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| author | Chaithrika U S <chaithrika@ti.com> | 2009-09-30 17:32:27 -0400 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-09-30 13:43:55 +0100 |
| commit | 4fa9c1a5953441e06dbde7b6a655cbf6618e61dd (patch) | |
| tree | 661628c2ba19c95bdb3dc4ecb26bb1a405e78ea8 /sound/soc/davinci/davinci-mcasp.c | |
| parent | be2500b8353d41463399e997fe8562f772dcaaba (diff) | |
| download | linux-4fa9c1a5953441e06dbde7b6a655cbf6618e61dd.tar.gz linux-4fa9c1a5953441e06dbde7b6a655cbf6618e61dd.tar.bz2 linux-4fa9c1a5953441e06dbde7b6a655cbf6618e61dd.zip | |
ASoC: DaVinci: McASP FIFO related updates
The DMA params for McASP with FIFO has been updated so that it works for
various FIFO levels. A member- 'fifo_level' has been added to the DMA
params data structure. The fifo_level can be adjusted by the tx[rx]_numevt
platform data. This is relevant only for DA8xx/OMAP-L1xx platforms. This
implementation has been tested for numevt values 1, 2, 4, 8.
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/davinci/davinci-mcasp.c')
| -rw-r--r-- | sound/soc/davinci/davinci-mcasp.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index 5d1f98a4c978..50ad0519a8fa 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -714,16 +714,13 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream, struct davinci_pcm_dma_params *dma_params = &dev->dma_params[substream->stream]; int word_length; - u8 numevt; + u8 fifo_level; davinci_hw_common_param(dev, substream->stream); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - numevt = dev->txnumevt; + fifo_level = dev->txnumevt; else - numevt = dev->rxnumevt; - - if (!numevt) - numevt = 1; + fifo_level = dev->rxnumevt; if (dev->op_mode == DAVINCI_MCASP_DIT_MODE) davinci_hw_dit_param(dev); @@ -751,12 +748,12 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream, return -EINVAL; } - if (dev->version == MCASP_VERSION_2) { - dma_params->data_type *= numevt; - dma_params->acnt = 4 * numevt; - } else + if (dev->version == MCASP_VERSION_2 && !fifo_level) + dma_params->acnt = 4; + else dma_params->acnt = dma_params->data_type; + dma_params->fifo_level = fifo_level; davinci_config_channel_size(dev, word_length); return 0; |