Re: [alsa-devel] [PATCH V2 01/10] ASoc: mxs: add mxs-pcm driver

+static struct snd_pcm_hardware snd_mxs_hardware = {

• .info = SNDRV_PCM_INFO_MMAP |

• 		  SNDRV_PCM_INFO_MMAP_VALID |
  

• 		  SNDRV_PCM_INFO_PAUSE |
  

• 		  SNDRV_PCM_INFO_RESUME |
  

• 		  SNDRV_PCM_INFO_INTERLEAVED,
  

• .formats = SNDRV_PCM_FMTBIT_S16_LE |

• 		  SNDRV_PCM_FMTBIT_S20_3LE |
  

• 		  SNDRV_PCM_FMTBIT_S24_LE |
  

• 		  SNDRV_PCM_FMTBIT_S32_LE,
  

• .channels_min = 2,
• .channels_max = 2,
• .period_bytes_min = 32,
• .period_bytes_max = 8192,
• .periods_min = 1,
• .periods_max = 255,

When using madplay (for MP3) instead of aplay, I get

[ 3310.010000] mxs-dma mxs-dma-apbx: maximum number of sg exceeded: 128 > 53 [ 3310.020000] dma dma1chan4: cannot prepare slave dma

So, the mxs-dma limit should be taken into account here.

• .buffer_bytes_max = 64 * 1024,
• .fifo_size = 32,

+};