From: Dale Zhao <dale.zhao@xxxxxxx>
[Why]
For some special timing with border, like DMT 640*480 72Hz,
pipe split can't handle well. Thus, it will be black screen
for these special timing.
[How]
Disable pipe split for these timing with borders as W/A.
Signed-off-by: Dale Zhao <dale.zhao@xxxxxxx>
Reviewed-by: Tony Cheng <Tony.Cheng@xxxxxxx>
Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx>
---
.../drm/amd/display/dc/dcn20/dcn20_resource.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index afa99f967558..fb167393b8fe 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -2666,6 +2666,23 @@ int dcn20_validate_apply_pipe_split_flags(
if (plane_count > dc->res_pool->pipe_count / 2)
avoid_split = true;
+ /* W/A: Mode timing with borders may not work well with pipe split, avoid for this corner case */
+ for (i = 0; i < dc->res_pool->pipe_count; i++) {
+ struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
+ struct dc_crtc_timing timing;
+
+ if (!pipe->stream)
+ continue;
+ else {
+ timing = pipe->stream->timing;
+ if (timing.h_border_left + timing.h_border_right
+ + timing.v_border_top + timing.v_border_bottom > 0) {
+ avoid_split = true;
+ break;
+ }
+ }
+ }
+
/* Avoid split loop looks for lowest voltage level that allows most unsplit pipes possible */
if (avoid_split) {
for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) {
--
2.17.1
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