From: Anthony Koo <Anthony.Koo@amd.com>
Date: Fri, 15 Nov 2019 19:58:53 +0000 (-0500)
Subject: drm/amd/display: Limit NV12 chroma workaround
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ddba76274fd59e664f4ea82ca45ea13d179ef179;p=linux.git

drm/amd/display: Limit NV12 chroma workaround

[Why]
It is causing green Line at the bottom of SDR 480p
MPO playback

[How]
Limit workaround to vertical > 512

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c
index 38661b9c61f80..332bf3d3a6645 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c
@@ -200,7 +200,7 @@ void hubp21_set_viewport(
 	 *	Disable w/a when rotated 180 degrees, causes vertical chroma offset
 	 */
 	patched_viewport_height = viewport_c->height;
-	if (viewport_c->height != 0 && debug->nv12_iflip_vm_wa &&
+	if (debug->nv12_iflip_vm_wa && viewport_c->height > 512 &&
 			rotation != ROTATION_ANGLE_180) {
 		int pte_row_height = 0;
 		int pte_rows = 0;