LinuxLists.cc - [PATCH v3 0/4] GC0308 Camera Sensor

2023-10-27 01:15:34

Subject: [PATCH v3 0/4] GC0308 Camera Sensor

Hi,

I did the following tests done by me on an i.MX6ULL based system [0]:

* v4l2-compliance -u /dev/v4l-subdev1
- v4l2-compliance 1.24.1, 32 bits, 32-bit time_t
(from Debian testing)
- Total for device /dev/v4l-subdev1: 44, Succeeded: 44
* Using gstreamer + v4l2-ctl
- Tried 640x480, 320x240, 160x120 YUYV8_2X8 formats
- Tested effect of all exposed user controls
* checkpatch does not report any driver issues
* dt_binding_check does not report anything

Note, that there is another patchset adding GC2145, which
adds the same vendor prefix. I just included it for completeness,
since it's needed to avoid checkpatch and dt_binding_check
warnings.

[0] https://embedded-recipes.org/2023/schedule/running-foss-thermal-camera/

Changes since PATCHv2:
* https://lore.kernel.org/all/[email protected]/
* Simplify Kconfig dependencies
* Do not store code/resolution; which is available from subdev state
* Store register values for mode settings to avoid second lookup in
s_stream
* Reduce power_on sleep times
* remove debug dev_err() print, that I accidently added in v2
* add missing format check in gc0308_enum_frame_size()
* do not PM resume in gc0308_s_ctrl()
* enable and use runtime PM autosuspend
* add .init_cfg() PAD op
* use CCI helper instead of raw regmap
* cluster both flip controls
(that's not just a performance optimization, but fixes an issue,
that register update is slow, so fast sequential setting of VFLIP/HFLIP
override each other without this)
* simplify gc0308_set_power_line_freq
* free control handler on probe error
* use first format by default
* expose V4L2_CID_HBLANK, V4L2_CID_VBLANK, V4L2_CID_PIXEL_RATE
* remove incorrect support for framerate and instead add a comment

Changes since PATCHv1:
* https://lore.kernel.org/all/[email protected]/
* Update binding: i2c0 -> i2c
* Update binding: make GC0309 use GC0308 as fallback compatible
* Add regulator handling in power_on/power_off
* Fix alignment of regmap_multi_reg_write arguments
* Fix useless extra return
* Do not check for pad in gc0308_enum_frame_size()
* Drop get_mbus_config implementation
* Use V4L2_CID_AUTO_EXPOSURE_BIAS instead of V4L2_CID_EXPOSURE
* Drop gc0308_get_format in favour of v4l2_subdev_get_fmt
* Replace open-coded v4l2_find_nearest_size() logic
* check clock rate instead of setting it
* use fwnode_graph_get_endpoint_by_id()
* power off device when probe errors out after power on
* replace mutex with sub-device state
* add Galaxycore to generic camera sensors section in MAINTAINERS
* add GC0308 entry in MAINTAINERS

Greetings,

-- Sebastian

Sebastian Reichel (4):
dt-bindings: vendor-prefixes: add GalaxyCore
media: dt-bindings: gc0308: add binding
media: MAINTAINERS: Add GalaxyCore in camera sensor section
media: i2c: gc0308: new driver

.../bindings/media/i2c/galaxycore,gc0308.yaml | 108 ++
.../devicetree/bindings/vendor-prefixes.yaml | 2 +
MAINTAINERS | 8 +
drivers/media/i2c/Kconfig | 10 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/gc0308.c | 1437 +++++++++++++++++
6 files changed, 1566 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/galaxycore,gc0308.yaml
create mode 100644 drivers/media/i2c/gc0308.c

--
2.42.0

2023-10-27 01:15:50

by Sebastian Reichel

[permalink] [raw]

Subject: [PATCH v3 4/4] media: i2c: gc0308: new driver

Introduce new driver for GalaxyCore GC0308, which is a cheap
640x480 with an on-chip ISP sensor sold since 2010. Data is
provided via parallel bus.

Signed-off-by: Sebastian Reichel <[email protected]>
---
MAINTAINERS | 7 +
drivers/media/i2c/Kconfig | 10 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/gc0308.c | 1437 ++++++++++++++++++++++++++++++++++++
4 files changed, 1455 insertions(+)
create mode 100644 drivers/media/i2c/gc0308.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 5f64cd42ff37..f03fd34067d0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8627,6 +8627,13 @@ F: drivers/mfd/gateworks-gsc.c
F: include/linux/mfd/gsc.h
F: include/linux/platform_data/gsc_hwmon.h

+GC0308 GALAXYCORE CAMERA SENSOR DRIVER
+M: Sebastian Reichel <[email protected]>
+L: [email protected]
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/galaxycore,gc0308.yaml
+F: drivers/media/i2c/gc0308.c
+
GCC PLUGINS
M: Kees Cook <[email protected]>
L: [email protected]
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 74ff833ff48c..d7e52a9d3dd2 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -50,6 +50,16 @@ config VIDEO_AR0521
To compile this driver as a module, choose M here: the
module will be called ar0521.

+config VIDEO_GC0308
+ tristate "GalaxyCore GC0308 sensor support"
+ select V4L2_CCI_I2C
+ help
+ This is a Video4Linux2 sensor driver for the GalaxyCore
+ GC0308 camera.
+
+ To compile this driver as a module, choose M here: the
+ module will be called gc0308.
+
config VIDEO_HI556
tristate "Hynix Hi-556 sensor support"
help
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 80b00d39b48f..f03a21f2962a 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_VIDEO_DW9719) += dw9719.o
obj-$(CONFIG_VIDEO_DW9768) += dw9768.o
obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/
+obj-$(CONFIG_VIDEO_GC0308) += gc0308.o
obj-$(CONFIG_VIDEO_HI556) += hi556.o
obj-$(CONFIG_VIDEO_HI846) += hi846.o
obj-$(CONFIG_VIDEO_HI847) += hi847.o
diff --git a/drivers/media/i2c/gc0308.c b/drivers/media/i2c/gc0308.c
new file mode 100644
index 000000000000..3f117ece64ea
--- /dev/null
+++ b/drivers/media/i2c/gc0308.c
@@ -0,0 +1,1437 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for the GalaxyCore GC0308 camera sensor.
+ *
+ * Copyright (c) 2023 Sebastian Reichel <[email protected]>
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include <media/v4l2-cci.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+/* Analog & CISCTL*/
+#define GC0308_CHIP_ID CCI_REG8(0x000)
+#define GC0308_HBLANK CCI_REG8(0x001)
+#define GC0308_VBLANK CCI_REG8(0x002)
+#define GC0308_EXP CCI_REG16(0x003)
+#define GC0308_ROW_START CCI_REG16(0x005)
+#define GC0308_COL_START CCI_REG16(0x007)
+#define GC0308_WIN_HEIGHT CCI_REG16(0x009)
+#define GC0308_WIN_WIDTH CCI_REG16(0x00b)
+#define GC0308_VS_START_TIME CCI_REG8(0x00d) /* in rows */
+#define GC0308_VS_END_TIME CCI_REG8(0x00e) /* in rows */
+#define GC0308_VB_HB CCI_REG8(0x00f)
+#define GC0308_RSH_WIDTH CCI_REG8(0x010)
+#define GC0308_TSP_WIDTH CCI_REG8(0x011)
+#define GC0308_SAMPLE_HOLD_DELAY CCI_REG8(0x012)
+#define GC0308_ROW_TAIL_WIDTH CCI_REG8(0x013)
+#define GC0308_CISCTL_MODE1 CCI_REG8(0x014)
+#define GC0308_CISCTL_MODE2 CCI_REG8(0x015)
+#define GC0308_CISCTL_MODE3 CCI_REG8(0x016)
+#define GC0308_CISCTL_MODE4 CCI_REG8(0x017)
+#define GC0308_ANALOG_MODE1 CCI_REG8(0x01a)
+#define GC0308_ANALOG_MODE2 CCI_REG8(0x01b)
+#define GC0308_HRST_RSG_V18 CCI_REG8(0x01c)
+#define GC0308_VREF_V25 CCI_REG8(0x01d)
+#define GC0308_ADC_R CCI_REG8(0x01e)
+#define GC0308_PAD_DRV CCI_REG8(0x01f)
+#define GC0308_SOFT_RESET CCI_REG8(0x0fe)
+
+/* ISP */
+#define GC0308_BLOCK_EN1 CCI_REG8(0x020)
+#define GC0308_BLOCK_EN2 CCI_REG8(0x021)
+#define GC0308_AAAA_EN CCI_REG8(0x022)
+#define GC0308_SPECIAL_EFFECT CCI_REG8(0x023)
+#define GC0308_OUT_FORMAT CCI_REG8(0x024)
+#define GC0308_OUT_EN CCI_REG8(0x025)
+#define GC0308_SYNC_MODE CCI_REG8(0x026)
+#define GC0308_CLK_DIV_MODE CCI_REG8(0x028)
+#define GC0308_BYPASS_MODE CCI_REG8(0x029)
+#define GC0308_CLK_GATING CCI_REG8(0x02a)
+#define GC0308_DITHER_MODE CCI_REG8(0x02b)
+#define GC0308_DITHER_BIT CCI_REG8(0x02c)
+#define GC0308_DEBUG_MODE1 CCI_REG8(0x02d)
+#define GC0308_DEBUG_MODE2 CCI_REG8(0x02e)
+#define GC0308_DEBUG_MODE3 CCI_REG8(0x02f)
+#define GC0308_CROP_WIN_MODE CCI_REG8(0x046)
+#define GC0308_CROP_WIN_Y1 CCI_REG8(0x047)
+#define GC0308_CROP_WIN_X1 CCI_REG8(0x048)
+#define GC0308_CROP_WIN_HEIGHT CCI_REG16(0x049)
+#define GC0308_CROP_WIN_WIDTH CCI_REG16(0x04b)
+
+/* BLK */
+#define GC0308_BLK_MODE CCI_REG8(0x030)
+#define GC0308_BLK_LIMIT_VAL CCI_REG8(0x031)
+#define GC0308_GLOBAL_OFF CCI_REG8(0x032)
+#define GC0308_CURRENT_R_OFF CCI_REG8(0x033)
+#define GC0308_CURRENT_G_OFF CCI_REG8(0x034)
+#define GC0308_CURRENT_B_OFF CCI_REG8(0x035)
+#define GC0308_CURRENT_R_DARK_CURRENT CCI_REG8(0x036)
+#define GC0308_CURRENT_G_DARK_CURRENT CCI_REG8(0x037)
+#define GC0308_CURRENT_B_DARK_CURRENT CCI_REG8(0x038)
+#define GC0308_EXP_RATE_DARKC CCI_REG8(0x039)
+#define GC0308_OFF_SUBMODE CCI_REG8(0x03a)
+#define GC0308_DARKC_SUBMODE CCI_REG8(0x03b)
+#define GC0308_MANUAL_G1_OFF CCI_REG8(0x03c)
+#define GC0308_MANUAL_R1_OFF CCI_REG8(0x03d)
+#define GC0308_MANUAL_B2_OFF CCI_REG8(0x03e)
+#define GC0308_MANUAL_G2_OFF CCI_REG8(0x03f)
+
+/* PREGAIN */
+#define GC0308_GLOBAL_GAIN CCI_REG8(0x050)
+#define GC0308_AUTO_PREGAIN CCI_REG8(0x051)
+#define GC0308_AUTO_POSTGAIN CCI_REG8(0x052)
+#define GC0308_CHANNEL_GAIN_G1 CCI_REG8(0x053)
+#define GC0308_CHANNEL_GAIN_R CCI_REG8(0x054)
+#define GC0308_CHANNEL_GAIN_B CCI_REG8(0x055)
+#define GC0308_CHANNEL_GAIN_G2 CCI_REG8(0x056)
+#define GC0308_R_RATIO CCI_REG8(0x057)
+#define GC0308_G_RATIO CCI_REG8(0x058)
+#define GC0308_B_RATIO CCI_REG8(0x059)
+#define GC0308_AWB_R_GAIN CCI_REG8(0x05a)
+#define GC0308_AWB_G_GAIN CCI_REG8(0x05b)
+#define GC0308_AWB_B_GAIN CCI_REG8(0x05c)
+#define GC0308_LSC_DEC_LVL1 CCI_REG8(0x05d)
+#define GC0308_LSC_DEC_LVL2 CCI_REG8(0x05e)
+#define GC0308_LSC_DEC_LVL3 CCI_REG8(0x05f)
+
+/* DNDD */
+#define GC0308_DN_MODE_EN CCI_REG8(0x060)
+#define GC0308_DN_MODE_RATIO CCI_REG8(0x061)
+#define GC0308_DN_BILAT_B_BASE CCI_REG8(0x062)
+#define GC0308_DN_B_INCR CCI_REG8(0x063)
+#define GC0308_DN_BILAT_N_BASE CCI_REG8(0x064)
+#define GC0308_DN_N_INCR CCI_REG8(0x065)
+#define GC0308_DD_DARK_BRIGHT_TH CCI_REG8(0x066)
+#define GC0308_DD_FLAT_TH CCI_REG8(0x067)
+#define GC0308_DD_LIMIT CCI_REG8(0x068)
+
+/* ASDE - Auto Saturation De-noise and Edge-Enhancement */
+#define GC0308_ASDE_GAIN_TRESH CCI_REG8(0x069)
+#define GC0308_ASDE_GAIN_MODE CCI_REG8(0x06a)
+#define GC0308_ASDE_DN_SLOPE CCI_REG8(0x06b)
+#define GC0308_ASDE_DD_BRIGHT CCI_REG8(0x06c)
+#define GC0308_ASDE_DD_LIMIT CCI_REG8(0x06d)
+#define GC0308_ASDE_AUTO_EE1 CCI_REG8(0x06e)
+#define GC0308_ASDE_AUTO_EE2 CCI_REG8(0x06f)
+#define GC0308_ASDE_AUTO_SAT_DEC_SLOPE CCI_REG8(0x070)
+#define GC0308_ASDE_AUTO_SAT_LOW_LIMIT CCI_REG8(0x071)
+
+/* INTPEE - Interpolation and Edge-Enhancement */
+#define GC0308_EEINTP_MODE_1 CCI_REG8(0x072)
+#define GC0308_EEINTP_MODE_2 CCI_REG8(0x073)
+#define GC0308_DIRECTION_TH1 CCI_REG8(0x074)
+#define GC0308_DIRECTION_TH2 CCI_REG8(0x075)
+#define GC0308_DIFF_HV_TI_TH CCI_REG8(0x076)
+#define GC0308_EDGE12_EFFECT CCI_REG8(0x077)
+#define GC0308_EDGE_POS_RATIO CCI_REG8(0x078)
+#define GC0308_EDGE1_MINMAX CCI_REG8(0x079)
+#define GC0308_EDGE2_MINMAX CCI_REG8(0x07a)
+#define GC0308_EDGE12_TH CCI_REG8(0x07b)
+#define GC0308_EDGE_MAX CCI_REG8(0x07c)
+
+/* ABB - Auto Black Balance */
+#define GC0308_ABB_MODE CCI_REG8(0x080)
+#define GC0308_ABB_TARGET_AVGH CCI_REG8(0x081)
+#define GC0308_ABB_TARGET_AVGL CCI_REG8(0x082)
+#define GC0308_ABB_LIMIT_VAL CCI_REG8(0x083)
+#define GC0308_ABB_SPEED CCI_REG8(0x084)
+#define GC0308_CURR_R_BLACK_LVL CCI_REG8(0x085)
+#define GC0308_CURR_G_BLACK_LVL CCI_REG8(0x086)
+#define GC0308_CURR_B_BLACK_LVL CCI_REG8(0x087)
+#define GC0308_CURR_R_BLACK_FACTOR CCI_REG8(0x088)
+#define GC0308_CURR_G_BLACK_FACTOR CCI_REG8(0x089)
+#define GC0308_CURR_B_BLACK_FACTOR CCI_REG8(0x08a)
+
+/* LSC - Lens Shading Correction */
+#define GC0308_LSC_RED_B2 CCI_REG8(0x08b)
+#define GC0308_LSC_GREEN_B2 CCI_REG8(0x08c)
+#define GC0308_LSC_BLUE_B2 CCI_REG8(0x08d)
+#define GC0308_LSC_RED_B4 CCI_REG8(0x08e)
+#define GC0308_LSC_GREEN_B4 CCI_REG8(0x08f)
+#define GC0308_LSC_BLUE_B4 CCI_REG8(0x090)
+#define GC0308_LSC_ROW_CENTER CCI_REG8(0x091)
+#define GC0308_LSC_COL_CENTER CCI_REG8(0x092)
+
+/* CC - Channel Coefficient */
+#define GC0308_CC_MATRIX_C11 CCI_REG8(0x093)
+#define GC0308_CC_MATRIX_C12 CCI_REG8(0x094)
+#define GC0308_CC_MATRIX_C13 CCI_REG8(0x095)
+#define GC0308_CC_MATRIX_C21 CCI_REG8(0x096)
+#define GC0308_CC_MATRIX_C22 CCI_REG8(0x097)
+#define GC0308_CC_MATRIX_C23 CCI_REG8(0x098)
+#define GC0308_CC_MATRIX_C41 CCI_REG8(0x09c)
+#define GC0308_CC_MATRIX_C42 CCI_REG8(0x09d)
+#define GC0308_CC_MATRIX_C43 CCI_REG8(0x09e)
+
+/* GAMMA */
+#define GC0308_GAMMA_OUT0 CCI_REG8(0x09f)
+#define GC0308_GAMMA_OUT1 CCI_REG8(0x0a0)
+#define GC0308_GAMMA_OUT2 CCI_REG8(0x0a1)
+#define GC0308_GAMMA_OUT3 CCI_REG8(0x0a2)
+#define GC0308_GAMMA_OUT4 CCI_REG8(0x0a3)
+#define GC0308_GAMMA_OUT5 CCI_REG8(0x0a4)
+#define GC0308_GAMMA_OUT6 CCI_REG8(0x0a5)
+#define GC0308_GAMMA_OUT7 CCI_REG8(0x0a6)
+#define GC0308_GAMMA_OUT8 CCI_REG8(0x0a7)
+#define GC0308_GAMMA_OUT9 CCI_REG8(0x0a8)
+#define GC0308_GAMMA_OUT10 CCI_REG8(0x0a9)
+#define GC0308_GAMMA_OUT11 CCI_REG8(0x0aa)
+#define GC0308_GAMMA_OUT12 CCI_REG8(0x0ab)
+#define GC0308_GAMMA_OUT13 CCI_REG8(0x0ac)
+#define GC0308_GAMMA_OUT14 CCI_REG8(0x0ad)
+#define GC0308_GAMMA_OUT15 CCI_REG8(0x0ae)
+#define GC0308_GAMMA_OUT16 CCI_REG8(0x0af)
+
+/* YCP */
+#define GC0308_GLOBAL_SATURATION CCI_REG8(0x0b0)
+#define GC0308_SATURATION_CB CCI_REG8(0x0b1)
+#define GC0308_SATURATION_CR CCI_REG8(0x0b2)
+#define GC0308_LUMA_CONTRAST CCI_REG8(0x0b3)
+#define GC0308_CONTRAST_CENTER CCI_REG8(0x0b4)
+#define GC0308_LUMA_OFFSET CCI_REG8(0x0b5)
+#define GC0308_SKIN_CB_CENTER CCI_REG8(0x0b6)
+#define GC0308_SKIN_CR_CENTER CCI_REG8(0x0b7)
+#define GC0308_SKIN_RADIUS_SQUARE CCI_REG8(0x0b8)
+#define GC0308_SKIN_BRIGHTNESS CCI_REG8(0x0b9)
+#define GC0308_FIXED_CB CCI_REG8(0x0ba)
+#define GC0308_FIXED_CR CCI_REG8(0x0bb)
+#define GC0308_EDGE_DEC_SA CCI_REG8(0x0bd)
+#define GC0308_AUTO_GRAY_MODE CCI_REG8(0x0be)
+#define GC0308_SATURATION_SUB_STRENGTH CCI_REG8(0x0bf)
+#define GC0308_Y_GAMMA_OUT0 CCI_REG8(0x0c0)
+#define GC0308_Y_GAMMA_OUT1 CCI_REG8(0x0c1)
+#define GC0308_Y_GAMMA_OUT2 CCI_REG8(0x0c2)
+#define GC0308_Y_GAMMA_OUT3 CCI_REG8(0x0c3)
+#define GC0308_Y_GAMMA_OUT4 CCI_REG8(0x0c4)
+#define GC0308_Y_GAMMA_OUT5 CCI_REG8(0x0c5)
+#define GC0308_Y_GAMMA_OUT6 CCI_REG8(0x0c6)
+#define GC0308_Y_GAMMA_OUT7 CCI_REG8(0x0c7)
+#define GC0308_Y_GAMMA_OUT8 CCI_REG8(0x0c8)
+#define GC0308_Y_GAMMA_OUT9 CCI_REG8(0x0c9)
+#define GC0308_Y_GAMMA_OUT10 CCI_REG8(0x0ca)
+#define GC0308_Y_GAMMA_OUT11 CCI_REG8(0x0cb)
+#define GC0308_Y_GAMMA_OUT12 CCI_REG8(0x0cc)
+
+/* AEC - Automatic Exposure Control */
+#define GC0308_AEC_MODE1 CCI_REG8(0x0d0)
+#define GC0308_AEC_MODE2 CCI_REG8(0x0d1)
+#define GC0308_AEC_MODE3 CCI_REG8(0x0d2)
+#define GC0308_AEC_TARGET_Y CCI_REG8(0x0d3)
+#define GC0308_Y_AVG CCI_REG8(0x0d4)
+#define GC0308_AEC_HIGH_LOW_RANGE CCI_REG8(0x0d5)
+#define GC0308_AEC_IGNORE CCI_REG8(0x0d6)
+#define GC0308_AEC_LIMIT_HIGH_RANGE CCI_REG8(0x0d7)
+#define GC0308_AEC_R_OFFSET CCI_REG8(0x0d9)
+#define GC0308_AEC_GB_OFFSET CCI_REG8(0x0da)
+#define GC0308_AEC_SLOW_MARGIN CCI_REG8(0x0db)
+#define GC0308_AEC_FAST_MARGIN CCI_REG8(0x0dc)
+#define GC0308_AEC_EXP_CHANGE_GAIN CCI_REG8(0x0dd)
+#define GC0308_AEC_STEP2_SUNLIGHT CCI_REG8(0x0de)
+#define GC0308_AEC_I_FRAMES CCI_REG8(0x0df)
+#define GC0308_AEC_I_STOP_L_MARGIN CCI_REG8(0x0e0)
+#define GC0308_AEC_I_STOP_MARGIN CCI_REG8(0x0e1)
+#define GC0308_ANTI_FLICKER_STEP CCI_REG16(0x0e2)
+#define GC0308_EXP_LVL_1 CCI_REG16(0x0e4)
+#define GC0308_EXP_LVL_2 CCI_REG16(0x0e6)
+#define GC0308_EXP_LVL_3 CCI_REG16(0x0e8)
+#define GC0308_EXP_LVL_4 CCI_REG16(0x0ea)
+#define GC0308_MAX_EXP_LVL CCI_REG8(0x0ec)
+#define GC0308_EXP_MIN_L CCI_REG8(0x0ed)
+#define GC0308_MAX_POST_DF_GAIN CCI_REG8(0x0ee)
+#define GC0308_MAX_PRE_DG_GAIN CCI_REG8(0x0ef)
+
+/* ABS */
+#define GC0308_ABS_RANGE_COMP CCI_REG8(0x0f0)
+#define GC0308_ABS_STOP_MARGIN CCI_REG8(0x0f1)
+#define GC0308_Y_S_COMP CCI_REG8(0x0f2)
+#define GC0308_Y_STRETCH_LIMIT CCI_REG8(0x0f3)
+#define GC0308_Y_TILT CCI_REG8(0x0f4)
+#define GC0308_Y_STRETCH CCI_REG8(0x0f5)
+
+/* Measure Window */
+#define GC0308_BIG_WIN_X0 CCI_REG8(0x0f7)
+#define GC0308_BIG_WIN_Y0 CCI_REG8(0x0f8)
+#define GC0308_BIG_WIN_X1 CCI_REG8(0x0f9)
+#define GC0308_BIG_WIN_Y1 CCI_REG8(0x0fa)
+#define GC0308_DIFF_Y_BIG_THD CCI_REG8(0x0fb)
+
+/* OUT Module (P1) */
+#define GC0308_CLOSE_FRAME_EN CCI_REG8(0x150)
+#define GC0308_CLOSE_FRAME_NUM1 CCI_REG8(0x151)
+#define GC0308_CLOSE_FRAME_NUM2 CCI_REG8(0x152)
+#define GC0308_BAYER_MODE CCI_REG8(0x153)
+#define GC0308_SUBSAMPLE CCI_REG8(0x154)
+#define GC0308_SUBMODE CCI_REG8(0x155)
+#define GC0308_SUB_ROW_N1 CCI_REG8(0x156)
+#define GC0308_SUB_ROW_N2 CCI_REG8(0x157)
+#define GC0308_SUB_COL_N1 CCI_REG8(0x158)
+#define GC0308_SUB_COL_N2 CCI_REG8(0x159)
+
+/* AWB (P1) - Auto White Balance */
+#define GC0308_AWB_RGB_HIGH_LOW CCI_REG8(0x100)
+#define GC0308_AWB_Y_TO_C_DIFF2 CCI_REG8(0x102)
+#define GC0308_AWB_C_MAX CCI_REG8(0x104)
+#define GC0308_AWB_C_INTER CCI_REG8(0x105)
+#define GC0308_AWB_C_INTER2 CCI_REG8(0x106)
+#define GC0308_AWB_C_MAX_BIG CCI_REG8(0x108)
+#define GC0308_AWB_Y_HIGH CCI_REG8(0x109)
+#define GC0308_AWB_NUMBER_LIMIT CCI_REG8(0x10a)
+#define GC0308_KWIN_RATIO CCI_REG8(0x10b)
+#define GC0308_KWIN_THD CCI_REG8(0x10c)
+#define GC0308_LIGHT_GAIN_RANGE CCI_REG8(0x10d)
+#define GC0308_SMALL_WIN_WIDTH_STEP CCI_REG8(0x10e)
+#define GC0308_SMALL_WIN_HEIGHT_STEP CCI_REG8(0x10f)
+#define GC0308_AWB_YELLOW_TH CCI_REG8(0x110)
+#define GC0308_AWB_MODE CCI_REG8(0x111)
+#define GC0308_AWB_ADJUST_SPEED CCI_REG8(0x112)
+#define GC0308_AWB_EVERY_N CCI_REG8(0x113)
+#define GC0308_R_AVG_USE CCI_REG8(0x1d0)
+#define GC0308_G_AVG_USE CCI_REG8(0x1d1)
+#define GC0308_B_AVG_USE CCI_REG8(0x1d2)
+
+#define GC0308_HBLANK_MIN 0x021
+#define GC0308_HBLANK_MAX 0xfff
+#define GC0308_HBLANK_DEF 0x040
+
+#define GC0308_VBLANK_MIN 0x000
+#define GC0308_VBLANK_MAX 0xfff
+#define GC0308_VBLANK_DEF 0x020
+
+#define GC0308_PIXEL_RATE 24000000
+
+/*
+ * frame_time = (BT + height + 8) * row_time
+ * width = 640 (driver does not change window size)
+ * height = 480 (driver does not change window size)
+ * row_time = HBLANK + SAMPLE_HOLD_DELAY + width + 8 + 4
+ *
+ * When EXP_TIME > (BT + height):
+ * BT = EXP_TIME - height - 8 - VS_START_TIME + VS_END_TIME
+ * else:
+ * BT = VBLANK + VS_START_TIME + VS_END_TIME
+ *
+ * max is 30 FPS
+ *
+ * In my tests frame rate mostly depends on exposure time. Unfortuantely
+ * it's unclear how this is calculated exactly. Also since we enable AEC,
+ * the frame times vary depending on ambient light conditions.
+ */
+#define GC0308_FRAME_RATE_MAX 30
+
+enum gc0308_exp_val {
+ GC0308_EXP_M4 = 0,
+ GC0308_EXP_M3,
+ GC0308_EXP_M2,
+ GC0308_EXP_M1,
+ GC0308_EXP_0,
+ GC0308_EXP_P1,
+ GC0308_EXP_P2,
+ GC0308_EXP_P3,
+ GC0308_EXP_P4,
+};
+
+static const s64 gc0308_exposure_menu[] = {
+ -4, -3, -2, -1, 0, 1, 2, 3, 4
+};
+
+struct gc0308_exposure {
+ u8 luma_offset;
+ u8 aec_target_y;
+};
+
+#define GC0308_EXPOSURE(luma_offset_reg, aec_target_y_reg) \
+ { .luma_offset = luma_offset_reg, .aec_target_y = aec_target_y_reg }
+
+static const struct gc0308_exposure gc0308_exposure_values[] = {
+ [GC0308_EXP_M4] = GC0308_EXPOSURE(0xc0, 0x30),
+ [GC0308_EXP_M3] = GC0308_EXPOSURE(0xd0, 0x38),
+ [GC0308_EXP_M2] = GC0308_EXPOSURE(0xe0, 0x40),
+ [GC0308_EXP_M1] = GC0308_EXPOSURE(0xf0, 0x48),
+ [GC0308_EXP_0] = GC0308_EXPOSURE(0x08, 0x50),
+ [GC0308_EXP_P1] = GC0308_EXPOSURE(0x10, 0x5c),
+ [GC0308_EXP_P2] = GC0308_EXPOSURE(0x20, 0x60),
+ [GC0308_EXP_P3] = GC0308_EXPOSURE(0x30, 0x68),
+ [GC0308_EXP_P4] = GC0308_EXPOSURE(0x40, 0x70),
+};
+
+struct gc0308_awb_gains {
+ u8 r;
+ u8 g;
+ u8 b;
+};
+
+#define GC0308_AWB_GAINS(red, green, blue) \
+ { .r = red, .g = green, .b = blue }
+
+static const struct gc0308_awb_gains gc0308_awb_gains[] = {
+ [V4L2_WHITE_BALANCE_AUTO] = GC0308_AWB_GAINS(0x56, 0x40, 0x4a),
+ [V4L2_WHITE_BALANCE_CLOUDY] = GC0308_AWB_GAINS(0x8c, 0x50, 0x40),
+ [V4L2_WHITE_BALANCE_DAYLIGHT] = GC0308_AWB_GAINS(0x74, 0x52, 0x40),
+ [V4L2_WHITE_BALANCE_INCANDESCENT] = GC0308_AWB_GAINS(0x48, 0x40, 0x5c),
+ [V4L2_WHITE_BALANCE_FLUORESCENT] = GC0308_AWB_GAINS(0x40, 0x42, 0x50),
+};
+
+struct gc0308_format {
+ u32 code;
+ u8 regval;
+};
+
+#define GC0308_FORMAT(v4l2_code, gc0308_regval) \
+ { .code = v4l2_code, .regval = gc0308_regval }
+
+static const struct gc0308_format gc0308_formats[] = {
+ GC0308_FORMAT(MEDIA_BUS_FMT_UYVY8_2X8, 0x00),
+ GC0308_FORMAT(MEDIA_BUS_FMT_VYUY8_2X8, 0x01),
+ GC0308_FORMAT(MEDIA_BUS_FMT_YUYV8_2X8, 0x02),
+ GC0308_FORMAT(MEDIA_BUS_FMT_YVYU8_2X8, 0x03),
+ GC0308_FORMAT(MEDIA_BUS_FMT_RGB565_2X8_BE, 0x06),
+ GC0308_FORMAT(MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE, 0x07),
+ GC0308_FORMAT(MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE, 0x09),
+};
+
+struct gc0308_frame_size {
+ u8 subsample;
+ u32 width;
+ u32 height;
+};
+
+#define GC0308_FRAME_SIZE(s, w, h) \
+ { .subsample = s, .width = w, .height = h }
+
+static const struct gc0308_frame_size gc0308_frame_sizes[] = {
+ GC0308_FRAME_SIZE(0x11, 640, 480),
+ GC0308_FRAME_SIZE(0x22, 320, 240),
+ GC0308_FRAME_SIZE(0x44, 160, 120),
+};
+
+struct gc0308_mode_registers {
+ u8 out_format;
+ u8 subsample;
+ u16 width;
+ u16 height;
+};
+
+struct gc0308 {
+ struct v4l2_subdev sd;
+ struct v4l2_ctrl_handler hdl;
+ struct media_pad pad;
+ struct device *dev;
+ struct clk *clk;
+ struct regmap *regmap;
+ struct regulator *vdd;
+ struct gpio_desc *pwdn_gpio;
+ struct gpio_desc *reset_gpio;
+ unsigned int mbus_config;
+ struct gc0308_mode_registers mode;
+ struct {
+ /* mirror cluster */
+ struct v4l2_ctrl *hflip;
+ struct v4l2_ctrl *vflip;
+ };
+ struct {
+ /* blanking cluster */
+ struct v4l2_ctrl *hblank;
+ struct v4l2_ctrl *vblank;
+ };
+};
+
+static inline struct gc0308 *to_gc0308(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct gc0308, sd);
+}
+
+static const struct regmap_range_cfg gc0308_ranges[] = {
+ {
+ .range_min = 0x0000,
+ .range_max = 0x01ff,
+ .selector_reg = 0xfe,
+ .selector_mask = 0x01,
+ .selector_shift = 0x00,
+ .window_start = 0x00,
+ .window_len = 0x100,
+ },
+};
+
+static const struct regmap_config gc0308_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .reg_format_endian = REGMAP_ENDIAN_BIG,
+ .max_register = 0x1ff,
+ .ranges = gc0308_ranges,
+ .num_ranges = ARRAY_SIZE(gc0308_ranges),
+ .disable_locking = true,
+};
+
+static const struct cci_reg_sequence sensor_default_regs[] = {
+ {GC0308_VB_HB, 0x00},
+ {GC0308_HBLANK, 0x40},
+ {GC0308_VBLANK, 0x20},
+ {GC0308_EXP, 0x0258},
+ {GC0308_AWB_R_GAIN, 0x56},
+ {GC0308_AWB_G_GAIN, 0x40},
+ {GC0308_AWB_B_GAIN, 0x4a},
+ {GC0308_ANTI_FLICKER_STEP, 0x0078},
+ {GC0308_EXP_LVL_1, 0x0258},
+ {GC0308_EXP_LVL_2, 0x0258},
+ {GC0308_EXP_LVL_3, 0x0258},
+ {GC0308_EXP_LVL_4, 0x0ea6},
+ {GC0308_MAX_EXP_LVL, 0x20},
+ {GC0308_ROW_START, 0x0000},
+ {GC0308_COL_START, 0x0000},
+ {GC0308_WIN_HEIGHT, 488},
+ {GC0308_WIN_WIDTH, 648},
+ {GC0308_VS_START_TIME, 0x02},
+ {GC0308_VS_END_TIME, 0x02},
+ {GC0308_RSH_WIDTH, 0x22},
+ {GC0308_TSP_WIDTH, 0x0d},
+ {GC0308_SAMPLE_HOLD_DELAY, 0x50},
+ {GC0308_ROW_TAIL_WIDTH, 0x0f},
+ {GC0308_CISCTL_MODE1, 0x10},
+ {GC0308_CISCTL_MODE2, 0x0a},
+ {GC0308_CISCTL_MODE3, 0x05},
+ {GC0308_CISCTL_MODE4, 0x01},
+ {CCI_REG8(0x018), 0x44}, /* undocumented */
+ {CCI_REG8(0x019), 0x44}, /* undocumented */
+ {GC0308_ANALOG_MODE1, 0x2a},
+ {GC0308_ANALOG_MODE2, 0x00},
+ {GC0308_HRST_RSG_V18, 0x49},
+ {GC0308_VREF_V25, 0x9a},
+ {GC0308_ADC_R, 0x61},
+ {GC0308_PAD_DRV, 0x01}, /* drv strength: pclk=4mA */
+ {GC0308_BLOCK_EN1, 0x7f},
+ {GC0308_BLOCK_EN2, 0xfa},
+ {GC0308_AAAA_EN, 0x57},
+ {GC0308_OUT_FORMAT, 0xa2}, /* YCbYCr */
+ {GC0308_OUT_EN, 0x0f},
+ {GC0308_SYNC_MODE, 0x03},
+ {GC0308_CLK_DIV_MODE, 0x00},
+ {GC0308_DEBUG_MODE1, 0x0a},
+ {GC0308_DEBUG_MODE2, 0x00},
+ {GC0308_DEBUG_MODE3, 0x01},
+ {GC0308_BLK_MODE, 0xf7},
+ {GC0308_BLK_LIMIT_VAL, 0x50},
+ {GC0308_GLOBAL_OFF, 0x00},
+ {GC0308_CURRENT_R_OFF, 0x28},
+ {GC0308_CURRENT_G_OFF, 0x2a},
+ {GC0308_CURRENT_B_OFF, 0x28},
+ {GC0308_EXP_RATE_DARKC, 0x04},
+ {GC0308_OFF_SUBMODE, 0x20},
+ {GC0308_DARKC_SUBMODE, 0x20},
+ {GC0308_MANUAL_G1_OFF, 0x00},
+ {GC0308_MANUAL_R1_OFF, 0x00},
+ {GC0308_MANUAL_B2_OFF, 0x00},
+ {GC0308_MANUAL_G2_OFF, 0x00},
+ {GC0308_GLOBAL_GAIN, 0x14},
+ {GC0308_AUTO_POSTGAIN, 0x41},
+ {GC0308_CHANNEL_GAIN_G1, 0x80},
+ {GC0308_CHANNEL_GAIN_R, 0x80},
+ {GC0308_CHANNEL_GAIN_B, 0x80},
+ {GC0308_CHANNEL_GAIN_G2, 0x80},
+ {GC0308_LSC_RED_B2, 0x20},
+ {GC0308_LSC_GREEN_B2, 0x20},
+ {GC0308_LSC_BLUE_B2, 0x20},
+ {GC0308_LSC_RED_B4, 0x14},
+ {GC0308_LSC_GREEN_B4, 0x10},
+ {GC0308_LSC_BLUE_B4, 0x14},
+ {GC0308_LSC_ROW_CENTER, 0x3c},
+ {GC0308_LSC_COL_CENTER, 0x50},
+ {GC0308_LSC_DEC_LVL1, 0x12},
+ {GC0308_LSC_DEC_LVL2, 0x1a},
+ {GC0308_LSC_DEC_LVL3, 0x24},
+ {GC0308_DN_MODE_EN, 0x07},
+ {GC0308_DN_MODE_RATIO, 0x15},
+ {GC0308_DN_BILAT_B_BASE, 0x08},
+ {GC0308_DN_BILAT_N_BASE, 0x03},
+ {GC0308_DD_DARK_BRIGHT_TH, 0xe8},
+ {GC0308_DD_FLAT_TH, 0x86},
+ {GC0308_DD_LIMIT, 0x82},
+ {GC0308_ASDE_GAIN_TRESH, 0x18},
+ {GC0308_ASDE_GAIN_MODE, 0x0f},
+ {GC0308_ASDE_DN_SLOPE, 0x00},
+ {GC0308_ASDE_DD_BRIGHT, 0x5f},
+ {GC0308_ASDE_DD_LIMIT, 0x8f},
+ {GC0308_ASDE_AUTO_EE1, 0x55},
+ {GC0308_ASDE_AUTO_EE2, 0x38},
+ {GC0308_ASDE_AUTO_SAT_DEC_SLOPE, 0x15},
+ {GC0308_ASDE_AUTO_SAT_LOW_LIMIT, 0x33},
+ {GC0308_EEINTP_MODE_1, 0xdc},
+ {GC0308_EEINTP_MODE_2, 0x00},
+ {GC0308_DIRECTION_TH1, 0x02},
+ {GC0308_DIRECTION_TH2, 0x3f},
+ {GC0308_DIFF_HV_TI_TH, 0x02},
+ {GC0308_EDGE12_EFFECT, 0x38},
+ {GC0308_EDGE_POS_RATIO, 0x88},
+ {GC0308_EDGE1_MINMAX, 0x81},
+ {GC0308_EDGE2_MINMAX, 0x81},
+ {GC0308_EDGE12_TH, 0x22},
+ {GC0308_EDGE_MAX, 0xff},
+ {GC0308_CC_MATRIX_C11, 0x48},
+ {GC0308_CC_MATRIX_C12, 0x02},
+ {GC0308_CC_MATRIX_C13, 0x07},
+ {GC0308_CC_MATRIX_C21, 0xe0},
+ {GC0308_CC_MATRIX_C22, 0x40},
+ {GC0308_CC_MATRIX_C23, 0xf0},
+ {GC0308_SATURATION_CB, 0x40},
+ {GC0308_SATURATION_CR, 0x40},
+ {GC0308_LUMA_CONTRAST, 0x40},
+ {GC0308_SKIN_CB_CENTER, 0xe0},
+ {GC0308_EDGE_DEC_SA, 0x38},
+ {GC0308_AUTO_GRAY_MODE, 0x36},
+ {GC0308_AEC_MODE1, 0xcb},
+ {GC0308_AEC_MODE2, 0x10},
+ {GC0308_AEC_MODE3, 0x90},
+ {GC0308_AEC_TARGET_Y, 0x48},
+ {GC0308_AEC_HIGH_LOW_RANGE, 0xf2},
+ {GC0308_AEC_IGNORE, 0x16},
+ {GC0308_AEC_SLOW_MARGIN, 0x92},
+ {GC0308_AEC_FAST_MARGIN, 0xa5},
+ {GC0308_AEC_I_FRAMES, 0x23},
+ {GC0308_AEC_R_OFFSET, 0x00},
+ {GC0308_AEC_GB_OFFSET, 0x00},
+ {GC0308_AEC_I_STOP_L_MARGIN, 0x09},
+ {GC0308_EXP_MIN_L, 0x04},
+ {GC0308_MAX_POST_DF_GAIN, 0xa0},
+ {GC0308_MAX_PRE_DG_GAIN, 0x40},
+ {GC0308_ABB_MODE, 0x03},
+ {GC0308_GAMMA_OUT0, 0x10},
+ {GC0308_GAMMA_OUT1, 0x20},
+ {GC0308_GAMMA_OUT2, 0x38},
+ {GC0308_GAMMA_OUT3, 0x4e},
+ {GC0308_GAMMA_OUT4, 0x63},
+ {GC0308_GAMMA_OUT5, 0x76},
+ {GC0308_GAMMA_OUT6, 0x87},
+ {GC0308_GAMMA_OUT7, 0xa2},
+ {GC0308_GAMMA_OUT8, 0xb8},
+ {GC0308_GAMMA_OUT9, 0xca},
+ {GC0308_GAMMA_OUT10, 0xd8},
+ {GC0308_GAMMA_OUT11, 0xe3},
+ {GC0308_GAMMA_OUT12, 0xeb},
+ {GC0308_GAMMA_OUT13, 0xf0},
+ {GC0308_GAMMA_OUT14, 0xf8},
+ {GC0308_GAMMA_OUT15, 0xfd},
+ {GC0308_GAMMA_OUT16, 0xff},
+ {GC0308_Y_GAMMA_OUT0, 0x00},
+ {GC0308_Y_GAMMA_OUT1, 0x10},
+ {GC0308_Y_GAMMA_OUT2, 0x1c},
+ {GC0308_Y_GAMMA_OUT3, 0x30},
+ {GC0308_Y_GAMMA_OUT4, 0x43},
+ {GC0308_Y_GAMMA_OUT5, 0x54},
+ {GC0308_Y_GAMMA_OUT6, 0x65},
+ {GC0308_Y_GAMMA_OUT7, 0x75},
+ {GC0308_Y_GAMMA_OUT8, 0x93},
+ {GC0308_Y_GAMMA_OUT9, 0xb0},
+ {GC0308_Y_GAMMA_OUT10, 0xcb},
+ {GC0308_Y_GAMMA_OUT11, 0xe6},
+ {GC0308_Y_GAMMA_OUT12, 0xff},
+ {GC0308_ABS_RANGE_COMP, 0x02},
+ {GC0308_ABS_STOP_MARGIN, 0x01},
+ {GC0308_Y_S_COMP, 0x02},
+ {GC0308_Y_STRETCH_LIMIT, 0x30},
+ {GC0308_BIG_WIN_X0, 0x12},
+ {GC0308_BIG_WIN_Y0, 0x0a},
+ {GC0308_BIG_WIN_X1, 0x9f},
+ {GC0308_BIG_WIN_Y1, 0x78},
+ {GC0308_AWB_RGB_HIGH_LOW, 0xf5},
+ {GC0308_AWB_Y_TO_C_DIFF2, 0x20},
+ {GC0308_AWB_C_MAX, 0x10},
+ {GC0308_AWB_C_INTER, 0x08},
+ {GC0308_AWB_C_INTER2, 0x20},
+ {GC0308_AWB_C_MAX_BIG, 0x0a},
+ {GC0308_AWB_NUMBER_LIMIT, 0xa0},
+ {GC0308_KWIN_RATIO, 0x60},
+ {GC0308_KWIN_THD, 0x08},
+ {GC0308_SMALL_WIN_WIDTH_STEP, 0x44},
+ {GC0308_SMALL_WIN_HEIGHT_STEP, 0x32},
+ {GC0308_AWB_YELLOW_TH, 0x41},
+ {GC0308_AWB_MODE, 0x37},
+ {GC0308_AWB_ADJUST_SPEED, 0x22},
+ {GC0308_AWB_EVERY_N, 0x19},
+ {CCI_REG8(0x114), 0x44}, /* AWB set1 */
+ {CCI_REG8(0x115), 0x44}, /* AWB set1 */
+ {CCI_REG8(0x116), 0xc2}, /* AWB set1 */
+ {CCI_REG8(0x117), 0xa8}, /* AWB set1 */
+ {CCI_REG8(0x118), 0x18}, /* AWB set1 */
+ {CCI_REG8(0x119), 0x50}, /* AWB set1 */
+ {CCI_REG8(0x11a), 0xd8}, /* AWB set1 */
+ {CCI_REG8(0x11b), 0xf5}, /* AWB set1 */
+ {CCI_REG8(0x170), 0x40}, /* AWB set2 */
+ {CCI_REG8(0x171), 0x58}, /* AWB set2 */
+ {CCI_REG8(0x172), 0x30}, /* AWB set2 */
+ {CCI_REG8(0x173), 0x48}, /* AWB set2 */
+ {CCI_REG8(0x174), 0x20}, /* AWB set2 */
+ {CCI_REG8(0x175), 0x60}, /* AWB set2 */
+ {CCI_REG8(0x177), 0x20}, /* AWB set2 */
+ {CCI_REG8(0x178), 0x32}, /* AWB set2 */
+ {CCI_REG8(0x130), 0x03}, /* undocumented */
+ {CCI_REG8(0x131), 0x40}, /* undocumented */
+ {CCI_REG8(0x132), 0x10}, /* undocumented */
+ {CCI_REG8(0x133), 0xe0}, /* undocumented */
+ {CCI_REG8(0x134), 0xe0}, /* undocumented */
+ {CCI_REG8(0x135), 0x00}, /* undocumented */
+ {CCI_REG8(0x136), 0x80}, /* undocumented */
+ {CCI_REG8(0x137), 0x00}, /* undocumented */
+ {CCI_REG8(0x138), 0x04}, /* undocumented */
+ {CCI_REG8(0x139), 0x09}, /* undocumented */
+ {CCI_REG8(0x13a), 0x12}, /* undocumented */
+ {CCI_REG8(0x13b), 0x1c}, /* undocumented */
+ {CCI_REG8(0x13c), 0x28}, /* undocumented */
+ {CCI_REG8(0x13d), 0x31}, /* undocumented */
+ {CCI_REG8(0x13e), 0x44}, /* undocumented */
+ {CCI_REG8(0x13f), 0x57}, /* undocumented */
+ {CCI_REG8(0x140), 0x6c}, /* undocumented */
+ {CCI_REG8(0x141), 0x81}, /* undocumented */
+ {CCI_REG8(0x142), 0x94}, /* undocumented */
+ {CCI_REG8(0x143), 0xa7}, /* undocumented */
+ {CCI_REG8(0x144), 0xb8}, /* undocumented */
+ {CCI_REG8(0x145), 0xd6}, /* undocumented */
+ {CCI_REG8(0x146), 0xee}, /* undocumented */
+ {CCI_REG8(0x147), 0x0d}, /* undocumented */
+ {CCI_REG8(0x162), 0xf7}, /* undocumented */
+ {CCI_REG8(0x163), 0x68}, /* undocumented */
+ {CCI_REG8(0x164), 0xd3}, /* undocumented */
+ {CCI_REG8(0x165), 0xd3}, /* undocumented */
+ {CCI_REG8(0x166), 0x60}, /* undocumented */
+};
+
+struct gc0308_colormode {
+ u8 special_effect;
+ u8 dbg_mode1;
+ u8 block_en1;
+ u8 aec_mode3;
+ u8 eeintp_mode_2;
+ u8 edge12_effect;
+ u8 luma_contrast;
+ u8 contrast_center;
+ u8 fixed_cb;
+ u8 fixed_cr;
+};
+
+#define GC0308_COLOR_FX(reg_special_effect, reg_dbg_mode1, reg_block_en1, \
+ reg_aec_mode3, reg_eeintp_mode_2, reg_edge12_effect, \
+ reg_luma_contrast, reg_contrast_center, \
+ reg_fixed_cb, reg_fixed_cr) \
+ { \
+ .special_effect = reg_special_effect, \
+ .dbg_mode1 = reg_dbg_mode1, \
+ .block_en1 = reg_block_en1, \
+ .aec_mode3 = reg_aec_mode3, \
+ .eeintp_mode_2 = reg_eeintp_mode_2, \
+ .edge12_effect = reg_edge12_effect, \
+ .luma_contrast = reg_luma_contrast, \
+ .contrast_center = reg_contrast_center, \
+ .fixed_cb = reg_fixed_cb, \
+ .fixed_cr = reg_fixed_cr, \
+ }
+
+static const struct gc0308_colormode gc0308_colormodes[] = {
+ [V4L2_COLORFX_NONE] =
+ GC0308_COLOR_FX(0x00, 0x0a, 0xff, 0x90, 0x00,
+ 0x54, 0x3c, 0x80, 0x00, 0x00),
+ [V4L2_COLORFX_BW] =
+ GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x00,
+ 0x54, 0x40, 0x80, 0x00, 0x00),
+ [V4L2_COLORFX_SEPIA] =
+ GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x00,
+ 0x38, 0x40, 0x80, 0xd0, 0x28),
+ [V4L2_COLORFX_NEGATIVE] =
+ GC0308_COLOR_FX(0x01, 0x0a, 0xff, 0x90, 0x00,
+ 0x38, 0x40, 0x80, 0x00, 0x00),
+ [V4L2_COLORFX_EMBOSS] =
+ GC0308_COLOR_FX(0x02, 0x0a, 0xbf, 0x10, 0x01,
+ 0x38, 0x40, 0x80, 0x00, 0x00),
+ [V4L2_COLORFX_SKETCH] =
+ GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x10, 0x80,
+ 0x38, 0x80, 0x90, 0x00, 0x00),
+ [V4L2_COLORFX_SKY_BLUE] =
+ GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x00,
+ 0x38, 0x40, 0x80, 0x50, 0xe0),
+ [V4L2_COLORFX_GRASS_GREEN] =
+ GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x01,
+ 0x38, 0x40, 0x80, 0xc0, 0xc0),
+ [V4L2_COLORFX_SKIN_WHITEN] =
+ GC0308_COLOR_FX(0x02, 0x0a, 0xbf, 0x10, 0x01,
+ 0x38, 0x60, 0x40, 0x00, 0x00),
+};
+
+static int gc0308_power_on(struct device *dev)
+{
+ struct gc0308 *gc0308 = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regulator_enable(gc0308->vdd);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(gc0308->clk);
+ if (ret)
+ goto clk_fail;
+
+ gpiod_set_value_cansleep(gc0308->pwdn_gpio, 0);
+ usleep_range(10000, 20000);
+
+ gpiod_set_value_cansleep(gc0308->reset_gpio, 1);
+ usleep_range(10000, 20000);
+ gpiod_set_value_cansleep(gc0308->reset_gpio, 0);
+ msleep(30);
+
+ return 0;
+
+clk_fail:
+ regulator_disable(gc0308->vdd);
+ return ret;
+}
+
+static int gc0308_power_off(struct device *dev)
+{
+ struct gc0308 *gc0308 = dev_get_drvdata(dev);
+
+ gpiod_set_value_cansleep(gc0308->pwdn_gpio, 1);
+ clk_disable_unprepare(gc0308->clk);
+ regulator_disable(gc0308->vdd);
+
+ return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int gc0308_g_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct gc0308 *gc0308 = to_gc0308(sd);
+
+ return cci_read(gc0308->regmap, CCI_REG8(reg->reg), &reg->val, NULL);
+}
+
+static int gc0308_s_register(struct v4l2_subdev *sd,
+ const struct v4l2_dbg_register *reg)
+{
+ struct gc0308 *gc0308 = to_gc0308(sd);
+
+ return cci_write(gc0308->regmap, CCI_REG8(reg->reg), reg->val, NULL);
+}
+#endif
+
+static int gc0308_set_exposure(struct gc0308 *gc0308, enum gc0308_exp_val exp)
+{
+ const struct gc0308_exposure *regs = &gc0308_exposure_values[exp];
+ struct cci_reg_sequence exposure_reg_seq[] = {
+ {GC0308_LUMA_OFFSET, regs->luma_offset},
+ {GC0308_AEC_TARGET_Y, regs->aec_target_y},
+ };
+
+ return cci_multi_reg_write(gc0308->regmap, exposure_reg_seq,
+ ARRAY_SIZE(exposure_reg_seq), NULL);
+}
+
+static int gc0308_set_awb_mode(struct gc0308 *gc0308,
+ enum v4l2_auto_n_preset_white_balance val)
+{
+ const struct gc0308_awb_gains *regs = &gc0308_awb_gains[val];
+ struct cci_reg_sequence awb_reg_seq[] = {
+ {GC0308_AWB_R_GAIN, regs->r},
+ {GC0308_AWB_G_GAIN, regs->g},
+ {GC0308_AWB_B_GAIN, regs->b},
+ };
+ int ret;
+
+ ret = cci_update_bits(gc0308->regmap, GC0308_AAAA_EN,
+ BIT(1), val == V4L2_WHITE_BALANCE_AUTO, NULL);
+ ret = cci_multi_reg_write(gc0308->regmap, awb_reg_seq,
+ ARRAY_SIZE(awb_reg_seq), &ret);
+
+ return ret;
+}
+
+static int gc0308_set_colormode(struct gc0308 *gc0308, enum v4l2_colorfx mode)
+{
+ const struct gc0308_colormode *regs = &gc0308_colormodes[mode];
+ struct cci_reg_sequence colormode_reg_seq[] = {
+ {GC0308_SPECIAL_EFFECT, regs->special_effect},
+ {GC0308_DEBUG_MODE1, regs->dbg_mode1},
+ {GC0308_BLOCK_EN1, regs->block_en1},
+ {GC0308_AEC_MODE3, regs->aec_mode3},
+ {GC0308_EEINTP_MODE_2, regs->eeintp_mode_2},
+ {GC0308_EDGE12_EFFECT, regs->edge12_effect},
+ {GC0308_LUMA_CONTRAST, regs->luma_contrast},
+ {GC0308_CONTRAST_CENTER, regs->contrast_center},
+ {GC0308_FIXED_CB, regs->fixed_cb},
+ {GC0308_FIXED_CR, regs->fixed_cr},
+ };
+
+ return cci_multi_reg_write(gc0308->regmap, colormode_reg_seq,
+ ARRAY_SIZE(colormode_reg_seq), NULL);
+}
+
+static int gc0308_set_power_line_freq(struct gc0308 *gc0308, int frequency)
+{
+ static const struct cci_reg_sequence pwr_line_50hz[] = {
+ {GC0308_ANTI_FLICKER_STEP, 0x0078},
+ {GC0308_EXP_LVL_1, 0x0258},
+ {GC0308_EXP_LVL_2, 0x0348},
+ {GC0308_EXP_LVL_3, 0x04b0},
+ {GC0308_EXP_LVL_4, 0x05a0},
+ };
+ static const struct cci_reg_sequence pwr_line_60hz[] = {
+ {GC0308_ANTI_FLICKER_STEP, 0x0064},
+ {GC0308_EXP_LVL_1, 0x0258},
+ {GC0308_EXP_LVL_2, 0x0384},
+ {GC0308_EXP_LVL_3, 0x04b0},
+ {GC0308_EXP_LVL_4, 0x05dc},
+ };
+
+ switch (frequency) {
+ case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
+ return cci_multi_reg_write(gc0308->regmap, pwr_line_60hz,
+ ARRAY_SIZE(pwr_line_60hz), NULL);
+ case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
+ return cci_multi_reg_write(gc0308->regmap, pwr_line_50hz,
+ ARRAY_SIZE(pwr_line_50hz), NULL);
+ }
+
+ return -EINVAL;
+}
+
+static int gc0308_update_mirror(struct gc0308 *gc0308)
+{
+ u8 regval = 0x00;
+
+ if (gc0308->vflip->val)
+ regval |= BIT(1);
+
+ if (gc0308->hflip->val)
+ regval |= BIT(0);
+
+ return cci_update_bits(gc0308->regmap, GC0308_CISCTL_MODE1,
+ GENMASK(1, 0), regval, NULL);
+}
+
+static int gc0308_update_blanking(struct gc0308 *gc0308)
+{
+ u16 vblank = gc0308->vblank->val;
+ u16 hblank = gc0308->hblank->val;
+ u8 vbhb = ((vblank >> 4) & 0xf0) | ((hblank >> 8) & 0x0f);
+ int ret = 0;
+
+ cci_write(gc0308->regmap, GC0308_VB_HB, vbhb, &ret);
+ cci_write(gc0308->regmap, GC0308_HBLANK, hblank & 0xff, &ret);
+ cci_write(gc0308->regmap, GC0308_VBLANK, vblank & 0xff, &ret);
+
+ return ret;
+}
+
+static int _gc0308_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct gc0308 *gc0308 = container_of(ctrl->handler, struct gc0308, hdl);
+ uint8_t flipval = ctrl->val ? 0xff : 0x00;
+
+ switch (ctrl->id) {
+ case V4L2_CID_HBLANK:
+ case V4L2_CID_VBLANK:
+ return gc0308_update_blanking(gc0308);
+ case V4L2_CID_VFLIP:
+ case V4L2_CID_HFLIP:
+ return gc0308_update_mirror(gc0308);
+ case V4L2_CID_AUTO_WHITE_BALANCE:
+ return cci_update_bits(gc0308->regmap, GC0308_AAAA_EN,
+ BIT(1), flipval, NULL);
+ case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
+ return gc0308_set_awb_mode(gc0308, ctrl->val);
+ case V4L2_CID_POWER_LINE_FREQUENCY:
+ return gc0308_set_power_line_freq(gc0308, ctrl->val);
+ case V4L2_CID_COLORFX:
+ return gc0308_set_colormode(gc0308, ctrl->val);
+ case V4L2_CID_TEST_PATTERN:
+ return cci_update_bits(gc0308->regmap, GC0308_DEBUG_MODE2,
+ GENMASK(1, 0), ctrl->val, NULL);
+ case V4L2_CID_AUTO_EXPOSURE_BIAS:
+ return gc0308_set_exposure(gc0308, ctrl->val);
+ }
+
+ return -EINVAL;
+}
+
+static int gc0308_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct gc0308 *gc0308 = container_of(ctrl->handler, struct gc0308, hdl);
+ int ret;
+
+ if (!pm_runtime_get_if_in_use(gc0308->dev))
+ return 0;
+
+ ret = _gc0308_s_ctrl(ctrl);
+
+ if (ret)
+ dev_err(gc0308->dev, "failed to set control: %d\n", ret);
+
+ pm_runtime_mark_last_busy(gc0308->dev);
+ pm_runtime_put_autosuspend(gc0308->dev);
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops gc0308_ctrl_ops = {
+ .s_ctrl = gc0308_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops gc0308_core_ops = {
+ .log_status = v4l2_ctrl_subdev_log_status,
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = gc0308_g_register,
+ .s_register = gc0308_s_register,
+#endif
+};
+
+static int gc0308_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(gc0308_formats))
+ return -EINVAL;
+
+ code->code = gc0308_formats[code->index].code;
+
+ return 0;
+}
+
+static bool gc0308_is_valid_format(u32 code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(gc0308_formats); i++) {
+ if (gc0308_formats[i].code == code)
+ return true;
+ }
+
+ return false;
+}
+
+static int gc0308_enum_frame_size(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ if (fse->index >= ARRAY_SIZE(gc0308_frame_sizes))
+ return -EINVAL;
+
+ if (!gc0308_is_valid_format(fse->code))
+ return -EINVAL;
+
+ fse->min_width = gc0308_frame_sizes[fse->index].width;
+ fse->max_width = gc0308_frame_sizes[fse->index].width;
+ fse->min_height = gc0308_frame_sizes[fse->index].height;
+ fse->max_height = gc0308_frame_sizes[fse->index].height;
+
+ return 0;
+}
+
+static void gc0308_update_pad_format(const struct gc0308_frame_size *mode,
+ struct v4l2_mbus_framefmt *fmt, u32 code)
+{
+ fmt->width = mode->width;
+ fmt->height = mode->height;
+ fmt->code = code;
+ fmt->field = V4L2_FIELD_NONE;
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+}
+
+static int gc0308_set_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct gc0308 *gc0308 = to_gc0308(sd);
+ const struct gc0308_frame_size *mode;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(gc0308_formats); i++) {
+ if (fmt->format.code == gc0308_formats[i].code)
+ break;
+ }
+
+ if (i >= ARRAY_SIZE(gc0308_formats)) {
+ dev_warn(gc0308->dev, "unsupported format code: %08x\n",
+ fmt->format.code);
+ i = 0;
+ }
+
+ mode = v4l2_find_nearest_size(gc0308_frame_sizes,
+ ARRAY_SIZE(gc0308_frame_sizes), width,
+ height, fmt->format.width,
+ fmt->format.height);
+
+ gc0308_update_pad_format(mode, &fmt->format, gc0308_formats[i].code);
+ *v4l2_subdev_get_pad_format(sd, sd_state, fmt->pad) = fmt->format;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ return 0;
+
+ gc0308->mode.out_format = gc0308_formats[i].regval;
+ gc0308->mode.subsample = mode->subsample;
+ gc0308->mode.width = mode->width;
+ gc0308->mode.height = mode->height;
+
+ return 0;
+}
+
+static int gc0308_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state)
+{
+ struct v4l2_mbus_framefmt *format =
+ v4l2_subdev_get_try_format(sd, sd_state, 0);
+
+ format->width = 640;
+ format->height = 480;
+ format->code = gc0308_formats[0].code;
+ format->colorspace = V4L2_COLORSPACE_SRGB;
+ format->field = V4L2_FIELD_NONE;
+ format->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ format->quantization = V4L2_QUANTIZATION_DEFAULT;
+ format->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_pad_ops gc0308_pad_ops = {
+ .init_cfg = gc0308_init_cfg,
+ .enum_mbus_code = gc0308_enum_mbus_code,
+ .enum_frame_size = gc0308_enum_frame_size,
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = gc0308_set_format,
+};
+
+static int gc0308_set_resolution(struct gc0308 *gc0308, int *ret)
+{
+ struct cci_reg_sequence resolution_regs[] = {
+ {GC0308_SUBSAMPLE, gc0308->mode.subsample},
+ {GC0308_SUBMODE, 0x03},
+ {GC0308_SUB_ROW_N1, 0x00},
+ {GC0308_SUB_ROW_N2, 0x00},
+ {GC0308_SUB_COL_N1, 0x00},
+ {GC0308_SUB_COL_N2, 0x00},
+ {GC0308_CROP_WIN_MODE, 0x80},
+ {GC0308_CROP_WIN_Y1, 0x00},
+ {GC0308_CROP_WIN_X1, 0x00},
+ {GC0308_CROP_WIN_HEIGHT, gc0308->mode.height},
+ {GC0308_CROP_WIN_WIDTH, gc0308->mode.width},
+ };
+
+ return cci_multi_reg_write(gc0308->regmap, resolution_regs,
+ ARRAY_SIZE(resolution_regs), ret);
+}
+
+static int gc0308_start_stream(struct gc0308 *gc0308)
+{
+ int ret, sync_mode;
+
+ ret = pm_runtime_resume_and_get(gc0308->dev);
+ if (ret < 0)
+ return ret;
+
+ cci_multi_reg_write(gc0308->regmap, sensor_default_regs,
+ ARRAY_SIZE(sensor_default_regs), &ret);
+ cci_update_bits(gc0308->regmap, GC0308_OUT_FORMAT,
+ GENMASK(4, 0), gc0308->mode.out_format, &ret);
+ gc0308_set_resolution(gc0308, &ret);
+
+ if (ret) {
+ dev_err(gc0308->dev, "failed to update registers: %d\n", ret);
+ goto disable_pm;
+ }
+
+ ret = __v4l2_ctrl_handler_setup(&gc0308->hdl);
+ if (ret) {
+ dev_err(gc0308->dev, "failed to setup controls\n");
+ goto disable_pm;
+ }
+
+ /* HSYNC/VSYNC polarity */
+ sync_mode = 0x3;
+ if (gc0308->mbus_config & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+ sync_mode &= ~BIT(0);
+ if (gc0308->mbus_config & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+ sync_mode &= ~BIT(1);
+ ret = cci_write(gc0308->regmap, GC0308_SYNC_MODE, sync_mode, NULL);
+ if (ret)
+ goto disable_pm;
+
+ return 0;
+
+disable_pm:
+ pm_runtime_mark_last_busy(gc0308->dev);
+ pm_runtime_put_autosuspend(gc0308->dev);
+ return ret;
+}
+
+static int gc0308_stop_stream(struct gc0308 *gc0308)
+{
+ pm_runtime_mark_last_busy(gc0308->dev);
+ pm_runtime_put_autosuspend(gc0308->dev);
+ return 0;
+}
+
+static int gc0308_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct gc0308 *gc0308 = to_gc0308(sd);
+ struct v4l2_subdev_state *sd_state;
+ int ret;
+
+ sd_state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ if (enable)
+ ret = gc0308_start_stream(gc0308);
+ else
+ ret = gc0308_stop_stream(gc0308);
+
+ v4l2_subdev_unlock_state(sd_state);
+ return ret;
+}
+
+static const struct v4l2_subdev_video_ops gc0308_video_ops = {
+ .s_stream = gc0308_s_stream,
+};
+
+static const struct v4l2_subdev_ops gc0308_subdev_ops = {
+ .core = &gc0308_core_ops,
+ .pad = &gc0308_pad_ops,
+ .video = &gc0308_video_ops,
+};
+
+static int gc0308_bus_config(struct gc0308 *gc0308)
+{
+ struct device *dev = gc0308->dev;
+ struct v4l2_fwnode_endpoint bus_cfg = {
+ .bus_type = V4L2_MBUS_PARALLEL
+ };
+ struct fwnode_handle *ep;
+ int ret;
+
+ ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 0);
+ if (!ep)
+ return -EINVAL;
+
+ ret = v4l2_fwnode_endpoint_parse(ep, &bus_cfg);
+ fwnode_handle_put(ep);
+ if (ret)
+ return ret;
+
+ gc0308->mbus_config = bus_cfg.bus.parallel.flags;
+
+ return 0;
+}
+
+static const char * const gc0308_test_pattern_menu[] = {
+ "Disabled",
+ "Test Image 1",
+ "Test Image 2",
+};
+
+static int gc0308_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct gc0308 *gc0308;
+ unsigned long clkrate;
+ u64 regval;
+ int ret;
+
+ gc0308 = devm_kzalloc(dev, sizeof(*gc0308), GFP_KERNEL);
+ if (!gc0308)
+ return -ENOMEM;
+
+ gc0308->dev = dev;
+ dev_set_drvdata(dev, gc0308);
+
+ ret = gc0308_bus_config(gc0308);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to get bus config\n");
+
+ gc0308->clk = devm_clk_get_optional(dev, NULL);
+ if (IS_ERR(gc0308->clk))
+ return dev_err_probe(dev, PTR_ERR(gc0308->clk),
+ "could not get clk\n");
+
+ gc0308->vdd = devm_regulator_get(dev, "vdd28");
+ if (IS_ERR(gc0308->vdd))
+ return dev_err_probe(dev, PTR_ERR(gc0308->vdd),
+ "failed to get vdd28 regulator\n");
+
+ gc0308->pwdn_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_LOW);
+ if (IS_ERR(gc0308->pwdn_gpio))
+ return dev_err_probe(dev, PTR_ERR(gc0308->pwdn_gpio),
+ "failed to get powerdown gpio\n");
+
+ gc0308->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(gc0308->reset_gpio))
+ return dev_err_probe(dev, PTR_ERR(gc0308->reset_gpio),
+ "failed to get reset gpio\n");
+
+ /*
+ * This is not using devm_cci_regmap_init_i2c(), because the driver
+ * makes use of regmap's pagination feature. The chosen settings are
+ * compatible with the CCI helpers.
+ */
+ gc0308->regmap = devm_regmap_init_i2c(client, &gc0308_regmap_config);
+ if (IS_ERR(gc0308->regmap))
+ return dev_err_probe(dev, PTR_ERR(gc0308->regmap),
+ "failed to init regmap\n");
+
+ v4l2_i2c_subdev_init(&gc0308->sd, client, &gc0308_subdev_ops);
+ gc0308->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ gc0308->sd.flags |= V4L2_SUBDEV_FL_HAS_EVENTS;
+
+ v4l2_ctrl_handler_init(&gc0308->hdl, 11);
+ gc0308->hblank = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_HBLANK, GC0308_HBLANK_MIN,
+ GC0308_HBLANK_MAX, 1,
+ GC0308_HBLANK_DEF);
+ gc0308->vblank = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_VBLANK, GC0308_VBLANK_MIN,
+ GC0308_VBLANK_MAX, 1,
+ GC0308_VBLANK_DEF);
+ gc0308->hflip = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ gc0308->vflip = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops, V4L2_CID_PIXEL_RATE,
+ GC0308_PIXEL_RATE, GC0308_PIXEL_RATE, 1,
+ GC0308_PIXEL_RATE);
+ v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
+ v4l2_ctrl_new_std_menu_items(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(gc0308_test_pattern_menu) - 1,
+ 0, 0, gc0308_test_pattern_menu);
+ v4l2_ctrl_new_std_menu(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
+ 8, ~0x14e, V4L2_WHITE_BALANCE_AUTO);
+ v4l2_ctrl_new_std_menu(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_COLORFX, 8, 0, V4L2_COLORFX_NONE);
+ v4l2_ctrl_new_std_menu(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_POWER_LINE_FREQUENCY,
+ V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
+ ~0x6, V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
+ v4l2_ctrl_new_int_menu(&gc0308->hdl, &gc0308_ctrl_ops,
+ V4L2_CID_AUTO_EXPOSURE_BIAS,
+ ARRAY_SIZE(gc0308_exposure_menu) - 1,
+ ARRAY_SIZE(gc0308_exposure_menu)/2,
+ gc0308_exposure_menu);
+
+ gc0308->sd.ctrl_handler = &gc0308->hdl;
+ if (gc0308->hdl.error) {
+ ret = gc0308->hdl.error;
+ goto fail_ctrl_hdl_cleanup;
+ }
+
+ v4l2_ctrl_cluster(2, &gc0308->hflip);
+ v4l2_ctrl_cluster(2, &gc0308->hblank);
+
+ gc0308->sd.state_lock = gc0308->hdl.lock;
+ gc0308->pad.flags = MEDIA_PAD_FL_SOURCE;
+ gc0308->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+ ret = media_entity_pads_init(&gc0308->sd.entity, 1, &gc0308->pad);
+ if (ret < 0)
+ goto fail_ctrl_hdl_cleanup;
+
+ ret = v4l2_subdev_init_finalize(&gc0308->sd);
+ if (ret)
+ goto fail_media_entity_cleanup;
+
+ ret = gc0308_power_on(dev);
+ if (ret)
+ goto fail_subdev_cleanup;
+
+ if (gc0308->clk) {
+ clkrate = clk_get_rate(gc0308->clk);
+ if (clkrate != 24000000)
+ dev_warn(dev, "unexpected clock rate: %lu\n", clkrate);
+ }
+
+ ret = cci_read(gc0308->regmap, GC0308_CHIP_ID, &regval, NULL);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "failed to read chip ID\n");
+ goto fail_power_off;
+ }
+
+ if (regval != 0x9b) {
+ ret = -EINVAL;
+ dev_err_probe(dev, ret, "invalid chip ID (%02llx)\n", regval);
+ goto fail_power_off;
+ }
+
+ ret = v4l2_async_register_subdev(&gc0308->sd);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to register v4l subdev\n");
+ goto fail_power_off;
+ }
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_set_autosuspend_delay(&client->dev, 1000);
+ pm_runtime_use_autosuspend(&client->dev);
+ pm_runtime_idle(dev);
+
+ return 0;
+
+fail_power_off:
+ gc0308_power_off(dev);
+fail_subdev_cleanup:
+ v4l2_subdev_cleanup(&gc0308->sd);
+fail_media_entity_cleanup:
+ media_entity_cleanup(&gc0308->sd.entity);
+fail_ctrl_hdl_cleanup:
+ v4l2_ctrl_handler_free(&gc0308->hdl);
+ return ret;
+}
+
+static void gc0308_remove(struct i2c_client *client)
+{
+ struct gc0308 *gc0308 = i2c_get_clientdata(client);
+ struct device *dev = &client->dev;
+
+ pm_runtime_get_sync(dev);
+
+ v4l2_async_unregister_subdev(&gc0308->sd);
+ v4l2_ctrl_handler_free(&gc0308->hdl);
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_suspended(dev);
+ pm_runtime_put_noidle(dev);
+ gc0308_power_off(dev);
+}
+
+static const struct dev_pm_ops gc0308_pm_ops = {
+ SET_RUNTIME_PM_OPS(gc0308_power_off, gc0308_power_on, NULL)
+};
+
+static const struct of_device_id gc0308_of_match[] = {
+ { .compatible = "galaxycore,gc0308" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, gc0308_of_match);
+
+static struct i2c_driver gc0308_i2c_driver = {
+ .driver = {
+ .name = "gc0308",
+ .pm = &gc0308_pm_ops,
+ .of_match_table = gc0308_of_match,
+ },
+ .probe = gc0308_probe,
+ .remove = gc0308_remove,
+};
+module_i2c_driver(gc0308_i2c_driver);
+
+MODULE_DESCRIPTION("GalaxyCore GC0308 Camera Driver");
+MODULE_AUTHOR("Sebastian Reichel <[email protected]>");
+MODULE_LICENSE("GPL");
--
2.42.0

2023-10-27 16:32:52

by Sakari Ailus

[permalink] [raw]

Subject: Re: [PATCH v3 0/4] GC0308 Camera Sensor

Hi Sebastian,

On Fri, Oct 27, 2023 at 03:12:00AM +0200, Sebastian Reichel wrote:
> Hi,
>
> I did the following tests done by me on an i.MX6ULL based system [0]:
>
> * v4l2-compliance -u /dev/v4l-subdev1
> - v4l2-compliance 1.24.1, 32 bits, 32-bit time_t
> (from Debian testing)
> - Total for device /dev/v4l-subdev1: 44, Succeeded: 44
> * Using gstreamer + v4l2-ctl
> - Tried 640x480, 320x240, 160x120 YUYV8_2X8 formats
> - Tested effect of all exposed user controls
> * checkpatch does not report any driver issues
> * dt_binding_check does not report anything
>
> Note, that there is another patchset adding GC2145, which
> adds the same vendor prefix. I just included it for completeness,
> since it's needed to avoid checkpatch and dt_binding_check
> warnings.

Thanks for the update.

There's a spelling error I noticed which I'll fix while applying but
otherwise I'm looking forward to have Jacopo's comments on the patch. It
seems good to me.

--
Kind regards,

Sakari Ailus

2023-10-30 08:37:29

by Jacopo Mondi

[permalink] [raw]

Subject: Re: [PATCH v3 4/4] media: i2c: gc0308: new driver

Hi Sebastian

On Fri, Oct 27, 2023 at 03:12:04AM +0200, Sebastian Reichel wrote:
> Introduce new driver for GalaxyCore GC0308, which is a cheap
> 640x480 with an on-chip ISP sensor sold since 2010. Data is
> provided via parallel bus.
>
> Signed-off-by: Sebastian Reichel <[email protected]>
> ---
> MAINTAINERS | 7 +
> drivers/media/i2c/Kconfig | 10 +
> drivers/media/i2c/Makefile | 1 +
> drivers/media/i2c/gc0308.c | 1437 ++++++++++++++++++++++++++++++++++++
> 4 files changed, 1455 insertions(+)
> create mode 100644 drivers/media/i2c/gc0308.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 5f64cd42ff37..f03fd34067d0 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -8627,6 +8627,13 @@ F: drivers/mfd/gateworks-gsc.c
> F: include/linux/mfd/gsc.h
> F: include/linux/platform_data/gsc_hwmon.h
>
> +GC0308 GALAXYCORE CAMERA SENSOR DRIVER
> +M: Sebastian Reichel <[email protected]>
> +L: [email protected]
> +S: Maintained
> +F: Documentation/devicetree/bindings/media/i2c/galaxycore,gc0308.yaml
> +F: drivers/media/i2c/gc0308.c
> +
> GCC PLUGINS
> M: Kees Cook <[email protected]>
> L: [email protected]
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index 74ff833ff48c..d7e52a9d3dd2 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -50,6 +50,16 @@ config VIDEO_AR0521
> To compile this driver as a module, choose M here: the
> module will be called ar0521.
>
> +config VIDEO_GC0308
> + tristate "GalaxyCore GC0308 sensor support"
> + select V4L2_CCI_I2C
> + help
> + This is a Video4Linux2 sensor driver for the GalaxyCore
> + GC0308 camera.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called gc0308.
> +
> config VIDEO_HI556
> tristate "Hynix Hi-556 sensor support"
> help
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index 80b00d39b48f..f03a21f2962a 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -36,6 +36,7 @@ obj-$(CONFIG_VIDEO_DW9719) += dw9719.o
> obj-$(CONFIG_VIDEO_DW9768) += dw9768.o
> obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
> obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/
> +obj-$(CONFIG_VIDEO_GC0308) += gc0308.o
> obj-$(CONFIG_VIDEO_HI556) += hi556.o
> obj-$(CONFIG_VIDEO_HI846) += hi846.o
> obj-$(CONFIG_VIDEO_HI847) += hi847.o
> diff --git a/drivers/media/i2c/gc0308.c b/drivers/media/i2c/gc0308.c
> new file mode 100644
> index 000000000000..3f117ece64ea
> --- /dev/null
> +++ b/drivers/media/i2c/gc0308.c
> @@ -0,0 +1,1437 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for the GalaxyCore GC0308 camera sensor.
> + *
> + * Copyright (c) 2023 Sebastian Reichel <[email protected]>
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/device.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
> +
> +#include <media/v4l2-cci.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-fwnode.h>
> +#include <media/v4l2-subdev.h>
> +
> +/* Analog & CISCTL*/
> +#define GC0308_CHIP_ID CCI_REG8(0x000)
> +#define GC0308_HBLANK CCI_REG8(0x001)
> +#define GC0308_VBLANK CCI_REG8(0x002)
> +#define GC0308_EXP CCI_REG16(0x003)
> +#define GC0308_ROW_START CCI_REG16(0x005)
> +#define GC0308_COL_START CCI_REG16(0x007)
> +#define GC0308_WIN_HEIGHT CCI_REG16(0x009)
> +#define GC0308_WIN_WIDTH CCI_REG16(0x00b)
> +#define GC0308_VS_START_TIME CCI_REG8(0x00d) /* in rows */
> +#define GC0308_VS_END_TIME CCI_REG8(0x00e) /* in rows */
> +#define GC0308_VB_HB CCI_REG8(0x00f)
> +#define GC0308_RSH_WIDTH CCI_REG8(0x010)
> +#define GC0308_TSP_WIDTH CCI_REG8(0x011)
> +#define GC0308_SAMPLE_HOLD_DELAY CCI_REG8(0x012)
> +#define GC0308_ROW_TAIL_WIDTH CCI_REG8(0x013)
> +#define GC0308_CISCTL_MODE1 CCI_REG8(0x014)
> +#define GC0308_CISCTL_MODE2 CCI_REG8(0x015)
> +#define GC0308_CISCTL_MODE3 CCI_REG8(0x016)
> +#define GC0308_CISCTL_MODE4 CCI_REG8(0x017)
> +#define GC0308_ANALOG_MODE1 CCI_REG8(0x01a)
> +#define GC0308_ANALOG_MODE2 CCI_REG8(0x01b)
> +#define GC0308_HRST_RSG_V18 CCI_REG8(0x01c)
> +#define GC0308_VREF_V25 CCI_REG8(0x01d)
> +#define GC0308_ADC_R CCI_REG8(0x01e)
> +#define GC0308_PAD_DRV CCI_REG8(0x01f)
> +#define GC0308_SOFT_RESET CCI_REG8(0x0fe)
> +
> +/* ISP */
> +#define GC0308_BLOCK_EN1 CCI_REG8(0x020)
> +#define GC0308_BLOCK_EN2 CCI_REG8(0x021)
> +#define GC0308_AAAA_EN CCI_REG8(0x022)
> +#define GC0308_SPECIAL_EFFECT CCI_REG8(0x023)
> +#define GC0308_OUT_FORMAT CCI_REG8(0x024)
> +#define GC0308_OUT_EN CCI_REG8(0x025)
> +#define GC0308_SYNC_MODE CCI_REG8(0x026)
> +#define GC0308_CLK_DIV_MODE CCI_REG8(0x028)
> +#define GC0308_BYPASS_MODE CCI_REG8(0x029)
> +#define GC0308_CLK_GATING CCI_REG8(0x02a)
> +#define GC0308_DITHER_MODE CCI_REG8(0x02b)
> +#define GC0308_DITHER_BIT CCI_REG8(0x02c)
> +#define GC0308_DEBUG_MODE1 CCI_REG8(0x02d)
> +#define GC0308_DEBUG_MODE2 CCI_REG8(0x02e)
> +#define GC0308_DEBUG_MODE3 CCI_REG8(0x02f)
> +#define GC0308_CROP_WIN_MODE CCI_REG8(0x046)
> +#define GC0308_CROP_WIN_Y1 CCI_REG8(0x047)
> +#define GC0308_CROP_WIN_X1 CCI_REG8(0x048)
> +#define GC0308_CROP_WIN_HEIGHT CCI_REG16(0x049)
> +#define GC0308_CROP_WIN_WIDTH CCI_REG16(0x04b)
> +
> +/* BLK */
> +#define GC0308_BLK_MODE CCI_REG8(0x030)
> +#define GC0308_BLK_LIMIT_VAL CCI_REG8(0x031)
> +#define GC0308_GLOBAL_OFF CCI_REG8(0x032)
> +#define GC0308_CURRENT_R_OFF CCI_REG8(0x033)
> +#define GC0308_CURRENT_G_OFF CCI_REG8(0x034)
> +#define GC0308_CURRENT_B_OFF CCI_REG8(0x035)
> +#define GC0308_CURRENT_R_DARK_CURRENT CCI_REG8(0x036)
> +#define GC0308_CURRENT_G_DARK_CURRENT CCI_REG8(0x037)
> +#define GC0308_CURRENT_B_DARK_CURRENT CCI_REG8(0x038)
> +#define GC0308_EXP_RATE_DARKC CCI_REG8(0x039)
> +#define GC0308_OFF_SUBMODE CCI_REG8(0x03a)
> +#define GC0308_DARKC_SUBMODE CCI_REG8(0x03b)
> +#define GC0308_MANUAL_G1_OFF CCI_REG8(0x03c)
> +#define GC0308_MANUAL_R1_OFF CCI_REG8(0x03d)
> +#define GC0308_MANUAL_B2_OFF CCI_REG8(0x03e)
> +#define GC0308_MANUAL_G2_OFF CCI_REG8(0x03f)
> +
> +/* PREGAIN */
> +#define GC0308_GLOBAL_GAIN CCI_REG8(0x050)
> +#define GC0308_AUTO_PREGAIN CCI_REG8(0x051)
> +#define GC0308_AUTO_POSTGAIN CCI_REG8(0x052)
> +#define GC0308_CHANNEL_GAIN_G1 CCI_REG8(0x053)
> +#define GC0308_CHANNEL_GAIN_R CCI_REG8(0x054)
> +#define GC0308_CHANNEL_GAIN_B CCI_REG8(0x055)
> +#define GC0308_CHANNEL_GAIN_G2 CCI_REG8(0x056)
> +#define GC0308_R_RATIO CCI_REG8(0x057)
> +#define GC0308_G_RATIO CCI_REG8(0x058)
> +#define GC0308_B_RATIO CCI_REG8(0x059)
> +#define GC0308_AWB_R_GAIN CCI_REG8(0x05a)
> +#define GC0308_AWB_G_GAIN CCI_REG8(0x05b)
> +#define GC0308_AWB_B_GAIN CCI_REG8(0x05c)
> +#define GC0308_LSC_DEC_LVL1 CCI_REG8(0x05d)
> +#define GC0308_LSC_DEC_LVL2 CCI_REG8(0x05e)
> +#define GC0308_LSC_DEC_LVL3 CCI_REG8(0x05f)
> +
> +/* DNDD */
> +#define GC0308_DN_MODE_EN CCI_REG8(0x060)
> +#define GC0308_DN_MODE_RATIO CCI_REG8(0x061)
> +#define GC0308_DN_BILAT_B_BASE CCI_REG8(0x062)
> +#define GC0308_DN_B_INCR CCI_REG8(0x063)
> +#define GC0308_DN_BILAT_N_BASE CCI_REG8(0x064)
> +#define GC0308_DN_N_INCR CCI_REG8(0x065)
> +#define GC0308_DD_DARK_BRIGHT_TH CCI_REG8(0x066)
> +#define GC0308_DD_FLAT_TH CCI_REG8(0x067)
> +#define GC0308_DD_LIMIT CCI_REG8(0x068)
> +
> +/* ASDE - Auto Saturation De-noise and Edge-Enhancement */
> +#define GC0308_ASDE_GAIN_TRESH CCI_REG8(0x069)
> +#define GC0308_ASDE_GAIN_MODE CCI_REG8(0x06a)
> +#define GC0308_ASDE_DN_SLOPE CCI_REG8(0x06b)
> +#define GC0308_ASDE_DD_BRIGHT CCI_REG8(0x06c)
> +#define GC0308_ASDE_DD_LIMIT CCI_REG8(0x06d)
> +#define GC0308_ASDE_AUTO_EE1 CCI_REG8(0x06e)
> +#define GC0308_ASDE_AUTO_EE2 CCI_REG8(0x06f)
> +#define GC0308_ASDE_AUTO_SAT_DEC_SLOPE CCI_REG8(0x070)
> +#define GC0308_ASDE_AUTO_SAT_LOW_LIMIT CCI_REG8(0x071)
> +
> +/* INTPEE - Interpolation and Edge-Enhancement */
> +#define GC0308_EEINTP_MODE_1 CCI_REG8(0x072)
> +#define GC0308_EEINTP_MODE_2 CCI_REG8(0x073)
> +#define GC0308_DIRECTION_TH1 CCI_REG8(0x074)
> +#define GC0308_DIRECTION_TH2 CCI_REG8(0x075)
> +#define GC0308_DIFF_HV_TI_TH CCI_REG8(0x076)
> +#define GC0308_EDGE12_EFFECT CCI_REG8(0x077)
> +#define GC0308_EDGE_POS_RATIO CCI_REG8(0x078)
> +#define GC0308_EDGE1_MINMAX CCI_REG8(0x079)
> +#define GC0308_EDGE2_MINMAX CCI_REG8(0x07a)
> +#define GC0308_EDGE12_TH CCI_REG8(0x07b)
> +#define GC0308_EDGE_MAX CCI_REG8(0x07c)
> +
> +/* ABB - Auto Black Balance */
> +#define GC0308_ABB_MODE CCI_REG8(0x080)
> +#define GC0308_ABB_TARGET_AVGH CCI_REG8(0x081)
> +#define GC0308_ABB_TARGET_AVGL CCI_REG8(0x082)
> +#define GC0308_ABB_LIMIT_VAL CCI_REG8(0x083)
> +#define GC0308_ABB_SPEED CCI_REG8(0x084)
> +#define GC0308_CURR_R_BLACK_LVL CCI_REG8(0x085)
> +#define GC0308_CURR_G_BLACK_LVL CCI_REG8(0x086)
> +#define GC0308_CURR_B_BLACK_LVL CCI_REG8(0x087)
> +#define GC0308_CURR_R_BLACK_FACTOR CCI_REG8(0x088)
> +#define GC0308_CURR_G_BLACK_FACTOR CCI_REG8(0x089)
> +#define GC0308_CURR_B_BLACK_FACTOR CCI_REG8(0x08a)
> +
> +/* LSC - Lens Shading Correction */
> +#define GC0308_LSC_RED_B2 CCI_REG8(0x08b)
> +#define GC0308_LSC_GREEN_B2 CCI_REG8(0x08c)
> +#define GC0308_LSC_BLUE_B2 CCI_REG8(0x08d)
> +#define GC0308_LSC_RED_B4 CCI_REG8(0x08e)
> +#define GC0308_LSC_GREEN_B4 CCI_REG8(0x08f)
> +#define GC0308_LSC_BLUE_B4 CCI_REG8(0x090)
> +#define GC0308_LSC_ROW_CENTER CCI_REG8(0x091)
> +#define GC0308_LSC_COL_CENTER CCI_REG8(0x092)
> +
> +/* CC - Channel Coefficient */
> +#define GC0308_CC_MATRIX_C11 CCI_REG8(0x093)
> +#define GC0308_CC_MATRIX_C12 CCI_REG8(0x094)
> +#define GC0308_CC_MATRIX_C13 CCI_REG8(0x095)
> +#define GC0308_CC_MATRIX_C21 CCI_REG8(0x096)
> +#define GC0308_CC_MATRIX_C22 CCI_REG8(0x097)
> +#define GC0308_CC_MATRIX_C23 CCI_REG8(0x098)
> +#define GC0308_CC_MATRIX_C41 CCI_REG8(0x09c)
> +#define GC0308_CC_MATRIX_C42 CCI_REG8(0x09d)
> +#define GC0308_CC_MATRIX_C43 CCI_REG8(0x09e)
> +
> +/* GAMMA */
> +#define GC0308_GAMMA_OUT0 CCI_REG8(0x09f)
> +#define GC0308_GAMMA_OUT1 CCI_REG8(0x0a0)
> +#define GC0308_GAMMA_OUT2 CCI_REG8(0x0a1)
> +#define GC0308_GAMMA_OUT3 CCI_REG8(0x0a2)
> +#define GC0308_GAMMA_OUT4 CCI_REG8(0x0a3)
> +#define GC0308_GAMMA_OUT5 CCI_REG8(0x0a4)
> +#define GC0308_GAMMA_OUT6 CCI_REG8(0x0a5)
> +#define GC0308_GAMMA_OUT7 CCI_REG8(0x0a6)
> +#define GC0308_GAMMA_OUT8 CCI_REG8(0x0a7)
> +#define GC0308_GAMMA_OUT9 CCI_REG8(0x0a8)
> +#define GC0308_GAMMA_OUT10 CCI_REG8(0x0a9)
> +#define GC0308_GAMMA_OUT11 CCI_REG8(0x0aa)
> +#define GC0308_GAMMA_OUT12 CCI_REG8(0x0ab)
> +#define GC0308_GAMMA_OUT13 CCI_REG8(0x0ac)
> +#define GC0308_GAMMA_OUT14 CCI_REG8(0x0ad)
> +#define GC0308_GAMMA_OUT15 CCI_REG8(0x0ae)
> +#define GC0308_GAMMA_OUT16 CCI_REG8(0x0af)
> +
> +/* YCP */
> +#define GC0308_GLOBAL_SATURATION CCI_REG8(0x0b0)
> +#define GC0308_SATURATION_CB CCI_REG8(0x0b1)
> +#define GC0308_SATURATION_CR CCI_REG8(0x0b2)
> +#define GC0308_LUMA_CONTRAST CCI_REG8(0x0b3)
> +#define GC0308_CONTRAST_CENTER CCI_REG8(0x0b4)
> +#define GC0308_LUMA_OFFSET CCI_REG8(0x0b5)
> +#define GC0308_SKIN_CB_CENTER CCI_REG8(0x0b6)
> +#define GC0308_SKIN_CR_CENTER CCI_REG8(0x0b7)
> +#define GC0308_SKIN_RADIUS_SQUARE CCI_REG8(0x0b8)
> +#define GC0308_SKIN_BRIGHTNESS CCI_REG8(0x0b9)
> +#define GC0308_FIXED_CB CCI_REG8(0x0ba)
> +#define GC0308_FIXED_CR CCI_REG8(0x0bb)
> +#define GC0308_EDGE_DEC_SA CCI_REG8(0x0bd)
> +#define GC0308_AUTO_GRAY_MODE CCI_REG8(0x0be)
> +#define GC0308_SATURATION_SUB_STRENGTH CCI_REG8(0x0bf)
> +#define GC0308_Y_GAMMA_OUT0 CCI_REG8(0x0c0)
> +#define GC0308_Y_GAMMA_OUT1 CCI_REG8(0x0c1)
> +#define GC0308_Y_GAMMA_OUT2 CCI_REG8(0x0c2)
> +#define GC0308_Y_GAMMA_OUT3 CCI_REG8(0x0c3)
> +#define GC0308_Y_GAMMA_OUT4 CCI_REG8(0x0c4)
> +#define GC0308_Y_GAMMA_OUT5 CCI_REG8(0x0c5)
> +#define GC0308_Y_GAMMA_OUT6 CCI_REG8(0x0c6)
> +#define GC0308_Y_GAMMA_OUT7 CCI_REG8(0x0c7)
> +#define GC0308_Y_GAMMA_OUT8 CCI_REG8(0x0c8)
> +#define GC0308_Y_GAMMA_OUT9 CCI_REG8(0x0c9)
> +#define GC0308_Y_GAMMA_OUT10 CCI_REG8(0x0ca)
> +#define GC0308_Y_GAMMA_OUT11 CCI_REG8(0x0cb)
> +#define GC0308_Y_GAMMA_OUT12 CCI_REG8(0x0cc)
> +
> +/* AEC - Automatic Exposure Control */
> +#define GC0308_AEC_MODE1 CCI_REG8(0x0d0)
> +#define GC0308_AEC_MODE2 CCI_REG8(0x0d1)
> +#define GC0308_AEC_MODE3 CCI_REG8(0x0d2)
> +#define GC0308_AEC_TARGET_Y CCI_REG8(0x0d3)
> +#define GC0308_Y_AVG CCI_REG8(0x0d4)
> +#define GC0308_AEC_HIGH_LOW_RANGE CCI_REG8(0x0d5)
> +#define GC0308_AEC_IGNORE CCI_REG8(0x0d6)
> +#define GC0308_AEC_LIMIT_HIGH_RANGE CCI_REG8(0x0d7)
> +#define GC0308_AEC_R_OFFSET CCI_REG8(0x0d9)
> +#define GC0308_AEC_GB_OFFSET CCI_REG8(0x0da)
> +#define GC0308_AEC_SLOW_MARGIN CCI_REG8(0x0db)
> +#define GC0308_AEC_FAST_MARGIN CCI_REG8(0x0dc)
> +#define GC0308_AEC_EXP_CHANGE_GAIN CCI_REG8(0x0dd)
> +#define GC0308_AEC_STEP2_SUNLIGHT CCI_REG8(0x0de)
> +#define GC0308_AEC_I_FRAMES CCI_REG8(0x0df)
> +#define GC0308_AEC_I_STOP_L_MARGIN CCI_REG8(0x0e0)
> +#define GC0308_AEC_I_STOP_MARGIN CCI_REG8(0x0e1)
> +#define GC0308_ANTI_FLICKER_STEP CCI_REG16(0x0e2)
> +#define GC0308_EXP_LVL_1 CCI_REG16(0x0e4)
> +#define GC0308_EXP_LVL_2 CCI_REG16(0x0e6)
> +#define GC0308_EXP_LVL_3 CCI_REG16(0x0e8)
> +#define GC0308_EXP_LVL_4 CCI_REG16(0x0ea)
> +#define GC0308_MAX_EXP_LVL CCI_REG8(0x0ec)
> +#define GC0308_EXP_MIN_L CCI_REG8(0x0ed)
> +#define GC0308_MAX_POST_DF_GAIN CCI_REG8(0x0ee)
> +#define GC0308_MAX_PRE_DG_GAIN CCI_REG8(0x0ef)
> +
> +/* ABS */
> +#define GC0308_ABS_RANGE_COMP CCI_REG8(0x0f0)
> +#define GC0308_ABS_STOP_MARGIN CCI_REG8(0x0f1)
> +#define GC0308_Y_S_COMP CCI_REG8(0x0f2)
> +#define GC0308_Y_STRETCH_LIMIT CCI_REG8(0x0f3)
> +#define GC0308_Y_TILT CCI_REG8(0x0f4)
> +#define GC0308_Y_STRETCH CCI_REG8(0x0f5)
> +
> +/* Measure Window */
> +#define GC0308_BIG_WIN_X0 CCI_REG8(0x0f7)
> +#define GC0308_BIG_WIN_Y0 CCI_REG8(0x0f8)
> +#define GC0308_BIG_WIN_X1 CCI_REG8(0x0f9)
> +#define GC0308_BIG_WIN_Y1 CCI_REG8(0x0fa)
> +#define GC0308_DIFF_Y_BIG_THD CCI_REG8(0x0fb)
> +
> +/* OUT Module (P1) */
> +#define GC0308_CLOSE_FRAME_EN CCI_REG8(0x150)
> +#define GC0308_CLOSE_FRAME_NUM1 CCI_REG8(0x151)
> +#define GC0308_CLOSE_FRAME_NUM2 CCI_REG8(0x152)
> +#define GC0308_BAYER_MODE CCI_REG8(0x153)
> +#define GC0308_SUBSAMPLE CCI_REG8(0x154)
> +#define GC0308_SUBMODE CCI_REG8(0x155)
> +#define GC0308_SUB_ROW_N1 CCI_REG8(0x156)
> +#define GC0308_SUB_ROW_N2 CCI_REG8(0x157)
> +#define GC0308_SUB_COL_N1 CCI_REG8(0x158)
> +#define GC0308_SUB_COL_N2 CCI_REG8(0x159)
> +
> +/* AWB (P1) - Auto White Balance */
> +#define GC0308_AWB_RGB_HIGH_LOW CCI_REG8(0x100)
> +#define GC0308_AWB_Y_TO_C_DIFF2 CCI_REG8(0x102)
> +#define GC0308_AWB_C_MAX CCI_REG8(0x104)
> +#define GC0308_AWB_C_INTER CCI_REG8(0x105)
> +#define GC0308_AWB_C_INTER2 CCI_REG8(0x106)
> +#define GC0308_AWB_C_MAX_BIG CCI_REG8(0x108)
> +#define GC0308_AWB_Y_HIGH CCI_REG8(0x109)
> +#define GC0308_AWB_NUMBER_LIMIT CCI_REG8(0x10a)
> +#define GC0308_KWIN_RATIO CCI_REG8(0x10b)
> +#define GC0308_KWIN_THD CCI_REG8(0x10c)
> +#define GC0308_LIGHT_GAIN_RANGE CCI_REG8(0x10d)
> +#define GC0308_SMALL_WIN_WIDTH_STEP CCI_REG8(0x10e)
> +#define GC0308_SMALL_WIN_HEIGHT_STEP CCI_REG8(0x10f)
> +#define GC0308_AWB_YELLOW_TH CCI_REG8(0x110)
> +#define GC0308_AWB_MODE CCI_REG8(0x111)
> +#define GC0308_AWB_ADJUST_SPEED CCI_REG8(0x112)
> +#define GC0308_AWB_EVERY_N CCI_REG8(0x113)
> +#define GC0308_R_AVG_USE CCI_REG8(0x1d0)
> +#define GC0308_G_AVG_USE CCI_REG8(0x1d1)
> +#define GC0308_B_AVG_USE CCI_REG8(0x1d2)
> +
> +#define GC0308_HBLANK_MIN 0x021
> +#define GC0308_HBLANK_MAX 0xfff
> +#define GC0308_HBLANK_DEF 0x040
> +
> +#define GC0308_VBLANK_MIN 0x000
> +#define GC0308_VBLANK_MAX 0xfff
> +#define GC0308_VBLANK_DEF 0x020
> +
> +#define GC0308_PIXEL_RATE 24000000
> +
> +/*
> + * frame_time = (BT + height + 8) * row_time
> + * width = 640 (driver does not change window size)
> + * height = 480 (driver does not change window size)
> + * row_time = HBLANK + SAMPLE_HOLD_DELAY + width + 8 + 4
> + *
> + * When EXP_TIME > (BT + height):
> + * BT = EXP_TIME - height - 8 - VS_START_TIME + VS_END_TIME
> + * else:
> + * BT = VBLANK + VS_START_TIME + VS_END_TIME
> + *
> + * max is 30 FPS
> + *
> + * In my tests frame rate mostly depends on exposure time. Unfortuantely
> + * it's unclear how this is calculated exactly. Also since we enable AEC,
> + * the frame times vary depending on ambient light conditions.
> + */
> +#define GC0308_FRAME_RATE_MAX 30
> +
> +enum gc0308_exp_val {
> + GC0308_EXP_M4 = 0,
> + GC0308_EXP_M3,
> + GC0308_EXP_M2,
> + GC0308_EXP_M1,
> + GC0308_EXP_0,
> + GC0308_EXP_P1,
> + GC0308_EXP_P2,
> + GC0308_EXP_P3,
> + GC0308_EXP_P4,
> +};
> +
> +static const s64 gc0308_exposure_menu[] = {
> + -4, -3, -2, -1, 0, 1, 2, 3, 4
> +};
> +
> +struct gc0308_exposure {
> + u8 luma_offset;
> + u8 aec_target_y;
> +};
> +
> +#define GC0308_EXPOSURE(luma_offset_reg, aec_target_y_reg) \
> + { .luma_offset = luma_offset_reg, .aec_target_y = aec_target_y_reg }
> +
> +static const struct gc0308_exposure gc0308_exposure_values[] = {
> + [GC0308_EXP_M4] = GC0308_EXPOSURE(0xc0, 0x30),
> + [GC0308_EXP_M3] = GC0308_EXPOSURE(0xd0, 0x38),
> + [GC0308_EXP_M2] = GC0308_EXPOSURE(0xe0, 0x40),
> + [GC0308_EXP_M1] = GC0308_EXPOSURE(0xf0, 0x48),
> + [GC0308_EXP_0] = GC0308_EXPOSURE(0x08, 0x50),
> + [GC0308_EXP_P1] = GC0308_EXPOSURE(0x10, 0x5c),
> + [GC0308_EXP_P2] = GC0308_EXPOSURE(0x20, 0x60),
> + [GC0308_EXP_P3] = GC0308_EXPOSURE(0x30, 0x68),
> + [GC0308_EXP_P4] = GC0308_EXPOSURE(0x40, 0x70),
> +};
> +
> +struct gc0308_awb_gains {
> + u8 r;
> + u8 g;
> + u8 b;
> +};
> +
> +#define GC0308_AWB_GAINS(red, green, blue) \
> + { .r = red, .g = green, .b = blue }
> +
> +static const struct gc0308_awb_gains gc0308_awb_gains[] = {
> + [V4L2_WHITE_BALANCE_AUTO] = GC0308_AWB_GAINS(0x56, 0x40, 0x4a),
> + [V4L2_WHITE_BALANCE_CLOUDY] = GC0308_AWB_GAINS(0x8c, 0x50, 0x40),
> + [V4L2_WHITE_BALANCE_DAYLIGHT] = GC0308_AWB_GAINS(0x74, 0x52, 0x40),
> + [V4L2_WHITE_BALANCE_INCANDESCENT] = GC0308_AWB_GAINS(0x48, 0x40, 0x5c),
> + [V4L2_WHITE_BALANCE_FLUORESCENT] = GC0308_AWB_GAINS(0x40, 0x42, 0x50),
> +};
> +
> +struct gc0308_format {
> + u32 code;
> + u8 regval;
> +};
> +
> +#define GC0308_FORMAT(v4l2_code, gc0308_regval) \
> + { .code = v4l2_code, .regval = gc0308_regval }
> +
> +static const struct gc0308_format gc0308_formats[] = {
> + GC0308_FORMAT(MEDIA_BUS_FMT_UYVY8_2X8, 0x00),
> + GC0308_FORMAT(MEDIA_BUS_FMT_VYUY8_2X8, 0x01),
> + GC0308_FORMAT(MEDIA_BUS_FMT_YUYV8_2X8, 0x02),
> + GC0308_FORMAT(MEDIA_BUS_FMT_YVYU8_2X8, 0x03),
> + GC0308_FORMAT(MEDIA_BUS_FMT_RGB565_2X8_BE, 0x06),
> + GC0308_FORMAT(MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE, 0x07),
> + GC0308_FORMAT(MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE, 0x09),
> +};
> +
> +struct gc0308_frame_size {
> + u8 subsample;
> + u32 width;
> + u32 height;
> +};
> +
> +#define GC0308_FRAME_SIZE(s, w, h) \
> + { .subsample = s, .width = w, .height = h }
> +
> +static const struct gc0308_frame_size gc0308_frame_sizes[] = {
> + GC0308_FRAME_SIZE(0x11, 640, 480),
> + GC0308_FRAME_SIZE(0x22, 320, 240),
> + GC0308_FRAME_SIZE(0x44, 160, 120),
> +};
> +
> +struct gc0308_mode_registers {
> + u8 out_format;
> + u8 subsample;
> + u16 width;
> + u16 height;
> +};
> +
> +struct gc0308 {
> + struct v4l2_subdev sd;
> + struct v4l2_ctrl_handler hdl;
> + struct media_pad pad;
> + struct device *dev;
> + struct clk *clk;
> + struct regmap *regmap;
> + struct regulator *vdd;
> + struct gpio_desc *pwdn_gpio;
> + struct gpio_desc *reset_gpio;
> + unsigned int mbus_config;
> + struct gc0308_mode_registers mode;
> + struct {
> + /* mirror cluster */
> + struct v4l2_ctrl *hflip;
> + struct v4l2_ctrl *vflip;
> + };
> + struct {
> + /* blanking cluster */
> + struct v4l2_ctrl *hblank;
> + struct v4l2_ctrl *vblank;
> + };
> +};
> +
> +static inline struct gc0308 *to_gc0308(struct v4l2_subdev *sd)
> +{
> + return container_of(sd, struct gc0308, sd);
> +}
> +
> +static const struct regmap_range_cfg gc0308_ranges[] = {
> + {
> + .range_min = 0x0000,
> + .range_max = 0x01ff,
> + .selector_reg = 0xfe,
> + .selector_mask = 0x01,
> + .selector_shift = 0x00,
> + .window_start = 0x00,
> + .window_len = 0x100,
> + },
> +};
> +
> +static const struct regmap_config gc0308_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> + .reg_format_endian = REGMAP_ENDIAN_BIG,
> + .max_register = 0x1ff,
> + .ranges = gc0308_ranges,
> + .num_ranges = ARRAY_SIZE(gc0308_ranges),
> + .disable_locking = true,
> +};
> +
> +static const struct cci_reg_sequence sensor_default_regs[] = {
> + {GC0308_VB_HB, 0x00},
> + {GC0308_HBLANK, 0x40},
> + {GC0308_VBLANK, 0x20},
> + {GC0308_EXP, 0x0258},
> + {GC0308_AWB_R_GAIN, 0x56},
> + {GC0308_AWB_G_GAIN, 0x40},
> + {GC0308_AWB_B_GAIN, 0x4a},
> + {GC0308_ANTI_FLICKER_STEP, 0x0078},
> + {GC0308_EXP_LVL_1, 0x0258},
> + {GC0308_EXP_LVL_2, 0x0258},
> + {GC0308_EXP_LVL_3, 0x0258},
> + {GC0308_EXP_LVL_4, 0x0ea6},
> + {GC0308_MAX_EXP_LVL, 0x20},
> + {GC0308_ROW_START, 0x0000},
> + {GC0308_COL_START, 0x0000},
> + {GC0308_WIN_HEIGHT, 488},
> + {GC0308_WIN_WIDTH, 648},
> + {GC0308_VS_START_TIME, 0x02},
> + {GC0308_VS_END_TIME, 0x02},
> + {GC0308_RSH_WIDTH, 0x22},
> + {GC0308_TSP_WIDTH, 0x0d},
> + {GC0308_SAMPLE_HOLD_DELAY, 0x50},
> + {GC0308_ROW_TAIL_WIDTH, 0x0f},
> + {GC0308_CISCTL_MODE1, 0x10},
> + {GC0308_CISCTL_MODE2, 0x0a},
> + {GC0308_CISCTL_MODE3, 0x05},
> + {GC0308_CISCTL_MODE4, 0x01},
> + {CCI_REG8(0x018), 0x44}, /* undocumented */
> + {CCI_REG8(0x019), 0x44}, /* undocumented */
> + {GC0308_ANALOG_MODE1, 0x2a},
> + {GC0308_ANALOG_MODE2, 0x00},
> + {GC0308_HRST_RSG_V18, 0x49},
> + {GC0308_VREF_V25, 0x9a},
> + {GC0308_ADC_R, 0x61},
> + {GC0308_PAD_DRV, 0x01}, /* drv strength: pclk=4mA */
> + {GC0308_BLOCK_EN1, 0x7f},
> + {GC0308_BLOCK_EN2, 0xfa},
> + {GC0308_AAAA_EN, 0x57},
> + {GC0308_OUT_FORMAT, 0xa2}, /* YCbYCr */
> + {GC0308_OUT_EN, 0x0f},
> + {GC0308_SYNC_MODE, 0x03},
> + {GC0308_CLK_DIV_MODE, 0x00},
> + {GC0308_DEBUG_MODE1, 0x0a},
> + {GC0308_DEBUG_MODE2, 0x00},
> + {GC0308_DEBUG_MODE3, 0x01},
> + {GC0308_BLK_MODE, 0xf7},
> + {GC0308_BLK_LIMIT_VAL, 0x50},
> + {GC0308_GLOBAL_OFF, 0x00},
> + {GC0308_CURRENT_R_OFF, 0x28},
> + {GC0308_CURRENT_G_OFF, 0x2a},
> + {GC0308_CURRENT_B_OFF, 0x28},
> + {GC0308_EXP_RATE_DARKC, 0x04},
> + {GC0308_OFF_SUBMODE, 0x20},
> + {GC0308_DARKC_SUBMODE, 0x20},
> + {GC0308_MANUAL_G1_OFF, 0x00},
> + {GC0308_MANUAL_R1_OFF, 0x00},
> + {GC0308_MANUAL_B2_OFF, 0x00},
> + {GC0308_MANUAL_G2_OFF, 0x00},
> + {GC0308_GLOBAL_GAIN, 0x14},
> + {GC0308_AUTO_POSTGAIN, 0x41},
> + {GC0308_CHANNEL_GAIN_G1, 0x80},
> + {GC0308_CHANNEL_GAIN_R, 0x80},
> + {GC0308_CHANNEL_GAIN_B, 0x80},
> + {GC0308_CHANNEL_GAIN_G2, 0x80},
> + {GC0308_LSC_RED_B2, 0x20},
> + {GC0308_LSC_GREEN_B2, 0x20},
> + {GC0308_LSC_BLUE_B2, 0x20},
> + {GC0308_LSC_RED_B4, 0x14},
> + {GC0308_LSC_GREEN_B4, 0x10},
> + {GC0308_LSC_BLUE_B4, 0x14},
> + {GC0308_LSC_ROW_CENTER, 0x3c},
> + {GC0308_LSC_COL_CENTER, 0x50},
> + {GC0308_LSC_DEC_LVL1, 0x12},
> + {GC0308_LSC_DEC_LVL2, 0x1a},
> + {GC0308_LSC_DEC_LVL3, 0x24},
> + {GC0308_DN_MODE_EN, 0x07},
> + {GC0308_DN_MODE_RATIO, 0x15},
> + {GC0308_DN_BILAT_B_BASE, 0x08},
> + {GC0308_DN_BILAT_N_BASE, 0x03},
> + {GC0308_DD_DARK_BRIGHT_TH, 0xe8},
> + {GC0308_DD_FLAT_TH, 0x86},
> + {GC0308_DD_LIMIT, 0x82},
> + {GC0308_ASDE_GAIN_TRESH, 0x18},
> + {GC0308_ASDE_GAIN_MODE, 0x0f},
> + {GC0308_ASDE_DN_SLOPE, 0x00},
> + {GC0308_ASDE_DD_BRIGHT, 0x5f},
> + {GC0308_ASDE_DD_LIMIT, 0x8f},
> + {GC0308_ASDE_AUTO_EE1, 0x55},
> + {GC0308_ASDE_AUTO_EE2, 0x38},
> + {GC0308_ASDE_AUTO_SAT_DEC_SLOPE, 0x15},
> + {GC0308_ASDE_AUTO_SAT_LOW_LIMIT, 0x33},
> + {GC0308_EEINTP_MODE_1, 0xdc},
> + {GC0308_EEINTP_MODE_2, 0x00},
> + {GC0308_DIRECTION_TH1, 0x02},
> + {GC0308_DIRECTION_TH2, 0x3f},
> + {GC0308_DIFF_HV_TI_TH, 0x02},
> + {GC0308_EDGE12_EFFECT, 0x38},
> + {GC0308_EDGE_POS_RATIO, 0x88},
> + {GC0308_EDGE1_MINMAX, 0x81},
> + {GC0308_EDGE2_MINMAX, 0x81},
> + {GC0308_EDGE12_TH, 0x22},
> + {GC0308_EDGE_MAX, 0xff},
> + {GC0308_CC_MATRIX_C11, 0x48},
> + {GC0308_CC_MATRIX_C12, 0x02},
> + {GC0308_CC_MATRIX_C13, 0x07},
> + {GC0308_CC_MATRIX_C21, 0xe0},
> + {GC0308_CC_MATRIX_C22, 0x40},
> + {GC0308_CC_MATRIX_C23, 0xf0},
> + {GC0308_SATURATION_CB, 0x40},
> + {GC0308_SATURATION_CR, 0x40},
> + {GC0308_LUMA_CONTRAST, 0x40},
> + {GC0308_SKIN_CB_CENTER, 0xe0},
> + {GC0308_EDGE_DEC_SA, 0x38},
> + {GC0308_AUTO_GRAY_MODE, 0x36},
> + {GC0308_AEC_MODE1, 0xcb},
> + {GC0308_AEC_MODE2, 0x10},
> + {GC0308_AEC_MODE3, 0x90},
> + {GC0308_AEC_TARGET_Y, 0x48},
> + {GC0308_AEC_HIGH_LOW_RANGE, 0xf2},
> + {GC0308_AEC_IGNORE, 0x16},
> + {GC0308_AEC_SLOW_MARGIN, 0x92},
> + {GC0308_AEC_FAST_MARGIN, 0xa5},
> + {GC0308_AEC_I_FRAMES, 0x23},
> + {GC0308_AEC_R_OFFSET, 0x00},
> + {GC0308_AEC_GB_OFFSET, 0x00},
> + {GC0308_AEC_I_STOP_L_MARGIN, 0x09},
> + {GC0308_EXP_MIN_L, 0x04},
> + {GC0308_MAX_POST_DF_GAIN, 0xa0},
> + {GC0308_MAX_PRE_DG_GAIN, 0x40},
> + {GC0308_ABB_MODE, 0x03},
> + {GC0308_GAMMA_OUT0, 0x10},
> + {GC0308_GAMMA_OUT1, 0x20},
> + {GC0308_GAMMA_OUT2, 0x38},
> + {GC0308_GAMMA_OUT3, 0x4e},
> + {GC0308_GAMMA_OUT4, 0x63},
> + {GC0308_GAMMA_OUT5, 0x76},
> + {GC0308_GAMMA_OUT6, 0x87},
> + {GC0308_GAMMA_OUT7, 0xa2},
> + {GC0308_GAMMA_OUT8, 0xb8},
> + {GC0308_GAMMA_OUT9, 0xca},
> + {GC0308_GAMMA_OUT10, 0xd8},
> + {GC0308_GAMMA_OUT11, 0xe3},
> + {GC0308_GAMMA_OUT12, 0xeb},
> + {GC0308_GAMMA_OUT13, 0xf0},
> + {GC0308_GAMMA_OUT14, 0xf8},
> + {GC0308_GAMMA_OUT15, 0xfd},
> + {GC0308_GAMMA_OUT16, 0xff},
> + {GC0308_Y_GAMMA_OUT0, 0x00},
> + {GC0308_Y_GAMMA_OUT1, 0x10},
> + {GC0308_Y_GAMMA_OUT2, 0x1c},
> + {GC0308_Y_GAMMA_OUT3, 0x30},
> + {GC0308_Y_GAMMA_OUT4, 0x43},
> + {GC0308_Y_GAMMA_OUT5, 0x54},
> + {GC0308_Y_GAMMA_OUT6, 0x65},
> + {GC0308_Y_GAMMA_OUT7, 0x75},
> + {GC0308_Y_GAMMA_OUT8, 0x93},
> + {GC0308_Y_GAMMA_OUT9, 0xb0},
> + {GC0308_Y_GAMMA_OUT10, 0xcb},
> + {GC0308_Y_GAMMA_OUT11, 0xe6},
> + {GC0308_Y_GAMMA_OUT12, 0xff},
> + {GC0308_ABS_RANGE_COMP, 0x02},
> + {GC0308_ABS_STOP_MARGIN, 0x01},
> + {GC0308_Y_S_COMP, 0x02},
> + {GC0308_Y_STRETCH_LIMIT, 0x30},
> + {GC0308_BIG_WIN_X0, 0x12},
> + {GC0308_BIG_WIN_Y0, 0x0a},
> + {GC0308_BIG_WIN_X1, 0x9f},
> + {GC0308_BIG_WIN_Y1, 0x78},
> + {GC0308_AWB_RGB_HIGH_LOW, 0xf5},
> + {GC0308_AWB_Y_TO_C_DIFF2, 0x20},
> + {GC0308_AWB_C_MAX, 0x10},
> + {GC0308_AWB_C_INTER, 0x08},
> + {GC0308_AWB_C_INTER2, 0x20},
> + {GC0308_AWB_C_MAX_BIG, 0x0a},
> + {GC0308_AWB_NUMBER_LIMIT, 0xa0},
> + {GC0308_KWIN_RATIO, 0x60},
> + {GC0308_KWIN_THD, 0x08},
> + {GC0308_SMALL_WIN_WIDTH_STEP, 0x44},
> + {GC0308_SMALL_WIN_HEIGHT_STEP, 0x32},
> + {GC0308_AWB_YELLOW_TH, 0x41},
> + {GC0308_AWB_MODE, 0x37},
> + {GC0308_AWB_ADJUST_SPEED, 0x22},
> + {GC0308_AWB_EVERY_N, 0x19},
> + {CCI_REG8(0x114), 0x44}, /* AWB set1 */
> + {CCI_REG8(0x115), 0x44}, /* AWB set1 */
> + {CCI_REG8(0x116), 0xc2}, /* AWB set1 */
> + {CCI_REG8(0x117), 0xa8}, /* AWB set1 */
> + {CCI_REG8(0x118), 0x18}, /* AWB set1 */
> + {CCI_REG8(0x119), 0x50}, /* AWB set1 */
> + {CCI_REG8(0x11a), 0xd8}, /* AWB set1 */
> + {CCI_REG8(0x11b), 0xf5}, /* AWB set1 */
> + {CCI_REG8(0x170), 0x40}, /* AWB set2 */
> + {CCI_REG8(0x171), 0x58}, /* AWB set2 */
> + {CCI_REG8(0x172), 0x30}, /* AWB set2 */
> + {CCI_REG8(0x173), 0x48}, /* AWB set2 */
> + {CCI_REG8(0x174), 0x20}, /* AWB set2 */
> + {CCI_REG8(0x175), 0x60}, /* AWB set2 */
> + {CCI_REG8(0x177), 0x20}, /* AWB set2 */
> + {CCI_REG8(0x178), 0x32}, /* AWB set2 */
> + {CCI_REG8(0x130), 0x03}, /* undocumented */
> + {CCI_REG8(0x131), 0x40}, /* undocumented */
> + {CCI_REG8(0x132), 0x10}, /* undocumented */
> + {CCI_REG8(0x133), 0xe0}, /* undocumented */
> + {CCI_REG8(0x134), 0xe0}, /* undocumented */
> + {CCI_REG8(0x135), 0x00}, /* undocumented */
> + {CCI_REG8(0x136), 0x80}, /* undocumented */
> + {CCI_REG8(0x137), 0x00}, /* undocumented */
> + {CCI_REG8(0x138), 0x04}, /* undocumented */
> + {CCI_REG8(0x139), 0x09}, /* undocumented */
> + {CCI_REG8(0x13a), 0x12}, /* undocumented */
> + {CCI_REG8(0x13b), 0x1c}, /* undocumented */
> + {CCI_REG8(0x13c), 0x28}, /* undocumented */
> + {CCI_REG8(0x13d), 0x31}, /* undocumented */
> + {CCI_REG8(0x13e), 0x44}, /* undocumented */
> + {CCI_REG8(0x13f), 0x57}, /* undocumented */
> + {CCI_REG8(0x140), 0x6c}, /* undocumented */
> + {CCI_REG8(0x141), 0x81}, /* undocumented */
> + {CCI_REG8(0x142), 0x94}, /* undocumented */
> + {CCI_REG8(0x143), 0xa7}, /* undocumented */
> + {CCI_REG8(0x144), 0xb8}, /* undocumented */
> + {CCI_REG8(0x145), 0xd6}, /* undocumented */
> + {CCI_REG8(0x146), 0xee}, /* undocumented */
> + {CCI_REG8(0x147), 0x0d}, /* undocumented */
> + {CCI_REG8(0x162), 0xf7}, /* undocumented */
> + {CCI_REG8(0x163), 0x68}, /* undocumented */
> + {CCI_REG8(0x164), 0xd3}, /* undocumented */
> + {CCI_REG8(0x165), 0xd3}, /* undocumented */
> + {CCI_REG8(0x166), 0x60}, /* undocumented */
> +};
> +
> +struct gc0308_colormode {
> + u8 special_effect;
> + u8 dbg_mode1;
> + u8 block_en1;
> + u8 aec_mode3;
> + u8 eeintp_mode_2;
> + u8 edge12_effect;
> + u8 luma_contrast;
> + u8 contrast_center;
> + u8 fixed_cb;
> + u8 fixed_cr;
> +};
> +
> +#define GC0308_COLOR_FX(reg_special_effect, reg_dbg_mode1, reg_block_en1, \
> + reg_aec_mode3, reg_eeintp_mode_2, reg_edge12_effect, \
> + reg_luma_contrast, reg_contrast_center, \
> + reg_fixed_cb, reg_fixed_cr) \
> + { \
> + .special_effect = reg_special_effect, \
> + .dbg_mode1 = reg_dbg_mode1, \
> + .block_en1 = reg_block_en1, \
> + .aec_mode3 = reg_aec_mode3, \
> + .eeintp_mode_2 = reg_eeintp_mode_2, \
> + .edge12_effect = reg_edge12_effect, \
> + .luma_contrast = reg_luma_contrast, \
> + .contrast_center = reg_contrast_center, \
> + .fixed_cb = reg_fixed_cb, \
> + .fixed_cr = reg_fixed_cr, \
> + }
> +
> +static const struct gc0308_colormode gc0308_colormodes[] = {
> + [V4L2_COLORFX_NONE] =
> + GC0308_COLOR_FX(0x00, 0x0a, 0xff, 0x90, 0x00,
> + 0x54, 0x3c, 0x80, 0x00, 0x00),
> + [V4L2_COLORFX_BW] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x00,
> + 0x54, 0x40, 0x80, 0x00, 0x00),
> + [V4L2_COLORFX_SEPIA] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x00,
> + 0x38, 0x40, 0x80, 0xd0, 0x28),
> + [V4L2_COLORFX_NEGATIVE] =
> + GC0308_COLOR_FX(0x01, 0x0a, 0xff, 0x90, 0x00,
> + 0x38, 0x40, 0x80, 0x00, 0x00),
> + [V4L2_COLORFX_EMBOSS] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xbf, 0x10, 0x01,
> + 0x38, 0x40, 0x80, 0x00, 0x00),
> + [V4L2_COLORFX_SKETCH] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x10, 0x80,
> + 0x38, 0x80, 0x90, 0x00, 0x00),
> + [V4L2_COLORFX_SKY_BLUE] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x00,
> + 0x38, 0x40, 0x80, 0x50, 0xe0),
> + [V4L2_COLORFX_GRASS_GREEN] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x01,
> + 0x38, 0x40, 0x80, 0xc0, 0xc0),
> + [V4L2_COLORFX_SKIN_WHITEN] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xbf, 0x10, 0x01,
> + 0x38, 0x60, 0x40, 0x00, 0x00),
> +};
> +
> +static int gc0308_power_on(struct device *dev)
> +{
> + struct gc0308 *gc0308 = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = regulator_enable(gc0308->vdd);
> + if (ret)
> + return ret;
> +
> + ret = clk_prepare_enable(gc0308->clk);
> + if (ret)
> + goto clk_fail;
> +
> + gpiod_set_value_cansleep(gc0308->pwdn_gpio, 0);
> + usleep_range(10000, 20000);
> +
> + gpiod_set_value_cansleep(gc0308->reset_gpio, 1);
> + usleep_range(10000, 20000);
> + gpiod_set_value_cansleep(gc0308->reset_gpio, 0);
> + msleep(30);
> +
> + return 0;
> +
> +clk_fail:
> + regulator_disable(gc0308->vdd);
> + return ret;
> +}
> +
> +static int gc0308_power_off(struct device *dev)
> +{
> + struct gc0308 *gc0308 = dev_get_drvdata(dev);
> +
> + gpiod_set_value_cansleep(gc0308->pwdn_gpio, 1);
> + clk_disable_unprepare(gc0308->clk);
> + regulator_disable(gc0308->vdd);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> +static int gc0308_g_register(struct v4l2_subdev *sd,
> + struct v4l2_dbg_register *reg)
> +{
> + struct gc0308 *gc0308 = to_gc0308(sd);
> +
> + return cci_read(gc0308->regmap, CCI_REG8(reg->reg), &reg->val, NULL);
> +}
> +
> +static int gc0308_s_register(struct v4l2_subdev *sd,
> + const struct v4l2_dbg_register *reg)
> +{
> + struct gc0308 *gc0308 = to_gc0308(sd);
> +
> + return cci_write(gc0308->regmap, CCI_REG8(reg->reg), reg->val, NULL);
> +}
> +#endif
> +
> +static int gc0308_set_exposure(struct gc0308 *gc0308, enum gc0308_exp_val exp)
> +{
> + const struct gc0308_exposure *regs = &gc0308_exposure_values[exp];
> + struct cci_reg_sequence exposure_reg_seq[] = {
> + {GC0308_LUMA_OFFSET, regs->luma_offset},
> + {GC0308_AEC_TARGET_Y, regs->aec_target_y},
> + };
> +
> + return cci_multi_reg_write(gc0308->regmap, exposure_reg_seq,
> + ARRAY_SIZE(exposure_reg_seq), NULL);
> +}
> +
> +static int gc0308_set_awb_mode(struct gc0308 *gc0308,
> + enum v4l2_auto_n_preset_white_balance val)
> +{
> + const struct gc0308_awb_gains *regs = &gc0308_awb_gains[val];
> + struct cci_reg_sequence awb_reg_seq[] = {
> + {GC0308_AWB_R_GAIN, regs->r},
> + {GC0308_AWB_G_GAIN, regs->g},
> + {GC0308_AWB_B_GAIN, regs->b},
> + };
> + int ret;
> +
> + ret = cci_update_bits(gc0308->regmap, GC0308_AAAA_EN,
> + BIT(1), val == V4L2_WHITE_BALANCE_AUTO, NULL);
> + ret = cci_multi_reg_write(gc0308->regmap, awb_reg_seq,
> + ARRAY_SIZE(awb_reg_seq), &ret);
> +
> + return ret;
> +}
> +
> +static int gc0308_set_colormode(struct gc0308 *gc0308, enum v4l2_colorfx mode)
> +{
> + const struct gc0308_colormode *regs = &gc0308_colormodes[mode];
> + struct cci_reg_sequence colormode_reg_seq[] = {
> + {GC0308_SPECIAL_EFFECT, regs->special_effect},
> + {GC0308_DEBUG_MODE1, regs->dbg_mode1},
> + {GC0308_BLOCK_EN1, regs->block_en1},
> + {GC0308_AEC_MODE3, regs->aec_mode3},
> + {GC0308_EEINTP_MODE_2, regs->eeintp_mode_2},
> + {GC0308_EDGE12_EFFECT, regs->edge12_effect},
> + {GC0308_LUMA_CONTRAST, regs->luma_contrast},
> + {GC0308_CONTRAST_CENTER, regs->contrast_center},
> + {GC0308_FIXED_CB, regs->fixed_cb},
> + {GC0308_FIXED_CR, regs->fixed_cr},
> + };
> +
> + return cci_multi_reg_write(gc0308->regmap, colormode_reg_seq,
> + ARRAY_SIZE(colormode_reg_seq), NULL);
> +}
> +
> +static int gc0308_set_power_line_freq(struct gc0308 *gc0308, int frequency)
> +{
> + static const struct cci_reg_sequence pwr_line_50hz[] = {
> + {GC0308_ANTI_FLICKER_STEP, 0x0078},
> + {GC0308_EXP_LVL_1, 0x0258},
> + {GC0308_EXP_LVL_2, 0x0348},
> + {GC0308_EXP_LVL_3, 0x04b0},
> + {GC0308_EXP_LVL_4, 0x05a0},
> + };
> + static const struct cci_reg_sequence pwr_line_60hz[] = {
> + {GC0308_ANTI_FLICKER_STEP, 0x0064},
> + {GC0308_EXP_LVL_1, 0x0258},
> + {GC0308_EXP_LVL_2, 0x0384},
> + {GC0308_EXP_LVL_3, 0x04b0},
> + {GC0308_EXP_LVL_4, 0x05dc},
> + };
> +
> + switch (frequency) {
> + case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
> + return cci_multi_reg_write(gc0308->regmap, pwr_line_60hz,
> + ARRAY_SIZE(pwr_line_60hz), NULL);
> + case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
> + return cci_multi_reg_write(gc0308->regmap, pwr_line_50hz,
> + ARRAY_SIZE(pwr_line_50hz), NULL);
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int gc0308_update_mirror(struct gc0308 *gc0308)
> +{
> + u8 regval = 0x00;
> +
> + if (gc0308->vflip->val)
> + regval |= BIT(1);
> +
> + if (gc0308->hflip->val)
> + regval |= BIT(0);
> +
> + return cci_update_bits(gc0308->regmap, GC0308_CISCTL_MODE1,
> + GENMASK(1, 0), regval, NULL);
> +}
> +
> +static int gc0308_update_blanking(struct gc0308 *gc0308)
> +{
> + u16 vblank = gc0308->vblank->val;
> + u16 hblank = gc0308->hblank->val;
> + u8 vbhb = ((vblank >> 4) & 0xf0) | ((hblank >> 8) & 0x0f);
> + int ret = 0;
> +
> + cci_write(gc0308->regmap, GC0308_VB_HB, vbhb, &ret);
> + cci_write(gc0308->regmap, GC0308_HBLANK, hblank & 0xff, &ret);
> + cci_write(gc0308->regmap, GC0308_VBLANK, vblank & 0xff, &ret);
> +
> + return ret;
> +}
> +
> +static int _gc0308_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct gc0308 *gc0308 = container_of(ctrl->handler, struct gc0308, hdl);
> + uint8_t flipval = ctrl->val ? 0xff : 0x00;
> +
> + switch (ctrl->id) {
> + case V4L2_CID_HBLANK:
> + case V4L2_CID_VBLANK:
> + return gc0308_update_blanking(gc0308);
> + case V4L2_CID_VFLIP:
> + case V4L2_CID_HFLIP:
> + return gc0308_update_mirror(gc0308);
> + case V4L2_CID_AUTO_WHITE_BALANCE:
> + return cci_update_bits(gc0308->regmap, GC0308_AAAA_EN,
> + BIT(1), flipval, NULL);
> + case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
> + return gc0308_set_awb_mode(gc0308, ctrl->val);
> + case V4L2_CID_POWER_LINE_FREQUENCY:
> + return gc0308_set_power_line_freq(gc0308, ctrl->val);
> + case V4L2_CID_COLORFX:
> + return gc0308_set_colormode(gc0308, ctrl->val);
> + case V4L2_CID_TEST_PATTERN:
> + return cci_update_bits(gc0308->regmap, GC0308_DEBUG_MODE2,
> + GENMASK(1, 0), ctrl->val, NULL);
> + case V4L2_CID_AUTO_EXPOSURE_BIAS:
> + return gc0308_set_exposure(gc0308, ctrl->val);
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int gc0308_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct gc0308 *gc0308 = container_of(ctrl->handler, struct gc0308, hdl);
> + int ret;
> +
> + if (!pm_runtime_get_if_in_use(gc0308->dev))
> + return 0;
> +
> + ret = _gc0308_s_ctrl(ctrl);
> +
> + if (ret)
> + dev_err(gc0308->dev, "failed to set control: %d\n", ret);
> +
> + pm_runtime_mark_last_busy(gc0308->dev);
> + pm_runtime_put_autosuspend(gc0308->dev);
> +
> + return ret;
> +}
> +
> +static const struct v4l2_ctrl_ops gc0308_ctrl_ops = {
> + .s_ctrl = gc0308_s_ctrl,
> +};
> +
> +static const struct v4l2_subdev_core_ops gc0308_core_ops = {
> + .log_status = v4l2_ctrl_subdev_log_status,
> + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> + .g_register = gc0308_g_register,
> + .s_register = gc0308_s_register,
> +#endif
> +};
> +
> +static int gc0308_enum_mbus_code(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_mbus_code_enum *code)
> +{
> + if (code->index >= ARRAY_SIZE(gc0308_formats))
> + return -EINVAL;
> +
> + code->code = gc0308_formats[code->index].code;
> +
> + return 0;
> +}
> +
> +static bool gc0308_is_valid_format(u32 code)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(gc0308_formats); i++) {
> + if (gc0308_formats[i].code == code)
> + return true;
> + }
> +
> + return false;
> +}
> +
> +static int gc0308_enum_frame_size(struct v4l2_subdev *subdev,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_frame_size_enum *fse)
> +{
> + if (fse->index >= ARRAY_SIZE(gc0308_frame_sizes))
> + return -EINVAL;
> +
> + if (!gc0308_is_valid_format(fse->code))
> + return -EINVAL;
> +
> + fse->min_width = gc0308_frame_sizes[fse->index].width;
> + fse->max_width = gc0308_frame_sizes[fse->index].width;
> + fse->min_height = gc0308_frame_sizes[fse->index].height;
> + fse->max_height = gc0308_frame_sizes[fse->index].height;
> +
> + return 0;
> +}
> +
> +static void gc0308_update_pad_format(const struct gc0308_frame_size *mode,
> + struct v4l2_mbus_framefmt *fmt, u32 code)
> +{
> + fmt->width = mode->width;
> + fmt->height = mode->height;
> + fmt->code = code;
> + fmt->field = V4L2_FIELD_NONE;
> + fmt->colorspace = V4L2_COLORSPACE_SRGB;
> +}
> +
> +static int gc0308_set_format(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_format *fmt)
> +{
> + struct gc0308 *gc0308 = to_gc0308(sd);
> + const struct gc0308_frame_size *mode;
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(gc0308_formats); i++) {
> + if (fmt->format.code == gc0308_formats[i].code)
> + break;
> + }
> +
> + if (i >= ARRAY_SIZE(gc0308_formats)) {
> + dev_warn(gc0308->dev, "unsupported format code: %08x\n",
> + fmt->format.code);
> + i = 0;
> + }

This looks very similar to gc0308_is_valid_format()

> +
> + mode = v4l2_find_nearest_size(gc0308_frame_sizes,
> + ARRAY_SIZE(gc0308_frame_sizes), width,
> + height, fmt->format.width,
> + fmt->format.height);
> +
> + gc0308_update_pad_format(mode, &fmt->format, gc0308_formats[i].code);
> + *v4l2_subdev_get_pad_format(sd, sd_state, fmt->pad) = fmt->format;
> +
> + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
> + return 0;
> +
> + gc0308->mode.out_format = gc0308_formats[i].regval;
> + gc0308->mode.subsample = mode->subsample;
> + gc0308->mode.width = mode->width;
> + gc0308->mode.height = mode->height;
> +
> + return 0;
> +}
> +
> +static int gc0308_init_cfg(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state)
> +{
> + struct v4l2_mbus_framefmt *format =
> + v4l2_subdev_get_try_format(sd, sd_state, 0);
> +
> + format->width = 640;
> + format->height = 480;
> + format->code = gc0308_formats[0].code;
> + format->colorspace = V4L2_COLORSPACE_SRGB;
> + format->field = V4L2_FIELD_NONE;
> + format->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
> + format->quantization = V4L2_QUANTIZATION_DEFAULT;
> + format->xfer_func = V4L2_XFER_FUNC_DEFAULT;
> +
> + return 0;
> +}
> +
> +static const struct v4l2_subdev_pad_ops gc0308_pad_ops = {
> + .init_cfg = gc0308_init_cfg,
> + .enum_mbus_code = gc0308_enum_mbus_code,
> + .enum_frame_size = gc0308_enum_frame_size,
> + .get_fmt = v4l2_subdev_get_fmt,
> + .set_fmt = gc0308_set_format,
> +};
> +
> +static int gc0308_set_resolution(struct gc0308 *gc0308, int *ret)
> +{
> + struct cci_reg_sequence resolution_regs[] = {
> + {GC0308_SUBSAMPLE, gc0308->mode.subsample},
> + {GC0308_SUBMODE, 0x03},
> + {GC0308_SUB_ROW_N1, 0x00},
> + {GC0308_SUB_ROW_N2, 0x00},
> + {GC0308_SUB_COL_N1, 0x00},
> + {GC0308_SUB_COL_N2, 0x00},
> + {GC0308_CROP_WIN_MODE, 0x80},
> + {GC0308_CROP_WIN_Y1, 0x00},
> + {GC0308_CROP_WIN_X1, 0x00},
> + {GC0308_CROP_WIN_HEIGHT, gc0308->mode.height},
> + {GC0308_CROP_WIN_WIDTH, gc0308->mode.width},
> + };
> +
> + return cci_multi_reg_write(gc0308->regmap, resolution_regs,
> + ARRAY_SIZE(resolution_regs), ret);
> +}
> +
> +static int gc0308_start_stream(struct gc0308 *gc0308)
> +{
> + int ret, sync_mode;
> +
> + ret = pm_runtime_resume_and_get(gc0308->dev);
> + if (ret < 0)
> + return ret;
> +
> + cci_multi_reg_write(gc0308->regmap, sensor_default_regs,
> + ARRAY_SIZE(sensor_default_regs), &ret);
> + cci_update_bits(gc0308->regmap, GC0308_OUT_FORMAT,
> + GENMASK(4, 0), gc0308->mode.out_format, &ret);
> + gc0308_set_resolution(gc0308, &ret);
> +
> + if (ret) {
> + dev_err(gc0308->dev, "failed to update registers: %d\n", ret);
> + goto disable_pm;
> + }
> +
> + ret = __v4l2_ctrl_handler_setup(&gc0308->hdl);
> + if (ret) {
> + dev_err(gc0308->dev, "failed to setup controls\n");
> + goto disable_pm;
> + }
> +
> + /* HSYNC/VSYNC polarity */
> + sync_mode = 0x3;
> + if (gc0308->mbus_config & V4L2_MBUS_VSYNC_ACTIVE_LOW)
> + sync_mode &= ~BIT(0);
> + if (gc0308->mbus_config & V4L2_MBUS_HSYNC_ACTIVE_LOW)
> + sync_mode &= ~BIT(1);
> + ret = cci_write(gc0308->regmap, GC0308_SYNC_MODE, sync_mode, NULL);
> + if (ret)
> + goto disable_pm;
> +
> + return 0;
> +
> +disable_pm:
> + pm_runtime_mark_last_busy(gc0308->dev);
> + pm_runtime_put_autosuspend(gc0308->dev);
> + return ret;
> +}
> +
> +static int gc0308_stop_stream(struct gc0308 *gc0308)
> +{
> + pm_runtime_mark_last_busy(gc0308->dev);
> + pm_runtime_put_autosuspend(gc0308->dev);
> + return 0;
> +}
> +
> +static int gc0308_s_stream(struct v4l2_subdev *sd, int enable)
> +{
> + struct gc0308 *gc0308 = to_gc0308(sd);
> + struct v4l2_subdev_state *sd_state;
> + int ret;
> +
> + sd_state = v4l2_subdev_lock_and_get_active_state(sd);
> +
> + if (enable)
> + ret = gc0308_start_stream(gc0308);
> + else
> + ret = gc0308_stop_stream(gc0308);
> +
> + v4l2_subdev_unlock_state(sd_state);
> + return ret;
> +}
> +
> +static const struct v4l2_subdev_video_ops gc0308_video_ops = {
> + .s_stream = gc0308_s_stream,
> +};
> +
> +static const struct v4l2_subdev_ops gc0308_subdev_ops = {
> + .core = &gc0308_core_ops,
> + .pad = &gc0308_pad_ops,
> + .video = &gc0308_video_ops,
> +};
> +
> +static int gc0308_bus_config(struct gc0308 *gc0308)
> +{
> + struct device *dev = gc0308->dev;
> + struct v4l2_fwnode_endpoint bus_cfg = {
> + .bus_type = V4L2_MBUS_PARALLEL
> + };
> + struct fwnode_handle *ep;
> + int ret;
> +
> + ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 0);
> + if (!ep)
> + return -EINVAL;
> +
> + ret = v4l2_fwnode_endpoint_parse(ep, &bus_cfg);
> + fwnode_handle_put(ep);
> + if (ret)
> + return ret;
> +
> + gc0308->mbus_config = bus_cfg.bus.parallel.flags;
> +
> + return 0;
> +}
> +
> +static const char * const gc0308_test_pattern_menu[] = {
> + "Disabled",
> + "Test Image 1",
> + "Test Image 2",
> +};
> +
> +static int gc0308_probe(struct i2c_client *client)
> +{
> + struct device *dev = &client->dev;
> + struct gc0308 *gc0308;
> + unsigned long clkrate;
> + u64 regval;
> + int ret;
> +
> + gc0308 = devm_kzalloc(dev, sizeof(*gc0308), GFP_KERNEL);
> + if (!gc0308)
> + return -ENOMEM;
> +
> + gc0308->dev = dev;
> + dev_set_drvdata(dev, gc0308);
> +
> + ret = gc0308_bus_config(gc0308);
> + if (ret)
> + return dev_err_probe(dev, ret, "failed to get bus config\n");
> +
> + gc0308->clk = devm_clk_get_optional(dev, NULL);
> + if (IS_ERR(gc0308->clk))
> + return dev_err_probe(dev, PTR_ERR(gc0308->clk),
> + "could not get clk\n");
> +
> + gc0308->vdd = devm_regulator_get(dev, "vdd28");
> + if (IS_ERR(gc0308->vdd))
> + return dev_err_probe(dev, PTR_ERR(gc0308->vdd),
> + "failed to get vdd28 regulator\n");
> +
> + gc0308->pwdn_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_LOW);
> + if (IS_ERR(gc0308->pwdn_gpio))
> + return dev_err_probe(dev, PTR_ERR(gc0308->pwdn_gpio),
> + "failed to get powerdown gpio\n");
> +
> + gc0308->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> + if (IS_ERR(gc0308->reset_gpio))
> + return dev_err_probe(dev, PTR_ERR(gc0308->reset_gpio),
> + "failed to get reset gpio\n");
> +
> + /*
> + * This is not using devm_cci_regmap_init_i2c(), because the driver
> + * makes use of regmap's pagination feature. The chosen settings are
> + * compatible with the CCI helpers.
> + */
> + gc0308->regmap = devm_regmap_init_i2c(client, &gc0308_regmap_config);
> + if (IS_ERR(gc0308->regmap))
> + return dev_err_probe(dev, PTR_ERR(gc0308->regmap),
> + "failed to init regmap\n");
> +
> + v4l2_i2c_subdev_init(&gc0308->sd, client, &gc0308_subdev_ops);
> + gc0308->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> + gc0308->sd.flags |= V4L2_SUBDEV_FL_HAS_EVENTS;
> +
> + v4l2_ctrl_handler_init(&gc0308->hdl, 11);
> + gc0308->hblank = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_HBLANK, GC0308_HBLANK_MIN,
> + GC0308_HBLANK_MAX, 1,
> + GC0308_HBLANK_DEF);
> + gc0308->vblank = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_VBLANK, GC0308_VBLANK_MIN,
> + GC0308_VBLANK_MAX, 1,
> + GC0308_VBLANK_DEF);
> + gc0308->hflip = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_HFLIP, 0, 1, 1, 0);
> + gc0308->vflip = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_VFLIP, 0, 1, 1, 0);
> + v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops, V4L2_CID_PIXEL_RATE,
> + GC0308_PIXEL_RATE, GC0308_PIXEL_RATE, 1,
> + GC0308_PIXEL_RATE);
> + v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
> + v4l2_ctrl_new_std_menu_items(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_TEST_PATTERN,
> + ARRAY_SIZE(gc0308_test_pattern_menu) - 1,
> + 0, 0, gc0308_test_pattern_menu);
> + v4l2_ctrl_new_std_menu(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
> + 8, ~0x14e, V4L2_WHITE_BALANCE_AUTO);
> + v4l2_ctrl_new_std_menu(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_COLORFX, 8, 0, V4L2_COLORFX_NONE);
> + v4l2_ctrl_new_std_menu(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_POWER_LINE_FREQUENCY,
> + V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
> + ~0x6, V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
> + v4l2_ctrl_new_int_menu(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_AUTO_EXPOSURE_BIAS,
> + ARRAY_SIZE(gc0308_exposure_menu) - 1,
> + ARRAY_SIZE(gc0308_exposure_menu)/2,
> + gc0308_exposure_menu);
> +
> + gc0308->sd.ctrl_handler = &gc0308->hdl;
> + if (gc0308->hdl.error) {
> + ret = gc0308->hdl.error;
> + goto fail_ctrl_hdl_cleanup;
> + }
> +
> + v4l2_ctrl_cluster(2, &gc0308->hflip);
> + v4l2_ctrl_cluster(2, &gc0308->hblank);
> +
> + gc0308->sd.state_lock = gc0308->hdl.lock;
> + gc0308->pad.flags = MEDIA_PAD_FL_SOURCE;
> + gc0308->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> + ret = media_entity_pads_init(&gc0308->sd.entity, 1, &gc0308->pad);
> + if (ret < 0)
> + goto fail_ctrl_hdl_cleanup;
> +
> + ret = v4l2_subdev_init_finalize(&gc0308->sd);
> + if (ret)
> + goto fail_media_entity_cleanup;
> +
> + ret = gc0308_power_on(dev);
> + if (ret)
> + goto fail_subdev_cleanup;
> +
> + if (gc0308->clk) {
> + clkrate = clk_get_rate(gc0308->clk);
> + if (clkrate != 24000000)
> + dev_warn(dev, "unexpected clock rate: %lu\n", clkrate);
> + }
> +
> + ret = cci_read(gc0308->regmap, GC0308_CHIP_ID, &regval, NULL);
> + if (ret < 0) {
> + dev_err_probe(dev, ret, "failed to read chip ID\n");
> + goto fail_power_off;
> + }
> +
> + if (regval != 0x9b) {
> + ret = -EINVAL;
> + dev_err_probe(dev, ret, "invalid chip ID (%02llx)\n", regval);
> + goto fail_power_off;
> + }
> +
> + ret = v4l2_async_register_subdev(&gc0308->sd);
> + if (ret) {
> + dev_err_probe(dev, ret, "failed to register v4l subdev\n");
> + goto fail_power_off;
> + }
> +
> + pm_runtime_set_active(dev);
> + pm_runtime_enable(dev);
> + pm_runtime_set_autosuspend_delay(&client->dev, 1000);
> + pm_runtime_use_autosuspend(&client->dev);
> + pm_runtime_idle(dev);
> +
> + return 0;
> +
> +fail_power_off:
> + gc0308_power_off(dev);
> +fail_subdev_cleanup:
> + v4l2_subdev_cleanup(&gc0308->sd);
> +fail_media_entity_cleanup:
> + media_entity_cleanup(&gc0308->sd.entity);
> +fail_ctrl_hdl_cleanup:
> + v4l2_ctrl_handler_free(&gc0308->hdl);
> + return ret;
> +}
> +
> +static void gc0308_remove(struct i2c_client *client)
> +{
> + struct gc0308 *gc0308 = i2c_get_clientdata(client);
> + struct device *dev = &client->dev;
> +
> + pm_runtime_get_sync(dev);

Uh, I've never seen this call in a _remove before. Is it intentional ?

Apart these two nits the rest is good! thanks for addressing the
comments received on the previous version.

Reviewed-by: Jacopo Mondi <[email protected]>

Thanks
j

> +
> + v4l2_async_unregister_subdev(&gc0308->sd);
> + v4l2_ctrl_handler_free(&gc0308->hdl);
> +
> + pm_runtime_disable(dev);
> + pm_runtime_set_suspended(dev);
> + pm_runtime_put_noidle(dev);
> + gc0308_power_off(dev);
> +}
> +
> +static const struct dev_pm_ops gc0308_pm_ops = {
> + SET_RUNTIME_PM_OPS(gc0308_power_off, gc0308_power_on, NULL)
> +};
> +
> +static const struct of_device_id gc0308_of_match[] = {
> + { .compatible = "galaxycore,gc0308" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, gc0308_of_match);
> +
> +static struct i2c_driver gc0308_i2c_driver = {
> + .driver = {
> + .name = "gc0308",
> + .pm = &gc0308_pm_ops,
> + .of_match_table = gc0308_of_match,
> + },
> + .probe = gc0308_probe,
> + .remove = gc0308_remove,
> +};
> +module_i2c_driver(gc0308_i2c_driver);
> +
> +MODULE_DESCRIPTION("GalaxyCore GC0308 Camera Driver");
> +MODULE_AUTHOR("Sebastian Reichel <[email protected]>");
> +MODULE_LICENSE("GPL");
> --
> 2.42.0
>

2023-11-06 08:46:26

by Sakari Ailus

[permalink] [raw]

Subject: Re: [PATCH v3 4/4] media: i2c: gc0308: new driver

Hi Jacopo, Sebastian,

On Mon, Oct 30, 2023 at 09:37:08AM +0100, Jacopo Mondi wrote:
> > +static bool gc0308_is_valid_format(u32 code)
> > +{
> > + unsigned int i;
> > +
> > + for (i = 0; i < ARRAY_SIZE(gc0308_formats); i++) {
> > + if (gc0308_formats[i].code == code)
> > + return true;
> > + }
> > +
> > + return false;
> > +}
> > +
> > +static int gc0308_enum_frame_size(struct v4l2_subdev *subdev,
> > + struct v4l2_subdev_state *sd_state,
> > + struct v4l2_subdev_frame_size_enum *fse)
> > +{
> > + if (fse->index >= ARRAY_SIZE(gc0308_frame_sizes))
> > + return -EINVAL;
> > +
> > + if (!gc0308_is_valid_format(fse->code))
> > + return -EINVAL;
> > +
> > + fse->min_width = gc0308_frame_sizes[fse->index].width;
> > + fse->max_width = gc0308_frame_sizes[fse->index].width;
> > + fse->min_height = gc0308_frame_sizes[fse->index].height;
> > + fse->max_height = gc0308_frame_sizes[fse->index].height;
> > +
> > + return 0;
> > +}
> > +
> > +static void gc0308_update_pad_format(const struct gc0308_frame_size *mode,
> > + struct v4l2_mbus_framefmt *fmt, u32 code)
> > +{
> > + fmt->width = mode->width;
> > + fmt->height = mode->height;
> > + fmt->code = code;
> > + fmt->field = V4L2_FIELD_NONE;
> > + fmt->colorspace = V4L2_COLORSPACE_SRGB;
> > +}
> > +
> > +static int gc0308_set_format(struct v4l2_subdev *sd,
> > + struct v4l2_subdev_state *sd_state,
> > + struct v4l2_subdev_format *fmt)
> > +{
> > + struct gc0308 *gc0308 = to_gc0308(sd);
> > + const struct gc0308_frame_size *mode;
> > + unsigned int i;
> > +
> > + for (i = 0; i < ARRAY_SIZE(gc0308_formats); i++) {
> > + if (fmt->format.code == gc0308_formats[i].code)
> > + break;
> > + }
> > +
> > + if (i >= ARRAY_SIZE(gc0308_formats)) {
> > + dev_warn(gc0308->dev, "unsupported format code: %08x\n",
> > + fmt->format.code);

This isn't supposed to generate a kernel log message. I'd drop it
altogether.

> > + i = 0;
> > + }
>
> This looks very similar to gc0308_is_valid_format()

Could gc0308_is_valid_format() return a pointer to the format array or
NULL? Then you could check for NULL here and use the first entry in that
case.

>
> > +
> > + mode = v4l2_find_nearest_size(gc0308_frame_sizes,
> > + ARRAY_SIZE(gc0308_frame_sizes), width,
> > + height, fmt->format.width,
> > + fmt->format.height);
> > +
> > + gc0308_update_pad_format(mode, &fmt->format, gc0308_formats[i].code);
> > + *v4l2_subdev_get_pad_format(sd, sd_state, fmt->pad) = fmt->format;
> > +
> > + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
> > + return 0;
> > +
> > + gc0308->mode.out_format = gc0308_formats[i].regval;
> > + gc0308->mode.subsample = mode->subsample;
> > + gc0308->mode.width = mode->width;
> > + gc0308->mode.height = mode->height;
> > +
> > + return 0;
> > +}

...

> > + ret = v4l2_async_register_subdev(&gc0308->sd);
> > + if (ret) {
> > + dev_err_probe(dev, ret, "failed to register v4l subdev\n");
> > + goto fail_power_off;
> > + }
> > +
> > + pm_runtime_set_active(dev);
> > + pm_runtime_enable(dev);
> > + pm_runtime_set_autosuspend_delay(&client->dev, 1000);
> > + pm_runtime_use_autosuspend(&client->dev);
> > + pm_runtime_idle(dev);

This will effective power off the device immediately, without a delay. But
I guess that's ok.

Note that enabling runtime PM needs to take place before registering the
sub-device. I'd move all these calls before that.

> > +
> > + return 0;
> > +
> > +fail_power_off:
> > + gc0308_power_off(dev);
> > +fail_subdev_cleanup:
> > + v4l2_subdev_cleanup(&gc0308->sd);
> > +fail_media_entity_cleanup:
> > + media_entity_cleanup(&gc0308->sd.entity);
> > +fail_ctrl_hdl_cleanup:
> > + v4l2_ctrl_handler_free(&gc0308->hdl);
> > + return ret;
> > +}
> > +
> > +static void gc0308_remove(struct i2c_client *client)
> > +{
> > + struct gc0308 *gc0308 = i2c_get_clientdata(client);
> > + struct device *dev = &client->dev;
> > +
> > + pm_runtime_get_sync(dev);
>
> Uh, I've never seen this call in a _remove before. Is it intentional ?

I think disabling runtime PM and marking the device suspended are enough
here runtime PM-wise.

>
> Apart these two nits the rest is good! thanks for addressing the
> comments received on the previous version.
>
> Reviewed-by: Jacopo Mondi <[email protected]>
>
> Thanks
> j
>
> > +
> > + v4l2_async_unregister_subdev(&gc0308->sd);
> > + v4l2_ctrl_handler_free(&gc0308->hdl);
> > +
> > + pm_runtime_disable(dev);
> > + pm_runtime_set_suspended(dev);
> > + pm_runtime_put_noidle(dev);
> > + gc0308_power_off(dev);
> > +}

--
Regards,

Sakari Ailus

2023-11-07 08:28:25

by Alain Volmat

[permalink] [raw]

Subject: Re: [PATCH v3 4/4] media: i2c: gc0308: new driver

Hi Sebastian,

On Fri, Oct 27, 2023 at 03:12:04AM +0200, Sebastian Reichel wrote:
> Introduce new driver for GalaxyCore GC0308, which is a cheap
> 640x480 with an on-chip ISP sensor sold since 2010. Data is
> provided via parallel bus.
>
> Signed-off-by: Sebastian Reichel <[email protected]>
> ---
> MAINTAINERS | 7 +
> drivers/media/i2c/Kconfig | 10 +
> drivers/media/i2c/Makefile | 1 +
> drivers/media/i2c/gc0308.c | 1437 ++++++++++++++++++++++++++++++++++++
> 4 files changed, 1455 insertions(+)
> create mode 100644 drivers/media/i2c/gc0308.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 5f64cd42ff37..f03fd34067d0 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -8627,6 +8627,13 @@ F: drivers/mfd/gateworks-gsc.c
> F: include/linux/mfd/gsc.h
> F: include/linux/platform_data/gsc_hwmon.h
>
> +GC0308 GALAXYCORE CAMERA SENSOR DRIVER
> +M: Sebastian Reichel <[email protected]>
> +L: [email protected]
> +S: Maintained
> +F: Documentation/devicetree/bindings/media/i2c/galaxycore,gc0308.yaml
> +F: drivers/media/i2c/gc0308.c
> +
> GCC PLUGINS
> M: Kees Cook <[email protected]>
> L: [email protected]
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index 74ff833ff48c..d7e52a9d3dd2 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -50,6 +50,16 @@ config VIDEO_AR0521
> To compile this driver as a module, choose M here: the
> module will be called ar0521.
>
> +config VIDEO_GC0308
> + tristate "GalaxyCore GC0308 sensor support"
> + select V4L2_CCI_I2C
> + help
> + This is a Video4Linux2 sensor driver for the GalaxyCore
> + GC0308 camera.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called gc0308.
> +
> config VIDEO_HI556
> tristate "Hynix Hi-556 sensor support"
> help
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index 80b00d39b48f..f03a21f2962a 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -36,6 +36,7 @@ obj-$(CONFIG_VIDEO_DW9719) += dw9719.o
> obj-$(CONFIG_VIDEO_DW9768) += dw9768.o
> obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
> obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/
> +obj-$(CONFIG_VIDEO_GC0308) += gc0308.o
> obj-$(CONFIG_VIDEO_HI556) += hi556.o
> obj-$(CONFIG_VIDEO_HI846) += hi846.o
> obj-$(CONFIG_VIDEO_HI847) += hi847.o
> diff --git a/drivers/media/i2c/gc0308.c b/drivers/media/i2c/gc0308.c
> new file mode 100644
> index 000000000000..3f117ece64ea
> --- /dev/null
> +++ b/drivers/media/i2c/gc0308.c
> @@ -0,0 +1,1437 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for the GalaxyCore GC0308 camera sensor.
> + *
> + * Copyright (c) 2023 Sebastian Reichel <[email protected]>
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/device.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
> +
> +#include <media/v4l2-cci.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-fwnode.h>
> +#include <media/v4l2-subdev.h>
> +
> +/* Analog & CISCTL*/
> +#define GC0308_CHIP_ID CCI_REG8(0x000)
> +#define GC0308_HBLANK CCI_REG8(0x001)
> +#define GC0308_VBLANK CCI_REG8(0x002)
> +#define GC0308_EXP CCI_REG16(0x003)
> +#define GC0308_ROW_START CCI_REG16(0x005)
> +#define GC0308_COL_START CCI_REG16(0x007)
> +#define GC0308_WIN_HEIGHT CCI_REG16(0x009)
> +#define GC0308_WIN_WIDTH CCI_REG16(0x00b)
> +#define GC0308_VS_START_TIME CCI_REG8(0x00d) /* in rows */
> +#define GC0308_VS_END_TIME CCI_REG8(0x00e) /* in rows */
> +#define GC0308_VB_HB CCI_REG8(0x00f)
> +#define GC0308_RSH_WIDTH CCI_REG8(0x010)
> +#define GC0308_TSP_WIDTH CCI_REG8(0x011)
> +#define GC0308_SAMPLE_HOLD_DELAY CCI_REG8(0x012)
> +#define GC0308_ROW_TAIL_WIDTH CCI_REG8(0x013)
> +#define GC0308_CISCTL_MODE1 CCI_REG8(0x014)
> +#define GC0308_CISCTL_MODE2 CCI_REG8(0x015)
> +#define GC0308_CISCTL_MODE3 CCI_REG8(0x016)
> +#define GC0308_CISCTL_MODE4 CCI_REG8(0x017)
> +#define GC0308_ANALOG_MODE1 CCI_REG8(0x01a)
> +#define GC0308_ANALOG_MODE2 CCI_REG8(0x01b)
> +#define GC0308_HRST_RSG_V18 CCI_REG8(0x01c)
> +#define GC0308_VREF_V25 CCI_REG8(0x01d)
> +#define GC0308_ADC_R CCI_REG8(0x01e)
> +#define GC0308_PAD_DRV CCI_REG8(0x01f)
> +#define GC0308_SOFT_RESET CCI_REG8(0x0fe)
> +
> +/* ISP */
> +#define GC0308_BLOCK_EN1 CCI_REG8(0x020)
> +#define GC0308_BLOCK_EN2 CCI_REG8(0x021)
> +#define GC0308_AAAA_EN CCI_REG8(0x022)
> +#define GC0308_SPECIAL_EFFECT CCI_REG8(0x023)
> +#define GC0308_OUT_FORMAT CCI_REG8(0x024)
> +#define GC0308_OUT_EN CCI_REG8(0x025)
> +#define GC0308_SYNC_MODE CCI_REG8(0x026)
> +#define GC0308_CLK_DIV_MODE CCI_REG8(0x028)
> +#define GC0308_BYPASS_MODE CCI_REG8(0x029)
> +#define GC0308_CLK_GATING CCI_REG8(0x02a)
> +#define GC0308_DITHER_MODE CCI_REG8(0x02b)
> +#define GC0308_DITHER_BIT CCI_REG8(0x02c)
> +#define GC0308_DEBUG_MODE1 CCI_REG8(0x02d)
> +#define GC0308_DEBUG_MODE2 CCI_REG8(0x02e)
> +#define GC0308_DEBUG_MODE3 CCI_REG8(0x02f)
> +#define GC0308_CROP_WIN_MODE CCI_REG8(0x046)
> +#define GC0308_CROP_WIN_Y1 CCI_REG8(0x047)
> +#define GC0308_CROP_WIN_X1 CCI_REG8(0x048)
> +#define GC0308_CROP_WIN_HEIGHT CCI_REG16(0x049)
> +#define GC0308_CROP_WIN_WIDTH CCI_REG16(0x04b)
> +
> +/* BLK */
> +#define GC0308_BLK_MODE CCI_REG8(0x030)
> +#define GC0308_BLK_LIMIT_VAL CCI_REG8(0x031)
> +#define GC0308_GLOBAL_OFF CCI_REG8(0x032)
> +#define GC0308_CURRENT_R_OFF CCI_REG8(0x033)
> +#define GC0308_CURRENT_G_OFF CCI_REG8(0x034)
> +#define GC0308_CURRENT_B_OFF CCI_REG8(0x035)
> +#define GC0308_CURRENT_R_DARK_CURRENT CCI_REG8(0x036)
> +#define GC0308_CURRENT_G_DARK_CURRENT CCI_REG8(0x037)
> +#define GC0308_CURRENT_B_DARK_CURRENT CCI_REG8(0x038)
> +#define GC0308_EXP_RATE_DARKC CCI_REG8(0x039)
> +#define GC0308_OFF_SUBMODE CCI_REG8(0x03a)
> +#define GC0308_DARKC_SUBMODE CCI_REG8(0x03b)
> +#define GC0308_MANUAL_G1_OFF CCI_REG8(0x03c)
> +#define GC0308_MANUAL_R1_OFF CCI_REG8(0x03d)
> +#define GC0308_MANUAL_B2_OFF CCI_REG8(0x03e)
> +#define GC0308_MANUAL_G2_OFF CCI_REG8(0x03f)
> +
> +/* PREGAIN */
> +#define GC0308_GLOBAL_GAIN CCI_REG8(0x050)
> +#define GC0308_AUTO_PREGAIN CCI_REG8(0x051)
> +#define GC0308_AUTO_POSTGAIN CCI_REG8(0x052)
> +#define GC0308_CHANNEL_GAIN_G1 CCI_REG8(0x053)
> +#define GC0308_CHANNEL_GAIN_R CCI_REG8(0x054)
> +#define GC0308_CHANNEL_GAIN_B CCI_REG8(0x055)
> +#define GC0308_CHANNEL_GAIN_G2 CCI_REG8(0x056)
> +#define GC0308_R_RATIO CCI_REG8(0x057)
> +#define GC0308_G_RATIO CCI_REG8(0x058)
> +#define GC0308_B_RATIO CCI_REG8(0x059)
> +#define GC0308_AWB_R_GAIN CCI_REG8(0x05a)
> +#define GC0308_AWB_G_GAIN CCI_REG8(0x05b)
> +#define GC0308_AWB_B_GAIN CCI_REG8(0x05c)
> +#define GC0308_LSC_DEC_LVL1 CCI_REG8(0x05d)
> +#define GC0308_LSC_DEC_LVL2 CCI_REG8(0x05e)
> +#define GC0308_LSC_DEC_LVL3 CCI_REG8(0x05f)
> +
> +/* DNDD */
> +#define GC0308_DN_MODE_EN CCI_REG8(0x060)
> +#define GC0308_DN_MODE_RATIO CCI_REG8(0x061)
> +#define GC0308_DN_BILAT_B_BASE CCI_REG8(0x062)
> +#define GC0308_DN_B_INCR CCI_REG8(0x063)
> +#define GC0308_DN_BILAT_N_BASE CCI_REG8(0x064)
> +#define GC0308_DN_N_INCR CCI_REG8(0x065)
> +#define GC0308_DD_DARK_BRIGHT_TH CCI_REG8(0x066)
> +#define GC0308_DD_FLAT_TH CCI_REG8(0x067)
> +#define GC0308_DD_LIMIT CCI_REG8(0x068)
> +
> +/* ASDE - Auto Saturation De-noise and Edge-Enhancement */
> +#define GC0308_ASDE_GAIN_TRESH CCI_REG8(0x069)
> +#define GC0308_ASDE_GAIN_MODE CCI_REG8(0x06a)
> +#define GC0308_ASDE_DN_SLOPE CCI_REG8(0x06b)
> +#define GC0308_ASDE_DD_BRIGHT CCI_REG8(0x06c)
> +#define GC0308_ASDE_DD_LIMIT CCI_REG8(0x06d)
> +#define GC0308_ASDE_AUTO_EE1 CCI_REG8(0x06e)
> +#define GC0308_ASDE_AUTO_EE2 CCI_REG8(0x06f)
> +#define GC0308_ASDE_AUTO_SAT_DEC_SLOPE CCI_REG8(0x070)
> +#define GC0308_ASDE_AUTO_SAT_LOW_LIMIT CCI_REG8(0x071)
> +
> +/* INTPEE - Interpolation and Edge-Enhancement */
> +#define GC0308_EEINTP_MODE_1 CCI_REG8(0x072)
> +#define GC0308_EEINTP_MODE_2 CCI_REG8(0x073)
> +#define GC0308_DIRECTION_TH1 CCI_REG8(0x074)
> +#define GC0308_DIRECTION_TH2 CCI_REG8(0x075)
> +#define GC0308_DIFF_HV_TI_TH CCI_REG8(0x076)
> +#define GC0308_EDGE12_EFFECT CCI_REG8(0x077)
> +#define GC0308_EDGE_POS_RATIO CCI_REG8(0x078)
> +#define GC0308_EDGE1_MINMAX CCI_REG8(0x079)
> +#define GC0308_EDGE2_MINMAX CCI_REG8(0x07a)
> +#define GC0308_EDGE12_TH CCI_REG8(0x07b)
> +#define GC0308_EDGE_MAX CCI_REG8(0x07c)
> +
> +/* ABB - Auto Black Balance */
> +#define GC0308_ABB_MODE CCI_REG8(0x080)
> +#define GC0308_ABB_TARGET_AVGH CCI_REG8(0x081)
> +#define GC0308_ABB_TARGET_AVGL CCI_REG8(0x082)
> +#define GC0308_ABB_LIMIT_VAL CCI_REG8(0x083)
> +#define GC0308_ABB_SPEED CCI_REG8(0x084)
> +#define GC0308_CURR_R_BLACK_LVL CCI_REG8(0x085)
> +#define GC0308_CURR_G_BLACK_LVL CCI_REG8(0x086)
> +#define GC0308_CURR_B_BLACK_LVL CCI_REG8(0x087)
> +#define GC0308_CURR_R_BLACK_FACTOR CCI_REG8(0x088)
> +#define GC0308_CURR_G_BLACK_FACTOR CCI_REG8(0x089)
> +#define GC0308_CURR_B_BLACK_FACTOR CCI_REG8(0x08a)
> +
> +/* LSC - Lens Shading Correction */
> +#define GC0308_LSC_RED_B2 CCI_REG8(0x08b)
> +#define GC0308_LSC_GREEN_B2 CCI_REG8(0x08c)
> +#define GC0308_LSC_BLUE_B2 CCI_REG8(0x08d)
> +#define GC0308_LSC_RED_B4 CCI_REG8(0x08e)
> +#define GC0308_LSC_GREEN_B4 CCI_REG8(0x08f)
> +#define GC0308_LSC_BLUE_B4 CCI_REG8(0x090)
> +#define GC0308_LSC_ROW_CENTER CCI_REG8(0x091)
> +#define GC0308_LSC_COL_CENTER CCI_REG8(0x092)
> +
> +/* CC - Channel Coefficient */
> +#define GC0308_CC_MATRIX_C11 CCI_REG8(0x093)
> +#define GC0308_CC_MATRIX_C12 CCI_REG8(0x094)
> +#define GC0308_CC_MATRIX_C13 CCI_REG8(0x095)
> +#define GC0308_CC_MATRIX_C21 CCI_REG8(0x096)
> +#define GC0308_CC_MATRIX_C22 CCI_REG8(0x097)
> +#define GC0308_CC_MATRIX_C23 CCI_REG8(0x098)
> +#define GC0308_CC_MATRIX_C41 CCI_REG8(0x09c)
> +#define GC0308_CC_MATRIX_C42 CCI_REG8(0x09d)
> +#define GC0308_CC_MATRIX_C43 CCI_REG8(0x09e)
> +
> +/* GAMMA */
> +#define GC0308_GAMMA_OUT0 CCI_REG8(0x09f)
> +#define GC0308_GAMMA_OUT1 CCI_REG8(0x0a0)
> +#define GC0308_GAMMA_OUT2 CCI_REG8(0x0a1)
> +#define GC0308_GAMMA_OUT3 CCI_REG8(0x0a2)
> +#define GC0308_GAMMA_OUT4 CCI_REG8(0x0a3)
> +#define GC0308_GAMMA_OUT5 CCI_REG8(0x0a4)
> +#define GC0308_GAMMA_OUT6 CCI_REG8(0x0a5)
> +#define GC0308_GAMMA_OUT7 CCI_REG8(0x0a6)
> +#define GC0308_GAMMA_OUT8 CCI_REG8(0x0a7)
> +#define GC0308_GAMMA_OUT9 CCI_REG8(0x0a8)
> +#define GC0308_GAMMA_OUT10 CCI_REG8(0x0a9)
> +#define GC0308_GAMMA_OUT11 CCI_REG8(0x0aa)
> +#define GC0308_GAMMA_OUT12 CCI_REG8(0x0ab)
> +#define GC0308_GAMMA_OUT13 CCI_REG8(0x0ac)
> +#define GC0308_GAMMA_OUT14 CCI_REG8(0x0ad)
> +#define GC0308_GAMMA_OUT15 CCI_REG8(0x0ae)
> +#define GC0308_GAMMA_OUT16 CCI_REG8(0x0af)
> +
> +/* YCP */
> +#define GC0308_GLOBAL_SATURATION CCI_REG8(0x0b0)
> +#define GC0308_SATURATION_CB CCI_REG8(0x0b1)
> +#define GC0308_SATURATION_CR CCI_REG8(0x0b2)
> +#define GC0308_LUMA_CONTRAST CCI_REG8(0x0b3)
> +#define GC0308_CONTRAST_CENTER CCI_REG8(0x0b4)
> +#define GC0308_LUMA_OFFSET CCI_REG8(0x0b5)
> +#define GC0308_SKIN_CB_CENTER CCI_REG8(0x0b6)
> +#define GC0308_SKIN_CR_CENTER CCI_REG8(0x0b7)
> +#define GC0308_SKIN_RADIUS_SQUARE CCI_REG8(0x0b8)
> +#define GC0308_SKIN_BRIGHTNESS CCI_REG8(0x0b9)
> +#define GC0308_FIXED_CB CCI_REG8(0x0ba)
> +#define GC0308_FIXED_CR CCI_REG8(0x0bb)
> +#define GC0308_EDGE_DEC_SA CCI_REG8(0x0bd)
> +#define GC0308_AUTO_GRAY_MODE CCI_REG8(0x0be)
> +#define GC0308_SATURATION_SUB_STRENGTH CCI_REG8(0x0bf)
> +#define GC0308_Y_GAMMA_OUT0 CCI_REG8(0x0c0)
> +#define GC0308_Y_GAMMA_OUT1 CCI_REG8(0x0c1)
> +#define GC0308_Y_GAMMA_OUT2 CCI_REG8(0x0c2)
> +#define GC0308_Y_GAMMA_OUT3 CCI_REG8(0x0c3)
> +#define GC0308_Y_GAMMA_OUT4 CCI_REG8(0x0c4)
> +#define GC0308_Y_GAMMA_OUT5 CCI_REG8(0x0c5)
> +#define GC0308_Y_GAMMA_OUT6 CCI_REG8(0x0c6)
> +#define GC0308_Y_GAMMA_OUT7 CCI_REG8(0x0c7)
> +#define GC0308_Y_GAMMA_OUT8 CCI_REG8(0x0c8)
> +#define GC0308_Y_GAMMA_OUT9 CCI_REG8(0x0c9)
> +#define GC0308_Y_GAMMA_OUT10 CCI_REG8(0x0ca)
> +#define GC0308_Y_GAMMA_OUT11 CCI_REG8(0x0cb)
> +#define GC0308_Y_GAMMA_OUT12 CCI_REG8(0x0cc)
> +
> +/* AEC - Automatic Exposure Control */
> +#define GC0308_AEC_MODE1 CCI_REG8(0x0d0)
> +#define GC0308_AEC_MODE2 CCI_REG8(0x0d1)
> +#define GC0308_AEC_MODE3 CCI_REG8(0x0d2)
> +#define GC0308_AEC_TARGET_Y CCI_REG8(0x0d3)
> +#define GC0308_Y_AVG CCI_REG8(0x0d4)
> +#define GC0308_AEC_HIGH_LOW_RANGE CCI_REG8(0x0d5)
> +#define GC0308_AEC_IGNORE CCI_REG8(0x0d6)
> +#define GC0308_AEC_LIMIT_HIGH_RANGE CCI_REG8(0x0d7)
> +#define GC0308_AEC_R_OFFSET CCI_REG8(0x0d9)
> +#define GC0308_AEC_GB_OFFSET CCI_REG8(0x0da)
> +#define GC0308_AEC_SLOW_MARGIN CCI_REG8(0x0db)
> +#define GC0308_AEC_FAST_MARGIN CCI_REG8(0x0dc)
> +#define GC0308_AEC_EXP_CHANGE_GAIN CCI_REG8(0x0dd)
> +#define GC0308_AEC_STEP2_SUNLIGHT CCI_REG8(0x0de)
> +#define GC0308_AEC_I_FRAMES CCI_REG8(0x0df)
> +#define GC0308_AEC_I_STOP_L_MARGIN CCI_REG8(0x0e0)
> +#define GC0308_AEC_I_STOP_MARGIN CCI_REG8(0x0e1)
> +#define GC0308_ANTI_FLICKER_STEP CCI_REG16(0x0e2)
> +#define GC0308_EXP_LVL_1 CCI_REG16(0x0e4)
> +#define GC0308_EXP_LVL_2 CCI_REG16(0x0e6)
> +#define GC0308_EXP_LVL_3 CCI_REG16(0x0e8)
> +#define GC0308_EXP_LVL_4 CCI_REG16(0x0ea)
> +#define GC0308_MAX_EXP_LVL CCI_REG8(0x0ec)
> +#define GC0308_EXP_MIN_L CCI_REG8(0x0ed)
> +#define GC0308_MAX_POST_DF_GAIN CCI_REG8(0x0ee)
> +#define GC0308_MAX_PRE_DG_GAIN CCI_REG8(0x0ef)
> +
> +/* ABS */
> +#define GC0308_ABS_RANGE_COMP CCI_REG8(0x0f0)
> +#define GC0308_ABS_STOP_MARGIN CCI_REG8(0x0f1)
> +#define GC0308_Y_S_COMP CCI_REG8(0x0f2)
> +#define GC0308_Y_STRETCH_LIMIT CCI_REG8(0x0f3)
> +#define GC0308_Y_TILT CCI_REG8(0x0f4)
> +#define GC0308_Y_STRETCH CCI_REG8(0x0f5)
> +
> +/* Measure Window */
> +#define GC0308_BIG_WIN_X0 CCI_REG8(0x0f7)
> +#define GC0308_BIG_WIN_Y0 CCI_REG8(0x0f8)
> +#define GC0308_BIG_WIN_X1 CCI_REG8(0x0f9)
> +#define GC0308_BIG_WIN_Y1 CCI_REG8(0x0fa)
> +#define GC0308_DIFF_Y_BIG_THD CCI_REG8(0x0fb)
> +
> +/* OUT Module (P1) */
> +#define GC0308_CLOSE_FRAME_EN CCI_REG8(0x150)
> +#define GC0308_CLOSE_FRAME_NUM1 CCI_REG8(0x151)
> +#define GC0308_CLOSE_FRAME_NUM2 CCI_REG8(0x152)
> +#define GC0308_BAYER_MODE CCI_REG8(0x153)
> +#define GC0308_SUBSAMPLE CCI_REG8(0x154)
> +#define GC0308_SUBMODE CCI_REG8(0x155)
> +#define GC0308_SUB_ROW_N1 CCI_REG8(0x156)
> +#define GC0308_SUB_ROW_N2 CCI_REG8(0x157)
> +#define GC0308_SUB_COL_N1 CCI_REG8(0x158)
> +#define GC0308_SUB_COL_N2 CCI_REG8(0x159)
> +
> +/* AWB (P1) - Auto White Balance */
> +#define GC0308_AWB_RGB_HIGH_LOW CCI_REG8(0x100)
> +#define GC0308_AWB_Y_TO_C_DIFF2 CCI_REG8(0x102)
> +#define GC0308_AWB_C_MAX CCI_REG8(0x104)
> +#define GC0308_AWB_C_INTER CCI_REG8(0x105)
> +#define GC0308_AWB_C_INTER2 CCI_REG8(0x106)
> +#define GC0308_AWB_C_MAX_BIG CCI_REG8(0x108)
> +#define GC0308_AWB_Y_HIGH CCI_REG8(0x109)
> +#define GC0308_AWB_NUMBER_LIMIT CCI_REG8(0x10a)
> +#define GC0308_KWIN_RATIO CCI_REG8(0x10b)
> +#define GC0308_KWIN_THD CCI_REG8(0x10c)
> +#define GC0308_LIGHT_GAIN_RANGE CCI_REG8(0x10d)
> +#define GC0308_SMALL_WIN_WIDTH_STEP CCI_REG8(0x10e)
> +#define GC0308_SMALL_WIN_HEIGHT_STEP CCI_REG8(0x10f)
> +#define GC0308_AWB_YELLOW_TH CCI_REG8(0x110)
> +#define GC0308_AWB_MODE CCI_REG8(0x111)
> +#define GC0308_AWB_ADJUST_SPEED CCI_REG8(0x112)
> +#define GC0308_AWB_EVERY_N CCI_REG8(0x113)
> +#define GC0308_R_AVG_USE CCI_REG8(0x1d0)
> +#define GC0308_G_AVG_USE CCI_REG8(0x1d1)
> +#define GC0308_B_AVG_USE CCI_REG8(0x1d2)
> +
> +#define GC0308_HBLANK_MIN 0x021
> +#define GC0308_HBLANK_MAX 0xfff
> +#define GC0308_HBLANK_DEF 0x040
> +
> +#define GC0308_VBLANK_MIN 0x000
> +#define GC0308_VBLANK_MAX 0xfff
> +#define GC0308_VBLANK_DEF 0x020
> +
> +#define GC0308_PIXEL_RATE 24000000
> +
> +/*
> + * frame_time = (BT + height + 8) * row_time
> + * width = 640 (driver does not change window size)
> + * height = 480 (driver does not change window size)
> + * row_time = HBLANK + SAMPLE_HOLD_DELAY + width + 8 + 4
> + *
> + * When EXP_TIME > (BT + height):
> + * BT = EXP_TIME - height - 8 - VS_START_TIME + VS_END_TIME
> + * else:
> + * BT = VBLANK + VS_START_TIME + VS_END_TIME
> + *
> + * max is 30 FPS
> + *
> + * In my tests frame rate mostly depends on exposure time. Unfortuantely
> + * it's unclear how this is calculated exactly. Also since we enable AEC,
> + * the frame times vary depending on ambient light conditions.
> + */
> +#define GC0308_FRAME_RATE_MAX 30
> +
> +enum gc0308_exp_val {
> + GC0308_EXP_M4 = 0,
> + GC0308_EXP_M3,
> + GC0308_EXP_M2,
> + GC0308_EXP_M1,
> + GC0308_EXP_0,
> + GC0308_EXP_P1,
> + GC0308_EXP_P2,
> + GC0308_EXP_P3,
> + GC0308_EXP_P4,
> +};
> +
> +static const s64 gc0308_exposure_menu[] = {
> + -4, -3, -2, -1, 0, 1, 2, 3, 4
> +};
> +
> +struct gc0308_exposure {
> + u8 luma_offset;
> + u8 aec_target_y;
> +};
> +
> +#define GC0308_EXPOSURE(luma_offset_reg, aec_target_y_reg) \
> + { .luma_offset = luma_offset_reg, .aec_target_y = aec_target_y_reg }
> +
> +static const struct gc0308_exposure gc0308_exposure_values[] = {
> + [GC0308_EXP_M4] = GC0308_EXPOSURE(0xc0, 0x30),
> + [GC0308_EXP_M3] = GC0308_EXPOSURE(0xd0, 0x38),
> + [GC0308_EXP_M2] = GC0308_EXPOSURE(0xe0, 0x40),
> + [GC0308_EXP_M1] = GC0308_EXPOSURE(0xf0, 0x48),
> + [GC0308_EXP_0] = GC0308_EXPOSURE(0x08, 0x50),
> + [GC0308_EXP_P1] = GC0308_EXPOSURE(0x10, 0x5c),
> + [GC0308_EXP_P2] = GC0308_EXPOSURE(0x20, 0x60),
> + [GC0308_EXP_P3] = GC0308_EXPOSURE(0x30, 0x68),
> + [GC0308_EXP_P4] = GC0308_EXPOSURE(0x40, 0x70),
> +};
> +
> +struct gc0308_awb_gains {
> + u8 r;
> + u8 g;
> + u8 b;
> +};
> +
> +#define GC0308_AWB_GAINS(red, green, blue) \
> + { .r = red, .g = green, .b = blue }
> +
> +static const struct gc0308_awb_gains gc0308_awb_gains[] = {
> + [V4L2_WHITE_BALANCE_AUTO] = GC0308_AWB_GAINS(0x56, 0x40, 0x4a),
> + [V4L2_WHITE_BALANCE_CLOUDY] = GC0308_AWB_GAINS(0x8c, 0x50, 0x40),
> + [V4L2_WHITE_BALANCE_DAYLIGHT] = GC0308_AWB_GAINS(0x74, 0x52, 0x40),
> + [V4L2_WHITE_BALANCE_INCANDESCENT] = GC0308_AWB_GAINS(0x48, 0x40, 0x5c),
> + [V4L2_WHITE_BALANCE_FLUORESCENT] = GC0308_AWB_GAINS(0x40, 0x42, 0x50),
> +};
> +
> +struct gc0308_format {
> + u32 code;
> + u8 regval;
> +};
> +
> +#define GC0308_FORMAT(v4l2_code, gc0308_regval) \
> + { .code = v4l2_code, .regval = gc0308_regval }
> +
> +static const struct gc0308_format gc0308_formats[] = {
> + GC0308_FORMAT(MEDIA_BUS_FMT_UYVY8_2X8, 0x00),
> + GC0308_FORMAT(MEDIA_BUS_FMT_VYUY8_2X8, 0x01),
> + GC0308_FORMAT(MEDIA_BUS_FMT_YUYV8_2X8, 0x02),
> + GC0308_FORMAT(MEDIA_BUS_FMT_YVYU8_2X8, 0x03),
> + GC0308_FORMAT(MEDIA_BUS_FMT_RGB565_2X8_BE, 0x06),
> + GC0308_FORMAT(MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE, 0x07),
> + GC0308_FORMAT(MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE, 0x09),

For your information, in case you might need the _LE format.
I discovered while correcting endianness for the GC2145 sensor,
that they can also do RGB565_2X8_LE formats and looking rapidly
at the G0308 datasheet, it seems to be similar for the G0308.
This is done by setting the bit 5 (first_second_switch) of
the P0:0x29 (bypass_mode) register which should allow you to get
little endian formatting instead of _BE ;-)

Regards,
Alain

> +};
> +
> +struct gc0308_frame_size {
> + u8 subsample;
> + u32 width;
> + u32 height;
> +};
> +
> +#define GC0308_FRAME_SIZE(s, w, h) \
> + { .subsample = s, .width = w, .height = h }
> +
> +static const struct gc0308_frame_size gc0308_frame_sizes[] = {
> + GC0308_FRAME_SIZE(0x11, 640, 480),
> + GC0308_FRAME_SIZE(0x22, 320, 240),
> + GC0308_FRAME_SIZE(0x44, 160, 120),
> +};
> +
> +struct gc0308_mode_registers {
> + u8 out_format;
> + u8 subsample;
> + u16 width;
> + u16 height;
> +};
> +
> +struct gc0308 {
> + struct v4l2_subdev sd;
> + struct v4l2_ctrl_handler hdl;
> + struct media_pad pad;
> + struct device *dev;
> + struct clk *clk;
> + struct regmap *regmap;
> + struct regulator *vdd;
> + struct gpio_desc *pwdn_gpio;
> + struct gpio_desc *reset_gpio;
> + unsigned int mbus_config;
> + struct gc0308_mode_registers mode;
> + struct {
> + /* mirror cluster */
> + struct v4l2_ctrl *hflip;
> + struct v4l2_ctrl *vflip;
> + };
> + struct {
> + /* blanking cluster */
> + struct v4l2_ctrl *hblank;
> + struct v4l2_ctrl *vblank;
> + };
> +};
> +
> +static inline struct gc0308 *to_gc0308(struct v4l2_subdev *sd)
> +{
> + return container_of(sd, struct gc0308, sd);
> +}
> +
> +static const struct regmap_range_cfg gc0308_ranges[] = {
> + {
> + .range_min = 0x0000,
> + .range_max = 0x01ff,
> + .selector_reg = 0xfe,
> + .selector_mask = 0x01,
> + .selector_shift = 0x00,
> + .window_start = 0x00,
> + .window_len = 0x100,
> + },
> +};
> +
> +static const struct regmap_config gc0308_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> + .reg_format_endian = REGMAP_ENDIAN_BIG,
> + .max_register = 0x1ff,
> + .ranges = gc0308_ranges,
> + .num_ranges = ARRAY_SIZE(gc0308_ranges),
> + .disable_locking = true,
> +};
> +
> +static const struct cci_reg_sequence sensor_default_regs[] = {
> + {GC0308_VB_HB, 0x00},
> + {GC0308_HBLANK, 0x40},
> + {GC0308_VBLANK, 0x20},
> + {GC0308_EXP, 0x0258},
> + {GC0308_AWB_R_GAIN, 0x56},
> + {GC0308_AWB_G_GAIN, 0x40},
> + {GC0308_AWB_B_GAIN, 0x4a},
> + {GC0308_ANTI_FLICKER_STEP, 0x0078},
> + {GC0308_EXP_LVL_1, 0x0258},
> + {GC0308_EXP_LVL_2, 0x0258},
> + {GC0308_EXP_LVL_3, 0x0258},
> + {GC0308_EXP_LVL_4, 0x0ea6},
> + {GC0308_MAX_EXP_LVL, 0x20},
> + {GC0308_ROW_START, 0x0000},
> + {GC0308_COL_START, 0x0000},
> + {GC0308_WIN_HEIGHT, 488},
> + {GC0308_WIN_WIDTH, 648},
> + {GC0308_VS_START_TIME, 0x02},
> + {GC0308_VS_END_TIME, 0x02},
> + {GC0308_RSH_WIDTH, 0x22},
> + {GC0308_TSP_WIDTH, 0x0d},
> + {GC0308_SAMPLE_HOLD_DELAY, 0x50},
> + {GC0308_ROW_TAIL_WIDTH, 0x0f},
> + {GC0308_CISCTL_MODE1, 0x10},
> + {GC0308_CISCTL_MODE2, 0x0a},
> + {GC0308_CISCTL_MODE3, 0x05},
> + {GC0308_CISCTL_MODE4, 0x01},
> + {CCI_REG8(0x018), 0x44}, /* undocumented */
> + {CCI_REG8(0x019), 0x44}, /* undocumented */
> + {GC0308_ANALOG_MODE1, 0x2a},
> + {GC0308_ANALOG_MODE2, 0x00},
> + {GC0308_HRST_RSG_V18, 0x49},
> + {GC0308_VREF_V25, 0x9a},
> + {GC0308_ADC_R, 0x61},
> + {GC0308_PAD_DRV, 0x01}, /* drv strength: pclk=4mA */
> + {GC0308_BLOCK_EN1, 0x7f},
> + {GC0308_BLOCK_EN2, 0xfa},
> + {GC0308_AAAA_EN, 0x57},
> + {GC0308_OUT_FORMAT, 0xa2}, /* YCbYCr */
> + {GC0308_OUT_EN, 0x0f},
> + {GC0308_SYNC_MODE, 0x03},
> + {GC0308_CLK_DIV_MODE, 0x00},
> + {GC0308_DEBUG_MODE1, 0x0a},
> + {GC0308_DEBUG_MODE2, 0x00},
> + {GC0308_DEBUG_MODE3, 0x01},
> + {GC0308_BLK_MODE, 0xf7},
> + {GC0308_BLK_LIMIT_VAL, 0x50},
> + {GC0308_GLOBAL_OFF, 0x00},
> + {GC0308_CURRENT_R_OFF, 0x28},
> + {GC0308_CURRENT_G_OFF, 0x2a},
> + {GC0308_CURRENT_B_OFF, 0x28},
> + {GC0308_EXP_RATE_DARKC, 0x04},
> + {GC0308_OFF_SUBMODE, 0x20},
> + {GC0308_DARKC_SUBMODE, 0x20},
> + {GC0308_MANUAL_G1_OFF, 0x00},
> + {GC0308_MANUAL_R1_OFF, 0x00},
> + {GC0308_MANUAL_B2_OFF, 0x00},
> + {GC0308_MANUAL_G2_OFF, 0x00},
> + {GC0308_GLOBAL_GAIN, 0x14},
> + {GC0308_AUTO_POSTGAIN, 0x41},
> + {GC0308_CHANNEL_GAIN_G1, 0x80},
> + {GC0308_CHANNEL_GAIN_R, 0x80},
> + {GC0308_CHANNEL_GAIN_B, 0x80},
> + {GC0308_CHANNEL_GAIN_G2, 0x80},
> + {GC0308_LSC_RED_B2, 0x20},
> + {GC0308_LSC_GREEN_B2, 0x20},
> + {GC0308_LSC_BLUE_B2, 0x20},
> + {GC0308_LSC_RED_B4, 0x14},
> + {GC0308_LSC_GREEN_B4, 0x10},
> + {GC0308_LSC_BLUE_B4, 0x14},
> + {GC0308_LSC_ROW_CENTER, 0x3c},
> + {GC0308_LSC_COL_CENTER, 0x50},
> + {GC0308_LSC_DEC_LVL1, 0x12},
> + {GC0308_LSC_DEC_LVL2, 0x1a},
> + {GC0308_LSC_DEC_LVL3, 0x24},
> + {GC0308_DN_MODE_EN, 0x07},
> + {GC0308_DN_MODE_RATIO, 0x15},
> + {GC0308_DN_BILAT_B_BASE, 0x08},
> + {GC0308_DN_BILAT_N_BASE, 0x03},
> + {GC0308_DD_DARK_BRIGHT_TH, 0xe8},
> + {GC0308_DD_FLAT_TH, 0x86},
> + {GC0308_DD_LIMIT, 0x82},
> + {GC0308_ASDE_GAIN_TRESH, 0x18},
> + {GC0308_ASDE_GAIN_MODE, 0x0f},
> + {GC0308_ASDE_DN_SLOPE, 0x00},
> + {GC0308_ASDE_DD_BRIGHT, 0x5f},
> + {GC0308_ASDE_DD_LIMIT, 0x8f},
> + {GC0308_ASDE_AUTO_EE1, 0x55},
> + {GC0308_ASDE_AUTO_EE2, 0x38},
> + {GC0308_ASDE_AUTO_SAT_DEC_SLOPE, 0x15},
> + {GC0308_ASDE_AUTO_SAT_LOW_LIMIT, 0x33},
> + {GC0308_EEINTP_MODE_1, 0xdc},
> + {GC0308_EEINTP_MODE_2, 0x00},
> + {GC0308_DIRECTION_TH1, 0x02},
> + {GC0308_DIRECTION_TH2, 0x3f},
> + {GC0308_DIFF_HV_TI_TH, 0x02},
> + {GC0308_EDGE12_EFFECT, 0x38},
> + {GC0308_EDGE_POS_RATIO, 0x88},
> + {GC0308_EDGE1_MINMAX, 0x81},
> + {GC0308_EDGE2_MINMAX, 0x81},
> + {GC0308_EDGE12_TH, 0x22},
> + {GC0308_EDGE_MAX, 0xff},
> + {GC0308_CC_MATRIX_C11, 0x48},
> + {GC0308_CC_MATRIX_C12, 0x02},
> + {GC0308_CC_MATRIX_C13, 0x07},
> + {GC0308_CC_MATRIX_C21, 0xe0},
> + {GC0308_CC_MATRIX_C22, 0x40},
> + {GC0308_CC_MATRIX_C23, 0xf0},
> + {GC0308_SATURATION_CB, 0x40},
> + {GC0308_SATURATION_CR, 0x40},
> + {GC0308_LUMA_CONTRAST, 0x40},
> + {GC0308_SKIN_CB_CENTER, 0xe0},
> + {GC0308_EDGE_DEC_SA, 0x38},
> + {GC0308_AUTO_GRAY_MODE, 0x36},
> + {GC0308_AEC_MODE1, 0xcb},
> + {GC0308_AEC_MODE2, 0x10},
> + {GC0308_AEC_MODE3, 0x90},
> + {GC0308_AEC_TARGET_Y, 0x48},
> + {GC0308_AEC_HIGH_LOW_RANGE, 0xf2},
> + {GC0308_AEC_IGNORE, 0x16},
> + {GC0308_AEC_SLOW_MARGIN, 0x92},
> + {GC0308_AEC_FAST_MARGIN, 0xa5},
> + {GC0308_AEC_I_FRAMES, 0x23},
> + {GC0308_AEC_R_OFFSET, 0x00},
> + {GC0308_AEC_GB_OFFSET, 0x00},
> + {GC0308_AEC_I_STOP_L_MARGIN, 0x09},
> + {GC0308_EXP_MIN_L, 0x04},
> + {GC0308_MAX_POST_DF_GAIN, 0xa0},
> + {GC0308_MAX_PRE_DG_GAIN, 0x40},
> + {GC0308_ABB_MODE, 0x03},
> + {GC0308_GAMMA_OUT0, 0x10},
> + {GC0308_GAMMA_OUT1, 0x20},
> + {GC0308_GAMMA_OUT2, 0x38},
> + {GC0308_GAMMA_OUT3, 0x4e},
> + {GC0308_GAMMA_OUT4, 0x63},
> + {GC0308_GAMMA_OUT5, 0x76},
> + {GC0308_GAMMA_OUT6, 0x87},
> + {GC0308_GAMMA_OUT7, 0xa2},
> + {GC0308_GAMMA_OUT8, 0xb8},
> + {GC0308_GAMMA_OUT9, 0xca},
> + {GC0308_GAMMA_OUT10, 0xd8},
> + {GC0308_GAMMA_OUT11, 0xe3},
> + {GC0308_GAMMA_OUT12, 0xeb},
> + {GC0308_GAMMA_OUT13, 0xf0},
> + {GC0308_GAMMA_OUT14, 0xf8},
> + {GC0308_GAMMA_OUT15, 0xfd},
> + {GC0308_GAMMA_OUT16, 0xff},
> + {GC0308_Y_GAMMA_OUT0, 0x00},
> + {GC0308_Y_GAMMA_OUT1, 0x10},
> + {GC0308_Y_GAMMA_OUT2, 0x1c},
> + {GC0308_Y_GAMMA_OUT3, 0x30},
> + {GC0308_Y_GAMMA_OUT4, 0x43},
> + {GC0308_Y_GAMMA_OUT5, 0x54},
> + {GC0308_Y_GAMMA_OUT6, 0x65},
> + {GC0308_Y_GAMMA_OUT7, 0x75},
> + {GC0308_Y_GAMMA_OUT8, 0x93},
> + {GC0308_Y_GAMMA_OUT9, 0xb0},
> + {GC0308_Y_GAMMA_OUT10, 0xcb},
> + {GC0308_Y_GAMMA_OUT11, 0xe6},
> + {GC0308_Y_GAMMA_OUT12, 0xff},
> + {GC0308_ABS_RANGE_COMP, 0x02},
> + {GC0308_ABS_STOP_MARGIN, 0x01},
> + {GC0308_Y_S_COMP, 0x02},
> + {GC0308_Y_STRETCH_LIMIT, 0x30},
> + {GC0308_BIG_WIN_X0, 0x12},
> + {GC0308_BIG_WIN_Y0, 0x0a},
> + {GC0308_BIG_WIN_X1, 0x9f},
> + {GC0308_BIG_WIN_Y1, 0x78},
> + {GC0308_AWB_RGB_HIGH_LOW, 0xf5},
> + {GC0308_AWB_Y_TO_C_DIFF2, 0x20},
> + {GC0308_AWB_C_MAX, 0x10},
> + {GC0308_AWB_C_INTER, 0x08},
> + {GC0308_AWB_C_INTER2, 0x20},
> + {GC0308_AWB_C_MAX_BIG, 0x0a},
> + {GC0308_AWB_NUMBER_LIMIT, 0xa0},
> + {GC0308_KWIN_RATIO, 0x60},
> + {GC0308_KWIN_THD, 0x08},
> + {GC0308_SMALL_WIN_WIDTH_STEP, 0x44},
> + {GC0308_SMALL_WIN_HEIGHT_STEP, 0x32},
> + {GC0308_AWB_YELLOW_TH, 0x41},
> + {GC0308_AWB_MODE, 0x37},
> + {GC0308_AWB_ADJUST_SPEED, 0x22},
> + {GC0308_AWB_EVERY_N, 0x19},
> + {CCI_REG8(0x114), 0x44}, /* AWB set1 */
> + {CCI_REG8(0x115), 0x44}, /* AWB set1 */
> + {CCI_REG8(0x116), 0xc2}, /* AWB set1 */
> + {CCI_REG8(0x117), 0xa8}, /* AWB set1 */
> + {CCI_REG8(0x118), 0x18}, /* AWB set1 */
> + {CCI_REG8(0x119), 0x50}, /* AWB set1 */
> + {CCI_REG8(0x11a), 0xd8}, /* AWB set1 */
> + {CCI_REG8(0x11b), 0xf5}, /* AWB set1 */
> + {CCI_REG8(0x170), 0x40}, /* AWB set2 */
> + {CCI_REG8(0x171), 0x58}, /* AWB set2 */
> + {CCI_REG8(0x172), 0x30}, /* AWB set2 */
> + {CCI_REG8(0x173), 0x48}, /* AWB set2 */
> + {CCI_REG8(0x174), 0x20}, /* AWB set2 */
> + {CCI_REG8(0x175), 0x60}, /* AWB set2 */
> + {CCI_REG8(0x177), 0x20}, /* AWB set2 */
> + {CCI_REG8(0x178), 0x32}, /* AWB set2 */
> + {CCI_REG8(0x130), 0x03}, /* undocumented */
> + {CCI_REG8(0x131), 0x40}, /* undocumented */
> + {CCI_REG8(0x132), 0x10}, /* undocumented */
> + {CCI_REG8(0x133), 0xe0}, /* undocumented */
> + {CCI_REG8(0x134), 0xe0}, /* undocumented */
> + {CCI_REG8(0x135), 0x00}, /* undocumented */
> + {CCI_REG8(0x136), 0x80}, /* undocumented */
> + {CCI_REG8(0x137), 0x00}, /* undocumented */
> + {CCI_REG8(0x138), 0x04}, /* undocumented */
> + {CCI_REG8(0x139), 0x09}, /* undocumented */
> + {CCI_REG8(0x13a), 0x12}, /* undocumented */
> + {CCI_REG8(0x13b), 0x1c}, /* undocumented */
> + {CCI_REG8(0x13c), 0x28}, /* undocumented */
> + {CCI_REG8(0x13d), 0x31}, /* undocumented */
> + {CCI_REG8(0x13e), 0x44}, /* undocumented */
> + {CCI_REG8(0x13f), 0x57}, /* undocumented */
> + {CCI_REG8(0x140), 0x6c}, /* undocumented */
> + {CCI_REG8(0x141), 0x81}, /* undocumented */
> + {CCI_REG8(0x142), 0x94}, /* undocumented */
> + {CCI_REG8(0x143), 0xa7}, /* undocumented */
> + {CCI_REG8(0x144), 0xb8}, /* undocumented */
> + {CCI_REG8(0x145), 0xd6}, /* undocumented */
> + {CCI_REG8(0x146), 0xee}, /* undocumented */
> + {CCI_REG8(0x147), 0x0d}, /* undocumented */
> + {CCI_REG8(0x162), 0xf7}, /* undocumented */
> + {CCI_REG8(0x163), 0x68}, /* undocumented */
> + {CCI_REG8(0x164), 0xd3}, /* undocumented */
> + {CCI_REG8(0x165), 0xd3}, /* undocumented */
> + {CCI_REG8(0x166), 0x60}, /* undocumented */
> +};
> +
> +struct gc0308_colormode {
> + u8 special_effect;
> + u8 dbg_mode1;
> + u8 block_en1;
> + u8 aec_mode3;
> + u8 eeintp_mode_2;
> + u8 edge12_effect;
> + u8 luma_contrast;
> + u8 contrast_center;
> + u8 fixed_cb;
> + u8 fixed_cr;
> +};
> +
> +#define GC0308_COLOR_FX(reg_special_effect, reg_dbg_mode1, reg_block_en1, \
> + reg_aec_mode3, reg_eeintp_mode_2, reg_edge12_effect, \
> + reg_luma_contrast, reg_contrast_center, \
> + reg_fixed_cb, reg_fixed_cr) \
> + { \
> + .special_effect = reg_special_effect, \
> + .dbg_mode1 = reg_dbg_mode1, \
> + .block_en1 = reg_block_en1, \
> + .aec_mode3 = reg_aec_mode3, \
> + .eeintp_mode_2 = reg_eeintp_mode_2, \
> + .edge12_effect = reg_edge12_effect, \
> + .luma_contrast = reg_luma_contrast, \
> + .contrast_center = reg_contrast_center, \
> + .fixed_cb = reg_fixed_cb, \
> + .fixed_cr = reg_fixed_cr, \
> + }
> +
> +static const struct gc0308_colormode gc0308_colormodes[] = {
> + [V4L2_COLORFX_NONE] =
> + GC0308_COLOR_FX(0x00, 0x0a, 0xff, 0x90, 0x00,
> + 0x54, 0x3c, 0x80, 0x00, 0x00),
> + [V4L2_COLORFX_BW] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x00,
> + 0x54, 0x40, 0x80, 0x00, 0x00),
> + [V4L2_COLORFX_SEPIA] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x00,
> + 0x38, 0x40, 0x80, 0xd0, 0x28),
> + [V4L2_COLORFX_NEGATIVE] =
> + GC0308_COLOR_FX(0x01, 0x0a, 0xff, 0x90, 0x00,
> + 0x38, 0x40, 0x80, 0x00, 0x00),
> + [V4L2_COLORFX_EMBOSS] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xbf, 0x10, 0x01,
> + 0x38, 0x40, 0x80, 0x00, 0x00),
> + [V4L2_COLORFX_SKETCH] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x10, 0x80,
> + 0x38, 0x80, 0x90, 0x00, 0x00),
> + [V4L2_COLORFX_SKY_BLUE] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x00,
> + 0x38, 0x40, 0x80, 0x50, 0xe0),
> + [V4L2_COLORFX_GRASS_GREEN] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xff, 0x90, 0x01,
> + 0x38, 0x40, 0x80, 0xc0, 0xc0),
> + [V4L2_COLORFX_SKIN_WHITEN] =
> + GC0308_COLOR_FX(0x02, 0x0a, 0xbf, 0x10, 0x01,
> + 0x38, 0x60, 0x40, 0x00, 0x00),
> +};
> +
> +static int gc0308_power_on(struct device *dev)
> +{
> + struct gc0308 *gc0308 = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = regulator_enable(gc0308->vdd);
> + if (ret)
> + return ret;
> +
> + ret = clk_prepare_enable(gc0308->clk);
> + if (ret)
> + goto clk_fail;
> +
> + gpiod_set_value_cansleep(gc0308->pwdn_gpio, 0);
> + usleep_range(10000, 20000);
> +
> + gpiod_set_value_cansleep(gc0308->reset_gpio, 1);
> + usleep_range(10000, 20000);
> + gpiod_set_value_cansleep(gc0308->reset_gpio, 0);
> + msleep(30);
> +
> + return 0;
> +
> +clk_fail:
> + regulator_disable(gc0308->vdd);
> + return ret;
> +}
> +
> +static int gc0308_power_off(struct device *dev)
> +{
> + struct gc0308 *gc0308 = dev_get_drvdata(dev);
> +
> + gpiod_set_value_cansleep(gc0308->pwdn_gpio, 1);
> + clk_disable_unprepare(gc0308->clk);
> + regulator_disable(gc0308->vdd);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> +static int gc0308_g_register(struct v4l2_subdev *sd,
> + struct v4l2_dbg_register *reg)
> +{
> + struct gc0308 *gc0308 = to_gc0308(sd);
> +
> + return cci_read(gc0308->regmap, CCI_REG8(reg->reg), &reg->val, NULL);
> +}
> +
> +static int gc0308_s_register(struct v4l2_subdev *sd,
> + const struct v4l2_dbg_register *reg)
> +{
> + struct gc0308 *gc0308 = to_gc0308(sd);
> +
> + return cci_write(gc0308->regmap, CCI_REG8(reg->reg), reg->val, NULL);
> +}
> +#endif
> +
> +static int gc0308_set_exposure(struct gc0308 *gc0308, enum gc0308_exp_val exp)
> +{
> + const struct gc0308_exposure *regs = &gc0308_exposure_values[exp];
> + struct cci_reg_sequence exposure_reg_seq[] = {
> + {GC0308_LUMA_OFFSET, regs->luma_offset},
> + {GC0308_AEC_TARGET_Y, regs->aec_target_y},
> + };
> +
> + return cci_multi_reg_write(gc0308->regmap, exposure_reg_seq,
> + ARRAY_SIZE(exposure_reg_seq), NULL);
> +}
> +
> +static int gc0308_set_awb_mode(struct gc0308 *gc0308,
> + enum v4l2_auto_n_preset_white_balance val)
> +{
> + const struct gc0308_awb_gains *regs = &gc0308_awb_gains[val];
> + struct cci_reg_sequence awb_reg_seq[] = {
> + {GC0308_AWB_R_GAIN, regs->r},
> + {GC0308_AWB_G_GAIN, regs->g},
> + {GC0308_AWB_B_GAIN, regs->b},
> + };
> + int ret;
> +
> + ret = cci_update_bits(gc0308->regmap, GC0308_AAAA_EN,
> + BIT(1), val == V4L2_WHITE_BALANCE_AUTO, NULL);
> + ret = cci_multi_reg_write(gc0308->regmap, awb_reg_seq,
> + ARRAY_SIZE(awb_reg_seq), &ret);
> +
> + return ret;
> +}
> +
> +static int gc0308_set_colormode(struct gc0308 *gc0308, enum v4l2_colorfx mode)
> +{
> + const struct gc0308_colormode *regs = &gc0308_colormodes[mode];
> + struct cci_reg_sequence colormode_reg_seq[] = {
> + {GC0308_SPECIAL_EFFECT, regs->special_effect},
> + {GC0308_DEBUG_MODE1, regs->dbg_mode1},
> + {GC0308_BLOCK_EN1, regs->block_en1},
> + {GC0308_AEC_MODE3, regs->aec_mode3},
> + {GC0308_EEINTP_MODE_2, regs->eeintp_mode_2},
> + {GC0308_EDGE12_EFFECT, regs->edge12_effect},
> + {GC0308_LUMA_CONTRAST, regs->luma_contrast},
> + {GC0308_CONTRAST_CENTER, regs->contrast_center},
> + {GC0308_FIXED_CB, regs->fixed_cb},
> + {GC0308_FIXED_CR, regs->fixed_cr},
> + };
> +
> + return cci_multi_reg_write(gc0308->regmap, colormode_reg_seq,
> + ARRAY_SIZE(colormode_reg_seq), NULL);
> +}
> +
> +static int gc0308_set_power_line_freq(struct gc0308 *gc0308, int frequency)
> +{
> + static const struct cci_reg_sequence pwr_line_50hz[] = {
> + {GC0308_ANTI_FLICKER_STEP, 0x0078},
> + {GC0308_EXP_LVL_1, 0x0258},
> + {GC0308_EXP_LVL_2, 0x0348},
> + {GC0308_EXP_LVL_3, 0x04b0},
> + {GC0308_EXP_LVL_4, 0x05a0},
> + };
> + static const struct cci_reg_sequence pwr_line_60hz[] = {
> + {GC0308_ANTI_FLICKER_STEP, 0x0064},
> + {GC0308_EXP_LVL_1, 0x0258},
> + {GC0308_EXP_LVL_2, 0x0384},
> + {GC0308_EXP_LVL_3, 0x04b0},
> + {GC0308_EXP_LVL_4, 0x05dc},
> + };
> +
> + switch (frequency) {
> + case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
> + return cci_multi_reg_write(gc0308->regmap, pwr_line_60hz,
> + ARRAY_SIZE(pwr_line_60hz), NULL);
> + case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
> + return cci_multi_reg_write(gc0308->regmap, pwr_line_50hz,
> + ARRAY_SIZE(pwr_line_50hz), NULL);
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int gc0308_update_mirror(struct gc0308 *gc0308)
> +{
> + u8 regval = 0x00;
> +
> + if (gc0308->vflip->val)
> + regval |= BIT(1);
> +
> + if (gc0308->hflip->val)
> + regval |= BIT(0);
> +
> + return cci_update_bits(gc0308->regmap, GC0308_CISCTL_MODE1,
> + GENMASK(1, 0), regval, NULL);
> +}
> +
> +static int gc0308_update_blanking(struct gc0308 *gc0308)
> +{
> + u16 vblank = gc0308->vblank->val;
> + u16 hblank = gc0308->hblank->val;
> + u8 vbhb = ((vblank >> 4) & 0xf0) | ((hblank >> 8) & 0x0f);
> + int ret = 0;
> +
> + cci_write(gc0308->regmap, GC0308_VB_HB, vbhb, &ret);
> + cci_write(gc0308->regmap, GC0308_HBLANK, hblank & 0xff, &ret);
> + cci_write(gc0308->regmap, GC0308_VBLANK, vblank & 0xff, &ret);
> +
> + return ret;
> +}
> +
> +static int _gc0308_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct gc0308 *gc0308 = container_of(ctrl->handler, struct gc0308, hdl);
> + uint8_t flipval = ctrl->val ? 0xff : 0x00;
> +
> + switch (ctrl->id) {
> + case V4L2_CID_HBLANK:
> + case V4L2_CID_VBLANK:
> + return gc0308_update_blanking(gc0308);
> + case V4L2_CID_VFLIP:
> + case V4L2_CID_HFLIP:
> + return gc0308_update_mirror(gc0308);
> + case V4L2_CID_AUTO_WHITE_BALANCE:
> + return cci_update_bits(gc0308->regmap, GC0308_AAAA_EN,
> + BIT(1), flipval, NULL);
> + case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
> + return gc0308_set_awb_mode(gc0308, ctrl->val);
> + case V4L2_CID_POWER_LINE_FREQUENCY:
> + return gc0308_set_power_line_freq(gc0308, ctrl->val);
> + case V4L2_CID_COLORFX:
> + return gc0308_set_colormode(gc0308, ctrl->val);
> + case V4L2_CID_TEST_PATTERN:
> + return cci_update_bits(gc0308->regmap, GC0308_DEBUG_MODE2,
> + GENMASK(1, 0), ctrl->val, NULL);
> + case V4L2_CID_AUTO_EXPOSURE_BIAS:
> + return gc0308_set_exposure(gc0308, ctrl->val);
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int gc0308_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct gc0308 *gc0308 = container_of(ctrl->handler, struct gc0308, hdl);
> + int ret;
> +
> + if (!pm_runtime_get_if_in_use(gc0308->dev))
> + return 0;
> +
> + ret = _gc0308_s_ctrl(ctrl);
> +
> + if (ret)
> + dev_err(gc0308->dev, "failed to set control: %d\n", ret);
> +
> + pm_runtime_mark_last_busy(gc0308->dev);
> + pm_runtime_put_autosuspend(gc0308->dev);
> +
> + return ret;
> +}
> +
> +static const struct v4l2_ctrl_ops gc0308_ctrl_ops = {
> + .s_ctrl = gc0308_s_ctrl,
> +};
> +
> +static const struct v4l2_subdev_core_ops gc0308_core_ops = {
> + .log_status = v4l2_ctrl_subdev_log_status,
> + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> + .g_register = gc0308_g_register,
> + .s_register = gc0308_s_register,
> +#endif
> +};
> +
> +static int gc0308_enum_mbus_code(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_mbus_code_enum *code)
> +{
> + if (code->index >= ARRAY_SIZE(gc0308_formats))
> + return -EINVAL;
> +
> + code->code = gc0308_formats[code->index].code;
> +
> + return 0;
> +}
> +
> +static bool gc0308_is_valid_format(u32 code)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(gc0308_formats); i++) {
> + if (gc0308_formats[i].code == code)
> + return true;
> + }
> +
> + return false;
> +}
> +
> +static int gc0308_enum_frame_size(struct v4l2_subdev *subdev,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_frame_size_enum *fse)
> +{
> + if (fse->index >= ARRAY_SIZE(gc0308_frame_sizes))
> + return -EINVAL;
> +
> + if (!gc0308_is_valid_format(fse->code))
> + return -EINVAL;
> +
> + fse->min_width = gc0308_frame_sizes[fse->index].width;
> + fse->max_width = gc0308_frame_sizes[fse->index].width;
> + fse->min_height = gc0308_frame_sizes[fse->index].height;
> + fse->max_height = gc0308_frame_sizes[fse->index].height;
> +
> + return 0;
> +}
> +
> +static void gc0308_update_pad_format(const struct gc0308_frame_size *mode,
> + struct v4l2_mbus_framefmt *fmt, u32 code)
> +{
> + fmt->width = mode->width;
> + fmt->height = mode->height;
> + fmt->code = code;
> + fmt->field = V4L2_FIELD_NONE;
> + fmt->colorspace = V4L2_COLORSPACE_SRGB;
> +}
> +
> +static int gc0308_set_format(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_format *fmt)
> +{
> + struct gc0308 *gc0308 = to_gc0308(sd);
> + const struct gc0308_frame_size *mode;
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(gc0308_formats); i++) {
> + if (fmt->format.code == gc0308_formats[i].code)
> + break;
> + }
> +
> + if (i >= ARRAY_SIZE(gc0308_formats)) {
> + dev_warn(gc0308->dev, "unsupported format code: %08x\n",
> + fmt->format.code);
> + i = 0;
> + }
> +
> + mode = v4l2_find_nearest_size(gc0308_frame_sizes,
> + ARRAY_SIZE(gc0308_frame_sizes), width,
> + height, fmt->format.width,
> + fmt->format.height);
> +
> + gc0308_update_pad_format(mode, &fmt->format, gc0308_formats[i].code);
> + *v4l2_subdev_get_pad_format(sd, sd_state, fmt->pad) = fmt->format;
> +
> + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
> + return 0;
> +
> + gc0308->mode.out_format = gc0308_formats[i].regval;
> + gc0308->mode.subsample = mode->subsample;
> + gc0308->mode.width = mode->width;
> + gc0308->mode.height = mode->height;
> +
> + return 0;
> +}
> +
> +static int gc0308_init_cfg(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state)
> +{
> + struct v4l2_mbus_framefmt *format =
> + v4l2_subdev_get_try_format(sd, sd_state, 0);
> +
> + format->width = 640;
> + format->height = 480;
> + format->code = gc0308_formats[0].code;
> + format->colorspace = V4L2_COLORSPACE_SRGB;
> + format->field = V4L2_FIELD_NONE;
> + format->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
> + format->quantization = V4L2_QUANTIZATION_DEFAULT;
> + format->xfer_func = V4L2_XFER_FUNC_DEFAULT;
> +
> + return 0;
> +}
> +
> +static const struct v4l2_subdev_pad_ops gc0308_pad_ops = {
> + .init_cfg = gc0308_init_cfg,
> + .enum_mbus_code = gc0308_enum_mbus_code,
> + .enum_frame_size = gc0308_enum_frame_size,
> + .get_fmt = v4l2_subdev_get_fmt,
> + .set_fmt = gc0308_set_format,
> +};
> +
> +static int gc0308_set_resolution(struct gc0308 *gc0308, int *ret)
> +{
> + struct cci_reg_sequence resolution_regs[] = {
> + {GC0308_SUBSAMPLE, gc0308->mode.subsample},
> + {GC0308_SUBMODE, 0x03},
> + {GC0308_SUB_ROW_N1, 0x00},
> + {GC0308_SUB_ROW_N2, 0x00},
> + {GC0308_SUB_COL_N1, 0x00},
> + {GC0308_SUB_COL_N2, 0x00},
> + {GC0308_CROP_WIN_MODE, 0x80},
> + {GC0308_CROP_WIN_Y1, 0x00},
> + {GC0308_CROP_WIN_X1, 0x00},
> + {GC0308_CROP_WIN_HEIGHT, gc0308->mode.height},
> + {GC0308_CROP_WIN_WIDTH, gc0308->mode.width},
> + };
> +
> + return cci_multi_reg_write(gc0308->regmap, resolution_regs,
> + ARRAY_SIZE(resolution_regs), ret);
> +}
> +
> +static int gc0308_start_stream(struct gc0308 *gc0308)
> +{
> + int ret, sync_mode;
> +
> + ret = pm_runtime_resume_and_get(gc0308->dev);
> + if (ret < 0)
> + return ret;
> +
> + cci_multi_reg_write(gc0308->regmap, sensor_default_regs,
> + ARRAY_SIZE(sensor_default_regs), &ret);
> + cci_update_bits(gc0308->regmap, GC0308_OUT_FORMAT,
> + GENMASK(4, 0), gc0308->mode.out_format, &ret);
> + gc0308_set_resolution(gc0308, &ret);
> +
> + if (ret) {
> + dev_err(gc0308->dev, "failed to update registers: %d\n", ret);
> + goto disable_pm;
> + }
> +
> + ret = __v4l2_ctrl_handler_setup(&gc0308->hdl);
> + if (ret) {
> + dev_err(gc0308->dev, "failed to setup controls\n");
> + goto disable_pm;
> + }
> +
> + /* HSYNC/VSYNC polarity */
> + sync_mode = 0x3;
> + if (gc0308->mbus_config & V4L2_MBUS_VSYNC_ACTIVE_LOW)
> + sync_mode &= ~BIT(0);
> + if (gc0308->mbus_config & V4L2_MBUS_HSYNC_ACTIVE_LOW)
> + sync_mode &= ~BIT(1);
> + ret = cci_write(gc0308->regmap, GC0308_SYNC_MODE, sync_mode, NULL);
> + if (ret)
> + goto disable_pm;
> +
> + return 0;
> +
> +disable_pm:
> + pm_runtime_mark_last_busy(gc0308->dev);
> + pm_runtime_put_autosuspend(gc0308->dev);
> + return ret;
> +}
> +
> +static int gc0308_stop_stream(struct gc0308 *gc0308)
> +{
> + pm_runtime_mark_last_busy(gc0308->dev);
> + pm_runtime_put_autosuspend(gc0308->dev);
> + return 0;
> +}
> +
> +static int gc0308_s_stream(struct v4l2_subdev *sd, int enable)
> +{
> + struct gc0308 *gc0308 = to_gc0308(sd);
> + struct v4l2_subdev_state *sd_state;
> + int ret;
> +
> + sd_state = v4l2_subdev_lock_and_get_active_state(sd);
> +
> + if (enable)
> + ret = gc0308_start_stream(gc0308);
> + else
> + ret = gc0308_stop_stream(gc0308);
> +
> + v4l2_subdev_unlock_state(sd_state);
> + return ret;
> +}
> +
> +static const struct v4l2_subdev_video_ops gc0308_video_ops = {
> + .s_stream = gc0308_s_stream,
> +};
> +
> +static const struct v4l2_subdev_ops gc0308_subdev_ops = {
> + .core = &gc0308_core_ops,
> + .pad = &gc0308_pad_ops,
> + .video = &gc0308_video_ops,
> +};
> +
> +static int gc0308_bus_config(struct gc0308 *gc0308)
> +{
> + struct device *dev = gc0308->dev;
> + struct v4l2_fwnode_endpoint bus_cfg = {
> + .bus_type = V4L2_MBUS_PARALLEL
> + };
> + struct fwnode_handle *ep;
> + int ret;
> +
> + ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 0);
> + if (!ep)
> + return -EINVAL;
> +
> + ret = v4l2_fwnode_endpoint_parse(ep, &bus_cfg);
> + fwnode_handle_put(ep);
> + if (ret)
> + return ret;
> +
> + gc0308->mbus_config = bus_cfg.bus.parallel.flags;
> +
> + return 0;
> +}
> +
> +static const char * const gc0308_test_pattern_menu[] = {
> + "Disabled",
> + "Test Image 1",
> + "Test Image 2",
> +};
> +
> +static int gc0308_probe(struct i2c_client *client)
> +{
> + struct device *dev = &client->dev;
> + struct gc0308 *gc0308;
> + unsigned long clkrate;
> + u64 regval;
> + int ret;
> +
> + gc0308 = devm_kzalloc(dev, sizeof(*gc0308), GFP_KERNEL);
> + if (!gc0308)
> + return -ENOMEM;
> +
> + gc0308->dev = dev;
> + dev_set_drvdata(dev, gc0308);
> +
> + ret = gc0308_bus_config(gc0308);
> + if (ret)
> + return dev_err_probe(dev, ret, "failed to get bus config\n");
> +
> + gc0308->clk = devm_clk_get_optional(dev, NULL);
> + if (IS_ERR(gc0308->clk))
> + return dev_err_probe(dev, PTR_ERR(gc0308->clk),
> + "could not get clk\n");
> +
> + gc0308->vdd = devm_regulator_get(dev, "vdd28");
> + if (IS_ERR(gc0308->vdd))
> + return dev_err_probe(dev, PTR_ERR(gc0308->vdd),
> + "failed to get vdd28 regulator\n");
> +
> + gc0308->pwdn_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_LOW);
> + if (IS_ERR(gc0308->pwdn_gpio))
> + return dev_err_probe(dev, PTR_ERR(gc0308->pwdn_gpio),
> + "failed to get powerdown gpio\n");
> +
> + gc0308->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> + if (IS_ERR(gc0308->reset_gpio))
> + return dev_err_probe(dev, PTR_ERR(gc0308->reset_gpio),
> + "failed to get reset gpio\n");
> +
> + /*
> + * This is not using devm_cci_regmap_init_i2c(), because the driver
> + * makes use of regmap's pagination feature. The chosen settings are
> + * compatible with the CCI helpers.
> + */
> + gc0308->regmap = devm_regmap_init_i2c(client, &gc0308_regmap_config);
> + if (IS_ERR(gc0308->regmap))
> + return dev_err_probe(dev, PTR_ERR(gc0308->regmap),
> + "failed to init regmap\n");
> +
> + v4l2_i2c_subdev_init(&gc0308->sd, client, &gc0308_subdev_ops);
> + gc0308->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> + gc0308->sd.flags |= V4L2_SUBDEV_FL_HAS_EVENTS;
> +
> + v4l2_ctrl_handler_init(&gc0308->hdl, 11);
> + gc0308->hblank = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_HBLANK, GC0308_HBLANK_MIN,
> + GC0308_HBLANK_MAX, 1,
> + GC0308_HBLANK_DEF);
> + gc0308->vblank = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_VBLANK, GC0308_VBLANK_MIN,
> + GC0308_VBLANK_MAX, 1,
> + GC0308_VBLANK_DEF);
> + gc0308->hflip = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_HFLIP, 0, 1, 1, 0);
> + gc0308->vflip = v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_VFLIP, 0, 1, 1, 0);
> + v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops, V4L2_CID_PIXEL_RATE,
> + GC0308_PIXEL_RATE, GC0308_PIXEL_RATE, 1,
> + GC0308_PIXEL_RATE);
> + v4l2_ctrl_new_std(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
> + v4l2_ctrl_new_std_menu_items(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_TEST_PATTERN,
> + ARRAY_SIZE(gc0308_test_pattern_menu) - 1,
> + 0, 0, gc0308_test_pattern_menu);
> + v4l2_ctrl_new_std_menu(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
> + 8, ~0x14e, V4L2_WHITE_BALANCE_AUTO);
> + v4l2_ctrl_new_std_menu(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_COLORFX, 8, 0, V4L2_COLORFX_NONE);
> + v4l2_ctrl_new_std_menu(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_POWER_LINE_FREQUENCY,
> + V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
> + ~0x6, V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
> + v4l2_ctrl_new_int_menu(&gc0308->hdl, &gc0308_ctrl_ops,
> + V4L2_CID_AUTO_EXPOSURE_BIAS,
> + ARRAY_SIZE(gc0308_exposure_menu) - 1,
> + ARRAY_SIZE(gc0308_exposure_menu)/2,
> + gc0308_exposure_menu);
> +
> + gc0308->sd.ctrl_handler = &gc0308->hdl;
> + if (gc0308->hdl.error) {
> + ret = gc0308->hdl.error;
> + goto fail_ctrl_hdl_cleanup;
> + }
> +
> + v4l2_ctrl_cluster(2, &gc0308->hflip);
> + v4l2_ctrl_cluster(2, &gc0308->hblank);
> +
> + gc0308->sd.state_lock = gc0308->hdl.lock;
> + gc0308->pad.flags = MEDIA_PAD_FL_SOURCE;
> + gc0308->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> + ret = media_entity_pads_init(&gc0308->sd.entity, 1, &gc0308->pad);
> + if (ret < 0)
> + goto fail_ctrl_hdl_cleanup;
> +
> + ret = v4l2_subdev_init_finalize(&gc0308->sd);
> + if (ret)
> + goto fail_media_entity_cleanup;
> +
> + ret = gc0308_power_on(dev);
> + if (ret)
> + goto fail_subdev_cleanup;
> +
> + if (gc0308->clk) {
> + clkrate = clk_get_rate(gc0308->clk);
> + if (clkrate != 24000000)
> + dev_warn(dev, "unexpected clock rate: %lu\n", clkrate);
> + }
> +
> + ret = cci_read(gc0308->regmap, GC0308_CHIP_ID, &regval, NULL);
> + if (ret < 0) {
> + dev_err_probe(dev, ret, "failed to read chip ID\n");
> + goto fail_power_off;
> + }
> +
> + if (regval != 0x9b) {
> + ret = -EINVAL;
> + dev_err_probe(dev, ret, "invalid chip ID (%02llx)\n", regval);
> + goto fail_power_off;
> + }
> +
> + ret = v4l2_async_register_subdev(&gc0308->sd);
> + if (ret) {
> + dev_err_probe(dev, ret, "failed to register v4l subdev\n");
> + goto fail_power_off;
> + }
> +
> + pm_runtime_set_active(dev);
> + pm_runtime_enable(dev);
> + pm_runtime_set_autosuspend_delay(&client->dev, 1000);
> + pm_runtime_use_autosuspend(&client->dev);
> + pm_runtime_idle(dev);
> +
> + return 0;
> +
> +fail_power_off:
> + gc0308_power_off(dev);
> +fail_subdev_cleanup:
> + v4l2_subdev_cleanup(&gc0308->sd);
> +fail_media_entity_cleanup:
> + media_entity_cleanup(&gc0308->sd.entity);
> +fail_ctrl_hdl_cleanup:
> + v4l2_ctrl_handler_free(&gc0308->hdl);
> + return ret;
> +}
> +
> +static void gc0308_remove(struct i2c_client *client)
> +{
> + struct gc0308 *gc0308 = i2c_get_clientdata(client);
> + struct device *dev = &client->dev;
> +
> + pm_runtime_get_sync(dev);
> +
> + v4l2_async_unregister_subdev(&gc0308->sd);
> + v4l2_ctrl_handler_free(&gc0308->hdl);
> +
> + pm_runtime_disable(dev);
> + pm_runtime_set_suspended(dev);
> + pm_runtime_put_noidle(dev);
> + gc0308_power_off(dev);
> +}
> +
> +static const struct dev_pm_ops gc0308_pm_ops = {
> + SET_RUNTIME_PM_OPS(gc0308_power_off, gc0308_power_on, NULL)
> +};
> +
> +static const struct of_device_id gc0308_of_match[] = {
> + { .compatible = "galaxycore,gc0308" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, gc0308_of_match);
> +
> +static struct i2c_driver gc0308_i2c_driver = {
> + .driver = {
> + .name = "gc0308",
> + .pm = &gc0308_pm_ops,
> + .of_match_table = gc0308_of_match,
> + },
> + .probe = gc0308_probe,
> + .remove = gc0308_remove,
> +};
> +module_i2c_driver(gc0308_i2c_driver);
> +
> +MODULE_DESCRIPTION("GalaxyCore GC0308 Camera Driver");
> +MODULE_AUTHOR("Sebastian Reichel <[email protected]>");
> +MODULE_LICENSE("GPL");
> --
> 2.42.0
>