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Rockchip: add workarround for broken CSC RGB to YUV444/YUV422

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This conversion results in slightly to dark colors for RK - prefer
RGB over YUV formats for now.
This commit is contained in:
Alex Bee 2021-03-03 18:51:14 +01:00
parent cbae81460f
commit 174ecbb07e
1 changed files with 40 additions and 0 deletions
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40
projects/Rockchip/patches/linux/default/linux-1001-drm-rockchip.patch
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@ -3057,3 +3057,43 @@ index b3247a3a7290..f5617529dbb5 100644
RK3066_PLL_RATE_NB(585000000, 6, 585, 4, 32),
RK3066_PLL_RATE_NB(432000000, 3, 216, 4, 32),
RK3066_PLL_RATE_NB(426000000, 3, 213, 4, 32),
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Alex Bee <knaerzche@gmail.com>
Date: Wed, 3 Mar 2021 18:27:40 +0100
Subject: [PATCH] HACK: drm/bridge: prefer RGB output over YUV422/YUV444 in
dw-hdmi
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index f86b8fa40ab6..00ca09956545 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2664,6 +2664,14 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
output_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
}
+ /* Hack: prefer output of RGB over YUV422/YUV444 for Rockchip,
+ * since color space conversion produces wrong results here
+ * TODO: investigate
+ */
+
+ if (is_tmds_allowed(info, mode, MEDIA_BUS_FMT_RGB888_1X24))
+ output_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
+
if ((info->color_formats & DRM_COLOR_FORMAT_YCRCB422) &&
is_tmds_allowed(info, mode, MEDIA_BUS_FMT_UYVY8_1X16))
output_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
@@ -2672,10 +2680,6 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
is_tmds_allowed(info, mode, MEDIA_BUS_FMT_YUV8_1X24))
output_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
- /* Default 8bit RGB fallback */
- if (is_tmds_allowed(info, mode, MEDIA_BUS_FMT_RGB888_1X24))
- output_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
-
*num_output_fmts = i;
return output_fmts;