[PATCH v3 0/2] BOE TD4320 panel

[PATCH v3 0/2] BOE TD4320 panel

[Barnabás Czémán]

Add driver for BOE TD4320 DSI panel, used in Xiaomi Redmi Note 7
smartphones.

Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
Changes in v3:
- Convert to use devm_drm_panel_alloc
- Fix vsn, vsp supplies description.
- Link to v2: https://lore.kernel.org/r/20250429-lavender-panel-v2-0-fb467ff81bac@mainlining.org

Changes in v2:
- Add supplies
- Link to v1: https://lore.kernel.org/r/20250427-lavender-panel-v1-0-b2611674166c@mainlining.org

---
Barnabás Czémán (2):
      dt-bindings: display: panel: Add BOE TD4320
      drivers: gpu: drm: panel: Add BOE TD4320

 .../bindings/display/panel/boe,td4320.yaml         |  65 ++++++
 drivers/gpu/drm/panel/Kconfig                      |   9 +
 drivers/gpu/drm/panel/Makefile                     |   1 +
 drivers/gpu/drm/panel/panel-boe-td4320.c           | 247 +++++++++++++++++++++
 4 files changed, 322 insertions(+)
---
base-commit: 393d0c54cae31317deaa9043320c5fd9454deabc
change-id: 20250426-lavender-panel-2f144429cc1b

Best regards,
-- 
Barnabás Czémán <barnabas.czeman@mainlining.org>

[PATCH v3 1/2] dt-bindings: display: panel: Add BOE TD4320

[Barnabás Czémán]

Document BOE TD4320 6.3" 2340x1080 panel
found in Xiaomi Redmi Note 7 smartphone.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 .../bindings/display/panel/boe,td4320.yaml         | 65 ++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/boe,td4320.yaml b/Documentation/devicetree/bindings/display/panel/boe,td4320.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..c6bff0ece360e6436a04f7d4740f43f45b887fc8
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/boe,td4320.yaml
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/boe,td4320.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: BOE TD4320 MIPI-DSI panels
+
+maintainers:
+  - Barnabas Czeman <barnabas.czeman@mainlining.org>
+
+description:
+  BOE TD4320 6.3" 1080x2340 panel found in Xiaomi Redmi Note 7 smartphone.
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: boe,td4320
+
+  reg:
+    maxItems: 1
+
+  iovcc-supply:
+    description: I/O voltage rail
+
+  vsn-supply:
+    description: Negative source voltage rail
+
+  vsp-supply:
+    description: Positive source voltage rail
+
+required:
+  - compatible
+  - reg
+  - reset-gpios
+  - port
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "boe,td4320";
+            reg = <0>;
+            backlight = <&backlight>;
+            reset-gpios = <&tlmm 45 GPIO_ACTIVE_LOW>;
+
+            port {
+                panel_in: endpoint {
+                    remote-endpoint = <&dsi_out>;
+                };
+            };
+        };
+    };
+
+...

-- 
2.49.0

[PATCH v3 2/2] drivers: gpu: drm: panel: Add BOE TD4320

[Barnabás Czémán]

Add driver for BOE TD4320 DSI panel, used in Xiaomi Redmi Note 7
mobile phone.

Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 drivers/gpu/drm/panel/Kconfig            |   9 ++
 drivers/gpu/drm/panel/Makefile           |   1 +
 drivers/gpu/drm/panel/panel-boe-td4320.c | 247 +++++++++++++++++++++++++++++++
 3 files changed, 257 insertions(+)

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 7e9c60a626fbbabb954ed2a7e3d1ef5eee0679d6..639f4324db617a0a2a56debd75eeca7a50e60df6 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -67,6 +67,15 @@ config DRM_PANEL_BOE_HIMAX8279D
 	  24 bit RGB per pixel. It provides a MIPI DSI interface to
 	  the host and has a built-in LED backlight.
 
+config DRM_PANEL_BOE_TD4320
+	tristate "BOE TD4320 DSI panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for BOE TD4320 1080x2340
+	  video mode panel found in Xiaomi Redmi Note 7 smartphones.
+
 config DRM_PANEL_BOE_TH101MB31UIG002_28A
 	tristate "Boe TH101MB31UIG002-28A panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 883974f0cba128e28f23e31512f8d30d59913b0e..5eec88e4ac3dea6a1cb357e27a32d2d14c64af9b 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -5,6 +5,7 @@ obj-$(CONFIG_DRM_PANEL_ASUS_Z00T_TM5P5_NT35596) += panel-asus-z00t-tm5p5-n35596.
 obj-$(CONFIG_DRM_PANEL_AUO_A030JTN01) += panel-auo-a030jtn01.o
 obj-$(CONFIG_DRM_PANEL_BOE_BF060Y8M_AJ0) += panel-boe-bf060y8m-aj0.o
 obj-$(CONFIG_DRM_PANEL_BOE_HIMAX8279D) += panel-boe-himax8279d.o
+obj-$(CONFIG_DRM_PANEL_BOE_TD4320) += panel-boe-td4320.o
 obj-$(CONFIG_DRM_PANEL_BOE_TH101MB31UIG002_28A) += panel-boe-th101mb31ig002-28a.o
 obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_LL2) += panel-boe-tv101wum-ll2.o
 obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_NL6) += panel-boe-tv101wum-nl6.o
diff --git a/drivers/gpu/drm/panel/panel-boe-td4320.c b/drivers/gpu/drm/panel/panel-boe-td4320.c
new file mode 100644
index 0000000000000000000000000000000000000000..1956daa2c71bc92c94fc76319d841b520407001c
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-boe-td4320.c
@@ -0,0 +1,247 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2024 Barnabas Czeman <barnabas.czeman@mainlining.org>
+// Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
+//   Copyright (c) 2013, The Linux Foundation. All rights reserved.
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.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>
+
+struct boe_td4320 {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+	struct regulator_bulk_data *supplies;
+	struct gpio_desc *reset_gpio;
+};
+
+static const struct regulator_bulk_data boe_td4320_supplies[] = {
+	{ .supply = "iovcc" },
+	{ .supply = "vsn" },
+	{ .supply = "vsp" },
+};
+
+static inline struct boe_td4320 *to_boe_td4320(struct drm_panel *panel)
+{
+	return container_of(panel, struct boe_td4320, panel);
+}
+
+static void boe_td4320_reset(struct boe_td4320 *ctx)
+{
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	usleep_range(1000, 2000);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(5000, 6000);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	msleep(30);
+}
+
+static int boe_td4320_on(struct boe_td4320 *ctx)
+{
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x04);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8,
+					 0x19, 0x55, 0x00, 0xbe, 0x00, 0x00,
+					 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9,
+					 0x4d, 0x55, 0x05, 0xe6, 0x00, 0x02,
+					 0x03);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba,
+					 0x9b, 0x5b, 0x07, 0xe6, 0x00, 0x13,
+					 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf9,
+					 0x44, 0x3f, 0x00, 0x8d, 0xbf);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce,
+					 0x5d, 0x00, 0x0f, 0x1f, 0x2f, 0x3f,
+					 0x4f, 0x5f, 0x6f, 0x7f, 0x8f, 0x9f,
+					 0xaf, 0xbf, 0xcf, 0xdf, 0xef, 0xff,
+					 0x04, 0x00, 0x02, 0x02, 0x42, 0x01,
+					 0x69, 0x5a, 0x40, 0x40, 0x00, 0x00,
+					 0x04, 0xfa, 0x00);
+	mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x00b8);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+				     0x2c);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x03);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x11, 0x00);
+	mipi_dsi_msleep(&dsi_ctx, 96);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x29, 0x00);
+	mipi_dsi_msleep(&dsi_ctx, 20);
+
+	return dsi_ctx.accum_err;
+}
+
+static int boe_td4320_off(struct boe_td4320 *ctx)
+{
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	ctx->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 20);
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 120);
+
+	return dsi_ctx.accum_err;
+}
+
+static int boe_td4320_prepare(struct drm_panel *panel)
+{
+	struct boe_td4320 *ctx = to_boe_td4320(panel);
+	struct device *dev = &ctx->dsi->dev;
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(boe_td4320_supplies), ctx->supplies);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable regulators: %d\n", ret);
+		return ret;
+	}
+
+	boe_td4320_reset(ctx);
+
+	ret = boe_td4320_on(ctx);
+	if (ret < 0) {
+		dev_err(dev, "Failed to initialize panel: %d\n", ret);
+		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+		regulator_bulk_disable(ARRAY_SIZE(boe_td4320_supplies), ctx->supplies);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int boe_td4320_unprepare(struct drm_panel *panel)
+{
+	struct boe_td4320 *ctx = to_boe_td4320(panel);
+	struct device *dev = &ctx->dsi->dev;
+	int ret;
+
+	ret = boe_td4320_off(ctx);
+	if (ret < 0)
+		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(boe_td4320_supplies), ctx->supplies);
+
+	return 0;
+}
+
+static const struct drm_display_mode boe_td4320_mode = {
+	.clock = (1080 + 86 + 2 + 100) * (2340 + 4 + 4 + 60) * 60 / 1000,
+	.hdisplay = 1080,
+	.hsync_start = 1080 + 86,
+	.hsync_end = 1080 + 86 + 2,
+	.htotal = 1080 + 86 + 2 + 100,
+	.vdisplay = 2340,
+	.vsync_start = 2340 + 4,
+	.vsync_end = 2340 + 4 + 4,
+	.vtotal = 2340 + 4 + 4 + 60,
+	.width_mm = 67,
+	.height_mm = 145,
+	.type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int boe_td4320_get_modes(struct drm_panel *panel,
+				struct drm_connector *connector)
+{
+	return drm_connector_helper_get_modes_fixed(connector, &boe_td4320_mode);
+}
+
+static const struct drm_panel_funcs boe_td4320_panel_funcs = {
+	.prepare = boe_td4320_prepare,
+	.unprepare = boe_td4320_unprepare,
+	.get_modes = boe_td4320_get_modes,
+};
+
+static int boe_td4320_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct boe_td4320 *ctx;
+	int ret;
+
+	ctx = devm_drm_panel_alloc(dev, struct boe_td4320, panel,
+				   &boe_td4320_panel_funcs,
+				   DRM_MODE_CONNECTOR_DSI);
+	if (IS_ERR(ctx))
+		return PTR_ERR(ctx);
+
+	ret = devm_regulator_bulk_get_const(dev,
+					    ARRAY_SIZE(boe_td4320_supplies),
+					    boe_td4320_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");
+
+	ctx->dsi = dsi;
+	mipi_dsi_set_drvdata(dsi, ctx);
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+	ctx->panel.prepare_prev_first = true;
+
+	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);
+
+	ret = mipi_dsi_attach(dsi);
+	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 boe_td4320_remove(struct mipi_dsi_device *dsi)
+{
+	struct boe_td4320 *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 boe_td4320_of_match[] = {
+	{ .compatible = "boe,td4320" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, boe_td4320_of_match);
+
+static struct mipi_dsi_driver boe_td4320_driver = {
+	.probe = boe_td4320_probe,
+	.remove = boe_td4320_remove,
+	.driver = {
+		.name = "panel-boe-td4320",
+		.of_match_table = boe_td4320_of_match,
+	},
+};
+module_mipi_dsi_driver(boe_td4320_driver);
+
+MODULE_AUTHOR("Barnabas Czeman <barnabas.czeman@mainlining.org>");
+MODULE_DESCRIPTION("DRM driver for boe td4320 fhdplus video mode dsi panel");
+MODULE_LICENSE("GPL");

-- 
2.49.0

Re: [PATCH v3 2/2] drivers: gpu: drm: panel: Add BOE TD4320

[Neil Armstrong]

On 30/04/2025 21:42, Barnabás Czémán wrote:
> Add driver for BOE TD4320 DSI panel, used in Xiaomi Redmi Note 7
> mobile phone.
> 
> Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
> ---
>   drivers/gpu/drm/panel/Kconfig            |   9 ++
>   drivers/gpu/drm/panel/Makefile           |   1 +
>   drivers/gpu/drm/panel/panel-boe-td4320.c | 247 +++++++++++++++++++++++++++++++
>   3 files changed, 257 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index 7e9c60a626fbbabb954ed2a7e3d1ef5eee0679d6..639f4324db617a0a2a56debd75eeca7a50e60df6 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -67,6 +67,15 @@ config DRM_PANEL_BOE_HIMAX8279D
>   	  24 bit RGB per pixel. It provides a MIPI DSI interface to
>   	  the host and has a built-in LED backlight.
>   
> +config DRM_PANEL_BOE_TD4320
> +	tristate "BOE TD4320 DSI panel"
> +	depends on OF
> +	depends on DRM_MIPI_DSI
> +	depends on BACKLIGHT_CLASS_DEVICE
> +	help
> +	  Say Y here if you want to enable support for BOE TD4320 1080x2340
> +	  video mode panel found in Xiaomi Redmi Note 7 smartphones.
> +
>   config DRM_PANEL_BOE_TH101MB31UIG002_28A
>   	tristate "Boe TH101MB31UIG002-28A panel"
>   	depends on OF
> diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
> index 883974f0cba128e28f23e31512f8d30d59913b0e..5eec88e4ac3dea6a1cb357e27a32d2d14c64af9b 100644
> --- a/drivers/gpu/drm/panel/Makefile
> +++ b/drivers/gpu/drm/panel/Makefile
> @@ -5,6 +5,7 @@ obj-$(CONFIG_DRM_PANEL_ASUS_Z00T_TM5P5_NT35596) += panel-asus-z00t-tm5p5-n35596.
>   obj-$(CONFIG_DRM_PANEL_AUO_A030JTN01) += panel-auo-a030jtn01.o
>   obj-$(CONFIG_DRM_PANEL_BOE_BF060Y8M_AJ0) += panel-boe-bf060y8m-aj0.o
>   obj-$(CONFIG_DRM_PANEL_BOE_HIMAX8279D) += panel-boe-himax8279d.o
> +obj-$(CONFIG_DRM_PANEL_BOE_TD4320) += panel-boe-td4320.o
>   obj-$(CONFIG_DRM_PANEL_BOE_TH101MB31UIG002_28A) += panel-boe-th101mb31ig002-28a.o
>   obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_LL2) += panel-boe-tv101wum-ll2.o
>   obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_NL6) += panel-boe-tv101wum-nl6.o
> diff --git a/drivers/gpu/drm/panel/panel-boe-td4320.c b/drivers/gpu/drm/panel/panel-boe-td4320.c
> new file mode 100644
> index 0000000000000000000000000000000000000000..1956daa2c71bc92c94fc76319d841b520407001c
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-boe-td4320.c
> @@ -0,0 +1,247 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +// Copyright (c) 2024 Barnabas Czeman <barnabas.czeman@mainlining.org>
> +// Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
> +//   Copyright (c) 2013, The Linux Foundation. All rights reserved.
> +
> +#include <linux/delay.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.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>
> +
> +struct boe_td4320 {
> +	struct drm_panel panel;
> +	struct mipi_dsi_device *dsi;
> +	struct regulator_bulk_data *supplies;
> +	struct gpio_desc *reset_gpio;
> +};
> +
> +static const struct regulator_bulk_data boe_td4320_supplies[] = {
> +	{ .supply = "iovcc" },
> +	{ .supply = "vsn" },
> +	{ .supply = "vsp" },
> +};
> +
> +static inline struct boe_td4320 *to_boe_td4320(struct drm_panel *panel)
> +{
> +	return container_of(panel, struct boe_td4320, panel);
> +}
> +
> +static void boe_td4320_reset(struct boe_td4320 *ctx)
> +{
> +	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
> +	usleep_range(1000, 2000);
> +	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> +	usleep_range(5000, 6000);
> +	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
> +	msleep(30);
> +}
> +
> +static int boe_td4320_on(struct boe_td4320 *ctx)
> +{
> +	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
> +
> +	ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
> +
> +	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x04);
> +	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x00);
> +	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8,
> +					 0x19, 0x55, 0x00, 0xbe, 0x00, 0x00,
> +					 0x00);
> +	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9,
> +					 0x4d, 0x55, 0x05, 0xe6, 0x00, 0x02,
> +					 0x03);
> +	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba,
> +					 0x9b, 0x5b, 0x07, 0xe6, 0x00, 0x13,
> +					 0x00);
> +	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf9,
> +					 0x44, 0x3f, 0x00, 0x8d, 0xbf);
> +	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce,
> +					 0x5d, 0x00, 0x0f, 0x1f, 0x2f, 0x3f,
> +					 0x4f, 0x5f, 0x6f, 0x7f, 0x8f, 0x9f,
> +					 0xaf, 0xbf, 0xcf, 0xdf, 0xef, 0xff,
> +					 0x04, 0x00, 0x02, 0x02, 0x42, 0x01,
> +					 0x69, 0x5a, 0x40, 0x40, 0x00, 0x00,
> +					 0x04, 0xfa, 0x00);
> +	mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x00b8);
> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
> +				     0x2c);
> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x03);
> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x11, 0x00);
> +	mipi_dsi_msleep(&dsi_ctx, 96);
> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x29, 0x00);
> +	mipi_dsi_msleep(&dsi_ctx, 20);
> +
> +	return dsi_ctx.accum_err;
> +}
> +
> +static int boe_td4320_off(struct boe_td4320 *ctx)
> +{
> +	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
> +
> +	ctx->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
> +
> +	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
> +	mipi_dsi_msleep(&dsi_ctx, 20);
> +	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
> +	mipi_dsi_msleep(&dsi_ctx, 120);
> +
> +	return dsi_ctx.accum_err;
> +}
> +
> +static int boe_td4320_prepare(struct drm_panel *panel)
> +{
> +	struct boe_td4320 *ctx = to_boe_td4320(panel);
> +	struct device *dev = &ctx->dsi->dev;
> +	int ret;
> +
> +	ret = regulator_bulk_enable(ARRAY_SIZE(boe_td4320_supplies), ctx->supplies);
> +	if (ret < 0) {
> +		dev_err(dev, "Failed to enable regulators: %d\n", ret);
> +		return ret;
> +	}
> +
> +	boe_td4320_reset(ctx);
> +
> +	ret = boe_td4320_on(ctx);
> +	if (ret < 0) {
> +		dev_err(dev, "Failed to initialize panel: %d\n", ret);
> +		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> +		regulator_bulk_disable(ARRAY_SIZE(boe_td4320_supplies), ctx->supplies);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int boe_td4320_unprepare(struct drm_panel *panel)
> +{
> +	struct boe_td4320 *ctx = to_boe_td4320(panel);
> +	struct device *dev = &ctx->dsi->dev;
> +	int ret;
> +
> +	ret = boe_td4320_off(ctx);
> +	if (ret < 0)
> +		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
> +
> +	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> +	regulator_bulk_disable(ARRAY_SIZE(boe_td4320_supplies), ctx->supplies);
> +
> +	return 0;
> +}
> +
> +static const struct drm_display_mode boe_td4320_mode = {
> +	.clock = (1080 + 86 + 2 + 100) * (2340 + 4 + 4 + 60) * 60 / 1000,
> +	.hdisplay = 1080,
> +	.hsync_start = 1080 + 86,
> +	.hsync_end = 1080 + 86 + 2,
> +	.htotal = 1080 + 86 + 2 + 100,
> +	.vdisplay = 2340,
> +	.vsync_start = 2340 + 4,
> +	.vsync_end = 2340 + 4 + 4,
> +	.vtotal = 2340 + 4 + 4 + 60,
> +	.width_mm = 67,
> +	.height_mm = 145,
> +	.type = DRM_MODE_TYPE_DRIVER,
> +};
> +
> +static int boe_td4320_get_modes(struct drm_panel *panel,
> +				struct drm_connector *connector)
> +{
> +	return drm_connector_helper_get_modes_fixed(connector, &boe_td4320_mode);
> +}
> +
> +static const struct drm_panel_funcs boe_td4320_panel_funcs = {
> +	.prepare = boe_td4320_prepare,
> +	.unprepare = boe_td4320_unprepare,
> +	.get_modes = boe_td4320_get_modes,
> +};
> +
> +static int boe_td4320_probe(struct mipi_dsi_device *dsi)
> +{
> +	struct device *dev = &dsi->dev;
> +	struct boe_td4320 *ctx;
> +	int ret;
> +
> +	ctx = devm_drm_panel_alloc(dev, struct boe_td4320, panel,
> +				   &boe_td4320_panel_funcs,
> +				   DRM_MODE_CONNECTOR_DSI);
> +	if (IS_ERR(ctx))
> +		return PTR_ERR(ctx);
> +
> +	ret = devm_regulator_bulk_get_const(dev,
> +					    ARRAY_SIZE(boe_td4320_supplies),
> +					    boe_td4320_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");
> +
> +	ctx->dsi = dsi;
> +	mipi_dsi_set_drvdata(dsi, ctx);
> +
> +	dsi->lanes = 4;
> +	dsi->format = MIPI_DSI_FMT_RGB888;
> +	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
> +			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
> +
> +	ctx->panel.prepare_prev_first = true;
> +
> +	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);
> +
> +	ret = mipi_dsi_attach(dsi);
> +	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 boe_td4320_remove(struct mipi_dsi_device *dsi)
> +{
> +	struct boe_td4320 *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 boe_td4320_of_match[] = {
> +	{ .compatible = "boe,td4320" },
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, boe_td4320_of_match);
> +
> +static struct mipi_dsi_driver boe_td4320_driver = {
> +	.probe = boe_td4320_probe,
> +	.remove = boe_td4320_remove,
> +	.driver = {
> +		.name = "panel-boe-td4320",
> +		.of_match_table = boe_td4320_of_match,
> +	},
> +};
> +module_mipi_dsi_driver(boe_td4320_driver);
> +
> +MODULE_AUTHOR("Barnabas Czeman <barnabas.czeman@mainlining.org>");
> +MODULE_DESCRIPTION("DRM driver for boe td4320 fhdplus video mode dsi panel");
> +MODULE_LICENSE("GPL");
> 

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

Re: [PATCH v3 0/2] BOE TD4320 panel

[Neil Armstrong]

Hi,

On Wed, 30 Apr 2025 21:42:11 +0200, Barnabás Czémán wrote:
> Add driver for BOE TD4320 DSI panel, used in Xiaomi Redmi Note 7
> smartphones.
> 
> 

Thanks, Applied to https://gitlab.freedesktop.org/drm/misc/kernel.git (drm-misc-next)

[1/2] dt-bindings: display: panel: Add BOE TD4320
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/af28dfc32bb4bffd9666ac20891db9d3bce8a742
[2/2] drivers: gpu: drm: panel: Add BOE TD4320
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/7220a310b9fbe431951e31487f7ae92498420e52

-- 
Neil