On 12/02/2013 07:00 PM, Lee Jones wrote:
> The Slave Config's addr_width attribute is populated by data_width of
> dma_cfg, which in turn is derived from dma_params' data_size attribute
> and that comes from the slot_width which is always 16 bits (2 Bytes).
> We're cutting out the middle man here and just setting the DMA Slave
> Config directly.
>
> Cc: alsa-de...@alsa-project.org
> Signed-off-by: Lee Jones <lee.jo...@linaro.org>
Patch looks good. But as a follow up patch I think you can now switch to the
generic snd_dmaengine_pcm_prepare_slave_config.
> ---
> sound/soc/ux500/ux500_pcm.c | 13 ++++++-------
> 1 file changed, 6 insertions(+), 7 deletions(-)
>
> diff --git a/sound/soc/ux500/ux500_pcm.c b/sound/soc/ux500/ux500_pcm.c
> index 6162f70..2f1bdb7 100644
> --- a/sound/soc/ux500/ux500_pcm.c
> +++ b/sound/soc/ux500/ux500_pcm.c
> @@ -104,26 +104,25 @@ static int ux500_pcm_prepare_slave_config(struct
> snd_pcm_substream *substream,
> struct dma_slave_config *slave_config)
> {
> struct snd_soc_pcm_runtime *rtd = substream->private_data;
> - struct ux500_msp_dma_params *dma_params;
> - struct stedma40_chan_cfg *dma_cfg;
> + struct snd_dmaengine_dai_dma_data *dma_params;
> int ret;
>
> dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
> - dma_cfg = dma_params->dma_cfg;
>
> ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
> if (ret)
> return ret;
>
> slave_config->dst_maxburst = 4;
> - slave_config->dst_addr_width = dma_cfg->dst_info.data_width;
> slave_config->src_maxburst = 4;
> - slave_config->src_addr_width = dma_cfg->src_info.data_width;
> +
> + slave_config->src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
> + slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
>
> if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
> - slave_config->dst_addr = dma_params->tx_rx_addr;
> + slave_config->dst_addr = dma_params->addr;
> else
> - slave_config->src_addr = dma_params->tx_rx_addr;
> + slave_config->src_addr = dma_params->addr;
>
> return 0;
> }
>
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