[alsa-devel] Separate dma driver for cpu_dais

Joonyoung Shim jy0922.shim at samsung.com
Wed Feb 17 08:37:21 CET 2010

On 2/17/2010 4:24 PM, jassi brar wrote:
> On Wed, Feb 17, 2010 at 3:58 PM, Joonyoung Shim <jy0922.shim at samsung.com> wrote:
>> Additionally, i have one more question.
>> At the ASoC, is there a situation to share the dai(cpu or codec)?
> Currently, ASOC doesn't allow sharing cpu or codec dai.
>> If the dai is shared, i just think the ASoC core cannot support it.
> Correct.
>> There is the case at the S5PC1XX, it supports the hardware mixing by
>> using two tx fifo. First Jassi implemented codes using each other cpu
>> dai as Jassi says at the above for the hardware mixing, but it should
>> share codec_dai and need some modification of ASoC core.
>> (I can see codes at the below url
>> http://git.kernel.org/?p=linux/kernel/git/kki_ap/linux-2.6-samsung.git)
>> Jassi, how do you think about this?
> Though outside this topic, please see latest code from samsung GIT.
> I already share wm8580 dai with I2S primary_fifo dai as well
> as secondary_fifo dai. I implemented temporary workaround to share
> dais(luckily codec_dai wasn't used in a way to make it impossible,
> though cpu_dai still can't be shared).
> Also, there is some reason I didn't point to our repository:- the code is
> not meant for mainline. It's just a 'workaround' for urgent requirement.

I think even if it is workaround, the codes orient should go to the 
right side. Anyway, i just wonder about sharing the dai and supporting 
it at the ASoC.

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