vkms_config_crtc_get_writeback
KUNIT_EXPECT_EQ(test, vkms_config_crtc_get_writeback(crtc_cfg),
vkms_config_crtc_get_writeback(crtc_cfg));
writeback = vkms_config_crtc_get_writeback(crtc->config);
if (vkms_config_crtc_get_writeback(crtc_cfg)) {
if (vkms_config_crtc_get_writeback(possible_crtc)) {