snd_hdac_stream_readb_poll
snd_hdac_stream_readb_poll(azx_dev, SD_CTL, val, (val & SD_CTL_STREAM_RESET), 3, 300);
snd_hdac_stream_readb_poll(azx_dev, SD_CTL, val, !(val & SD_CTL_STREAM_RESET), 3, 300);
return snd_hdac_stream_readb_poll(cl, SD_CTL, reg, reg & SD_CTL_DMA_START,
ret = snd_hdac_stream_readb_poll(cl, SD_CTL, reg, !(reg & SD_CTL_DMA_START),
ret = snd_hdac_stream_readb_poll(cl, SD_CTL, reg, (reg & SD_CTL_STREAM_RESET),
ret = snd_hdac_stream_readb_poll(cl, SD_CTL, reg, !(reg & SD_CTL_STREAM_RESET),