Merge tag 'drm-misc-next-2021-07-16' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v5.15:

UAPI Changes:

Cross-subsystem Changes:
- udmabuf: Add support for mapping hugepages
- Add dma-buf stats to sysfs.
- Assorted fixes to fbdev/omap2.
- dma-buf: Document DMA_BUF_IOCTL_SYNC
- Improve dma-buf non-dynamic exporter expectations better.
- Add module parameters for dma-buf size and list limit.
- Add HDMI codec support to vc4, to replace vc4's own codec.
- Document dma-buf implicit fencing rules.
- dma_resv_test_signaled test_all handling.

Core Changes:
- Extract i915's eDP backlight code into DRM helpers.
- Assorted docbook updates.
- Rework drm_dp_aux documentation.
- Add support for the DP aux bus.
- Shrink dma-fence-chain slightly.
- Add alloc/free helpers for dma-fence-chain.
- Assorted fixes to TTM., drm/of, bridge
- drm_gem_plane_helper_prepare/cleanup_fb is now the default for gem drivers.
- Small fix for scheduler completion.
- Remove use of drm_device.irq_enabled.
- Print the driver name to dmesg when registering framebuffer.
- Export drm/gem's shadow plane handling, and use it in vkms.
- Assorted small fixes.

Driver Changes:
- Add eDP backlight to nouveau.
- Assorted fixes and cleanups to nouveau, panfrost, vmwgfx, anx7625,
  amdgpu, gma500, radeon, mgag200, vgem, vc4, vkms, omapdrm.
- Add support for Samsung DB7430, Samsung ATNA33XC20, EDT ETMV570G2DHU,
  EDT ETM0350G0DH6, Innolux EJ030NA panels.
- Fix some simple pannels missing bus_format and connector types.
- Add mks-guest-stats instrumentation support to vmwgfx.
- Merge i915-ttm topic branch.
- Make s6e63m0 panel use Mipi-DBI helpers.
- Add detect() supoprt for AST.
- Use interrupts for hotplug on vc4.
- vmwgfx is now moved to drm-misc-next, as sroland is no longer a maintainer for now.
- vmwgfx now uses copies of vmware's internal device headers.
- Slowly convert ti-sn65dsi83 over to atomic.
- Rework amdgpu dma-resv handling.
- Fix virtio fencing for planes.
- Ensure amdgpu can always evict to SYSTEM.
- Many drivers fixed for implicit fencing rules.
- Set default prepare/cleanup fb for tiny, vram and simple helpers too.
- Rework panfrost gpu reset and related serialization.
- Update VKMS todo list.
- Make bochs a tiny gpu driver, and use vram helper.
- Use linux irq interfaces instead of drm_irq in some drivers.
- Add support for Raspberry Pi Pico to GUD.

Signed-off-by: Dave Airlie <airlied@redhat.com>

# gpg: Signature made Fri 16 Jul 2021 21:06:04 AEST
# gpg:                using RSA key B97BD6A80CAC4981091AE547FE558C72A67013C3
# gpg: Good signature from "Maarten Lankhorst <maarten.lankhorst@linux.intel.com>" [expired]
# gpg:                 aka "Maarten Lankhorst <maarten@debian.org>" [expired]
# gpg:                 aka "Maarten Lankhorst <maarten.lankhorst@canonical.com>" [expired]
# gpg: Note: This key has expired!
# Primary key fingerprint: B97B D6A8 0CAC 4981 091A  E547 FE55 8C72 A670 13C3
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/444811c3-cbec-e9d5-9a6b-9632eda7962a@linux.intel.com

9 files changed, 930 insertions, 104 deletions

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index ef87d92cdf49..bfc6c23b2509 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -82,6 +82,7 @@ config DRM_PANEL_SIMPLE
 	depends on BACKLIGHT_CLASS_DEVICE
 	depends on PM
 	select VIDEOMODE_HELPERS
+	select DRM_DP_AUX_BUS
 	help
 	  DRM panel driver for dumb panels that need at most a regulator and
 	  a GPIO to be powered up. Optionally a backlight can be attached so
@@ -133,6 +134,15 @@ config DRM_PANEL_ILITEK_ILI9881C
 	  Say Y if you want to enable support for panels based on the
 	  Ilitek ILI9881c controller.
 
+config DRM_PANEL_INNOLUX_EJ030NA
+        tristate "Innolux EJ030NA 320x480 LCD panel"
+        depends on OF && SPI
+        select REGMAP_SPI
+        help
+          Say Y here to enable support for the Innolux/Chimei EJ030NA
+          320x480 3.0" panel as found in the RS97 V2.1, RG300(non-ips)
+          and LDK handheld gaming consoles.
+
 config DRM_PANEL_INNOLUX_P079ZCA
 	tristate "Innolux P079ZCA panel"
 	depends on OF
@@ -343,6 +353,16 @@ config DRM_PANEL_RONBO_RB070D30
 	  Say Y here if you want to enable support for Ronbo Electronics
 	  RB070D30 1024x600 DSI panel.
 
+config DRM_PANEL_SAMSUNG_DB7430
+	tristate "Samsung DB7430-based DPI panels"
+	depends on OF && SPI && GPIOLIB
+	depends on BACKLIGHT_CLASS_DEVICE
+	select DRM_MIPI_DBI
+	help
+	  Say Y here if you want to enable support for the Samsung
+	  DB7430 DPI display controller used in such devices as the
+	  LMS397KF04 480x800 DPI panel.
+
 config DRM_PANEL_SAMSUNG_S6D16D0
 	tristate "Samsung S6D16D0 DSI video mode panel"
 	depends on OF
@@ -377,6 +397,7 @@ config DRM_PANEL_SAMSUNG_S6E63M0_SPI
 	depends on SPI
 	depends on DRM_PANEL_SAMSUNG_S6E63M0
 	default DRM_PANEL_SAMSUNG_S6E63M0
+	select DRM_MIPI_DBI
 	help
 	  Say Y here if you want to be able to access the Samsung
 	  S6E63M0 panel using SPI.
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index cae4d976c069..1b865e8ea7c9 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_DRM_PANEL_FEIXIN_K101_IM2BA02) += panel-feixin-k101-im2ba02.o
 obj-$(CONFIG_DRM_PANEL_FEIYANG_FY07024DI26A30D) += panel-feiyang-fy07024di26a30d.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
+obj-$(CONFIG_DRM_PANEL_INNOLUX_EJ030NA) += panel-innolux-ej030na.o
 obj-$(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
@@ -33,6 +34,7 @@ obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += panel-raspberrypi-touchscreen
 obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM67191) += panel-raydium-rm67191.o
 obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM68200) += panel-raydium-rm68200.o
 obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) += panel-samsung-db7430.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D16D0) += panel-samsung-s6d16d0.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
diff --git a/drivers/gpu/drm/panel/panel-innolux-ej030na.c b/drivers/gpu/drm/panel/panel-innolux-ej030na.c
new file mode 100644
index 000000000000..34b98f70bd22
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-innolux-ej030na.c
@@ -0,0 +1,289 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Innolux/Chimei EJ030NA TFT LCD panel driver
+ *
+ * Copyright (C) 2020, Paul Cercueil <paul@crapouillou.net>
+ * Copyright (C) 2020, Christophe Branchereau <cbranchereau@gmail.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct ej030na_info {
+	const struct drm_display_mode *display_modes;
+	unsigned int num_modes;
+	u16 width_mm, height_mm;
+	u32 bus_format, bus_flags;
+};
+
+struct ej030na {
+	struct drm_panel panel;
+	struct spi_device *spi;
+	struct regmap *map;
+
+	const struct ej030na_info *panel_info;
+
+	struct regulator *supply;
+	struct gpio_desc *reset_gpio;
+};
+
+static inline struct ej030na *to_ej030na(struct drm_panel *panel)
+{
+	return container_of(panel, struct ej030na, panel);
+}
+
+static const struct reg_sequence ej030na_init_sequence[] = {
+	{ 0x05, 0x1e },
+	{ 0x05, 0x5c },
+	{ 0x02, 0x14 },
+	{ 0x03, 0x40 },
+	{ 0x04, 0x07 },
+	{ 0x06, 0x12 },
+	{ 0x07, 0xd2 },
+	{ 0x0c, 0x06 },
+	{ 0x0d, 0x40 },
+	{ 0x0e, 0x40 },
+	{ 0x0f, 0x40 },
+	{ 0x10, 0x40 },
+	{ 0x11, 0x40 },
+	{ 0x2f, 0x40 },
+	{ 0x5a, 0x02 },
+
+	{ 0x30, 0x07 },
+	{ 0x31, 0x57 },
+	{ 0x32, 0x53 },
+	{ 0x33, 0x77 },
+	{ 0x34, 0xb8 },
+	{ 0x35, 0xbd },
+	{ 0x36, 0xb8 },
+	{ 0x37, 0xe7 },
+	{ 0x38, 0x04 },
+	{ 0x39, 0xff },
+
+	{ 0x40, 0x0b },
+	{ 0x41, 0xb8 },
+	{ 0x42, 0xab },
+	{ 0x43, 0xb9 },
+	{ 0x44, 0x6a },
+	{ 0x45, 0x56 },
+	{ 0x46, 0x61 },
+	{ 0x47, 0x08 },
+	{ 0x48, 0x0f },
+	{ 0x49, 0x0f },
+
+	{ 0x2b, 0x01 },
+};
+
+static int ej030na_prepare(struct drm_panel *panel)
+{
+	struct ej030na *priv = to_ej030na(panel);
+	struct device *dev = &priv->spi->dev;
+	int err;
+
+	err = regulator_enable(priv->supply);
+	if (err) {
+		dev_err(dev, "Failed to enable power supply: %d\n", err);
+		return err;
+	}
+
+	/* Reset the chip */
+	gpiod_set_value_cansleep(priv->reset_gpio, 1);
+	usleep_range(50, 150);
+	gpiod_set_value_cansleep(priv->reset_gpio, 0);
+	usleep_range(50, 150);
+
+	err = regmap_multi_reg_write(priv->map, ej030na_init_sequence,
+				     ARRAY_SIZE(ej030na_init_sequence));
+	if (err) {
+		dev_err(dev, "Failed to init registers: %d\n", err);
+		goto err_disable_regulator;
+	}
+
+	msleep(120);
+
+	return 0;
+
+err_disable_regulator:
+	regulator_disable(priv->supply);
+	return err;
+}
+
+static int ej030na_unprepare(struct drm_panel *panel)
+{
+	struct ej030na *priv = to_ej030na(panel);
+
+	gpiod_set_value_cansleep(priv->reset_gpio, 1);
+	regulator_disable(priv->supply);
+
+	return 0;
+}
+
+static int ej030na_get_modes(struct drm_panel *panel,
+			     struct drm_connector *connector)
+{
+	struct ej030na *priv = to_ej030na(panel);
+	const struct ej030na_info *panel_info = priv->panel_info;
+	struct drm_display_mode *mode;
+	unsigned int i;
+
+	for (i = 0; i < panel_info->num_modes; i++) {
+		mode = drm_mode_duplicate(connector->dev,
+					  &panel_info->display_modes[i]);
+		if (!mode)
+			return -ENOMEM;
+
+		drm_mode_set_name(mode);
+
+		mode->type = DRM_MODE_TYPE_DRIVER;
+		if (panel_info->num_modes == 1)
+			mode->type |= DRM_MODE_TYPE_PREFERRED;
+
+		drm_mode_probed_add(connector, mode);
+	}
+
+	connector->display_info.bpc = 8;
+	connector->display_info.width_mm = panel_info->width_mm;
+	connector->display_info.height_mm = panel_info->height_mm;
+
+	drm_display_info_set_bus_formats(&connector->display_info,
+					 &panel_info->bus_format, 1);
+	connector->display_info.bus_flags = panel_info->bus_flags;
+
+	return panel_info->num_modes;
+}
+
+static const struct drm_panel_funcs ej030na_funcs = {
+	.prepare	= ej030na_prepare,
+	.unprepare	= ej030na_unprepare,
+	.get_modes	= ej030na_get_modes,
+};
+
+static const struct regmap_config ej030na_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0x5a,
+};
+
+static int ej030na_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct ej030na *priv;
+	int err;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->spi = spi;
+	spi_set_drvdata(spi, priv);
+
+	priv->map = devm_regmap_init_spi(spi, &ej030na_regmap_config);
+	if (IS_ERR(priv->map)) {
+		dev_err(dev, "Unable to init regmap\n");
+		return PTR_ERR(priv->map);
+	}
+
+	priv->panel_info = of_device_get_match_data(dev);
+	if (!priv->panel_info)
+		return -EINVAL;
+
+	priv->supply = devm_regulator_get(dev, "power");
+	if (IS_ERR(priv->supply)) {
+		dev_err(dev, "Failed to get power supply\n");
+		return PTR_ERR(priv->supply);
+	}
+
+	priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(priv->reset_gpio)) {
+		dev_err(dev, "Failed to get reset GPIO\n");
+		return PTR_ERR(priv->reset_gpio);
+	}
+
+	drm_panel_init(&priv->panel, dev, &ej030na_funcs,
+		       DRM_MODE_CONNECTOR_DPI);
+
+	err = drm_panel_of_backlight(&priv->panel);
+	if (err)
+		return err;
+
+	drm_panel_add(&priv->panel);
+
+	return 0;
+}
+
+static int ej030na_remove(struct spi_device *spi)
+{
+	struct ej030na *priv = spi_get_drvdata(spi);
+
+	drm_panel_remove(&priv->panel);
+	drm_panel_disable(&priv->panel);
+	drm_panel_unprepare(&priv->panel);
+
+	return 0;
+}
+
+static const struct drm_display_mode ej030na_modes[] = {
+	{ /* 60 Hz */
+		.clock = 14400,
+		.hdisplay = 320,
+		.hsync_start = 320 + 10,
+		.hsync_end = 320 + 10 + 37,
+		.htotal = 320 + 10 + 37 + 33,
+		.vdisplay = 480,
+		.vsync_start = 480 + 102,
+		.vsync_end = 480 + 102 + 9 + 9,
+		.vtotal = 480 + 102 + 9 + 9,
+		.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+	},
+	{ /* 50 Hz */
+		.clock = 12000,
+		.hdisplay = 320,
+		.hsync_start = 320 + 10,
+		.hsync_end = 320 + 10 + 37,
+		.htotal = 320 + 10 + 37 + 33,
+		.vdisplay = 480,
+		.vsync_start = 480 + 102,
+		.vsync_end = 480 + 102 + 9,
+		.vtotal = 480 + 102 + 9 + 9,
+		.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+	},
+};
+
+static const struct ej030na_info ej030na_info = {
+	.display_modes = ej030na_modes,
+	.num_modes = ARRAY_SIZE(ej030na_modes),
+	.width_mm = 70,
+	.height_mm = 51,
+	.bus_format = MEDIA_BUS_FMT_RGB888_3X8_DELTA,
+	.bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE | DRM_BUS_FLAG_DE_LOW,
+};
+
+static const struct of_device_id ej030na_of_match[] = {
+	{ .compatible = "innolux,ej030na", .data = &ej030na_info },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ej030na_of_match);
+
+static struct spi_driver ej030na_driver = {
+	.driver = {
+		.name = "panel-innolux-ej030na",
+		.of_match_table = ej030na_of_match,
+	},
+	.probe = ej030na_probe,
+	.remove = ej030na_remove,
+};
+module_spi_driver(ej030na_driver);
+
+MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
+MODULE_AUTHOR("Christophe Branchereau <cbranchereau@gmail.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/panel/panel-samsung-db7430.c b/drivers/gpu/drm/panel/panel-samsung-db7430.c
new file mode 100644
index 000000000000..ead479719f00
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-db7430.c
@@ -0,0 +1,347 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Panel driver for the Samsung LMS397KF04 480x800 DPI RGB panel.
+ * According to the data sheet the display controller is called DB7430.
+ * Found in the Samsung Galaxy Beam GT-I8350 mobile phone.
+ * Linus Walleij <linus.walleij@linaro.org>
+ */
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#include <video/mipi_display.h>
+
+#define DB7430_ACCESS_PROT_OFF		0xb0
+#define DB7430_UNKNOWN_B4		0xb4
+#define DB7430_USER_SELECT		0xb5
+#define DB7430_UNKNOWN_B7		0xb7
+#define DB7430_UNKNOWN_B8		0xb8
+#define DB7430_PANEL_DRIVING		0xc0
+#define DB7430_SOURCE_CONTROL		0xc1
+#define DB7430_GATE_INTERFACE		0xc4
+#define DB7430_DISPLAY_H_TIMING		0xc5
+#define DB7430_RGB_SYNC_OPTION		0xc6
+#define DB7430_GAMMA_SET_RED		0xc8
+#define DB7430_GAMMA_SET_GREEN		0xc9
+#define DB7430_GAMMA_SET_BLUE		0xca
+#define DB7430_BIAS_CURRENT_CTRL	0xd1
+#define DB7430_DDV_CTRL			0xd2
+#define DB7430_GAMMA_CTRL_REF		0xd3
+#define DB7430_UNKNOWN_D4		0xd4
+#define DB7430_DCDC_CTRL		0xd5
+#define DB7430_VCL_CTRL			0xd6
+#define DB7430_UNKNOWN_F8		0xf8
+#define DB7430_UNKNOWN_FC		0xfc
+
+#define DATA_MASK	0x100
+
+/**
+ * struct db7430 - state container for a panel controlled by the DB7430
+ * controller
+ */
+struct db7430 {
+	/** @dev: the container device */
+	struct device *dev;
+	/** @dbi: the DBI bus abstraction handle */
+	struct mipi_dbi dbi;
+	/** @panel: the DRM panel instance for this device */
+	struct drm_panel panel;
+	/** @width: the width of this panel in mm */
+	u32 width;
+	/** @height: the height of this panel in mm */
+	u32 height;
+	/** @reset: reset GPIO line */
+	struct gpio_desc *reset;
+	/** @regulators: VCCIO and VIO supply regulators */
+	struct regulator_bulk_data regulators[2];
+};
+
+static const struct drm_display_mode db7430_480_800_mode = {
+	/*
+	 * 31 ns period min (htotal*vtotal*vrefresh)/1000
+	 * gives a Vrefresh of ~71 Hz.
+	 */
+	.clock = 32258,
+	.hdisplay = 480,
+	.hsync_start = 480 + 10,
+	.hsync_end = 480 + 10 + 4,
+	.htotal = 480 + 10 + 4 + 40,
+	.vdisplay = 800,
+	.vsync_start = 800 + 6,
+	.vsync_end = 800 + 6 + 1,
+	.vtotal = 800 + 6 + 1 + 7,
+	.width_mm = 53,
+	.height_mm = 87,
+	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+};
+
+static inline struct db7430 *to_db7430(struct drm_panel *panel)
+{
+	return container_of(panel, struct db7430, panel);
+}
+
+static int db7430_power_on(struct db7430 *db)
+{
+	struct mipi_dbi *dbi = &db->dbi;
+	int ret;
+
+	/* Power up */
+	ret = regulator_bulk_enable(ARRAY_SIZE(db->regulators),
+				    db->regulators);
+	if (ret) {
+		dev_err(db->dev, "failed to enable regulators: %d\n", ret);
+		return ret;
+	}
+	msleep(50);
+
+	/* Assert reset >=1 ms */
+	gpiod_set_value_cansleep(db->reset, 1);
+	usleep_range(1000, 5000);
+	/* De-assert reset */
+	gpiod_set_value_cansleep(db->reset, 0);
+	/* Wait >= 10 ms */
+	msleep(10);
+	dev_dbg(db->dev, "de-asserted RESET\n");
+
+	/*
+	 * This is set to 0x0a (RGB/BGR order + horizontal flip) in order
+	 * to make the display behave normally. If this is not set the displays
+	 * normal output behaviour is horizontally flipped and BGR ordered. Do
+	 * it twice because the first message doesn't always "take".
+	 */
+	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, 0x0a);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, 0x0a);
+	mipi_dbi_command(dbi, DB7430_ACCESS_PROT_OFF, 0x00);
+	mipi_dbi_command(dbi, DB7430_PANEL_DRIVING, 0x28, 0x08);
+	mipi_dbi_command(dbi, DB7430_SOURCE_CONTROL,
+			 0x01, 0x30, 0x15, 0x05, 0x22);
+	mipi_dbi_command(dbi, DB7430_GATE_INTERFACE,
+			 0x10, 0x01, 0x00);
+	mipi_dbi_command(dbi, DB7430_DISPLAY_H_TIMING,
+			 0x06, 0x55, 0x03, 0x07, 0x0b,
+			 0x33, 0x00, 0x01, 0x03);
+	/*
+	 * 0x00 in datasheet 0x01 in vendor code 0x00, it seems 0x01 means
+	 * DE active high and 0x00 means DE active low.
+	 */
+	mipi_dbi_command(dbi, DB7430_RGB_SYNC_OPTION, 0x01);
+	mipi_dbi_command(dbi, DB7430_GAMMA_SET_RED,
+		/* R positive gamma */ 0x00,
+		0x0A, 0x31, 0x3B, 0x4E, 0x58, 0x59, 0x5B, 0x58, 0x5E, 0x62,
+		0x60, 0x61, 0x5E, 0x62, 0x55, 0x55, 0x7F, 0x08,
+		/* R negative gamma */ 0x00,
+		0x0A, 0x31, 0x3B, 0x4E, 0x58, 0x59, 0x5B, 0x58, 0x5E, 0x62,
+		0x60, 0x61, 0x5E, 0x62, 0x55, 0x55, 0x7F, 0x08);
+	mipi_dbi_command(dbi, DB7430_GAMMA_SET_GREEN,
+		/* G positive gamma */ 0x00,
+		0x25, 0x15, 0x28, 0x3D, 0x4A, 0x48, 0x4C, 0x4A, 0x52, 0x59,
+		0x59, 0x5B, 0x56, 0x60, 0x5D, 0x55, 0x7F, 0x0A,
+		/* G negative gamma */ 0x00,
+		0x25, 0x15, 0x28, 0x3D, 0x4A, 0x48, 0x4C, 0x4A, 0x52, 0x59,
+		0x59, 0x5B, 0x56, 0x60, 0x5D, 0x55, 0x7F, 0x0A);
+	mipi_dbi_command(dbi, DB7430_GAMMA_SET_BLUE,
+		/* B positive gamma */ 0x00,
+		0x48, 0x10, 0x1F, 0x2F, 0x35, 0x38, 0x3D, 0x3C, 0x45, 0x4D,
+		0x4E, 0x52, 0x51, 0x60, 0x7F, 0x7E, 0x7F, 0x0C,
+		/* B negative gamma */ 0x00,
+		0x48, 0x10, 0x1F, 0x2F, 0x35, 0x38, 0x3D, 0x3C, 0x45, 0x4D,
+		0x4E, 0x52, 0x51, 0x60, 0x7F, 0x7E, 0x7F, 0x0C);
+	mipi_dbi_command(dbi, DB7430_BIAS_CURRENT_CTRL, 0x33, 0x13);
+	mipi_dbi_command(dbi, DB7430_DDV_CTRL, 0x11, 0x00, 0x00);
+	mipi_dbi_command(dbi, DB7430_GAMMA_CTRL_REF, 0x50, 0x50);
+	mipi_dbi_command(dbi, DB7430_DCDC_CTRL, 0x2f, 0x11, 0x1e, 0x46);
+	mipi_dbi_command(dbi, DB7430_VCL_CTRL, 0x11, 0x0a);
+
+	return 0;
+}
+
+static int db7430_power_off(struct db7430 *db)
+{
+	/* Go into RESET and disable regulators */
+	gpiod_set_value_cansleep(db->reset, 1);
+	return regulator_bulk_disable(ARRAY_SIZE(db->regulators),
+				      db->regulators);
+}
+
+static int db7430_unprepare(struct drm_panel *panel)
+{
+	return db7430_power_off(to_db7430(panel));
+}
+
+static int db7430_disable(struct drm_panel *panel)
+{
+	struct db7430 *db = to_db7430(panel);
+	struct mipi_dbi *dbi = &db->dbi;
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
+	msleep(25);
+	mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);
+	msleep(120);
+
+	return 0;
+}
+
+static int db7430_prepare(struct drm_panel *panel)
+{
+	return db7430_power_on(to_db7430(panel));
+}
+
+static int db7430_enable(struct drm_panel *panel)
+{
+	struct db7430 *db = to_db7430(panel);
+	struct mipi_dbi *dbi = &db->dbi;
+
+	/* Exit sleep mode */
+	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+	msleep(20);
+
+	/* NVM (non-volatile memory) load sequence */
+	mipi_dbi_command(dbi, DB7430_UNKNOWN_D4, 0x52, 0x5e);
+	mipi_dbi_command(dbi, DB7430_UNKNOWN_F8, 0x01, 0xf5, 0xf2, 0x71, 0x44);
+	mipi_dbi_command(dbi, DB7430_UNKNOWN_FC, 0x00, 0x08);
+	msleep(150);
+
+	/* CABC turn on sequence (BC = backlight control) */
+	mipi_dbi_command(dbi, DB7430_UNKNOWN_B4, 0x0f, 0x00, 0x50);
+	mipi_dbi_command(dbi, DB7430_USER_SELECT, 0x80);
+	mipi_dbi_command(dbi, DB7430_UNKNOWN_B7, 0x24);
+	mipi_dbi_command(dbi, DB7430_UNKNOWN_B8, 0x01);
+
+	/* Turn on display */
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+
+	return 0;
+}
+
+/**
+ * db7430_get_modes() - return the mode
+ * @panel: the panel to get the mode for
+ * @connector: reference to the central DRM connector control structure
+ */
+static int db7430_get_modes(struct drm_panel *panel,
+			    struct drm_connector *connector)
+{
+	struct db7430 *db = to_db7430(panel);
+	struct drm_display_mode *mode;
+	static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+
+	mode = drm_mode_duplicate(connector->dev, &db7430_480_800_mode);
+	if (!mode) {
+		dev_err(db->dev, "failed to add mode\n");
+		return -ENOMEM;
+	}
+
+	connector->display_info.bpc = 8;
+	connector->display_info.width_mm = mode->width_mm;
+	connector->display_info.height_mm = mode->height_mm;
+	connector->display_info.bus_flags =
+		DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE;
+	drm_display_info_set_bus_formats(&connector->display_info,
+					 &bus_format, 1);
+
+	drm_mode_set_name(mode);
+	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+
+	drm_mode_probed_add(connector, mode);
+
+	return 1;
+}
+
+static const struct drm_panel_funcs db7430_drm_funcs = {
+	.disable = db7430_disable,
+	.unprepare = db7430_unprepare,
+	.prepare = db7430_prepare,
+	.enable = db7430_enable,
+	.get_modes = db7430_get_modes,
+};
+
+static int db7430_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct db7430 *db;
+	int ret;
+
+	db = devm_kzalloc(dev, sizeof(*db), GFP_KERNEL);
+	if (!db)
+		return -ENOMEM;
+	db->dev = dev;
+
+	/*
+	 * VCI   is the analog voltage supply
+	 * VCCIO is the digital I/O voltage supply
+	 */
+	db->regulators[0].supply = "vci";
+	db->regulators[1].supply = "vccio";
+	ret = devm_regulator_bulk_get(dev,
+				      ARRAY_SIZE(db->regulators),
+				      db->regulators);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to get regulators\n");
+
+	db->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(db->reset)) {
+		ret = PTR_ERR(db->reset);
+		return dev_err_probe(dev, ret, "no RESET GPIO\n");
+	}
+
+	ret = mipi_dbi_spi_init(spi, &db->dbi, NULL);
+	if (ret)
+		return dev_err_probe(dev, ret, "MIPI DBI init failed\n");
+
+	drm_panel_init(&db->panel, dev, &db7430_drm_funcs,
+		       DRM_MODE_CONNECTOR_DPI);
+
+	/* FIXME: if no external backlight, use internal backlight */
+	ret = drm_panel_of_backlight(&db->panel);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to add backlight\n");
+
+	spi_set_drvdata(spi, db);
+
+	drm_panel_add(&db->panel);
+	dev_dbg(dev, "added panel\n");
+
+	return 0;
+}
+
+static int db7430_remove(struct spi_device *spi)
+{
+	struct db7430 *db = spi_get_drvdata(spi);
+
+	drm_panel_remove(&db->panel);
+	return 0;
+}
+
+/*
+ * The DB7430 display controller may be used in several display products,
+ * so list the different variants here and add per-variant data if needed.
+ */
+static const struct of_device_id db7430_match[] = {
+	{ .compatible = "samsung,lms397kf04", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, db7430_match);
+
+static struct spi_driver db7430_driver = {
+	.probe		= db7430_probe,
+	.remove		= db7430_remove,
+	.driver		= {
+		.name	= "db7430-panel",
+		.of_match_table = db7430_match,
+	},
+};
+module_spi_driver(db7430_driver);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("Samsung DB7430 panel driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c
index 07a48f621289..e0b1a7e354f3 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c
@@ -16,7 +16,8 @@
 #define MCS_GLOBAL_PARAM	0xb0
 #define S6E63M0_DSI_MAX_CHUNK	15 /* CMD + 15 bytes max */
 
-static int s6e63m0_dsi_dcs_read(struct device *dev, const u8 cmd, u8 *data)
+static int s6e63m0_dsi_dcs_read(struct device *dev, void *trsp,
+				const u8 cmd, u8 *data)
 {
 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
 	int ret;
@@ -32,7 +33,8 @@ static int s6e63m0_dsi_dcs_read(struct device *dev, const u8 cmd, u8 *data)
 	return 0;
 }
 
-static int s6e63m0_dsi_dcs_write(struct device *dev, const u8 *data, size_t len)
+static int s6e63m0_dsi_dcs_write(struct device *dev, void *trsp,
+				 const u8 *data, size_t len)
 {
 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
 	const u8 *seqp = data;
@@ -99,8 +101,8 @@ static int s6e63m0_dsi_probe(struct mipi_dsi_device *dsi)
 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
 		MIPI_DSI_MODE_VIDEO_BURST;
 
-	ret = s6e63m0_probe(dev, s6e63m0_dsi_dcs_read, s6e63m0_dsi_dcs_write,
-			    true);
+	ret = s6e63m0_probe(dev, NULL, s6e63m0_dsi_dcs_read,
+			    s6e63m0_dsi_dcs_write, true);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
index 326deb3177b6..3669cc3719ce 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
@@ -5,62 +5,38 @@
 #include <linux/spi/spi.h>
 #include <linux/delay.h>
 
+#include <drm/drm_mipi_dbi.h>
 #include <drm/drm_print.h>
 
 #include "panel-samsung-s6e63m0.h"
 
-#define DATA_MASK	0x100
+static const u8 s6e63m0_dbi_read_commands[] = {
+	MCS_READ_ID1,
+	MCS_READ_ID2,
+	MCS_READ_ID3,
+	0, /* sentinel */
+};
 
-static int s6e63m0_spi_dcs_read(struct device *dev, const u8 cmd, u8 *data)
+static int s6e63m0_spi_dcs_read(struct device *dev, void *trsp,
+				const u8 cmd, u8 *data)
 {
-	struct spi_device *spi = to_spi_device(dev);
-	u16 buf[1];
-	u16 rbuf[1];
+	struct mipi_dbi *dbi = trsp;
 	int ret;
 
-	/* SPI buffers are always in CPU order */
-	buf[0] = (u16)cmd;
-	ret = spi_write_then_read(spi, buf, 2, rbuf, 2);
-	dev_dbg(dev, "READ CMD: %04x RET: %04x\n", buf[0], rbuf[0]);
-	if (!ret)
-		/* These high 8 bits of the 9 contains the readout */
-		*data = (rbuf[0] & 0x1ff) >> 1;
+	ret = mipi_dbi_command_read(dbi, cmd, data);
+	if (ret)
+		dev_err(dev, "error on DBI read command %02x\n", cmd);
 
 	return ret;
 }
 
-static int s6e63m0_spi_write_word(struct device *dev, u16 data)
-{
-	struct spi_device *spi = to_spi_device(dev);
-
-	/* SPI buffers are always in CPU order */
-	return spi_write(spi, &data, 2);
-}
-
-static int s6e63m0_spi_dcs_write(struct device *dev, const u8 *data, size_t len)
+static int s6e63m0_spi_dcs_write(struct device *dev, void *trsp,
+				 const u8 *data, size_t len)
 {
-	int ret = 0;
-
-	dev_dbg(dev, "SPI writing dcs seq: %*ph\n", (int)len, data);
-
-	/*
-	 * This sends 9 bits with the first bit (bit 8) set to 0
-	 * This indicates that this is a command. Anything after the
-	 * command is data.
-	 */
-	ret = s6e63m0_spi_write_word(dev, *data);
-
-	while (!ret && --len) {
-		++data;
-		/* This sends 9 bits with the first bit (bit 8) set to 1 */
-		ret = s6e63m0_spi_write_word(dev, *data | DATA_MASK);
-	}
-
-	if (ret) {
-		dev_err(dev, "SPI error %d writing dcs seq: %*ph\n", ret,
-			(int)len, data);
-	}
+	struct mipi_dbi *dbi = trsp;
+	int ret;
 
+	ret = mipi_dbi_command_stackbuf(dbi, data[0], (data + 1), (len - 1));
 	usleep_range(300, 310);
 
 	return ret;
@@ -69,18 +45,21 @@ static int s6e63m0_spi_dcs_write(struct device *dev, const u8 *data, size_t len)
 static int s6e63m0_spi_probe(struct spi_device *spi)
 {
 	struct device *dev = &spi->dev;
+	struct mipi_dbi *dbi;
 	int ret;
 
-	spi->bits_per_word = 9;
-	/* Preserve e.g. SPI_3WIRE setting */
-	spi->mode |= SPI_MODE_3;
-	ret = spi_setup(spi);
-	if (ret < 0) {
-		dev_err(dev, "spi setup failed.\n");
-		return ret;
-	}
-	return s6e63m0_probe(dev, s6e63m0_spi_dcs_read, s6e63m0_spi_dcs_write,
-			     false);
+	dbi = devm_kzalloc(dev, sizeof(*dbi), GFP_KERNEL);
+	if (!dbi)
+		return -ENOMEM;
+
+	ret = mipi_dbi_spi_init(spi, dbi, NULL);
+	if (ret)
+		return dev_err_probe(dev, ret, "MIPI DBI init failed\n");
+	/* Register our custom MCS read commands */
+	dbi->read_commands = s6e63m0_dbi_read_commands;
+
+	return s6e63m0_probe(dev, dbi, s6e63m0_spi_dcs_read,
+			     s6e63m0_spi_dcs_write, false);
 }
 
 static int s6e63m0_spi_remove(struct spi_device *spi)
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
index 603c5dfe8768..35d72ac663d6 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
@@ -22,31 +22,6 @@
 
 #include "panel-samsung-s6e63m0.h"
 
-/* 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
-#define MCS_READ_ID1		0xda
-#define MCS_READ_ID2		0xdb
-#define MCS_READ_ID3		0xdc
-#define MCS_LEVEL_2_KEY		0xf0
-#define MCS_MTP_KEY		0xf1
-#define MCS_DISCTL		0xf2
-#define MCS_SRCCTL		0xf6
-#define MCS_IFCTL		0xf7
-#define MCS_PANELCTL		0xf8
-#define MCS_PGAMMACTL		0xfa
-
 #define S6E63M0_LCD_ID_VALUE_M2		0xA4
 #define S6E63M0_LCD_ID_VALUE_SM2	0xB4
 #define S6E63M0_LCD_ID_VALUE_SM2_1	0xB6
@@ -283,8 +258,9 @@ static u8 const s6e63m0_elvss_per_gamma[NUM_GAMMA_LEVELS] = {
 
 struct s6e63m0 {
 	struct device *dev;
-	int (*dcs_read)(struct device *dev, const u8 cmd, u8 *val);
-	int (*dcs_write)(struct device *dev, const u8 *data, size_t len);
+	void *transport_data;
+	int (*dcs_read)(struct device *dev, void *trsp, const u8 cmd, u8 *val);
+	int (*dcs_write)(struct device *dev, void *trsp, const u8 *data, size_t len);
 	struct drm_panel panel;
 	struct backlight_device *bl_dev;
 	u8 lcd_type;
@@ -340,7 +316,7 @@ static void s6e63m0_dcs_read(struct s6e63m0 *ctx, const u8 cmd, u8 *data)
 	if (ctx->error < 0)
 		return;
 
-	ctx->error = ctx->dcs_read(ctx->dev, cmd, data);
+	ctx->error = ctx->dcs_read(ctx->dev, ctx->transport_data, cmd, data);
 }
 
 static void s6e63m0_dcs_write(struct s6e63m0 *ctx, const u8 *data, size_t len)
@@ -348,7 +324,7 @@ static void s6e63m0_dcs_write(struct s6e63m0 *ctx, const u8 *data, size_t len)
 	if (ctx->error < 0 || len == 0)
 		return;
 
-	ctx->error = ctx->dcs_write(ctx->dev, data, len);
+	ctx->error = ctx->dcs_write(ctx->dev, ctx->transport_data, data, len);
 }
 
 #define s6e63m0_dcs_write_seq_static(ctx, seq ...) \
@@ -713,9 +689,9 @@ static int s6e63m0_backlight_register(struct s6e63m0 *ctx, u32 max_brightness)
 	return ret;
 }
 
-int s6e63m0_probe(struct device *dev,
-		  int (*dcs_read)(struct device *dev, const u8 cmd, u8 *val),
-		  int (*dcs_write)(struct device *dev, const u8 *data, size_t len),
+int s6e63m0_probe(struct device *dev, void *trsp,
+		  int (*dcs_read)(struct device *dev, void *trsp, const u8 cmd, u8 *val),
+		  int (*dcs_write)(struct device *dev, void *trsp, const u8 *data, size_t len),
 		  bool dsi_mode)
 {
 	struct s6e63m0 *ctx;
@@ -726,6 +702,7 @@ int s6e63m0_probe(struct device *dev,
 	if (!ctx)
 		return -ENOMEM;
 
+	ctx->transport_data = trsp;
 	ctx->dsi_mode = dsi_mode;
 	ctx->dcs_read = dcs_read;
 	ctx->dcs_write = dcs_write;
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.h b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.h
index c669fec91763..306605ed1117 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.h
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.h
@@ -3,9 +3,36 @@
 #ifndef _PANEL_SAMSUNG_S6E63M0_H
 #define _PANEL_SAMSUNG_S6E63M0_H
 
-int s6e63m0_probe(struct device *dev,
-		  int (*dcs_read)(struct device *dev, const u8 cmd, u8 *val),
-		  int (*dcs_write)(struct device *dev, const u8 *data,
+/* 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
+#define MCS_READ_ID1		0xda
+#define MCS_READ_ID2		0xdb
+#define MCS_READ_ID3		0xdc
+#define MCS_LEVEL_2_KEY		0xf0
+#define MCS_MTP_KEY		0xf1
+#define MCS_DISCTL		0xf2
+#define MCS_SRCCTL		0xf6
+#define MCS_IFCTL		0xf7
+#define MCS_PANELCTL		0xf8
+#define MCS_PGAMMACTL		0xfa
+
+int s6e63m0_probe(struct device *dev, void *trsp,
+		  int (*dcs_read)(struct device *dev, void *trsp,
+				  const u8 cmd, u8 *val),
+		  int (*dcs_write)(struct device *dev, void *trsp,
+				   const u8 *data,
 				   size_t len),
 		  bool dsi_mode);
 int s6e63m0_remove(struct device *dev);
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 21939d4352cf..9b286bd4444f 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -36,6 +36,8 @@
 
 #include <drm/drm_crtc.h>
 #include <drm/drm_device.h>
+#include <drm/drm_dp_aux_bus.h>
+#include <drm/drm_dp_helper.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_panel.h>
 
@@ -131,6 +133,22 @@ struct panel_desc {
 		unsigned int prepare_to_enable;
 
 		/**
+		 * @delay.power_to_enable: Time for the power to enable the display on.
+		 *
+		 * The time (in milliseconds) to wait after powering up the display
+		 * before asserting its enable pin.
+		 */
+		unsigned int power_to_enable;
+
+		/**
+		 * @delay.disable_to_power_off: Time for the disable to power the display off.
+		 *
+		 * The time (in milliseconds) to wait before powering off the display
+		 * after deasserting its enable pin.
+		 */
+		unsigned int disable_to_power_off;
+
+		/**
 		 * @delay.enable: Time for the panel to display a valid frame.
 		 *
 		 * The time (in milliseconds) that it takes for the panel to
@@ -185,6 +203,7 @@ struct panel_simple {
 
 	struct regulator *supply;
 	struct i2c_adapter *ddc;
+	struct drm_dp_aux *aux;
 
 	struct gpio_desc *enable_gpio;
 	struct gpio_desc *hpd_gpio;
@@ -344,6 +363,10 @@ static int panel_simple_suspend(struct device *dev)
 	struct panel_simple *p = dev_get_drvdata(dev);
 
 	gpiod_set_value_cansleep(p->enable_gpio, 0);
+
+	if (p->desc->delay.disable_to_power_off)
+		msleep(p->desc->delay.disable_to_power_off);
+
 	regulator_disable(p->supply);
 	p->unprepared_time = ktime_get();
 
@@ -404,6 +427,9 @@ static int panel_simple_prepare_once(struct panel_simple *p)
 		return err;
 	}
 
+	if (p->desc->delay.power_to_enable)
+		msleep(p->desc->delay.power_to_enable);
+
 	gpiod_set_value_cansleep(p->enable_gpio, 1);
 
 	delay = p->desc->delay.prepare;
@@ -657,7 +683,8 @@ static void panel_simple_parse_panel_timing_node(struct device *dev,
 		dev_err(dev, "Reject override mode: No display_timing found\n");
 }
 
-static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
+static int panel_simple_probe(struct device *dev, const struct panel_desc *desc,
+			      struct drm_dp_aux *aux)
 {
 	struct panel_simple *panel;
 	struct display_timing dt;
@@ -673,6 +700,7 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 	panel->enabled = false;
 	panel->prepared_time = 0;
 	panel->desc = desc;
+	panel->aux = aux;
 
 	panel->no_hpd = of_property_read_bool(dev->of_node, "no-hpd");
 	if (!panel->no_hpd) {
@@ -707,6 +735,8 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 
 		if (!panel->ddc)
 			return -EPROBE_DEFER;
+	} else if (aux) {
+		panel->ddc = &aux->ddc;
 	}
 
 	if (desc == &panel_dpi) {
@@ -742,10 +772,8 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 			desc->bpc != 8);
 		break;
 	case DRM_MODE_CONNECTOR_eDP:
-		if (desc->bus_format == 0)
-			dev_warn(dev, "Specify missing bus_format\n");
-		if (desc->bpc != 6 && desc->bpc != 8)
-			dev_warn(dev, "Expected bpc in {6,8} but got: %u\n", desc->bpc);
+		if (desc->bpc != 6 && desc->bpc != 8 && desc->bpc != 10)
+			dev_warn(dev, "Expected bpc in {6,8,10} but got: %u\n", desc->bpc);
 		break;
 	case DRM_MODE_CONNECTOR_DSI:
 		if (desc->bpc != 6 && desc->bpc != 8)
@@ -775,6 +803,11 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 		break;
 	}
 
+	if (!panel->enable_gpio && desc->delay.disable_to_power_off)
+		dev_warn(dev, "Need a delay after disabling panel GPIO, but a GPIO wasn't provided\n");
+	if (!panel->enable_gpio && desc->delay.power_to_enable)
+		dev_warn(dev, "Need a delay before enabling panel GPIO, but a GPIO wasn't provided\n");
+
 	dev_set_drvdata(dev, panel);
 
 	/*
@@ -793,6 +826,15 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 	if (err)
 		goto disable_pm_runtime;
 
+	if (!panel->base.backlight && panel->aux) {
+		pm_runtime_get_sync(dev);
+		err = drm_panel_dp_aux_backlight(&panel->base, panel->aux);
+		pm_runtime_mark_last_busy(dev);
+		pm_runtime_put_autosuspend(dev);
+		if (err)
+			goto disable_pm_runtime;
+	}
+
 	drm_panel_add(&panel->base);
 
 	return 0;
@@ -801,7 +843,7 @@ disable_pm_runtime:
 	pm_runtime_dont_use_autosuspend(dev);
 	pm_runtime_disable(dev);
 free_ddc:
-	if (panel->ddc)
+	if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc))
 		put_device(&panel->ddc->dev);
 
 	return err;
@@ -817,7 +859,7 @@ static int panel_simple_remove(struct device *dev)
 
 	pm_runtime_dont_use_autosuspend(dev);
 	pm_runtime_disable(dev);
-	if (panel->ddc)
+	if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc))
 		put_device(&panel->ddc->dev);
 
 	return 0;
@@ -1179,6 +1221,8 @@ static const struct panel_desc auo_g104sn02 = {
 		.width = 211,
 		.height = 158,
 	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
+	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
 static const struct drm_display_mode auo_g121ean01_mode = {
@@ -1929,6 +1973,32 @@ static const struct panel_desc edt_et035012dm6 = {
 	.bus_flags = DRM_BUS_FLAG_DE_LOW | DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE,
 };
 
+static const struct drm_display_mode edt_etm0350g0dh6_mode = {
+	.clock = 6520,
+	.hdisplay = 320,
+	.hsync_start = 320 + 20,
+	.hsync_end = 320 + 20 + 68,
+	.htotal = 320 + 20 + 68,
+	.vdisplay = 240,
+	.vsync_start = 240 + 4,
+	.vsync_end = 240 + 4 + 18,
+	.vtotal = 240 + 4 + 18,
+	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+};
+
+static const struct panel_desc edt_etm0350g0dh6 = {
+	.modes = &edt_etm0350g0dh6_mode,
+	.num_modes = 1,
+	.bpc = 6,
+	.size = {
+		.width = 70,
+		.height = 53,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
+	.connector_type = DRM_MODE_CONNECTOR_DPI,
+};
+
 static const struct drm_display_mode edt_etm043080dh6gp_mode = {
 	.clock = 10870,
 	.hdisplay = 480,
@@ -1980,6 +2050,9 @@ static const struct panel_desc edt_etm0430g0dh6 = {
 		.width = 95,
 		.height = 54,
 	},
+	.bus_format = MEDIA_BUS_FMT_RGB666_1X18,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE,
+	.connector_type = DRM_MODE_CONNECTOR_DPI,
 };
 
 static const struct drm_display_mode edt_et057090dhu_mode = {
@@ -2044,6 +2117,33 @@ static const struct panel_desc edt_etm0700g0bdh6 = {
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB666_1X18,
 	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.connector_type = DRM_MODE_CONNECTOR_DPI,
+};
+
+static const struct drm_display_mode edt_etmv570g2dhu_mode = {
+	.clock = 25175,
+	.hdisplay = 640,
+	.hsync_start = 640,
+	.hsync_end = 640 + 16,
+	.htotal = 640 + 16 + 30 + 114,
+	.vdisplay = 480,
+	.vsync_start = 480 + 10,
+	.vsync_end = 480 + 10 + 3,
+	.vtotal = 480 + 10 + 3 + 35,
+	.flags = DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_PHSYNC,
+};
+
+static const struct panel_desc edt_etmv570g2dhu = {
+	.modes = &edt_etmv570g2dhu_mode,
+	.num_modes = 1,
+	.bpc = 6,
+	.size = {
+		.width = 115,
+		.height = 86,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
+	.connector_type = DRM_MODE_CONNECTOR_DPI,
 };
 
 static const struct display_timing evervision_vgg804821_timing = {
@@ -3521,6 +3621,36 @@ static const struct panel_desc rocktech_rk101ii01d_ct = {
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
+static const struct drm_display_mode samsung_atna33xc20_mode = {
+	.clock = 138770,
+	.hdisplay = 1920,
+	.hsync_start = 1920 + 48,
+	.hsync_end = 1920 + 48 + 32,
+	.htotal = 1920 + 48 + 32 + 80,
+	.vdisplay = 1080,
+	.vsync_start = 1080 + 8,
+	.vsync_end = 1080 + 8 + 8,
+	.vtotal = 1080 + 8 + 8 + 16,
+	.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
+};
+
+static const struct panel_desc samsung_atna33xc20 = {
+	.modes = &samsung_atna33xc20_mode,
+	.num_modes = 1,
+	.bpc = 10,
+	.size = {
+		.width = 294,
+		.height = 165,
+	},
+	.delay = {
+		.disable_to_power_off = 200,
+		.power_to_enable = 400,
+		.hpd_absent_delay = 200,
+		.unprepare = 500,
+	},
+	.connector_type = DRM_MODE_CONNECTOR_eDP,
+};
+
 static const struct drm_display_mode samsung_lsn122dl01_c01_mode = {
 	.clock = 271560,
 	.hdisplay = 2560,
@@ -4330,6 +4460,9 @@ static const struct of_device_id platform_of_match[] = {
 		.compatible = "edt,et035012dm6",
 		.data = &edt_et035012dm6,
 	}, {
+		.compatible = "edt,etm0350g0dh6",
+		.data = &edt_etm0350g0dh6,
+	}, {
 		.compatible = "edt,etm043080dh6gp",
 		.data = &edt_etm043080dh6gp,
 	}, {
@@ -4351,6 +4484,9 @@ static const struct of_device_id platform_of_match[] = {
 		.compatible = "edt,etm0700g0edh6",
 		.data = &edt_etm0700g0bdh6,
 	}, {
+		.compatible = "edt,etmv570g2dhu",
+		.data = &edt_etmv570g2dhu,
+	}, {
 		.compatible = "evervision,vgg804821",
 		.data = &evervision_vgg804821,
 	}, {
@@ -4522,6 +4658,9 @@ static const struct of_device_id platform_of_match[] = {
 		.compatible = "rocktech,rk101ii01d-ct",
 		.data = &rocktech_rk101ii01d_ct,
 	}, {
+		.compatible = "samsung,atna33xc20",
+		.data = &samsung_atna33xc20,
+	}, {
 		.compatible = "samsung,lsn122dl01-c01",
 		.data = &samsung_lsn122dl01_c01,
 	}, {
@@ -4632,7 +4771,7 @@ static int panel_simple_platform_probe(struct platform_device *pdev)
 	if (!id)
 		return -ENODEV;
 
-	return panel_simple_probe(&pdev->dev, id->data);
+	return panel_simple_probe(&pdev->dev, id->data, NULL);
 }
 
 static int panel_simple_platform_remove(struct platform_device *pdev)
@@ -4912,7 +5051,7 @@ static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
 
 	desc = id->data;
 
-	err = panel_simple_probe(&dsi->dev, &desc->desc);
+	err = panel_simple_probe(&dsi->dev, &desc->desc, NULL);
 	if (err < 0)
 		return err;
 
@@ -4957,6 +5096,38 @@ static struct mipi_dsi_driver panel_simple_dsi_driver = {
 	.shutdown = panel_simple_dsi_shutdown,
 };
 
+static int panel_simple_dp_aux_ep_probe(struct dp_aux_ep_device *aux_ep)
+{
+	const struct of_device_id *id;
+
+	id = of_match_node(platform_of_match, aux_ep->dev.of_node);
+	if (!id)
+		return -ENODEV;
+
+	return panel_simple_probe(&aux_ep->dev, id->data, aux_ep->aux);
+}
+
+static void panel_simple_dp_aux_ep_remove(struct dp_aux_ep_device *aux_ep)
+{
+	panel_simple_remove(&aux_ep->dev);
+}
+
+static void panel_simple_dp_aux_ep_shutdown(struct dp_aux_ep_device *aux_ep)
+{
+	panel_simple_shutdown(&aux_ep->dev);
+}
+
+static struct dp_aux_ep_driver panel_simple_dp_aux_ep_driver = {
+	.driver = {
+		.name = "panel-simple-dp-aux",
+		.of_match_table = platform_of_match,	/* Same as platform one! */
+		.pm = &panel_simple_pm_ops,
+	},
+	.probe = panel_simple_dp_aux_ep_probe,
+	.remove = panel_simple_dp_aux_ep_remove,
+	.shutdown = panel_simple_dp_aux_ep_shutdown,
+};
+
 static int __init panel_simple_init(void)
 {
 	int err;
@@ -4965,15 +5136,25 @@ static int __init panel_simple_init(void)
 	if (err < 0)
 		return err;
 
+	err = dp_aux_dp_driver_register(&panel_simple_dp_aux_ep_driver);
+	if (err < 0)
+		goto err_did_platform_register;
+
 	if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
 		err = mipi_dsi_driver_register(&panel_simple_dsi_driver);
-		if (err < 0) {
-			platform_driver_unregister(&panel_simple_platform_driver);
-			return err;
-		}
+		if (err < 0)
+			goto err_did_aux_ep_register;
 	}
 
 	return 0;
+
+err_did_aux_ep_register:
+	dp_aux_dp_driver_unregister(&panel_simple_dp_aux_ep_driver);
+
+err_did_platform_register:
+	platform_driver_unregister(&panel_simple_platform_driver);
+
+	return err;
 }
 module_init(panel_simple_init);
 
@@ -4982,6 +5163,7 @@ static void __exit panel_simple_exit(void)
 	if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
 		mipi_dsi_driver_unregister(&panel_simple_dsi_driver);
 
+	dp_aux_dp_driver_unregister(&panel_simple_dp_aux_ep_driver);
 	platform_driver_unregister(&panel_simple_platform_driver);
 }
 module_exit(panel_simple_exit);