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Unverified Commit ba02eed9 authored by Srinivas Kandagatla's avatar Srinivas Kandagatla Committed by Mark Brown
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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: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 35bc99aa

include/sound/compress_driver.h

+19 −0
Original line number Diff line number Diff line
@@ -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);