On 2021-09-13 15:11, Nicholas Kazlauskas 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> Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx> Harry > --- > 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); > >
