[PATCH 1/2] drm/panel: Add Raydium RM67191 DSI Panel

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Add support for the OLED display based on MIPI-DSI protocol from Raydium:
RM67191.

Signed-off-by: Robert Chiras <robert.chiras@xxxxxxx>
---
 .../bindings/display/panel/raydium,rm67191.txt     |  55 ++
 drivers/gpu/drm/panel/Kconfig                      |   9 +
 drivers/gpu/drm/panel/Makefile                     |   1 +
 drivers/gpu/drm/panel/panel-raydium-rm67191.c      | 645 +++++++++++++++++++++
 4 files changed, 710 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/raydium,rm67191.txt
 create mode 100644 drivers/gpu/drm/panel/panel-raydium-rm67191.c

diff --git a/Documentation/devicetree/bindings/display/panel/raydium,rm67191.txt b/Documentation/devicetree/bindings/display/panel/raydium,rm67191.txt
new file mode 100644
index 0000000..18a57de
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/raydium,rm67191.txt
@@ -0,0 +1,55 @@
+Raydium RM67171 OLED LCD panel with MIPI-DSI protocol
+
+Required properties:
+- compatible: 		"raydium,rm67191"
+- reg:			virtual channel for MIPI-DSI protocol
+			must be <0>
+- dsi-lanes:		number of DSI lanes to be used
+			must be <3> or <4>
+- port: 		input port node with endpoint definition as
+			defined in Documentation/devicetree/bindings/graph.txt;
+			the input port should be connected to a MIPI-DSI device
+			driver
+
+Optional properties:
+- reset-gpio:		a GPIO spec for the RST_B GPIO pin
+- display-timings:	timings for the connected panel according to [1]
+- pinctrl-0		phandle to the pin settings for the reset pin
+- panel-width-mm:	physical panel width [mm]
+- panel-height-mm:	physical panel height [mm]
+
+[1]: Documentation/devicetree/bindings/display/display-timing.txt
+
+Example:
+
+	panel@0 {
+		compatible = "raydium,rm67191";
+		reg = <0>;
+		pinctrl-0 = <&pinctrl_mipi_dsi_0_1_en>;
+		reset-gpio = <&gpio1 7 GPIO_ACTIVE_HIGH>;
+		dsi-lanes = <4>;
+		panel-width-mm = <68>;
+		panel-height-mm = <121>;
+		display-timings {
+			timing {
+				clock-frequency = <132000000>;
+				hactive = <1080>;
+				vactive = <1920>;
+				hback-porch = <11>;
+				hfront-porch = <4>;
+				vback-porch = <48>;
+				vfront-porch = <20>;
+				hsync-len = <5>;
+				vsync-len = <12>;
+				hsync-active = <0>;
+				vsync-active = <0>;
+				de-active = <0>;
+				pixelclk-active = <0>;
+			};
+		};
+		port {
+			panel1_in: endpoint {
+				remote-endpoint = <&mipi1_out>;
+			};
+		};
+	};
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 6ba4031..769cba7 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -158,4 +158,13 @@ config DRM_PANEL_SITRONIX_ST7789V
 	  Say Y here if you want to enable support for the Sitronix
 	  ST7789V controller for 240x320 LCD panels
 
+config DRM_PANEL_RAYDIUM_RM67191
+	tristate "Raydium RM67191 FHD panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for Raydium RM67191 FHD
+	  (1080x1920) DSI panel.
+
 endmenu
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 6d251eb..838d5c6 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -16,3 +16,4 @@ obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
 obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
+obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM67191) += panel-raydium-rm67191.o
diff --git a/drivers/gpu/drm/panel/panel-raydium-rm67191.c b/drivers/gpu/drm/panel/panel-raydium-rm67191.c
new file mode 100644
index 0000000..07b0bd4
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-raydium-rm67191.c
@@ -0,0 +1,645 @@
+/*
+ * i.MX drm driver - Raydium MIPI-DSI panel driver
+ *
+ * Copyright (C) 2017 NXP
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 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 <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+#include <video/mipi_display.h>
+#include <video/of_videomode.h>
+#include <video/videomode.h>
+
+#define CMD_TABLE_LEN 2
+typedef u8 cmd_set_table[CMD_TABLE_LEN];
+
+/* Write Manufacture Command Set Control */
+#define WRMAUCCTR 0xFE
+
+/* Manufacturer Command Set pages (CMD2) */
+static const cmd_set_table manufacturer_cmd_set[] = {
+	{0xFE, 0x0B},
+	{0x28, 0x40},
+	{0x29, 0x4F},
+	{0xFE, 0x0E},
+	{0x4B, 0x00},
+	{0x4C, 0x0F},
+	{0x4D, 0x20},
+	{0x4E, 0x40},
+	{0x4F, 0x60},
+	{0x50, 0xA0},
+	{0x51, 0xC0},
+	{0x52, 0xE0},
+	{0x53, 0xFF},
+	{0xFE, 0x0D},
+	{0x18, 0x08},
+	{0x42, 0x00},
+	{0x08, 0x41},
+	{0x46, 0x02},
+	{0x72, 0x09},
+	{0xFE, 0x0A},
+	{0x24, 0x17},
+	{0x04, 0x07},
+	{0x1A, 0x0C},
+	{0x0F, 0x44},
+	{0xFE, 0x04},
+	{0x00, 0x0C},
+	{0x05, 0x08},
+	{0x06, 0x08},
+	{0x08, 0x08},
+	{0x09, 0x08},
+	{0x0A, 0xE6},
+	{0x0B, 0x8C},
+	{0x1A, 0x12},
+	{0x1E, 0xE0},
+	{0x29, 0x93},
+	{0x2A, 0x93},
+	{0x2F, 0x02},
+	{0x31, 0x02},
+	{0x33, 0x05},
+	{0x37, 0x2D},
+	{0x38, 0x2D},
+	{0x3A, 0x1E},
+	{0x3B, 0x1E},
+	{0x3D, 0x27},
+	{0x3F, 0x80},
+	{0x40, 0x40},
+	{0x41, 0xE0},
+	{0x4F, 0x2F},
+	{0x50, 0x1E},
+	{0xFE, 0x06},
+	{0x00, 0xCC},
+	{0x05, 0x05},
+	{0x07, 0xA2},
+	{0x08, 0xCC},
+	{0x0D, 0x03},
+	{0x0F, 0xA2},
+	{0x32, 0xCC},
+	{0x37, 0x05},
+	{0x39, 0x83},
+	{0x3A, 0xCC},
+	{0x41, 0x04},
+	{0x43, 0x83},
+	{0x44, 0xCC},
+	{0x49, 0x05},
+	{0x4B, 0xA2},
+	{0x4C, 0xCC},
+	{0x51, 0x03},
+	{0x53, 0xA2},
+	{0x75, 0xCC},
+	{0x7A, 0x03},
+	{0x7C, 0x83},
+	{0x7D, 0xCC},
+	{0x82, 0x02},
+	{0x84, 0x83},
+	{0x85, 0xEC},
+	{0x86, 0x0F},
+	{0x87, 0xFF},
+	{0x88, 0x00},
+	{0x8A, 0x02},
+	{0x8C, 0xA2},
+	{0x8D, 0xEA},
+	{0x8E, 0x01},
+	{0x8F, 0xE8},
+	{0xFE, 0x06},
+	{0x90, 0x0A},
+	{0x92, 0x06},
+	{0x93, 0xA0},
+	{0x94, 0xA8},
+	{0x95, 0xEC},
+	{0x96, 0x0F},
+	{0x97, 0xFF},
+	{0x98, 0x00},
+	{0x9A, 0x02},
+	{0x9C, 0xA2},
+	{0xAC, 0x04},
+	{0xFE, 0x06},
+	{0xB1, 0x12},
+	{0xB2, 0x17},
+	{0xB3, 0x17},
+	{0xB4, 0x17},
+	{0xB5, 0x17},
+	{0xB6, 0x11},
+	{0xB7, 0x08},
+	{0xB8, 0x09},
+	{0xB9, 0x06},
+	{0xBA, 0x07},
+	{0xBB, 0x17},
+	{0xBC, 0x17},
+	{0xBD, 0x17},
+	{0xBE, 0x17},
+	{0xBF, 0x17},
+	{0xC0, 0x17},
+	{0xC1, 0x17},
+	{0xC2, 0x17},
+	{0xC3, 0x17},
+	{0xC4, 0x0F},
+	{0xC5, 0x0E},
+	{0xC6, 0x00},
+	{0xC7, 0x01},
+	{0xC8, 0x10},
+	{0xFE, 0x06},
+	{0x95, 0xEC},
+	{0x8D, 0xEE},
+	{0x44, 0xEC},
+	{0x4C, 0xEC},
+	{0x32, 0xEC},
+	{0x3A, 0xEC},
+	{0x7D, 0xEC},
+	{0x75, 0xEC},
+	{0x00, 0xEC},
+	{0x08, 0xEC},
+	{0x85, 0xEC},
+	{0xA6, 0x21},
+	{0xA7, 0x05},
+	{0xA9, 0x06},
+	{0x82, 0x06},
+	{0x41, 0x06},
+	{0x7A, 0x07},
+	{0x37, 0x07},
+	{0x05, 0x06},
+	{0x49, 0x06},
+	{0x0D, 0x04},
+	{0x51, 0x04},
+};
+
+struct rad_panel {
+	struct drm_panel base;
+	struct mipi_dsi_device *dsi;
+
+	struct gpio_desc *reset;
+	struct backlight_device *backlight;
+
+	bool prepared;
+	bool enabled;
+
+	struct videomode vm;
+	u32 width_mm;
+	u32 height_mm;
+};
+
+static inline struct rad_panel *to_rad_panel(struct drm_panel *panel)
+{
+	return container_of(panel, struct rad_panel, base);
+}
+
+static int rad_panel_push_cmd_list(struct mipi_dsi_device *dsi)
+{
+	size_t i;
+	const u8 *cmd;
+	size_t count = sizeof(manufacturer_cmd_set) / CMD_TABLE_LEN;
+	int ret = 0;
+
+	for (i = 0; i < count ; i++) {
+		cmd = manufacturer_cmd_set[i];
+		ret = mipi_dsi_generic_write(dsi, cmd, CMD_TABLE_LEN);
+		if (ret < 0)
+			return ret;
+	}
+
+	return ret;
+};
+
+static int rad_panel_prepare(struct drm_panel *panel)
+{
+	struct rad_panel *rad = to_rad_panel(panel);
+	struct mipi_dsi_device *dsi = rad->dsi;
+	struct device *dev = &dsi->dev;
+	int ret;
+
+	if (rad->prepared)
+		return 0;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+	if (rad->reset != NULL) {
+		gpiod_set_value(rad->reset, 1);
+		usleep_range(10000, 15000);
+		gpiod_set_value(rad->reset, 0);
+		usleep_range(5000, 10000);
+		gpiod_set_value(rad->reset, 1);
+		usleep_range(20000, 25000);
+	}
+
+	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	ret = rad_panel_push_cmd_list(dsi);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to send MCS (%d)\n", ret);
+		goto fail;
+	}
+
+	/* Select User Command Set table (CMD1) */
+	ret = mipi_dsi_generic_write(dsi, (u8[]){ WRMAUCCTR, 0x00 }, 2);
+	if (ret < 0)
+		goto fail;
+
+	/* Software reset */
+	ret = mipi_dsi_dcs_soft_reset(dsi);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to do Software Reset (%d)\n", ret);
+		goto fail;
+	}
+
+	usleep_range(10000, 15000);
+
+	/* Set DSI mode */
+	ret = mipi_dsi_generic_write(dsi, (u8[]){ 0xC2, 0x0B }, 2);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to set DSI mode (%d)\n", ret);
+		goto fail;
+	}
+	/* Set tear ON */
+	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to set tear ON (%d)\n", ret);
+		goto fail;
+	}
+	/* Set tear scanline */
+	ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x380);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to set tear scanline (%d)\n", ret);
+		goto fail;
+	}
+	/* Set pixel format to RGB888 */
+	ret = mipi_dsi_dcs_set_pixel_format(dsi, 0x77);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to set pixel format (%d)\n", ret);
+		goto fail;
+	}
+	/* Set display brightness */
+	ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x20);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to set display brightness (%d)\n",
+			      ret);
+		goto fail;
+	}
+	/* Exit sleep mode */
+	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to exit sleep mode (%d)\n", ret);
+		goto fail;
+	}
+
+	usleep_range(5000, 10000);
+
+	ret = mipi_dsi_dcs_set_display_on(dsi);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to set display ON (%d)\n", ret);
+		goto fail;
+	}
+
+	rad->prepared = true;
+
+	return 0;
+
+fail:
+	if (rad->reset != NULL)
+		gpiod_set_value(rad->reset, 0);
+
+	return ret;
+}
+
+static int rad_panel_unprepare(struct drm_panel *panel)
+{
+	struct rad_panel *rad = to_rad_panel(panel);
+	struct mipi_dsi_device *dsi = rad->dsi;
+	struct device *dev = &dsi->dev;
+	int ret;
+
+	if (!rad->prepared)
+		return 0;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	ret = mipi_dsi_dcs_set_display_off(dsi);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "Failed to set display OFF (%d)\n", ret);
+
+	usleep_range(5000, 10000);
+
+	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "Failed to enter sleep mode (%d)\n", ret);
+
+	usleep_range(10000, 15000);
+
+	if (rad->reset != NULL) {
+		gpiod_set_value(rad->reset, 0);
+		usleep_range(10000, 15000);
+	}
+
+	rad->prepared = false;
+
+	return 0;
+}
+
+static int rad_panel_enable(struct drm_panel *panel)
+{
+	struct rad_panel *rad = to_rad_panel(panel);
+	struct device *dev = &rad->dsi->dev;
+
+	if (rad->enabled)
+		return 0;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+	rad->backlight->props.power = FB_BLANK_UNBLANK;
+	backlight_update_status(rad->backlight);
+
+	rad->enabled = true;
+
+	return 0;
+}
+
+static int rad_panel_disable(struct drm_panel *panel)
+{
+	struct rad_panel *rad = to_rad_panel(panel);
+	struct device *dev = &rad->dsi->dev;
+
+	if (!rad->enabled)
+		return 0;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+	rad->backlight->props.power = FB_BLANK_POWERDOWN;
+	backlight_update_status(rad->backlight);
+
+	rad->enabled = false;
+
+	return 0;
+}
+
+static int rad_panel_get_modes(struct drm_panel *panel)
+{
+	struct rad_panel *rad = to_rad_panel(panel);
+	struct device *dev = &rad->dsi->dev;
+	struct drm_connector *connector = panel->connector;
+	struct drm_display_mode *mode;
+	u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+	u32 *bus_flags = &connector->display_info.bus_flags;
+	int ret;
+
+	mode = drm_mode_create(connector->dev);
+	if (!mode) {
+		DRM_DEV_ERROR(dev, "Failed to create display mode!\n");
+		return 0;
+	}
+
+	drm_display_mode_from_videomode(&rad->vm, mode);
+	mode->width_mm = rad->width_mm;
+	mode->height_mm = rad->height_mm;
+	connector->display_info.width_mm = rad->width_mm;
+	connector->display_info.height_mm = rad->height_mm;
+	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+
+	if (rad->vm.flags & DISPLAY_FLAGS_DE_HIGH)
+		*bus_flags |= DRM_BUS_FLAG_DE_HIGH;
+	if (rad->vm.flags & DISPLAY_FLAGS_DE_LOW)
+		*bus_flags |= DRM_BUS_FLAG_DE_LOW;
+	if (rad->vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+		*bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
+	if (rad->vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
+		*bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
+
+	ret = drm_display_info_set_bus_formats(&connector->display_info,
+					       &bus_format, 1);
+	if (ret)
+		return ret;
+
+	drm_mode_probed_add(panel->connector, mode);
+
+	return 1;
+}
+
+static int rad_bl_get_brightness(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
+	struct device *dev = &dsi->dev;
+	u16 brightness;
+	int ret;
+
+	if (!rad->prepared)
+		return 0;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
+	if (ret < 0)
+		return ret;
+
+	bl->props.brightness = brightness;
+
+	return brightness & 0xff;
+}
+
+static int rad_bl_update_status(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
+	struct device *dev = &dsi->dev;
+	int ret = 0;
+
+	if (!rad->prepared)
+		return 0;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "New brightness: %d\n", bl->props.brightness);
+
+	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static const struct backlight_ops rad_bl_ops = {
+	.update_status = rad_bl_update_status,
+	.get_brightness = rad_bl_get_brightness,
+};
+
+static const struct drm_panel_funcs rad_panel_funcs = {
+	.prepare = rad_panel_prepare,
+	.unprepare = rad_panel_unprepare,
+	.enable = rad_panel_enable,
+	.disable = rad_panel_disable,
+	.get_modes = rad_panel_get_modes,
+};
+
+/*
+ * The clock might range from 66MHz (30Hz refresh rate)
+ * to 132MHz (60Hz refresh rate)
+ */
+static const struct display_timing rad_default_timing = {
+	.pixelclock = { 66000000, 120000000, 132000000 },
+	.hactive = { 1080, 1080, 1080 },
+	.hfront_porch = { 20, 20, 20 },
+	.hsync_len = { 2, 2, 2 },
+	.hback_porch = { 34, 34, 34 },
+	.vactive = { 1920, 1920, 1920 },
+	.vfront_porch = { 10, 10, 10 },
+	.vsync_len = { 2, 2, 2 },
+	.vback_porch = { 4, 4, 4 },
+	.flags = DISPLAY_FLAGS_HSYNC_LOW |
+		 DISPLAY_FLAGS_VSYNC_LOW |
+		 DISPLAY_FLAGS_DE_LOW |
+		 DISPLAY_FLAGS_PIXDATA_NEGEDGE,
+};
+
+static int rad_panel_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct device_node *np = dev->of_node;
+	struct device_node *timings;
+	struct rad_panel *panel;
+	struct backlight_properties bl_props;
+	int ret;
+
+	panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);
+	if (!panel)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, panel);
+
+	panel->dsi = dsi;
+
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags =  MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
+			   MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+	ret = of_property_read_u32(np, "dsi-lanes", &dsi->lanes);
+	if (ret < 0) {
+		dev_err(dev, "Failed to get dsi-lanes property (%d)\n", ret);
+		return ret;
+	}
+
+	/*
+	 * 'display-timings' is optional, so verify if the node is present
+	 * before calling of_get_videomode so we won't get console error
+	 * messages
+	 */
+	timings = of_get_child_by_name(np, "display-timings");
+	if (timings) {
+		of_node_put(timings);
+		ret = of_get_videomode(np, &panel->vm, 0);
+	} else {
+		videomode_from_timing(&rad_default_timing, &panel->vm);
+	}
+	if (ret < 0)
+		return ret;
+
+	of_property_read_u32(np, "panel-width-mm", &panel->width_mm);
+	of_property_read_u32(np, "panel-height-mm", &panel->height_mm);
+
+	panel->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+
+	if (IS_ERR(panel->reset))
+		panel->reset = NULL;
+	else
+		gpiod_set_value(panel->reset, 0);
+
+
+	memset(&bl_props, 0, sizeof(bl_props));
+	bl_props.type = BACKLIGHT_RAW;
+	bl_props.brightness = 255;
+	bl_props.max_brightness = 255;
+
+	panel->backlight = devm_backlight_device_register(
+				dev, dev_name(dev),
+				dev, dsi,
+				&rad_bl_ops, &bl_props);
+	if (IS_ERR(panel->backlight)) {
+		ret = PTR_ERR(panel->backlight);
+		dev_err(dev, "Failed to register backlight (%d)\n", ret);
+		return ret;
+	}
+
+	drm_panel_init(&panel->base);
+	panel->base.funcs = &rad_panel_funcs;
+	panel->base.dev = dev;
+
+	ret = drm_panel_add(&panel->base);
+
+	if (ret < 0)
+		return ret;
+
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0)
+		drm_panel_remove(&panel->base);
+
+	return ret;
+}
+
+static int rad_panel_remove(struct mipi_dsi_device *dsi)
+{
+	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
+	struct device *dev = &dsi->dev;
+	int ret;
+
+	ret = rad_panel_unprepare(&rad->base);
+	ret |= rad_panel_disable(&rad->base);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "Failed to disable panel (%d)\n", ret);
+
+	ret = mipi_dsi_detach(dsi);
+	if (ret < 0)
+		DRM_DEV_ERROR(dev, "Failed to detach from host (%d)\n",
+			ret);
+
+	drm_panel_detach(&rad->base);
+
+	if (rad->base.dev)
+		drm_panel_remove(&rad->base);
+
+	return 0;
+}
+
+static void rad_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
+
+	rad_panel_unprepare(&rad->base);
+	rad_panel_disable(&rad->base);
+}
+
+static const struct of_device_id rad_of_match[] = {
+	{ .compatible = "raydium,rm67191", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, rad_of_match);
+
+static struct mipi_dsi_driver rad_panel_driver = {
+	.driver = {
+		.name = "panel-raydium-rm67191",
+		.of_match_table = rad_of_match,
+	},
+	.probe = rad_panel_probe,
+	.remove = rad_panel_remove,
+	.shutdown = rad_panel_shutdown,
+};
+module_mipi_dsi_driver(rad_panel_driver);
+
+MODULE_AUTHOR("NXP Semiconductor");
+MODULE_DESCRIPTION("Raydium RM67191");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

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