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authorStephen Warren <swarren@nvidia.com>2012-09-06 17:47:33 -0600
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-09-07 09:52:02 +0800
commita32826e4aefa905b392d2d862d51365d50d4829b (patch)
tree3a3403726f2f43f5753d3a29619cc32d7639ce07 /sound
parent57b2d68863f281737d8596cb3d76d89d9cc54fd8 (diff)
downloadlinux-a32826e4aefa905b392d2d862d51365d50d4829b.tar.bz2
ASoC: tegra: fix maxburst settings in dmaengine code
The I2S controllers are programmed with an "attention" level of 4 DWORDs. This must match the configuration passed to the DMA driver, so that when they burst in data, they don't overflow the available FIFO space. Also, the burst size is relevant to the destination for playback, and source for capture, not vice-versa as originally written. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/tegra/tegra_pcm.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/soc/tegra/tegra_pcm.c b/sound/soc/tegra/tegra_pcm.c
index 5658bcec1931..8d6900c1ee47 100644
--- a/sound/soc/tegra/tegra_pcm.c
+++ b/sound/soc/tegra/tegra_pcm.c
@@ -334,11 +334,11 @@ static int tegra_pcm_hw_params(struct snd_pcm_substream *substream,
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
slave_config.dst_addr = dmap->addr;
- slave_config.src_maxburst = 0;
+ slave_config.dst_maxburst = 4;
} else {
slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
slave_config.src_addr = dmap->addr;
- slave_config.dst_maxburst = 0;
+ slave_config.src_maxburst = 4;
}
slave_config.slave_id = dmap->req_sel;