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104 lines
3.6 KiB
Diff
104 lines
3.6 KiB
Diff
From dc104487c9361afb69344f4b28d67191b3a86ba6 Mon Sep 17 00:00:00 2001
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From: Mattias Walström <lazzer@gmail.com>
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Date: Wed, 20 Aug 2025 21:38:24 +0200
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Subject: [PATCH 13/50] drm/panel-simple: Add a timing for the Raspberry Pi 7"
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panel
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The Raspberry Pi 7" 800x480 panel uses a Toshiba TC358762 DSI
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to DPI bridge chip, so there is a requirement for the timings
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to be specified for the end panel. Add such a definition.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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drm/panel: simple: Alter the timing for the Pi 7" DSI display
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vc4 has always fixed up the timing, so the values defined have
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never actually appeared on the wire.
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The display appears to want a slightly longer HFP, so extend
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the timings and recompute the clock to give the same frame rate.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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drm/panel-simple: Fix 7inch panel mode for misalignment
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The 7inch panel is one line off the screen both horizontally
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and vertically.
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Alter the panel mode to correct this.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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drm/panel-simple: Increase pixel clock on Pi 7inch panel
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The Toshiba bridge is very fussy and doesn't like the CM3
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output when being told to produce a 27.777MHz pixel clock, which
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is an almost perfect match to the DSI link integer divider.
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Increasing to 30MHz will switch the DSI link from 333MHz to 400MHz
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and makes the bridge happy with the same video timing as works
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on Pi4.
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(Pi4 will be using a link frequency of 375MHz due to a 3GHz
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parent PLL).
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/panel/panel-simple.c | 31 +++++++++++++++++++++++++++-
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1 file changed, 30 insertions(+), 1 deletion(-)
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diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
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index ef1c4b9299ee..c3512eb819e1 100644
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--- a/drivers/gpu/drm/panel/panel-simple.c
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+++ b/drivers/gpu/drm/panel/panel-simple.c
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@@ -400,7 +400,8 @@ static int panel_simple_get_modes(struct drm_panel *panel,
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* TODO: Remove once all drm drivers call
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* drm_connector_set_orientation_from_panel()
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*/
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- drm_connector_set_panel_orientation(connector, p->orientation);
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+ /* RPI Hack */
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+ //drm_connector_set_panel_orientation(connector, p->orientation);
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return num;
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}
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@@ -4074,6 +4075,31 @@ static const struct panel_desc qishenglong_gopher2b_lcd = {
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.connector_type = DRM_MODE_CONNECTOR_DPI,
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};
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+static const struct drm_display_mode raspberrypi_7inch_mode = {
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+ .clock = 30000,
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+ .hdisplay = 800,
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+ .hsync_start = 800 + 131,
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+ .hsync_end = 800 + 131 + 2,
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+ .htotal = 800 + 131 + 2 + 45,
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+ .vdisplay = 480,
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+ .vsync_start = 480 + 7,
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+ .vsync_end = 480 + 7 + 2,
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+ .vtotal = 480 + 7 + 2 + 22,
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+ .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
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+};
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+
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+static const struct panel_desc raspberrypi_7inch = {
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+ .modes = &raspberrypi_7inch_mode,
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+ .num_modes = 1,
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+ .bpc = 8,
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+ .size = {
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+ .width = 154,
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+ .height = 86,
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+ },
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+ .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
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+ .connector_type = DRM_MODE_CONNECTOR_DSI,
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+};
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+
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static const struct display_timing rocktech_rk043fn48h_timing = {
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.pixelclock = { 6000000, 9000000, 12000000 },
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.hactive = { 480, 480, 480 },
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@@ -5344,6 +5370,9 @@ static const struct of_device_id platform_of_match[] = {
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.compatible = "qishenglong,gopher2b-lcd",
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.data = &qishenglong_gopher2b_lcd,
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}, {
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+ .compatible = "raspberrypi,7inch-dsi",
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+ .data = &raspberrypi_7inch,
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+ }, {
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.compatible = "rocktech,rk043fn48h",
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.data = &rocktech_rk043fn48h,
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}, {
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