ASoC: pxa-ssp: Use 16-bit DMA for magician stereo
Now magician and similar boards can use network mode with only one active slot to explicitly set 16 bit frame width, even for S16_LE stereo sound. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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@ -627,12 +627,18 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
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u32 sscr0;
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u32 sspsp;
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int width = snd_pcm_format_physical_width(params_format(params));
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int ttsa = ssp_read_reg(ssp, SSTSA) & 0xf;
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/* select correct DMA params */
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if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
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dma = 1; /* capture DMA offset is 1,3 */
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if (chn == 2)
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dma += 2; /* stereo DMA offset is 2, mono is 0 */
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/* Network mode with one active slot (ttsa == 1) can be used
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* to force 16-bit frame width on the wire (for S16_LE), even
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* with two channels. Use 16-bit DMA transfers for this case.
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*/
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if (((chn == 2) && (ttsa != 1)) || (width == 32))
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dma += 2; /* 32-bit DMA offset is 2, 16-bit is 0 */
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cpu_dai->dma_data = ssp_dma_params[cpu_dai->id][dma];
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dev_dbg(&ssp->pdev->dev, "pxa_ssp_hw_params: dma %d\n", dma);
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@ -712,7 +718,7 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
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/* When we use a network mode, we always require TDM slots
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* - complain loudly and fail if they've not been set up yet.
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*/
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if ((sscr0 & SSCR0_MOD) && !(ssp_read_reg(ssp, SSTSA) & 0xf)) {
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if ((sscr0 & SSCR0_MOD) && !ttsa) {
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dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
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return -EINVAL;
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}
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