Commit 87943159 authored by Anthony Koo's avatar Anthony Koo Committed by Alex Deucher
Browse files

drm/amd/display: Only program MSA_TIMING_PARAM if it changed 



Signed-off-by: default avatarHarry Wentland <harry.wentland@amd.com>
Reviewed-by: default avatarHarry Wentland <Harry.Wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 5813dd1c

drivers/gpu/drm/amd/display/dc/core/dc_link.c

+10 −5
Original line number Diff line number Diff line
@@ -1183,16 +1183,21 @@ static void enable_stream_features(struct pipe_ctx *pipe_ctx) 
{

	struct dc_stream_state *stream = pipe_ctx->stream;

	struct dc_link *link = stream->sink->link;

	union down_spread_ctrl downspread;

	union down_spread_ctrl old_downspread;

	union down_spread_ctrl new_downspread;



	core_link_read_dpcd(link, DP_DOWNSPREAD_CTRL,

			&downspread.raw, sizeof(downspread));

			&old_downspread.raw, sizeof(old_downspread));



	downspread.bits.IGNORE_MSA_TIMING_PARAM =

	new_downspread.raw = old_downspread.raw;



	new_downspread.bits.IGNORE_MSA_TIMING_PARAM =

			(stream->ignore_msa_timing_param) ? 1 : 0;



	if (new_downspread.raw != old_downspread.raw) {

		core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL,

			&downspread.raw, sizeof(downspread));

			&new_downspread.raw, sizeof(new_downspread));

	}

}



static enum dc_status enable_link_dp(