diff options
author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-11 10:41:07 +0300 |
---|---|---|
committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-13 08:17:18 +0300 |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/sound/soc/soc-generic-dmaengine-pcm.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/sound/soc/soc-generic-dmaengine-pcm.c')
-rw-r--r-- | kernel/sound/soc/soc-generic-dmaengine-pcm.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/kernel/sound/soc/soc-generic-dmaengine-pcm.c b/kernel/sound/soc/soc-generic-dmaengine-pcm.c index c9917ca5d..6fd1906af 100644 --- a/kernel/sound/soc/soc-generic-dmaengine-pcm.c +++ b/kernel/sound/soc/soc-generic-dmaengine-pcm.c @@ -24,6 +24,12 @@ #include <sound/dmaengine_pcm.h> +/* + * The platforms dmaengine driver does not support reporting the amount of + * bytes that are still left to transfer. + */ +#define SND_DMAENGINE_PCM_FLAG_NO_RESIDUE BIT(31) + struct dmaengine_pcm { struct dma_chan *chan[SNDRV_PCM_STREAM_LAST + 1]; const struct snd_dmaengine_pcm_config *config; @@ -222,14 +228,18 @@ static struct dma_chan *dmaengine_pcm_compat_request_channel( return snd_dmaengine_pcm_request_channel(fn, dma_data->filter_data); } -static bool dmaengine_pcm_can_report_residue(struct dma_chan *chan) +static bool dmaengine_pcm_can_report_residue(struct device *dev, + struct dma_chan *chan) { struct dma_slave_caps dma_caps; int ret; ret = dma_get_slave_caps(chan, &dma_caps); - if (ret != 0) - return true; + if (ret != 0) { + dev_warn(dev, "Failed to get DMA channel capabilities, falling back to period counting: %d\n", + ret); + return false; + } if (dma_caps.residue_granularity == DMA_RESIDUE_GRANULARITY_DESCRIPTOR) return false; @@ -289,14 +299,7 @@ static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd) if (ret) return ret; - /* - * This will only return false if we know for sure that at least - * one channel does not support residue reporting. If the DMA - * driver does not implement the slave_caps API we rely having - * the NO_RESIDUE flag set manually in case residue reporting is - * not supported. - */ - if (!dmaengine_pcm_can_report_residue(pcm->chan[i])) + if (!dmaengine_pcm_can_report_residue(dev, pcm->chan[i])) pcm->flags |= SND_DMAENGINE_PCM_FLAG_NO_RESIDUE; } |