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| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-10-08 15:07:59 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-10-19 22:26:06 +0200 |
| commit | c0de42bf595238e9dd593405ebc2992cc8470732 (patch) | |
| tree | 310c4d89773307ce86f6df8f377c3e56f423bc38 /include/sound/dmaengine_pcm.h | |
| parent | Linux 3.12-rc5 (diff) | |
| download | linux-c0de42bf595238e9dd593405ebc2992cc8470732.tar.xz linux-c0de42bf595238e9dd593405ebc2992cc8470732.zip | |
ASoC: dmaengine-pcm: Add support for querying DMA capabilities
Currently each platform making use the the generic dmaengine PCM driver still
needs to provide a custom snd_pcm_hardware struct which specifies the
capabilities of the DMA controller, e.g. the maximum period size that can be
supported. This patch adds code which uses the newly introduced
dma_get_slave_caps() API to query this information from the dmaengine driver.
The new code path will only be taken if the 'pcm_hardware' field of the
snd_dmaengine_pcm_config struct is NULL.
The patch also introduces a new 'fifo_size' field to the
snd_dmaengine_dai_dma_data struct which is used to initialize the
snd_pcm_hardware 'fifo_size' field and needs to be set by the DAI driver.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'include/sound/dmaengine_pcm.h')
| -rw-r--r-- | include/sound/dmaengine_pcm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h index f11c35cd5532..83b2c3e95a1a 100644 --- a/include/sound/dmaengine_pcm.h +++ b/include/sound/dmaengine_pcm.h @@ -61,6 +61,7 @@ struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream) * @slave_id: Slave requester id for the DMA channel. * @filter_data: Custom DMA channel filter data, this will usually be used when * requesting the DMA channel. + * @fifo_size: FIFO size of the DAI controller in bytes */ struct snd_dmaengine_dai_dma_data { dma_addr_t addr; @@ -68,6 +69,7 @@ struct snd_dmaengine_dai_dma_data { u32 maxburst; unsigned int slave_id; void *filter_data; + unsigned int fifo_size; }; void snd_dmaengine_pcm_set_config_from_dai_data( |