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ALSA: soc-compress: add support to snd_compr_set_runtime_buffer() 

Existing compress offload code allocates data buffers using simple kmalloc,
however there are situations where these buffers have to be mapped
in smmu. So provide a way to set the runtime buffer by the driver itself,
simillar to what we do with pcm.

This patch adds support to set runtime dma buffer on compressed stream.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Srinivas Kandagatla 2018-11-15 18:13:20 +00:00 committed by Mark Brown
parent 35bc99aaa1
commit ba02eed9f3
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1 changed files with 19 additions and 0 deletions
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19
include/sound/compress_driver.h
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@ -23,6 +23,7 @@ struct snd_compr_ops;
* struct snd_compr_runtime: runtime stream description
* @state: stream state
* @ops: pointer to DSP callbacks
* @dma_buffer_p: runtime dma buffer pointer
* @buffer: pointer to kernel buffer, valid only when not in mmap mode or
* DSP doesn't implement copy
* @buffer_size: size of the above buffer
@ -37,6 +38,7 @@ struct snd_compr_ops;
struct snd_compr_runtime {
snd_pcm_state_t state;
struct snd_compr_ops *ops;
struct snd_dma_buffer *dma_buffer_p;
void *buffer;
u64 buffer_size;
u32 fragment_size;
@ -175,6 +177,23 @@ static inline void snd_compr_drain_notify(struct snd_compr_stream *stream)
wake_up(&stream->runtime->sleep);
}
/**
* snd_compr_set_runtime_buffer - Set the Compress runtime buffer
* @substream: compress substream to set
* @bufp: the buffer information, NULL to clear
*
* Copy the buffer information to runtime buffer when @bufp is non-NULL.
* Otherwise it clears the current buffer information.
*/
static inline void snd_compr_set_runtime_buffer(
struct snd_compr_stream *substream,
struct snd_dma_buffer *bufp)
{
struct snd_compr_runtime *runtime = substream->runtime;
runtime->dma_buffer_p = bufp;
}
int snd_compr_stop_error(struct snd_compr_stream *stream,
snd_pcm_state_t state);