ASoC: Use network mode with 2 slots for 16-bit stereo in pxa-ssp/Zylonite

For consistency with 24-bit and 32-bit modes, don't send 16-bit stereo
in one 32-bit transfer. Use 2 slots instead on Zylonite. It should result
in exactly the same behaviour.
Now it is possible to use 16-bit single slot transfers in pxa-ssp, which
are needed for Magician to get two frame clock pulses per sample
(one for each channel).

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Tested-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c
index 4a973ab..c49bb12 100644 (file)
--- a/sound/soc/pxa/pxa-ssp.c
+++ b/sound/soc/pxa/pxa-ssp.c
@@ -644,8 +644,7 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
                        sscr0 |= SSCR0_FPCKE;
 #endif
                sscr0 |= SSCR0_DataSize(16);
-               if (params_channels(params) > 1)
-                       sscr0 |= SSCR0_EDSS;
+               /* use network mode (2 slots) for 16 bit stereo */
                break;
        case SNDRV_PCM_FORMAT_S24_LE:
                sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));

diff --git a/sound/soc/pxa/zylonite.c b/sound/soc/pxa/zylonite.c
index 0140a25..9f6116e 100644 (file)
--- a/sound/soc/pxa/zylonite.c
+++ b/sound/soc/pxa/zylonite.c
@@ -127,8 +127,11 @@ static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
        if (ret < 0)
                return ret;
 
-       /* We're not really in network mode but the emulation wants this. */
-       ret = snd_soc_dai_set_tdm_slot(cpu_dai, 1, 1);
+       /* Use network mode for stereo, one slot per channel. */
+       if (params_channels(params) > 1)
+               ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0x3, 2);
+       else
+               ret = snd_soc_dai_set_tdm_slot(cpu_dai, 1, 1);
        if (ret < 0)
                return ret;