drm/panel: Add Himax HX83121A panel driver

HX83121A is a driver IC used to drive MIPI-DSI panels. It is found in HUAWEI Matebook E Go series (Gaokun2/3) with BOE or CSOT panels.

Signed-off-by Pengyu Luo <[email protected]>

---
 .../display/panel/himax,hx83121a.yaml         | 87 +++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/himax,hx83121a.yaml

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 <[email protected]>

---
  drivers/gpu/drm/panel/Kconfig                |  11 +
  drivers/gpu/drm/panel/Makefile               |   1 +
  drivers/gpu/drm/panel/panel-himax-hx83121a.c | 752 +++++++++++++++++++
  3 files changed, 764 insertions(+)

create mode 100644 drivers/gpu/drm/panel/panel-himax-hx83121a.c

drivers/gpu/drm/panel/Kconfig +11 -0

index 7a83804fe..a60a15205 100644
@@ -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.
 
+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

drivers/gpu/drm/panel/Makefile +1 -0

index 6de894e0d..32df40712 100644
@@ -21,6 +21,7 @@ obj-$(CONFIG_DRM_PANEL_HIMAX_HX8279) += panel-himax-hx8279.o
  obj-$(CONFIG_DRM_PANEL_HIMAX_HX83102) += panel-himax-hx83102.o
  obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112A) += panel-himax-hx83112a.o
  obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112B) += panel-himax-hx83112b.o
+obj-$(CONFIG_DRM_PANEL_HIMAX_HX83121A) += panel-himax-hx83121a.o
  obj-$(CONFIG_DRM_PANEL_HIMAX_HX8394) += panel-himax-hx8394.o
  obj-$(CONFIG_DRM_PANEL_HYDIS_HV101HD1) += panel-hydis-hv101hd1.o
  obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o

drivers/gpu/drm/panel/panel-himax-hx83121a.c new file +273 -0

new file mode 100644
index 000000000..719d5ed90
@@ -0,0 +1,752 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Himax HX83121A DriverIC panels driver
+ * Copyright (c) 2024-2026 Pengyu Luo <[email protected]>
+ *
+ * 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 = false;
+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[] = {
+	{ .supply = "vddi" },
+	{ .supply = "vsp" },
+	{ .supply = "vsn" },
+};
+
+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 = to_himax(panel);
+	struct mipi_dsi_device *dsi = to_primary_dsi(ctx);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
+	struct drm_dsc_picture_parameter_set pps;
+	int ret;
+
+	ret = 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 = ctx->desc->init_sequence_dsc(&dsi_ctx);
+	else if (ctx->desc->init_sequence)
+		ret = ctx->desc->init_sequence(&dsi_ctx);
+	else
+		ret = -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_update_status(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 = to_himax(panel);
+	struct mipi_dsi_device *dsi = to_primary_dsi(ctx);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
+	struct device *dev = &dsi->dev;
+	int ret;
+
+	ret = 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 = to_himax(panel);
+	const struct panel_desc *desc = ctx->desc;
+	const struct drm_display_mode *modes;
+	int num_modes;
+	int i;
+
+	modes = enable_dsc ? desc->dsc_modes : desc->modes;
+	num_modes = enable_dsc ? desc->num_dsc_modes : desc->num_modes;
+
+	for (i = 0; i < num_modes; i++) {
+		const struct drm_display_mode *m = &modes[i];
+		struct drm_display_mode *mode;
+
+		mode = 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 = DRM_MODE_TYPE_DRIVER;
+		if (i == 0)
+			mode->type |= DRM_MODE_TYPE_PREFERRED;
+
+		drm_mode_set_name(mode);
+		drm_mode_probed_add(connector, mode);
+	}
+
+	connector->display_info.width_mm = desc->width_mm;
+	connector->display_info.height_mm = desc->height_mm;
+	connector->display_info.bpc = desc->bpc;
+
+	return num_modes;
+}
+
+static const struct drm_panel_funcs himax_panel_funcs = {
+	.prepare = himax_prepare,
+	.unprepare = himax_unprepare,
+	.get_modes = himax_get_modes,
+};
+
+static int himax_bl_update_status(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	u16 brightness = 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 = {
+	.options = BL_CORE_SUSPENDRESUME,
+	.update_status = himax_bl_update_status,
+};
+
+static struct backlight_device *
+himax_create_backlight(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	const struct backlight_properties props = {
+		.type = BACKLIGHT_RAW,
+		.brightness = 512,
+		.max_brightness = 4095,
+		.scale = BACKLIGHT_SCALE_NON_LINEAR,
+	};
+
+	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+					      &himax_bl_ops, &props);
+}
+
+static int himax_probe(struct mipi_dsi_device *dsi)
+{
+	struct mipi_dsi_device_info dsi_info = {"dsi-secondary", 0, NULL};
+	struct mipi_dsi_host *dsi1_host;
+	struct device *dev = &dsi->dev;
+	const struct panel_desc *desc;
+	struct device_node *dsi1;
+	struct himax *ctx;
+	int num_dsi = 1;
+	int ret, i;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ret = devm_regulator_bulk_get_const(&dsi->dev,
+					    ARRAY_SIZE(himax_supplies),
+					    himax_supplies, &ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	ctx->reset_gpio = 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 = of_device_get_match_data(dev);
+	if (!desc)
+		return -ENODEV;
+	ctx->desc = desc;
+	ctx->dsc = *desc->dsc_cfg;
+
+	if (desc->is_dual_dsi) {
+		num_dsi = 2;
+		dsi1 = 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 = 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] = 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]);

drivers/gpu/drm/panel/panel-himax-hx83121a.c new file +392 -0

+
+	ctx->panel.prepare_prev_first = true;
+
+	if (desc->has_dcs_backlight) {
+		ctx->backlight = 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 = 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 = 0; i < num_dsi; i++) {
+		ctx->dsi[i]->lanes = desc->lanes;
+		ctx->dsi[i]->format = desc->format;
+		ctx->dsi[i]->mode_flags = desc->mode_flags;
+		ctx->dsi[i]->dsc = enable_dsc ? &ctx->dsc : NULL;
+		ret = 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 = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_remove(&ctx->panel);
+}
+
+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, 0x24);
+	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, 0x24);
+	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, 0x24);
+	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, 0x24);
+	mipi_dsi_msleep(dsi_ctx, 31);
+
+	return dsi_ctx->accum_err;
+}
+
+static int csot_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, 0xbd, 0x00);
+	mipi_dsi_dcs_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24);
+	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, 0x24);
+	mipi_dsi_msleep(dsi_ctx, 20);
+
+	return dsi_ctx->accum_err;
+}
+
+static int csot_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, 0x24);
+	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, 0x24);
+	mipi_dsi_msleep(dsi_ctx, 31);
+
+	return dsi_ctx->accum_err;
+}
+
+static struct drm_dsc_config ppc357db1_4_dsc_cfg = {
+	.dsc_version_major = 1,
+	.dsc_version_minor = 1,
+	.slice_height = 20,
+	.slice_width = 800,
+	.slice_count = 1,
+	.bits_per_component = 8,
+	.bits_per_pixel = 8 << 4,
+	.block_pred_enable = true,
+};
+
+static const struct drm_display_mode ppc357db1_4_dsc_modes[] = {
+	{
+		.clock = (800 + 60 + 40 + 40) * 2 * (2560 + 154 + 4 + 18) * 120 / 1000,
+		.hdisplay = 800 * 2,
+		.hsync_start = (800 + 60) * 2,
+		.hsync_end = (800 + 60 + 40) * 2,
+		.htotal = (800 + 60 + 40 + 40) * 2,
+		.vdisplay = 2560,
+		.vsync_start = 2560 + 154,
+		.vsync_end = 2560 + 154 + 4,
+		.vtotal = 2560 + 154 + 4 + 18,
+	},
+	{
+		.clock = (800 + 60 + 40 + 40) * 2 * (2560 + 2890 + 4 + 18) * 60 / 1000,
+		.hdisplay = 800 * 2,
+		.hsync_start = (800 + 60) * 2,
+		.hsync_end = (800 + 60 + 40) * 2,
+		.htotal = (800 + 60 + 40 + 40) * 2,
+		.vdisplay = 2560,
+		.vsync_start = 2560 + 2890,
+		.vsync_end = 2560 + 2890 + 4,
+		.vtotal = 2560 + 2890 + 4 + 18,
+	},
+};
+
+static const struct drm_display_mode ppc357db1_4_modes[] = {
+	{
+		.clock = (800 + 60 + 20 + 40) * 2 * (2560 + 154 + 4 + 18) * 60 / 1000,

drivers/gpu/drm/panel/panel-himax-hx83121a.c new file +67 -0

+
+/* Model name: BOE PPC357DB1-4 */
+static const struct panel_desc boe_ppc357db1_4_desc = {
+	.width_mm = 266,
+	.height_mm = 166,
+	.lanes = 4,
+	.format = MIPI_DSI_FMT_RGB888,
+	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_CLOCK_NON_CONTINUOUS |
+		      MIPI_DSI_MODE_LPM,
+	.dsc_cfg = &ppc357db1_4_dsc_cfg,
+	.dsc_modes = ppc357db1_4_dsc_modes,
+	.num_dsc_modes = ARRAY_SIZE(ppc357db1_4_dsc_modes),
+	.modes = ppc357db1_4_modes,
+	.num_modes = ARRAY_SIZE(ppc357db1_4_modes),
+	.init_sequence_dsc = boe_ppc357db1_4_dsc_init_seq,
+	.init_sequence = boe_ppc357db1_4_init_seq,
+	.is_dual_dsi = true,
+	.has_dcs_backlight = true,
+};
+
+/* Model name: CSOT PPC357DB1-4 */
+static const struct panel_desc csot_ppc357db1_4_desc = {
+	.width_mm = 266,
+	.height_mm = 166,
+	.lanes = 4,
+	.format = MIPI_DSI_FMT_RGB888,
+	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_CLOCK_NON_CONTINUOUS |
+		      MIPI_DSI_MODE_LPM,
+	.dsc_cfg = &ppc357db1_4_dsc_cfg,
+	.dsc_modes = ppc357db1_4_dsc_modes,
+	.num_dsc_modes = ARRAY_SIZE(ppc357db1_4_dsc_modes),
+	.modes = ppc357db1_4_modes,
+	.num_modes = ARRAY_SIZE(ppc357db1_4_modes),
+	.init_sequence_dsc = csot_ppc357db1_4_dsc_init_seq,
+	.init_sequence = csot_ppc357db1_4_init_seq,
+	.is_dual_dsi = true,
+	.has_dcs_backlight = 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[] = {
+	{ .compatible = "boe,ppc357db1-4", .data = &boe_ppc357db1_4_desc },
+	{ .compatible = "csot,ppc357db1-4", .data = &csot_ppc357db1_4_desc },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, himax_of_match);
+
+static struct mipi_dsi_driver himax_driver = {
+	.probe = himax_probe,
+	.remove = himax_remove,
+	.driver = {
+		.name = "panel-himax-hx83121a",
+		.of_match_table = himax_of_match,
+	},
+};
+module_mipi_dsi_driver(himax_driver);
+
+MODULE_AUTHOR("Pengyu Luo <[email protected]>");
+MODULE_DESCRIPTION("Himax HX83121A DriverIC panels driver");
+MODULE_LICENSE("GPL");