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-rw-r--r--Documentation/sound/soc/index.rst1
-rw-r--r--Documentation/sound/soc/platform.rst (renamed from Documentation/sound/alsa/soc/platform.txt)31
2 files changed, 18 insertions, 14 deletions
diff --git a/Documentation/sound/soc/index.rst b/Documentation/sound/soc/index.rst
index 0c0c38e582b4..c5a55195bf4d 100644
--- a/Documentation/sound/soc/index.rst
+++ b/Documentation/sound/soc/index.rst
@@ -11,3 +11,4 @@ The documentation is spilt into the following sections:-
codec
dai
dapm
+ platform
diff --git a/Documentation/sound/alsa/soc/platform.txt b/Documentation/sound/soc/platform.rst
index 3a08a2c9150c..d5574904d981 100644
--- a/Documentation/sound/alsa/soc/platform.txt
+++ b/Documentation/sound/soc/platform.rst
@@ -1,3 +1,4 @@
+====================
ASoC Platform Driver
====================
@@ -9,21 +10,23 @@ Audio DMA
=========
The platform DMA driver optionally supports the following ALSA operations:-
+::
-/* SoC audio ops */
-struct snd_soc_ops {
+ /* SoC audio ops */
+ struct snd_soc_ops {
int (*startup)(struct snd_pcm_substream *);
void (*shutdown)(struct snd_pcm_substream *);
int (*hw_params)(struct snd_pcm_substream *, struct snd_pcm_hw_params *);
int (*hw_free)(struct snd_pcm_substream *);
int (*prepare)(struct snd_pcm_substream *);
int (*trigger)(struct snd_pcm_substream *, int);
-};
+ };
The platform driver exports its DMA functionality via struct
snd_soc_platform_driver:-
+::
-struct snd_soc_platform_driver {
+ struct snd_soc_platform_driver {
char *name;
int (*probe)(struct platform_device *pdev);
@@ -44,7 +47,7 @@ struct snd_soc_platform_driver {
/* platform stream ops */
struct snd_pcm_ops *pcm_ops;
-};
+ };
Please refer to the ALSA driver documentation for details of audio DMA.
http://www.alsa-project.org/~iwai/writing-an-alsa-driver/
@@ -57,11 +60,11 @@ SoC DAI Drivers
Each SoC DAI driver must provide the following features:-
- 1) Digital audio interface (DAI) description
- 2) Digital audio interface configuration
- 3) PCM's description
- 4) SYSCLK configuration
- 5) Suspend and resume (optional)
+1. Digital audio interface (DAI) description
+2. Digital audio interface configuration
+3. PCM's description
+4. SYSCLK configuration
+5. Suspend and resume (optional)
Please see codec.txt for a description of items 1 - 4.
@@ -71,9 +74,9 @@ SoC DSP Drivers
Each SoC DSP driver usually supplies the following features :-
- 1) DAPM graph
- 2) Mixer controls
- 3) DMA IO to/from DSP buffers (if applicable)
- 4) Definition of DSP front end (FE) PCM devices.
+1. DAPM graph
+2. Mixer controls
+3. DMA IO to/from DSP buffers (if applicable)
+4. Definition of DSP front end (FE) PCM devices.
Please see DPCM.txt for a description of item 4.