Add documentation for DT properties supported by
ps8640 DSI-eDP converter.
Signed-off-by: Jitao Shi <[email protected]>
Acked-by: Rob Herring <[email protected]>
Reviewed-by: Philipp Zabel <[email protected]>
---
Changes since v3
- add ps8640 support patchset and drop RFC
---
.../devicetree/bindings/display/bridge/ps8640.txt | 43 ++++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/bridge/ps8640.txt
diff --git a/Documentation/devicetree/bindings/display/bridge/ps8640.txt b/Documentation/devicetree/bindings/display/bridge/ps8640.txt
new file mode 100644
index 0000000..a3e0971
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/ps8640.txt
@@ -0,0 +1,43 @@
+ps8640-bridge bindings
+
+Required properties:
+ - compatible: "parade,ps8640"
+ - reg: first page address of the bridge.
+ - sleep-gpios: OF device-tree gpio specification for PD_ pin.
+ - reset-gpios: OF device-tree gpio specification for reset pin.
+ - mode-sel-gpios: OF device-tree gpio specification for mode-sel pin.
+ - vdd12-supply: OF device-tree regulator specification for 1.2V power.
+ - vdd33-supply: OF device-tree regulator specification for 3.3V power.
+ - ports: The device node can contain video interface port nodes per
+ the video-interfaces bind[1]. For port@0,set the reg = <0> as
+ ps8640 dsi in and port@1,set the reg = <1> as ps8640 eDP out.
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
+
+Example:
+ edp-bridge@18 {
+ compatible = "parade,ps8640";
+ reg = <0x18>;
+ sleep-gpios = <&pio 116 GPIO_ACTIVE_HIGH>;
+ reset-gpios = <&pio 115 GPIO_ACTIVE_HIGH>;
+ mode-sel-gpios = <&pio 92 GPIO_ACTIVE_HIGH>;
+ vdd12-supply = <&ps8640_fixed_1v2>;
+ vdd33-supply = <&mt6397_vgp2_reg>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ ps8640_in: endpoint {
+ remote-endpoint = <&dsi0_out>;
+ };
+ };
+ port@1 {
+ reg = <1>;
+ ps8640_out: endpoint {
+ remote-endpoint = <&panel_in>;
+ };
+ };
+ };
+ };
--
1.7.9.5
This patch adds drm_bridge driver for parade DSI to eDP bridge chip.
Signed-off-by: Jitao Shi <[email protected]>
---
Changes since v3
-add ps8640 support patchset and drop RFC
-remove .owner = THIS_MODULE,
---
drivers/gpu/drm/bridge/Kconfig | 10 +
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/parade-ps8640.c | 471 ++++++++++++++++++++++++++++++++
3 files changed, 482 insertions(+)
create mode 100644 drivers/gpu/drm/bridge/parade-ps8640.c
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 6dddd39..4117b33 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -41,4 +41,14 @@ config DRM_PARADE_PS8622
---help---
Parade eDP-LVDS bridge chip driver.
+config DRM_PARADE_PS8640
+ bool "Parade PS8640 MIPI DSI to eDP Converter"
+ depends on OF
+ select DRM_KMS_HELPER
+ select DRM_PANEL
+ ---help---
+ Choose this option if you have PS8640 for display
+ The PS8640 is a high-performance and low-power
+ MIPI DSI to eDP converter
+
endmenu
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index d4e28be..272e3c01 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -4,3 +4,4 @@ obj-$(CONFIG_DRM_DW_HDMI) += dw_hdmi.o
obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw_hdmi-ahb-audio.o
obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
+obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o
diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
new file mode 100644
index 0000000..7c83afa
--- /dev/null
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -0,0 +1,471 @@
+/*
+ * Copyright (c) 2014 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_panel.h>
+
+#include <drmP.h>
+#include <drm_crtc_helper.h>
+#include <drm_crtc.h>
+#include <drm_mipi_dsi.h>
+#include <drm_atomic_helper.h>
+
+#define PAGE2_GPIO_L 0xa6
+#define PAGE2_GPIO_H 0xa7
+#define PS_GPIO9 BIT(1)
+#define PAGE2_I2C_BYPASS 0xea
+#define I2C_BYPASS_EN 0xd0
+
+#define PAGE3_SET_ADD 0xfe
+#define PAGE3_SET_VAL 0xff
+#define VDO_CTL_ADD 0x13
+#define VDO_DIS 0x18
+#define VDO_EN 0x1c
+
+#define PAGE4_REV_L 0xf0
+#define PAGE4_REV_H 0xf1
+#define PAGE4_CHIP_L 0xf2
+#define PAGE4_CHIP_H 0xf3
+
+#define bridge_to_ps8640(e) container_of(e, struct ps8640, bridge)
+#define connector_to_ps8640(e) container_of(e, struct ps8640, connector)
+
+struct ps8640 {
+ struct drm_connector connector;
+ struct drm_bridge bridge;
+ struct i2c_client *page[6];
+ struct ps8640_driver_data *driver_data;
+ struct regulator *pwr_1v2_supply;
+ struct regulator *pwr_3v3_supply;
+ struct drm_panel *panel;
+ struct gpio_desc *gpio_rst_n;
+ struct gpio_desc *gpio_slp_n;
+ struct gpio_desc *gpio_mode_sel_n;
+ bool enabled;
+};
+
+static int ps8640_regr(struct i2c_client *client, u8 reg, u8 *value)
+{
+ int ret;
+
+ ret = i2c_master_send(client, ®, 1);
+ if (ret <= 0) {
+ dev_err(&client->dev, "Failed to send i2c command, ret=%d\n",
+ ret);
+ return ret;
+ }
+
+ ret = i2c_master_recv(client, value, 1);
+ if (ret <= 0) {
+ dev_err(&client->dev, "Failed to recv i2c data, ret=%d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ps8640_regw(struct i2c_client *client, u8 reg, u8 value)
+{
+ int ret;
+ char buf[2];
+
+ buf[0] = reg;
+ buf[1] = value;
+ ret = i2c_master_send(client, buf, ARRAY_SIZE(buf));
+ if (ret <= 0) {
+ dev_err(&client->dev, "Failed to send i2c command, ret=%d\n",
+ ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static bool ps8640_check_valid_id(struct ps8640 *ps_bridge)
+{
+ struct i2c_client *client = ps_bridge->page[4];
+ u8 rev_id_low, rev_id_high, chip_id_low, chip_id_high;
+ int retry_cnt = 0;
+
+ do {
+ ps8640_regr(client, PAGE4_CHIP_H, &chip_id_high);
+ if (chip_id_high != 0x30)
+ dev_info(&client->dev, "chip_id_high = 0x%x\n",
+ chip_id_high);
+ } while ((retry_cnt++ < 2) && (chip_id_high != 0x30));
+
+ ps8640_regr(client, PAGE4_REV_L, &rev_id_low);
+ ps8640_regr(client, PAGE4_REV_H, &rev_id_high);
+ ps8640_regr(client, PAGE4_CHIP_L, &chip_id_low);
+
+ if ((rev_id_low == 0x00) && (rev_id_high == 0x0a) &&
+ (chip_id_low == 0x00) && (chip_id_high == 0x30))
+ return true;
+
+ return false;
+}
+
+static void ps8640_show_mcu_fw_version(struct ps8640 *ps_bridge)
+{
+ struct i2c_client *client = ps_bridge->page[5];
+ u8 major_ver, minor_ver;
+
+ ps8640_regr(client, 0x4, &major_ver);
+ ps8640_regr(client, 0x5, &minor_ver);
+
+ DRM_INFO_ONCE("ps8640 rom fw version %d.%d\n", major_ver, minor_ver);
+}
+
+static int ps8640_bdg_enable(struct ps8640 *ps_bridge)
+{
+ struct i2c_client *client = ps_bridge->page[3];
+
+ if (ps8640_check_valid_id(ps_bridge)) {
+ ps8640_regw(client, PAGE3_SET_ADD, VDO_CTL_ADD);
+ ps8640_regw(client, PAGE3_SET_VAL, VDO_DIS);
+ ps8640_regw(client, PAGE3_SET_ADD, VDO_CTL_ADD);
+ ps8640_regw(client, PAGE3_SET_VAL, VDO_DIS);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static void ps8640_prepare(struct ps8640 *ps_bridge)
+{
+ struct i2c_client *client = ps_bridge->page[2];
+ int err, retry_cnt = 0;
+ u8 set_vdo_done;
+
+ if (ps_bridge->enabled)
+ return;
+
+ err = drm_panel_prepare(ps_bridge->panel);
+ if (err < 0) {
+ DRM_ERROR("failed to prepare panel: %d\n", err);
+ return;
+ }
+
+ /* delay for power stable */
+ usleep_range(500, 700);
+
+ err = regulator_enable(ps_bridge->pwr_1v2_supply);
+ if (err < 0) {
+ DRM_ERROR("failed to enable vdd12-supply: %d\n", err);
+ goto err_panel_unprepare;
+ }
+
+ err = regulator_enable(ps_bridge->pwr_3v3_supply);
+ if (err < 0) {
+ DRM_ERROR("failed to enable vdd33-supply: %d\n", err);
+ goto err_regulator_disable;
+ }
+
+ gpiod_set_value(ps_bridge->gpio_slp_n, 1);
+ gpiod_set_value(ps_bridge->gpio_rst_n, 0);
+ usleep_range(500, 700);
+ gpiod_set_value(ps_bridge->gpio_rst_n, 1);
+
+ do {
+ msleep(50);
+ ps8640_regr(client, PAGE2_GPIO_H, &set_vdo_done);
+ } while ((retry_cnt++ < 70) && ((set_vdo_done & PS_GPIO9) != PS_GPIO9));
+
+ ps8640_show_mcu_fw_version(ps_bridge);
+ ps_bridge->enabled = true;
+
+ return;
+
+err_regulator_disable:
+ regulator_disable(ps_bridge->pwr_1v2_supply);
+err_panel_unprepare:
+ drm_panel_unprepare(ps_bridge->panel);
+}
+
+static void ps8640_pre_enable(struct drm_bridge *bridge)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+
+ ps8640_prepare(ps_bridge);
+}
+
+static void ps8640_enable(struct drm_bridge *bridge)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+ int err;
+
+ ps8640_bdg_enable(ps_bridge);
+
+ err = drm_panel_enable(ps_bridge->panel);
+ if (err < 0)
+ DRM_ERROR("failed to enable panel: %d\n", err);
+}
+
+static void ps8640_disable(struct drm_bridge *bridge)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+ int err;
+
+ if (!ps_bridge->enabled)
+ return;
+
+ ps_bridge->enabled = false;
+
+ err = drm_panel_disable(ps_bridge->panel);
+ if (err < 0)
+ DRM_ERROR("failed to disable panel: %d\n", err);
+
+ regulator_disable(ps_bridge->pwr_1v2_supply);
+ regulator_disable(ps_bridge->pwr_3v3_supply);
+ gpiod_set_value(ps_bridge->gpio_rst_n, 0);
+ gpiod_set_value(ps_bridge->gpio_slp_n, 0);
+}
+
+static void ps8640_post_disable(struct drm_bridge *bridge)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+ int err;
+
+ err = drm_panel_unprepare(ps_bridge->panel);
+ if (err)
+ DRM_ERROR("failed to unprepare panel: %d\n", err);
+}
+
+static int ps8640_get_modes(struct drm_connector *connector)
+{
+ struct ps8640 *ps_bridge = connector_to_ps8640(connector);
+ struct i2c_client *client = ps_bridge->page[2];
+
+ ps8640_prepare(ps_bridge);
+ ps8640_regw(client, PAGE2_I2C_BYPASS, I2C_BYPASS_EN);
+
+ return drm_panel_get_modes(ps_bridge->panel);
+}
+
+static struct drm_encoder *ps8640_best_encoder(struct drm_connector *connector)
+{
+ struct ps8640 *ps_bridge;
+
+ ps_bridge = connector_to_ps8640(connector);
+ return ps_bridge->bridge.encoder;
+}
+
+static const struct drm_connector_helper_funcs
+ ps8640_connector_helper_funcs = {
+ .get_modes = ps8640_get_modes,
+ .best_encoder = ps8640_best_encoder,
+};
+
+static enum drm_connector_status ps8640_detect(struct drm_connector *connector,
+ bool force)
+{
+ return connector_status_connected;
+}
+
+static void ps8640_connector_destroy(struct drm_connector *connector)
+{
+ drm_connector_unregister(connector);
+ drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs ps8640_connector_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = ps8640_detect,
+ .destroy = ps8640_connector_destroy,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+int ps8640_bridge_attach(struct drm_bridge *bridge)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+ int ret;
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ ret = drm_connector_init(bridge->dev, &ps_bridge->connector,
+ &ps8640_connector_funcs,
+ DRM_MODE_CONNECTOR_eDP);
+
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector with drm: %d\n", ret);
+ return ret;
+ }
+
+ drm_connector_helper_add(&ps_bridge->connector,
+ &ps8640_connector_helper_funcs);
+ drm_connector_register(&ps_bridge->connector);
+
+ ps_bridge->connector.dpms = DRM_MODE_DPMS_ON;
+ drm_mode_connector_attach_encoder(&ps_bridge->connector,
+ bridge->encoder);
+
+ if (ps_bridge->panel)
+ drm_panel_attach(ps_bridge->panel, &ps_bridge->connector);
+
+ return ret;
+}
+
+static bool ps8640_bridge_mode_fixup(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ return true;
+}
+
+static const struct drm_bridge_funcs ps8640_bridge_funcs = {
+ .attach = ps8640_bridge_attach,
+ .mode_fixup = ps8640_bridge_mode_fixup,
+ .disable = ps8640_disable,
+ .post_disable = ps8640_post_disable,
+ .pre_enable = ps8640_pre_enable,
+ .enable = ps8640_enable,
+};
+
+static int ps8640_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct ps8640 *ps_bridge;
+ struct device_node *np = dev->of_node;
+ struct device_node *port, *out_ep;
+ struct device_node *panel_node = NULL;
+ int i, ret;
+
+ ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL);
+ if (!ps_bridge)
+ return -ENOMEM;
+
+ /* port@1 is ps8640 output port */
+ port = of_graph_get_port_by_id(np, 1);
+ if (port) {
+ out_ep = of_get_child_by_name(port, "endpoint");
+ of_node_put(port);
+ if (out_ep) {
+ panel_node = of_graph_get_remote_port_parent(out_ep);
+ of_node_put(out_ep);
+ }
+ }
+ if (panel_node) {
+ ps_bridge->panel = of_drm_find_panel(panel_node);
+ of_node_put(panel_node);
+ if (!ps_bridge->panel)
+ return -EPROBE_DEFER;
+ }
+
+ ps_bridge->page[0] = client;
+ for (i = 1; i < 6; i++)
+ ps_bridge->page[i] = i2c_new_dummy(client->adapter,
+ client->addr + i);
+
+ ps_bridge->pwr_3v3_supply = devm_regulator_get(dev, "vdd33");
+ if (IS_ERR(ps_bridge->pwr_3v3_supply)) {
+ ret = PTR_ERR(ps_bridge->pwr_3v3_supply);
+ dev_err(dev, "cannot get vdd33 supply: %d\n", ret);
+ return ret;
+ }
+
+ ps_bridge->pwr_1v2_supply = devm_regulator_get(dev, "vdd12");
+ if (IS_ERR(ps_bridge->pwr_1v2_supply)) {
+ ret = PTR_ERR(ps_bridge->pwr_1v2_supply);
+ dev_err(dev, "cannot get vdd12 supply: %d\n", ret);
+ return ret;
+ }
+
+ ps_bridge->gpio_mode_sel_n = devm_gpiod_get(&client->dev, "mode-sel",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(ps_bridge->gpio_mode_sel_n)) {
+ ret = PTR_ERR(ps_bridge->gpio_mode_sel_n);
+ dev_err(dev, "cannot get gpio_mode_sel_n %d\n", ret);
+ return ret;
+ }
+
+ ps_bridge->gpio_slp_n = devm_gpiod_get(&client->dev, "sleep",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(ps_bridge->gpio_slp_n)) {
+ ret = PTR_ERR(ps_bridge->gpio_slp_n);
+ dev_err(dev, "cannot get gpio_slp_n: %d\n", ret);
+ return ret;
+ }
+
+ ps_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(ps_bridge->gpio_rst_n)) {
+ ret = PTR_ERR(ps_bridge->gpio_rst_n);
+ dev_err(dev, "cannot get gpio_rst_n: %d\n", ret);
+ return ret;
+ }
+
+ ps_bridge->bridge.funcs = &ps8640_bridge_funcs;
+ ps_bridge->bridge.of_node = dev->of_node;
+ ret = drm_bridge_add(&ps_bridge->bridge);
+ if (ret) {
+ dev_err(dev, "Failed to add bridge: %d\n", ret);
+ return ret;
+ }
+
+ i2c_set_clientdata(client, ps_bridge);
+
+ return 0;
+}
+
+static int ps8640_remove(struct i2c_client *client)
+{
+ struct ps8640 *ps_bridge = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&ps_bridge->bridge);
+
+ return 0;
+}
+
+static const struct i2c_device_id ps8640_i2c_table[] = {
+ {"parade,ps8640", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, ps8640_i2c_table);
+
+static const struct of_device_id ps8640_match[] = {
+ { .compatible = "parade,ps8640" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ps8640_match);
+
+static struct i2c_driver ps8640_driver = {
+ .id_table = ps8640_i2c_table,
+ .probe = ps8640_probe,
+ .remove = ps8640_remove,
+ .driver = {
+ .name = "parade,ps8640",
+ .of_match_table = ps8640_match,
+ },
+};
+module_i2c_driver(ps8640_driver);
+
+MODULE_AUTHOR("Jitao Shi <[email protected]>");
+MODULE_AUTHOR("CK Hu <[email protected]>");
+MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver");
+MODULE_LICENSE("GPL v2");
--
1.7.9.5
Hi Jitao,
[auto build test ERROR on: drm/drm-next]
[also build test ERROR on: v4.4-rc1 next-20151120]
url: https://github.com/0day-ci/linux/commits/Jitao-Shi/Documentation-bridge-Add-documentation-for-ps8640-DT-properties/20151122-180613
base: git://people.freedesktop.org/~airlied/linux.git drm-next
config: alpha-allmodconfig (attached as .config)
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=alpha
All errors (new ones prefixed by >>):
drivers/built-in.o: In function `ps8640_post_disable':
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8b944): undefined reference to `drm_err'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8b94c): undefined reference to `drm_err'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8b990): undefined reference to `drm_err'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8b99c): undefined reference to `drm_err'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8b9b8): undefined reference to `drm_connector_init'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8b9c8): undefined reference to `drm_connector_init'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8b9e0): undefined reference to `drm_err'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8b9ec): undefined reference to `drm_err'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8ba00): undefined reference to `drm_connector_register'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8ba14): undefined reference to `drm_connector_register'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8ba28): undefined reference to `drm_mode_connector_attach_encoder'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8ba30): undefined reference to `drm_mode_connector_attach_encoder'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8ba44): undefined reference to `drm_panel_attach'
drivers/built-in.o: In function `ps8640_bridge_attach':
(.text+0x8ba4c): undefined reference to `drm_panel_attach'
drivers/built-in.o: In function `ps8640_disable':
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bad0): undefined reference to `drm_err'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bad8): undefined reference to `drm_err'
drivers/built-in.o: In function `ps8640_regw':
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bb6c): undefined reference to `i2c_master_send'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bba4): undefined reference to `i2c_master_send'
drivers/built-in.o: In function `ps8640_regr':
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bc00): undefined reference to `i2c_master_send'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bc34): undefined reference to `i2c_master_send'
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bc70): undefined reference to `i2c_master_recv'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bc80): undefined reference to `i2c_master_recv'
drivers/built-in.o: In function `ps8640_connector_destroy':
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bce0): undefined reference to `drm_connector_unregister'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bcf0): undefined reference to `drm_connector_unregister'
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bd00): undefined reference to `drm_connector_cleanup'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bd04): undefined reference to `drm_connector_cleanup'
drivers/built-in.o: In function `ps8640_remove':
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bd2c): undefined reference to `drm_bridge_remove'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bd3c): undefined reference to `drm_bridge_remove'
drivers/built-in.o: In function `ps8640_prepare':
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bdb8): undefined reference to `drm_err'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8bdc0): undefined reference to `drm_err'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8be08): undefined reference to `drm_err'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8be10): undefined reference to `drm_err'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8be40): undefined reference to `drm_err'
drivers/built-in.o:drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8be48): more undefined references to `drm_err' follow
drivers/built-in.o: In function `ps8640_probe':
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8c388): undefined reference to `of_drm_find_panel'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8c390): undefined reference to `of_drm_find_panel'
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8c3d8): undefined reference to `i2c_new_dummy'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8c3f0): undefined reference to `i2c_new_dummy'
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8c560): undefined reference to `drm_bridge_add'
drivers/gpu/drm/bridge/parade-ps8640.o:(.text+0x8c578): undefined reference to `drm_bridge_add'
drivers/built-in.o: In function `ps8640_driver_init':
>> drivers/gpu/drm/bridge/parade-ps8640.o:(.init.text+0x589c): undefined reference to `i2c_register_driver'
drivers/gpu/drm/bridge/parade-ps8640.o:(.init.text+0x58ac): undefined reference to `i2c_register_driver'
>> drivers/built-in.o:(.data.rel.ro+0x12a0): undefined reference to `drm_atomic_helper_connector_dpms'
>> drivers/built-in.o:(.data.rel.ro+0x12b8): undefined reference to `drm_atomic_helper_connector_reset'
>> drivers/built-in.o:(.data.rel.ro+0x12c8): undefined reference to `drm_helper_probe_single_connector_modes'
>> drivers/built-in.o:(.data.rel.ro+0x12e8): undefined reference to `drm_atomic_helper_connector_duplicate_state'
>> drivers/built-in.o:(.data.rel.ro+0x12f0): undefined reference to `drm_atomic_helper_connector_destroy_state'
---
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