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authorTimur Tabi <timur@freescale.com>2011-06-08 20:02:56 (GMT)
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-06-09 10:53:11 (GMT)
commit0cd114fff9ace7014c0d3ef8ab385fc5d3cf2d2f (patch)
tree60cb1a86cad6a267a1bbf3139776c6771ec1cd50
parent3115ae174620eeab4b16f52c8d0a9a35d2717e3c (diff)
downloadlinux-0cd114fff9ace7014c0d3ef8ab385fc5d3cf2d2f.tar.xz
ASoC: fsl: fix initialization of DMA buffers
The DMA (PCM) driver used by some Freescale PowerPC supports separate DAIs for playback and capture, so DMA buffers should be allocated only for the initialized streams. Instead of checking for the number of active channels, which apparently is not reliable, check to see if the actual stream object exists. Also provide a better name for the DMA interrupt. Signed-off-by: Timur Tabi <timur@freescale.com> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
-rw-r--r--sound/soc/fsl/fsl_dma.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/sound/soc/fsl/fsl_dma.c b/sound/soc/fsl/fsl_dma.c
index 15dac0f..6680c0b 100644
--- a/sound/soc/fsl/fsl_dma.c
+++ b/sound/soc/fsl/fsl_dma.c
@@ -310,7 +310,7 @@ static int fsl_dma_new(struct snd_card *card, struct snd_soc_dai *dai,
* should allocate a DMA buffer only for the streams that are valid.
*/
- if (dai->driver->playback.channels_min) {
+ if (pcm->streams[0].substream) {
ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, card->dev,
fsl_dma_hardware.buffer_bytes_max,
&pcm->streams[0].substream->dma_buffer);
@@ -320,13 +320,13 @@ static int fsl_dma_new(struct snd_card *card, struct snd_soc_dai *dai,
}
}
- if (dai->driver->capture.channels_min) {
+ if (pcm->streams[1].substream) {
ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, card->dev,
fsl_dma_hardware.buffer_bytes_max,
&pcm->streams[1].substream->dma_buffer);
if (ret) {
- snd_dma_free_pages(&pcm->streams[0].substream->dma_buffer);
dev_err(card->dev, "can't alloc capture dma buffer\n");
+ snd_dma_free_pages(&pcm->streams[0].substream->dma_buffer);
return ret;
}
}
@@ -449,7 +449,8 @@ static int fsl_dma_open(struct snd_pcm_substream *substream)
dma_private->ld_buf_phys = ld_buf_phys;
dma_private->dma_buf_phys = substream->dma_buffer.addr;
- ret = request_irq(dma_private->irq, fsl_dma_isr, 0, "DMA", dma_private);
+ ret = request_irq(dma_private->irq, fsl_dma_isr, 0, "fsldma-audio",
+ dma_private);
if (ret) {
dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
dma_private->irq, ret);