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From: Heiko Stuebner <heiko@sntech.de>
To: neil.armstrong@linaro.org
Cc: quic_jesszhan@quicinc.com, sam@ravnborg.org,
 maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de,
 robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
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 quentin.schulz@theobroma-systems.com,
 Heiko Stuebner <heiko.stuebner@cherry.de>
Subject: [PATCH 1/3] drm/panel: ltk500hd1829: make room for more similar
 panels
Date: Thu, 15 Feb 2024 10:05:13 +0100
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From: Heiko Stuebner <heiko.stuebner@cherry.de>

There exist more dsi-panels from Leadtek sharing supplies and timings
with only the panel-mode and init commands differing.

So make room in the driver to also keep variants here instead of
requiring additional drivers per panel.

Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
---
 .../drm/panel/panel-leadtek-ltk500hd1829.c    | 73 ++++++++++++-------
 1 file changed, 47 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c
index 39e408c9f762f..42f4e2584af18 100644
--- a/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c
+++ b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c
@@ -11,6 +11,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/mipi_display.h>
@@ -21,25 +22,32 @@
 #include <drm/drm_modes.h>
 #include <drm/drm_panel.h>
 
+struct ltk500hd1829_cmd {
+	char cmd;
+	char data;
+};
+
+struct ltk500hd1829_desc {
+	const struct drm_display_mode *mode;
+	const struct ltk500hd1829_cmd *init;
+	unsigned int num_init;
+};
+
 struct ltk500hd1829 {
 	struct device *dev;
 	struct drm_panel panel;
 	struct gpio_desc *reset_gpio;
 	struct regulator *vcc;
 	struct regulator *iovcc;
+	const struct ltk500hd1829_desc *panel_desc;
 	bool prepared;
 };
 
-struct ltk500hd1829_cmd {
-	char cmd;
-	char data;
-};
-
 /*
  * There is no description in the Reference Manual about these commands.
  * We received them from the vendor, so just use them as is.
  */
-static const struct ltk500hd1829_cmd init_code[] = {
+static const struct ltk500hd1829_cmd ltk500hd1829_init[] = {
 	{ 0xE0, 0x00 },
 	{ 0xE1, 0x93 },
 	{ 0xE2, 0x65 },
@@ -260,6 +268,26 @@ static const struct ltk500hd1829_cmd init_code[] = {
 	{ 0x35, 0x00 },
 };
 
+static const struct drm_display_mode ltk500hd1829_mode = {
+	.hdisplay	= 720,
+	.hsync_start	= 720 + 50,
+	.hsync_end	= 720 + 50 + 50,
+	.htotal		= 720 + 50 + 50 + 50,
+	.vdisplay	= 1280,
+	.vsync_start	= 1280 + 30,
+	.vsync_end	= 1280 + 30 + 4,
+	.vtotal		= 1280 + 30 + 4 + 12,
+	.clock		= 69217,
+	.width_mm	= 62,
+	.height_mm	= 110,
+};
+
+static const struct ltk500hd1829_desc ltk500hd1829_data = {
+	.mode = &ltk500hd1829_mode,
+	.init = ltk500hd1829_init,
+	.num_init = ARRAY_SIZE(ltk500hd1829_init),
+};
+
 static inline
 struct ltk500hd1829 *panel_to_ltk500hd1829(struct drm_panel *panel)
 {
@@ -324,8 +352,8 @@ static int ltk500hd1829_prepare(struct drm_panel *panel)
 	/* tRT: >= 5ms */
 	usleep_range(5000, 6000);
 
-	for (i = 0; i < ARRAY_SIZE(init_code); i++) {
-		ret = mipi_dsi_generic_write(dsi, &init_code[i],
+	for (i = 0; i < ctx->panel_desc->num_init; i++) {
+		ret = mipi_dsi_generic_write(dsi, &ctx->panel_desc->init[i],
 					     sizeof(struct ltk500hd1829_cmd));
 		if (ret < 0) {
 			dev_err(panel->dev, "failed to write init cmds: %d\n", ret);
@@ -359,31 +387,17 @@ static int ltk500hd1829_prepare(struct drm_panel *panel)
 	return ret;
 }
 
-static const struct drm_display_mode default_mode = {
-	.hdisplay	= 720,
-	.hsync_start	= 720 + 50,
-	.hsync_end	= 720 + 50 + 50,
-	.htotal		= 720 + 50 + 50 + 50,
-	.vdisplay	= 1280,
-	.vsync_start	= 1280 + 30,
-	.vsync_end	= 1280 + 30 + 4,
-	.vtotal		= 1280 + 30 + 4 + 12,
-	.clock		= 69217,
-	.width_mm	= 62,
-	.height_mm	= 110,
-};
-
 static int ltk500hd1829_get_modes(struct drm_panel *panel,
 				  struct drm_connector *connector)
 {
 	struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
 	struct drm_display_mode *mode;
 
-	mode = drm_mode_duplicate(connector->dev, &default_mode);
+	mode = drm_mode_duplicate(connector->dev, ctx->panel_desc->mode);
 	if (!mode) {
 		dev_err(ctx->dev, "failed to add mode %ux%u@%u\n",
-			default_mode.hdisplay, default_mode.vdisplay,
-			drm_mode_vrefresh(&default_mode));
+			ctx->panel_desc->mode->hdisplay, ctx->panel_desc->mode->vdisplay,
+			drm_mode_vrefresh(ctx->panel_desc->mode));
 		return -ENOMEM;
 	}
 
@@ -413,6 +427,10 @@ static int ltk500hd1829_probe(struct mipi_dsi_device *dsi)
 	if (!ctx)
 		return -ENOMEM;
 
+	ctx->panel_desc = of_device_get_match_data(dev);
+	if (!ctx->panel_desc)
+		return -EINVAL;
+
 	ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(ctx->reset_gpio)) {
 		dev_err(dev, "cannot get reset gpio\n");
@@ -492,7 +510,10 @@ static void ltk500hd1829_remove(struct mipi_dsi_device *dsi)
 }
 
 static const struct of_device_id ltk500hd1829_of_match[] = {
-	{ .compatible = "leadtek,ltk500hd1829", },
+	{
+		.compatible = "leadtek,ltk500hd1829",
+		.data = &ltk500hd1829_data,
+	},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, ltk500hd1829_of_match);

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From: Heiko Stuebner <heiko@sntech.de>
To: neil.armstrong@linaro.org
Cc: quic_jesszhan@quicinc.com, sam@ravnborg.org,
 maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de,
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 quentin.schulz@theobroma-systems.com,
 Heiko Stuebner <heiko.stuebner@cherry.de>
Subject: [PATCH 2/3] dt-bindings: display: ltk500hd1829: add variant
 compatible for ltk101b4029w
Date: Thu, 15 Feb 2024 10:05:14 +0100
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From: Heiko Stuebner <heiko.stuebner@cherry.de>

Add the compatible for the ltk101b4029w panel, that is really similar
to the ltk500hd1829.

Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../bindings/display/panel/leadtek,ltk500hd1829.yaml          | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/panel/leadtek,ltk500hd1829.yaml b/Documentation/devicetree/bindings/display/panel/leadtek,ltk500hd1829.yaml
index c5944b4d636c5..d589f16772145 100644
--- a/Documentation/devicetree/bindings/display/panel/leadtek,ltk500hd1829.yaml
+++ b/Documentation/devicetree/bindings/display/panel/leadtek,ltk500hd1829.yaml
@@ -14,7 +14,9 @@ allOf:
 
 properties:
   compatible:
-    const: leadtek,ltk500hd1829
+    enum:
+      - leadtek,ltk101b4029w
+      - leadtek,ltk500hd1829
   reg: true
   backlight: true
   reset-gpios: true

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From: Heiko Stuebner <heiko@sntech.de>
To: neil.armstrong@linaro.org
Cc: quic_jesszhan@quicinc.com, sam@ravnborg.org,
 maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de,
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 Heiko Stuebner <heiko.stuebner@cherry.de>
Subject: [PATCH 3/3] drm/panel: ltk500hd1829: add panel type for ltk101b4029w
Date: Thu, 15 Feb 2024 10:05:15 +0100
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From: Heiko Stuebner <heiko.stuebner@cherry.de>

The ltk101b4029w ist a 10.1 inch DSI panel and shares the same supplies
and startup timings with the existing ltk500hd1829.

So simply add it as a variant with its own init sequence and display-mode.

Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Acked-by: Jessica Zhang <quic_jesszhan@quicinc.com>
---
 .../drm/panel/panel-leadtek-ltk500hd1829.c    | 196 ++++++++++++++++++
 1 file changed, 196 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c
index 42f4e2584af18..7bc538b7c6b7c 100644
--- a/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c
+++ b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c
@@ -43,6 +43,198 @@ struct ltk500hd1829 {
 	bool prepared;
 };
 
+static const struct ltk500hd1829_cmd ltk101b4029w_init[] = {
+	/* Page0 */
+	{ 0xE0, 0x00 },
+	/* PASSWORD */
+	{ 0xE1, 0x93 },
+	{ 0xE2, 0x65 },
+	{ 0xE3, 0xF8 },
+	{ 0x80, 0x03 }, /* 0X03:4-LANE; 0X02:3-LANE; 0X01:2-LANE */
+	/* Page1 */
+	{ 0xE0, 0x01 },
+	/* Set VCOM */
+	{ 0x00, 0x00 },
+	{ 0x01, 0x6F },
+	/* Set Gamma Power, VGMP,VGMN,VGSP,VGSN */
+	{ 0x17, 0x00 },
+	{ 0x18, 0xAF }, /* 4.3V */
+	{ 0x19, 0x01 }, /* 0.3V */
+	{ 0x1A, 0x00 },
+	{ 0x1B, 0xAF }, /* 4.3V */
+	{ 0x1C, 0x01 }, /* 0.3V */
+	/* Set Gate Power */
+	{ 0x1F, 0x3E }, /* VGH_R  = 15V */
+	{ 0x20, 0x28 }, /* VGL_R  = -12V */
+	{ 0x21, 0x28 }, /* VGL_R2 = -12V */
+	{ 0x22, 0x7E },
+	/* SETPANEL */
+	{ 0x35, 0x26 },
+	{ 0x37, 0x09 },
+	/* SET RGBCYC */
+	{ 0x38, 0x04 },
+	{ 0x39, 0x00 },
+	{ 0x3A, 0x01 },
+	{ 0x3C, 0x7C },
+	{ 0x3D, 0xFF },
+	{ 0x3E, 0xFF },
+	{ 0x3F, 0x7F },
+	/* Set TCON */
+	{ 0x40, 0x06 }, /* RSO = 800 RGB */
+	{ 0x41, 0xA0 }, /* LN = 640->1280 line */
+	{ 0x42, 0x81 },
+	{ 0x43, 0x08 }, /* VFP = 8 */
+	{ 0x44, 0x0B }, /* VBP = 12 */
+	{ 0x45, 0x28 }, /* HBP = 40 */
+	/* power voltage */
+	{ 0x55, 0x0F }, /* DCDCM = 0001, JD PWR_IC */
+	{ 0x57, 0x69 },
+	{ 0x59, 0x0A }, /* VCL = -2.9V */
+	{ 0x5A, 0x28 }, /* VGH = 15V */
+	{ 0x5B, 0x14 }, /* VGL = -11V */
+	/* Gamma */
+	{ 0x5D, 0x7C },
+	{ 0x5E, 0x65 },
+	{ 0x5F, 0x55 },
+	{ 0x60, 0x47 },
+	{ 0x61, 0x43 },
+	{ 0x62, 0x32 },
+	{ 0x63, 0x34 },
+	{ 0x64, 0x1C },
+	{ 0x65, 0x33 },
+	{ 0x66, 0x31 },
+	{ 0x67, 0x30 },
+	{ 0x68, 0x4E },
+	{ 0x69, 0x3C },
+	{ 0x6A, 0x44 },
+	{ 0x6B, 0x35 },
+	{ 0x6C, 0x31 },
+	{ 0x6D, 0x23 },
+	{ 0x6E, 0x11 },
+	{ 0x6F, 0x00 },
+	{ 0x70, 0x7C },
+	{ 0x71, 0x65 },
+	{ 0x72, 0x55 },
+	{ 0x73, 0x47 },
+	{ 0x74, 0x43 },
+	{ 0x75, 0x32 },
+	{ 0x76, 0x34 },
+	{ 0x77, 0x1C },
+	{ 0x78, 0x33 },
+	{ 0x79, 0x31 },
+	{ 0x7A, 0x30 },
+	{ 0x7B, 0x4E },
+	{ 0x7C, 0x3C },
+	{ 0x7D, 0x44 },
+	{ 0x7E, 0x35 },
+	{ 0x7F, 0x31 },
+	{ 0x80, 0x23 },
+	{ 0x81, 0x11 },
+	{ 0x82, 0x00 },
+	 /* Page2, for GIP */
+	{ 0xE0, 0x02 },
+	/* GIP_L Pin mapping */
+	{ 0x00, 0x1E },
+	{ 0x01, 0x1E },
+	{ 0x02, 0x41 },
+	{ 0x03, 0x41 },
+	{ 0x04, 0x43 },
+	{ 0x05, 0x43 },
+	{ 0x06, 0x1F },
+	{ 0x07, 0x1F },
+	{ 0x08, 0x35 },
+	{ 0x09, 0x1F },
+	{ 0x0A, 0x15 },
+	{ 0x0B, 0x15 },
+	{ 0x0C, 0x1F },
+	{ 0x0D, 0x47 },
+	{ 0x0E, 0x47 },
+	{ 0x0F, 0x45 },
+	{ 0x10, 0x45 },
+	{ 0x11, 0x4B },
+	{ 0x12, 0x4B },
+	{ 0x13, 0x49 },
+	{ 0x14, 0x49 },
+	{ 0x15, 0x1F },
+	/* GIP_R Pin mapping */
+	{ 0x16, 0x1E },
+	{ 0x17, 0x1E },
+	{ 0x18, 0x40 },
+	{ 0x19, 0x40 },
+	{ 0x1A, 0x42 },
+	{ 0x1B, 0x42 },
+	{ 0x1C, 0x1F },
+	{ 0x1D, 0x1F },
+	{ 0x1E, 0x35 },
+	{ 0x1F, 0x1F },
+	{ 0x20, 0x15 },
+	{ 0x21, 0x15 },
+	{ 0x22, 0x1f },
+	{ 0x23, 0x46 },
+	{ 0x24, 0x46 },
+	{ 0x25, 0x44 },
+	{ 0x26, 0x44 },
+	{ 0x27, 0x4A },
+	{ 0x28, 0x4A },
+	{ 0x29, 0x48 },
+	{ 0x2A, 0x48 },
+	{ 0x2B, 0x1F },
+	/* GIP Timing */
+	{ 0x58, 0x40 },
+	{ 0x5B, 0x30 },
+	{ 0x5C, 0x03 },
+	{ 0x5D, 0x30 },
+	{ 0x5E, 0x01 },
+	{ 0x5F, 0x02 },
+	{ 0x63, 0x14 },
+	{ 0x64, 0x6A },
+	{ 0x67, 0x73 },
+	{ 0x68, 0x05 },
+	{ 0x69, 0x14 },
+	{ 0x6A, 0x6A },
+	{ 0x6B, 0x08 },
+	{ 0x6C, 0x00 },
+	{ 0x6D, 0x00 },
+	{ 0x6E, 0x00 },
+	{ 0x6F, 0x88 },
+	{ 0x77, 0xDD },
+	{ 0x79, 0x0E },
+	{ 0x7A, 0x03 },
+	{ 0x7D, 0x14 },
+	{ 0x7E, 0x6A },
+	/* Page4 */
+	{ 0xE0, 0x04 },
+	{ 0x09, 0x11 },
+	{ 0x0E, 0x48 },
+	{ 0x2B, 0x2B },
+	{ 0x2D, 0x03 },
+	{ 0x2E, 0x44 },
+	/* Page0 */
+	{ 0xE0, 0x00 },
+	{ 0xE6, 0x02 },
+	{ 0xE7, 0x0C },
+};
+
+static const struct drm_display_mode ltk101b4029w_mode = {
+	.hdisplay	= 800,
+	.hsync_start	= 800 + 18,
+	.hsync_end	= 800 + 18 + 18,
+	.htotal		= 800 + 18 + 18 + 18,
+	.vdisplay	= 1280,
+	.vsync_start	= 1280 + 24,
+	.vsync_end	= 1280 + 24 + 4,
+	.vtotal		= 1280 + 24 + 4 + 8,
+	.clock		= 67330,
+	.width_mm	= 136,
+	.height_mm	= 218,
+};
+
+static const struct ltk500hd1829_desc ltk101b4029w_data = {
+	.mode = &ltk101b4029w_mode,
+	.init = ltk101b4029w_init,
+	.num_init = ARRAY_SIZE(ltk101b4029w_init),
+};
+
 /*
  * There is no description in the Reference Manual about these commands.
  * We received them from the vendor, so just use them as is.
@@ -510,6 +702,10 @@ static void ltk500hd1829_remove(struct mipi_dsi_device *dsi)
 }
 
 static const struct of_device_id ltk500hd1829_of_match[] = {
+	{
+		.compatible = "leadtek,ltk101b4029w",
+		.data = &ltk101b4029w_data,
+	},
 	{
 		.compatible = "leadtek,ltk500hd1829",
 		.data = &ltk500hd1829_data,