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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2018-11-15 18:13:20 +0000
committerMark Brown <broonie@kernel.org>2018-12-14 12:43:41 +0000
commitba02eed9f300b6512181d526311d4e11aaa9714f (patch)
tree3019142761732d9b5eb0214d3e47ec3316e38c7a /include/sound
parent35bc99aaa1a3af23cf78b6b56f14230b5da3993b (diff)
downloadlinux-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.h19
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);