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drm/rockchip: dw-dp: filter yuv420 only mode

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When the display mode support yuv420, It can get the min bpp
12. If the display mode only support yuv420 and downstream
device don't set VSC_SDP_EXTENSION_FOR_COLORIMETRY_SUPPORTED
bit in DPCD, filtering this mode.

Signed-off-by: Zhang Yubing <yubing.zhang@rock-chips.com>
Change-Id: I1ba05ce8ad622ba6a25b48025fe2a3efeaa289a1
This commit is contained in:
Zhang Yubing
2022-04-08 12:10:32 +08:00
committed by Tao Huang
parent 9700637878
commit 7c4965dc25
1 changed files with 10 additions and 5 deletions
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15
drivers/gpu/drm/rockchip/dw-dp.c
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@@ -1940,8 +1940,14 @@ static int dw_dp_bridge_mode_valid(struct drm_bridge *bridge,
struct drm_display_mode m;
u32 min_bpp;
drm_mode_copy(&m, mode);
if (dp->split_mode)
drm_mode_convert_to_origin_mode(&m);
if (info->color_formats & DRM_COLOR_FORMAT_YCRCB420 &&
link->vsc_sdp_extension_for_colorimetry_supported)
link->vsc_sdp_extension_for_colorimetry_supported &&
(drm_mode_is_420_only(info, &m) || drm_mode_is_420_also(info, &m)))
min_bpp = 12;
else if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422)
min_bpp = 16;
@@ -1950,10 +1956,9 @@ static int dw_dp_bridge_mode_valid(struct drm_bridge *bridge,
else
min_bpp = 24;
drm_mode_copy(&m, mode);
if (dp->split_mode)
drm_mode_convert_to_origin_mode(&m);
if (!link->vsc_sdp_extension_for_colorimetry_supported &&
drm_mode_is_420_only(info, &m))
return MODE_NO_420;
if (m.hsync_end - m.hsync_start < 32)
return MODE_HSYNC_NARROW;