8 files changed, 1808 insertions, 75 deletions
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index b4e021ea30f9..4894913936e9 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -57,6 +57,15 @@ config DRM_PANEL_BOE_TV101WUM_NL6
 	  Say Y here if you want to support for BOE TV101WUM and AUO KD101N80
 	  45NA WUXGA PANEL DSI Video Mode panel
 
+config DRM_PANEL_DSI_CM
+	tristate "Generic DSI command mode panels"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  DRM panel driver for DSI command mode panels with support for
+	  embedded and external backlights.
+
 config DRM_PANEL_LVDS
 	tristate "Generic LVDS panel driver"
 	depends on OF
@@ -145,6 +154,17 @@ config DRM_PANEL_JDI_LT070ME05000
 	  The panel has a 1200(RGB)×1920 (WUXGA) resolution and uses
 	  24 bit per pixel.
 
+config DRM_PANEL_KHADAS_TS050
+	tristate "Khadas TS050 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 Khadas TS050 TFT-LCD
+	  panel module. The panel has a 1080x1920 resolution and uses
+	  24 bit RGB per pixel. It provides a MIPI DSI interface to
+	  the host, a built-in LED backlight and touch controller.
+
 config DRM_PANEL_KINGDISPLAY_KD097D04
 	tristate "Kingdisplay kd097d04 panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index ebbf488c7eac..cae4d976c069 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -4,6 +4,7 @@ obj-$(CONFIG_DRM_PANEL_ARM_VERSATILE) += panel-arm-versatile.o
 obj-$(CONFIG_DRM_PANEL_ASUS_Z00T_TM5P5_NT35596) += panel-asus-z00t-tm5p5-n35596.o
 obj-$(CONFIG_DRM_PANEL_BOE_HIMAX8279D) += panel-boe-himax8279d.o
 obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_NL6) += panel-boe-tv101wum-nl6.o
+obj-$(CONFIG_DRM_PANEL_DSI_CM) += panel-dsi-cm.o
 obj-$(CONFIG_DRM_PANEL_LVDS) += panel-lvds.o
 obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
 obj-$(CONFIG_DRM_PANEL_ELIDA_KD35T133) += panel-elida-kd35t133.o
@@ -13,6 +14,7 @@ obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
 obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
 obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
+obj-$(CONFIG_DRM_PANEL_KHADAS_TS050) += panel-khadas-ts050.o
 obj-$(CONFIG_DRM_PANEL_KINGDISPLAY_KD097D04) += panel-kingdisplay-kd097d04.o
 obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK050H3146W) += panel-leadtek-ltk050h3146w.o
 obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK500HD1829) += panel-leadtek-ltk500hd1829.o
diff --git a/drivers/gpu/drm/panel/panel-dsi-cm.c b/drivers/gpu/drm/panel/panel-dsi-cm.c
new file mode 100644
index 000000000000..af381d756ac1
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-dsi-cm.c
@@ -0,0 +1,665 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic DSI Command Mode panel driver
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_connector.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+#define DCS_GET_ID1		0xda
+#define DCS_GET_ID2		0xdb
+#define DCS_GET_ID3		0xdc
+
+#define DCS_REGULATOR_SUPPLY_NUM 2
+
+static const struct of_device_id dsicm_of_match[];
+
+struct dsic_panel_data {
+	u32 xres;
+	u32 yres;
+	u32 refresh;
+	u32 width_mm;
+	u32 height_mm;
+	u32 max_hs_rate;
+	u32 max_lp_rate;
+};
+
+struct panel_drv_data {
+	struct mipi_dsi_device *dsi;
+	struct drm_panel panel;
+	struct drm_display_mode mode;
+
+	struct mutex lock;
+
+	struct backlight_device *bldev;
+	struct backlight_device *extbldev;
+
+	unsigned long	hw_guard_end;	/* next value of jiffies when we can
+					 * issue the next sleep in/out command
+					 */
+	unsigned long	hw_guard_wait;	/* max guard time in jiffies */
+
+	const struct dsic_panel_data *panel_data;
+
+	struct gpio_desc *reset_gpio;
+
+	struct regulator_bulk_data supplies[DCS_REGULATOR_SUPPLY_NUM];
+
+	bool use_dsi_backlight;
+
+	/* runtime variables */
+	bool enabled;
+
+	bool intro_printed;
+};
+
+static inline struct panel_drv_data *panel_to_ddata(struct drm_panel *panel)
+{
+	return container_of(panel, struct panel_drv_data, panel);
+}
+
+static void dsicm_bl_power(struct panel_drv_data *ddata, bool enable)
+{
+	struct backlight_device *backlight;
+
+	if (ddata->bldev)
+		backlight = ddata->bldev;
+	else if (ddata->extbldev)
+		backlight = ddata->extbldev;
+	else
+		return;
+
+	if (enable) {
+		backlight->props.fb_blank = FB_BLANK_UNBLANK;
+		backlight->props.state = ~(BL_CORE_FBBLANK | BL_CORE_SUSPENDED);
+		backlight->props.power = FB_BLANK_UNBLANK;
+	} else {
+		backlight->props.fb_blank = FB_BLANK_NORMAL;
+		backlight->props.power = FB_BLANK_POWERDOWN;
+		backlight->props.state |= BL_CORE_FBBLANK | BL_CORE_SUSPENDED;
+	}
+
+	backlight_update_status(backlight);
+}
+
+static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
+{
+	ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
+	ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
+}
+
+static void hw_guard_wait(struct panel_drv_data *ddata)
+{
+	unsigned long wait = ddata->hw_guard_end - jiffies;
+
+	if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(wait);
+	}
+}
+
+static int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data)
+{
+	return mipi_dsi_dcs_read(ddata->dsi, dcs_cmd, data, 1);
+}
+
+static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param)
+{
+	return mipi_dsi_dcs_write(ddata->dsi, dcs_cmd, &param, 1);
+}
+
+static int dsicm_sleep_in(struct panel_drv_data *ddata)
+
+{
+	int r;
+
+	hw_guard_wait(ddata);
+
+	r = mipi_dsi_dcs_enter_sleep_mode(ddata->dsi);
+	if (r)
+		return r;
+
+	hw_guard_start(ddata, 120);
+
+	usleep_range(5000, 10000);
+
+	return 0;
+}
+
+static int dsicm_sleep_out(struct panel_drv_data *ddata)
+{
+	int r;
+
+	hw_guard_wait(ddata);
+
+	r = mipi_dsi_dcs_exit_sleep_mode(ddata->dsi);
+	if (r)
+		return r;
+
+	hw_guard_start(ddata, 120);
+
+	usleep_range(5000, 10000);
+
+	return 0;
+}
+
+static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3)
+{
+	int r;
+
+	r = dsicm_dcs_read_1(ddata, DCS_GET_ID1, id1);
+	if (r)
+		return r;
+	r = dsicm_dcs_read_1(ddata, DCS_GET_ID2, id2);
+	if (r)
+		return r;
+	r = dsicm_dcs_read_1(ddata, DCS_GET_ID3, id3);
+	if (r)
+		return r;
+
+	return 0;
+}
+
+static int dsicm_set_update_window(struct panel_drv_data *ddata)
+{
+	struct mipi_dsi_device *dsi = ddata->dsi;
+	int r;
+
+	r = mipi_dsi_dcs_set_column_address(dsi, 0, ddata->mode.hdisplay - 1);
+	if (r < 0)
+		return r;
+
+	r = mipi_dsi_dcs_set_page_address(dsi, 0, ddata->mode.vdisplay - 1);
+	if (r < 0)
+		return r;
+
+	return 0;
+}
+
+static int dsicm_bl_update_status(struct backlight_device *dev)
+{
+	struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+	int r = 0;
+	int level;
+
+	if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+			dev->props.power == FB_BLANK_UNBLANK)
+		level = dev->props.brightness;
+	else
+		level = 0;
+
+	dev_dbg(&ddata->dsi->dev, "update brightness to %d\n", level);
+
+	mutex_lock(&ddata->lock);
+
+	if (ddata->enabled)
+		r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
+				      level);
+
+	mutex_unlock(&ddata->lock);
+
+	return r;
+}
+
+static int dsicm_bl_get_intensity(struct backlight_device *dev)
+{
+	if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+			dev->props.power == FB_BLANK_UNBLANK)
+		return dev->props.brightness;
+
+	return 0;
+}
+
+static const struct backlight_ops dsicm_bl_ops = {
+	.get_brightness = dsicm_bl_get_intensity,
+	.update_status  = dsicm_bl_update_status,
+};
+
+static ssize_t num_dsi_errors_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct panel_drv_data *ddata = dev_get_drvdata(dev);
+	u8 errors = 0;
+	int r = -ENODEV;
+
+	mutex_lock(&ddata->lock);
+
+	if (ddata->enabled)
+		r = dsicm_dcs_read_1(ddata, MIPI_DCS_GET_ERROR_COUNT_ON_DSI, &errors);
+
+	mutex_unlock(&ddata->lock);
+
+	if (r)
+		return r;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", errors);
+}
+
+static ssize_t hw_revision_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct panel_drv_data *ddata = dev_get_drvdata(dev);
+	u8 id1, id2, id3;
+	int r = -ENODEV;
+
+	mutex_lock(&ddata->lock);
+
+	if (ddata->enabled)
+		r = dsicm_get_id(ddata, &id1, &id2, &id3);
+
+	mutex_unlock(&ddata->lock);
+
+	if (r)
+		return r;
+
+	return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
+}
+
+static DEVICE_ATTR_RO(num_dsi_errors);
+static DEVICE_ATTR_RO(hw_revision);
+
+static struct attribute *dsicm_attrs[] = {
+	&dev_attr_num_dsi_errors.attr,
+	&dev_attr_hw_revision.attr,
+	NULL,
+};
+
+static const struct attribute_group dsicm_attr_group = {
+	.attrs = dsicm_attrs,
+};
+
+static void dsicm_hw_reset(struct panel_drv_data *ddata)
+{
+	gpiod_set_value(ddata->reset_gpio, 1);
+	udelay(10);
+	/* reset the panel */
+	gpiod_set_value(ddata->reset_gpio, 0);
+	/* assert reset */
+	udelay(10);
+	gpiod_set_value(ddata->reset_gpio, 1);
+	/* wait after releasing reset */
+	usleep_range(5000, 10000);
+}
+
+static int dsicm_power_on(struct panel_drv_data *ddata)
+{
+	u8 id1, id2, id3;
+	int r;
+
+	dsicm_hw_reset(ddata);
+
+	ddata->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	r = dsicm_sleep_out(ddata);
+	if (r)
+		goto err;
+
+	r = dsicm_get_id(ddata, &id1, &id2, &id3);
+	if (r)
+		goto err;
+
+	r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0xff);
+	if (r)
+		goto err;
+
+	r = dsicm_dcs_write_1(ddata, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+			(1<<2) | (1<<5));	/* BL | BCTRL */
+	if (r)
+		goto err;
+
+	r = mipi_dsi_dcs_set_pixel_format(ddata->dsi, MIPI_DCS_PIXEL_FMT_24BIT);
+	if (r)
+		goto err;
+
+	r = dsicm_set_update_window(ddata);
+	if (r)
+		goto err;
+
+	r = mipi_dsi_dcs_set_display_on(ddata->dsi);
+	if (r)
+		goto err;
+
+	r = mipi_dsi_dcs_set_tear_on(ddata->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+	if (r)
+		goto err;
+
+	/* possible panel bug */
+	msleep(100);
+
+	ddata->enabled = true;
+
+	if (!ddata->intro_printed) {
+		dev_info(&ddata->dsi->dev, "panel revision %02x.%02x.%02x\n",
+			id1, id2, id3);
+		ddata->intro_printed = true;
+	}
+
+	ddata->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	return 0;
+err:
+	dev_err(&ddata->dsi->dev, "error while enabling panel, issuing HW reset\n");
+
+	dsicm_hw_reset(ddata);
+
+	return r;
+}
+
+static int dsicm_power_off(struct panel_drv_data *ddata)
+{
+	int r;
+
+	ddata->enabled = false;
+
+	r = mipi_dsi_dcs_set_display_off(ddata->dsi);
+	if (!r)
+		r = dsicm_sleep_in(ddata);
+
+	if (r) {
+		dev_err(&ddata->dsi->dev,
+				"error disabling panel, issuing HW reset\n");
+		dsicm_hw_reset(ddata);
+	}
+
+	return r;
+}
+
+static int dsicm_prepare(struct drm_panel *panel)
+{
+	struct panel_drv_data *ddata = panel_to_ddata(panel);
+	int r;
+
+	r = regulator_bulk_enable(ARRAY_SIZE(ddata->supplies), ddata->supplies);
+	if (r)
+		dev_err(&ddata->dsi->dev, "failed to enable supplies: %d\n", r);
+
+	return r;
+}
+
+static int dsicm_enable(struct drm_panel *panel)
+{
+	struct panel_drv_data *ddata = panel_to_ddata(panel);
+	int r;
+
+	mutex_lock(&ddata->lock);
+
+	r = dsicm_power_on(ddata);
+	if (r)
+		goto err;
+
+	mutex_unlock(&ddata->lock);
+
+	dsicm_bl_power(ddata, true);
+
+	return 0;
+err:
+	dev_err(&ddata->dsi->dev, "enable failed (%d)\n", r);
+	mutex_unlock(&ddata->lock);
+	return r;
+}
+
+static int dsicm_unprepare(struct drm_panel *panel)
+{
+	struct panel_drv_data *ddata = panel_to_ddata(panel);
+	int r;
+
+	r = regulator_bulk_disable(ARRAY_SIZE(ddata->supplies), ddata->supplies);
+	if (r)
+		dev_err(&ddata->dsi->dev, "failed to disable supplies: %d\n", r);
+
+	return r;
+}
+
+static int dsicm_disable(struct drm_panel *panel)
+{
+	struct panel_drv_data *ddata = panel_to_ddata(panel);
+	int r;
+
+	dsicm_bl_power(ddata, false);
+
+	mutex_lock(&ddata->lock);
+
+	r = dsicm_power_off(ddata);
+
+	mutex_unlock(&ddata->lock);
+
+	return r;
+}
+
+static int dsicm_get_modes(struct drm_panel *panel,
+			   struct drm_connector *connector)
+{
+	struct panel_drv_data *ddata = panel_to_ddata(panel);
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(connector->dev, &ddata->mode);
+	if (!mode) {
+		dev_err(&ddata->dsi->dev, "failed to add mode %ux%ux@%u kHz\n",
+			ddata->mode.hdisplay, ddata->mode.vdisplay,
+			ddata->mode.clock);
+		return -ENOMEM;
+	}
+
+	connector->display_info.width_mm = ddata->panel_data->width_mm;
+	connector->display_info.height_mm = ddata->panel_data->height_mm;
+
+	drm_mode_probed_add(connector, mode);
+
+	return 1;
+}
+
+static const struct drm_panel_funcs dsicm_panel_funcs = {
+	.unprepare = dsicm_unprepare,
+	.disable = dsicm_disable,
+	.prepare = dsicm_prepare,
+	.enable = dsicm_enable,
+	.get_modes = dsicm_get_modes,
+};
+
+static int dsicm_probe_of(struct mipi_dsi_device *dsi)
+{
+	struct backlight_device *backlight;
+	struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
+	int err;
+	struct drm_display_mode *mode = &ddata->mode;
+
+	ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ddata->reset_gpio)) {
+		err = PTR_ERR(ddata->reset_gpio);
+		dev_err(&dsi->dev, "reset gpio request failed: %d", err);
+		return err;
+	}
+
+	mode->hdisplay = mode->hsync_start = mode->hsync_end = mode->htotal =
+		ddata->panel_data->xres;
+	mode->vdisplay = mode->vsync_start = mode->vsync_end = mode->vtotal =
+		ddata->panel_data->yres;
+	mode->clock = ddata->panel_data->xres * ddata->panel_data->yres *
+		ddata->panel_data->refresh / 1000;
+	mode->width_mm = ddata->panel_data->width_mm;
+	mode->height_mm = ddata->panel_data->height_mm;
+	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+	drm_mode_set_name(mode);
+
+	ddata->supplies[0].supply = "vpnl";
+	ddata->supplies[1].supply = "vddi";
+	err = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ddata->supplies),
+				      ddata->supplies);
+	if (err)
+		return err;
+
+	backlight = devm_of_find_backlight(&dsi->dev);
+	if (IS_ERR(backlight))
+		return PTR_ERR(backlight);
+
+	/* If no backlight device is found assume native backlight support */
+	if (backlight)
+		ddata->extbldev = backlight;
+	else
+		ddata->use_dsi_backlight = true;
+
+	return 0;
+}
+
+static int dsicm_probe(struct mipi_dsi_device *dsi)
+{
+	struct panel_drv_data *ddata;
+	struct backlight_device *bldev = NULL;
+	struct device *dev = &dsi->dev;
+	int r;
+
+	dev_dbg(dev, "probe\n");
+
+	ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
+	if (!ddata)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, ddata);
+	ddata->dsi = dsi;
+
+	ddata->panel_data = of_device_get_match_data(dev);
+	if (!ddata->panel_data)
+		return -ENODEV;
+
+	r = dsicm_probe_of(dsi);
+	if (r)
+		return r;
+
+	mutex_init(&ddata->lock);
+
+	dsicm_hw_reset(ddata);
+
+	drm_panel_init(&ddata->panel, dev, &dsicm_panel_funcs,
+		       DRM_MODE_CONNECTOR_DSI);
+
+	if (ddata->use_dsi_backlight) {
+		struct backlight_properties props = { 0 };
+		props.max_brightness = 255;
+		props.type = BACKLIGHT_RAW;
+
+		bldev = devm_backlight_device_register(dev, dev_name(dev),
+			dev, ddata, &dsicm_bl_ops, &props);
+		if (IS_ERR(bldev)) {
+			r = PTR_ERR(bldev);
+			goto err_bl;
+		}
+
+		ddata->bldev = bldev;
+	}
+
+	r = sysfs_create_group(&dev->kobj, &dsicm_attr_group);
+	if (r) {
+		dev_err(dev, "failed to create sysfs files\n");
+		goto err_bl;
+	}
+
+	dsi->lanes = 2;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |
+			  MIPI_DSI_MODE_EOT_PACKET;
+	dsi->hs_rate = ddata->panel_data->max_hs_rate;
+	dsi->lp_rate = ddata->panel_data->max_lp_rate;
+
+	drm_panel_add(&ddata->panel);
+
+	r = mipi_dsi_attach(dsi);
+	if (r < 0)
+		goto err_dsi_attach;
+
+	return 0;
+
+err_dsi_attach:
+	drm_panel_remove(&ddata->panel);
+	sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group);
+err_bl:
+	if (ddata->extbldev)
+		put_device(&ddata->extbldev->dev);
+
+	return r;
+}
+
+static int dsicm_remove(struct mipi_dsi_device *dsi)
+{
+	struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
+
+	dev_dbg(&dsi->dev, "remove\n");
+
+	mipi_dsi_detach(dsi);
+
+	drm_panel_remove(&ddata->panel);
+
+	sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group);
+
+	if (ddata->extbldev)
+		put_device(&ddata->extbldev->dev);
+
+	return 0;
+}
+
+static const struct dsic_panel_data taal_data = {
+	.xres = 864,
+	.yres = 480,
+	.refresh = 60,
+	.width_mm = 0,
+	.height_mm = 0,
+	.max_hs_rate = 300000000,
+	.max_lp_rate = 10000000,
+};
+
+static const struct dsic_panel_data himalaya_data = {
+	.xres = 480,
+	.yres = 864,
+	.refresh = 60,
+	.width_mm = 49,
+	.height_mm = 88,
+	.max_hs_rate = 300000000,
+	.max_lp_rate = 10000000,
+};
+
+static const struct dsic_panel_data droid4_data = {
+	.xres = 540,
+	.yres = 960,
+	.refresh = 60,
+	.width_mm = 50,
+	.height_mm = 89,
+	.max_hs_rate = 300000000,
+	.max_lp_rate = 10000000,
+};
+
+static const struct of_device_id dsicm_of_match[] = {
+	{ .compatible = "tpo,taal", .data = &taal_data },
+	{ .compatible = "nokia,himalaya", &himalaya_data },
+	{ .compatible = "motorola,droid4-panel", &droid4_data },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, dsicm_of_match);
+
+static struct mipi_dsi_driver dsicm_driver = {
+	.probe = dsicm_probe,
+	.remove = dsicm_remove,
+	.driver = {
+		.name = "panel-dsi-cm",
+		.of_match_table = dsicm_of_match,
+	},
+};
+module_mipi_dsi_driver(dsicm_driver);
+
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
+MODULE_DESCRIPTION("Generic DSI Command Mode Panel Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/panel/panel-khadas-ts050.c b/drivers/gpu/drm/panel/panel-khadas-ts050.c
new file mode 100644
index 000000000000..8f6ac1a40c31
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-khadas-ts050.c
@@ -0,0 +1,870 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <linux/delay.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 <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct khadas_ts050_panel {
+	struct drm_panel base;
+	struct mipi_dsi_device *link;
+
+	struct regulator *supply;
+	struct gpio_desc *reset_gpio;
+	struct gpio_desc *enable_gpio;
+
+	bool prepared;
+	bool enabled;
+};
+
+struct khadas_ts050_panel_cmd {
+	u8 cmd;
+	u8 data;
+};
+
+/* Only the CMD1 User Command set is documented */
+static const struct khadas_ts050_panel_cmd init_code[] = {
+	/* Select Unknown CMD Page (Undocumented) */
+	{0xff, 0xee},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x1f, 0x45},
+	{0x24, 0x4f},
+	{0x38, 0xc8},
+	{0x39, 0x27},
+	{0x1e, 0x77},
+	{0x1d, 0x0f},
+	{0x7e, 0x71},
+	{0x7c, 0x03},
+	{0xff, 0x00},
+	{0xfb, 0x01},
+	{0x35, 0x01},
+	/* Select CMD2 Page0 (Undocumented) */
+	{0xff, 0x01},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x00, 0x01},
+	{0x01, 0x55},
+	{0x02, 0x40},
+	{0x05, 0x40},
+	{0x06, 0x4a},
+	{0x07, 0x24},
+	{0x08, 0x0c},
+	{0x0b, 0x7d},
+	{0x0c, 0x7d},
+	{0x0e, 0xb0},
+	{0x0f, 0xae},
+	{0x11, 0x10},
+	{0x12, 0x10},
+	{0x13, 0x03},
+	{0x14, 0x4a},
+	{0x15, 0x12},
+	{0x16, 0x12},
+	{0x18, 0x00},
+	{0x19, 0x77},
+	{0x1a, 0x55},
+	{0x1b, 0x13},
+	{0x1c, 0x00},
+	{0x1d, 0x00},
+	{0x1e, 0x13},
+	{0x1f, 0x00},
+	{0x23, 0x00},
+	{0x24, 0x00},
+	{0x25, 0x00},
+	{0x26, 0x00},
+	{0x27, 0x00},
+	{0x28, 0x00},
+	{0x35, 0x00},
+	{0x66, 0x00},
+	{0x58, 0x82},
+	{0x59, 0x02},
+	{0x5a, 0x02},
+	{0x5b, 0x02},
+	{0x5c, 0x82},
+	{0x5d, 0x82},
+	{0x5e, 0x02},
+	{0x5f, 0x02},
+	{0x72, 0x31},
+	/* Select CMD2 Page4 (Undocumented) */
+	{0xff, 0x05},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x00, 0x01},
+	{0x01, 0x0b},
+	{0x02, 0x0c},
+	{0x03, 0x09},
+	{0x04, 0x0a},
+	{0x05, 0x00},
+	{0x06, 0x0f},
+	{0x07, 0x10},
+	{0x08, 0x00},
+	{0x09, 0x00},
+	{0x0a, 0x00},
+	{0x0b, 0x00},
+	{0x0c, 0x00},
+	{0x0d, 0x13},
+	{0x0e, 0x15},
+	{0x0f, 0x17},
+	{0x10, 0x01},
+	{0x11, 0x0b},
+	{0x12, 0x0c},
+	{0x13, 0x09},
+	{0x14, 0x0a},
+	{0x15, 0x00},
+	{0x16, 0x0f},
+	{0x17, 0x10},
+	{0x18, 0x00},
+	{0x19, 0x00},
+	{0x1a, 0x00},
+	{0x1b, 0x00},
+	{0x1c, 0x00},
+	{0x1d, 0x13},
+	{0x1e, 0x15},
+	{0x1f, 0x17},
+	{0x20, 0x00},
+	{0x21, 0x03},
+	{0x22, 0x01},
+	{0x23, 0x40},
+	{0x24, 0x40},
+	{0x25, 0xed},
+	{0x29, 0x58},
+	{0x2a, 0x12},
+	{0x2b, 0x01},
+	{0x4b, 0x06},
+	{0x4c, 0x11},
+	{0x4d, 0x20},
+	{0x4e, 0x02},
+	{0x4f, 0x02},
+	{0x50, 0x20},
+	{0x51, 0x61},
+	{0x52, 0x01},
+	{0x53, 0x63},
+	{0x54, 0x77},
+	{0x55, 0xed},
+	{0x5b, 0x00},
+	{0x5c, 0x00},
+	{0x5d, 0x00},
+	{0x5e, 0x00},
+	{0x5f, 0x15},
+	{0x60, 0x75},
+	{0x61, 0x00},
+	{0x62, 0x00},
+	{0x63, 0x00},
+	{0x64, 0x00},
+	{0x65, 0x00},
+	{0x66, 0x00},
+	{0x67, 0x00},
+	{0x68, 0x04},
+	{0x69, 0x00},
+	{0x6a, 0x00},
+	{0x6c, 0x40},
+	{0x75, 0x01},
+	{0x76, 0x01},
+	{0x7a, 0x80},
+	{0x7b, 0xa3},
+	{0x7c, 0xd8},
+	{0x7d, 0x60},
+	{0x7f, 0x15},
+	{0x80, 0x81},
+	{0x83, 0x05},
+	{0x93, 0x08},
+	{0x94, 0x10},
+	{0x8a, 0x00},
+	{0x9b, 0x0f},
+	{0xea, 0xff},
+	{0xec, 0x00},
+	/* Select CMD2 Page0 (Undocumented) */
+	{0xff, 0x01},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x75, 0x00},
+	{0x76, 0xdf},
+	{0x77, 0x00},
+	{0x78, 0xe4},
+	{0x79, 0x00},
+	{0x7a, 0xed},
+	{0x7b, 0x00},
+	{0x7c, 0xf6},
+	{0x7d, 0x00},
+	{0x7e, 0xff},
+	{0x7f, 0x01},
+	{0x80, 0x07},
+	{0x81, 0x01},
+	{0x82, 0x10},
+	{0x83, 0x01},
+	{0x84, 0x18},
+	{0x85, 0x01},
+	{0x86, 0x20},
+	{0x87, 0x01},
+	{0x88, 0x3d},
+	{0x89, 0x01},
+	{0x8a, 0x56},
+	{0x8b, 0x01},
+	{0x8c, 0x84},
+	{0x8d, 0x01},
+	{0x8e, 0xab},
+	{0x8f, 0x01},
+	{0x90, 0xec},
+	{0x91, 0x02},
+	{0x92, 0x22},
+	{0x93, 0x02},
+	{0x94, 0x23},
+	{0x95, 0x02},
+	{0x96, 0x55},
+	{0x97, 0x02},
+	{0x98, 0x8b},
+	{0x99, 0x02},
+	{0x9a, 0xaf},
+	{0x9b, 0x02},
+	{0x9c, 0xdf},
+	{0x9d, 0x03},
+	{0x9e, 0x01},
+	{0x9f, 0x03},
+	{0xa0, 0x2c},
+	{0xa2, 0x03},
+	{0xa3, 0x39},
+	{0xa4, 0x03},
+	{0xa5, 0x47},
+	{0xa6, 0x03},
+	{0xa7, 0x56},
+	{0xa9, 0x03},
+	{0xaa, 0x66},
+	{0xab, 0x03},
+	{0xac, 0x76},
+	{0xad, 0x03},
+	{0xae, 0x85},
+	{0xaf, 0x03},
+	{0xb0, 0x90},
+	{0xb1, 0x03},
+	{0xb2, 0xcb},
+	{0xb3, 0x00},
+	{0xb4, 0xdf},
+	{0xb5, 0x00},
+	{0xb6, 0xe4},
+	{0xb7, 0x00},
+	{0xb8, 0xed},
+	{0xb9, 0x00},
+	{0xba, 0xf6},
+	{0xbb, 0x00},
+	{0xbc, 0xff},
+	{0xbd, 0x01},
+	{0xbe, 0x07},
+	{0xbf, 0x01},
+	{0xc0, 0x10},
+	{0xc1, 0x01},
+	{0xc2, 0x18},
+	{0xc3, 0x01},
+	{0xc4, 0x20},
+	{0xc5, 0x01},
+	{0xc6, 0x3d},
+	{0xc7, 0x01},
+	{0xc8, 0x56},
+	{0xc9, 0x01},
+	{0xca, 0x84},
+	{0xcb, 0x01},
+	{0xcc, 0xab},
+	{0xcd, 0x01},
+	{0xce, 0xec},
+	{0xcf, 0x02},
+	{0xd0, 0x22},
+	{0xd1, 0x02},
+	{0xd2, 0x23},
+	{0xd3, 0x02},
+	{0xd4, 0x55},
+	{0xd5, 0x02},
+	{0xd6, 0x8b},
+	{0xd7, 0x02},
+	{0xd8, 0xaf},
+	{0xd9, 0x02},
+	{0xda, 0xdf},
+	{0xdb, 0x03},
+	{0xdc, 0x01},
+	{0xdd, 0x03},
+	{0xde, 0x2c},
+	{0xdf, 0x03},
+	{0xe0, 0x39},
+	{0xe1, 0x03},
+	{0xe2, 0x47},
+	{0xe3, 0x03},
+	{0xe4, 0x56},
+	{0xe5, 0x03},
+	{0xe6, 0x66},
+	{0xe7, 0x03},
+	{0xe8, 0x76},
+	{0xe9, 0x03},
+	{0xea, 0x85},
+	{0xeb, 0x03},
+	{0xec, 0x90},
+	{0xed, 0x03},
+	{0xee, 0xcb},
+	{0xef, 0x00},
+	{0xf0, 0xbb},
+	{0xf1, 0x00},
+	{0xf2, 0xc0},
+	{0xf3, 0x00},
+	{0xf4, 0xcc},
+	{0xf5, 0x00},
+	{0xf6, 0xd6},
+	{0xf7, 0x00},
+	{0xf8, 0xe1},
+	{0xf9, 0x00},
+	{0xfa, 0xea},
+	/* Select CMD2 Page2 (Undocumented) */
+	{0xff, 0x02},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x00, 0x00},
+	{0x01, 0xf4},
+	{0x02, 0x00},
+	{0x03, 0xef},
+	{0x04, 0x01},
+	{0x05, 0x07},
+	{0x06, 0x01},
+	{0x07, 0x28},
+	{0x08, 0x01},
+	{0x09, 0x44},
+	{0x0a, 0x01},
+	{0x0b, 0x76},
+	{0x0c, 0x01},
+	{0x0d, 0xa0},
+	{0x0e, 0x01},
+	{0x0f, 0xe7},
+	{0x10, 0x02},
+	{0x11, 0x1f},
+	{0x12, 0x02},
+	{0x13, 0x22},
+	{0x14, 0x02},
+	{0x15, 0x54},
+	{0x16, 0x02},
+	{0x17, 0x8b},
+	{0x18, 0x02},
+	{0x19, 0xaf},
+	{0x1a, 0x02},
+	{0x1b, 0xe0},
+	{0x1c, 0x03},
+	{0x1d, 0x01},
+	{0x1e, 0x03},
+	{0x1f, 0x2d},
+	{0x20, 0x03},
+	{0x21, 0x39},
+	{0x22, 0x03},
+	{0x23, 0x47},
+	{0x24, 0x03},
+	{0x25, 0x57},
+	{0x26, 0x03},
+	{0x27, 0x65},
+	{0x28, 0x03},
+	{0x29, 0x77},
+	{0x2a, 0x03},
+	{0x2b, 0x85},
+	{0x2d, 0x03},
+	{0x2f, 0x8f},
+	{0x30, 0x03},
+	{0x31, 0xcb},
+	{0x32, 0x00},
+	{0x33, 0xbb},
+	{0x34, 0x00},
+	{0x35, 0xc0},
+	{0x36, 0x00},
+	{0x37, 0xcc},
+	{0x38, 0x00},
+	{0x39, 0xd6},
+	{0x3a, 0x00},
+	{0x3b, 0xe1},
+	{0x3d, 0x00},
+	{0x3f, 0xea},
+	{0x40, 0x00},
+	{0x41, 0xf4},
+	{0x42, 0x00},
+	{0x43, 0xfe},
+	{0x44, 0x01},
+	{0x45, 0x07},
+	{0x46, 0x01},
+	{0x47, 0x28},
+	{0x48, 0x01},
+	{0x49, 0x44},
+	{0x4a, 0x01},
+	{0x4b, 0x76},
+	{0x4c, 0x01},
+	{0x4d, 0xa0},
+	{0x4e, 0x01},
+	{0x4f, 0xe7},
+	{0x50, 0x02},
+	{0x51, 0x1f},
+	{0x52, 0x02},
+	{0x53, 0x22},
+	{0x54, 0x02},
+	{0x55, 0x54},
+	{0x56, 0x02},
+	{0x58, 0x8b},
+	{0x59, 0x02},
+	{0x5a, 0xaf},
+	{0x5b, 0x02},
+	{0x5c, 0xe0},
+	{0x5d, 0x03},
+	{0x5e, 0x01},
+	{0x5f, 0x03},
+	{0x60, 0x2d},
+	{0x61, 0x03},
+	{0x62, 0x39},
+	{0x63, 0x03},
+	{0x64, 0x47},
+	{0x65, 0x03},
+	{0x66, 0x57},
+	{0x67, 0x03},
+	{0x68, 0x65},
+	{0x69, 0x03},
+	{0x6a, 0x77},
+	{0x6b, 0x03},
+	{0x6c, 0x85},
+	{0x6d, 0x03},
+	{0x6e, 0x8f},
+	{0x6f, 0x03},
+	{0x70, 0xcb},
+	{0x71, 0x00},
+	{0x72, 0x00},
+	{0x73, 0x00},
+	{0x74, 0x21},
+	{0x75, 0x00},
+	{0x76, 0x4c},
+	{0x77, 0x00},
+	{0x78, 0x6b},
+	{0x79, 0x00},
+	{0x7a, 0x85},
+	{0x7b, 0x00},
+	{0x7c, 0x9a},
+	{0x7d, 0x00},
+	{0x7e, 0xad},
+	{0x7f, 0x00},
+	{0x80, 0xbe},
+	{0x81, 0x00},
+	{0x82, 0xcd},
+	{0x83, 0x01},
+	{0x84, 0x01},
+	{0x85, 0x01},
+	{0x86, 0x29},
+	{0x87, 0x01},
+	{0x88, 0x68},
+	{0x89, 0x01},
+	{0x8a, 0x98},
+	{0x8b, 0x01},
+	{0x8c, 0xe5},
+	{0x8d, 0x02},
+	{0x8e, 0x1e},
+	{0x8f, 0x02},
+	{0x90, 0x30},
+	{0x91, 0x02},
+	{0x92, 0x52},
+	{0x93, 0x02},
+	{0x94, 0x88},
+	{0x95, 0x02},
+	{0x96, 0xaa},
+	{0x97, 0x02},
+	{0x98, 0xd7},
+	{0x99, 0x02},
+	{0x9a, 0xf7},
+	{0x9b, 0x03},
+	{0x9c, 0x21},
+	{0x9d, 0x03},
+	{0x9e, 0x2e},
+	{0x9f, 0x03},
+	{0xa0, 0x3d},
+	{0xa2, 0x03},
+	{0xa3, 0x4c},
+	{0xa4, 0x03},
+	{0xa5, 0x5e},
+	{0xa6, 0x03},
+	{0xa7, 0x71},
+	{0xa9, 0x03},
+	{0xaa, 0x86},
+	{0xab, 0x03},
+	{0xac, 0x94},
+	{0xad, 0x03},
+	{0xae, 0xfa},
+	{0xaf, 0x00},
+	{0xb0, 0x00},
+	{0xb1, 0x00},
+	{0xb2, 0x21},
+	{0xb3, 0x00},
+	{0xb4, 0x4c},
+	{0xb5, 0x00},
+	{0xb6, 0x6b},
+	{0xb7, 0x00},
+	{0xb8, 0x85},
+	{0xb9, 0x00},
+	{0xba, 0x9a},
+	{0xbb, 0x00},
+	{0xbc, 0xad},
+	{0xbd, 0x00},
+	{0xbe, 0xbe},
+	{0xbf, 0x00},
+	{0xc0, 0xcd},
+	{0xc1, 0x01},
+	{0xc2, 0x01},
+	{0xc3, 0x01},
+	{0xc4, 0x29},
+	{0xc5, 0x01},
+	{0xc6, 0x68},
+	{0xc7, 0x01},
+	{0xc8, 0x98},
+	{0xc9, 0x01},
+	{0xca, 0xe5},
+	{0xcb, 0x02},
+	{0xcc, 0x1e},
+	{0xcd, 0x02},
+	{0xce, 0x20},
+	{0xcf, 0x02},
+	{0xd0, 0x52},
+	{0xd1, 0x02},
+	{0xd2, 0x88},
+	{0xd3, 0x02},
+	{0xd4, 0xaa},
+	{0xd5, 0x02},
+	{0xd6, 0xd7},
+	{0xd7, 0x02},
+	{0xd8, 0xf7},
+	{0xd9, 0x03},
+	{0xda, 0x21},
+	{0xdb, 0x03},
+	{0xdc, 0x2e},
+	{0xdd, 0x03},
+	{0xde, 0x3d},
+	{0xdf, 0x03},
+	{0xe0, 0x4c},
+	{0xe1, 0x03},
+	{0xe2, 0x5e},
+	{0xe3, 0x03},
+	{0xe4, 0x71},
+	{0xe5, 0x03},
+	{0xe6, 0x86},
+	{0xe7, 0x03},
+	{0xe8, 0x94},
+	{0xe9, 0x03},
+	{0xea, 0xfa},
+	/* Select CMD2 Page0 (Undocumented) */
+	{0xff, 0x01},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	/* Select CMD2 Page1 (Undocumented) */
+	{0xff, 0x02},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	/* Select CMD2 Page3 (Undocumented) */
+	{0xff, 0x04},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	/* Select CMD1 */
+	{0xff, 0x00},
+	{0xd3, 0x05}, /* RGBMIPICTRL: VSYNC back porch = 5 */
+	{0xd4, 0x04}, /* RGBMIPICTRL: VSYNC front porch = 4 */
+};
+
+static inline
+struct khadas_ts050_panel *to_khadas_ts050_panel(struct drm_panel *panel)
+{
+	return container_of(panel, struct khadas_ts050_panel, base);
+}
+
+static int khadas_ts050_panel_prepare(struct drm_panel *panel)
+{
+	struct khadas_ts050_panel *khadas_ts050 = to_khadas_ts050_panel(panel);
+	unsigned int i;
+	int err;
+
+	if (khadas_ts050->prepared)
+		return 0;
+
+	gpiod_set_value_cansleep(khadas_ts050->enable_gpio, 0);
+
+	err = regulator_enable(khadas_ts050->supply);
+	if (err < 0)
+		return err;
+
+	gpiod_set_value_cansleep(khadas_ts050->enable_gpio, 1);
+
+	msleep(60);
+
+	gpiod_set_value_cansleep(khadas_ts050->reset_gpio, 1);
+
+	usleep_range(10000, 11000);
+
+	gpiod_set_value_cansleep(khadas_ts050->reset_gpio, 0);
+
+	/* Select CMD2 page 4 (Undocumented) */
+	mipi_dsi_dcs_write(khadas_ts050->link, 0xff, (u8[]){ 0x05 }, 1);
+
+	/* Reload CMD1: Don't reload default value to register */
+	mipi_dsi_dcs_write(khadas_ts050->link, 0xfb, (u8[]){ 0x01 }, 1);
+
+	mipi_dsi_dcs_write(khadas_ts050->link, 0xc5, (u8[]){ 0x01 }, 1);
+
+	msleep(100);
+
+	for (i = 0; i < ARRAY_SIZE(init_code); i++) {
+		err = mipi_dsi_dcs_write(khadas_ts050->link,
+					 init_code[i].cmd,
+					 &init_code[i].data, 1);
+		if (err < 0) {
+			dev_err(panel->dev, "failed write cmds: %d\n", err);
+			goto poweroff;
+		}
+	}
+
+	err = mipi_dsi_dcs_exit_sleep_mode(khadas_ts050->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
+		goto poweroff;
+	}
+
+	msleep(120);
+
+	/* Select CMD1 */
+	mipi_dsi_dcs_write(khadas_ts050->link, 0xff, (u8[]){ 0x00 }, 1);
+
+	err = mipi_dsi_dcs_set_tear_on(khadas_ts050->link,
+				       MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to set tear on: %d\n", err);
+		goto poweroff;
+	}
+
+	err = mipi_dsi_dcs_set_display_on(khadas_ts050->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to set display on: %d\n", err);
+		goto poweroff;
+	}
+
+	usleep_range(10000, 11000);
+
+	khadas_ts050->prepared = true;
+
+	return 0;
+
+poweroff:
+	gpiod_set_value_cansleep(khadas_ts050->enable_gpio, 0);
+	gpiod_set_value_cansleep(khadas_ts050->reset_gpio, 1);
+
+	regulator_disable(khadas_ts050->supply);
+
+	return err;
+}
+
+static int khadas_ts050_panel_unprepare(struct drm_panel *panel)
+{
+	struct khadas_ts050_panel *khadas_ts050 = to_khadas_ts050_panel(panel);
+	int err;
+
+	if (!khadas_ts050->prepared)
+		return 0;
+
+	khadas_ts050->prepared = false;
+
+	err = mipi_dsi_dcs_enter_sleep_mode(khadas_ts050->link);
+	if (err < 0)
+		dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
+
+	msleep(150);
+
+	gpiod_set_value_cansleep(khadas_ts050->enable_gpio, 0);
+	gpiod_set_value_cansleep(khadas_ts050->reset_gpio, 1);
+
+	err = regulator_disable(khadas_ts050->supply);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static int khadas_ts050_panel_enable(struct drm_panel *panel)
+{
+	struct khadas_ts050_panel *khadas_ts050 = to_khadas_ts050_panel(panel);
+
+	khadas_ts050->enabled = true;
+
+	return 0;
+}
+
+static int khadas_ts050_panel_disable(struct drm_panel *panel)
+{
+	struct khadas_ts050_panel *khadas_ts050 = to_khadas_ts050_panel(panel);
+	int err;
+
+	if (!khadas_ts050->enabled)
+		return 0;
+
+	err = mipi_dsi_dcs_set_display_off(khadas_ts050->link);
+	if (err < 0)
+		dev_err(panel->dev, "failed to set display off: %d\n", err);
+
+	usleep_range(10000, 11000);
+
+	khadas_ts050->enabled = false;
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.clock = 120000,
+	.hdisplay = 1088,
+	.hsync_start = 1088 + 104,
+	.hsync_end = 1088 + 104 + 4,
+	.htotal = 1088 + 104 + 4 + 127,
+	.vdisplay = 1920,
+	.vsync_start = 1920 + 4,
+	.vsync_end = 1920 + 4 + 2,
+	.vtotal = 1920 + 4 + 2 + 3,
+	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+};
+
+static int khadas_ts050_panel_get_modes(struct drm_panel *panel,
+					struct drm_connector *connector)
+{
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(connector->dev, &default_mode);
+	if (!mode) {
+		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
+			default_mode.hdisplay, default_mode.vdisplay,
+			drm_mode_vrefresh(&default_mode));
+		return -ENOMEM;
+	}
+
+	drm_mode_set_name(mode);
+
+	drm_mode_probed_add(connector, mode);
+
+	connector->display_info.width_mm = 64;
+	connector->display_info.height_mm = 118;
+	connector->display_info.bpc = 8;
+
+	return 1;
+}
+
+static const struct drm_panel_funcs khadas_ts050_panel_funcs = {
+	.prepare = khadas_ts050_panel_prepare,
+	.unprepare = khadas_ts050_panel_unprepare,
+	.enable = khadas_ts050_panel_enable,
+	.disable = khadas_ts050_panel_disable,
+	.get_modes = khadas_ts050_panel_get_modes,
+};
+
+static const struct of_device_id khadas_ts050_of_match[] = {
+	{ .compatible = "khadas,ts050", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, khadas_ts050_of_match);
+
+static int khadas_ts050_panel_add(struct khadas_ts050_panel *khadas_ts050)
+{
+	struct device *dev = &khadas_ts050->link->dev;
+	int err;
+
+	khadas_ts050->supply = devm_regulator_get(dev, "power");
+	if (IS_ERR(khadas_ts050->supply))
+		return dev_err_probe(dev, PTR_ERR(khadas_ts050->supply),
+				     "failed to get power supply");
+
+	khadas_ts050->reset_gpio = devm_gpiod_get(dev, "reset",
+						  GPIOD_OUT_LOW);
+	if (IS_ERR(khadas_ts050->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(khadas_ts050->reset_gpio),
+				     "failed to get reset gpio");
+
+	khadas_ts050->enable_gpio = devm_gpiod_get(dev, "enable",
+						   GPIOD_OUT_HIGH);
+	if (IS_ERR(khadas_ts050->enable_gpio))
+		return dev_err_probe(dev, PTR_ERR(khadas_ts050->enable_gpio),
+				     "failed to get enable gpio");
+
+	drm_panel_init(&khadas_ts050->base, &khadas_ts050->link->dev,
+		       &khadas_ts050_panel_funcs, DRM_MODE_CONNECTOR_DSI);
+
+	err = drm_panel_of_backlight(&khadas_ts050->base);
+	if (err)
+		return err;
+
+	drm_panel_add(&khadas_ts050->base);
+
+	return 0;
+}
+
+static int khadas_ts050_panel_probe(struct mipi_dsi_device *dsi)
+{
+	struct khadas_ts050_panel *khadas_ts050;
+	int err;
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+			  MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET;
+
+	khadas_ts050 = devm_kzalloc(&dsi->dev, sizeof(*khadas_ts050),
+				    GFP_KERNEL);
+	if (!khadas_ts050)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, khadas_ts050);
+	khadas_ts050->link = dsi;
+
+	err = khadas_ts050_panel_add(khadas_ts050);
+	if (err < 0)
+		return err;
+
+	err = mipi_dsi_attach(dsi);
+	if (err)
+		drm_panel_remove(&khadas_ts050->base);
+
+	return err;
+}
+
+static int khadas_ts050_panel_remove(struct mipi_dsi_device *dsi)
+{
+	struct khadas_ts050_panel *khadas_ts050 = mipi_dsi_get_drvdata(dsi);
+	int err;
+
+	err = mipi_dsi_detach(dsi);
+	if (err < 0)
+		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
+
+	drm_panel_remove(&khadas_ts050->base);
+	drm_panel_disable(&khadas_ts050->base);
+	drm_panel_unprepare(&khadas_ts050->base);
+
+	return 0;
+}
+
+static void khadas_ts050_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+	struct khadas_ts050_panel *khadas_ts050 = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_disable(&khadas_ts050->base);
+	drm_panel_unprepare(&khadas_ts050->base);
+}
+
+static struct mipi_dsi_driver khadas_ts050_panel_driver = {
+	.driver = {
+		.name = "panel-khadas-ts050",
+		.of_match_table = khadas_ts050_of_match,
+	},
+	.probe = khadas_ts050_panel_probe,
+	.remove = khadas_ts050_panel_remove,
+	.shutdown = khadas_ts050_panel_shutdown,
+};
+module_mipi_dsi_driver(khadas_ts050_panel_driver);
+
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
+MODULE_DESCRIPTION("Khadas TS050 panel driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
index 0c5f22e95c2d..30f28ad4df6b 100644
--- a/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
+++ b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
@@ -9,6 +9,7 @@
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/mipi_display.h>
@@ -22,6 +23,7 @@
 /* Manufacturer specific Commands send via DSI */
 #define MANTIX_CMD_OTP_STOP_RELOAD_MIPI 0x41
 #define MANTIX_CMD_INT_CANCEL           0x4C
+#define MANTIX_CMD_SPI_FINISH           0x90
 
 struct mantix {
 	struct device *dev;
@@ -33,6 +35,8 @@ struct mantix {
 	struct regulator *avdd;
 	struct regulator *avee;
 	struct regulator *vddi;
+
+	const struct drm_display_mode *default_mode;
 };
 
 static inline struct mantix *panel_to_mantix(struct drm_panel *panel)
@@ -66,6 +70,10 @@ static int mantix_init_sequence(struct mantix *ctx)
 	dsi_generic_write_seq(dsi, 0x80, 0x64, 0x00, 0x64, 0x00, 0x00);
 	msleep(20);
 
+	dsi_generic_write_seq(dsi, MANTIX_CMD_SPI_FINISH, 0xA5);
+	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x00, 0x2F);
+	msleep(20);
+
 	dev_dbg(dev, "Panel init sequence done\n");
 	return 0;
 }
@@ -182,7 +190,7 @@ static int mantix_prepare(struct drm_panel *panel)
 	return 0;
 }
 
-static const struct drm_display_mode default_mode = {
+static const struct drm_display_mode default_mode_mantix = {
 	.hdisplay    = 720,
 	.hsync_start = 720 + 45,
 	.hsync_end   = 720 + 45 + 14,
@@ -197,17 +205,32 @@ static const struct drm_display_mode default_mode = {
 	.height_mm   = 130,
 };
 
+static const struct drm_display_mode default_mode_ys = {
+	.hdisplay    = 720,
+	.hsync_start = 720 + 45,
+	.hsync_end   = 720 + 45 + 14,
+	.htotal	     = 720 + 45 + 14 + 25,
+	.vdisplay    = 1440,
+	.vsync_start = 1440 + 175,
+	.vsync_end   = 1440 + 175 + 8,
+	.vtotal	     = 1440 + 175 + 8 + 50,
+	.clock	     = 85298,
+	.flags	     = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+	.width_mm    = 65,
+	.height_mm   = 130,
+};
+
 static int mantix_get_modes(struct drm_panel *panel,
 			    struct drm_connector *connector)
 {
 	struct mantix *ctx = panel_to_mantix(panel);
 	struct drm_display_mode *mode;
 
-	mode = drm_mode_duplicate(connector->dev, &default_mode);
+	mode = drm_mode_duplicate(connector->dev, ctx->default_mode);
 	if (!mode) {
 		dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
-			default_mode.hdisplay, default_mode.vdisplay,
-			drm_mode_vrefresh(&default_mode));
+			ctx->default_mode->hdisplay, ctx->default_mode->vdisplay,
+			drm_mode_vrefresh(ctx->default_mode));
 		return -ENOMEM;
 	}
 
@@ -238,6 +261,7 @@ static int mantix_probe(struct mipi_dsi_device *dsi)
 	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
 		return -ENOMEM;
+	ctx->default_mode = of_device_get_match_data(dev);
 
 	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(ctx->reset_gpio)) {
@@ -288,8 +312,8 @@ static int mantix_probe(struct mipi_dsi_device *dsi)
 	}
 
 	dev_info(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
-		 default_mode.hdisplay, default_mode.vdisplay,
-		 drm_mode_vrefresh(&default_mode),
+		 ctx->default_mode->hdisplay, ctx->default_mode->vdisplay,
+		 drm_mode_vrefresh(ctx->default_mode),
 		 mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);
 
 	return 0;
@@ -316,7 +340,8 @@ static int mantix_remove(struct mipi_dsi_device *dsi)
 }
 
 static const struct of_device_id mantix_of_match[] = {
-	{ .compatible = "mantix,mlaf057we51-x" },
+	{ .compatible = "mantix,mlaf057we51-x", .data = &default_mode_mantix },
+	{ .compatible = "ys,ys57pss36bh5gq", .data = &default_mode_ys },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, mantix_of_match);
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
index 6b4e97bfd46e..bf6d704d4d27 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
@@ -25,6 +25,14 @@
 /* Manufacturer Command Set */
 #define MCS_ELVSS_ON		0xb1
 #define MCS_TEMP_SWIRE		0xb2
+#define MCS_PENTILE_1		0xb3
+#define MCS_PENTILE_2		0xb4
+#define MCS_GAMMA_DELTA_Y_RED	0xb5
+#define MCS_GAMMA_DELTA_X_RED	0xb6
+#define MCS_GAMMA_DELTA_Y_GREEN	0xb7
+#define MCS_GAMMA_DELTA_X_GREEN	0xb8
+#define MCS_GAMMA_DELTA_Y_BLUE	0xb9
+#define MCS_GAMMA_DELTA_X_BLUE	0xba
 #define MCS_MIECTL1		0xc0
 #define MCS_BCMODE		0xc1
 #define MCS_ERROR_CHECK		0xd5
@@ -281,6 +289,7 @@ struct s6e63m0 {
 	struct backlight_device *bl_dev;
 	u8 lcd_type;
 	u8 elvss_pulse;
+	bool dsi_mode;
 
 	struct regulator_bulk_data supplies[2];
 	struct gpio_desc *reset_gpio;
@@ -395,9 +404,21 @@ static int s6e63m0_check_lcd_type(struct s6e63m0 *ctx)
 
 static void s6e63m0_init(struct s6e63m0 *ctx)
 {
-	s6e63m0_dcs_write_seq_static(ctx, MCS_PANELCTL,
-				     0x01, 0x27, 0x27, 0x07, 0x07, 0x54, 0x9f,
-				     0x63, 0x8f, 0x1a, 0x33, 0x0d, 0x00, 0x00);
+	/*
+	 * We do not know why there is a difference in the DSI mode.
+	 * (No datasheet.)
+	 *
+	 * In the vendor driver this sequence is called
+	 * "SEQ_PANEL_CONDITION_SET" or "DCS_CMD_SEQ_PANEL_COND_SET".
+	 */
+	if (ctx->dsi_mode)
+		s6e63m0_dcs_write_seq_static(ctx, MCS_PANELCTL,
+					     0x01, 0x2c, 0x2c, 0x07, 0x07, 0x5f, 0xb3,
+					     0x6d, 0x97, 0x1d, 0x3a, 0x0f, 0x00, 0x00);
+	else
+		s6e63m0_dcs_write_seq_static(ctx, MCS_PANELCTL,
+					     0x01, 0x27, 0x27, 0x07, 0x07, 0x54, 0x9f,
+					     0x63, 0x8f, 0x1a, 0x33, 0x0d, 0x00, 0x00);
 
 	s6e63m0_dcs_write_seq_static(ctx, MCS_DISCTL,
 				     0x02, 0x03, 0x1c, 0x10, 0x10);
@@ -414,40 +435,40 @@ static void s6e63m0_init(struct s6e63m0 *ctx)
 
 	s6e63m0_dcs_write_seq_static(ctx, MCS_SRCCTL,
 				     0x00, 0x8e, 0x07);
-	s6e63m0_dcs_write_seq_static(ctx, 0xb3, 0x6c);
+	s6e63m0_dcs_write_seq_static(ctx, MCS_PENTILE_1, 0x6c);
 
-	s6e63m0_dcs_write_seq_static(ctx, 0xb5,
+	s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_Y_RED,
 				     0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17,
 				     0x13, 0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b,
 				     0x1a, 0x17, 0x2b, 0x26, 0x22, 0x20, 0x3a,
 				     0x34, 0x30, 0x2c, 0x29, 0x26, 0x25, 0x23,
 				     0x21, 0x20, 0x1e, 0x1e);
 
-	s6e63m0_dcs_write_seq_static(ctx, 0xb6,
+	s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_X_RED,
 				     0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44,
 				     0x44, 0x55, 0x55, 0x66, 0x66, 0x66, 0x66,
 				     0x66, 0x66);
 
-	s6e63m0_dcs_write_seq_static(ctx, 0xb7,
+	s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_Y_GREEN,
 				     0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17,
 				     0x13, 0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b,
 				     0x1a, 0x17, 0x2b, 0x26, 0x22, 0x20, 0x3a,
 				     0x34, 0x30, 0x2c, 0x29, 0x26, 0x25, 0x23,
 				     0x21, 0x20, 0x1e, 0x1e);
 
-	s6e63m0_dcs_write_seq_static(ctx, 0xb8,
+	s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_X_GREEN,
 				     0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44,
 				     0x44, 0x55, 0x55, 0x66, 0x66, 0x66, 0x66,
 				     0x66, 0x66);
 
-	s6e63m0_dcs_write_seq_static(ctx, 0xb9,
+	s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_Y_BLUE,
 				     0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17,
 				     0x13, 0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b,
 				     0x1a, 0x17, 0x2b, 0x26, 0x22, 0x20, 0x3a,
 				     0x34, 0x30, 0x2c, 0x29, 0x26, 0x25, 0x23,
 				     0x21, 0x20, 0x1e, 0x1e);
 
-	s6e63m0_dcs_write_seq_static(ctx, 0xba,
+	s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_X_BLUE,
 				     0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44,
 				     0x44, 0x55, 0x55, 0x66, 0x66, 0x66, 0x66,
 				     0x66, 0x66);
@@ -704,6 +725,7 @@ int s6e63m0_probe(struct device *dev,
 	if (!ctx)
 		return -ENOMEM;
 
+	ctx->dsi_mode = dsi_mode;
 	ctx->dcs_read = dcs_read;
 	ctx->dcs_write = dcs_write;
 	dev_set_drvdata(dev, ctx);
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 41bbec72b2da..71ae200ac48a 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -39,72 +39,145 @@
 #include <drm/drm_panel.h>
 
 /**
- * struct panel_desc
- * @modes: Pointer to array of fixed modes appropriate for this panel.  If
- *         only one mode then this can just be the address of this the mode.
- *         NOTE: cannot be used with "timings" and also if this is specified
- *         then you cannot override the mode in the device tree.
- * @num_modes: Number of elements in modes array.
- * @timings: Pointer to array of display timings.  NOTE: cannot be used with
- *           "modes" and also these will be used to validate a device tree
- *           override if one is present.
- * @num_timings: Number of elements in timings array.
- * @bpc: Bits per color.
- * @size: Structure containing the physical size of this panel.
- * @delay: Structure containing various delay values for this panel.
- * @bus_format: See MEDIA_BUS_FMT_... defines.
- * @bus_flags: See DRM_BUS_FLAG_... defines.
- * @connector_type: LVDS, eDP, DSI, DPI, etc.
+ * struct panel_desc - Describes a simple panel.
  */
 struct panel_desc {
+	/**
+	 * @modes: Pointer to array of fixed modes appropriate for this panel.
+	 *
+	 * If only one mode then this can just be the address of the mode.
+	 * NOTE: cannot be used with "timings" and also if this is specified
+	 * then you cannot override the mode in the device tree.
+	 */
 	const struct drm_display_mode *modes;
+
+	/** @num_modes: Number of elements in modes array. */
 	unsigned int num_modes;
+
+	/**
+	 * @timings: Pointer to array of display timings
+	 *
+	 * NOTE: cannot be used with "modes" and also these will be used to
+	 * validate a device tree override if one is present.
+	 */
 	const struct display_timing *timings;
+
+	/** @num_timings: Number of elements in timings array. */
 	unsigned int num_timings;
 
+	/** @bpc: Bits per color. */
 	unsigned int bpc;
 
-	/**
-	 * @width: width (in millimeters) of the panel's active display area
-	 * @height: height (in millimeters) of the panel's active display area
-	 */
+	/** @size: Structure containing the physical size of this panel. */
 	struct {
+		/**
+		 * @size.width: Width (in mm) of the active display area.
+		 */
 		unsigned int width;
+
+		/**
+		 * @size.height: Height (in mm) of the active display area.
+		 */
 		unsigned int height;
 	} size;
 
-	/**
-	 * @prepare: the time (in milliseconds) that it takes for the panel to
-	 *           become ready and start receiving video data
-	 * @hpd_absent_delay: Add this to the prepare delay if we know Hot
-	 *                    Plug Detect isn't used.
-	 * @enable: the time (in milliseconds) that it takes for the panel to
-	 *          display the first valid frame after starting to receive
-	 *          video data
-	 * @disable: the time (in milliseconds) that it takes for the panel to
-	 *           turn the display off (no content is visible)
-	 * @unprepare: the time (in milliseconds) that it takes for the panel
-	 *             to power itself down completely
-	 */
+	/** @delay: Structure containing various delay values for this panel. */
 	struct {
+		/**
+		 * @delay.prepare: Time for the panel to become ready.
+		 *
+		 * The time (in milliseconds) that it takes for the panel to
+		 * become ready and start receiving video data
+		 */
 		unsigned int prepare;
+
+		/**
+		 * @delay.hpd_absent_delay: Time to wait if HPD isn't hooked up.
+		 *
+		 * Add this to the prepare delay if we know Hot Plug Detect
+		 * isn't used.
+		 */
 		unsigned int hpd_absent_delay;
+
+		/**
+		 * @delay.prepare_to_enable: Time between prepare and enable.
+		 *
+		 * The minimum time, in milliseconds, that needs to have passed
+		 * between when prepare finished and enable may begin. If at
+		 * enable time less time has passed since prepare finished,
+		 * the driver waits for the remaining time.
+		 *
+		 * If a fixed enable delay is also specified, we'll start
+		 * counting before delaying for the fixed delay.
+		 *
+		 * If a fixed prepare delay is also specified, we won't start
+		 * counting until after the fixed delay. We can't overlap this
+		 * fixed delay with the min time because the fixed delay
+		 * doesn't happen at the end of the function if a HPD GPIO was
+		 * specified.
+		 *
+		 * In other words:
+		 *   prepare()
+		 *     ...
+		 *     // do fixed prepare delay
+		 *     // wait for HPD GPIO if applicable
+		 *     // start counting for prepare_to_enable
+		 *
+		 *   enable()
+		 *     // do fixed enable delay
+		 *     // enforce prepare_to_enable min time
+		 */
+		unsigned int prepare_to_enable;
+
+		/**
+		 * @delay.enable: Time for the panel to display a valid frame.
+		 *
+		 * The time (in milliseconds) that it takes for the panel to
+		 * display the first valid frame after starting to receive
+		 * video data.
+		 */
 		unsigned int enable;
+
+		/**
+		 * @delay.disable: Time for the panel to turn the display off.
+		 *
+		 * The time (in milliseconds) that it takes for the panel to
+		 * turn the display off (no content is visible).
+		 */
 		unsigned int disable;
+
+		/**
+		 * @delay.unprepare: Time to power down completely.
+		 *
+		 * The time (in milliseconds) that it takes for the panel
+		 * to power itself down completely.
+		 *
+		 * This time is used to prevent a future "prepare" from
+		 * starting until at least this many milliseconds has passed.
+		 * If at prepare time less time has passed since unprepare
+		 * finished, the driver waits for the remaining time.
+		 */
 		unsigned int unprepare;
 	} delay;
 
+	/** @bus_format: See MEDIA_BUS_FMT_... defines. */
 	u32 bus_format;
+
+	/** @bus_flags: See DRM_BUS_FLAG_... defines. */
 	u32 bus_flags;
+
+	/** @connector_type: LVDS, eDP, DSI, DPI, etc. */
 	int connector_type;
 };
 
 struct panel_simple {
 	struct drm_panel base;
-	bool prepared;
 	bool enabled;
 	bool no_hpd;
 
+	ktime_t prepared_time;
+	ktime_t unprepared_time;
+
 	const struct panel_desc *desc;
 
 	struct regulator *supply;
@@ -232,6 +305,20 @@ static int panel_simple_get_non_edid_modes(struct panel_simple *panel,
 	return num;
 }
 
+static void panel_simple_wait(ktime_t start_ktime, unsigned int min_ms)
+{
+	ktime_t now_ktime, min_ktime;
+
+	if (!min_ms)
+		return;
+
+	min_ktime = ktime_add(start_ktime, ms_to_ktime(min_ms));
+	now_ktime = ktime_get();
+
+	if (ktime_before(now_ktime, min_ktime))
+		msleep(ktime_to_ms(ktime_sub(min_ktime, now_ktime)) + 1);
+}
+
 static int panel_simple_disable(struct drm_panel *panel)
 {
 	struct panel_simple *p = to_panel_simple(panel);
@@ -251,17 +338,15 @@ static int panel_simple_unprepare(struct drm_panel *panel)
 {
 	struct panel_simple *p = to_panel_simple(panel);
 
-	if (!p->prepared)
+	if (p->prepared_time == 0)
 		return 0;
 
 	gpiod_set_value_cansleep(p->enable_gpio, 0);
 
 	regulator_disable(p->supply);
 
-	if (p->desc->delay.unprepare)
-		msleep(p->desc->delay.unprepare);
-
-	p->prepared = false;
+	p->prepared_time = 0;
+	p->unprepared_time = ktime_get();
 
 	return 0;
 }
@@ -298,9 +383,11 @@ static int panel_simple_prepare(struct drm_panel *panel)
 	int err;
 	int hpd_asserted;
 
-	if (p->prepared)
+	if (p->prepared_time != 0)
 		return 0;
 
+	panel_simple_wait(p->unprepared_time, p->desc->delay.unprepare);
+
 	err = regulator_enable(p->supply);
 	if (err < 0) {
 		dev_err(panel->dev, "failed to enable supply: %d\n", err);
@@ -335,7 +422,7 @@ static int panel_simple_prepare(struct drm_panel *panel)
 		}
 	}
 
-	p->prepared = true;
+	p->prepared_time = ktime_get();
 
 	return 0;
 }
@@ -350,6 +437,8 @@ static int panel_simple_enable(struct drm_panel *panel)
 	if (p->desc->delay.enable)
 		msleep(p->desc->delay.enable);
 
+	panel_simple_wait(p->prepared_time, p->desc->delay.prepare_to_enable);
+
 	p->enabled = true;
 
 	return 0;
@@ -516,7 +605,7 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 		return -ENOMEM;
 
 	panel->enabled = false;
-	panel->prepared = false;
+	panel->prepared_time = 0;
 	panel->desc = desc;
 
 	panel->no_hpd = of_property_read_bool(dev->of_node, "no-hpd");
@@ -1318,6 +1407,51 @@ static const struct panel_desc boe_nv101wxmn51 = {
 	},
 };
 
+static const struct drm_display_mode boe_nv110wtm_n61_modes[] = {
+	{
+		.clock = 207800,
+		.hdisplay = 2160,
+		.hsync_start = 2160 + 48,
+		.hsync_end = 2160 + 48 + 32,
+		.htotal = 2160 + 48 + 32 + 100,
+		.vdisplay = 1440,
+		.vsync_start = 1440 + 3,
+		.vsync_end = 1440 + 3 + 6,
+		.vtotal = 1440 + 3 + 6 + 31,
+		.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
+	},
+	{
+		.clock = 138500,
+		.hdisplay = 2160,
+		.hsync_start = 2160 + 48,
+		.hsync_end = 2160 + 48 + 32,
+		.htotal = 2160 + 48 + 32 + 100,
+		.vdisplay = 1440,
+		.vsync_start = 1440 + 3,
+		.vsync_end = 1440 + 3 + 6,
+		.vtotal = 1440 + 3 + 6 + 31,
+		.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
+	},
+};
+
+static const struct panel_desc boe_nv110wtm_n61 = {
+	.modes = boe_nv110wtm_n61_modes,
+	.num_modes = ARRAY_SIZE(boe_nv110wtm_n61_modes),
+	.bpc = 8,
+	.size = {
+		.width = 233,
+		.height = 155,
+	},
+	.delay = {
+		.hpd_absent_delay = 200,
+		.prepare_to_enable = 80,
+		.unprepare = 500,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_flags = DRM_BUS_FLAG_DATA_MSB_TO_LSB,
+	.connector_type = DRM_MODE_CONNECTOR_eDP,
+};
+
 /* Also used for boe_nv133fhm_n62 */
 static const struct drm_display_mode boe_nv133fhm_n61_modes = {
 	.clock = 147840,
@@ -4034,6 +4168,9 @@ static const struct of_device_id platform_of_match[] = {
 		.compatible = "boe,nv101wxmn51",
 		.data = &boe_nv101wxmn51,
 	}, {
+		.compatible = "boe,nv110wtm-n61",
+		.data = &boe_nv110wtm_n61,
+	}, {
 		.compatible = "boe,nv133fhm-n61",
 		.data = &boe_nv133fhm_n61,
 	}, {
diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
index b30510b1696a..a2c303e5732c 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
@@ -530,10 +530,8 @@ static int st7703_probe(struct mipi_dsi_device *dsi)
 		return -ENOMEM;
 
 	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
-	if (IS_ERR(ctx->reset_gpio)) {
-		dev_err(dev, "cannot get reset gpio\n");
-		return PTR_ERR(ctx->reset_gpio);
-	}
+	if (IS_ERR(ctx->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), "Failed to get reset gpio\n");
 
 	mipi_dsi_set_drvdata(dsi, ctx);
 
@@ -545,19 +543,13 @@ static int st7703_probe(struct mipi_dsi_device *dsi)
 	dsi->lanes = ctx->desc->lanes;
 
 	ctx->vcc = devm_regulator_get(dev, "vcc");
-	if (IS_ERR(ctx->vcc)) {
-		ret = PTR_ERR(ctx->vcc);
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "Failed to request vcc regulator: %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(ctx->vcc))
+		return dev_err_probe(dev, PTR_ERR(ctx->vcc), "Failed to request vcc regulator\n");
+
 	ctx->iovcc = devm_regulator_get(dev, "iovcc");
-	if (IS_ERR(ctx->iovcc)) {
-		ret = PTR_ERR(ctx->iovcc);
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "Failed to request iovcc regulator: %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(ctx->iovcc))
+		return dev_err_probe(dev, PTR_ERR(ctx->iovcc),
+				     "Failed to request iovcc regulator\n");
 
 	drm_panel_init(&ctx->panel, dev, &st7703_drm_funcs,
 		       DRM_MODE_CONNECTOR_DSI);