From: Anthony Wang <anthony1.wang@amd.com>
Date: Wed, 31 Mar 2021 15:03:35 +0000 (-0400)
Subject: drm/amd/display: Force vsync flip when reconfiguring MPCC
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=56d63782af9bbd1271bff1422a6a013123eade4d;p=linux.git

drm/amd/display: Force vsync flip when reconfiguring MPCC

[Why]
Underflow observed when disabling PIP overlay in-game when
vsync is disabled, due to OTC master lock not working with
game pipe which is immediate flip.

[How]
When performing a full update, override flip_immediate value
to false for all planes, so that flip occurs on vsync.

Signed-off-by: Anthony Wang <anthony1.wang@amd.com>
Acked-by: Bindu Ramamurthy <bindur12@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index e74027a9354ea..497e44ca98c19 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2683,6 +2683,10 @@ static void commit_planes_for_stream(struct dc *dc,
 						plane_state->triplebuffer_flips = true;
 				}
 			}
+			if (update_type == UPDATE_TYPE_FULL) {
+				/* force vsync flip when reconfiguring pipes to prevent underflow */
+				plane_state->flip_immediate = false;
+			}
 		}
 	}