Commit 39fee5f6 authored by Alvin Lee's avatar Alvin Lee Committed by Alex Deucher
Browse files

drm/amd/display: Wait for flip to complete 



[why]
In pipe split issue occurs when we program immediate flip while vsync flip is pending

[how]
Don't program immediate flip until flip is no longer pending

Signed-off-by: default avatarAlvin Lee <alvin.lee2@amd.com>
Reviewed-by: default avatarJaehyun Chung <Jaehyun.Chung@amd.com>
Acked-by: default avatarLeo Li <sunpeng.li@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 09fc26c1

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c

+11 −0
Original line number Diff line number Diff line
@@ -1265,6 +1265,17 @@ void dcn20_pipe_control_lock( 
	if (pipe->plane_state != NULL)

		flip_immediate = pipe->plane_state->flip_immediate;



	if (flip_immediate && lock) {

		while (pipe->plane_res.hubp->funcs->hubp_is_flip_pending(pipe->plane_res.hubp))	{

			udelay(1);

		}



		if (pipe->bottom_pipe != NULL)

			while (pipe->bottom_pipe->plane_res.hubp->funcs->hubp_is_flip_pending(pipe->bottom_pipe->plane_res.hubp))	{

				udelay(1);

			}

	}



	/* In flip immediate and pipe splitting case, we need to use GSL

	 * for synchronization. Only do setup on locking and on flip type change.

	 */

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