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drm/amd/display: Workaround wrong HDR colorimetry with some receivers

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[Why]
Some scalers do not pick up color space updates unless the DP link
is disabled/re-enabled which can result in incorrect/washed out
HDR colors in some cases.

[How]
Call set_dpms_on to disable the link, re-train and re-enable with the
updated output color space.

Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Ilya Bakoulin <Ilya.Bakoulin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ilya Bakoulin
2023-04-14 12:46:48 -04:00
committed by Alex Deucher
parent 9ab367f838
commit 5b7bee5b44
2 changed files with 8 additions and 0 deletions
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7
drivers/gpu/drm/amd/display/dc/core/dc.c
View File

@@ -3268,6 +3268,13 @@ static void commit_planes_do_stream_update(struct dc *dc,
dc->hwss.prepare_bandwidth(dc, dc->current_state);
dc->link_srv->set_dpms_on(dc->current_state, pipe_ctx);
}
} else if (pipe_ctx->stream->link->wa_flags.blank_stream_on_ocs_change && stream_update->output_color_space
&& !stream->dpms_off && dc_is_dp_signal(pipe_ctx->stream->signal)) {
/*
* Workaround for firmware issue in some receivers where they don't pick up
* correct output color space unless DP link is disabled/re-enabled
*/
dc->link_srv->set_dpms_on(dc->current_state, pipe_ctx);
}
if (stream_update->abm_level && pipe_ctx->stream_res.abm) {

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

@@ -1506,6 +1506,7 @@ struct dc_link {
/* Forced DPIA into TBT3 compatibility mode. */
bool dpia_forced_tbt3_mode;
bool dongle_mode_timing_override;
bool blank_stream_on_ocs_change;
} wa_flags;
struct link_mst_stream_allocation_table mst_stream_alloc_table;