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From: Pengyu Luo <mitltlatltl@gmail.com>
To: Neil Armstrong <neil.armstrong@linaro.org>,
	Jessica Zhang <jesszhan0024@gmail.com>,
	David Airlie <airlied@gmail.com>,
	Simona Vetter <simona@ffwll.ch>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>
Cc: dri-devel@lists.freedesktop.org,
	devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Pengyu Luo <mitltlatltl@gmail.com>
Subject: [PATCH v3 2/2] drm/panel: Add Himax HX83121A panel driver
Date: Sun, 15 Mar 2026 22:45:36 +0800
Message-ID: <20260315144536.515032-3-mitltlatltl@gmail.com>
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Add a driver for panels using the Himax HX83121A Display Driver IC,
including support for the BOE/CSOT PPC357DB1-4, found in HUAWEI
Matebook E Go series (Gaokun2/3).

Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
---
v3:
- use backlight_enable instead of backlight_update_status to avoid NULL ptr
---
 drivers/gpu/drm/panel/Kconfig                |  11 +
 drivers/gpu/drm/panel/Makefile               |   1 +
 drivers/gpu/drm/panel/panel-himax-hx83121a.c | 749 +++++++++++++++++++
 3 files changed, 761 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-himax-hx83121a.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index a99f2e2a49..c18ff46e2e 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -203,6 +203,17 @@ config DRM_PANEL_HIMAX_HX83112B
 	  Say Y here if you want to enable support for Himax HX83112B-based
 	  display panels, such as the one found in the Fairphone 3 smartphone.
=20
+config DRM_PANEL_HIMAX_HX83121A
+	tristate "Himax HX83121A-based DSI panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	select DRM_KMS_HELPER
+	help
+	  Say Y here if you want to enable support for Himax HX83121A-based
+	  display panels, such as the one found in the HUAWEI Matebook E Go
+          series.
+
 config DRM_PANEL_HIMAX_HX8394
 	tristate "HIMAX HX8394 MIPI-DSI LCD panels"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 3336a2c0cd..372d67b8cc 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_DRM_PANEL_HIMAX_HX8279) +=3D panel-himax-hx8=
279.o
 obj-$(CONFIG_DRM_PANEL_HIMAX_HX83102) +=3D panel-himax-hx83102.o
 obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112A) +=3D panel-himax-hx83112a.o
 obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112B) +=3D panel-himax-hx83112b.o
+obj-$(CONFIG_DRM_PANEL_HIMAX_HX83121A) +=3D panel-himax-hx83121a.o
 obj-$(CONFIG_DRM_PANEL_HIMAX_HX8394) +=3D panel-himax-hx8394.o
 obj-$(CONFIG_DRM_PANEL_HYDIS_HV101HD1) +=3D panel-hydis-hv101hd1.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) +=3D panel-ilitek-ili9322.o
diff --git a/drivers/gpu/drm/panel/panel-himax-hx83121a.c b/drivers/gpu/drm=
/panel/panel-himax-hx83121a.c
new file mode 100644
index 0000000000..ebe643ba41
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-himax-hx83121a.c
@@ -0,0 +1,749 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Himax HX83121A DriverIC panels driver
+ * Copyright (c) 2024-2026 Pengyu Luo <mitltlatltl@gmail.com>
+ *
+ * Multiple panels handling based on panel-novatek-nt36523.c
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/display/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+static bool enable_dsc;
+module_param(enable_dsc, bool, 0);
+MODULE_PARM_DESC(enable_dsc, "enable DSC on the panel (default: false)");
+
+struct himax {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi[2];
+	const struct panel_desc *desc;
+	struct drm_dsc_config dsc;
+	struct gpio_desc *reset_gpio;
+	struct regulator_bulk_data *supplies;
+	struct backlight_device *backlight;
+};
+
+struct panel_desc {
+	unsigned int width_mm;
+	unsigned int height_mm;
+	unsigned int bpc;
+	unsigned int lanes;
+	enum mipi_dsi_pixel_format format;
+	unsigned long mode_flags;
+	const struct drm_dsc_config *dsc_cfg;
+	const struct drm_display_mode *dsc_modes;
+	unsigned int num_dsc_modes;
+
+	const struct drm_display_mode *modes;
+	unsigned int num_modes;
+
+	int (*init_sequence_dsc)(struct mipi_dsi_multi_context *dsi_ctx);
+	int (*init_sequence)(struct mipi_dsi_multi_context *dsi_ctx);
+
+	bool is_dual_dsi;
+	bool has_dcs_backlight;
+};
+
+static const struct regulator_bulk_data himax_supplies[] =3D {
+	{ .supply =3D "vddi" },
+	{ .supply =3D "avdd" },
+	{ .supply =3D "avee" },
+};
+
+static inline struct himax *to_himax(struct drm_panel *panel)
+{
+	return container_of(panel, struct himax, panel);
+}
+
+static inline struct mipi_dsi_device *to_primary_dsi(struct himax *ctx)
+{
+	/* Sync on DSI1 for dual dsi */
+	return ctx->desc->is_dual_dsi ? ctx->dsi[1] : ctx->dsi[0];
+}
+
+static void himax_reset(struct himax *ctx)
+{
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(4000, 4100);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	msleep(20);
+}
+
+static int himax_prepare(struct drm_panel *panel)
+{
+	struct himax *ctx =3D to_himax(panel);
+	struct mipi_dsi_device *dsi =3D to_primary_dsi(ctx);
+	struct mipi_dsi_multi_context dsi_ctx =3D { .dsi =3D dsi };
+	struct drm_dsc_picture_parameter_set pps;
+	int ret;
+
+	ret =3D regulator_bulk_enable(ARRAY_SIZE(himax_supplies),
+				    ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	himax_reset(ctx);
+
+	if (enable_dsc && ctx->desc->init_sequence_dsc)
+		ret =3D ctx->desc->init_sequence_dsc(&dsi_ctx);
+	else if (ctx->desc->init_sequence)
+		ret =3D ctx->desc->init_sequence(&dsi_ctx);
+	else
+		ret =3D -EOPNOTSUPP;
+
+	if (ret < 0) {
+		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+		regulator_bulk_disable(ARRAY_SIZE(himax_supplies),
+				       ctx->supplies);
+		return ret;
+	}
+
+	if (enable_dsc) {
+		drm_dsc_pps_payload_pack(&pps, &ctx->dsc);
+		mipi_dsi_picture_parameter_set_multi(&dsi_ctx, &pps);
+		mipi_dsi_compression_mode_multi(&dsi_ctx, true);
+	}
+
+	return backlight_enable(ctx->backlight);
+}
+
+static int himax_off(struct mipi_dsi_multi_context *dsi_ctx)
+{
+	mipi_dsi_dcs_enter_sleep_mode_multi(dsi_ctx);
+	mipi_dsi_msleep(dsi_ctx, 120);
+
+	return dsi_ctx->accum_err;
+}
+
+static int himax_unprepare(struct drm_panel *panel)
+{
+	struct himax *ctx =3D to_himax(panel);
+	struct mipi_dsi_device *dsi =3D to_primary_dsi(ctx);
+	struct mipi_dsi_multi_context dsi_ctx =3D { .dsi =3D dsi };
+	struct device *dev =3D &dsi->dev;
+	int ret;
+
+	ret =3D himax_off(&dsi_ctx);
+	if (ret < 0)
+		dev_err(dev, "panel failed to off: %d\n", ret);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(himax_supplies), ctx->supplies);
+
+	return 0;
+}
+
+static int himax_get_modes(struct drm_panel *panel,
+			   struct drm_connector *connector)
+{
+	struct himax *ctx =3D to_himax(panel);
+	const struct panel_desc *desc =3D ctx->desc;
+	const struct drm_display_mode *modes;
+	int num_modes;
+	int i;
+
+	modes =3D enable_dsc ? desc->dsc_modes : desc->modes;
+	num_modes =3D enable_dsc ? desc->num_dsc_modes : desc->num_modes;
+
+	for (i =3D 0; i < num_modes; i++) {
+		const struct drm_display_mode *m =3D &modes[i];
+		struct drm_display_mode *mode;
+
+		mode =3D drm_mode_duplicate(connector->dev, m);
+		if (!mode) {
+			dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
+				m->hdisplay, m->vdisplay, drm_mode_vrefresh(m));
+			return -ENOMEM;
+		}
+
+		mode->type =3D DRM_MODE_TYPE_DRIVER;
+		if (i =3D=3D 0)
+			mode->type |=3D DRM_MODE_TYPE_PREFERRED;
+
+		drm_mode_set_name(mode);
+		drm_mode_probed_add(connector, mode);
+	}
+
+	connector->display_info.width_mm =3D desc->width_mm;
+	connector->display_info.height_mm =3D desc->height_mm;
+	connector->display_info.bpc =3D desc->bpc;
+
+	return num_modes;
+}
+
+static const struct drm_panel_funcs himax_panel_funcs =3D {
+	.prepare =3D himax_prepare,
+	.unprepare =3D himax_unprepare,
+	.get_modes =3D himax_get_modes,
+};
+
+static int himax_bl_update_status(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi =3D bl_get_data(bl);
+	u16 brightness =3D backlight_get_brightness(bl);
+	/* TODO: brightness to raw map table */
+	return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
+}
+
+static const struct backlight_ops himax_bl_ops =3D {
+	.options =3D BL_CORE_SUSPENDRESUME,
+	.update_status =3D himax_bl_update_status,
+};
+
+static struct backlight_device *
+himax_create_backlight(struct mipi_dsi_device *dsi)
+{
+	struct device *dev =3D &dsi->dev;
+	const struct backlight_properties props =3D {
+		.type =3D BACKLIGHT_RAW,
+		.brightness =3D 512,
+		.max_brightness =3D 4095,
+		.scale =3D BACKLIGHT_SCALE_NON_LINEAR,
+	};
+
+	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+					      &himax_bl_ops, &props);
+}
+
+static int boe_ppc357db1_4_dsc_init_seq(struct mipi_dsi_multi_context *dsi=
_ctx)
+{
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0x83, 0x12, 0x1a, 0x55, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2=
4);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe2, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe1, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc7);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2, 0x98);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x02);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe7,
+				     0x01, 0x07, 0x01, 0x07, 0x01, 0x07, 0x06, 0x06,
+				     0x06, 0x16, 0x00, 0x16, 0x81, 0x02, 0x40, 0x00,
+				     0x1a, 0x4a, 0x05, 0x04, 0x03, 0x02, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc6);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd2, 0x00, 0x30);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc9);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd3, 0x04);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc6);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe2, 0x42);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xd0);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2, 0xf5);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xcd,
+				     0x81, 0x00, 0x80, 0x77, 0x00, 0x01, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe4,
+				     0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1,
+				     0xc7, 0xb2, 0xa0, 0x90, 0x81, 0x75, 0x69, 0x5f,
+				     0x55, 0x4c, 0x44, 0x3d, 0x36, 0x2f, 0x2a, 0x24,
+				     0x1e, 0x19, 0x14, 0x10, 0x09, 0x08, 0x07, 0x54,
+				     0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe4,
+				     0xaa, 0xd4, 0xff, 0x2a, 0x55, 0x7f, 0xaa, 0xd4,
+				     0xff, 0xea, 0xff, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc8);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb1, 0x25);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbe, 0x01, 0x35, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd9, 0x5f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0x00, 0x00, 0x00);
+
+	mipi_dsi_dcs_exit_sleep_mode_multi(dsi_ctx);
+	mipi_dsi_msleep(dsi_ctx, 140);
+	mipi_dsi_dcs_set_display_on_multi(dsi_ctx);
+
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2=
4);
+	mipi_dsi_msleep(dsi_ctx, 20);
+
+	return dsi_ctx->accum_err;
+}
+
+static int boe_ppc357db1_4_init_seq(struct mipi_dsi_multi_context *dsi_ctx)
+{
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0x83, 0x12, 0x1a, 0x55, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2=
4);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd1, 0x37, 0x03, 0x0c, 0xfd);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe2, 0x20);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe1, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc7);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2, 0xa6);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x02);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe7,
+				     0x01, 0x07, 0x01, 0x07, 0x01, 0x07, 0x06, 0x06,
+				     0x06, 0x16, 0x00, 0x16, 0x81, 0x02, 0x40, 0x00,
+				     0x1a, 0x4a, 0x05, 0x04, 0x03, 0x02, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe2,
+				     0x02, 0x68, 0x02, 0x68, 0x02, 0x68, 0x02, 0x68,
+				     0x02, 0x6f, 0x03, 0x04, 0x2d, 0x09, 0x09, 0x00,
+				     0x00, 0x0f, 0x0f, 0x0f, 0x0f, 0x00, 0x00, 0x00,
+				     0x01, 0x10, 0x10, 0x1c, 0x25, 0x3c, 0x00, 0x23,
+				     0x5d, 0x02, 0x02, 0x00, 0x00, 0x58, 0x01, 0xac,
+				     0x0f, 0xa9, 0x10, 0x00, 0x2d, 0x6f, 0x00, 0x70,
+				     0x00, 0x0a, 0xcb, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc6);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd2, 0x09, 0x85);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc9);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd3, 0x04);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xd0);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2, 0xf5);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe4,
+				     0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1,
+				     0xc7, 0xb2, 0xa0, 0x90, 0x81, 0x75, 0x69, 0x5f,
+				     0x55, 0x4c, 0x44, 0x3d, 0x36, 0x2f, 0x2a, 0x24,
+				     0x1e, 0x19, 0x14, 0x10, 0x09, 0x08, 0x07, 0x54,
+				     0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe4,
+				     0xaa, 0xd4, 0xff, 0x2a, 0x55, 0x7f, 0xaa, 0xd4,
+				     0xff, 0xea, 0xff, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc8);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb1, 0x25);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbe, 0x01, 0x35, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd9, 0x5f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0x00, 0x00, 0x00);
+
+	mipi_dsi_dcs_exit_sleep_mode_multi(dsi_ctx);
+	mipi_dsi_msleep(dsi_ctx, 140);
+	mipi_dsi_dcs_set_display_on_multi(dsi_ctx);
+
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2=
4);
+	mipi_dsi_msleep(dsi_ctx, 31);
+
+	return dsi_ctx->accum_err;
+}
+
+static int csot_ppc357db1_4_dsc_init_seq(struct mipi_dsi_multi_context *ds=
i_ctx)
+{
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0x83, 0x12, 0x1a, 0x55, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2=
4);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb1,
+				     0x1c, 0x6b, 0x6b, 0x27, 0xe7, 0x00, 0x1b, 0x25,
+				     0x21, 0x21, 0x2d, 0x2d, 0x17, 0x33, 0x31, 0x40,
+				     0xcd, 0xff, 0x1a, 0x05, 0x15, 0x98, 0x00, 0x88,
+				     0x7f, 0xff, 0xff, 0xcf, 0x1a, 0xcc, 0x02, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd1, 0x37, 0x03, 0x0c, 0xfd);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2,
+				     0x00, 0x6a, 0x40, 0x00, 0x00, 0x14, 0x98, 0x60,
+				     0x3c, 0x02, 0x80, 0x21, 0x21, 0x00, 0x00, 0xf0,
+				     0x27);
+	/*
+	 * NOTE: Register 0xE2 configuration (based on downstream reference):
+	 * - 0x00: 120Hz with DSC enabled
+	 * - 0x10: 60Hz with DSC enabled
+	 * - 0x20: 60Hz with DSC disabled
+	 *
+	 * Both 0x00 and 0x10 are compatible with 60Hz/120Hz when DSC is active.
+	 * We use a fixed DSC-on value to remain refresh-rate agnostic.
+	 */
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe2, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xc0, 0x23, 0x23, 0xcc, 0x22, 0x99,=
 0xd8);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb4,
+				     0x46, 0x06, 0x0c, 0xbe, 0x0c, 0xbe, 0x09, 0x46,
+				     0x0f, 0x57, 0x0f, 0x57, 0x03, 0x4a, 0x00, 0x00,
+				     0x04, 0x0c, 0x00, 0x18, 0x01, 0x06, 0x08, 0x00,
+				     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				     0x00, 0x00, 0xff, 0x00, 0xff, 0x10, 0x00, 0x02,
+				     0x14, 0x14, 0x14, 0x14);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe1, 0x01, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xe2);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe7, 0x49);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd3,
+				     0x00, 0xc0, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04,
+				     0x16, 0x02, 0x07, 0x07, 0x07, 0x31, 0x13, 0x19,
+				     0x12, 0x12, 0x03, 0x03, 0x03, 0x32, 0x10, 0x18,
+				     0x00, 0x11, 0x32, 0x10, 0x03, 0x00, 0x03, 0x32,
+				     0x10, 0x03, 0x00, 0x03, 0x00, 0x00, 0xff, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe1,
+				     0x11, 0x00, 0x00, 0x89, 0x30, 0x80, 0x0a, 0x00,
+				     0x03, 0x20, 0x00, 0x14, 0x03, 0x20, 0x03, 0x20,
+				     0x02, 0x00, 0x02, 0x91, 0x00, 0x20, 0x02, 0x47,
+				     0x00, 0x0b, 0x00, 0x0c, 0x05, 0x0e, 0x03, 0x68,
+				     0x18, 0x00, 0x10, 0xe0, 0x03, 0x0c, 0x20, 0x00,
+				     0x06, 0x0b, 0x0b, 0x33, 0x0e, 0x1c, 0x2a, 0x38,
+				     0x46, 0x54, 0x62, 0x69, 0x70, 0x77, 0x79, 0x7b,
+				     0x7d, 0x7e, 0x01, 0x02, 0x01, 0x00, 0x09);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe7,
+				     0x17, 0x08, 0x08, 0x2c, 0x46, 0x1e, 0x02, 0x23,
+				     0x5d, 0x02, 0xc9, 0x00, 0x00, 0x00, 0x00, 0x12,
+				     0x05, 0x02, 0x02, 0x07, 0x10, 0x10, 0x00, 0x1d,
+				     0xb9, 0x23, 0xb9, 0x00, 0x33, 0x02, 0x88);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe7,
+				     0x02, 0x00, 0xb2, 0x01, 0x56, 0x07, 0x56, 0x08,
+				     0x48, 0x14, 0xfd, 0x26);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x02);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe7,
+				     0x08, 0x08, 0x01, 0x03, 0x01, 0x03, 0x07, 0x02,
+				     0x02, 0x47, 0x00, 0x47, 0x81, 0x02, 0x40, 0x00,
+				     0x18, 0x4a, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01,
+				     0x00, 0x00, 0x03, 0x02, 0x01, 0x00, 0x00, 0x00,
+				     0x00, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbf,
+				     0xfd, 0x00, 0x80, 0x9c, 0x36, 0x00, 0x81, 0x0c);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xcd,
+				     0x81, 0x00, 0x80, 0x77, 0x00, 0x01, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe4,
+				     0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1,
+				     0xc7, 0xb2, 0xa0, 0x90, 0x81, 0x75, 0x69, 0x5f,
+				     0x55, 0x4c, 0x44, 0x3d, 0x36, 0x2f, 0x2a, 0x24,
+				     0x1e, 0x19, 0x14, 0x10, 0x09, 0x08, 0x07, 0x54,
+				     0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe4,
+				     0xaa, 0xd4, 0xff, 0x2a, 0x55, 0x7f, 0xaa, 0xd4,
+				     0xff, 0xea, 0xff, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbe, 0x01, 0x35, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd9, 0x5f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0x00, 0x00, 0x00);
+
+	mipi_dsi_dcs_exit_sleep_mode_multi(dsi_ctx);
+	mipi_dsi_msleep(dsi_ctx, 140);
+	mipi_dsi_dcs_set_display_on_multi(dsi_ctx);
+
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2=
4);
+	mipi_dsi_msleep(dsi_ctx, 20);
+
+	return dsi_ctx->accum_err;
+}
+
+static int csot_ppc357db1_4_init_seq(struct mipi_dsi_multi_context *dsi_ct=
x)
+{
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0x83, 0x12, 0x1a, 0x55, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2=
4);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb1,
+				     0x1c, 0x6b, 0x6b, 0x27, 0xe7, 0x00, 0x1b, 0x11,
+				     0x21, 0x21, 0x2d, 0x2d, 0x17, 0x33, 0x31, 0x40,
+				     0xcd, 0xff, 0x1a, 0x05, 0x15, 0x98, 0x00, 0x88,
+				     0x7f, 0xff, 0xff, 0xcf, 0x1a, 0xcc, 0x02, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd1, 0x37, 0x03, 0x0c, 0xfd);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe2, 0x20);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2,
+				     0x00, 0x6a, 0x40, 0x00, 0x00, 0x14, 0x98, 0x60,
+				     0x3c, 0x02, 0x80, 0x21, 0x21, 0x00, 0x00, 0x10,
+				     0x27);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe1, 0x00, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xe2);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe7, 0x49);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd3,
+				     0x00, 0xc0, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04,
+				     0x16, 0x02, 0x07, 0x07, 0x07, 0x31, 0x13, 0x16,
+				     0x12, 0x12, 0x03, 0x03, 0x03, 0x32, 0x10, 0x15,
+				     0x00, 0x11, 0x32, 0x10, 0x03, 0x00, 0x03, 0x32,
+				     0x10, 0x03, 0x00, 0x03, 0x00, 0x00, 0xff, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x02);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe2,
+				     0x80, 0x05, 0x1c, 0xbe, 0x09, 0x8d, 0x0f, 0x57,
+				     0x03, 0x87, 0x06, 0x10, 0x32, 0x06, 0x15, 0x00,
+				     0x00, 0x14, 0x14, 0x14, 0x14, 0x00, 0x00, 0x00,
+				     0x01, 0x10, 0x10, 0x16, 0x28, 0x3c, 0x03, 0x23,
+				     0x5d, 0x02, 0x02, 0x00, 0x00, 0x48, 0x01, 0xac,
+				     0x0f, 0xab, 0x10, 0x00, 0x32, 0x87, 0x00, 0xa1,
+				     0x00, 0x0a, 0xcb, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe7,
+				     0x02, 0x00, 0xb2, 0x01, 0x56, 0x07, 0x56, 0x08,
+				     0x48, 0x14, 0x00, 0x26);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x02);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe7,
+				     0x05, 0x05, 0x01, 0x05, 0x01, 0x05, 0x04, 0x04,
+				     0x04, 0x24, 0x00, 0x24, 0x81, 0x02, 0x40, 0x00,
+				     0x32, 0x87, 0x03, 0x02, 0x01, 0x00, 0x00, 0x00,
+				     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				     0x00, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xd0);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb2, 0xf0);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbf,
+				     0xfd, 0x00, 0x80, 0x9c, 0x10, 0x00, 0x81, 0x0c);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe4,
+				     0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1,
+				     0xc7, 0xb2, 0xa0, 0x90, 0x81, 0x75, 0x69, 0x5f,
+				     0x55, 0x4c, 0x44, 0x3d, 0x36, 0x2f, 0x2a, 0x24,
+				     0x1e, 0x19, 0x14, 0x10, 0x09, 0x08, 0x07, 0x54,
+				     0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe4,
+				     0xaa, 0xd4, 0xff, 0x2a, 0x55, 0x7f, 0xaa, 0xd4,
+				     0xff, 0xea, 0xff, 0x03);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0xc8);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb1, 0x25);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe9, 0x3f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xbe, 0x01, 0x35, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xd9, 0x5f);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xb9, 0x00, 0x00, 0x00);
+
+	mipi_dsi_dcs_exit_sleep_mode_multi(dsi_ctx);
+	mipi_dsi_msleep(dsi_ctx, 140);
+	mipi_dsi_dcs_set_display_on_multi(dsi_ctx);
+
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x01);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2=
4);
+	mipi_dsi_msleep(dsi_ctx, 31);
+
+	return dsi_ctx->accum_err;
+}
+
+static struct drm_dsc_config ppc357db1_4_dsc_cfg =3D {
+	.dsc_version_major =3D 1,
+	.dsc_version_minor =3D 1,
+	.slice_height =3D 20,
+	.slice_width =3D 800,
+	.slice_count =3D 1,
+	.bits_per_component =3D 8,
+	.bits_per_pixel =3D 8 << 4,
+	.block_pred_enable =3D true,
+};
+
+static const struct drm_display_mode ppc357db1_4_dsc_modes[] =3D {
+	{
+		.clock =3D (800 + 60 + 40 + 40) * 2 * (2560 + 154 + 4 + 18) * 120 / 1000,
+		.hdisplay =3D 800 * 2,
+		.hsync_start =3D (800 + 60) * 2,
+		.hsync_end =3D (800 + 60 + 40) * 2,
+		.htotal =3D (800 + 60 + 40 + 40) * 2,
+		.vdisplay =3D 2560,
+		.vsync_start =3D 2560 + 154,
+		.vsync_end =3D 2560 + 154 + 4,
+		.vtotal =3D 2560 + 154 + 4 + 18,
+	},
+	{
+		.clock =3D (800 + 60 + 40 + 40) * 2 * (2560 + 2890 + 4 + 18) * 60 / 1000,
+		.hdisplay =3D 800 * 2,
+		.hsync_start =3D (800 + 60) * 2,
+		.hsync_end =3D (800 + 60 + 40) * 2,
+		.htotal =3D (800 + 60 + 40 + 40) * 2,
+		.vdisplay =3D 2560,
+		.vsync_start =3D 2560 + 2890,
+		.vsync_end =3D 2560 + 2890 + 4,
+		.vtotal =3D 2560 + 2890 + 4 + 18,
+	},
+};
+
+static const struct drm_display_mode ppc357db1_4_modes[] =3D {
+	{
+		.clock =3D (800 + 60 + 20 + 40) * 2 * (2560 + 154 + 4 + 18) * 60 / 1000,
+		.hdisplay =3D 800 * 2,
+		.hsync_start =3D (800 + 60) * 2,
+		.hsync_end =3D (800 + 60 + 20) * 2,
+		.htotal =3D (800 + 60 + 20 + 40) * 2,
+		.vdisplay =3D 2560,
+		.vsync_start =3D 2560 + 168,
+		.vsync_end =3D 2560 + 168 + 4,
+		.vtotal =3D 2560 + 168 + 4 + 18,
+	},
+};
+
+static int himax_probe(struct mipi_dsi_device *dsi)
+{
+	struct mipi_dsi_device_info dsi_info =3D {"dsi-secondary", 0, NULL};
+	struct mipi_dsi_host *dsi1_host;
+	struct device *dev =3D &dsi->dev;
+	const struct panel_desc *desc;
+	struct device_node *dsi1;
+	struct himax *ctx;
+	int num_dsi =3D 1;
+	int ret, i;
+
+	ctx =3D devm_drm_panel_alloc(dev, struct himax, panel, &himax_panel_funcs,
+				   DRM_MODE_CONNECTOR_DSI);
+	if (!ctx)
+		return -ENOMEM;
+
+	ret =3D devm_regulator_bulk_get_const(&dsi->dev,
+					    ARRAY_SIZE(himax_supplies),
+					    himax_supplies, &ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	ctx->reset_gpio =3D devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(ctx->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
+				     "Failed to get reset-gpios\n");
+
+	desc =3D of_device_get_match_data(dev);
+	if (!desc)
+		return -ENODEV;
+	ctx->desc =3D desc;
+	ctx->dsc =3D *desc->dsc_cfg;
+
+	if (desc->is_dual_dsi) {
+		num_dsi =3D 2;
+		dsi1 =3D of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
+		if (!dsi1) {
+			dev_err(dev, "cannot get secondary DSI node.\n");
+			return -ENODEV;
+		}
+
+		dsi1_host =3D of_find_mipi_dsi_host_by_node(dsi1);
+		of_node_put(dsi1);
+		if (!dsi1_host)
+			return dev_err_probe(dev, -EPROBE_DEFER,
+					     "cannot get secondary DSI host\n");
+
+		ctx->dsi[1] =3D devm_mipi_dsi_device_register_full(dev, dsi1_host,
+								 &dsi_info);
+		if (IS_ERR(ctx->dsi[1])) {
+			dev_err(dev, "cannot get secondary DSI device\n");
+			return PTR_ERR(ctx->dsi[1]);
+		}
+
+		mipi_dsi_set_drvdata(ctx->dsi[1], ctx);
+	}
+
+	ctx->dsi[0] =3D dsi;
+	mipi_dsi_set_drvdata(dsi, ctx);
+
+	ctx->panel.prepare_prev_first =3D true;
+
+	if (desc->has_dcs_backlight) {
+		ctx->backlight =3D himax_create_backlight(to_primary_dsi(ctx));
+		if (IS_ERR(ctx->backlight))
+			return dev_err_probe(dev, PTR_ERR(ctx->backlight),
+					     "Failed to create backlight\n");
+	} else {
+		ret =3D drm_panel_of_backlight(&ctx->panel);
+		if (ret)
+			return dev_err_probe(dev, ret, "Failed to get backlight\n");
+	}
+
+	drm_panel_add(&ctx->panel);
+
+	for (i =3D 0; i < num_dsi; i++) {
+		ctx->dsi[i]->lanes =3D desc->lanes;
+		ctx->dsi[i]->format =3D desc->format;
+		ctx->dsi[i]->mode_flags =3D desc->mode_flags;
+		ctx->dsi[i]->dsc =3D enable_dsc ? &ctx->dsc : NULL;
+		ret =3D devm_mipi_dsi_attach(dev, ctx->dsi[i]);
+		if (ret < 0) {
+			drm_panel_remove(&ctx->panel);
+			return dev_err_probe(dev, ret,
+					     "Failed to attach to DSI host\n");
+		}
+	}
+
+	return 0;
+}
+
+static void himax_remove(struct mipi_dsi_device *dsi)
+{
+	struct himax *ctx =3D mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_remove(&ctx->panel);
+}
+
+/* Model name: BOE PPC357DB1-4 */
+static const struct panel_desc boe_ppc357db1_4_desc =3D {
+	.width_mm =3D 266,
+	.height_mm =3D 166,
+	.lanes =3D 4,
+	.format =3D MIPI_DSI_FMT_RGB888,
+	.mode_flags =3D MIPI_DSI_MODE_VIDEO | MIPI_DSI_CLOCK_NON_CONTINUOUS |
+		      MIPI_DSI_MODE_LPM,
+	.dsc_cfg =3D &ppc357db1_4_dsc_cfg,
+	.dsc_modes =3D ppc357db1_4_dsc_modes,
+	.num_dsc_modes =3D ARRAY_SIZE(ppc357db1_4_dsc_modes),
+	.modes =3D ppc357db1_4_modes,
+	.num_modes =3D ARRAY_SIZE(ppc357db1_4_modes),
+	.init_sequence_dsc =3D boe_ppc357db1_4_dsc_init_seq,
+	.init_sequence =3D boe_ppc357db1_4_init_seq,
+	.is_dual_dsi =3D true,
+	.has_dcs_backlight =3D true,
+};
+
+/* Model name: CSOT PPC357DB1-4 */
+static const struct panel_desc csot_ppc357db1_4_desc =3D {
+	.width_mm =3D 266,
+	.height_mm =3D 166,
+	.lanes =3D 4,
+	.format =3D MIPI_DSI_FMT_RGB888,
+	.mode_flags =3D MIPI_DSI_MODE_VIDEO | MIPI_DSI_CLOCK_NON_CONTINUOUS |
+		      MIPI_DSI_MODE_LPM,
+	.dsc_cfg =3D &ppc357db1_4_dsc_cfg,
+	.dsc_modes =3D ppc357db1_4_dsc_modes,
+	.num_dsc_modes =3D ARRAY_SIZE(ppc357db1_4_dsc_modes),
+	.modes =3D ppc357db1_4_modes,
+	.num_modes =3D ARRAY_SIZE(ppc357db1_4_modes),
+	.init_sequence_dsc =3D csot_ppc357db1_4_dsc_init_seq,
+	.init_sequence =3D csot_ppc357db1_4_init_seq,
+	.is_dual_dsi =3D true,
+	.has_dcs_backlight =3D true,
+};
+
+/*
+ * Known panels with HX83121A:
+ * CSOT PNC357DB1-4: on MI Book S 12.4
+ * CSOT PPC357DB1-1: on SAMSUNG Galaxy Tab S7 FE
+ * BOE/CSOT PPC357DB1-4: on HUAWEI Matebook E Go
+ * CSOT PPC357DB1-5: on MI Pad 5 Pro 12.4
+ */
+
+static const struct of_device_id himax_of_match[] =3D {
+	{ .compatible =3D "boe,ppc357db1-4", .data =3D &boe_ppc357db1_4_desc },
+	{ .compatible =3D "csot,ppc357db1-4", .data =3D &csot_ppc357db1_4_desc },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, himax_of_match);
+
+static struct mipi_dsi_driver himax_driver =3D {
+	.probe =3D himax_probe,
+	.remove =3D himax_remove,
+	.driver =3D {
+		.name =3D "panel-himax-hx83121a",
+		.of_match_table =3D himax_of_match,
+	},
+};
+module_mipi_dsi_driver(himax_driver);
+
+MODULE_AUTHOR("Pengyu Luo <mitltlatltl0@gmail.com>");
+MODULE_DESCRIPTION("Himax HX83121A DriverIC panels driver");
+MODULE_LICENSE("GPL");
--=20
2.53.0