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ASoC: Docs: Platform update

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Update the platform class driver documentation and bring it up to date
with the current code base. This includes multi component and DSP.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Liam Girdwood 2013-09-20 18:19:06 +01:00 committed by Mark Brown
parent da5feefeda
commit 3eb012834b
1 changed files with 16 additions and 3 deletions
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19
Documentation/sound/alsa/soc/platform.txt
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@ -1,9 +1,9 @@
ASoC Platform Driver
====================
An ASoC platform driver can be divided into audio DMA and SoC DAI configuration
and control. The platform drivers only target the SoC CPU and must have no board
specific code.
An ASoC platform driver class can be divided into audio DMA drivers, SoC DAI
drivers and DSP drivers. The platform drivers only target the SoC CPU and must
have no board specific code.
Audio DMA
=========
@ -64,3 +64,16 @@ Each SoC DAI driver must provide the following features:-
5) Suspend and resume (optional)
Please see codec.txt for a description of items 1 - 4.
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.
Please see DPCM.txt for a description of item 4.