This is a note to let you know that I've just added the patch titled drm/amd/display: Fix white screen page fault for gpuvm to the 5.14-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: drm-amd-display-fix-white-screen-page-fault-for-gpuvm.patch and it can be found in the queue-5.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From a70939851f9ced298dc7d523374b8c4d05239caf Mon Sep 17 00:00:00 2001 From: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx> Date: Mon, 13 Sep 2021 14:56:44 -0400 Subject: drm/amd/display: Fix white screen page fault for gpuvm From: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx> commit a70939851f9ced298dc7d523374b8c4d05239caf upstream. [Why] The "base_addr_is_mc_addr" field was added for dcn3.1 support but pa_config was never updated to set it to false. Uninitialized memory causes it to be set to true which results in address mistranslation and white screen. [How] Use memset to ensure all fields are initialized to 0 by default. Fixes: 64b1d0e8d500 ("drm/amd/display: Add DCN3.1 HWSEQ") Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx> Acked-by: Alex Deucher <alexander.deucher@xxxxxxx> Acked-by: Aaron Liu <aaron.liu@xxxxxxx> Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -998,6 +998,8 @@ static void mmhub_read_system_context(st uint32_t agp_base, agp_bot, agp_top; PHYSICAL_ADDRESS_LOC page_table_start, page_table_end, page_table_base; + memset(pa_config, 0, sizeof(*pa_config)); + logical_addr_low = min(adev->gmc.fb_start, adev->gmc.agp_start) >> 18; pt_base = amdgpu_gmc_pd_addr(adev->gart.bo); Patches currently in stable-queue which might be from nicholas.kazlauskas@xxxxxxx are queue-5.14/drm-amd-display-fix-white-screen-page-fault-for-gpuvm.patch