[PATCH AUTOSEL 5.13 22/24] drm/amd/display: Fix Dynamic bpp issue with 8K30 with Navi 1X
From: Sasha Levin <sashal@kernel.org>
Date: 2021-08-10 14:16:42
Also in:
amd-gfx, dri-devel, lkml
Subsystem:
amd display core, drm drivers, radeon and amdgpu drm drivers, the rest · Maintainers:
Harry Wentland, Leo Li, David Airlie, Simona Vetter, Alex Deucher, Christian König, Linus Torvalds
From: Bing Guo <redacted> [ Upstream commit 06050a0f01dbac2ca33145ef19a72041206ea983 ] Why: In DCN2x, HW doesn't automatically divide MASTER_UPDATE_LOCK_DB_X by the number of pipes ODM Combined. How: Set MASTER_UPDATE_LOCK_DB_X to the value that is adjusted by the number of pipes ODM Combined. Reviewed-by: Martin Leung <redacted> Acked-by: Aurabindo Pillai <redacted> Signed-off-by: Bing Guo <redacted> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c
index 3139d90017ee..23f830986f78 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c@@ -464,7 +464,7 @@ void optc2_lock_doublebuffer_enable(struct timing_generator *optc) REG_UPDATE_2(OTG_GLOBAL_CONTROL1, MASTER_UPDATE_LOCK_DB_X, - h_blank_start - 200 - 1, + (h_blank_start - 200 - 1) / optc1->opp_count, MASTER_UPDATE_LOCK_DB_Y, v_blank_start - 1); }
--
2.30.2