R600_BIF_FB_EN 351 drivers/gpu/drm/radeon/rv515.c WREG32(R600_BIF_FB_EN, 0); R600_BIF_FB_EN 447 drivers/gpu/drm/radeon/rv515.c WREG32(R600_BIF_FB_EN, R600_FB_READ_EN | R600_FB_WRITE_EN);