int (*is_format_supported)(struct gbm_device *gbm,
uint32_t format,
uint32_t usage);
+ int (*get_format_modifier_plane_count)(struct gbm_device *device,
+ uint32_t format,
+ uint64_t modifier);
struct gbm_bo *(*bo_create)(struct gbm_device *gbm,
uint32_t width, uint32_t height,