The patch below does not apply to the 6.11-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-6.11.y git checkout FETCH_HEAD git cherry-pick -x 23d16ede33a4db4973468bf6652a09da5efd1468 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024102838-opal-rule-c671@gregkh' --subject-prefix 'PATCH 6.11.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From 23d16ede33a4db4973468bf6652a09da5efd1468 Mon Sep 17 00:00:00 2001 From: Aurabindo Pillai aurabindo.pillai@amd.com Date: Tue, 1 Oct 2024 18:03:02 -0400 Subject: [PATCH] drm/amd/display: temp w/a for dGPU to enter idle optimizations

[Why&How] vblank immediate disable currently does not work for all asics. On DCN401, the vblank interrupts never stop coming, and hence we never get a chance to trigger idle optimizations.

Add a workaround to enable immediate disable only on APUs for now. This adds a 2-frame delay for triggering idle optimization, which is a negligible overhead.

Fixes: 58a261bfc967 ("drm/amd/display: use a more lax vblank enable policy for older ASICs") Fixes: e45b6716de4b ("drm/amd/display: use a more lax vblank enable policy for DCN35+") Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Reviewed-by: Harry Wentland harry.wentland@amd.com Reviewed-by: Rodrigo Siqueira rodrigo.siqueira@amd.com Signed-off-by: Aurabindo Pillai aurabindo.pillai@amd.com Signed-off-by: Wayne Lin wayne.lin@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com (cherry picked from commit 9b47278cec98e9894adf39229e91aaf4ab9140c5) Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 6b5e2206e687..13421a58210d 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -8374,7 +8374,8 @@ static void manage_dm_interrupts(struct amdgpu_device *adev, if (amdgpu_ip_version(adev, DCE_HWIP, 0) < IP_VERSION(3, 5, 0) || acrtc_state->stream->link->psr_settings.psr_version < - DC_PSR_VERSION_UNSUPPORTED) { + DC_PSR_VERSION_UNSUPPORTED || + !(adev->flags & AMD_IS_APU)) { timing = &acrtc_state->stream->timing;

/* at least 2 frames */