Commit fd92ac1b authored by Hersen Wu's avatar Hersen Wu Committed by Alex Deucher
Browse files

drm/amd/display: move MST branch initialize to before link training 



some MST capable scaler doesn't like recieving CLEAR_PAYLOAD_ID_TABLE after
link training.  move branch initialize to before link training

Signed-off-by: default avatarHersen Wu <hersenxs.wu@amd.com>
Signed-off-by: default avatarTony Cheng <tony.cheng@amd.com>
Reviewed-by: default avatarTony Cheng <Tony.Cheng@amd.com>
Acked-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 3126bf79

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

+9 −0
Original line number Diff line number Diff line
@@ -258,6 +258,15 @@ bool dm_helpers_dp_mst_write_payload_allocation_table( 
	return true;

}





/*

 * Clear payload allocation table before enable MST DP link.

 */

void dm_helpers_dp_mst_clear_payload_allocation_table(

	struct dc_context *ctx,

	const struct dc_link *link)

{}



/*

 * Polls for ACT (allocation change trigger) handled and sends

 * ALLOCATE_PAYLOAD message.

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

+3 −0
Original line number Diff line number Diff line
@@ -1311,6 +1311,9 @@ static enum dc_status enable_link_dp_mst( 
	if (link->cur_link_settings.lane_count != LANE_COUNT_UNKNOWN)

		return DC_OK;



	/* clear payload table */

	dm_helpers_dp_mst_clear_payload_allocation_table(link->ctx, link);



	/* set the sink to MST mode before enabling the link */

	dp_enable_mst_on_sink(link, true);

drivers/gpu/drm/amd/display/dc/dm_helpers.h

+7 −0
Original line number Diff line number Diff line
@@ -49,6 +49,13 @@ bool dm_helpers_dp_mst_write_payload_allocation_table( 
		struct dp_mst_stream_allocation_table *proposed_table,

		bool enable);



/*

 * Clear payload allocation table before enable MST DP link.

 */

void dm_helpers_dp_mst_clear_payload_allocation_table(

	struct dc_context *ctx,

	const struct dc_link *link);



/*

 * Polls for ACT (allocation change trigger) handled and

 */