[PATCH 08/20] drm/amd/display: populate subvp cmd info only for the top pipe

[Qingqing Zhuo]

From: Ayush Gupta <ayush.gupta at amd.com>

[Why]
System restart observed while changing the display resolution
to 8k with extended mode. Sytem restart was caused by a page fault.

[How]
When the driver populates subvp info it did it for both the pipes using
vblank which caused an outof bounds array access causing the page fault.
added checks to allow the top pipe only to fix this issue.

Co-authored-by: Ayush Gupta <ayush.gupta at amd.com>
Reviewed-by: Alvin Lee <Alvin.Lee2 at amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo at amd.com>
Signed-off-by: Ayush Gupta <ayush.gupta at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
index c2092775ca88..7f27e29fae11 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
@@ -750,7 +750,8 @@ void dc_dmub_setup_subvp_dmub_command(struct dc *dc,
 					!pipe->top_pipe && !pipe->prev_odm_pipe &&
 					pipe->stream->mall_stream_config.type == SUBVP_MAIN) {
 				populate_subvp_cmd_pipe_info(dc, context, &cmd, pipe, cmd_pipe_index++);
-			} else if (pipe->plane_state && pipe->stream->mall_stream_config.type == SUBVP_NONE) {
+			} else if (pipe->plane_state && pipe->stream->mall_stream_config.type == SUBVP_NONE &&
+				    !pipe->top_pipe && !pipe->prev_odm_pipe) {
 				// Don't need to check for ActiveDRAMClockChangeMargin < 0, not valid in cases where
 				// we run through DML without calculating "natural" P-state support
 				populate_subvp_cmd_vblank_pipe_info(dc, context, &cmd, pipe, cmd_pipe_index++);
-- 
2.34.1