diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/vi.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/vi.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c b/drivers/gpu/drm/amd/amdgpu/vi.c index a0435fd5525b..cad6bbfcedf3 100644 --- a/drivers/gpu/drm/amd/amdgpu/vi.c +++ b/drivers/gpu/drm/amd/amdgpu/vi.c @@ -1405,6 +1405,16 @@ static bool vi_need_reset_on_init(struct amdgpu_device *adev) unsigned int i; u32 clock_cntl, pc; + /* + * MacBookPros with switchable graphics put VRAM at 0 when the iGPU + * is enabled. Any later post (S3 resume, GPU reset) moves it back to + * the vbios default, so reset and post on load to start with the + * vbios layout. + */ + if (adev->pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE && + !(RREG32(mmMC_VM_FB_LOCATION) & MC_VM_FB_LOCATION__FB_BASE_MASK)) + return true; + for (i = 0; i < ARRAY_SIZE(vi_reset_quirks); i++) if (adev->pdev->device == vi_reset_quirks[i].device && adev->pdev->subsystem_vendor == vi_reset_quirks[i].subsystem_vendor && |