RK_I2S_FIFO_DEPTH
val |= __SHIFTIN(RK_I2S_FIFO_DEPTH / 2, INTCR_TFT);
fifolr = uimin(fifolr, RK_I2S_FIFO_DEPTH);
while (fifolr < RK_I2S_FIFO_DEPTH - 1) {