Re: [alsa-devel] [PATCH] hda-emu: Add support for channel mapping API

On 09/17/2012 12:18 PM, Takashi Iwai wrote:

At Mon, 17 Sep 2012 11:56:37 +0200, David Henningsson wrote:

...

Hi Takashi,

I tried to make hda-emu compile with the latest changes to the HDA driver. This is the result. It compiles, but when running any codec, I get the error "Control element Playback Channel Map:0 already exists!". I'm unsure whether this is a problem in the driver or in my simple copy-paste attempt to make this work. Can you offer some insight?

It's an issue in hda-emu. For simplicity, hda-emu didn't touch the ALSA PCM instance at all, so pcm->number is always zero.

An additional patch below should fix the problem.

Thanks, attaching modified patch.