diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/davinci/davinci-mcasp.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index a01c6db6017b..f8417072c66b 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -107,6 +107,7 @@ struct davinci_mcasp { #endif struct davinci_mcasp_ruledata ruledata[2]; + struct snd_pcm_hw_constraint_list chconstr[2]; }; static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset, @@ -1119,6 +1120,11 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream, SNDRV_PCM_HW_PARAM_CHANNELS, 2, max_channels); + if (mcasp->chconstr[substream->stream].count) + snd_pcm_hw_constraint_list(substream->runtime, + 0, SNDRV_PCM_HW_PARAM_CHANNELS, + &mcasp->chconstr[substream->stream]); + /* * If we rely on implicit BCLK divider setting we should * set constraints based on what we can provide. @@ -1498,6 +1504,59 @@ nodata: return pdata; } +/* All serializers must have equal number of channels */ +static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, + struct snd_pcm_hw_constraint_list *cl, + int serializers) +{ + unsigned int *list; + int i, count = 0; + + if (serializers <= 1) + return 0; + + list = devm_kzalloc(mcasp->dev, sizeof(unsigned int) * + (mcasp->tdm_slots + serializers - 2), + GFP_KERNEL); + if (!list) + return -ENOMEM; + + for (i = 2; i <= mcasp->tdm_slots; i++) + list[count++] = i; + + for (i = 2; i <= serializers; i++) + list[count++] = i*mcasp->tdm_slots; + + cl->count = count; + cl->list = list; + + return 0; +} + + +static int davinci_mcasp_init_ch_constraints(struct davinci_mcasp *mcasp) +{ + int rx_serializers = 0, tx_serializers = 0, ret, i; + + for (i = 0; i < mcasp->num_serializer; i++) + if (mcasp->serial_dir[i] == TX_MODE) + tx_serializers++; + else if (mcasp->serial_dir[i] == RX_MODE) + rx_serializers++; + + ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[ + SNDRV_PCM_STREAM_PLAYBACK], + tx_serializers); + if (ret) + return ret; + + ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[ + SNDRV_PCM_STREAM_CAPTURE], + rx_serializers); + + return ret; +} + static int davinci_mcasp_probe(struct platform_device *pdev) { struct snd_dmaengine_dai_dma_data *dma_data; @@ -1681,6 +1740,10 @@ static int davinci_mcasp_probe(struct platform_device *pdev) mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE; } + ret = davinci_mcasp_init_ch_constraints(mcasp); + if (ret) + goto err; + dev_set_drvdata(&pdev->dev, mcasp); mcasp_reparent_fck(pdev); |