[alsa-devel] [PATCH] *** ASoC: core: refine of node id parse of cpu/codec dai ***

[Qiao Zhou]

On 06/18/2014 08:13 PM, Lars-Peter Clausen wrote:
> On 06/18/2014 01:01 PM, Qiao Zhou wrote:
>> Hi Mark, Liam
>>
>> This patch is to add another check besides cpu_dai/codec_dai name during
>> dai_link bind. currently if the cpu_dai/codec_dai name match corresponding
>> dai_link cpu/codec name, then a match is found. in this patch, it also checks
>> whether cpu/codec dai id match dailink cpu_dai_id/codec_dai_id. Still check
>> name first.
>> 1. if it doesn't match, it will keep checking whether cpu_id/codec_id match
>> corresponding dai_link cpu_dai_id/codec_dai_id. if the ids are equal, then
>> a match is found.
>> 2. if it does match, then a match is already found. no need to further check.
>>
> [...]
>> Could you help share your opinions? Thanks in advance.
>
> Hi,
>
> There is already snd_soc_of_get_dai_name() which will translate a phandle +
> specifier to a DAI name. By default it will use the DAI id for the
> specifier. Alternatively the driver can implement a of_xlate_dai_name
> callback that does the translation from specifier to name. The advantage of
> this approach is that the board driver does not need to know about the
> specific format of the DAI specifier.
>
> - Lars
>
Hi Lars,

This API is powerful and meets my requirement. Thanks a lot.

I still have a small question. why don't we consider to also use DAI id 
to match DAIs & dai_link? It seems to be a more direct alternative. 
Please correct/instruct me if anything is wrong.

-- 

Best Regards
Qiao