ST_CAPT_BUSY
set_bit(ST_CAPT_BUSY, &fimc->state);
clear_bit(ST_CAPT_BUSY, &fimc->state);
clear_bit(ST_CAPT_BUSY, &fimc->state);
#define fimc_capture_busy(dev) test_bit(ST_CAPT_BUSY, &(dev)->state)
if (test_bit(ST_CAPT_BUSY, &fimc->state))