[alsa-devel] [PATCH V0] ASoC: pxa-ssp: add TISSP mode support

Mark Brown broonie at kernel.org
Sun Nov 10 12:10:21 CET 2013

On Sun, Nov 10, 2013 at 09:50:21AM +0800, Qiao Zhou wrote:
> On 11/08/2013 06:19 PM, Mark Brown wrote:

> The SPI/NSM are not used for audio usage, and currently only PSP
> mode is used pxa-ssp driver. We have the requirement now to support
> this SSP mode. The benefit is that we don't need to configure
> detailed timing in transmit/receiving since HW handles it
> automatically.

> The SSP mode is something like the PCM format for mono stream for
> voice related scenario. In current audio format definition and
> pxa-ssp driver implementation, I don't find suitable way to handle
> it. so I add such SSP-format to differentiate it from PSP mode. Do I
> make a confusion of SSP mode and audio frame format? please help
> comment. thanks.

If this is just about programming the hardware better rather than
changing the externally visible symbols then as Daniel says it should be
handled transparently by the driver, replacing the current code for
whatever formats are handled.  Normally the same DAI format should be
configured for both CODEC and CPU so unless a new format should also be
used by CODEC drivers the update ought to be internal to the driver.
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