The patch below does not apply to the 6.9-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@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-6.9.y git checkout FETCH_HEAD git cherry-pick -x 4a5b171299e59d51322f4c6bd376c5acbeca0a4a # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024061921-hardcover-jubilance-30ec@gregkh' --subject-prefix 'PATCH 6.9.y' HEAD^..

Possible dependencies:

4a5b171299e5 ("drm/amd/display: always reset ODM mode in context when adding first plane")

thanks,

greg k-h

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

From 4a5b171299e59d51322f4c6bd376c5acbeca0a4a Mon Sep 17 00:00:00 2001 From: Wenjing Liu wenjing.liu@amd.com Date: Fri, 22 Mar 2024 15:02:45 -0400 Subject: [PATCH] drm/amd/display: always reset ODM mode in context when adding first plane

[why] In current implemenation ODM mode is only reset when the last plane is removed from dc state. For any dc validate we will always remove all current planes and add new planes. However when switching from no planes to 1 plane, ODM mode is not reset because no planes get removed. This has caused an issue where we kept ODM combine when it should have been remove when a plane is added. The change is to reset ODM mode when adding the first plane.

Cc: stable@vger.kernel.org Reviewed-by: Alvin Lee alvin.lee2@amd.com Acked-by: Hamza Mahfooz hamza.mahfooz@amd.com Signed-off-by: Wenjing Liu wenjing.liu@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_state.c b/drivers/gpu/drm/amd/display/dc/core/dc_state.c index d1d326e9b9b6..4f9ef07d29ec 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_state.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_state.c @@ -458,6 +458,15 @@ bool dc_state_add_plane( goto out; }

+ if (stream_status->plane_count == 0 && dc->config.enable_windowed_mpo_odm) + /* ODM combine could prevent us from supporting more planes + * we will reset ODM slice count back to 1 when all planes have + * been removed to maximize the amount of planes supported when + * new planes are added. + */ + resource_update_pipes_for_stream_with_slice_count( + state, dc->current_state, dc->res_pool, stream, 1); + otg_master_pipe = resource_get_otg_master_for_stream( &state->res_ctx, stream); if (otg_master_pipe)