diff options
| author | Philipp Zabel <philipp.zabel@gmail.com> | 2009-03-19 09:32:01 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-04-02 16:34:13 +0100 |
| commit | 92429069d0fc9f52d436c9067c5b5c392e3f8876 (patch) | |
| tree | 277b74022831b4b1ec388a33e4c36e4a3a772a96 | |
| parent | 1f2186951e02f2a5bcda9459f63136918932385a (diff) | |
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>
| -rw-r--r-- | sound/soc/pxa/pxa-ssp.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c index b0bf40973d5..c7c1996a544 100644 --- a/sound/soc/pxa/pxa-ssp.c +++ b/sound/soc/pxa/pxa-ssp.c @@ -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; } |