diff options
| author | Troy Kisky <troy.kisky@boundarydevices.com> | 2009-11-18 17:49:53 -0700 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-11-19 10:48:08 +0000 |
| commit | 1e224f322bf22280957a5f76164d848526ed9b08 (patch) | |
| tree | bdf7af09be46172aa6048bb25fda35980e8b2159 /sound/soc/davinci/davinci-i2s.c | |
| parent | 1587ea31572e25a0a2c9c491b7f8c937b6c0454e (diff) | |
| download | linux-1e224f322bf22280957a5f76164d848526ed9b08.tar.gz linux-1e224f322bf22280957a5f76164d848526ed9b08.tar.bz2 linux-1e224f322bf22280957a5f76164d848526ed9b08.zip | |
ASoC: DaVinci: pcm, fix underrun by using sram
Fix underruns by using dma to copy 1st to sram
in a ping/pong buffer style and then copying from
the sram to the ASP. This also has the advantage
of tolerating very long interrupt latency on dma
completion.
Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/davinci/davinci-i2s.c')
| -rw-r--r-- | sound/soc/davinci/davinci-i2s.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sound/soc/davinci/davinci-i2s.c b/sound/soc/davinci/davinci-i2s.c index b2a5372ef72c..6362ca05506e 100644 --- a/sound/soc/davinci/davinci-i2s.c +++ b/sound/soc/davinci/davinci-i2s.c @@ -545,8 +545,13 @@ static int davinci_i2s_probe(struct platform_device *pdev) ret = -ENOMEM; goto err_release_region; } - if (pdata) + if (pdata) { dev->enable_channel_combine = pdata->enable_channel_combine; + dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].sram_size = + pdata->sram_size_playback; + dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].sram_size = + pdata->sram_size_capture; + } dev->clk = clk_get(&pdev->dev, NULL); if (IS_ERR(dev->clk)) { ret = -ENODEV; |