diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0643-drm-vc4-hdmi-Fix-no-video-output-on-DVI-monitors.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0643-drm-vc4-hdmi-Fix-no-video-output-on-DVI-monitors.patch | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0643-drm-vc4-hdmi-Fix-no-video-output-on-DVI-monitors.patch b/target/linux/bcm27xx/patches-5.15/950-0643-drm-vc4-hdmi-Fix-no-video-output-on-DVI-monitors.patch new file mode 100644 index 0000000000..9f2301119e --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0643-drm-vc4-hdmi-Fix-no-video-output-on-DVI-monitors.patch @@ -0,0 +1,29 @@ +From 64c3b233b38af0817c70d142c65b915ca1fbc71a Mon Sep 17 00:00:00 2001 +From: Matthias Reichl <hias@horus.com> +Date: Thu, 30 Dec 2021 15:12:19 +0100 +Subject: [PATCH] drm/vc4: hdmi: Fix no video output on DVI monitors + +The drm edid parser doesn't signal RGB support on DVI monitors +with old edid versions, leading to 8-bit RGB mode being rejected +and no video on DVI monitors. + +As 8-bit RGB is mandatory on HDMI and DVI monitors anyways we can +simply drop the RGB format check, aligning vc4 with other drivers. + +Signed-off-by: Matthias Reichl <hias@horus.com> +--- + drivers/gpu/drm/vc4/vc4_hdmi.c | 3 --- + 1 file changed, 3 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_hdmi.c ++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c +@@ -1414,9 +1414,6 @@ vc4_hdmi_sink_supports_format_bpc(const + case VC4_HDMI_OUTPUT_RGB: + drm_dbg(dev, "RGB Format, checking the constraints.\n"); + +- 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; |