This is a note to let you know that I've just added the patch titled Revert "drm/amd/display: fix bandwidth validation failure on DCN 2.1" to the 6.6-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: revert-drm-amd-display-fix-bandwidth-validation-failure-on-dcn-2.1.patch and it can be found in the queue-6.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From c2ab9ce0ee7225fc05f58a6671c43b8a3684f530 Mon Sep 17 00:00:00 2001 From: Ivan Lipski <ivlipski@xxxxxxx> Date: Fri, 5 Jan 2024 19:40:50 -0500 Subject: Revert "drm/amd/display: fix bandwidth validation failure on DCN 2.1" From: Ivan Lipski <ivlipski@xxxxxxx> commit c2ab9ce0ee7225fc05f58a6671c43b8a3684f530 upstream. This commit causes dmesg-warn on several IGT tests on DCN 3.1.6: *ERROR* link_enc_cfg_validate: Invalid link encoder assignments - 0x1c Affected IGT tests include: - amdgpu/[amd_assr|amd_plane|amd_hotplug] - kms_atomic - kms_color - kms_flip - kms_properties - kms_universal_plane and some other tests This reverts commit 3a0fa3bc245ef92838a8296e0055569b8dff94c4. Cc: Melissa Wen <mwen@xxxxxxxxxx> Cc: Hamza Mahfooz <hamza.mahfooz@xxxxxxx> Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx> Signed-off-by: Ivan Lipski <ivlipski@xxxxxxx> Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -10400,7 +10400,7 @@ static int amdgpu_dm_atomic_check(struct DRM_DEBUG_DRIVER("drm_dp_mst_atomic_check() failed\n"); goto fail; } - status = dc_validate_global_state(dc, dm_state->context, false); + status = dc_validate_global_state(dc, dm_state->context, true); if (status != DC_OK) { DRM_DEBUG_DRIVER("DC global validation failure: %s (%d)", dc_status_to_str(status), status); Patches currently in stable-queue which might be from ivlipski@xxxxxxx are queue-6.6/revert-drm-amd-display-fix-bandwidth-validation-failure-on-dcn-2.1.patch