drm_fb_xrgb8888_to_gray2
EXPORT_SYMBOL(drm_fb_xrgb8888_to_gray2);
drm_fb_xrgb8888_to_gray2(&dst, &dst_pitch, vmap, fb, rect, fmtcnv_state);
void drm_fb_xrgb8888_to_gray2(struct iosys_map *dst, const unsigned int *dst_pitch,