Re: [PATCH v4 07/12] ASoC: amd: add ACP5x pcm dma driver ops

+static int acp5x_dma_open(struct snd_soc_component *component,

• 	  struct snd_pcm_substream *substream)
  

+{

• struct snd_pcm_runtime *runtime;
• struct snd_soc_pcm_runtime *prtd;
• struct i2s_dev_data *adata;
• struct i2s_stream_instance *i2s_data;
• int ret;
• runtime = substream->runtime;
• prtd = asoc_substream_to_rtd(substream);
• component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
• adata = dev_get_drvdata(component->dev);
• i2s_data = kzalloc(sizeof(*i2s_data), GFP_KERNEL);
• if (!i2s_data)

• return -EINVAL;
  

return -ENOMEM?

• if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)

• runtime->hw = acp5x_pcm_hardware_playback;
  

• else

• runtime->hw = acp5x_pcm_hardware_capture;
  

• ret = snd_pcm_hw_constraint_integer(runtime,

• 			    SNDRV_PCM_HW_PARAM_PERIODS);
  

• if (ret < 0) {

• dev_err(component->dev, "set integer constraint failed\n");
  

• kfree(i2s_data);
  

• return ret;
  

• }
• i2s_data->acp5x_base = adata->acp5x_base;
• runtime->private_data = i2s_data;
• return ret;

+}

+static int acp5x_dma_hw_params(struct snd_soc_component *component,

• 	       struct snd_pcm_substream *substream,
  

• 	       struct snd_pcm_hw_params *params)
  

+{

• struct i2s_stream_instance *rtd;
• struct snd_soc_pcm_runtime *prtd;
• struct snd_soc_card *card;
• struct acp5x_platform_info *pinfo;
• struct i2s_dev_data *adata;
• u64 size;
• prtd = asoc_substream_to_rtd(substream);
• card = prtd->card;
• pinfo = snd_soc_card_get_drvdata(card);
• adata = dev_get_drvdata(component->dev);
• rtd = substream->runtime->private_data;
• if (!rtd)

• return -EINVAL;
  

• if (pinfo) {

• if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
  

• 	rtd->i2s_instance = pinfo->play_i2s_instance;
  

• 	switch (rtd->i2s_instance) {
  

• 	case I2S_HS_INSTANCE:
  

• 		adata->play_stream = substream;
  

• 		break;
  

• 	case I2S_SP_INSTANCE:
  

• 	default:
  

• 		adata->i2ssp_play_stream = substream;
  

• 	}
  

• } else {
  

• 	rtd->i2s_instance = pinfo->cap_i2s_instance;
  

• 	switch (rtd->i2s_instance) {
  

• 	case I2S_HS_INSTANCE:
  

• 		adata->capture_stream = substream;
  

• 		break;
  

• 	case I2S_SP_INSTANCE:
  

• 	default:
  

• 		adata->i2ssp_capture_stream = substream;
  

• 	}
  

• }
  

• } else {

• dev_err(component->dev, "pinfo failed\n");
  

should you bail here with e.g. return -EINVAL?

• }
• size = params_buffer_bytes(params);
• rtd->dma_addr = substream->dma_buffer.addr;
• rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
• config_acp5x_dma(rtd, substream->stream);
• return 0;

+}