From: Mario Limonciello Date: Thu, 22 May 2025 14:13:28 +0000 (-0500) Subject: Revert "drm/amd: Keep display off while going into S4" X-Git-Tag: v6.14.9~35 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=edfb7f9d27e2cd9aad55cfb5aaa6c67801613e6a;p=thirdparty%2Fkernel%2Fstable.git Revert "drm/amd: Keep display off while going into S4" commit 7e7cb7a13c81073d38a10fa7b450d23712281ec4 upstream. commit 68bfdc8dc0a1a ("drm/amd: Keep display off while going into S4") attempted to keep displays off during the S4 sequence by not resuming display IP. This however leads to hangs because DRM clients such as the console can try to access registers and cause a hang. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4155 Fixes: 68bfdc8dc0a1a ("drm/amd: Keep display off while going into S4") Reviewed-by: Alex Deucher Link: https://lore.kernel.org/r/20250522141328.115095-1-mario.limonciello@amd.com Signed-off-by: Mario Limonciello Signed-off-by: Alex Deucher (cherry picked from commit e485502c37b097b0bd773baa7e2741bf7bd2909a) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- 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 7b1fd3b28e9b5..1a7bfc548d702 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -3392,11 +3392,6 @@ static int dm_resume(struct amdgpu_ip_block *ip_block) return 0; } - - /* leave display off for S4 sequence */ - if (adev->in_s4) - return 0; - /* Recreate dc_state - DC invalidates it when setting power state to S3. */ dc_state_release(dm_state->context); dm_state->context = dc_state_create(dm->dc, NULL);