RADEON_HDP_APER_CNTL 2746 drivers/gpu/drm/radeon/r100.c WREG32_P(RADEON_HOST_PATH_CNTL, RADEON_HDP_APER_CNTL, RADEON_HDP_APER_CNTL 2747 drivers/gpu/drm/radeon/r100.c ~RADEON_HDP_APER_CNTL); RADEON_HDP_APER_CNTL 2767 drivers/gpu/drm/radeon/r100.c if (RREG32(RADEON_HOST_PATH_CNTL) & RADEON_HDP_APER_CNTL)