diff options
| -rw-r--r-- | sound/soc/omap/omap-mcbsp.c | 47 | ||||
| -rw-r--r-- | sound/soc/omap/omap-pcm.c | 7 | ||||
| -rw-r--r-- | sound/soc/omap/omap-pcm.h | 2 |
3 files changed, 49 insertions, 7 deletions
diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c index 6e855080e6ea..580de5a8dba6 100644 --- a/sound/soc/omap/omap-mcbsp.c +++ b/sound/soc/omap/omap-mcbsp.c @@ -139,28 +139,59 @@ static const unsigned long omap34xx_mcbsp_port[][2] = { static const unsigned long omap34xx_mcbsp_port[][2] = {}; #endif +static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; + struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data); + int samples = snd_pcm_lib_period_bytes(substream) >> 1; + + /* Configure McBSP internal buffer usage */ + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + omap_mcbsp_set_tx_threshold(mcbsp_data->bus_id, samples - 1); + else + omap_mcbsp_set_rx_threshold(mcbsp_data->bus_id, samples - 1); +} + static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data); + int bus_id = mcbsp_data->bus_id; int err = 0; - if (cpu_is_omap343x() && mcbsp_data->bus_id == 1) { + if (!cpu_dai->active) + err = omap_mcbsp_request(bus_id); + + if (cpu_is_omap343x()) { + int max_period; + /* * McBSP2 in OMAP3 has 1024 * 32-bit internal audio buffer. * Set constraint for minimum buffer size to the same than FIFO * size in order to avoid underruns in playback startup because * HW is keeping the DMA request active until FIFO is filled. */ + if (bus_id == 1) + snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_BUFFER_BYTES, + 4096, UINT_MAX); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + max_period = omap_mcbsp_get_max_tx_threshold(bus_id); + else + max_period = omap_mcbsp_get_max_rx_threshold(bus_id); + + max_period++; + max_period <<= 1; + snd_pcm_hw_constraint_minmax(substream->runtime, - SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4096, UINT_MAX); + SNDRV_PCM_HW_PARAM_PERIOD_BYTES, + 32, max_period); } - if (!cpu_dai->active) - err = omap_mcbsp_request(mcbsp_data->bus_id); - return err; } @@ -220,7 +251,7 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream, struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data); struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs; int dma, bus_id = mcbsp_data->bus_id, id = cpu_dai->id; - int wlen, channels, wpf; + int wlen, channels, wpf, sync_mode = OMAP_DMA_SYNC_ELEMENT; unsigned long port; unsigned int format; @@ -236,6 +267,9 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream, } else if (cpu_is_omap343x()) { dma = omap24xx_dma_reqs[bus_id][substream->stream]; port = omap34xx_mcbsp_port[bus_id][substream->stream]; + omap_mcbsp_dai_dma_params[id][substream->stream].set_threshold = + omap_mcbsp_set_threshold; + sync_mode = OMAP_DMA_SYNC_FRAME; } else { return -ENODEV; } @@ -243,6 +277,7 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream, substream->stream ? "Audio Capture" : "Audio Playback"; omap_mcbsp_dai_dma_params[id][substream->stream].dma_req = dma; omap_mcbsp_dai_dma_params[id][substream->stream].port_addr = port; + omap_mcbsp_dai_dma_params[id][substream->stream].sync_mode = sync_mode; cpu_dai->dma_data = &omap_mcbsp_dai_dma_params[id][substream->stream]; if (mcbsp_data->configured) { diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c index b9633d5a9557..5735945788bf 100644 --- a/sound/soc/omap/omap-pcm.c +++ b/sound/soc/omap/omap-pcm.c @@ -162,7 +162,7 @@ static int omap_pcm_prepare(struct snd_pcm_substream *substream) */ dma_params.data_type = OMAP_DMA_DATA_TYPE_S16; dma_params.trigger = dma_data->dma_req; - dma_params.sync_mode = OMAP_DMA_SYNC_ELEMENT; + dma_params.sync_mode = dma_data->sync_mode; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { dma_params.src_amode = OMAP_DMA_AMODE_POST_INC; dma_params.dst_amode = OMAP_DMA_AMODE_CONSTANT; @@ -205,6 +205,7 @@ static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_pcm_runtime *runtime = substream->runtime; struct omap_runtime_data *prtd = runtime->private_data; + struct omap_pcm_dma_data *dma_data = prtd->dma_data; unsigned long flags; int ret = 0; @@ -214,6 +215,10 @@ static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd) case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: prtd->period_index = 0; + /* Configure McBSP internal buffer usage */ + if (dma_data->set_threshold) + dma_data->set_threshold(substream); + omap_start_dma(prtd->dma_ch); break; diff --git a/sound/soc/omap/omap-pcm.h b/sound/soc/omap/omap-pcm.h index 8d9d26916b05..38a821dd4118 100644 --- a/sound/soc/omap/omap-pcm.h +++ b/sound/soc/omap/omap-pcm.h @@ -29,6 +29,8 @@ struct omap_pcm_dma_data { char *name; /* stream identifier */ int dma_req; /* DMA request line */ unsigned long port_addr; /* transmit/receive register */ + int sync_mode; /* DMA sync mode */ + void (*set_threshold)(struct snd_pcm_substream *substream); }; extern struct snd_soc_platform omap_soc_platform; |
