6.4-stable review patch. If anyone has any objections, please let me know.
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From: Daniel Miess daniel.miess@amd.com
[ Upstream commit a99a4ff6ef205d125002fc7e0857074e4e6597b6 ]
This partially reverts commit de231189e7bf ("drm/amd/display: Fix possible underflow for displays with large vblank").
[Why] The increased value of VBlankNomDefaultUS causes underflow at the desktop of an IP KVM setup
[How] Change the value from 800 back to 668
Reviewed-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com Reviewed-by: Jun Lei jun.lei@amd.com Acked-by: Hamza Mahfooz hamza.mahfooz@amd.com Signed-off-by: Daniel Miess daniel.miess@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c index b878effa2129b..b428a343add9c 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c @@ -33,7 +33,7 @@ #include "dml/display_mode_vba.h"
struct _vcs_dpi_ip_params_st dcn3_14_ip = { - .VBlankNomDefaultUS = 800, + .VBlankNomDefaultUS = 668, .gpuvm_enable = 1, .gpuvm_max_page_table_levels = 1, .hostvm_enable = 1,