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ASoC: pxa-ssp: Use 16-bit DMA for magician stereo

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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>
This commit is contained in:
Philipp Zabel 2009-03-19 09:32:01 +01:00 committed by Mark Brown
parent 1f2186951e
commit 92429069d0
1 changed files with 9 additions and 3 deletions
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12
sound/soc/pxa/pxa-ssp.c
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@ -627,12 +627,18 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
u32 sscr0;
u32 sspsp;
int width = snd_pcm_format_physical_width(params_format(params));
int ttsa = ssp_read_reg(ssp, SSTSA) & 0xf;
/* select correct DMA params */
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
dma = 1; /* capture DMA offset is 1,3 */
if (chn == 2)
dma += 2; /* stereo DMA offset is 2, mono is 0 */
/* Network mode with one active slot (ttsa == 1) can be used
* to force 16-bit frame width on the wire (for S16_LE), even
* with two channels. Use 16-bit DMA transfers for this case.
*/
if (((chn == 2) && (ttsa != 1)) || (width == 32))
dma += 2; /* 32-bit DMA offset is 2, 16-bit is 0 */
cpu_dai->dma_data = ssp_dma_params[cpu_dai->id][dma];
dev_dbg(&ssp->pdev->dev, "pxa_ssp_hw_params: dma %d\n", dma);
@ -712,7 +718,7 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
/* When we use a network mode, we always require TDM slots
* - complain loudly and fail if they've not been set up yet.
*/
if ((sscr0 & SSCR0_MOD) && !(ssp_read_reg(ssp, SSTSA) & 0xf)) {
if ((sscr0 & SSCR0_MOD) && !ttsa) {
dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
return -EINVAL;
}