From a37786abc3bbbbd3a6dc470665af083b9a492cf7 Mon Sep 17 00:00:00 2001 From: Murton Liu Date: Wed, 19 Sep 2018 14:31:12 -0400 Subject: [PATCH] drm/amd/display: HLK Periodic Frame Notification test failed [Why] Due to a small pre-fetch window, the active vline timing is a couple of lines off when compared to what it should be. [How] Changed the calculation for the start vline to account for this window. Signed-off-by: Murton Liu Reviewed-by: Aric Cyr Acked-by: Leo Li Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c index ad46294dff63..54626682bab2 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c @@ -150,7 +150,7 @@ void optc1_program_vline_interrupt( req_delta_lines--; if (req_delta_lines > vsync_line) - start_line = dc_crtc_timing->v_total - (req_delta_lines - vsync_line) - 1; + start_line = dc_crtc_timing->v_total - (req_delta_lines - vsync_line) + 2; else start_line = vsync_line - req_delta_lines; -- 2.30.2