static int tegra_pcm_close(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct tegra_runtime_data *tegra_prtd; if (rtd->dai_link->no_pcm) return 0; tegra_prtd = (struct tegra_runtime_data *)snd_dmaengine_pcm_get_data( substream); kfree(tegra_prtd); snd_dmaengine_pcm_set_data(substream, NULL); snd_dmaengine_pcm_close_release_chan(substream); return 0; }
static int tegra_pcm_open(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct device *dev = rtd->platform->dev; struct tegra_runtime_data *prtd; int ret; if (rtd->dai_link->no_pcm) return 0; prtd = kzalloc(sizeof(struct tegra_runtime_data), GFP_KERNEL); if (prtd == NULL) return -ENOMEM; /* Set HW params now that initialization is complete */ snd_soc_set_runtime_hwparams(substream, &tegra_pcm_hardware); /* Ensure period size is multiple of 8 */ ret = snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 0x8); if (ret) { dev_err(dev, "failed to set constraint %d\n", ret); kfree(prtd); return ret; } ret = snd_dmaengine_pcm_open_request_chan(substream, NULL, NULL); if (ret) { dev_err(dev, "dmaengine pcm open failed with err %d\n", ret); kfree(prtd); return ret; } snd_dmaengine_pcm_set_data(substream, prtd); return 0; }
static int ux500_pcm_open(struct snd_pcm_substream *substream) { int stream_id = substream->pstr->stream; struct snd_pcm_runtime *runtime = substream->runtime; struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *dai = rtd->cpu_dai; struct device *dev = dai->dev; int ret; struct ux500_msp_dma_params *dma_params; u16 per_data_width, mem_data_width; struct stedma40_chan_cfg *dma_cfg; dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id, snd_pcm_stream_str(substream)); dev_dbg(dev, "%s: Set runtime hwparams.\n", __func__); if (stream_id == SNDRV_PCM_STREAM_PLAYBACK) snd_soc_set_runtime_hwparams(substream, &ux500_pcm_hw_playback); else snd_soc_set_runtime_hwparams(substream, &ux500_pcm_hw_capture); /* ensure that buffer size is a multiple of period size */ ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); if (ret < 0) { dev_err(dev, "%s: Error: snd_pcm_hw_constraints failed (%d)\n", __func__, ret); return ret; } dev_dbg(dev, "%s: Set hw-struct for %s.\n", __func__, snd_pcm_stream_str(substream)); runtime->hw = (stream_id == SNDRV_PCM_STREAM_PLAYBACK) ? ux500_pcm_hw_playback : ux500_pcm_hw_capture; mem_data_width = STEDMA40_HALFWORD_WIDTH; dma_params = snd_soc_dai_get_dma_data(dai, substream); switch (dma_params->data_size) { case 32: per_data_width = STEDMA40_WORD_WIDTH; break; case 16: per_data_width = STEDMA40_HALFWORD_WIDTH; break; case 8: per_data_width = STEDMA40_BYTE_WIDTH; break; default: per_data_width = STEDMA40_WORD_WIDTH; dev_warn(rtd->platform->dev, "%s: Unknown data-size (%d)! Assuming 32 bits.\n", __func__, dma_params->data_size); } dma_cfg = dma_params->dma_cfg; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { dma_cfg->src_info.data_width = mem_data_width; dma_cfg->dst_info.data_width = per_data_width; } else { dma_cfg->src_info.data_width = per_data_width; dma_cfg->dst_info.data_width = mem_data_width; } ret = snd_dmaengine_pcm_open(substream, stedma40_filter, dma_cfg); if (ret) { dev_dbg(dai->dev, "%s: ERROR: snd_dmaengine_pcm_open failed (%d)!\n", __func__, ret); return ret; } snd_dmaengine_pcm_set_data(substream, dma_cfg); return 0; }