[alsa-devel] Testing SAI with mainline

[Nicolin Chen]

On Mon, Mar 07, 2016 at 05:44:08PM -0300, Fabio Estevam wrote:
> Hi,
> 
> I am trying to get SAI to work on a mx6sx sdb board.
> 
> Here are the changes I made:
> http://pastebin.com/aq32B24v

Can't access your link.
 
> I can see the driver getting probed:
> 
> [    2.198276] fsl-asoc-card sound: wm8962 <-> 21d4000.sai mapping ok
> 
> ,but when attempting a playback it fails:
> 
> $ aplay clarinet.wav
> [  110.843619] fsl-sai 21d4000.sai: isr: Transmit underrun detected
> [  110.849841] fsl-sai 21d4000.sai: isr: Transmit underrun detected
> [  110.855995] fsl-sai 21d4000.sai: isr: Transmit underrun detected
> 
> (repeats forever).
> 
> Any ideas as to how to get SAI working on this platform?

You need a dts patch to configure SDMA channels via GPR. I don't have
it on hand. May send you after I get home.

> 
> Zidan,
> 
> How have you tested SAI when you usptream the driver?
> 
> Thanks