Message-Id: <20251222-drm-panels-sony-v2-9-82a87465d163@somainline.org>
Date: Mon, 22 Dec 2025 00:32:15 +0100
From: Marijn Suijten <marijn.suijten@...ainline.org>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Sam Ravnborg <sam@...nborg.org>, David Airlie <airlied@...il.com>, 
 Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
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 Jessica Zhang <jesszhan0024@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
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 Simona Vetter <simona@...ll.ch>, Casey Connolly <casey.connolly@...aro.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Simona Vetter <simona.vetter@...ll.ch>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>, 
 Martin Botka <martin.botka@...ainline.org>, 
 Jami Kettunen <jami.kettunen@...ainline.org>, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Kuogee Hsieh <quic_khsieh@...cinc.com>, 
 Jessica Zhang <quic_jesszhan@...cinc.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Dmitry Baryshkov <lumag@...nel.org>
Subject: [PATCH v2 09/11] drm/panel: Add panel driver for Samsung SOUXP00-A
 DDIC

The Samsung SOUXP00-A Display-Driver-IC is used to drive 11644x3840@...z
6.5" DSI command-mode panels found in the Sony Xperia 1 with amb650wh01
panel and Sony Xperia 1 II with amb650wh07 panel.  It requires Display
Stream Compression 1.1.  The panels can also be driven at a 1096x2560@60
mode.

Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
---
 MAINTAINERS                                   |   1 +
 drivers/gpu/drm/panel/Kconfig                 |  16 ++
 drivers/gpu/drm/panel/Makefile                |   1 +
 drivers/gpu/drm/panel/panel-samsung-souxp00.c | 399 ++++++++++++++++++++++++++
 4 files changed, 417 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 7f32ff371799..37c5ce4b3ba5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8210,6 +8210,7 @@ DRM DRIVER FOR SAMSUNG SOUXP00 DDIC
 M:	Marijn Suijten <marijn.suijten@...ainline.org>
 S:	Maintained
 F:	Documentation/devicetree/bindings/display/panel/samsung,souxp00-a.yaml
+F:	drivers/gpu/drm/panel/panel-samsung-souxp00.c
 
 DRM DRIVER FOR SHARP MEMORY LCD
 M:	Alex Lanzano <lanzano.alex@...il.com>
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 1f148bc5b068..3cca1c580d50 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -969,6 +969,22 @@ config DRM_PANEL_SAMSUNG_SOFEF03
 	  This Display-IC uses Display Stream Compression 1.1 and features a
 	  1080x2520@60 and 1080x2520@120 mode.
 
+config DRM_PANEL_SAMSUNG_SOUXP00
+	tristate "Samsung SOUXP00-A DSI cmd mode panels"
+	depends on GPIOLIB
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	select DRM_DISPLAY_DSC_HELPER
+	select DRM_DISPLAY_HELPER
+	help
+	  Say Y here if you want to enable support for the Samsung 4k 6.5" OLED DSI
+	  command mode panel found in the Sony Xperia 1 (amb650wh01 panel) and Sony
+	  Xperia 1 II (amb650wh07 panel).
+
+	  This Display-IC uses Display Stream Compression 1.1 and features a
+	  1644x3840@60 and 1096x2560@60 mode.
+
 config DRM_PANEL_SEIKO_43WVF1G
 	tristate "Seiko 43WVF1G panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index a9636f5f433a..c19429b9e48d 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -96,6 +96,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA5X01_AMS561RA01) += panel-samsung-s6e8aa5x0
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_SOFEF00) += panel-samsung-sofef00.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_SOFEF01) += panel-samsung-sofef01.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_SOFEF03) += panel-samsung-sofef03.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_SOUXP00) += panel-samsung-souxp00.o
 obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LQ079L1SX01) += panel-sharp-lq079l1sx01.o
 obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
diff --git a/drivers/gpu/drm/panel/panel-samsung-souxp00.c b/drivers/gpu/drm/panel/panel-samsung-souxp00.c
new file mode 100644
index 000000000000..4d86fe40d963
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-souxp00.c
@@ -0,0 +1,399 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2023 Marijn Suijten <marijn.suijten@...ainline.org>
+ *
+ * Based on the following Sony downstream DTS command sequences:
+ * - Xperia 1 (kumano griffin): https://github.com/sonyxperiadev/kernel-copyleft/blob/55.2.A.4.xxx/arch/arm64/boot/dts/somc/dsi-panel-4koled.dtsi
+ * - Xperia 1 II (edo pdx203): https://github.com/sonyxperiadev/kernel-copyleft-dts/blob/58.2.A.10.xxx/somc/dsi-panel-souxp00_a-amb650wh07-uhd.dtsi
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/display/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
+
+#define WRITE_CONTROL_DISPLAY_BACKLIGHT BIT(5)
+
+/* Only used to send a few differentiating DCS between the two panel variants,
+ * without exactly knowing what they mean.  These do not seem to be related to
+ * panel functionality nor have any visual impact, but they are sent anyway just
+ * in case.
+ */
+enum panel_type {
+	/* Sony Xperia 1 */
+	PANEL_TYPE_01,
+	/* Sony Xperia 1 II */
+	PANEL_TYPE_07,
+};
+
+/*
+ * TODO: This should be communicated via the mode when .prepare
+ * receives atomic commit info
+ */
+static const bool enable_4k = true;
+
+const struct regulator_bulk_data samsung_souxp00_a_supplies[] = {
+	{ .supply = "vddio", /* 1.8 V */ },
+	{ .supply = "vci", /* 3.0 V */ },
+};
+
+struct samsung_souxp00_a {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+	struct drm_dsc_config dsc;
+	struct regulator_bulk_data *supplies;
+	struct gpio_desc *reset_gpio;
+	enum panel_type panel_type;
+};
+
+static inline struct samsung_souxp00_a *
+to_samsung_souxp00_a(struct drm_panel *panel)
+{
+	return container_of(panel, struct samsung_souxp00_a, panel);
+}
+
+static int samsung_souxp00_a_program(struct samsung_souxp00_a *ctx)
+{
+	const u16 hdisplay = enable_4k ? 1644 : 1096;
+	const u16 vdisplay = enable_4k ? 3840 : 2560;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	dsi_ctx.dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 10);
+
+	if (ctx->panel_type == PANEL_TYPE_07) {
+		mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a);
+		mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xdd, 0x00, 0x80, 0x00, 0x00);
+		mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5);
+	}
+
+	mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+
+	mipi_dsi_compression_mode_multi(&dsi_ctx, true);
+
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x05);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd7, 0x07);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe2, enable_4k ? 0 : 1);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5);
+
+	mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0, hdisplay - 1);
+	mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0, vdisplay - 1);
+
+	if (ctx->panel_type == PANEL_TYPE_01) {
+		mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a);
+		mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x70);
+		mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb9, 0x00, 0x60);
+		mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5);
+	}
+
+	/* Enable backlight control */
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+				     WRITE_CONTROL_DISPLAY_BACKLIGHT);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc5, 0x2e, 0x21);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5);
+	mipi_dsi_msleep(&dsi_ctx, 110);
+
+	return dsi_ctx.accum_err;
+}
+
+static int samsung_souxp00_a_prepare(struct drm_panel *panel)
+{
+	struct samsung_souxp00_a *ctx = to_samsung_souxp00_a(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+	struct drm_dsc_picture_parameter_set pps;
+	struct device *dev = &ctx->dsi->dev;
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(samsung_souxp00_a_supplies), ctx->supplies);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable regulators: %d\n", ret);
+		return ret;
+	}
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	usleep_range(10000, 11000);
+
+	ret = samsung_souxp00_a_program(ctx);
+	if (ret < 0) {
+		dev_err(dev, "Failed to program panel: %d\n", ret);
+		goto fail;
+	}
+
+	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);
+	mipi_dsi_msleep(&dsi_ctx, 28);
+
+	ret = dsi_ctx.accum_err;
+
+	if (ret < 0)
+		goto fail;
+
+	return 0;
+
+fail:
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(samsung_souxp00_a_supplies), ctx->supplies);
+	return ret;
+}
+
+static int samsung_souxp00_a_enable(struct drm_panel *panel)
+{
+	struct samsung_souxp00_a *ctx = to_samsung_souxp00_a(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+
+	return dsi_ctx.accum_err;
+}
+
+static int samsung_souxp00_a_disable(struct drm_panel *panel)
+{
+	struct samsung_souxp00_a *ctx = to_samsung_souxp00_a(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 17);
+
+	return dsi_ctx.accum_err;
+}
+
+static int samsung_souxp00_a_unprepare(struct drm_panel *panel)
+{
+	struct samsung_souxp00_a *ctx = to_samsung_souxp00_a(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	if (ctx->panel_type == PANEL_TYPE_01) {
+		mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+					     WRITE_CONTROL_DISPLAY_BACKLIGHT);
+		mipi_dsi_msleep(&dsi_ctx, 17);
+	}
+
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 100);
+
+	dsi_ctx.dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(samsung_souxp00_a_supplies), ctx->supplies);
+
+	return dsi_ctx.accum_err;
+}
+
+/*
+ * Small fake porch to force the DSI pclk/byteclk
+ * high enough to have a smooth panel at 60Hz.
+ *
+ * 60 for 4k, or 40 for 2.5k is fine for Griffin, but not PDX203.
+ * Even at 84 there's still the occasional hiccup.
+ */
+static const int fake_porch = 98;
+
+static const struct drm_display_mode samsung_souxp00_a_2_5k_mode = {
+	.clock = (1096 + fake_porch) * 2560 * 60 / 1000,
+	.hdisplay = 1096,
+	.hsync_start = 1096 + fake_porch,
+	.hsync_end = 1096 + fake_porch,
+	.htotal = 1096 + fake_porch,
+	.vdisplay = 2560,
+	.vsync_start = 2560,
+	.vsync_end = 2560,
+	.vtotal = 2560,
+	.width_mm = 65,
+	.height_mm = 152,
+	.type = DRM_MODE_TYPE_DRIVER,
+};
+
+static const struct drm_display_mode samsung_souxp00_a_4k_mode = {
+	.clock = (1644 + fake_porch) * 3840 * 60 / 1000,
+	.hdisplay = 1644,
+	.hsync_start = 1644 + fake_porch,
+	.hsync_end = 1644 + fake_porch,
+	.htotal = 1644 + fake_porch,
+	.vdisplay = 3840,
+	.vsync_start = 3840,
+	.vsync_end = 3840,
+	.vtotal = 3840,
+	.width_mm = 65,
+	.height_mm = 152,
+	.type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int samsung_souxp00_a_get_modes(struct drm_panel *panel,
+				     struct drm_connector *connector)
+{
+	if (enable_4k)
+		return drm_connector_helper_get_modes_fixed(
+			connector, &samsung_souxp00_a_4k_mode);
+	else
+		return drm_connector_helper_get_modes_fixed(
+			connector, &samsung_souxp00_a_2_5k_mode);
+}
+
+static const struct drm_panel_funcs samsung_souxp00_a_panel_funcs = {
+	.prepare = samsung_souxp00_a_prepare,
+	.enable = samsung_souxp00_a_enable,
+	.disable = samsung_souxp00_a_disable,
+	.unprepare = samsung_souxp00_a_unprepare,
+	.get_modes = samsung_souxp00_a_get_modes,
+};
+
+static int samsung_souxp00_a_bl_update_status(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	u16 brightness = backlight_get_brightness(bl);
+
+	return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
+}
+
+static int samsung_souxp00_a_bl_get_brightness(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	u16 brightness;
+	int ret;
+
+	ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
+
+	if (ret < 0)
+		return ret;
+
+	return brightness;
+}
+
+static const struct backlight_ops samsung_souxp00_a_bl_ops = {
+	.update_status = samsung_souxp00_a_bl_update_status,
+	.get_brightness = samsung_souxp00_a_bl_get_brightness,
+};
+
+static int samsung_souxp00_a_probe(struct mipi_dsi_device *dsi)
+{
+	const struct backlight_properties props = {
+		.type = BACKLIGHT_RAW,
+		.brightness = 400,
+		.max_brightness = 4095,
+	};
+	const u16 hdisplay = enable_4k ? 1644 : 1096;
+	struct device *dev = &dsi->dev;
+	struct samsung_souxp00_a *ctx;
+	int ret;
+
+	ctx = devm_drm_panel_alloc(dev, struct samsung_souxp00_a, panel,
+				   &samsung_souxp00_a_panel_funcs,
+				   DRM_MODE_CONNECTOR_DSI);
+	if (IS_ERR(ctx))
+		return PTR_ERR(ctx);
+
+	ctx->panel_type = (enum panel_type)of_device_get_match_data(dev);
+
+	ret = devm_regulator_bulk_get_const(
+		dev,
+		ARRAY_SIZE(samsung_souxp00_a_supplies),
+		samsung_souxp00_a_supplies,
+		&ctx->supplies);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to get regulators\n");
+
+	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");
+
+	ctx->dsi = dsi;
+	mipi_dsi_set_drvdata(dsi, ctx);
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+	ctx->panel.prepare_prev_first = true;
+
+	ctx->panel.backlight = devm_backlight_device_register(
+		dev, dev_name(dev), dev, dsi,
+		&samsung_souxp00_a_bl_ops,
+		&props);
+	if (IS_ERR(ctx->panel.backlight))
+		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
+				     "Failed to create backlight\n");
+
+	drm_panel_add(&ctx->panel);
+
+	/* This panel only supports DSC; unconditionally enable it */
+	dsi->dsc = &ctx->dsc;
+
+	ctx->dsc.dsc_version_major = 1;
+	ctx->dsc.dsc_version_minor = 1;
+
+	ctx->dsc.slice_height = 32;
+	ctx->dsc.slice_count = 2;
+	/*
+	 * hdisplay should be read from the selected mode once
+	 * it is passed back to drm_panel (in prepare?)
+	 */
+	WARN_ON(hdisplay % ctx->dsc.slice_count);
+	ctx->dsc.slice_width = hdisplay / ctx->dsc.slice_count;
+	ctx->dsc.bits_per_component = 8;
+	ctx->dsc.bits_per_pixel = 8 << 4; /* 4 fractional bits */
+	ctx->dsc.block_pred_enable = true;
+
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
+		drm_panel_remove(&ctx->panel);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void samsung_souxp00_a_remove(struct mipi_dsi_device *dsi)
+{
+	struct samsung_souxp00_a *ctx = mipi_dsi_get_drvdata(dsi);
+	int ret;
+
+	ret = mipi_dsi_detach(dsi);
+	if (ret < 0)
+		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
+
+	drm_panel_remove(&ctx->panel);
+}
+
+static const struct of_device_id samsung_souxp00_a_of_match[] = {
+	{ .compatible = "samsung,souxp00-a-amb650wh01",
+	  .data = (void *)PANEL_TYPE_01 },
+	{ .compatible = "samsung,souxp00-a-amb650wh07",
+	  .data = (void *)PANEL_TYPE_07 },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, samsung_souxp00_a_of_match);
+
+static struct mipi_dsi_driver samsung_souxp00_a_driver = {
+	.probe = samsung_souxp00_a_probe,
+	.remove = samsung_souxp00_a_remove,
+	.driver = {
+		.name = "panel-samsung-souxp00-a",
+		.of_match_table = samsung_souxp00_a_of_match,
+	},
+};
+module_mipi_dsi_driver(samsung_souxp00_a_driver);
+
+MODULE_AUTHOR("Marijn Suijten <marijn.suijten@...ainline.org>");
+MODULE_DESCRIPTION("DRM panel driver for Samsung SOUXP00-A Display-Driver-IC panels");
+MODULE_LICENSE("GPL");

-- 
2.52.0

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