[alsa-devel] Issues with ALSA:ice1724 sound cards on powerpc machines

[Takashi Iwai]

On Mon, 04 Apr 2016 21:58:14 +0200,
Julian Margetson wrote:
> 
> On 2/17/2016 2:29 PM, Julian Margetson wrote:
> > Hi
> >
> > Having an issue issue with ice1724 sound cards on powerpc motherboards.
> > Motherboards in question Acube Sam460ex .
> > The card appears as a valid device but there is no sound output on the 
> > majority of boots of the computer.
> > Logs attached.
> > On the first set boot audio playback produced sound ok.
> > On the second set boot no sound was produce with audio playback
> >
> >
> > Regards
> > Julian Margetson
> >
> >
> >
> Anyone have any ideas ?
> 
> Resubmitting again with links to logs instead of included as attachments.
> The issue also seen on A-Eon Cyrus P5020 motherboard .
> 
> https://www.dropbox.com/s/72labcje9z1r1b7/1alsa-info.txt.7CLHMG0Gap?dl=0
> https://www.dropbox.com/s/v1pn5kjqrvwu16f/boot_1.log?dl=0
> https://www.dropbox.com/s/uuaa14rkpmmz1o0/2alsa-info.txt.VKiEVuytiJ?dl=0
> https://www.dropbox.com/s/wwu2f5t93l8g26d/boot_2.log?dl=0

I have no concrete idea, but in general, the usual problems on PPC are
either related with cache coherency or byte endianness.  I don't know
of any issue with the latter in ice1724 driver, so likely it's the
former.

Do you get DMA transfer error, or is just the silent output?  In the
former case, the problem is usually in ice1724.c, as it's the DMA
controller part.  The latter is, OTOH, likely a codec issue, and it's
either in each sound/pci/ice1712/*.c (the corresponding one) or in i2c
driver sound/i2c/*.

But unfortunately it's not easy to track such an issue remotely, and
hard to guess without the hardware response.


Takashi