Re: [alsa-devel] [PATCH]Support MCP89 and GT21x hdmi audio

[Jaroslav Kysela]

On Tue, 9 Mar 2010, VDR User wrote:

> On Sun, Mar 7, 2010 at 8:46 PM, Wu Fengguang <fengguang.wu@xxxxxxxxx> wrote:
> > CC Jaroslav, maybe he has some idea on
> >
> > Â Â Â Âpcm_hw.c: snd_pcm_hw_delay() SNDRV_PCM_IOCTL_DELAY failed.
> >
> > On Mon, Mar 08, 2010 at 12:35:37PM +0800, Wei Ni wrote:
> > > Hi,
> > > Because I don't have GT220 card on hand, I didn't test it yet.
> > > So I didn't add this card to the patch file. I think you could add it after
> > > you test it.
> > >
> > > About the warning messages, I don't know why.
> > > May be some others can answer.
> > >
> > > Thanks
> > > Wei.
> > > nvpublic
> > >
> > > -----Original Message-----
> > > From: VDR User [mailto:user.vdr@xxxxxxxxx]
> > > Sent: Monday, March 08, 2010 3:22 AM
> > > To: Wei Ni
> > > Cc: Takashi Iwai; akpm; alsa-devel; Wu Fengguang; linux-kernel; Pavel Hofman
> > > Subject: Re: [alsa-devel] [PATCH]Support MCP89 and GT21x hdmi audio
> > >
> > > I think this may be relevant to this subject, if not then my apologies.
> > >
> > > I've just installed a GT220 card and was able to get audio-over-hdmi
> > > working by compiling the snapshot drivers from 20100307 which contain
> > > Wei's new code. ÂI further had to patch the driver to recognize my
> > > card with:
> > >
> > > --- alsa-driver-orig/alsa-kernel/pci/hda/patch_nvhdmi.c 2010-03-06
> > > 18:00:12.000000000 -0800
> > > +++ alsa-driver/alsa-kernel/pci/hda/patch_nvhdmi.c   Â2010-03-06
> > > 18:02:00.000000000 -0800
> > > @@ -1335,6 +1335,8 @@ static struct hda_codec_preset snd_hda_p
> > > Â Â Â Â Â .patch = patch_nvhdmi_8ch_89 },
> > > Â Â Â Â { .id = 0x10de000b, .name = "GT21x HDMI",
> > > Â Â Â Â Â .patch = patch_nvhdmi_8ch_89 },
> > > + Â Â Â { .id = 0x10de000a, .name = "GT220 HDMI",
> > > + Â Â Â Â .patch = patch_nvhdmi_8ch_89 },
> > > Â Â Â Â { .id = 0x10de000d, .name = "GT240 HDMI",
> > > Â Â Â Â Â .patch = patch_nvhdmi_8ch_89 },
> > > Â Â Â Â {} /* terminator */
> > > @@ -1347,6 +1349,7 @@ MODULE_ALIAS("snd-hda-codec-id:10de0006"
> > > ÂMODULE_ALIAS("snd-hda-codec-id:10de0007");
> > > ÂMODULE_ALIAS("snd-hda-codec-id:10de0067");
> > > ÂMODULE_ALIAS("snd-hda-codec-id:10de8001");
> > > +MODULE_ALIAS("snd-hda-codec-id:10de000a");
> > > ÂMODULE_ALIAS("snd-hda-codec-id:10de000c");
> > > ÂMODULE_ALIAS("snd-hda-codec-id:10de000b");
> > > ÂMODULE_ALIAS("snd-hda-codec-id:10de000d");
> > >
> > > This seems to work fine when running VDR but if I do anything else
> > > like upgrade packages, compile something, or maybe create a bz2, then
> > > I start to see _a lot_ of the following in my xine log:
> > >
> > > pcm_hw.c: snd_pcm_hw_delay() SNDRV_PCM_IOCTL_DELAY failed.
> > >
> > > With the old code this didn't happen. ÂHowever, my setup was an 8400gs
> > > using SPDIF OUT from my mainboard to SPDIF IN on the card. ÂThen using
> > > a dvi->hdmi cable into the tv.
> > >
> > > Again, I apologize if I'm posting this in the wrong place.
> > >
> > > Best regards.
>
> So nobody has any ideas at all?  This is turning out to be a big
> problem and I've discovered it will occur even without anything else
> happening on the system.  (originally I thought you needed to do some
> other activity.)  I've checked with some other devs I know and
> everyone has said the problem is with alsa so it would seem there is a
> serious bug somewhere since eventually those errors will happen and
> the audio will start skipping like crazy.
>
> Please let me know if there's anything I can do within my ability to help.

Could you do strace for ALSA ioctls? At least having the error code might 
help to identify this issue.

					Jaroslav

-----
Jaroslav Kysela <perex@xxxxxxxx>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.