[alsa-devel] DMA interrupt not getting triggered(nailed the problem need solution)

[James Courtier-Dutton]

On 8 February 2010 02:34, ANISH KUMAR <anish.singh at samsung.com> wrote:
>
> Hi All,
>
> This problem is due to ETIMEDOUT(timeout) happening in s3c_snd_lrsync function(called by trigger).
> As i understand this could be due I2S being broken. This basically happens because
> of improper initialization of CPU or CODEC.
>
> But if that is the case then it would not have produced sound initially also but that
> is not the case(initially it is ringing i.e. interrupt coming for a short time then after i am getting time out problem)??
> After this sound is not coming this happens when it does the initialisation again using open,
> prepare,enqueue and so on.
>
> Please provide any pointers which can help me out.
>

Check the master/slave mode at each end of the CPU to CODEC link.
If both are master or both are slave you could see issues similar to
what you are seeing.