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@xxxxxxxxxx>
---
include/sound/compress_driver.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
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);
--
2.19.1
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