VBLANK_STATUS     815 drivers/gpu/drm/amd/amdgpu/sid.h #define VBLANK_STATUS                                   0x1AEF
VBLANK_STATUS    1276 drivers/gpu/drm/radeon/evergreend.h #define VBLANK_STATUS                                   0x6bbc
VBLANK_STATUS     811 drivers/gpu/drm/radeon/sid.h #define VBLANK_STATUS                                   0x6bbc