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Merge pull request #7613 from HiassofT/le11-kernel-6.1.15
[le11] linux (RPi): update to 6.1.19-e3376fb
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41 changes: 41 additions & 0 deletions
41
packages/linux/patches/raspberrypi/linux-010-fix-vc4-rgb-check.patch
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,41 @@ | ||
From affc6fdac5376701ea468270af1b6fd9ca7616be Mon Sep 17 00:00:00 2001 | ||
From: Matthias Reichl <hias@horus.com> | ||
Date: Sat, 11 Mar 2023 22:41:17 +0100 | ||
Subject: [PATCH] drm/vc4: drop unnecessary and harmful HDMI RGB format check | ||
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||
RGB is a mandatory format for all DVI and HDMI monitors so there's | ||
no need to check for presence of the DRM_COLOR_FORMAT_RGB444 bit in | ||
color_formats. | ||
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More importantly this checks breaks working around EDID issues with | ||
eg video=HDMI-A-1:1024x768D or drm.edid_firmware=edid/1024x768.bin | ||
as the RGB444 bit is only set when a valid EDID with digital bit set in | ||
the input byte is present - which isn't the case when no EDID can be | ||
read from the display device at all or with the in-built kernel EDIDs, | ||
which mimic analog (VGA) displays without the digital bit set. | ||
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So drop the check, if we output video on the HDMI connector we can | ||
assume that the display can accept 8bit RGB. | ||
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Signed-off-by: Matthias Reichl <hias@horus.com> | ||
--- | ||
drivers/gpu/drm/vc4/vc4_hdmi.c | 3 --- | ||
1 file changed, 3 deletions(-) | ||
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diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c | ||
index bd762b4e3e8f2..3c60c93c0f888 100644 | ||
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c | ||
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c | ||
@@ -1962,9 +1962,6 @@ vc4_hdmi_sink_supports_format_bpc(const struct vc4_hdmi *vc4_hdmi, | ||
case VC4_HDMI_OUTPUT_RGB: | ||
drm_dbg(dev, "RGB Format, checking the constraints.\n"); | ||
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- if (!(info->color_formats & DRM_COLOR_FORMAT_RGB444)) | ||
- return false; | ||
- | ||
if (bpc == 10 && !(info->edid_hdmi_rgb444_dc_modes & DRM_EDID_HDMI_DC_30)) { | ||
drm_dbg(dev, "10 BPC but sink doesn't support Deep Color 30.\n"); | ||
return false; | ||
-- | ||
2.39.2 | ||
|
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