Commit a0f884f5 authored by Nicholas Kazlauskas's avatar Nicholas Kazlauskas Committed by Alex Deucher
Browse files

drm/amd/display: Fix white screen page fault for gpuvm 



[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: 64b1d0e8 ("drm/amd/display: Add DCN3.1 HWSEQ")
Signed-off-by: default avatarNicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Acked-by: default avatarAaron Liu <aaron.liu@amd.com>
Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent d77de788

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+2 −0
Original line number Diff line number Diff line
@@ -1125,6 +1125,8 @@ static void mmhub_read_system_context(struct amdgpu_device *adev, struct dc_phy_ 
	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);