diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h index 1ef13bcdc43f..9472f0a966a2 100644 --- a/include/sound/dmaengine_pcm.h +++ b/include/sound/dmaengine_pcm.h @@ -69,6 +69,10 @@ struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream) * @peripheral_config: peripheral configuration for programming peripheral * for dmaengine transfer * @peripheral_size: peripheral configuration buffer size + * @port_window_size: The length of the register area in words the data need + * to be accessed on the device side. It is only used for devices which is using + * an area instead of a single register to send/receive the data. Typically the + * DMA loops in this area in order to transfer the data. */ struct snd_dmaengine_dai_dma_data { dma_addr_t addr; @@ -80,6 +84,7 @@ struct snd_dmaengine_dai_dma_data { unsigned int flags; void *peripheral_config; size_t peripheral_size; + u32 port_window_size; }; void snd_dmaengine_pcm_set_config_from_dai_data( diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c index 72040964b6fd..f0c17503df42 100644 --- a/sound/core/pcm_dmaengine.c +++ b/sound/core/pcm_dmaengine.c @@ -111,6 +111,7 @@ void snd_dmaengine_pcm_set_config_from_dai_data( if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { slave_config->dst_addr = dma_data->addr; slave_config->dst_maxburst = dma_data->maxburst; + slave_config->dst_port_window_size = dma_data->port_window_size; if (dma_data->flags & SND_DMAENGINE_PCM_DAI_FLAG_PACK) slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_UNDEFINED; @@ -119,6 +120,7 @@ void snd_dmaengine_pcm_set_config_from_dai_data( } else { slave_config->src_addr = dma_data->addr; slave_config->src_maxburst = dma_data->maxburst; + slave_config->src_port_window_size = dma_data->port_window_size; if (dma_data->flags & SND_DMAENGINE_PCM_DAI_FLAG_PACK) slave_config->src_addr_width = DMA_SLAVE_BUSWIDTH_UNDEFINED;