Signed-off-by: Vinay Simha BN <[email protected]>
---
v1:
Initial version
v2:
* Andrzej Hajda review comments incorporated
SPDX identifier
development debug removed
alphabetic order headers
u32 instead of unit32_t
magic numbers to macros for CLRSI and mux registers
ignored return value
* Laurent Pinchart review comments incorporated
mdelay to usleep_range
bus_formats added
v3:
* Andrzej Hajda review comments incorporated
drm_connector_status removed
u32 rev removed and local variabl is used
regulator enable disable with proper orders and delays
as per the spec
devm_drm_panel_bridge_add method used instead of panel
description modified
dual port implemented
v4:
* Sam Ravnborg review comments incorporated
panel->connector_type removed
* Reported-by: kernel test robot <[email protected]>
parse_dt to static function
removed the if (endpoint), since data-lanes has to be
present for dsi dts ports
---
drivers/gpu/drm/bridge/Kconfig | 10 +
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/tc358775.c | 721 ++++++++++++++++++++++++++++++
3 files changed, 732 insertions(+)
create mode 100644 drivers/gpu/drm/bridge/tc358775.c
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 43271c21d3fc..084e9853944a 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -181,6 +181,16 @@ config DRM_TOSHIBA_TC358768
help
Toshiba TC358768AXBG/TC358778XBG DSI bridge chip driver.
+config DRM_TOSHIBA_TC358775
+ tristate "Toshiba TC358775 LVDS bridge"
+ depends on OF
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ select DRM_PANEL
+ select DRM_MIPI_DSI
+ ---help---
+ Toshiba TC358775 LVDS bridge chip driver.
+
config DRM_TI_TFP410
tristate "TI TFP410 DVI/HDMI bridge"
depends on OF
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index d63d4b7e4347..23c770b3bfe4 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_DRM_THINE_THC63LVD1024) += thc63lvd1024.o
obj-$(CONFIG_DRM_TOSHIBA_TC358764) += tc358764.o
obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
obj-$(CONFIG_DRM_TOSHIBA_TC358768) += tc358768.o
+obj-$(CONFIG_DRM_TOSHIBA_TC358775) += tc358775.o
obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o
obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o
diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
new file mode 100644
index 000000000000..8c9bd4e77bfd
--- /dev/null
+++ b/drivers/gpu/drm/bridge/tc358775.c
@@ -0,0 +1,721 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * tc358775 DSI to LVDS bridge driver
+ *
+ * Copyright (C) 2020 SMART Wireless Computing
+ * Author: Vinay Simha BN <[email protected]>
+ *
+ */
+//#define DEBUG
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_dp_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+
+#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
+#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
+
+/* Registers */
+
+/* DSI D-PHY Layer Registers */
+#define D0W_DPHYCONTTX 0x0004 /* Data Lane 0 DPHY Tx Control */
+#define CLW_DPHYCONTRX 0x0020 /* Clock Lane DPHY Rx Control */
+#define D0W_DPHYCONTRX 0x0024 /* Data Lane 0 DPHY Rx Control */
+#define D1W_DPHYCONTRX 0x0028 /* Data Lane 1 DPHY Rx Control */
+#define D2W_DPHYCONTRX 0x002C /* Data Lane 2 DPHY Rx Control */
+#define D3W_DPHYCONTRX 0x0030 /* Data Lane 3 DPHY Rx Control */
+#define COM_DPHYCONTRX 0x0038 /* DPHY Rx Common Control */
+#define CLW_CNTRL 0x0040 /* Clock Lane Control */
+#define D0W_CNTRL 0x0044 /* Data Lane 0 Control */
+#define D1W_CNTRL 0x0048 /* Data Lane 1 Control */
+#define D2W_CNTRL 0x004C /* Data Lane 2 Control */
+#define D3W_CNTRL 0x0050 /* Data Lane 3 Control */
+#define DFTMODE_CNTRL 0x0054 /* DFT Mode Control */
+
+/* DSI PPI Layer Registers */
+#define PPI_STARTPPI 0x0104 /* START control bit of PPI-TX function. */
+#define PPI_START_FUNCTION 1
+
+#define PPI_BUSYPPI 0x0108
+#define PPI_LINEINITCNT 0x0110 /* Line Initialization Wait Counter */
+#define PPI_LPTXTIMECNT 0x0114
+#define PPI_LANEENABLE 0x0134 /* Enables each lane at the PPI layer. */
+#define PPI_TX_RX_TA 0x013C /* DSI Bus Turn Around timing parameters */
+
+/* Analog timer function enable */
+#define PPI_CLS_ATMR 0x0140 /* Delay for Clock Lane in LPRX */
+#define PPI_D0S_ATMR 0x0144 /* Delay for Data Lane 0 in LPRX */
+#define PPI_D1S_ATMR 0x0148 /* Delay for Data Lane 1 in LPRX */
+#define PPI_D2S_ATMR 0x014C /* Delay for Data Lane 2 in LPRX */
+#define PPI_D3S_ATMR 0x0150 /* Delay for Data Lane 3 in LPRX */
+
+#define PPI_D0S_CLRSIPOCOUNT 0x0164 /* For lane 0 */
+#define PPI_D1S_CLRSIPOCOUNT 0x0168 /* For lane 1 */
+#define PPI_D2S_CLRSIPOCOUNT 0x016C /* For lane 2 */
+#define PPI_D3S_CLRSIPOCOUNT 0x0170 /* For lane 3 */
+
+#define CLS_PRE 0x0180 /* Digital Counter inside of PHY IO */
+#define D0S_PRE 0x0184 /* Digital Counter inside of PHY IO */
+#define D1S_PRE 0x0188 /* Digital Counter inside of PHY IO */
+#define D2S_PRE 0x018C /* Digital Counter inside of PHY IO */
+#define D3S_PRE 0x0190 /* Digital Counter inside of PHY IO */
+#define CLS_PREP 0x01A0 /* Digital Counter inside of PHY IO */
+#define D0S_PREP 0x01A4 /* Digital Counter inside of PHY IO */
+#define D1S_PREP 0x01A8 /* Digital Counter inside of PHY IO */
+#define D2S_PREP 0x01AC /* Digital Counter inside of PHY IO */
+#define D3S_PREP 0x01B0 /* Digital Counter inside of PHY IO */
+#define CLS_ZERO 0x01C0 /* Digital Counter inside of PHY IO */
+#define D0S_ZERO 0x01C4 /* Digital Counter inside of PHY IO */
+#define D1S_ZERO 0x01C8 /* Digital Counter inside of PHY IO */
+#define D2S_ZERO 0x01CC /* Digital Counter inside of PHY IO */
+#define D3S_ZERO 0x01D0 /* Digital Counter inside of PHY IO */
+
+#define PPI_CLRFLG 0x01E0 /* PRE Counters has reached set values */
+#define PPI_CLRSIPO 0x01E4 /* Clear SIPO values, Slave mode use only. */
+#define HSTIMEOUT 0x01F0 /* HS Rx Time Out Counter */
+#define HSTIMEOUTENABLE 0x01F4 /* Enable HS Rx Time Out Counter */
+#define DSI_STARTDSI 0x0204 /* START control bit of DSI-TX function */
+#define DSI_RX_START 1
+
+#define DSI_BUSYDSI 0x0208
+#define DSI_LANEENABLE 0x0210 /* Enables each lane at the Protocol layer. */
+#define DSI_LANESTATUS0 0x0214 /* Displays lane is in HS RX mode. */
+#define DSI_LANESTATUS1 0x0218 /* Displays lane is in ULPS or STOP state */
+
+#define DSI_INTSTATUS 0x0220 /* Interrupt Status */
+#define DSI_INTMASK 0x0224 /* Interrupt Mask */
+#define DSI_INTCLR 0x0228 /* Interrupt Clear */
+#define DSI_LPTXTO 0x0230 /* Low Power Tx Time Out Counter */
+
+#define DSIERRCNT 0x0300 /* DSI Error Count */
+#define APLCTRL 0x0400 /* Application Layer Control */
+#define RDPKTLN 0x0404 /* Command Read Packet Length */
+
+#define VPCTRL 0x0450 /* Video Path Control */
+#define HTIM1 0x0454 /* Horizontal Timing Control 1 */
+#define HTIM2 0x0458 /* Horizontal Timing Control 2 */
+#define VTIM1 0x045C /* Vertical Timing Control 1 */
+#define VTIM2 0x0460 /* Vertical Timing Control 2 */
+#define VFUEN 0x0464 /* Video Frame Timing Update Enable */
+#define VFUEN_EN BIT(0) /* Upload Enable */
+
+/* Mux Input Select for LVDS LINK Input */
+#define LV_MX0003 0x0480 /* Bit 0 to 3 */
+#define LV_MX0407 0x0484 /* Bit 4 to 7 */
+#define LV_MX0811 0x0488 /* Bit 8 to 11 */
+#define LV_MX1215 0x048C /* Bit 12 to 15 */
+#define LV_MX1619 0x0490 /* Bit 16 to 19 */
+#define LV_MX2023 0x0494 /* Bit 20 to 23 */
+#define LV_MX2427 0x0498 /* Bit 24 to 27 */
+#define LV_MX(b0, b1, b2, b3) (FLD_VAL(b0, 4, 0) | FLD_VAL(b1, 12, 8) | \
+ FLD_VAL(b2, 20, 16) | FLD_VAL(b3, 28, 24))
+
+/* Input bit numbers used in mux registers */
+enum {
+ LVI_R0,
+ LVI_R1,
+ LVI_R2,
+ LVI_R3,
+ LVI_R4,
+ LVI_R5,
+ LVI_R6,
+ LVI_R7,
+ LVI_G0,
+ LVI_G1,
+ LVI_G2,
+ LVI_G3,
+ LVI_G4,
+ LVI_G5,
+ LVI_G6,
+ LVI_G7,
+ LVI_B0,
+ LVI_B1,
+ LVI_B2,
+ LVI_B3,
+ LVI_B4,
+ LVI_B5,
+ LVI_B6,
+ LVI_B7,
+ LVI_HS,
+ LVI_VS,
+ LVI_DE,
+ LVI_L0
+};
+
+#define LVCFG 0x049C /* LVDS Configuration */
+#define LVPHY0 0x04A0 /* LVDS PHY 0 */
+#define LV_PHY0_RST(v) FLD_VAL(v, 22, 22) /* PHY reset */
+#define LV_PHY0_IS(v) FLD_VAL(v, 15, 14)
+#define LV_PHY0_ND(v) FLD_VAL(v, 4, 0) /* Frequency range select */
+#define LV_PHY0_PRBS_ON(v) FLD_VAL(v, 20, 16) /* Clock/Data Flag pins */
+
+#define LVPHY1 0x04A4 /* LVDS PHY 1 */
+#define SYSSTAT 0x0500 /* System Status */
+#define SYSRST 0x0504 /* System Reset */
+
+#define SYS_RST_I2CS BIT(0) /* Reset I2C-Slave controller */
+#define SYS_RST_I2CM BIT(1) /* Reset I2C-Master controller */
+#define SYS_RST_LCD BIT(2) /* Reset LCD controller */
+#define SYS_RST_BM BIT(3) /* Reset Bus Management controller */
+#define SYS_RST_DSIRX BIT(4) /* Reset DSI-RX and App controller */
+#define SYS_RST_REG BIT(5) /* Reset Register module */
+
+/* GPIO Registers */
+#define GPIOC 0x0520 /* GPIO Control */
+#define GPIOO 0x0524 /* GPIO Output */
+#define GPIOI 0x0528 /* GPIO Input */
+
+/* I2C Registers */
+#define I2CTIMCTRL 0x0540 /* I2C IF Timing and Enable Control */
+#define I2CMADDR 0x0544 /* I2C Master Addressing */
+#define WDATAQ 0x0548 /* Write Data Queue */
+#define RDATAQ 0x054C /* Read Data Queue */
+
+/* Chip ID and Revision ID Register */
+#define IDREG 0x0580
+
+#define LPX_PERIOD 4
+#define TTA_GET 0x40000
+#define TTA_SURE 6
+
+#define TC358775XBG_ID 0x00007500
+
+/* Debug Registers */
+#define DEBUG00 0x05A0 /* Debug */
+#define DEBUG01 0x05A4 /* LVDS Data */
+
+#define DSI_CLEN_BIT BIT(0)
+#define DIVIDE_BY_3 3 /* PCLK=DCLK/3 */
+#define DIVIDE_BY_6 6 /* PCLK=DCLK/6 */
+#define LVCFG_LVEN_BIT BIT(0)
+
+#define L0EN BIT(1)
+
+#define TC358775_VPCTRL_VSDELAY__MASK 0x3FF00000
+#define TC358775_VPCTRL_VSDELAY__SHIFT 20
+static inline u32 TC358775_VPCTRL_VSDELAY(uint32_t val)
+{
+ return ((val) << TC358775_VPCTRL_VSDELAY__SHIFT) &
+ TC358775_VPCTRL_VSDELAY__MASK;
+}
+
+#define TC358775_VPCTRL_OPXLFMT__MASK 0x00000100
+#define TC358775_VPCTRL_OPXLFMT__SHIFT 8
+static inline u32 TC358775_VPCTRL_OPXLFMT(uint32_t val)
+{
+ return ((val) << TC358775_VPCTRL_OPXLFMT__SHIFT) &
+ TC358775_VPCTRL_OPXLFMT__MASK;
+}
+
+#define TC358775_VPCTRL_MSF__MASK 0x00000001
+#define TC358775_VPCTRL_MSF__SHIFT 0
+static inline u32 TC358775_VPCTRL_MSF(uint32_t val)
+{
+ return ((val) << TC358775_VPCTRL_MSF__SHIFT) &
+ TC358775_VPCTRL_MSF__MASK;
+}
+
+#define TC358775_LVCFG_PCLKDIV__MASK 0x000000f0
+#define TC358775_LVCFG_PCLKDIV__SHIFT 4
+static inline u32 TC358775_LVCFG_PCLKDIV(uint32_t val)
+{
+ return ((val) << TC358775_LVCFG_PCLKDIV__SHIFT) &
+ TC358775_LVCFG_PCLKDIV__MASK;
+}
+
+#define TC358775_LVCFG_LVDLINK__MASK 0x00000002
+#define TC358775_LVCFG_LVDLINK__SHIFT 0
+static inline u32 TC358775_LVCFG_LVDLINK(uint32_t val)
+{
+ return ((val) << TC358775_LVCFG_LVDLINK__SHIFT) &
+ TC358775_LVCFG_LVDLINK__MASK;
+}
+
+enum tc358775_ports {
+ TC358775_DSI_IN,
+ TC358775_LVDS_OUT0,
+ TC358775_LVDS_OUT1,
+};
+
+struct tc_data {
+ struct i2c_client *i2c;
+ struct device *dev;
+
+ struct drm_bridge bridge;
+ struct drm_bridge *panel_bridge;
+
+ struct device_node *host_node;
+ struct mipi_dsi_device *dsi;
+ u8 num_dsi_lanes;
+
+ struct regulator *vdd;
+ struct regulator *vddio;
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *stby_gpio;
+ bool dual_link; /* single-link or dual-link */
+};
+
+static inline struct tc_data *bridge_to_tc(struct drm_bridge *b)
+{
+ return container_of(b, struct tc_data, bridge);
+}
+
+static void tc_bridge_pre_enable(struct drm_bridge *bridge)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ struct device *dev = &tc->dsi->dev;
+ int ret;
+
+ ret = regulator_enable(tc->vddio);
+ if (ret < 0)
+ dev_err(dev, "regulator vddio enable failed, %d\n", ret);
+ usleep_range(10000, 11000);
+
+ ret = regulator_enable(tc->vdd);
+ if (ret < 0)
+ dev_err(dev, "regulator vdd enable failed, %d\n", ret);
+ usleep_range(10000, 11000);
+
+ gpiod_set_value(tc->stby_gpio, 0);
+ usleep_range(10000, 11000);
+
+ gpiod_set_value(tc->reset_gpio, 0);
+ usleep_range(10, 20);
+}
+
+static void tc_bridge_post_disable(struct drm_bridge *bridge)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ struct device *dev = &tc->dsi->dev;
+ int ret;
+
+ ret = regulator_disable(tc->vddio);
+ if (ret < 0)
+ dev_err(dev, "regulator vddio disable failed, %d\n", ret);
+ usleep_range(10000, 11000);
+
+ ret = regulator_disable(tc->vdd);
+ if (ret < 0)
+ dev_err(dev, "regulator vdd disable failed, %d\n", ret);
+ usleep_range(10000, 11000);
+
+ gpiod_set_value(tc->stby_gpio, 1);
+ usleep_range(10000, 11000);
+
+ gpiod_set_value(tc->reset_gpio, 1);
+ usleep_range(10, 20);
+}
+
+static u32 d2l_read(struct i2c_client *i2c, u16 reg)
+{
+ int ret;
+ u8 val[4];
+ u8 addr[] = {(reg >> 8) & 0xff, reg & 0xff};
+ u32 value;
+
+ ret = i2c_master_send(i2c, addr, sizeof(reg));
+ if (ret < 0)
+ goto fail;
+
+ ret = i2c_master_recv(i2c, val, sizeof(value));
+ if (ret < 0)
+ goto fail;
+
+ value = val[3] << 24 | val[2] << 16 | val[1] << 8 | val[0];
+
+ pr_debug("d2l: I2C : reg:%04x value:%08x\n", reg, value);
+
+ return value;
+
+fail:
+ dev_err(&i2c->dev, "Error %d reading from subaddress 0x%x\n",
+ ret, reg);
+ return 0;
+}
+
+static void d2l_write(struct i2c_client *i2c, u16 reg, u32 val)
+{
+ u8 buf[6];
+ int ret;
+
+ buf[0] = reg >> 8;
+ buf[1] = reg & 0xFF;
+ buf[2] = (val >> 0) & 0xFF;
+ buf[3] = (val >> 8) & 0xFF;
+ buf[4] = (val >> 16) & 0xFF;
+ buf[5] = (val >> 24) & 0xFF;
+
+ ret = i2c_master_send(i2c, buf, ARRAY_SIZE(buf));
+ if (ret < 0)
+ dev_err(&i2c->dev, "Error %d writing to subaddress 0x%x\n",
+ ret, reg);
+}
+
+/* helper function to access bus_formats */
+static struct drm_connector *get_connector(struct drm_encoder *encoder)
+{
+ struct drm_device *dev = encoder->dev;
+ struct drm_connector *connector;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ if (connector->encoder == encoder)
+ return connector;
+
+ return NULL;
+}
+
+static void tc_bridge_enable(struct drm_bridge *bridge)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ u32 hbpr, hpw, htime1, hfpr, hsize, htime2;
+ u32 vbpr, vpw, vtime1, vfpr, vsize, vtime2;
+ u32 val = 0;
+ u16 bus_formats;
+ struct drm_display_mode *mode;
+ struct drm_connector *connector = get_connector(bridge->encoder);
+
+ mode = &bridge->encoder->crtc->state->adjusted_mode;
+
+ hbpr = mode->htotal - mode->hsync_end;
+ hpw = mode->hsync_end - mode->hsync_start;
+ vbpr = mode->vtotal - mode->vsync_end;
+ vpw = mode->vsync_end - mode->vsync_start;
+
+ htime1 = (hbpr << 16) + hpw;
+ vtime1 = (vbpr << 16) + vpw;
+
+ hfpr = mode->hsync_start - mode->hdisplay;
+ hsize = mode->hdisplay;
+ vfpr = mode->vsync_start - mode->vdisplay;
+ vsize = mode->vdisplay;
+
+ htime2 = (hfpr << 16) + hsize;
+ vtime2 = (vfpr << 16) + vsize;
+
+ val = d2l_read(tc->i2c, IDREG);
+
+ dev_info(tc->dev, "DSI2LVDS Chip ID.%02x Revision ID. %02x **\n",
+ (val >> 8) & 0xFF, val & 0xFF);
+
+ d2l_write(tc->i2c, SYSRST, SYS_RST_REG | SYS_RST_DSIRX | SYS_RST_BM |
+ SYS_RST_LCD | SYS_RST_I2CM | SYS_RST_I2CS);
+ usleep_range(30000, 40000);
+
+ d2l_write(tc->i2c, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
+ d2l_write(tc->i2c, PPI_LPTXTIMECNT, LPX_PERIOD);
+ d2l_write(tc->i2c, PPI_D0S_CLRSIPOCOUNT, 3);
+ d2l_write(tc->i2c, PPI_D1S_CLRSIPOCOUNT, 3);
+ d2l_write(tc->i2c, PPI_D2S_CLRSIPOCOUNT, 3);
+ d2l_write(tc->i2c, PPI_D3S_CLRSIPOCOUNT, 3);
+
+ val = ((L0EN << tc->num_dsi_lanes) - L0EN) | DSI_CLEN_BIT;
+ d2l_write(tc->i2c, PPI_LANEENABLE, val);
+ d2l_write(tc->i2c, DSI_LANEENABLE, val);
+
+ d2l_write(tc->i2c, PPI_STARTPPI, PPI_START_FUNCTION);
+ d2l_write(tc->i2c, DSI_STARTDSI, DSI_RX_START);
+
+ val = TC358775_VPCTRL_VSDELAY(21);
+
+ bus_formats = connector->display_info.bus_formats[0];
+ dev_dbg(tc->dev, "bus_formats : %04x\n", bus_formats);
+
+ if (bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG ||
+ bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA) {
+ /* RGB888 */
+ val |= TC358775_VPCTRL_OPXLFMT(1);
+ d2l_write(tc->i2c, VPCTRL, val);
+ } else {
+ /* RGB666 */
+ val |= TC358775_VPCTRL_MSF(1);
+ d2l_write(tc->i2c, VPCTRL, val);
+ }
+
+ d2l_write(tc->i2c, HTIM1, htime1);
+ d2l_write(tc->i2c, VTIM1, vtime1);
+ d2l_write(tc->i2c, HTIM2, htime2);
+ d2l_write(tc->i2c, VTIM2, vtime2);
+
+ d2l_write(tc->i2c, VFUEN, VFUEN_EN);
+ d2l_write(tc->i2c, SYSRST, SYS_RST_LCD);
+ d2l_write(tc->i2c, LVPHY0, LV_PHY0_PRBS_ON(4) | LV_PHY0_ND(6));
+
+ /* default jeida-24 */
+ if (bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG) {
+ /* vesa-24 */
+ d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
+ d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_R7, LVI_R5, LVI_G0));
+ d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_G6, LVI_G7));
+ d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
+ d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_B6, LVI_B7, LVI_B1, LVI_B2));
+ d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
+ d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_R6));
+ }
+
+ if (bus_formats == MEDIA_BUS_FMT_RGB666_1X7X3_SPWG) {
+ /* jeida-18 */
+ d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
+ d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_L0, LVI_R5, LVI_G0));
+ d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_L0, LVI_L0));
+ d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
+ d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_L0, LVI_L0, LVI_B1, LVI_B2));
+ d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
+ d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_L0));
+ }
+
+ d2l_write(tc->i2c, VFUEN, VFUEN_EN);
+
+ val = LVCFG_LVEN_BIT;
+ if (tc->dual_link) {
+ val |= TC358775_LVCFG_LVDLINK(1);
+ val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_6);
+ } else {
+ val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_3);
+ }
+
+ d2l_write(tc->i2c, LVCFG, val);
+}
+
+static int tc_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+
+ /* Maximum pixel clock speed 135MHz-single-link/270MHz-dual-link */
+ if ((mode->clock > 135000 && tc->dual_link) ||
+ (mode->clock > 270000 && tc->dual_link))
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static int tc358775_parse_dt(struct device_node *np, struct tc_data *tc)
+{
+ struct device_node *endpoint;
+ struct device_node *parent;
+ struct device_node *remote;
+ struct property *prop;
+ int len;
+
+ endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
+ TC358775_DSI_IN, -1);
+ if (endpoint) {
+ /* dsi0_out node */
+ parent = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+ if (parent) {
+ /* dsi0 port 1 */
+ endpoint = of_graph_get_endpoint_by_regs(parent, 1, -1);
+ of_node_put(parent);
+ prop = of_find_property(endpoint, "data-lanes",
+ &len);
+ of_node_put(endpoint);
+ if (!prop) {
+ dev_err(tc->dev,
+ "failed to find data lane\n");
+ return -EPROBE_DEFER;
+ }
+ }
+ }
+
+ tc->num_dsi_lanes = len / sizeof(u32);
+
+ if (tc->num_dsi_lanes < 1 || tc->num_dsi_lanes > 4)
+ return -EINVAL;
+
+ tc->host_node = of_graph_get_remote_node(np, 0, 0);
+ if (!tc->host_node)
+ return -ENODEV;
+
+ of_node_put(tc->host_node);
+
+ endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
+ TC358775_LVDS_OUT1, -1);
+ if (endpoint) {
+ remote = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+
+ if (remote) {
+ if (of_device_is_available(remote))
+ tc->dual_link = true;
+ of_node_put(remote);
+ }
+ }
+
+ dev_dbg(tc->dev, "no.of dsi lanes: %d\n", tc->num_dsi_lanes);
+ dev_dbg(tc->dev, "operating in %s-link mode\n",
+ tc->dual_link ? "dual" : "single");
+
+ return 0;
+}
+
+static int tc_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ struct device *dev = &tc->i2c->dev;
+ struct mipi_dsi_host *host;
+ struct mipi_dsi_device *dsi;
+ int ret;
+
+ const struct mipi_dsi_device_info info = { .type = "tc358775",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ host = of_find_mipi_dsi_host_by_node(tc->host_node);
+ if (!host) {
+ dev_err(dev, "failed to find dsi host\n");
+ return -EPROBE_DEFER;
+ }
+
+ dsi = mipi_dsi_device_register_full(host, &info);
+ if (IS_ERR(dsi)) {
+ dev_err(dev, "failed to create dsi device\n");
+ ret = PTR_ERR(dsi);
+ goto err_dsi_device;
+ }
+
+ tc->dsi = dsi;
+
+ dsi->lanes = tc->num_dsi_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host\n");
+ goto err_dsi_attach;
+ }
+
+ /* Attach the panel-bridge to the dsi bridge */
+ return drm_bridge_attach(bridge->encoder, tc->panel_bridge,
+ &tc->bridge, flags);
+err_dsi_attach:
+ mipi_dsi_device_unregister(dsi);
+err_dsi_device:
+ return ret;
+}
+
+static const struct drm_bridge_funcs tc_bridge_funcs = {
+ .attach = tc_bridge_attach,
+ .pre_enable = tc_bridge_pre_enable,
+ .enable = tc_bridge_enable,
+ .mode_valid = tc_mode_valid,
+ .post_disable = tc_bridge_post_disable,
+};
+
+static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct drm_panel *panel;
+ struct tc_data *tc;
+ int ret;
+
+ tc = devm_kzalloc(dev, sizeof(*tc), GFP_KERNEL);
+ if (!tc)
+ return -ENOMEM;
+
+ tc->dev = dev;
+ tc->i2c = client;
+
+ ret = drm_of_find_panel_or_bridge(dev->of_node, TC358775_LVDS_OUT0,
+ 0, &panel, NULL);
+ if (ret < 0)
+ return ret;
+ if (!panel)
+ return -ENODEV;
+
+ tc->panel_bridge = devm_drm_panel_bridge_add(dev, panel);
+ if (IS_ERR(tc->panel_bridge))
+ return PTR_ERR(tc->panel_bridge);
+
+ ret = tc358775_parse_dt(dev->of_node, tc);
+ if (ret)
+ return ret;
+
+ tc->vddio = devm_regulator_get(dev, "vddio-supply");
+ if (IS_ERR(tc->vddio)) {
+ ret = PTR_ERR(tc->vddio);
+ dev_err(dev, "vddio-supply not found\n");
+ return ret;
+ }
+
+ tc->vdd = devm_regulator_get(dev, "vdd-supply");
+ if (IS_ERR(tc->vdd)) {
+ ret = PTR_ERR(tc->vddio);
+ dev_err(dev, "vdd-supply not found\n");
+ return ret;
+ }
+
+ tc->stby_gpio = devm_gpiod_get(dev, "stby", GPIOD_OUT_HIGH);
+ if (IS_ERR(tc->stby_gpio)) {
+ ret = PTR_ERR(tc->stby_gpio);
+ dev_err(dev, "cannot get stby-gpio %d\n", ret);
+ return ret;
+ }
+
+ tc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(tc->reset_gpio)) {
+ ret = PTR_ERR(tc->reset_gpio);
+ dev_err(dev, "cannot get reset-gpios %d\n", ret);
+ return ret;
+ }
+
+ tc->bridge.funcs = &tc_bridge_funcs;
+ tc->bridge.of_node = dev->of_node;
+ drm_bridge_add(&tc->bridge);
+
+ i2c_set_clientdata(client, tc);
+
+ return 0;
+}
+
+static int tc_remove(struct i2c_client *client)
+{
+ struct tc_data *tc = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&tc->bridge);
+
+ return 0;
+}
+
+static const struct i2c_device_id tc358775_i2c_ids[] = {
+ { "tc358775", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tc358775_i2c_ids);
+
+static const struct of_device_id tc358775_of_ids[] = {
+ { .compatible = "toshiba,tc358775", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tc358775_of_ids);
+
+static struct i2c_driver tc358775_driver = {
+ .driver = {
+ .name = "tc358775",
+ .of_match_table = tc358775_of_ids,
+ },
+ .id_table = tc358775_i2c_ids,
+ .probe = tc_probe,
+ .remove = tc_remove,
+};
+module_i2c_driver(tc358775_driver);
+
+MODULE_AUTHOR("Vinay Simha BN <[email protected]>");
+MODULE_DESCRIPTION("TC358775 DSI/LVDS bridge driver");
+MODULE_LICENSE("GPL v2");
--
2.17.1
Neil,
yaml is the v3 version, there was no change , so i had not created v4 for yaml
[PATCH v3 2/2] display/drm/bridge: TC358775 DSI/LVDS driver
On Mon, Jun 29, 2020 at 2:08 PM Neil Armstrong <[email protected]> wrote:
>
> Hi,
>
> On 21/06/2020 17:38, Vinay Simha BN wrote:
> > Signed-off-by: Vinay Simha BN <[email protected]>
> >
> > ---
> > v1:
> > Initial version
> >
> > v2:
> > * Andrzej Hajda review comments incorporated
> > SPDX identifier
> > development debug removed
> > alphabetic order headers
> > u32 instead of unit32_t
> > magic numbers to macros for CLRSI and mux registers
> > ignored return value
> >
> > * Laurent Pinchart review comments incorporated
> > mdelay to usleep_range
> > bus_formats added
> >
> > v3:
> > * Andrzej Hajda review comments incorporated
> > drm_connector_status removed
> > u32 rev removed and local variabl is used
> > regulator enable disable with proper orders and delays
> > as per the spec
> > devm_drm_panel_bridge_add method used instead of panel
> > description modified
> > dual port implemented
> >
> > v4:
> > * Sam Ravnborg review comments incorporated
> > panel->connector_type removed
> >
> > * Reported-by: kernel test robot <[email protected]>
> > parse_dt to static function
> > removed the if (endpoint), since data-lanes has to be
> > present for dsi dts ports
>
> I maybe missed something, but you should also post a YAML DT bindings
> file associated to the driver.
>
> Neil
>
>
> > ---
> > drivers/gpu/drm/bridge/Kconfig | 10 +
> > drivers/gpu/drm/bridge/Makefile | 1 +
> > drivers/gpu/drm/bridge/tc358775.c | 721 ++++++++++++++++++++++++++++++
> > 3 files changed, 732 insertions(+)
> > create mode 100644 drivers/gpu/drm/bridge/tc358775.c
> >
> > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> > index 43271c21d3fc..084e9853944a 100644
> > --- a/drivers/gpu/drm/bridge/Kconfig
> > +++ b/drivers/gpu/drm/bridge/Kconfig
> > @@ -181,6 +181,16 @@ config DRM_TOSHIBA_TC358768
> > help
> > Toshiba TC358768AXBG/TC358778XBG DSI bridge chip driver.
> >
> > +config DRM_TOSHIBA_TC358775
> > + tristate "Toshiba TC358775 LVDS bridge"
> > + depends on OF
> > + select DRM_KMS_HELPER
> > + select REGMAP_I2C
> > + select DRM_PANEL
> > + select DRM_MIPI_DSI
> > + ---help---
> > + Toshiba TC358775 LVDS bridge chip driver.
> > +
> > config DRM_TI_TFP410
> > tristate "TI TFP410 DVI/HDMI bridge"
> > depends on OF
> > diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
> > index d63d4b7e4347..23c770b3bfe4 100644
> > --- a/drivers/gpu/drm/bridge/Makefile
> > +++ b/drivers/gpu/drm/bridge/Makefile
> > @@ -15,6 +15,7 @@ obj-$(CONFIG_DRM_THINE_THC63LVD1024) += thc63lvd1024.o
> > obj-$(CONFIG_DRM_TOSHIBA_TC358764) += tc358764.o
> > obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
> > obj-$(CONFIG_DRM_TOSHIBA_TC358768) += tc358768.o
> > +obj-$(CONFIG_DRM_TOSHIBA_TC358775) += tc358775.o
> > obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
> > obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o
> > obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o
> > diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
> > new file mode 100644
> > index 000000000000..8c9bd4e77bfd
> > --- /dev/null
> > +++ b/drivers/gpu/drm/bridge/tc358775.c
> > @@ -0,0 +1,721 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * tc358775 DSI to LVDS bridge driver
> > + *
> > + * Copyright (C) 2020 SMART Wireless Computing
> > + * Author: Vinay Simha BN <[email protected]>
> > + *
> > + */
> > +//#define DEBUG
> > +#include <linux/clk.h>
> > +#include <linux/device.h>
> > +#include <linux/gpio/consumer.h>
> > +#include <linux/i2c.h>
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/regulator/consumer.h>
> > +#include <linux/slab.h>
> > +
> > +#include <drm/drm_atomic_helper.h>
> > +#include <drm/drm_bridge.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_dp_helper.h>
> > +#include <drm/drm_mipi_dsi.h>
> > +#include <drm/drm_of.h>
> > +#include <drm/drm_panel.h>
> > +#include <drm/drm_probe_helper.h>
> > +
> > +#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
> > +#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
> > +
> > +/* Registers */
> > +
> > +/* DSI D-PHY Layer Registers */
> > +#define D0W_DPHYCONTTX 0x0004 /* Data Lane 0 DPHY Tx Control */
> > +#define CLW_DPHYCONTRX 0x0020 /* Clock Lane DPHY Rx Control */
> > +#define D0W_DPHYCONTRX 0x0024 /* Data Lane 0 DPHY Rx Control */
> > +#define D1W_DPHYCONTRX 0x0028 /* Data Lane 1 DPHY Rx Control */
> > +#define D2W_DPHYCONTRX 0x002C /* Data Lane 2 DPHY Rx Control */
> > +#define D3W_DPHYCONTRX 0x0030 /* Data Lane 3 DPHY Rx Control */
> > +#define COM_DPHYCONTRX 0x0038 /* DPHY Rx Common Control */
> > +#define CLW_CNTRL 0x0040 /* Clock Lane Control */
> > +#define D0W_CNTRL 0x0044 /* Data Lane 0 Control */
> > +#define D1W_CNTRL 0x0048 /* Data Lane 1 Control */
> > +#define D2W_CNTRL 0x004C /* Data Lane 2 Control */
> > +#define D3W_CNTRL 0x0050 /* Data Lane 3 Control */
> > +#define DFTMODE_CNTRL 0x0054 /* DFT Mode Control */
> > +
> > +/* DSI PPI Layer Registers */
> > +#define PPI_STARTPPI 0x0104 /* START control bit of PPI-TX function. */
> > +#define PPI_START_FUNCTION 1
> > +
> > +#define PPI_BUSYPPI 0x0108
> > +#define PPI_LINEINITCNT 0x0110 /* Line Initialization Wait Counter */
> > +#define PPI_LPTXTIMECNT 0x0114
> > +#define PPI_LANEENABLE 0x0134 /* Enables each lane at the PPI layer. */
> > +#define PPI_TX_RX_TA 0x013C /* DSI Bus Turn Around timing parameters */
> > +
> > +/* Analog timer function enable */
> > +#define PPI_CLS_ATMR 0x0140 /* Delay for Clock Lane in LPRX */
> > +#define PPI_D0S_ATMR 0x0144 /* Delay for Data Lane 0 in LPRX */
> > +#define PPI_D1S_ATMR 0x0148 /* Delay for Data Lane 1 in LPRX */
> > +#define PPI_D2S_ATMR 0x014C /* Delay for Data Lane 2 in LPRX */
> > +#define PPI_D3S_ATMR 0x0150 /* Delay for Data Lane 3 in LPRX */
> > +
> > +#define PPI_D0S_CLRSIPOCOUNT 0x0164 /* For lane 0 */
> > +#define PPI_D1S_CLRSIPOCOUNT 0x0168 /* For lane 1 */
> > +#define PPI_D2S_CLRSIPOCOUNT 0x016C /* For lane 2 */
> > +#define PPI_D3S_CLRSIPOCOUNT 0x0170 /* For lane 3 */
> > +
> > +#define CLS_PRE 0x0180 /* Digital Counter inside of PHY IO */
> > +#define D0S_PRE 0x0184 /* Digital Counter inside of PHY IO */
> > +#define D1S_PRE 0x0188 /* Digital Counter inside of PHY IO */
> > +#define D2S_PRE 0x018C /* Digital Counter inside of PHY IO */
> > +#define D3S_PRE 0x0190 /* Digital Counter inside of PHY IO */
> > +#define CLS_PREP 0x01A0 /* Digital Counter inside of PHY IO */
> > +#define D0S_PREP 0x01A4 /* Digital Counter inside of PHY IO */
> > +#define D1S_PREP 0x01A8 /* Digital Counter inside of PHY IO */
> > +#define D2S_PREP 0x01AC /* Digital Counter inside of PHY IO */
> > +#define D3S_PREP 0x01B0 /* Digital Counter inside of PHY IO */
> > +#define CLS_ZERO 0x01C0 /* Digital Counter inside of PHY IO */
> > +#define D0S_ZERO 0x01C4 /* Digital Counter inside of PHY IO */
> > +#define D1S_ZERO 0x01C8 /* Digital Counter inside of PHY IO */
> > +#define D2S_ZERO 0x01CC /* Digital Counter inside of PHY IO */
> > +#define D3S_ZERO 0x01D0 /* Digital Counter inside of PHY IO */
> > +
> > +#define PPI_CLRFLG 0x01E0 /* PRE Counters has reached set values */
> > +#define PPI_CLRSIPO 0x01E4 /* Clear SIPO values, Slave mode use only. */
> > +#define HSTIMEOUT 0x01F0 /* HS Rx Time Out Counter */
> > +#define HSTIMEOUTENABLE 0x01F4 /* Enable HS Rx Time Out Counter */
> > +#define DSI_STARTDSI 0x0204 /* START control bit of DSI-TX function */
> > +#define DSI_RX_START 1
> > +
> > +#define DSI_BUSYDSI 0x0208
> > +#define DSI_LANEENABLE 0x0210 /* Enables each lane at the Protocol layer. */
> > +#define DSI_LANESTATUS0 0x0214 /* Displays lane is in HS RX mode. */
> > +#define DSI_LANESTATUS1 0x0218 /* Displays lane is in ULPS or STOP state */
> > +
> > +#define DSI_INTSTATUS 0x0220 /* Interrupt Status */
> > +#define DSI_INTMASK 0x0224 /* Interrupt Mask */
> > +#define DSI_INTCLR 0x0228 /* Interrupt Clear */
> > +#define DSI_LPTXTO 0x0230 /* Low Power Tx Time Out Counter */
> > +
> > +#define DSIERRCNT 0x0300 /* DSI Error Count */
> > +#define APLCTRL 0x0400 /* Application Layer Control */
> > +#define RDPKTLN 0x0404 /* Command Read Packet Length */
> > +
> > +#define VPCTRL 0x0450 /* Video Path Control */
> > +#define HTIM1 0x0454 /* Horizontal Timing Control 1 */
> > +#define HTIM2 0x0458 /* Horizontal Timing Control 2 */
> > +#define VTIM1 0x045C /* Vertical Timing Control 1 */
> > +#define VTIM2 0x0460 /* Vertical Timing Control 2 */
> > +#define VFUEN 0x0464 /* Video Frame Timing Update Enable */
> > +#define VFUEN_EN BIT(0) /* Upload Enable */
> > +
> > +/* Mux Input Select for LVDS LINK Input */
> > +#define LV_MX0003 0x0480 /* Bit 0 to 3 */
> > +#define LV_MX0407 0x0484 /* Bit 4 to 7 */
> > +#define LV_MX0811 0x0488 /* Bit 8 to 11 */
> > +#define LV_MX1215 0x048C /* Bit 12 to 15 */
> > +#define LV_MX1619 0x0490 /* Bit 16 to 19 */
> > +#define LV_MX2023 0x0494 /* Bit 20 to 23 */
> > +#define LV_MX2427 0x0498 /* Bit 24 to 27 */
> > +#define LV_MX(b0, b1, b2, b3) (FLD_VAL(b0, 4, 0) | FLD_VAL(b1, 12, 8) | \
> > + FLD_VAL(b2, 20, 16) | FLD_VAL(b3, 28, 24))
> > +
> > +/* Input bit numbers used in mux registers */
> > +enum {
> > + LVI_R0,
> > + LVI_R1,
> > + LVI_R2,
> > + LVI_R3,
> > + LVI_R4,
> > + LVI_R5,
> > + LVI_R6,
> > + LVI_R7,
> > + LVI_G0,
> > + LVI_G1,
> > + LVI_G2,
> > + LVI_G3,
> > + LVI_G4,
> > + LVI_G5,
> > + LVI_G6,
> > + LVI_G7,
> > + LVI_B0,
> > + LVI_B1,
> > + LVI_B2,
> > + LVI_B3,
> > + LVI_B4,
> > + LVI_B5,
> > + LVI_B6,
> > + LVI_B7,
> > + LVI_HS,
> > + LVI_VS,
> > + LVI_DE,
> > + LVI_L0
> > +};
> > +
> > +#define LVCFG 0x049C /* LVDS Configuration */
> > +#define LVPHY0 0x04A0 /* LVDS PHY 0 */
> > +#define LV_PHY0_RST(v) FLD_VAL(v, 22, 22) /* PHY reset */
> > +#define LV_PHY0_IS(v) FLD_VAL(v, 15, 14)
> > +#define LV_PHY0_ND(v) FLD_VAL(v, 4, 0) /* Frequency range select */
> > +#define LV_PHY0_PRBS_ON(v) FLD_VAL(v, 20, 16) /* Clock/Data Flag pins */
> > +
> > +#define LVPHY1 0x04A4 /* LVDS PHY 1 */
> > +#define SYSSTAT 0x0500 /* System Status */
> > +#define SYSRST 0x0504 /* System Reset */
> > +
> > +#define SYS_RST_I2CS BIT(0) /* Reset I2C-Slave controller */
> > +#define SYS_RST_I2CM BIT(1) /* Reset I2C-Master controller */
> > +#define SYS_RST_LCD BIT(2) /* Reset LCD controller */
> > +#define SYS_RST_BM BIT(3) /* Reset Bus Management controller */
> > +#define SYS_RST_DSIRX BIT(4) /* Reset DSI-RX and App controller */
> > +#define SYS_RST_REG BIT(5) /* Reset Register module */
> > +
> > +/* GPIO Registers */
> > +#define GPIOC 0x0520 /* GPIO Control */
> > +#define GPIOO 0x0524 /* GPIO Output */
> > +#define GPIOI 0x0528 /* GPIO Input */
> > +
> > +/* I2C Registers */
> > +#define I2CTIMCTRL 0x0540 /* I2C IF Timing and Enable Control */
> > +#define I2CMADDR 0x0544 /* I2C Master Addressing */
> > +#define WDATAQ 0x0548 /* Write Data Queue */
> > +#define RDATAQ 0x054C /* Read Data Queue */
> > +
> > +/* Chip ID and Revision ID Register */
> > +#define IDREG 0x0580
> > +
> > +#define LPX_PERIOD 4
> > +#define TTA_GET 0x40000
> > +#define TTA_SURE 6
> > +
> > +#define TC358775XBG_ID 0x00007500
> > +
> > +/* Debug Registers */
> > +#define DEBUG00 0x05A0 /* Debug */
> > +#define DEBUG01 0x05A4 /* LVDS Data */
> > +
> > +#define DSI_CLEN_BIT BIT(0)
> > +#define DIVIDE_BY_3 3 /* PCLK=DCLK/3 */
> > +#define DIVIDE_BY_6 6 /* PCLK=DCLK/6 */
> > +#define LVCFG_LVEN_BIT BIT(0)
> > +
> > +#define L0EN BIT(1)
> > +
> > +#define TC358775_VPCTRL_VSDELAY__MASK 0x3FF00000
> > +#define TC358775_VPCTRL_VSDELAY__SHIFT 20
> > +static inline u32 TC358775_VPCTRL_VSDELAY(uint32_t val)
> > +{
> > + return ((val) << TC358775_VPCTRL_VSDELAY__SHIFT) &
> > + TC358775_VPCTRL_VSDELAY__MASK;
> > +}
> > +
> > +#define TC358775_VPCTRL_OPXLFMT__MASK 0x00000100
> > +#define TC358775_VPCTRL_OPXLFMT__SHIFT 8
> > +static inline u32 TC358775_VPCTRL_OPXLFMT(uint32_t val)
> > +{
> > + return ((val) << TC358775_VPCTRL_OPXLFMT__SHIFT) &
> > + TC358775_VPCTRL_OPXLFMT__MASK;
> > +}
> > +
> > +#define TC358775_VPCTRL_MSF__MASK 0x00000001
> > +#define TC358775_VPCTRL_MSF__SHIFT 0
> > +static inline u32 TC358775_VPCTRL_MSF(uint32_t val)
> > +{
> > + return ((val) << TC358775_VPCTRL_MSF__SHIFT) &
> > + TC358775_VPCTRL_MSF__MASK;
> > +}
> > +
> > +#define TC358775_LVCFG_PCLKDIV__MASK 0x000000f0
> > +#define TC358775_LVCFG_PCLKDIV__SHIFT 4
> > +static inline u32 TC358775_LVCFG_PCLKDIV(uint32_t val)
> > +{
> > + return ((val) << TC358775_LVCFG_PCLKDIV__SHIFT) &
> > + TC358775_LVCFG_PCLKDIV__MASK;
> > +}
> > +
> > +#define TC358775_LVCFG_LVDLINK__MASK 0x00000002
> > +#define TC358775_LVCFG_LVDLINK__SHIFT 0
> > +static inline u32 TC358775_LVCFG_LVDLINK(uint32_t val)
> > +{
> > + return ((val) << TC358775_LVCFG_LVDLINK__SHIFT) &
> > + TC358775_LVCFG_LVDLINK__MASK;
> > +}
> > +
> > +enum tc358775_ports {
> > + TC358775_DSI_IN,
> > + TC358775_LVDS_OUT0,
> > + TC358775_LVDS_OUT1,
> > +};
> > +
> > +struct tc_data {
> > + struct i2c_client *i2c;
> > + struct device *dev;
> > +
> > + struct drm_bridge bridge;
> > + struct drm_bridge *panel_bridge;
> > +
> > + struct device_node *host_node;
> > + struct mipi_dsi_device *dsi;
> > + u8 num_dsi_lanes;
> > +
> > + struct regulator *vdd;
> > + struct regulator *vddio;
> > + struct gpio_desc *reset_gpio;
> > + struct gpio_desc *stby_gpio;
> > + bool dual_link; /* single-link or dual-link */
> > +};
> > +
> > +static inline struct tc_data *bridge_to_tc(struct drm_bridge *b)
> > +{
> > + return container_of(b, struct tc_data, bridge);
> > +}
> > +
> > +static void tc_bridge_pre_enable(struct drm_bridge *bridge)
> > +{
> > + struct tc_data *tc = bridge_to_tc(bridge);
> > + struct device *dev = &tc->dsi->dev;
> > + int ret;
> > +
> > + ret = regulator_enable(tc->vddio);
> > + if (ret < 0)
> > + dev_err(dev, "regulator vddio enable failed, %d\n", ret);
> > + usleep_range(10000, 11000);
> > +
> > + ret = regulator_enable(tc->vdd);
> > + if (ret < 0)
> > + dev_err(dev, "regulator vdd enable failed, %d\n", ret);
> > + usleep_range(10000, 11000);
> > +
> > + gpiod_set_value(tc->stby_gpio, 0);
> > + usleep_range(10000, 11000);
> > +
> > + gpiod_set_value(tc->reset_gpio, 0);
> > + usleep_range(10, 20);
> > +}
> > +
> > +static void tc_bridge_post_disable(struct drm_bridge *bridge)
> > +{
> > + struct tc_data *tc = bridge_to_tc(bridge);
> > + struct device *dev = &tc->dsi->dev;
> > + int ret;
> > +
> > + ret = regulator_disable(tc->vddio);
> > + if (ret < 0)
> > + dev_err(dev, "regulator vddio disable failed, %d\n", ret);
> > + usleep_range(10000, 11000);
> > +
> > + ret = regulator_disable(tc->vdd);
> > + if (ret < 0)
> > + dev_err(dev, "regulator vdd disable failed, %d\n", ret);
> > + usleep_range(10000, 11000);
> > +
> > + gpiod_set_value(tc->stby_gpio, 1);
> > + usleep_range(10000, 11000);
> > +
> > + gpiod_set_value(tc->reset_gpio, 1);
> > + usleep_range(10, 20);
> > +}
> > +
> > +static u32 d2l_read(struct i2c_client *i2c, u16 reg)
> > +{
> > + int ret;
> > + u8 val[4];
> > + u8 addr[] = {(reg >> 8) & 0xff, reg & 0xff};
> > + u32 value;
> > +
> > + ret = i2c_master_send(i2c, addr, sizeof(reg));
> > + if (ret < 0)
> > + goto fail;
> > +
> > + ret = i2c_master_recv(i2c, val, sizeof(value));
> > + if (ret < 0)
> > + goto fail;
> > +
> > + value = val[3] << 24 | val[2] << 16 | val[1] << 8 | val[0];
> > +
> > + pr_debug("d2l: I2C : reg:%04x value:%08x\n", reg, value);
> > +
> > + return value;
> > +
> > +fail:
> > + dev_err(&i2c->dev, "Error %d reading from subaddress 0x%x\n",
> > + ret, reg);
> > + return 0;
> > +}
> > +
> > +static void d2l_write(struct i2c_client *i2c, u16 reg, u32 val)
> > +{
> > + u8 buf[6];
> > + int ret;
> > +
> > + buf[0] = reg >> 8;
> > + buf[1] = reg & 0xFF;
> > + buf[2] = (val >> 0) & 0xFF;
> > + buf[3] = (val >> 8) & 0xFF;
> > + buf[4] = (val >> 16) & 0xFF;
> > + buf[5] = (val >> 24) & 0xFF;
> > +
> > + ret = i2c_master_send(i2c, buf, ARRAY_SIZE(buf));
> > + if (ret < 0)
> > + dev_err(&i2c->dev, "Error %d writing to subaddress 0x%x\n",
> > + ret, reg);
> > +}
> > +
> > +/* helper function to access bus_formats */
> > +static struct drm_connector *get_connector(struct drm_encoder *encoder)
> > +{
> > + struct drm_device *dev = encoder->dev;
> > + struct drm_connector *connector;
> > +
> > + list_for_each_entry(connector, &dev->mode_config.connector_list, head)
> > + if (connector->encoder == encoder)
> > + return connector;
> > +
> > + return NULL;
> > +}
> > +
> > +static void tc_bridge_enable(struct drm_bridge *bridge)
> > +{
> > + struct tc_data *tc = bridge_to_tc(bridge);
> > + u32 hbpr, hpw, htime1, hfpr, hsize, htime2;
> > + u32 vbpr, vpw, vtime1, vfpr, vsize, vtime2;
> > + u32 val = 0;
> > + u16 bus_formats;
> > + struct drm_display_mode *mode;
> > + struct drm_connector *connector = get_connector(bridge->encoder);
> > +
> > + mode = &bridge->encoder->crtc->state->adjusted_mode;
> > +
> > + hbpr = mode->htotal - mode->hsync_end;
> > + hpw = mode->hsync_end - mode->hsync_start;
> > + vbpr = mode->vtotal - mode->vsync_end;
> > + vpw = mode->vsync_end - mode->vsync_start;
> > +
> > + htime1 = (hbpr << 16) + hpw;
> > + vtime1 = (vbpr << 16) + vpw;
> > +
> > + hfpr = mode->hsync_start - mode->hdisplay;
> > + hsize = mode->hdisplay;
> > + vfpr = mode->vsync_start - mode->vdisplay;
> > + vsize = mode->vdisplay;
> > +
> > + htime2 = (hfpr << 16) + hsize;
> > + vtime2 = (vfpr << 16) + vsize;
> > +
> > + val = d2l_read(tc->i2c, IDREG);
> > +
> > + dev_info(tc->dev, "DSI2LVDS Chip ID.%02x Revision ID. %02x **\n",
> > + (val >> 8) & 0xFF, val & 0xFF);
> > +
> > + d2l_write(tc->i2c, SYSRST, SYS_RST_REG | SYS_RST_DSIRX | SYS_RST_BM |
> > + SYS_RST_LCD | SYS_RST_I2CM | SYS_RST_I2CS);
> > + usleep_range(30000, 40000);
> > +
> > + d2l_write(tc->i2c, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
> > + d2l_write(tc->i2c, PPI_LPTXTIMECNT, LPX_PERIOD);
> > + d2l_write(tc->i2c, PPI_D0S_CLRSIPOCOUNT, 3);
> > + d2l_write(tc->i2c, PPI_D1S_CLRSIPOCOUNT, 3);
> > + d2l_write(tc->i2c, PPI_D2S_CLRSIPOCOUNT, 3);
> > + d2l_write(tc->i2c, PPI_D3S_CLRSIPOCOUNT, 3);
> > +
> > + val = ((L0EN << tc->num_dsi_lanes) - L0EN) | DSI_CLEN_BIT;
> > + d2l_write(tc->i2c, PPI_LANEENABLE, val);
> > + d2l_write(tc->i2c, DSI_LANEENABLE, val);
> > +
> > + d2l_write(tc->i2c, PPI_STARTPPI, PPI_START_FUNCTION);
> > + d2l_write(tc->i2c, DSI_STARTDSI, DSI_RX_START);
> > +
> > + val = TC358775_VPCTRL_VSDELAY(21);
> > +
> > + bus_formats = connector->display_info.bus_formats[0];
> > + dev_dbg(tc->dev, "bus_formats : %04x\n", bus_formats);
> > +
> > + if (bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG ||
> > + bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA) {
> > + /* RGB888 */
> > + val |= TC358775_VPCTRL_OPXLFMT(1);
> > + d2l_write(tc->i2c, VPCTRL, val);
> > + } else {
> > + /* RGB666 */
> > + val |= TC358775_VPCTRL_MSF(1);
> > + d2l_write(tc->i2c, VPCTRL, val);
> > + }
> > +
> > + d2l_write(tc->i2c, HTIM1, htime1);
> > + d2l_write(tc->i2c, VTIM1, vtime1);
> > + d2l_write(tc->i2c, HTIM2, htime2);
> > + d2l_write(tc->i2c, VTIM2, vtime2);
> > +
> > + d2l_write(tc->i2c, VFUEN, VFUEN_EN);
> > + d2l_write(tc->i2c, SYSRST, SYS_RST_LCD);
> > + d2l_write(tc->i2c, LVPHY0, LV_PHY0_PRBS_ON(4) | LV_PHY0_ND(6));
> > +
> > + /* default jeida-24 */
> > + if (bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG) {
> > + /* vesa-24 */
> > + d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
> > + d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_R7, LVI_R5, LVI_G0));
> > + d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_G6, LVI_G7));
> > + d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
> > + d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_B6, LVI_B7, LVI_B1, LVI_B2));
> > + d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
> > + d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_R6));
> > + }
> > +
> > + if (bus_formats == MEDIA_BUS_FMT_RGB666_1X7X3_SPWG) {
> > + /* jeida-18 */
> > + d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
> > + d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_L0, LVI_R5, LVI_G0));
> > + d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_L0, LVI_L0));
> > + d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
> > + d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_L0, LVI_L0, LVI_B1, LVI_B2));
> > + d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
> > + d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_L0));
> > + }
> > +
> > + d2l_write(tc->i2c, VFUEN, VFUEN_EN);
> > +
> > + val = LVCFG_LVEN_BIT;
> > + if (tc->dual_link) {
> > + val |= TC358775_LVCFG_LVDLINK(1);
> > + val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_6);
> > + } else {
> > + val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_3);
> > + }
> > +
> > + d2l_write(tc->i2c, LVCFG, val);
> > +}
> > +
> > +static int tc_mode_valid(struct drm_bridge *bridge,
> > + const struct drm_display_mode *mode)
> > +{
> > + struct tc_data *tc = bridge_to_tc(bridge);
> > +
> > + /* Maximum pixel clock speed 135MHz-single-link/270MHz-dual-link */
> > + if ((mode->clock > 135000 && tc->dual_link) ||
> > + (mode->clock > 270000 && tc->dual_link))
> > + return MODE_CLOCK_HIGH;
> > +
> > + return MODE_OK;
> > +}
> > +
> > +static int tc358775_parse_dt(struct device_node *np, struct tc_data *tc)
> > +{
> > + struct device_node *endpoint;
> > + struct device_node *parent;
> > + struct device_node *remote;
> > + struct property *prop;
> > + int len;
> > +
> > + endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
> > + TC358775_DSI_IN, -1);
> > + if (endpoint) {
> > + /* dsi0_out node */
> > + parent = of_graph_get_remote_port_parent(endpoint);
> > + of_node_put(endpoint);
> > + if (parent) {
> > + /* dsi0 port 1 */
> > + endpoint = of_graph_get_endpoint_by_regs(parent, 1, -1);
> > + of_node_put(parent);
> > + prop = of_find_property(endpoint, "data-lanes",
> > + &len);
> > + of_node_put(endpoint);
> > + if (!prop) {
> > + dev_err(tc->dev,
> > + "failed to find data lane\n");
> > + return -EPROBE_DEFER;
> > + }
> > + }
> > + }
> > +
> > + tc->num_dsi_lanes = len / sizeof(u32);
> > +
> > + if (tc->num_dsi_lanes < 1 || tc->num_dsi_lanes > 4)
> > + return -EINVAL;
> > +
> > + tc->host_node = of_graph_get_remote_node(np, 0, 0);
> > + if (!tc->host_node)
> > + return -ENODEV;
> > +
> > + of_node_put(tc->host_node);
> > +
> > + endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
> > + TC358775_LVDS_OUT1, -1);
> > + if (endpoint) {
> > + remote = of_graph_get_remote_port_parent(endpoint);
> > + of_node_put(endpoint);
> > +
> > + if (remote) {
> > + if (of_device_is_available(remote))
> > + tc->dual_link = true;
> > + of_node_put(remote);
> > + }
> > + }
> > +
> > + dev_dbg(tc->dev, "no.of dsi lanes: %d\n", tc->num_dsi_lanes);
> > + dev_dbg(tc->dev, "operating in %s-link mode\n",
> > + tc->dual_link ? "dual" : "single");
> > +
> > + return 0;
> > +}
> > +
> > +static int tc_bridge_attach(struct drm_bridge *bridge,
> > + enum drm_bridge_attach_flags flags)
> > +{
> > + struct tc_data *tc = bridge_to_tc(bridge);
> > + struct device *dev = &tc->i2c->dev;
> > + struct mipi_dsi_host *host;
> > + struct mipi_dsi_device *dsi;
> > + int ret;
> > +
> > + const struct mipi_dsi_device_info info = { .type = "tc358775",
> > + .channel = 0,
> > + .node = NULL,
> > + };
> > +
> > + host = of_find_mipi_dsi_host_by_node(tc->host_node);
> > + if (!host) {
> > + dev_err(dev, "failed to find dsi host\n");
> > + return -EPROBE_DEFER;
> > + }
> > +
> > + dsi = mipi_dsi_device_register_full(host, &info);
> > + if (IS_ERR(dsi)) {
> > + dev_err(dev, "failed to create dsi device\n");
> > + ret = PTR_ERR(dsi);
> > + goto err_dsi_device;
> > + }
> > +
> > + tc->dsi = dsi;
> > +
> > + dsi->lanes = tc->num_dsi_lanes;
> > + dsi->format = MIPI_DSI_FMT_RGB888;
> > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
> > +
> > + ret = mipi_dsi_attach(dsi);
> > + if (ret < 0) {
> > + dev_err(dev, "failed to attach dsi to host\n");
> > + goto err_dsi_attach;
> > + }
> > +
> > + /* Attach the panel-bridge to the dsi bridge */
> > + return drm_bridge_attach(bridge->encoder, tc->panel_bridge,
> > + &tc->bridge, flags);
> > +err_dsi_attach:
> > + mipi_dsi_device_unregister(dsi);
> > +err_dsi_device:
> > + return ret;
> > +}
> > +
> > +static const struct drm_bridge_funcs tc_bridge_funcs = {
> > + .attach = tc_bridge_attach,
> > + .pre_enable = tc_bridge_pre_enable,
> > + .enable = tc_bridge_enable,
> > + .mode_valid = tc_mode_valid,
> > + .post_disable = tc_bridge_post_disable,
> > +};
> > +
> > +static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
> > +{
> > + struct device *dev = &client->dev;
> > + struct drm_panel *panel;
> > + struct tc_data *tc;
> > + int ret;
> > +
> > + tc = devm_kzalloc(dev, sizeof(*tc), GFP_KERNEL);
> > + if (!tc)
> > + return -ENOMEM;
> > +
> > + tc->dev = dev;
> > + tc->i2c = client;
> > +
> > + ret = drm_of_find_panel_or_bridge(dev->of_node, TC358775_LVDS_OUT0,
> > + 0, &panel, NULL);
> > + if (ret < 0)
> > + return ret;
> > + if (!panel)
> > + return -ENODEV;
> > +
> > + tc->panel_bridge = devm_drm_panel_bridge_add(dev, panel);
> > + if (IS_ERR(tc->panel_bridge))
> > + return PTR_ERR(tc->panel_bridge);
> > +
> > + ret = tc358775_parse_dt(dev->of_node, tc);
> > + if (ret)
> > + return ret;
> > +
> > + tc->vddio = devm_regulator_get(dev, "vddio-supply");
> > + if (IS_ERR(tc->vddio)) {
> > + ret = PTR_ERR(tc->vddio);
> > + dev_err(dev, "vddio-supply not found\n");
> > + return ret;
> > + }
> > +
> > + tc->vdd = devm_regulator_get(dev, "vdd-supply");
> > + if (IS_ERR(tc->vdd)) {
> > + ret = PTR_ERR(tc->vddio);
> > + dev_err(dev, "vdd-supply not found\n");
> > + return ret;
> > + }
> > +
> > + tc->stby_gpio = devm_gpiod_get(dev, "stby", GPIOD_OUT_HIGH);
> > + if (IS_ERR(tc->stby_gpio)) {
> > + ret = PTR_ERR(tc->stby_gpio);
> > + dev_err(dev, "cannot get stby-gpio %d\n", ret);
> > + return ret;
> > + }
> > +
> > + tc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
> > + if (IS_ERR(tc->reset_gpio)) {
> > + ret = PTR_ERR(tc->reset_gpio);
> > + dev_err(dev, "cannot get reset-gpios %d\n", ret);
> > + return ret;
> > + }
> > +
> > + tc->bridge.funcs = &tc_bridge_funcs;
> > + tc->bridge.of_node = dev->of_node;
> > + drm_bridge_add(&tc->bridge);
> > +
> > + i2c_set_clientdata(client, tc);
> > +
> > + return 0;
> > +}
> > +
> > +static int tc_remove(struct i2c_client *client)
> > +{
> > + struct tc_data *tc = i2c_get_clientdata(client);
> > +
> > + drm_bridge_remove(&tc->bridge);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct i2c_device_id tc358775_i2c_ids[] = {
> > + { "tc358775", 0 },
> > + { }
> > +};
> > +MODULE_DEVICE_TABLE(i2c, tc358775_i2c_ids);
> > +
> > +static const struct of_device_id tc358775_of_ids[] = {
> > + { .compatible = "toshiba,tc358775", },
> > + { }
> > +};
> > +MODULE_DEVICE_TABLE(of, tc358775_of_ids);
> > +
> > +static struct i2c_driver tc358775_driver = {
> > + .driver = {
> > + .name = "tc358775",
> > + .of_match_table = tc358775_of_ids,
> > + },
> > + .id_table = tc358775_i2c_ids,
> > + .probe = tc_probe,
> > + .remove = tc_remove,
> > +};
> > +module_i2c_driver(tc358775_driver);
> > +
> > +MODULE_AUTHOR("Vinay Simha BN <[email protected]>");
> > +MODULE_DESCRIPTION("TC358775 DSI/LVDS bridge driver");
> > +MODULE_LICENSE("GPL v2");
> >
>
--
regards,
vinaysimha
Hi,
On 21/06/2020 17:38, Vinay Simha BN wrote:
> Signed-off-by: Vinay Simha BN <[email protected]>
>
> ---
> v1:
> Initial version
>
> v2:
> * Andrzej Hajda review comments incorporated
> SPDX identifier
> development debug removed
> alphabetic order headers
> u32 instead of unit32_t
> magic numbers to macros for CLRSI and mux registers
> ignored return value
>
> * Laurent Pinchart review comments incorporated
> mdelay to usleep_range
> bus_formats added
>
> v3:
> * Andrzej Hajda review comments incorporated
> drm_connector_status removed
> u32 rev removed and local variabl is used
> regulator enable disable with proper orders and delays
> as per the spec
> devm_drm_panel_bridge_add method used instead of panel
> description modified
> dual port implemented
>
> v4:
> * Sam Ravnborg review comments incorporated
> panel->connector_type removed
>
> * Reported-by: kernel test robot <[email protected]>
> parse_dt to static function
> removed the if (endpoint), since data-lanes has to be
> present for dsi dts ports
I maybe missed something, but you should also post a YAML DT bindings
file associated to the driver.
Neil
> ---
> drivers/gpu/drm/bridge/Kconfig | 10 +
> drivers/gpu/drm/bridge/Makefile | 1 +
> drivers/gpu/drm/bridge/tc358775.c | 721 ++++++++++++++++++++++++++++++
> 3 files changed, 732 insertions(+)
> create mode 100644 drivers/gpu/drm/bridge/tc358775.c
>
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index 43271c21d3fc..084e9853944a 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -181,6 +181,16 @@ config DRM_TOSHIBA_TC358768
> help
> Toshiba TC358768AXBG/TC358778XBG DSI bridge chip driver.
>
> +config DRM_TOSHIBA_TC358775
> + tristate "Toshiba TC358775 LVDS bridge"
> + depends on OF
> + select DRM_KMS_HELPER
> + select REGMAP_I2C
> + select DRM_PANEL
> + select DRM_MIPI_DSI
> + ---help---
> + Toshiba TC358775 LVDS bridge chip driver.
> +
> config DRM_TI_TFP410
> tristate "TI TFP410 DVI/HDMI bridge"
> depends on OF
> diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
> index d63d4b7e4347..23c770b3bfe4 100644
> --- a/drivers/gpu/drm/bridge/Makefile
> +++ b/drivers/gpu/drm/bridge/Makefile
> @@ -15,6 +15,7 @@ obj-$(CONFIG_DRM_THINE_THC63LVD1024) += thc63lvd1024.o
> obj-$(CONFIG_DRM_TOSHIBA_TC358764) += tc358764.o
> obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
> obj-$(CONFIG_DRM_TOSHIBA_TC358768) += tc358768.o
> +obj-$(CONFIG_DRM_TOSHIBA_TC358775) += tc358775.o
> obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
> obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o
> obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o
> diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
> new file mode 100644
> index 000000000000..8c9bd4e77bfd
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/tc358775.c
> @@ -0,0 +1,721 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * tc358775 DSI to LVDS bridge driver
> + *
> + * Copyright (C) 2020 SMART Wireless Computing
> + * Author: Vinay Simha BN <[email protected]>
> + *
> + */
> +//#define DEBUG
> +#include <linux/clk.h>
> +#include <linux/device.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/slab.h>
> +
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_bridge.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_dp_helper.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_of.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_probe_helper.h>
> +
> +#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
> +#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
> +
> +/* Registers */
> +
> +/* DSI D-PHY Layer Registers */
> +#define D0W_DPHYCONTTX 0x0004 /* Data Lane 0 DPHY Tx Control */
> +#define CLW_DPHYCONTRX 0x0020 /* Clock Lane DPHY Rx Control */
> +#define D0W_DPHYCONTRX 0x0024 /* Data Lane 0 DPHY Rx Control */
> +#define D1W_DPHYCONTRX 0x0028 /* Data Lane 1 DPHY Rx Control */
> +#define D2W_DPHYCONTRX 0x002C /* Data Lane 2 DPHY Rx Control */
> +#define D3W_DPHYCONTRX 0x0030 /* Data Lane 3 DPHY Rx Control */
> +#define COM_DPHYCONTRX 0x0038 /* DPHY Rx Common Control */
> +#define CLW_CNTRL 0x0040 /* Clock Lane Control */
> +#define D0W_CNTRL 0x0044 /* Data Lane 0 Control */
> +#define D1W_CNTRL 0x0048 /* Data Lane 1 Control */
> +#define D2W_CNTRL 0x004C /* Data Lane 2 Control */
> +#define D3W_CNTRL 0x0050 /* Data Lane 3 Control */
> +#define DFTMODE_CNTRL 0x0054 /* DFT Mode Control */
> +
> +/* DSI PPI Layer Registers */
> +#define PPI_STARTPPI 0x0104 /* START control bit of PPI-TX function. */
> +#define PPI_START_FUNCTION 1
> +
> +#define PPI_BUSYPPI 0x0108
> +#define PPI_LINEINITCNT 0x0110 /* Line Initialization Wait Counter */
> +#define PPI_LPTXTIMECNT 0x0114
> +#define PPI_LANEENABLE 0x0134 /* Enables each lane at the PPI layer. */
> +#define PPI_TX_RX_TA 0x013C /* DSI Bus Turn Around timing parameters */
> +
> +/* Analog timer function enable */
> +#define PPI_CLS_ATMR 0x0140 /* Delay for Clock Lane in LPRX */
> +#define PPI_D0S_ATMR 0x0144 /* Delay for Data Lane 0 in LPRX */
> +#define PPI_D1S_ATMR 0x0148 /* Delay for Data Lane 1 in LPRX */
> +#define PPI_D2S_ATMR 0x014C /* Delay for Data Lane 2 in LPRX */
> +#define PPI_D3S_ATMR 0x0150 /* Delay for Data Lane 3 in LPRX */
> +
> +#define PPI_D0S_CLRSIPOCOUNT 0x0164 /* For lane 0 */
> +#define PPI_D1S_CLRSIPOCOUNT 0x0168 /* For lane 1 */
> +#define PPI_D2S_CLRSIPOCOUNT 0x016C /* For lane 2 */
> +#define PPI_D3S_CLRSIPOCOUNT 0x0170 /* For lane 3 */
> +
> +#define CLS_PRE 0x0180 /* Digital Counter inside of PHY IO */
> +#define D0S_PRE 0x0184 /* Digital Counter inside of PHY IO */
> +#define D1S_PRE 0x0188 /* Digital Counter inside of PHY IO */
> +#define D2S_PRE 0x018C /* Digital Counter inside of PHY IO */
> +#define D3S_PRE 0x0190 /* Digital Counter inside of PHY IO */
> +#define CLS_PREP 0x01A0 /* Digital Counter inside of PHY IO */
> +#define D0S_PREP 0x01A4 /* Digital Counter inside of PHY IO */
> +#define D1S_PREP 0x01A8 /* Digital Counter inside of PHY IO */
> +#define D2S_PREP 0x01AC /* Digital Counter inside of PHY IO */
> +#define D3S_PREP 0x01B0 /* Digital Counter inside of PHY IO */
> +#define CLS_ZERO 0x01C0 /* Digital Counter inside of PHY IO */
> +#define D0S_ZERO 0x01C4 /* Digital Counter inside of PHY IO */
> +#define D1S_ZERO 0x01C8 /* Digital Counter inside of PHY IO */
> +#define D2S_ZERO 0x01CC /* Digital Counter inside of PHY IO */
> +#define D3S_ZERO 0x01D0 /* Digital Counter inside of PHY IO */
> +
> +#define PPI_CLRFLG 0x01E0 /* PRE Counters has reached set values */
> +#define PPI_CLRSIPO 0x01E4 /* Clear SIPO values, Slave mode use only. */
> +#define HSTIMEOUT 0x01F0 /* HS Rx Time Out Counter */
> +#define HSTIMEOUTENABLE 0x01F4 /* Enable HS Rx Time Out Counter */
> +#define DSI_STARTDSI 0x0204 /* START control bit of DSI-TX function */
> +#define DSI_RX_START 1
> +
> +#define DSI_BUSYDSI 0x0208
> +#define DSI_LANEENABLE 0x0210 /* Enables each lane at the Protocol layer. */
> +#define DSI_LANESTATUS0 0x0214 /* Displays lane is in HS RX mode. */
> +#define DSI_LANESTATUS1 0x0218 /* Displays lane is in ULPS or STOP state */
> +
> +#define DSI_INTSTATUS 0x0220 /* Interrupt Status */
> +#define DSI_INTMASK 0x0224 /* Interrupt Mask */
> +#define DSI_INTCLR 0x0228 /* Interrupt Clear */
> +#define DSI_LPTXTO 0x0230 /* Low Power Tx Time Out Counter */
> +
> +#define DSIERRCNT 0x0300 /* DSI Error Count */
> +#define APLCTRL 0x0400 /* Application Layer Control */
> +#define RDPKTLN 0x0404 /* Command Read Packet Length */
> +
> +#define VPCTRL 0x0450 /* Video Path Control */
> +#define HTIM1 0x0454 /* Horizontal Timing Control 1 */
> +#define HTIM2 0x0458 /* Horizontal Timing Control 2 */
> +#define VTIM1 0x045C /* Vertical Timing Control 1 */
> +#define VTIM2 0x0460 /* Vertical Timing Control 2 */
> +#define VFUEN 0x0464 /* Video Frame Timing Update Enable */
> +#define VFUEN_EN BIT(0) /* Upload Enable */
> +
> +/* Mux Input Select for LVDS LINK Input */
> +#define LV_MX0003 0x0480 /* Bit 0 to 3 */
> +#define LV_MX0407 0x0484 /* Bit 4 to 7 */
> +#define LV_MX0811 0x0488 /* Bit 8 to 11 */
> +#define LV_MX1215 0x048C /* Bit 12 to 15 */
> +#define LV_MX1619 0x0490 /* Bit 16 to 19 */
> +#define LV_MX2023 0x0494 /* Bit 20 to 23 */
> +#define LV_MX2427 0x0498 /* Bit 24 to 27 */
> +#define LV_MX(b0, b1, b2, b3) (FLD_VAL(b0, 4, 0) | FLD_VAL(b1, 12, 8) | \
> + FLD_VAL(b2, 20, 16) | FLD_VAL(b3, 28, 24))
> +
> +/* Input bit numbers used in mux registers */
> +enum {
> + LVI_R0,
> + LVI_R1,
> + LVI_R2,
> + LVI_R3,
> + LVI_R4,
> + LVI_R5,
> + LVI_R6,
> + LVI_R7,
> + LVI_G0,
> + LVI_G1,
> + LVI_G2,
> + LVI_G3,
> + LVI_G4,
> + LVI_G5,
> + LVI_G6,
> + LVI_G7,
> + LVI_B0,
> + LVI_B1,
> + LVI_B2,
> + LVI_B3,
> + LVI_B4,
> + LVI_B5,
> + LVI_B6,
> + LVI_B7,
> + LVI_HS,
> + LVI_VS,
> + LVI_DE,
> + LVI_L0
> +};
> +
> +#define LVCFG 0x049C /* LVDS Configuration */
> +#define LVPHY0 0x04A0 /* LVDS PHY 0 */
> +#define LV_PHY0_RST(v) FLD_VAL(v, 22, 22) /* PHY reset */
> +#define LV_PHY0_IS(v) FLD_VAL(v, 15, 14)
> +#define LV_PHY0_ND(v) FLD_VAL(v, 4, 0) /* Frequency range select */
> +#define LV_PHY0_PRBS_ON(v) FLD_VAL(v, 20, 16) /* Clock/Data Flag pins */
> +
> +#define LVPHY1 0x04A4 /* LVDS PHY 1 */
> +#define SYSSTAT 0x0500 /* System Status */
> +#define SYSRST 0x0504 /* System Reset */
> +
> +#define SYS_RST_I2CS BIT(0) /* Reset I2C-Slave controller */
> +#define SYS_RST_I2CM BIT(1) /* Reset I2C-Master controller */
> +#define SYS_RST_LCD BIT(2) /* Reset LCD controller */
> +#define SYS_RST_BM BIT(3) /* Reset Bus Management controller */
> +#define SYS_RST_DSIRX BIT(4) /* Reset DSI-RX and App controller */
> +#define SYS_RST_REG BIT(5) /* Reset Register module */
> +
> +/* GPIO Registers */
> +#define GPIOC 0x0520 /* GPIO Control */
> +#define GPIOO 0x0524 /* GPIO Output */
> +#define GPIOI 0x0528 /* GPIO Input */
> +
> +/* I2C Registers */
> +#define I2CTIMCTRL 0x0540 /* I2C IF Timing and Enable Control */
> +#define I2CMADDR 0x0544 /* I2C Master Addressing */
> +#define WDATAQ 0x0548 /* Write Data Queue */
> +#define RDATAQ 0x054C /* Read Data Queue */
> +
> +/* Chip ID and Revision ID Register */
> +#define IDREG 0x0580
> +
> +#define LPX_PERIOD 4
> +#define TTA_GET 0x40000
> +#define TTA_SURE 6
> +
> +#define TC358775XBG_ID 0x00007500
> +
> +/* Debug Registers */
> +#define DEBUG00 0x05A0 /* Debug */
> +#define DEBUG01 0x05A4 /* LVDS Data */
> +
> +#define DSI_CLEN_BIT BIT(0)
> +#define DIVIDE_BY_3 3 /* PCLK=DCLK/3 */
> +#define DIVIDE_BY_6 6 /* PCLK=DCLK/6 */
> +#define LVCFG_LVEN_BIT BIT(0)
> +
> +#define L0EN BIT(1)
> +
> +#define TC358775_VPCTRL_VSDELAY__MASK 0x3FF00000
> +#define TC358775_VPCTRL_VSDELAY__SHIFT 20
> +static inline u32 TC358775_VPCTRL_VSDELAY(uint32_t val)
> +{
> + return ((val) << TC358775_VPCTRL_VSDELAY__SHIFT) &
> + TC358775_VPCTRL_VSDELAY__MASK;
> +}
> +
> +#define TC358775_VPCTRL_OPXLFMT__MASK 0x00000100
> +#define TC358775_VPCTRL_OPXLFMT__SHIFT 8
> +static inline u32 TC358775_VPCTRL_OPXLFMT(uint32_t val)
> +{
> + return ((val) << TC358775_VPCTRL_OPXLFMT__SHIFT) &
> + TC358775_VPCTRL_OPXLFMT__MASK;
> +}
> +
> +#define TC358775_VPCTRL_MSF__MASK 0x00000001
> +#define TC358775_VPCTRL_MSF__SHIFT 0
> +static inline u32 TC358775_VPCTRL_MSF(uint32_t val)
> +{
> + return ((val) << TC358775_VPCTRL_MSF__SHIFT) &
> + TC358775_VPCTRL_MSF__MASK;
> +}
> +
> +#define TC358775_LVCFG_PCLKDIV__MASK 0x000000f0
> +#define TC358775_LVCFG_PCLKDIV__SHIFT 4
> +static inline u32 TC358775_LVCFG_PCLKDIV(uint32_t val)
> +{
> + return ((val) << TC358775_LVCFG_PCLKDIV__SHIFT) &
> + TC358775_LVCFG_PCLKDIV__MASK;
> +}
> +
> +#define TC358775_LVCFG_LVDLINK__MASK 0x00000002
> +#define TC358775_LVCFG_LVDLINK__SHIFT 0
> +static inline u32 TC358775_LVCFG_LVDLINK(uint32_t val)
> +{
> + return ((val) << TC358775_LVCFG_LVDLINK__SHIFT) &
> + TC358775_LVCFG_LVDLINK__MASK;
> +}
> +
> +enum tc358775_ports {
> + TC358775_DSI_IN,
> + TC358775_LVDS_OUT0,
> + TC358775_LVDS_OUT1,
> +};
> +
> +struct tc_data {
> + struct i2c_client *i2c;
> + struct device *dev;
> +
> + struct drm_bridge bridge;
> + struct drm_bridge *panel_bridge;
> +
> + struct device_node *host_node;
> + struct mipi_dsi_device *dsi;
> + u8 num_dsi_lanes;
> +
> + struct regulator *vdd;
> + struct regulator *vddio;
> + struct gpio_desc *reset_gpio;
> + struct gpio_desc *stby_gpio;
> + bool dual_link; /* single-link or dual-link */
> +};
> +
> +static inline struct tc_data *bridge_to_tc(struct drm_bridge *b)
> +{
> + return container_of(b, struct tc_data, bridge);
> +}
> +
> +static void tc_bridge_pre_enable(struct drm_bridge *bridge)
> +{
> + struct tc_data *tc = bridge_to_tc(bridge);
> + struct device *dev = &tc->dsi->dev;
> + int ret;
> +
> + ret = regulator_enable(tc->vddio);
> + if (ret < 0)
> + dev_err(dev, "regulator vddio enable failed, %d\n", ret);
> + usleep_range(10000, 11000);
> +
> + ret = regulator_enable(tc->vdd);
> + if (ret < 0)
> + dev_err(dev, "regulator vdd enable failed, %d\n", ret);
> + usleep_range(10000, 11000);
> +
> + gpiod_set_value(tc->stby_gpio, 0);
> + usleep_range(10000, 11000);
> +
> + gpiod_set_value(tc->reset_gpio, 0);
> + usleep_range(10, 20);
> +}
> +
> +static void tc_bridge_post_disable(struct drm_bridge *bridge)
> +{
> + struct tc_data *tc = bridge_to_tc(bridge);
> + struct device *dev = &tc->dsi->dev;
> + int ret;
> +
> + ret = regulator_disable(tc->vddio);
> + if (ret < 0)
> + dev_err(dev, "regulator vddio disable failed, %d\n", ret);
> + usleep_range(10000, 11000);
> +
> + ret = regulator_disable(tc->vdd);
> + if (ret < 0)
> + dev_err(dev, "regulator vdd disable failed, %d\n", ret);
> + usleep_range(10000, 11000);
> +
> + gpiod_set_value(tc->stby_gpio, 1);
> + usleep_range(10000, 11000);
> +
> + gpiod_set_value(tc->reset_gpio, 1);
> + usleep_range(10, 20);
> +}
> +
> +static u32 d2l_read(struct i2c_client *i2c, u16 reg)
> +{
> + int ret;
> + u8 val[4];
> + u8 addr[] = {(reg >> 8) & 0xff, reg & 0xff};
> + u32 value;
> +
> + ret = i2c_master_send(i2c, addr, sizeof(reg));
> + if (ret < 0)
> + goto fail;
> +
> + ret = i2c_master_recv(i2c, val, sizeof(value));
> + if (ret < 0)
> + goto fail;
> +
> + value = val[3] << 24 | val[2] << 16 | val[1] << 8 | val[0];
> +
> + pr_debug("d2l: I2C : reg:%04x value:%08x\n", reg, value);
> +
> + return value;
> +
> +fail:
> + dev_err(&i2c->dev, "Error %d reading from subaddress 0x%x\n",
> + ret, reg);
> + return 0;
> +}
> +
> +static void d2l_write(struct i2c_client *i2c, u16 reg, u32 val)
> +{
> + u8 buf[6];
> + int ret;
> +
> + buf[0] = reg >> 8;
> + buf[1] = reg & 0xFF;
> + buf[2] = (val >> 0) & 0xFF;
> + buf[3] = (val >> 8) & 0xFF;
> + buf[4] = (val >> 16) & 0xFF;
> + buf[5] = (val >> 24) & 0xFF;
> +
> + ret = i2c_master_send(i2c, buf, ARRAY_SIZE(buf));
> + if (ret < 0)
> + dev_err(&i2c->dev, "Error %d writing to subaddress 0x%x\n",
> + ret, reg);
> +}
> +
> +/* helper function to access bus_formats */
> +static struct drm_connector *get_connector(struct drm_encoder *encoder)
> +{
> + struct drm_device *dev = encoder->dev;
> + struct drm_connector *connector;
> +
> + list_for_each_entry(connector, &dev->mode_config.connector_list, head)
> + if (connector->encoder == encoder)
> + return connector;
> +
> + return NULL;
> +}
> +
> +static void tc_bridge_enable(struct drm_bridge *bridge)
> +{
> + struct tc_data *tc = bridge_to_tc(bridge);
> + u32 hbpr, hpw, htime1, hfpr, hsize, htime2;
> + u32 vbpr, vpw, vtime1, vfpr, vsize, vtime2;
> + u32 val = 0;
> + u16 bus_formats;
> + struct drm_display_mode *mode;
> + struct drm_connector *connector = get_connector(bridge->encoder);
> +
> + mode = &bridge->encoder->crtc->state->adjusted_mode;
> +
> + hbpr = mode->htotal - mode->hsync_end;
> + hpw = mode->hsync_end - mode->hsync_start;
> + vbpr = mode->vtotal - mode->vsync_end;
> + vpw = mode->vsync_end - mode->vsync_start;
> +
> + htime1 = (hbpr << 16) + hpw;
> + vtime1 = (vbpr << 16) + vpw;
> +
> + hfpr = mode->hsync_start - mode->hdisplay;
> + hsize = mode->hdisplay;
> + vfpr = mode->vsync_start - mode->vdisplay;
> + vsize = mode->vdisplay;
> +
> + htime2 = (hfpr << 16) + hsize;
> + vtime2 = (vfpr << 16) + vsize;
> +
> + val = d2l_read(tc->i2c, IDREG);
> +
> + dev_info(tc->dev, "DSI2LVDS Chip ID.%02x Revision ID. %02x **\n",
> + (val >> 8) & 0xFF, val & 0xFF);
> +
> + d2l_write(tc->i2c, SYSRST, SYS_RST_REG | SYS_RST_DSIRX | SYS_RST_BM |
> + SYS_RST_LCD | SYS_RST_I2CM | SYS_RST_I2CS);
> + usleep_range(30000, 40000);
> +
> + d2l_write(tc->i2c, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
> + d2l_write(tc->i2c, PPI_LPTXTIMECNT, LPX_PERIOD);
> + d2l_write(tc->i2c, PPI_D0S_CLRSIPOCOUNT, 3);
> + d2l_write(tc->i2c, PPI_D1S_CLRSIPOCOUNT, 3);
> + d2l_write(tc->i2c, PPI_D2S_CLRSIPOCOUNT, 3);
> + d2l_write(tc->i2c, PPI_D3S_CLRSIPOCOUNT, 3);
> +
> + val = ((L0EN << tc->num_dsi_lanes) - L0EN) | DSI_CLEN_BIT;
> + d2l_write(tc->i2c, PPI_LANEENABLE, val);
> + d2l_write(tc->i2c, DSI_LANEENABLE, val);
> +
> + d2l_write(tc->i2c, PPI_STARTPPI, PPI_START_FUNCTION);
> + d2l_write(tc->i2c, DSI_STARTDSI, DSI_RX_START);
> +
> + val = TC358775_VPCTRL_VSDELAY(21);
> +
> + bus_formats = connector->display_info.bus_formats[0];
> + dev_dbg(tc->dev, "bus_formats : %04x\n", bus_formats);
> +
> + if (bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG ||
> + bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA) {
> + /* RGB888 */
> + val |= TC358775_VPCTRL_OPXLFMT(1);
> + d2l_write(tc->i2c, VPCTRL, val);
> + } else {
> + /* RGB666 */
> + val |= TC358775_VPCTRL_MSF(1);
> + d2l_write(tc->i2c, VPCTRL, val);
> + }
> +
> + d2l_write(tc->i2c, HTIM1, htime1);
> + d2l_write(tc->i2c, VTIM1, vtime1);
> + d2l_write(tc->i2c, HTIM2, htime2);
> + d2l_write(tc->i2c, VTIM2, vtime2);
> +
> + d2l_write(tc->i2c, VFUEN, VFUEN_EN);
> + d2l_write(tc->i2c, SYSRST, SYS_RST_LCD);
> + d2l_write(tc->i2c, LVPHY0, LV_PHY0_PRBS_ON(4) | LV_PHY0_ND(6));
> +
> + /* default jeida-24 */
> + if (bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG) {
> + /* vesa-24 */
> + d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
> + d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_R7, LVI_R5, LVI_G0));
> + d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_G6, LVI_G7));
> + d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
> + d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_B6, LVI_B7, LVI_B1, LVI_B2));
> + d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
> + d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_R6));
> + }
> +
> + if (bus_formats == MEDIA_BUS_FMT_RGB666_1X7X3_SPWG) {
> + /* jeida-18 */
> + d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
> + d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_L0, LVI_R5, LVI_G0));
> + d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_L0, LVI_L0));
> + d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
> + d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_L0, LVI_L0, LVI_B1, LVI_B2));
> + d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
> + d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_L0));
> + }
> +
> + d2l_write(tc->i2c, VFUEN, VFUEN_EN);
> +
> + val = LVCFG_LVEN_BIT;
> + if (tc->dual_link) {
> + val |= TC358775_LVCFG_LVDLINK(1);
> + val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_6);
> + } else {
> + val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_3);
> + }
> +
> + d2l_write(tc->i2c, LVCFG, val);
> +}
> +
> +static int tc_mode_valid(struct drm_bridge *bridge,
> + const struct drm_display_mode *mode)
> +{
> + struct tc_data *tc = bridge_to_tc(bridge);
> +
> + /* Maximum pixel clock speed 135MHz-single-link/270MHz-dual-link */
> + if ((mode->clock > 135000 && tc->dual_link) ||
> + (mode->clock > 270000 && tc->dual_link))
> + return MODE_CLOCK_HIGH;
> +
> + return MODE_OK;
> +}
> +
> +static int tc358775_parse_dt(struct device_node *np, struct tc_data *tc)
> +{
> + struct device_node *endpoint;
> + struct device_node *parent;
> + struct device_node *remote;
> + struct property *prop;
> + int len;
> +
> + endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
> + TC358775_DSI_IN, -1);
> + if (endpoint) {
> + /* dsi0_out node */
> + parent = of_graph_get_remote_port_parent(endpoint);
> + of_node_put(endpoint);
> + if (parent) {
> + /* dsi0 port 1 */
> + endpoint = of_graph_get_endpoint_by_regs(parent, 1, -1);
> + of_node_put(parent);
> + prop = of_find_property(endpoint, "data-lanes",
> + &len);
> + of_node_put(endpoint);
> + if (!prop) {
> + dev_err(tc->dev,
> + "failed to find data lane\n");
> + return -EPROBE_DEFER;
> + }
> + }
> + }
> +
> + tc->num_dsi_lanes = len / sizeof(u32);
> +
> + if (tc->num_dsi_lanes < 1 || tc->num_dsi_lanes > 4)
> + return -EINVAL;
> +
> + tc->host_node = of_graph_get_remote_node(np, 0, 0);
> + if (!tc->host_node)
> + return -ENODEV;
> +
> + of_node_put(tc->host_node);
> +
> + endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
> + TC358775_LVDS_OUT1, -1);
> + if (endpoint) {
> + remote = of_graph_get_remote_port_parent(endpoint);
> + of_node_put(endpoint);
> +
> + if (remote) {
> + if (of_device_is_available(remote))
> + tc->dual_link = true;
> + of_node_put(remote);
> + }
> + }
> +
> + dev_dbg(tc->dev, "no.of dsi lanes: %d\n", tc->num_dsi_lanes);
> + dev_dbg(tc->dev, "operating in %s-link mode\n",
> + tc->dual_link ? "dual" : "single");
> +
> + return 0;
> +}
> +
> +static int tc_bridge_attach(struct drm_bridge *bridge,
> + enum drm_bridge_attach_flags flags)
> +{
> + struct tc_data *tc = bridge_to_tc(bridge);
> + struct device *dev = &tc->i2c->dev;
> + struct mipi_dsi_host *host;
> + struct mipi_dsi_device *dsi;
> + int ret;
> +
> + const struct mipi_dsi_device_info info = { .type = "tc358775",
> + .channel = 0,
> + .node = NULL,
> + };
> +
> + host = of_find_mipi_dsi_host_by_node(tc->host_node);
> + if (!host) {
> + dev_err(dev, "failed to find dsi host\n");
> + return -EPROBE_DEFER;
> + }
> +
> + dsi = mipi_dsi_device_register_full(host, &info);
> + if (IS_ERR(dsi)) {
> + dev_err(dev, "failed to create dsi device\n");
> + ret = PTR_ERR(dsi);
> + goto err_dsi_device;
> + }
> +
> + tc->dsi = dsi;
> +
> + dsi->lanes = tc->num_dsi_lanes;
> + dsi->format = MIPI_DSI_FMT_RGB888;
> + dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
> +
> + ret = mipi_dsi_attach(dsi);
> + if (ret < 0) {
> + dev_err(dev, "failed to attach dsi to host\n");
> + goto err_dsi_attach;
> + }
> +
> + /* Attach the panel-bridge to the dsi bridge */
> + return drm_bridge_attach(bridge->encoder, tc->panel_bridge,
> + &tc->bridge, flags);
> +err_dsi_attach:
> + mipi_dsi_device_unregister(dsi);
> +err_dsi_device:
> + return ret;
> +}
> +
> +static const struct drm_bridge_funcs tc_bridge_funcs = {
> + .attach = tc_bridge_attach,
> + .pre_enable = tc_bridge_pre_enable,
> + .enable = tc_bridge_enable,
> + .mode_valid = tc_mode_valid,
> + .post_disable = tc_bridge_post_disable,
> +};
> +
> +static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
> +{
> + struct device *dev = &client->dev;
> + struct drm_panel *panel;
> + struct tc_data *tc;
> + int ret;
> +
> + tc = devm_kzalloc(dev, sizeof(*tc), GFP_KERNEL);
> + if (!tc)
> + return -ENOMEM;
> +
> + tc->dev = dev;
> + tc->i2c = client;
> +
> + ret = drm_of_find_panel_or_bridge(dev->of_node, TC358775_LVDS_OUT0,
> + 0, &panel, NULL);
> + if (ret < 0)
> + return ret;
> + if (!panel)
> + return -ENODEV;
> +
> + tc->panel_bridge = devm_drm_panel_bridge_add(dev, panel);
> + if (IS_ERR(tc->panel_bridge))
> + return PTR_ERR(tc->panel_bridge);
> +
> + ret = tc358775_parse_dt(dev->of_node, tc);
> + if (ret)
> + return ret;
> +
> + tc->vddio = devm_regulator_get(dev, "vddio-supply");
> + if (IS_ERR(tc->vddio)) {
> + ret = PTR_ERR(tc->vddio);
> + dev_err(dev, "vddio-supply not found\n");
> + return ret;
> + }
> +
> + tc->vdd = devm_regulator_get(dev, "vdd-supply");
> + if (IS_ERR(tc->vdd)) {
> + ret = PTR_ERR(tc->vddio);
> + dev_err(dev, "vdd-supply not found\n");
> + return ret;
> + }
> +
> + tc->stby_gpio = devm_gpiod_get(dev, "stby", GPIOD_OUT_HIGH);
> + if (IS_ERR(tc->stby_gpio)) {
> + ret = PTR_ERR(tc->stby_gpio);
> + dev_err(dev, "cannot get stby-gpio %d\n", ret);
> + return ret;
> + }
> +
> + tc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
> + if (IS_ERR(tc->reset_gpio)) {
> + ret = PTR_ERR(tc->reset_gpio);
> + dev_err(dev, "cannot get reset-gpios %d\n", ret);
> + return ret;
> + }
> +
> + tc->bridge.funcs = &tc_bridge_funcs;
> + tc->bridge.of_node = dev->of_node;
> + drm_bridge_add(&tc->bridge);
> +
> + i2c_set_clientdata(client, tc);
> +
> + return 0;
> +}
> +
> +static int tc_remove(struct i2c_client *client)
> +{
> + struct tc_data *tc = i2c_get_clientdata(client);
> +
> + drm_bridge_remove(&tc->bridge);
> +
> + return 0;
> +}
> +
> +static const struct i2c_device_id tc358775_i2c_ids[] = {
> + { "tc358775", 0 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, tc358775_i2c_ids);
> +
> +static const struct of_device_id tc358775_of_ids[] = {
> + { .compatible = "toshiba,tc358775", },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, tc358775_of_ids);
> +
> +static struct i2c_driver tc358775_driver = {
> + .driver = {
> + .name = "tc358775",
> + .of_match_table = tc358775_of_ids,
> + },
> + .id_table = tc358775_i2c_ids,
> + .probe = tc_probe,
> + .remove = tc_remove,
> +};
> +module_i2c_driver(tc358775_driver);
> +
> +MODULE_AUTHOR("Vinay Simha BN <[email protected]>");
> +MODULE_DESCRIPTION("TC358775 DSI/LVDS bridge driver");
> +MODULE_LICENSE("GPL v2");
>
Hi,
On 29/06/2020 10:47, Vinay Simha B N wrote:
> Neil,
>
> yaml is the v3 version, there was no change , so i had not created v4 for yaml
> [PATCH v3 2/2] display/drm/bridge: TC358775 DSI/LVDS driver
>
OK, please resend the whole patchset even with unchanged patches, you can explain
which patches were not changed on the cover letter.
Neil
>
> On Mon, Jun 29, 2020 at 2:08 PM Neil Armstrong <[email protected]> wrote:
>>
>> Hi,
>>
>> On 21/06/2020 17:38, Vinay Simha BN wrote:
>>> Signed-off-by: Vinay Simha BN <[email protected]>
>>>
>>> ---
>>> v1:
>>> Initial version
>>>
>>> v2:
>>> * Andrzej Hajda review comments incorporated
>>> SPDX identifier
>>> development debug removed
>>> alphabetic order headers
>>> u32 instead of unit32_t
>>> magic numbers to macros for CLRSI and mux registers
>>> ignored return value
>>>
>>> * Laurent Pinchart review comments incorporated
>>> mdelay to usleep_range
>>> bus_formats added
>>>
>>> v3:
>>> * Andrzej Hajda review comments incorporated
>>> drm_connector_status removed
>>> u32 rev removed and local variabl is used
>>> regulator enable disable with proper orders and delays
>>> as per the spec
>>> devm_drm_panel_bridge_add method used instead of panel
>>> description modified
>>> dual port implemented
>>>
>>> v4:
>>> * Sam Ravnborg review comments incorporated
>>> panel->connector_type removed
>>>
>>> * Reported-by: kernel test robot <[email protected]>
>>> parse_dt to static function
>>> removed the if (endpoint), since data-lanes has to be
>>> present for dsi dts ports
>>
>> I maybe missed something, but you should also post a YAML DT bindings
>> file associated to the driver.
>>
>> Neil
>>
>>
>>> ---
>>> drivers/gpu/drm/bridge/Kconfig | 10 +
>>> drivers/gpu/drm/bridge/Makefile | 1 +
>>> drivers/gpu/drm/bridge/tc358775.c | 721 ++++++++++++++++++++++++++++++
>>> 3 files changed, 732 insertions(+)
>>> create mode 100644 drivers/gpu/drm/bridge/tc358775.c
>>>
>>> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
>>> index 43271c21d3fc..084e9853944a 100644
>>> --- a/drivers/gpu/drm/bridge/Kconfig
>>> +++ b/drivers/gpu/drm/bridge/Kconfig
>>> @@ -181,6 +181,16 @@ config DRM_TOSHIBA_TC358768
>>> help
>>> Toshiba TC358768AXBG/TC358778XBG DSI bridge chip driver.
>>>
>>> +config DRM_TOSHIBA_TC358775
>>> + tristate "Toshiba TC358775 LVDS bridge"
>>> + depends on OF
>>> + select DRM_KMS_HELPER
>>> + select REGMAP_I2C
>>> + select DRM_PANEL
>>> + select DRM_MIPI_DSI
>>> + ---help---
>>> + Toshiba TC358775 LVDS bridge chip driver.
>>> +
>>> config DRM_TI_TFP410
>>> tristate "TI TFP410 DVI/HDMI bridge"
>>> depends on OF
>>> diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
>>> index d63d4b7e4347..23c770b3bfe4 100644
>>> --- a/drivers/gpu/drm/bridge/Makefile
>>> +++ b/drivers/gpu/drm/bridge/Makefile
>>> @@ -15,6 +15,7 @@ obj-$(CONFIG_DRM_THINE_THC63LVD1024) += thc63lvd1024.o
>>> obj-$(CONFIG_DRM_TOSHIBA_TC358764) += tc358764.o
>>> obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
>>> obj-$(CONFIG_DRM_TOSHIBA_TC358768) += tc358768.o
>>> +obj-$(CONFIG_DRM_TOSHIBA_TC358775) += tc358775.o
>>> obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
>>> obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o
>>> obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o
>>> diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
>>> new file mode 100644
>>> index 000000000000..8c9bd4e77bfd
>>> --- /dev/null
>>> +++ b/drivers/gpu/drm/bridge/tc358775.c
>>> @@ -0,0 +1,721 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +/*
>>> + * tc358775 DSI to LVDS bridge driver
>>> + *
>>> + * Copyright (C) 2020 SMART Wireless Computing
>>> + * Author: Vinay Simha BN <[email protected]>
>>> + *
>>> + */
>>> +//#define DEBUG
>>> +#include <linux/clk.h>
>>> +#include <linux/device.h>
>>> +#include <linux/gpio/consumer.h>
>>> +#include <linux/i2c.h>
>>> +#include <linux/kernel.h>
>>> +#include <linux/module.h>
>>> +#include <linux/regulator/consumer.h>
>>> +#include <linux/slab.h>
>>> +
>>> +#include <drm/drm_atomic_helper.h>
>>> +#include <drm/drm_bridge.h>
>>> +#include <drm/drm_crtc_helper.h>
>>> +#include <drm/drm_dp_helper.h>
>>> +#include <drm/drm_mipi_dsi.h>
>>> +#include <drm/drm_of.h>
>>> +#include <drm/drm_panel.h>
>>> +#include <drm/drm_probe_helper.h>
>>> +
>>> +#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
>>> +#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
>>> +
>>> +/* Registers */
>>> +
>>> +/* DSI D-PHY Layer Registers */
>>> +#define D0W_DPHYCONTTX 0x0004 /* Data Lane 0 DPHY Tx Control */
>>> +#define CLW_DPHYCONTRX 0x0020 /* Clock Lane DPHY Rx Control */
>>> +#define D0W_DPHYCONTRX 0x0024 /* Data Lane 0 DPHY Rx Control */
>>> +#define D1W_DPHYCONTRX 0x0028 /* Data Lane 1 DPHY Rx Control */
>>> +#define D2W_DPHYCONTRX 0x002C /* Data Lane 2 DPHY Rx Control */
>>> +#define D3W_DPHYCONTRX 0x0030 /* Data Lane 3 DPHY Rx Control */
>>> +#define COM_DPHYCONTRX 0x0038 /* DPHY Rx Common Control */
>>> +#define CLW_CNTRL 0x0040 /* Clock Lane Control */
>>> +#define D0W_CNTRL 0x0044 /* Data Lane 0 Control */
>>> +#define D1W_CNTRL 0x0048 /* Data Lane 1 Control */
>>> +#define D2W_CNTRL 0x004C /* Data Lane 2 Control */
>>> +#define D3W_CNTRL 0x0050 /* Data Lane 3 Control */
>>> +#define DFTMODE_CNTRL 0x0054 /* DFT Mode Control */
>>> +
>>> +/* DSI PPI Layer Registers */
>>> +#define PPI_STARTPPI 0x0104 /* START control bit of PPI-TX function. */
>>> +#define PPI_START_FUNCTION 1
>>> +
>>> +#define PPI_BUSYPPI 0x0108
>>> +#define PPI_LINEINITCNT 0x0110 /* Line Initialization Wait Counter */
>>> +#define PPI_LPTXTIMECNT 0x0114
>>> +#define PPI_LANEENABLE 0x0134 /* Enables each lane at the PPI layer. */
>>> +#define PPI_TX_RX_TA 0x013C /* DSI Bus Turn Around timing parameters */
>>> +
>>> +/* Analog timer function enable */
>>> +#define PPI_CLS_ATMR 0x0140 /* Delay for Clock Lane in LPRX */
>>> +#define PPI_D0S_ATMR 0x0144 /* Delay for Data Lane 0 in LPRX */
>>> +#define PPI_D1S_ATMR 0x0148 /* Delay for Data Lane 1 in LPRX */
>>> +#define PPI_D2S_ATMR 0x014C /* Delay for Data Lane 2 in LPRX */
>>> +#define PPI_D3S_ATMR 0x0150 /* Delay for Data Lane 3 in LPRX */
>>> +
>>> +#define PPI_D0S_CLRSIPOCOUNT 0x0164 /* For lane 0 */
>>> +#define PPI_D1S_CLRSIPOCOUNT 0x0168 /* For lane 1 */
>>> +#define PPI_D2S_CLRSIPOCOUNT 0x016C /* For lane 2 */
>>> +#define PPI_D3S_CLRSIPOCOUNT 0x0170 /* For lane 3 */
>>> +
>>> +#define CLS_PRE 0x0180 /* Digital Counter inside of PHY IO */
>>> +#define D0S_PRE 0x0184 /* Digital Counter inside of PHY IO */
>>> +#define D1S_PRE 0x0188 /* Digital Counter inside of PHY IO */
>>> +#define D2S_PRE 0x018C /* Digital Counter inside of PHY IO */
>>> +#define D3S_PRE 0x0190 /* Digital Counter inside of PHY IO */
>>> +#define CLS_PREP 0x01A0 /* Digital Counter inside of PHY IO */
>>> +#define D0S_PREP 0x01A4 /* Digital Counter inside of PHY IO */
>>> +#define D1S_PREP 0x01A8 /* Digital Counter inside of PHY IO */
>>> +#define D2S_PREP 0x01AC /* Digital Counter inside of PHY IO */
>>> +#define D3S_PREP 0x01B0 /* Digital Counter inside of PHY IO */
>>> +#define CLS_ZERO 0x01C0 /* Digital Counter inside of PHY IO */
>>> +#define D0S_ZERO 0x01C4 /* Digital Counter inside of PHY IO */
>>> +#define D1S_ZERO 0x01C8 /* Digital Counter inside of PHY IO */
>>> +#define D2S_ZERO 0x01CC /* Digital Counter inside of PHY IO */
>>> +#define D3S_ZERO 0x01D0 /* Digital Counter inside of PHY IO */
>>> +
>>> +#define PPI_CLRFLG 0x01E0 /* PRE Counters has reached set values */
>>> +#define PPI_CLRSIPO 0x01E4 /* Clear SIPO values, Slave mode use only. */
>>> +#define HSTIMEOUT 0x01F0 /* HS Rx Time Out Counter */
>>> +#define HSTIMEOUTENABLE 0x01F4 /* Enable HS Rx Time Out Counter */
>>> +#define DSI_STARTDSI 0x0204 /* START control bit of DSI-TX function */
>>> +#define DSI_RX_START 1
>>> +
>>> +#define DSI_BUSYDSI 0x0208
>>> +#define DSI_LANEENABLE 0x0210 /* Enables each lane at the Protocol layer. */
>>> +#define DSI_LANESTATUS0 0x0214 /* Displays lane is in HS RX mode. */
>>> +#define DSI_LANESTATUS1 0x0218 /* Displays lane is in ULPS or STOP state */
>>> +
>>> +#define DSI_INTSTATUS 0x0220 /* Interrupt Status */
>>> +#define DSI_INTMASK 0x0224 /* Interrupt Mask */
>>> +#define DSI_INTCLR 0x0228 /* Interrupt Clear */
>>> +#define DSI_LPTXTO 0x0230 /* Low Power Tx Time Out Counter */
>>> +
>>> +#define DSIERRCNT 0x0300 /* DSI Error Count */
>>> +#define APLCTRL 0x0400 /* Application Layer Control */
>>> +#define RDPKTLN 0x0404 /* Command Read Packet Length */
>>> +
>>> +#define VPCTRL 0x0450 /* Video Path Control */
>>> +#define HTIM1 0x0454 /* Horizontal Timing Control 1 */
>>> +#define HTIM2 0x0458 /* Horizontal Timing Control 2 */
>>> +#define VTIM1 0x045C /* Vertical Timing Control 1 */
>>> +#define VTIM2 0x0460 /* Vertical Timing Control 2 */
>>> +#define VFUEN 0x0464 /* Video Frame Timing Update Enable */
>>> +#define VFUEN_EN BIT(0) /* Upload Enable */
>>> +
>>> +/* Mux Input Select for LVDS LINK Input */
>>> +#define LV_MX0003 0x0480 /* Bit 0 to 3 */
>>> +#define LV_MX0407 0x0484 /* Bit 4 to 7 */
>>> +#define LV_MX0811 0x0488 /* Bit 8 to 11 */
>>> +#define LV_MX1215 0x048C /* Bit 12 to 15 */
>>> +#define LV_MX1619 0x0490 /* Bit 16 to 19 */
>>> +#define LV_MX2023 0x0494 /* Bit 20 to 23 */
>>> +#define LV_MX2427 0x0498 /* Bit 24 to 27 */
>>> +#define LV_MX(b0, b1, b2, b3) (FLD_VAL(b0, 4, 0) | FLD_VAL(b1, 12, 8) | \
>>> + FLD_VAL(b2, 20, 16) | FLD_VAL(b3, 28, 24))
>>> +
>>> +/* Input bit numbers used in mux registers */
>>> +enum {
>>> + LVI_R0,
>>> + LVI_R1,
>>> + LVI_R2,
>>> + LVI_R3,
>>> + LVI_R4,
>>> + LVI_R5,
>>> + LVI_R6,
>>> + LVI_R7,
>>> + LVI_G0,
>>> + LVI_G1,
>>> + LVI_G2,
>>> + LVI_G3,
>>> + LVI_G4,
>>> + LVI_G5,
>>> + LVI_G6,
>>> + LVI_G7,
>>> + LVI_B0,
>>> + LVI_B1,
>>> + LVI_B2,
>>> + LVI_B3,
>>> + LVI_B4,
>>> + LVI_B5,
>>> + LVI_B6,
>>> + LVI_B7,
>>> + LVI_HS,
>>> + LVI_VS,
>>> + LVI_DE,
>>> + LVI_L0
>>> +};
>>> +
>>> +#define LVCFG 0x049C /* LVDS Configuration */
>>> +#define LVPHY0 0x04A0 /* LVDS PHY 0 */
>>> +#define LV_PHY0_RST(v) FLD_VAL(v, 22, 22) /* PHY reset */
>>> +#define LV_PHY0_IS(v) FLD_VAL(v, 15, 14)
>>> +#define LV_PHY0_ND(v) FLD_VAL(v, 4, 0) /* Frequency range select */
>>> +#define LV_PHY0_PRBS_ON(v) FLD_VAL(v, 20, 16) /* Clock/Data Flag pins */
>>> +
>>> +#define LVPHY1 0x04A4 /* LVDS PHY 1 */
>>> +#define SYSSTAT 0x0500 /* System Status */
>>> +#define SYSRST 0x0504 /* System Reset */
>>> +
>>> +#define SYS_RST_I2CS BIT(0) /* Reset I2C-Slave controller */
>>> +#define SYS_RST_I2CM BIT(1) /* Reset I2C-Master controller */
>>> +#define SYS_RST_LCD BIT(2) /* Reset LCD controller */
>>> +#define SYS_RST_BM BIT(3) /* Reset Bus Management controller */
>>> +#define SYS_RST_DSIRX BIT(4) /* Reset DSI-RX and App controller */
>>> +#define SYS_RST_REG BIT(5) /* Reset Register module */
>>> +
>>> +/* GPIO Registers */
>>> +#define GPIOC 0x0520 /* GPIO Control */
>>> +#define GPIOO 0x0524 /* GPIO Output */
>>> +#define GPIOI 0x0528 /* GPIO Input */
>>> +
>>> +/* I2C Registers */
>>> +#define I2CTIMCTRL 0x0540 /* I2C IF Timing and Enable Control */
>>> +#define I2CMADDR 0x0544 /* I2C Master Addressing */
>>> +#define WDATAQ 0x0548 /* Write Data Queue */
>>> +#define RDATAQ 0x054C /* Read Data Queue */
>>> +
>>> +/* Chip ID and Revision ID Register */
>>> +#define IDREG 0x0580
>>> +
>>> +#define LPX_PERIOD 4
>>> +#define TTA_GET 0x40000
>>> +#define TTA_SURE 6
>>> +
>>> +#define TC358775XBG_ID 0x00007500
>>> +
>>> +/* Debug Registers */
>>> +#define DEBUG00 0x05A0 /* Debug */
>>> +#define DEBUG01 0x05A4 /* LVDS Data */
>>> +
>>> +#define DSI_CLEN_BIT BIT(0)
>>> +#define DIVIDE_BY_3 3 /* PCLK=DCLK/3 */
>>> +#define DIVIDE_BY_6 6 /* PCLK=DCLK/6 */
>>> +#define LVCFG_LVEN_BIT BIT(0)
>>> +
>>> +#define L0EN BIT(1)
>>> +
>>> +#define TC358775_VPCTRL_VSDELAY__MASK 0x3FF00000
>>> +#define TC358775_VPCTRL_VSDELAY__SHIFT 20
>>> +static inline u32 TC358775_VPCTRL_VSDELAY(uint32_t val)
>>> +{
>>> + return ((val) << TC358775_VPCTRL_VSDELAY__SHIFT) &
>>> + TC358775_VPCTRL_VSDELAY__MASK;
>>> +}
>>> +
>>> +#define TC358775_VPCTRL_OPXLFMT__MASK 0x00000100
>>> +#define TC358775_VPCTRL_OPXLFMT__SHIFT 8
>>> +static inline u32 TC358775_VPCTRL_OPXLFMT(uint32_t val)
>>> +{
>>> + return ((val) << TC358775_VPCTRL_OPXLFMT__SHIFT) &
>>> + TC358775_VPCTRL_OPXLFMT__MASK;
>>> +}
>>> +
>>> +#define TC358775_VPCTRL_MSF__MASK 0x00000001
>>> +#define TC358775_VPCTRL_MSF__SHIFT 0
>>> +static inline u32 TC358775_VPCTRL_MSF(uint32_t val)
>>> +{
>>> + return ((val) << TC358775_VPCTRL_MSF__SHIFT) &
>>> + TC358775_VPCTRL_MSF__MASK;
>>> +}
>>> +
>>> +#define TC358775_LVCFG_PCLKDIV__MASK 0x000000f0
>>> +#define TC358775_LVCFG_PCLKDIV__SHIFT 4
>>> +static inline u32 TC358775_LVCFG_PCLKDIV(uint32_t val)
>>> +{
>>> + return ((val) << TC358775_LVCFG_PCLKDIV__SHIFT) &
>>> + TC358775_LVCFG_PCLKDIV__MASK;
>>> +}
>>> +
>>> +#define TC358775_LVCFG_LVDLINK__MASK 0x00000002
>>> +#define TC358775_LVCFG_LVDLINK__SHIFT 0
>>> +static inline u32 TC358775_LVCFG_LVDLINK(uint32_t val)
>>> +{
>>> + return ((val) << TC358775_LVCFG_LVDLINK__SHIFT) &
>>> + TC358775_LVCFG_LVDLINK__MASK;
>>> +}
>>> +
>>> +enum tc358775_ports {
>>> + TC358775_DSI_IN,
>>> + TC358775_LVDS_OUT0,
>>> + TC358775_LVDS_OUT1,
>>> +};
>>> +
>>> +struct tc_data {
>>> + struct i2c_client *i2c;
>>> + struct device *dev;
>>> +
>>> + struct drm_bridge bridge;
>>> + struct drm_bridge *panel_bridge;
>>> +
>>> + struct device_node *host_node;
>>> + struct mipi_dsi_device *dsi;
>>> + u8 num_dsi_lanes;
>>> +
>>> + struct regulator *vdd;
>>> + struct regulator *vddio;
>>> + struct gpio_desc *reset_gpio;
>>> + struct gpio_desc *stby_gpio;
>>> + bool dual_link; /* single-link or dual-link */
>>> +};
>>> +
>>> +static inline struct tc_data *bridge_to_tc(struct drm_bridge *b)
>>> +{
>>> + return container_of(b, struct tc_data, bridge);
>>> +}
>>> +
>>> +static void tc_bridge_pre_enable(struct drm_bridge *bridge)
>>> +{
>>> + struct tc_data *tc = bridge_to_tc(bridge);
>>> + struct device *dev = &tc->dsi->dev;
>>> + int ret;
>>> +
>>> + ret = regulator_enable(tc->vddio);
>>> + if (ret < 0)
>>> + dev_err(dev, "regulator vddio enable failed, %d\n", ret);
>>> + usleep_range(10000, 11000);
>>> +
>>> + ret = regulator_enable(tc->vdd);
>>> + if (ret < 0)
>>> + dev_err(dev, "regulator vdd enable failed, %d\n", ret);
>>> + usleep_range(10000, 11000);
>>> +
>>> + gpiod_set_value(tc->stby_gpio, 0);
>>> + usleep_range(10000, 11000);
>>> +
>>> + gpiod_set_value(tc->reset_gpio, 0);
>>> + usleep_range(10, 20);
>>> +}
>>> +
>>> +static void tc_bridge_post_disable(struct drm_bridge *bridge)
>>> +{
>>> + struct tc_data *tc = bridge_to_tc(bridge);
>>> + struct device *dev = &tc->dsi->dev;
>>> + int ret;
>>> +
>>> + ret = regulator_disable(tc->vddio);
>>> + if (ret < 0)
>>> + dev_err(dev, "regulator vddio disable failed, %d\n", ret);
>>> + usleep_range(10000, 11000);
>>> +
>>> + ret = regulator_disable(tc->vdd);
>>> + if (ret < 0)
>>> + dev_err(dev, "regulator vdd disable failed, %d\n", ret);
>>> + usleep_range(10000, 11000);
>>> +
>>> + gpiod_set_value(tc->stby_gpio, 1);
>>> + usleep_range(10000, 11000);
>>> +
>>> + gpiod_set_value(tc->reset_gpio, 1);
>>> + usleep_range(10, 20);
>>> +}
>>> +
>>> +static u32 d2l_read(struct i2c_client *i2c, u16 reg)
>>> +{
>>> + int ret;
>>> + u8 val[4];
>>> + u8 addr[] = {(reg >> 8) & 0xff, reg & 0xff};
>>> + u32 value;
>>> +
>>> + ret = i2c_master_send(i2c, addr, sizeof(reg));
>>> + if (ret < 0)
>>> + goto fail;
>>> +
>>> + ret = i2c_master_recv(i2c, val, sizeof(value));
>>> + if (ret < 0)
>>> + goto fail;
>>> +
>>> + value = val[3] << 24 | val[2] << 16 | val[1] << 8 | val[0];
>>> +
>>> + pr_debug("d2l: I2C : reg:%04x value:%08x\n", reg, value);
>>> +
>>> + return value;
>>> +
>>> +fail:
>>> + dev_err(&i2c->dev, "Error %d reading from subaddress 0x%x\n",
>>> + ret, reg);
>>> + return 0;
>>> +}
>>> +
>>> +static void d2l_write(struct i2c_client *i2c, u16 reg, u32 val)
>>> +{
>>> + u8 buf[6];
>>> + int ret;
>>> +
>>> + buf[0] = reg >> 8;
>>> + buf[1] = reg & 0xFF;
>>> + buf[2] = (val >> 0) & 0xFF;
>>> + buf[3] = (val >> 8) & 0xFF;
>>> + buf[4] = (val >> 16) & 0xFF;
>>> + buf[5] = (val >> 24) & 0xFF;
>>> +
>>> + ret = i2c_master_send(i2c, buf, ARRAY_SIZE(buf));
>>> + if (ret < 0)
>>> + dev_err(&i2c->dev, "Error %d writing to subaddress 0x%x\n",
>>> + ret, reg);
>>> +}
>>> +
>>> +/* helper function to access bus_formats */
>>> +static struct drm_connector *get_connector(struct drm_encoder *encoder)
>>> +{
>>> + struct drm_device *dev = encoder->dev;
>>> + struct drm_connector *connector;
>>> +
>>> + list_for_each_entry(connector, &dev->mode_config.connector_list, head)
>>> + if (connector->encoder == encoder)
>>> + return connector;
>>> +
>>> + return NULL;
>>> +}
>>> +
>>> +static void tc_bridge_enable(struct drm_bridge *bridge)
>>> +{
>>> + struct tc_data *tc = bridge_to_tc(bridge);
>>> + u32 hbpr, hpw, htime1, hfpr, hsize, htime2;
>>> + u32 vbpr, vpw, vtime1, vfpr, vsize, vtime2;
>>> + u32 val = 0;
>>> + u16 bus_formats;
>>> + struct drm_display_mode *mode;
>>> + struct drm_connector *connector = get_connector(bridge->encoder);
>>> +
>>> + mode = &bridge->encoder->crtc->state->adjusted_mode;
>>> +
>>> + hbpr = mode->htotal - mode->hsync_end;
>>> + hpw = mode->hsync_end - mode->hsync_start;
>>> + vbpr = mode->vtotal - mode->vsync_end;
>>> + vpw = mode->vsync_end - mode->vsync_start;
>>> +
>>> + htime1 = (hbpr << 16) + hpw;
>>> + vtime1 = (vbpr << 16) + vpw;
>>> +
>>> + hfpr = mode->hsync_start - mode->hdisplay;
>>> + hsize = mode->hdisplay;
>>> + vfpr = mode->vsync_start - mode->vdisplay;
>>> + vsize = mode->vdisplay;
>>> +
>>> + htime2 = (hfpr << 16) + hsize;
>>> + vtime2 = (vfpr << 16) + vsize;
>>> +
>>> + val = d2l_read(tc->i2c, IDREG);
>>> +
>>> + dev_info(tc->dev, "DSI2LVDS Chip ID.%02x Revision ID. %02x **\n",
>>> + (val >> 8) & 0xFF, val & 0xFF);
>>> +
>>> + d2l_write(tc->i2c, SYSRST, SYS_RST_REG | SYS_RST_DSIRX | SYS_RST_BM |
>>> + SYS_RST_LCD | SYS_RST_I2CM | SYS_RST_I2CS);
>>> + usleep_range(30000, 40000);
>>> +
>>> + d2l_write(tc->i2c, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
>>> + d2l_write(tc->i2c, PPI_LPTXTIMECNT, LPX_PERIOD);
>>> + d2l_write(tc->i2c, PPI_D0S_CLRSIPOCOUNT, 3);
>>> + d2l_write(tc->i2c, PPI_D1S_CLRSIPOCOUNT, 3);
>>> + d2l_write(tc->i2c, PPI_D2S_CLRSIPOCOUNT, 3);
>>> + d2l_write(tc->i2c, PPI_D3S_CLRSIPOCOUNT, 3);
>>> +
>>> + val = ((L0EN << tc->num_dsi_lanes) - L0EN) | DSI_CLEN_BIT;
>>> + d2l_write(tc->i2c, PPI_LANEENABLE, val);
>>> + d2l_write(tc->i2c, DSI_LANEENABLE, val);
>>> +
>>> + d2l_write(tc->i2c, PPI_STARTPPI, PPI_START_FUNCTION);
>>> + d2l_write(tc->i2c, DSI_STARTDSI, DSI_RX_START);
>>> +
>>> + val = TC358775_VPCTRL_VSDELAY(21);
>>> +
>>> + bus_formats = connector->display_info.bus_formats[0];
>>> + dev_dbg(tc->dev, "bus_formats : %04x\n", bus_formats);
>>> +
>>> + if (bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG ||
>>> + bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA) {
>>> + /* RGB888 */
>>> + val |= TC358775_VPCTRL_OPXLFMT(1);
>>> + d2l_write(tc->i2c, VPCTRL, val);
>>> + } else {
>>> + /* RGB666 */
>>> + val |= TC358775_VPCTRL_MSF(1);
>>> + d2l_write(tc->i2c, VPCTRL, val);
>>> + }
>>> +
>>> + d2l_write(tc->i2c, HTIM1, htime1);
>>> + d2l_write(tc->i2c, VTIM1, vtime1);
>>> + d2l_write(tc->i2c, HTIM2, htime2);
>>> + d2l_write(tc->i2c, VTIM2, vtime2);
>>> +
>>> + d2l_write(tc->i2c, VFUEN, VFUEN_EN);
>>> + d2l_write(tc->i2c, SYSRST, SYS_RST_LCD);
>>> + d2l_write(tc->i2c, LVPHY0, LV_PHY0_PRBS_ON(4) | LV_PHY0_ND(6));
>>> +
>>> + /* default jeida-24 */
>>> + if (bus_formats == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG) {
>>> + /* vesa-24 */
>>> + d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
>>> + d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_R7, LVI_R5, LVI_G0));
>>> + d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_G6, LVI_G7));
>>> + d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
>>> + d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_B6, LVI_B7, LVI_B1, LVI_B2));
>>> + d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
>>> + d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_R6));
>>> + }
>>> +
>>> + if (bus_formats == MEDIA_BUS_FMT_RGB666_1X7X3_SPWG) {
>>> + /* jeida-18 */
>>> + d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
>>> + d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_L0, LVI_R5, LVI_G0));
>>> + d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_L0, LVI_L0));
>>> + d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
>>> + d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_L0, LVI_L0, LVI_B1, LVI_B2));
>>> + d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
>>> + d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_L0));
>>> + }
>>> +
>>> + d2l_write(tc->i2c, VFUEN, VFUEN_EN);
>>> +
>>> + val = LVCFG_LVEN_BIT;
>>> + if (tc->dual_link) {
>>> + val |= TC358775_LVCFG_LVDLINK(1);
>>> + val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_6);
>>> + } else {
>>> + val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_3);
>>> + }
>>> +
>>> + d2l_write(tc->i2c, LVCFG, val);
>>> +}
>>> +
>>> +static int tc_mode_valid(struct drm_bridge *bridge,
>>> + const struct drm_display_mode *mode)
>>> +{
>>> + struct tc_data *tc = bridge_to_tc(bridge);
>>> +
>>> + /* Maximum pixel clock speed 135MHz-single-link/270MHz-dual-link */
>>> + if ((mode->clock > 135000 && tc->dual_link) ||
>>> + (mode->clock > 270000 && tc->dual_link))
>>> + return MODE_CLOCK_HIGH;
>>> +
>>> + return MODE_OK;
>>> +}
>>> +
>>> +static int tc358775_parse_dt(struct device_node *np, struct tc_data *tc)
>>> +{
>>> + struct device_node *endpoint;
>>> + struct device_node *parent;
>>> + struct device_node *remote;
>>> + struct property *prop;
>>> + int len;
>>> +
>>> + endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
>>> + TC358775_DSI_IN, -1);
>>> + if (endpoint) {
>>> + /* dsi0_out node */
>>> + parent = of_graph_get_remote_port_parent(endpoint);
>>> + of_node_put(endpoint);
>>> + if (parent) {
>>> + /* dsi0 port 1 */
>>> + endpoint = of_graph_get_endpoint_by_regs(parent, 1, -1);
>>> + of_node_put(parent);
>>> + prop = of_find_property(endpoint, "data-lanes",
>>> + &len);
>>> + of_node_put(endpoint);
>>> + if (!prop) {
>>> + dev_err(tc->dev,
>>> + "failed to find data lane\n");
>>> + return -EPROBE_DEFER;
>>> + }
>>> + }
>>> + }
>>> +
>>> + tc->num_dsi_lanes = len / sizeof(u32);
>>> +
>>> + if (tc->num_dsi_lanes < 1 || tc->num_dsi_lanes > 4)
>>> + return -EINVAL;
>>> +
>>> + tc->host_node = of_graph_get_remote_node(np, 0, 0);
>>> + if (!tc->host_node)
>>> + return -ENODEV;
>>> +
>>> + of_node_put(tc->host_node);
>>> +
>>> + endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
>>> + TC358775_LVDS_OUT1, -1);
>>> + if (endpoint) {
>>> + remote = of_graph_get_remote_port_parent(endpoint);
>>> + of_node_put(endpoint);
>>> +
>>> + if (remote) {
>>> + if (of_device_is_available(remote))
>>> + tc->dual_link = true;
>>> + of_node_put(remote);
>>> + }
>>> + }
>>> +
>>> + dev_dbg(tc->dev, "no.of dsi lanes: %d\n", tc->num_dsi_lanes);
>>> + dev_dbg(tc->dev, "operating in %s-link mode\n",
>>> + tc->dual_link ? "dual" : "single");
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int tc_bridge_attach(struct drm_bridge *bridge,
>>> + enum drm_bridge_attach_flags flags)
>>> +{
>>> + struct tc_data *tc = bridge_to_tc(bridge);
>>> + struct device *dev = &tc->i2c->dev;
>>> + struct mipi_dsi_host *host;
>>> + struct mipi_dsi_device *dsi;
>>> + int ret;
>>> +
>>> + const struct mipi_dsi_device_info info = { .type = "tc358775",
>>> + .channel = 0,
>>> + .node = NULL,
>>> + };
>>> +
>>> + host = of_find_mipi_dsi_host_by_node(tc->host_node);
>>> + if (!host) {
>>> + dev_err(dev, "failed to find dsi host\n");
>>> + return -EPROBE_DEFER;
>>> + }
>>> +
>>> + dsi = mipi_dsi_device_register_full(host, &info);
>>> + if (IS_ERR(dsi)) {
>>> + dev_err(dev, "failed to create dsi device\n");
>>> + ret = PTR_ERR(dsi);
>>> + goto err_dsi_device;
>>> + }
>>> +
>>> + tc->dsi = dsi;
>>> +
>>> + dsi->lanes = tc->num_dsi_lanes;
>>> + dsi->format = MIPI_DSI_FMT_RGB888;
>>> + dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
>>> +
>>> + ret = mipi_dsi_attach(dsi);
>>> + if (ret < 0) {
>>> + dev_err(dev, "failed to attach dsi to host\n");
>>> + goto err_dsi_attach;
>>> + }
>>> +
>>> + /* Attach the panel-bridge to the dsi bridge */
>>> + return drm_bridge_attach(bridge->encoder, tc->panel_bridge,
>>> + &tc->bridge, flags);
>>> +err_dsi_attach:
>>> + mipi_dsi_device_unregister(dsi);
>>> +err_dsi_device:
>>> + return ret;
>>> +}
>>> +
>>> +static const struct drm_bridge_funcs tc_bridge_funcs = {
>>> + .attach = tc_bridge_attach,
>>> + .pre_enable = tc_bridge_pre_enable,
>>> + .enable = tc_bridge_enable,
>>> + .mode_valid = tc_mode_valid,
>>> + .post_disable = tc_bridge_post_disable,
>>> +};
>>> +
>>> +static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
>>> +{
>>> + struct device *dev = &client->dev;
>>> + struct drm_panel *panel;
>>> + struct tc_data *tc;
>>> + int ret;
>>> +
>>> + tc = devm_kzalloc(dev, sizeof(*tc), GFP_KERNEL);
>>> + if (!tc)
>>> + return -ENOMEM;
>>> +
>>> + tc->dev = dev;
>>> + tc->i2c = client;
>>> +
>>> + ret = drm_of_find_panel_or_bridge(dev->of_node, TC358775_LVDS_OUT0,
>>> + 0, &panel, NULL);
>>> + if (ret < 0)
>>> + return ret;
>>> + if (!panel)
>>> + return -ENODEV;
>>> +
>>> + tc->panel_bridge = devm_drm_panel_bridge_add(dev, panel);
>>> + if (IS_ERR(tc->panel_bridge))
>>> + return PTR_ERR(tc->panel_bridge);
>>> +
>>> + ret = tc358775_parse_dt(dev->of_node, tc);
>>> + if (ret)
>>> + return ret;
>>> +
>>> + tc->vddio = devm_regulator_get(dev, "vddio-supply");
>>> + if (IS_ERR(tc->vddio)) {
>>> + ret = PTR_ERR(tc->vddio);
>>> + dev_err(dev, "vddio-supply not found\n");
>>> + return ret;
>>> + }
>>> +
>>> + tc->vdd = devm_regulator_get(dev, "vdd-supply");
>>> + if (IS_ERR(tc->vdd)) {
>>> + ret = PTR_ERR(tc->vddio);
>>> + dev_err(dev, "vdd-supply not found\n");
>>> + return ret;
>>> + }
>>> +
>>> + tc->stby_gpio = devm_gpiod_get(dev, "stby", GPIOD_OUT_HIGH);
>>> + if (IS_ERR(tc->stby_gpio)) {
>>> + ret = PTR_ERR(tc->stby_gpio);
>>> + dev_err(dev, "cannot get stby-gpio %d\n", ret);
>>> + return ret;
>>> + }
>>> +
>>> + tc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
>>> + if (IS_ERR(tc->reset_gpio)) {
>>> + ret = PTR_ERR(tc->reset_gpio);
>>> + dev_err(dev, "cannot get reset-gpios %d\n", ret);
>>> + return ret;
>>> + }
>>> +
>>> + tc->bridge.funcs = &tc_bridge_funcs;
>>> + tc->bridge.of_node = dev->of_node;
>>> + drm_bridge_add(&tc->bridge);
>>> +
>>> + i2c_set_clientdata(client, tc);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int tc_remove(struct i2c_client *client)
>>> +{
>>> + struct tc_data *tc = i2c_get_clientdata(client);
>>> +
>>> + drm_bridge_remove(&tc->bridge);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static const struct i2c_device_id tc358775_i2c_ids[] = {
>>> + { "tc358775", 0 },
>>> + { }
>>> +};
>>> +MODULE_DEVICE_TABLE(i2c, tc358775_i2c_ids);
>>> +
>>> +static const struct of_device_id tc358775_of_ids[] = {
>>> + { .compatible = "toshiba,tc358775", },
>>> + { }
>>> +};
>>> +MODULE_DEVICE_TABLE(of, tc358775_of_ids);
>>> +
>>> +static struct i2c_driver tc358775_driver = {
>>> + .driver = {
>>> + .name = "tc358775",
>>> + .of_match_table = tc358775_of_ids,
>>> + },
>>> + .id_table = tc358775_i2c_ids,
>>> + .probe = tc_probe,
>>> + .remove = tc_remove,
>>> +};
>>> +module_i2c_driver(tc358775_driver);
>>> +
>>> +MODULE_AUTHOR("Vinay Simha BN <[email protected]>");
>>> +MODULE_DESCRIPTION("TC358775 DSI/LVDS bridge driver");
>>> +MODULE_LICENSE("GPL v2");
>>>
>>
>
>