From 5b7bee5b445785a47b781e889e51219ec35d4407 Mon Sep 17 00:00:00 2001 From: Ilya Bakoulin Date: Fri, 14 Apr 2023 12:46:48 -0400 Subject: drm/amd/display: Workaround wrong HDR colorimetry with some receivers [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 Acked-by: Alan Liu Signed-off-by: Ilya Bakoulin Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc.c | 7 +++++++ drivers/gpu/drm/amd/display/dc/dc.h | 1 + 2 files changed, 8 insertions(+) (limited to 'drivers') diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 89a245e3c9ac..965b348dc8f1 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -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) { diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index 4424e7abb801..892e3adb99d9 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -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; -- cgit