The patch below does not apply to the 6.6-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@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 0dbb81d44108a2a1004e5b485ef3fca5bc078424 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024081907-uptight-blah-bb36@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

0dbb81d44108 ("drm/amd/display: Enable otg synchronization logic for DCN321")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 0dbb81d44108a2a1004e5b485ef3fca5bc078424 Mon Sep 17 00:00:00 2001 From: Loan Chen lo-an.chen@amd.com Date: Fri, 2 Aug 2024 13:57:40 +0800 Subject: [PATCH] drm/amd/display: Enable otg synchronization logic for DCN321

[Why] Tiled display cannot synchronize properly after S3. The fix for commit 5f0c74915815 ("drm/amd/display: Fix for otg synchronization logic") is not enable in DCN321, which causes the otg is excluded from synchronization.

[How] Enable otg synchronization logic in dcn321.

Fixes: 5f0c74915815 ("drm/amd/display: Fix for otg synchronization logic") Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Reviewed-by: Alvin Lee alvin.lee2@amd.com Signed-off-by: Loan Chen lo-an.chen@amd.com Signed-off-by: Tom Chung chiahsuan.chung@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com (cherry picked from commit d6ed53712f583423db61fbb802606759e023bf7b) Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c index 9a3cc0514a36..8e0588b1cf30 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c @@ -1778,6 +1778,9 @@ static bool dcn321_resource_construct( dc->caps.color.mpc.ogam_rom_caps.hlg = 0; dc->caps.color.mpc.ocsc = 1;

+ /* Use pipe context based otg sync logic */ + dc->config.use_pipe_ctx_sync_logic = true; + dc->config.dc_mode_clk_limit_support = true; dc->config.enable_windowed_mpo_odm = true; /* read VBIOS LTTPR caps */