Comment # 15
on bug 101499
from Carlo Caione
Created attachment 132118 [details] journal_HDMI_detaching_corruption > Without seeing the corresponding Xorg log, I guess that's just > a different symptom triggered by the same issue. Attached the log. Yeah, not much different. > With an amd-staging-* kernel branch and DC enabled, you can try tweaking > dce_v11_0_crtc_do_set_base to pass AMDGPU_GEM_DOMAIN_GTT instead of / in > addition to AMDGPU_GEM_DOMAIN_VRAM to amdgpu_bo_pin. The DC code should > already handle this correctly, but we're not sure whether or not there are > additional constraints on system memory used for scanout. If there are, it > probably won't work correctly yet. I tried amd-staging-4.11 and interestingly dce_v11_0_crtc_do_set_base is called only when DC is disabled. When DRM_AMD_DC=y the function is never called. I tried also to make the s/AMDGPU_GEM_DOMAIN_VRAM/AMDGPU_GEM_DOMAIN_GTT/ change with DC disabled. What I get is that I have some kind of intermittent display corruption when _connecting_ the HDMI cable on both the screens but on detaching at least everything is fine on the laptop panel.
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