The patch below does not apply to the 5.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 12dbd1f7578feb51bc95e5a90eb617889cc0b04e Mon Sep 17 00:00:00 2001 From: Lewis Huang <Lewis.Huang@xxxxxxx> Date: Wed, 16 Sep 2020 17:13:11 -0400 Subject: [PATCH] drm/amd/display: [FIX] update clock under two conditions [Why] Update clock only when non-seamless boot stream exists creates regression on multiple scenerios. [How] Update clock in two conditions 1. Non-seamless boot stream exist. 2. Stream_count = 0 Fixes: 598c13b21e25 ("drm/amd/display: update clock when non-seamless boot stream exist") Signed-off-by: Lewis Huang <Lewis.Huang@xxxxxxx> Reviewed-by: Martin Leung <Martin.Leung@xxxxxxx> Acked-by: Qingqing Zhuo <Qingqing.zhuo@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 1efc823c2a14..7e74ddc1c708 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -1286,7 +1286,8 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c dc->optimize_seamless_boot_streams++; } - if (context->stream_count > dc->optimize_seamless_boot_streams) + if (context->stream_count > dc->optimize_seamless_boot_streams || + context->stream_count == 0) dc->hwss.prepare_bandwidth(dc, context); disable_dangling_plane(dc, context); @@ -1368,7 +1369,8 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c dc_enable_stereo(dc, context, dc_streams, context->stream_count); - if (context->stream_count > dc->optimize_seamless_boot_streams) { + if (context->stream_count > dc->optimize_seamless_boot_streams || + context->stream_count == 0) { /* Must wait for no flips to be pending before doing optimize bw */ wait_for_no_pipes_pending(dc, context); /* pplib is notified if disp_num changed */