diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/saa7134/saa7134-alsa.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c index c6f7279669c1..b9c5cf7dc849 100644 --- a/drivers/media/video/saa7134/saa7134-alsa.c +++ b/drivers/media/video/saa7134/saa7134-alsa.c @@ -543,8 +543,10 @@ static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream, V4L functions, and force ALSA to use that as the DMA area */ substream->runtime->dma_area = dev->dmasound.dma.vmalloc; + substream->runtime->dma_bytes = dev->dmasound.bufsize; + substream->runtime->dma_addr = 0; - return 1; + return 0; } @@ -652,6 +654,17 @@ static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream) } /* + * page callback (needed for mmap) + */ + +static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream, + unsigned long offset) +{ + void *pageptr = substream->runtime->dma_area + offset; + return vmalloc_to_page(pageptr); +} + +/* * ALSA capture callbacks definition */ @@ -664,6 +677,7 @@ static struct snd_pcm_ops snd_card_saa7134_capture_ops = { .prepare = snd_card_saa7134_capture_prepare, .trigger = snd_card_saa7134_capture_trigger, .pointer = snd_card_saa7134_capture_pointer, + .page = snd_card_saa7134_page, }; /* |