From: Robin Chen <robin.chen@xxxxxxx> [Why] In current design, the vstartup position is adjusted to vblank start position when AS-SDP is enabled. However when the vblank length is too big, it may over vstartup boundary. [How] To adjust vstartup position to 1 line before vsync position. Reviewed-by: Anthony Koo <anthony.koo@xxxxxxx> Signed-off-by: Robin Chen <robin.chen@xxxxxxx> Signed-off-by: Tom Chung <chiahsuan.chung@xxxxxxx> --- drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c index efe337ebf7c8..e9fea9c2162e 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c @@ -1132,7 +1132,8 @@ static void dcn20_adjust_freesync_v_startup( patched_crtc_timing.v_addressable - patched_crtc_timing.v_border_top; - newVstartup = asic_blank_end + (patched_crtc_timing.v_total - asic_blank_start); + /* The newVStartUp is 1 line before vsync point */ + newVstartup = asic_blank_end + 1; *vstartup_start = ((newVstartup > *vstartup_start) ? newVstartup : *vstartup_start); } -- 2.34.1
