diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/sound/soc/index.rst | 1 | ||||
| -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. |