On 2021-09-13 3:13 p.m., Alex Deucher wrote:
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
Can you add a fixes: tag?
Alex
Sure, I think the relevant patch is:
Fixes: 64b1d0e8d50 ("drm/amd/display: Add DCN3.1 HWSEQ")
Regards,
Nicholas Kazlauskas
On Mon, Sep 13, 2021 at 3:11 PM Nicholas Kazlauskas
<nicholas.kazlauskas@xxxxxxx> wrote:
[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.
Cc: Aaron Liu <aaron.liu@xxxxxxx>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 ++
1 file changed, 2 insertions(+)
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 53363728dbb..b0426bb3f2e 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -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);
--
2.25.1
