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drm/amd/display: Add HDR workaround for specific eDP

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commit 05af800704 upstream.

[WHY & HOW]
Some eDP panels suffer from flicking when HDR is enabled in KDE. This
quirk works around it by skipping VSC that is incompatible with eDP
panels.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3151
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 4d4257280d7957727998ef90ccc7b69c7cca8376)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Hung 2024-09-06 11:39:18 -06:00 committed by Greg Kroah-Hartman
parent 579a0a84e3
commit 487f6450bc
3 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@ -6153,12 +6153,21 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT ||
stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST ||
stream->signal == SIGNAL_TYPE_EDP) {
const struct dc_edid_caps *edid_caps;
unsigned int disable_colorimetry = 0;
if (aconnector->dc_sink) {
edid_caps = &aconnector->dc_sink->edid_caps;
disable_colorimetry = edid_caps->panel_patch.disable_colorimetry;
}
//
// should decide stream support vsc sdp colorimetry capability
// before building vsc info packet
//
stream->use_vsc_sdp_for_colorimetry = stream->link->dpcd_caps.dpcd_rev.raw >= 0x14 &&
stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED;
stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED &&
!disable_colorimetry;
if (stream->out_transfer_func->tf == TRANSFER_FUNCTION_GAMMA22)
tf = TRANSFER_FUNC_GAMMA_22;

4
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
View File

@ -71,6 +71,10 @@ static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps)
DRM_DEBUG_DRIVER("Clearing DPCD 0x317 on monitor with panel id %X\n", panel_id);
edid_caps->panel_patch.remove_sink_ext_caps = true;
break;
case drm_edid_encode_panel_id('S', 'D', 'C', 0x4154):
DRM_DEBUG_DRIVER("Disabling VSC on monitor with panel id %X\n", panel_id);
edid_caps->panel_patch.disable_colorimetry = true;
break;
default:
return;
}

1
drivers/gpu/drm/amd/display/dc/dc_types.h
View File

@ -190,6 +190,7 @@ struct dc_panel_patch {
unsigned int skip_avmute;
unsigned int mst_start_top_delay;
unsigned int remove_sink_ext_caps;
unsigned int disable_colorimetry;
};
struct dc_edid_caps {