[alsa-devel] [PATCH 0/4] ALSA: Updates for the CA0132 codec

[Takashi Iwai]

Hi Ian,

At Fri, 8 Feb 2013 18:31:41 -0800,
Ian Minett wrote:
> 
> From: Ian Minett <ian_minett at creativelabs.com>
> 
> Hi,
> 
> This series contains the following updates to CA0132:
> 
> 1: Add firmware loading for the SpeakerEQ DSP effect.
> 2: Improve DSP transfer timeout calculations.
> 3: Add stream and effect latency monitoring routines 
> 4: Update hp unsolicited event handler to manage queued work.

Thanks, I took the one now but leave others.  See my reply to each.

> 
> These were based on the latest sound.git, but please let me know if 
> they should be against sound-unstable tree instead.

sound.git tree for-next branch would be the place to look at.
If I start a new branch for ca0132, I'll let you know.


But, before going further: as I already mailed you, I could get a test
board and started testing.  The result wasn't good.  At the first time
the driver loads, the DSP loading fails always.  When the driver is
reloaded after that, it's working.  So, something is still pretty
fragile.

I checked the code, and fixed a few overlooked things.  Now I wonder
why dma_reset() must be called at each DSP chunk load.  It reallocates
the whole buffer, and I see no reason.  It seems working even if I
comment it out.  Could you clarify?

Another thing I noticed is that I got a short burst noise at the very
first playback.  After that, the driver starts working well.
Is it some uninitialized buffer or so?


thanks,

Takashi