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

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Date:	Wed, 10 Mar 2010 00:05:52 -0800
From:	VDR User <user.vdr@...il.com>
To:	Jaroslav Kysela <perex@...ex.cz>
Cc:	Wu Fengguang <fengguang.wu@...el.com>, Wei Ni <wni@...dia.com>,
	Takashi Iwai <tiwai@...e.de>,
	alsa-devel <alsa-devel@...a-project.org>,
	Jaroslav Kysela <jkysela@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	akpm <akpm@...ux-foundation.org>,
	Pavel Hofman <pavel.hofman@...ite.cz>
Subject: Re: [alsa-devel] [PATCH]Support MCP89 and GT21x hdmi audio

On Tue, Mar 9, 2010 at 11:58 PM, Jaroslav Kysela <perex@...ex.cz> wrote:
> On Tue, 9 Mar 2010, VDR User wrote:
>
>> On Sun, Mar 7, 2010 at 8:46 PM, Wu Fengguang <fengguang.wu@...el.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@...il.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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