linux-kernel - [PATCH v2 2/2] gpu: drm: panel: panel-simple: add new display mode for waveshare 7inch touchscreen panel

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Date: Tue,  9 Jan 2024 15:09:49 +0800
From: Shengyang Chen <shengyang.chen@...rfivetech.com>
To: devicetree@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Cc: neil.armstrong@...aro.org,
	quic_jesszhan@...cinc.com,
	sam@...nborg.org,
	airlied@...il.com,
	daniel@...ll.ch,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org,
	wahrenst@....net,
	dave.stevenson@...pberrypi.com,
	thierry.reding@...il.com,
	changhuang.liang@...rfivetech.com,
	keith.zhao@...rfivetech.com,
	shengyang.chen@...rfivetech.com,
	jack.zhu@...rfivetech.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] gpu: drm: panel: panel-simple: add new display mode for waveshare 7inch touchscreen panel

The waveshare 7" 800x480 panel is a clone of Raspberry Pi 7" 800x480 panel
It also uses a Toshiba TC358762 DSI to DPI bridge chip but it needs different
timing from Raspberry Pi panel. Add new timing for it.

Signed-off-by: Keith Zhao <keith.zhao@...rfivetech.com>
Signed-off-by: Shengyang Chen <shengyang.chen@...rfivetech.com>
---
 drivers/gpu/drm/panel/panel-simple.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 9367a4572dcf..e0896873ea33 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -4110,6 +4110,31 @@ static const struct panel_desc vl050_8048nt_c01 = {
 	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE,
 };
 
+static const struct drm_display_mode waveshare_7inch_mode = {
+	.clock = 29700000 / 1000,
+	.hdisplay = 800,
+	.hsync_start = 800 + 90,
+	.hsync_end = 800 + 90 + 5,
+	.htotal = 800 + 90 + 5 + 5,
+	.vdisplay = 480,
+	.vsync_start = 480 + 60,
+	.vsync_end = 480 + 60 + 5,
+	.vtotal = 480 + 60 + 5 + 5,
+	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+};
+
+static const struct panel_desc waveshare_7inch = {
+	.modes = &waveshare_7inch_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 154,
+		.height = 86,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.connector_type = DRM_MODE_CONNECTOR_DSI,
+};
+
 static const struct drm_display_mode winstar_wf35ltiacd_mode = {
 	.clock = 6410,
 	.hdisplay = 320,
@@ -4592,6 +4617,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "vxt,vl050-8048nt-c01",
 		.data = &vl050_8048nt_c01,
+	}, {
+		.compatible = "waveshare,7inch-touchscreen",
+		.data = &waveshare_7inch,
 	}, {
 		.compatible = "winstar,wf35ltiacd",
 		.data = &winstar_wf35ltiacd,
-- 
2.17.1