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    SubjectRe: [alsa-devel] [PATCH]Support MCP89 and GT21x hdmi audio
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    On Tue, Mar 9, 2010 at 11:58 PM, Jaroslav Kysela <perex@perex.cz> wrote:
    > On Tue, 9 Mar 2010, VDR User wrote:
    >
    >> On Sun, Mar 7, 2010 at 8:46 PM, Wu Fengguang <fengguang.wu@intel.com>
    >> wrote:
    >>>
    >>> CC Jaroslav, maybe he has some idea on
    >>>
    >>>        pcm_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@gmail.com]
    >>>> 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.  I 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      2010-03-06
    >>>> 18:02:00.000000000 -0800
    >>>> @@ -1335,6 +1335,8 @@ static struct hda_codec_preset snd_hda_p
    >>>>           .patch = patch_nvhdmi_8ch_89 },
    >>>>         { .id = 0x10de000b, .name = "GT21x HDMI",
    >>>>           .patch = patch_nvhdmi_8ch_89 },
    >>>> +       { .id = 0x10de000a, .name = "GT220 HDMI",
    >>>> +         .patch = patch_nvhdmi_8ch_89 },
    >>>>         { .id = 0x10de000d, .name = "GT240 HDMI",
    >>>>           .patch = patch_nvhdmi_8ch_89 },
    >>>>         {} /* terminator */
    >>>> @@ -1347,6 +1349,7 @@ MODULE_ALIAS("snd-hda-codec-id:10de0006"
    >>>>  MODULE_ALIAS("snd-hda-codec-id:10de0007");
    >>>>  MODULE_ALIAS("snd-hda-codec-id:10de0067");
    >>>>  MODULE_ALIAS("snd-hda-codec-id:10de8001");
    >>>> +MODULE_ALIAS("snd-hda-codec-id:10de000a");
    >>>>  MODULE_ALIAS("snd-hda-codec-id:10de000c");
    >>>>  MODULE_ALIAS("snd-hda-codec-id:10de000b");
    >>>>  MODULE_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.  However, my setup was an 8400gs
    >>>> using SPDIF OUT from my mainboard to SPDIF IN on the card.  Then 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.

    I don't know how but I'm willing to try if you want to tell me how to
    do it. Please keep in mind, I'm just an end-user -- not a developer
    or even c coder. The most I've done is run xine in gdb to help supply
    bug info to those devs.
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