diff options
| author | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2018-11-15 18:13:20 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-12-14 12:43:41 +0000 |
| commit | ba02eed9f300b6512181d526311d4e11aaa9714f (patch) | |
| tree | 3019142761732d9b5eb0214d3e47ec3316e38c7a /include/sound | |
| parent | 35bc99aaa1a3af23cf78b6b56f14230b5da3993b (diff) | |
| download | linux-ba02eed9f300b6512181d526311d4e11aaa9714f.tar.bz2 | |
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>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/compress_driver.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h index ea8c93bbb0e0..0cdc3999ecfa 100644 --- a/include/sound/compress_driver.h +++ b/include/sound/compress_driver.h @@ -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); |