static void abe_dbg_stop_dma(struct omap_abe *abe)
{
/* Since we are using self linking, there is a
chance that the DMA as re-enabled the channel just after disabling it */
while (omap_get_dma_active_status(abe->debugfs.dma_ch))
omap_stop_dma(abe->debugfs.dma_ch);
if (abe->debugfs.circular)
omap_dma_unlink_lch(abe->debugfs.dma_ch, abe->debugfs.dma_ch);
omap_free_dma(abe->debugfs.dma_ch);
pm_runtime_put_sync(abe->dev);
}
static int omap_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
if (prtd->dma_data == NULL)
return 0;
omap_dma_unlink_lch(prtd->dma_ch, prtd->dma_ch);
omap_free_dma(prtd->dma_ch);
prtd->dma_data = NULL;
snd_pcm_set_runtime_buffer(substream, NULL);
return 0;
}
/***************************************************************************************
*
* DMA channel requests Freeing
*
**************************************************************************************/
static void omap_sound_dma_unlink_lch(void *data)
{
audio_stream_t *s = (audio_stream_t *) data;
int *chan = s->lch;
int i;
FN_IN;
if (!s->linked) {
FN_OUT(1);
return;
}
for (i = 0; i < nr_linked_channels; i++) {
int cur_chan = chan[i];
int nex_chan =
((nr_linked_channels - 1 ==
i) ? chan[0] : chan[i + 1]);
omap_dma_unlink_lch(cur_chan, nex_chan);
}
s->linked = 0;
FN_OUT(0);
}