linux-kernel - [PATCH] drm/panel-simple: Add a timing for the Raspberry Pi 7" panel

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Date:   Mon, 31 Jan 2022 14:15:17 -0500
From:   Detlev Casanova <detlev.casanova@...labora.com>
To:     linux-kernel@...r.kernel.org
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Detlev Casanova <detlev.casanova@...labora.com>
Subject: [PATCH] drm/panel-simple: Add a timing for the Raspberry Pi 7" panel

From: Dave Stevenson <dave.stevenson@...pberrypi.com>

The Raspberry Pi 7" 800x480 panel uses a Toshiba TC358762 DSI
to DPI bridge chip, so there is a requirement for the timings
to be specified for the end panel. Add such a definition.

Signed-off-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
Signed-off-by: Detlev Casanova <detlev.casanova@...labora.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 0c8786ebffd1..c4696626b75d 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -3013,6 +3013,31 @@ static const struct panel_desc qishenglong_gopher2b_lcd = {
 	.connector_type = DRM_MODE_CONNECTOR_DPI,
 };
 
+static const struct drm_display_mode raspberrypi_7inch_mode = {
+	.clock = 25979400 / 1000,
+	.hdisplay = 800,
+	.hsync_start = 800 + 2,
+	.hsync_end = 800 + 2 + 2,
+	.htotal = 800 + 2 + 2 + 46,
+	.vdisplay = 480,
+	.vsync_start = 480 + 7,
+	.vsync_end = 480 + 7 + 2,
+	.vtotal = 480 + 7 + 2 + 21,
+	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+};
+
+static const struct panel_desc raspberrypi_7inch = {
+	.modes = &raspberrypi_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 display_timing rocktech_rk070er9427_timing = {
 	.pixelclock = { 26400000, 33300000, 46800000 },
 	.hactive = { 800, 800, 800 },
@@ -3958,6 +3983,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "qishenglong,gopher2b-lcd",
 		.data = &qishenglong_gopher2b_lcd,
+	}, {
+		.compatible = "raspberrypi,7inch-dsi",
+		.data = &raspberrypi_7inch,
 	}, {
 		.compatible = "rocktech,rk070er9427",
 		.data = &rocktech_rk070er9427,
-- 
2.35.0