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Message-Id: <20230213153816.213526-3-maccraft123mc@gmail.com>
Date:   Mon, 13 Feb 2023 16:38:14 +0100
From:   Maya Matuszczyk <maccraft123mc@...il.com>
To:     heiko@...ech.de, Jagan Teki <jagan@...rulasolutions.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-rockchip@...ts.infradead.org,
        Maya Matuszczyk <maccraft123mc@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/4] drm: panel: Add Elida KD50T048A to Sitronix ST7701 driver

Add KD50T048A MIPI-DSI panel, which is based on ST7701 chip.
Not sure what else to add to this commit message.

Signed-off-by: Maya Matuszczyk <maccraft123mc@...il.com>
---
 drivers/gpu/drm/panel/panel-sitronix-st7701.c | 125 ++++++++++++++++++
 1 file changed, 125 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7701.c b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
index 0b8cf65172ff..660c3f435008 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
@@ -397,6 +397,31 @@ static void dmt028vghmcmi_1a_gip_sequence(struct st7701 *st7701)
 	ST7701_DSI(st7701, 0x3A, 0x70);
 }
 
+static void kd50t048a_gip_sequence(struct st7701 *st7701)
+{
+	/**
+	 * ST7701_SPEC_V1.2 is unable to provide enough information above this
+	 * specific command sequence, so grab the same from vendor BSP driver.
+	 */
+	ST7701_DSI(st7701, 0xE0, 0x00, 0x00, 0x02);
+	ST7701_DSI(st7701, 0xE1, 0x08, 0x00, 0x0A, 0x00, 0x07, 0x00, 0x09,
+		   0x00, 0x00, 0x33, 0x33);
+	ST7701_DSI(st7701, 0xE2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		   0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
+	ST7701_DSI(st7701, 0xE3, 0x00, 0x00, 0x33, 0x33);
+	ST7701_DSI(st7701, 0xE4, 0x44, 0x44);
+	ST7701_DSI(st7701, 0xE5, 0x0E, 0x60, 0xA0, 0xA0, 0x10, 0x60, 0xA0,
+		   0xA0, 0x0A, 0x60, 0xA0, 0xA0, 0x0C, 0x60, 0xA0, 0xA0);
+	ST7701_DSI(st7701, 0xE6, 0x00, 0x00, 0x33, 0x33);
+	ST7701_DSI(st7701, 0xE7, 0x44, 0x44);
+	ST7701_DSI(st7701, 0xE8, 0x0D, 0x60, 0xA0, 0xA0, 0x0F, 0x60, 0xA0,
+		   0xA0, 0x09, 0x60, 0xA0, 0xA0, 0x0B, 0x60, 0xA0, 0xA0);
+	ST7701_DSI(st7701, 0xEB, 0x02, 0x01, 0xE4, 0xE4, 0x44, 0x00, 0x40);
+	ST7701_DSI(st7701, 0xEC, 0x02, 0x01);
+	ST7701_DSI(st7701, 0xED, 0xAB, 0x89, 0x76, 0x54, 0x01, 0xFF, 0xFF,
+		   0xFF, 0xFF, 0xFF, 0xFF, 0x10, 0x45, 0x67, 0x98, 0xBA);
+}
+
 static int st7701_prepare(struct drm_panel *panel)
 {
 	struct st7701 *st7701 = panel_to_st7701(panel);
@@ -700,6 +725,105 @@ static const struct st7701_panel_desc dmt028vghmcmi_1a_desc = {
 	.gip_sequence = dmt028vghmcmi_1a_gip_sequence,
 };
 
+static const struct drm_display_mode kd50t048a_mode = {
+	.clock          = 27500,
+
+	.hdisplay       = 480,
+	.hsync_start    = 480 + 2,
+	.hsync_end      = 480 + 2 + 10,
+	.htotal         = 480 + 2 + 10 + 2,
+
+	.vdisplay       = 854, // was: 854 12 2 60
+	.vsync_start    = 854 + 2,
+	.vsync_end      = 854 + 2 + 2,
+	.vtotal         = 854 + 2 + 2 + 17,
+
+	.width_mm       = 69,
+	.height_mm      = 139,
+
+	.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+};
+
+static const struct st7701_panel_desc kd50t048a_desc = {
+	.mode = &kd50t048a_mode,
+	.lanes = 2,
+	.format = MIPI_DSI_FMT_RGB888,
+	.panel_sleep_delay = 0,
+
+	.pv_gamma = {
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC0_MASK, 0),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC4_MASK, 0xd),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC8_MASK, 0x14),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC16_MASK, 0xd),
+
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC24_MASK, 0x10),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC52_MASK, 0x5),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC80_MASK, 0x2),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC108_MASK, 0x8),
+
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC147_MASK, 0x8),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC175_MASK, 0x1e),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC203_MASK, 0x5),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC231_MASK, 0x13),
+
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC239_MASK, 0x11),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 2) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC247_MASK, 0x23),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC251_MASK, 0x29),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC255_MASK, 0x18)
+	},
+	.nv_gamma = {
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC0_MASK, 0),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC4_MASK, 0xc),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC8_MASK, 0x14),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC16_MASK, 0xc),
+
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC24_MASK, 0x10),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC52_MASK, 0x5),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC80_MASK, 0x3),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC108_MASK, 0x8),
+
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC147_MASK, 0x7),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC175_MASK, 0x20),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC203_MASK, 0x5),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC231_MASK, 0x13),
+
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC239_MASK, 0x11),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 2) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC247_MASK, 0x24),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC251_MASK, 0x29),
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
+		CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC255_MASK, 0x18)
+	},
+	.nlinv = 1,
+	.vop_uv = 4887500,
+	.vcom_uv = 937500,
+	.vgh_mv = 15000,
+	.vgl_mv = -9510,
+	.avdd_mv = 6600,
+	.avcl_mv = -4400,
+	.gamma_op_bias = OP_BIAS_MIDDLE,
+	.input_op_bias = OP_BIAS_MIN,
+	.output_op_bias = OP_BIAS_MIN,
+	.t2d_ns = 1600,
+	.t3d_ns = 10400,
+	.eot_en = true,
+	.gip_sequence = kd50t048a_gip_sequence,
+};
+
 static int st7701_dsi_probe(struct mipi_dsi_device *dsi)
 {
 	const struct st7701_panel_desc *desc;
@@ -776,6 +900,7 @@ static void st7701_dsi_remove(struct mipi_dsi_device *dsi)
 static const struct of_device_id st7701_of_match[] = {
 	{ .compatible = "densitron,dmt028vghmcmi-1a", .data = &dmt028vghmcmi_1a_desc },
 	{ .compatible = "techstar,ts8550b", .data = &ts8550b_desc },
+	{ .compatible = "elida,kd50t048a", .data = &kd50t048a_desc },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, st7701_of_match);
-- 
2.39.1

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