* soc underrun problem
@ 2009-03-18 4:56 dfoley
2009-03-18 6:25 ` Takashi Iwai
0 siblings, 1 reply; 5+ messages in thread
From: dfoley @ 2009-03-18 4:56 UTC (permalink / raw)
To: alsa-devel
I'm currently having a problem with playing wave files
root@tsi-tpcxx:~# aplay /usr/share/sounds/alsa/Front_Center.wav
Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
mapped channel 10 to 2
underrun!!! (at least 130.662 ms long)
underrun!!! (at least 140.809 ms long)
I've narrowed it down to the commit ed3da3d9a0ef13c6fe1414ec73c9c1be12747b62 in linux-next/sound-2.6-tiwai.git.
ALSA: Rewrite hw_ptr updaters
The audio works fine, when I reverse this commit.
My hardware is: CPU s3c2410 @ 202.8Mhz codecs (ak4550 or tlv320)
Anyone else seeing this ?
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: soc underrun problem
2009-03-18 4:56 soc underrun problem dfoley
@ 2009-03-18 6:25 ` Takashi Iwai
2009-03-18 18:51 ` dfoley
0 siblings, 1 reply; 5+ messages in thread
From: Takashi Iwai @ 2009-03-18 6:25 UTC (permalink / raw)
To: dfoley; +Cc: alsa-devel
At Tue, 17 Mar 2009 21:56:06 -0700,
dfoley wrote:
>
> I'm currently having a problem with playing wave files
>
> root@tsi-tpcxx:~# aplay /usr/share/sounds/alsa/Front_Center.wav
> Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
> mapped channel 10 to 2
> underrun!!! (at least 130.662 ms long)
> underrun!!! (at least 140.809 ms long)
>
> I've narrowed it down to the commit ed3da3d9a0ef13c6fe1414ec73c9c1be12747b62 in linux-next/sound-2.6-tiwai.git.
> ALSA: Rewrite hw_ptr updaters
>
> The audio works fine, when I reverse this commit.
Could you build with CONFIG_SND_DEBUG_XRUN and set below?
echo 1 > /proc/asound/card0/pcm0p/xrun_debug
It will show you why the playback skips. It means usually the pointer
callback is unstable. The commit changed the xrun check more
strictly.
Takashi
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: soc underrun problem
2009-03-18 6:25 ` Takashi Iwai
@ 2009-03-18 18:51 ` dfoley
2009-03-19 7:40 ` Takashi Iwai
2009-03-19 7:40 ` Takashi Iwai
0 siblings, 2 replies; 5+ messages in thread
From: dfoley @ 2009-03-18 18:51 UTC (permalink / raw)
Cc: alsa-devel
Takashi Iwai wrote:
> At Tue, 17 Mar 2009 21:56:06 -0700,
> dfoley wrote:
>> I'm currently having a problem with playing wave files
>>
>> root@tsi-tpcxx:~# aplay /usr/share/sounds/alsa/Front_Center.wav
>> Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
>> mapped channel 10 to 2
>> underrun!!! (at least 130.662 ms long)
>> underrun!!! (at least 140.809 ms long)
>>
>> I've narrowed it down to the commit ed3da3d9a0ef13c6fe1414ec73c9c1be12747b62 in linux-next/sound-2.6-tiwai.git.
>> ALSA: Rewrite hw_ptr updaters
>>
>> The audio works fine, when I reverse this commit.
>
> Could you build with CONFIG_SND_DEBUG_XRUN and set below?
> echo 1 > /proc/asound/card0/pcm0p/xrun_debug
>
> It will show you why the playback skips. It means usually the pointer
> callback is unstable. The commit changed the xrun check more
> strictly.
>
>
> Takashi
root@tsi-tpcxx:~# echo 1 > /proc/asound/card0/pcm0p/xrun_debug
root@tsi-tpcxx:~# aplay /usr/share/sounds/alsa/Front_Center.wav
Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
mapped channel 10 to 2
hda_codec: Lost interrupts? (stream=0, delta=20004, intr_ptr=2048)
XRUN: pcmC0D0p
underrun!!! (at least 58.490 ms long)
hda_codec: Lost interrupts? (stream=0, delta=20003, intr_ptr=2048)
XRUN: pcmC0D0p
underrun!!! (at least 58.254 ms long)
hda_codec: Lost interrupts? (stream=0, delta=20004, intr_ptr=2048)
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: soc underrun problem
2009-03-18 18:51 ` dfoley
@ 2009-03-19 7:40 ` Takashi Iwai
2009-03-19 7:40 ` Takashi Iwai
1 sibling, 0 replies; 5+ messages in thread
From: Takashi Iwai @ 2009-03-19 7:40 UTC (permalink / raw)
To: dfoley; +Cc: alsa-devel
At Wed, 18 Mar 2009 11:51:08 -0700,
dfoley wrote:
>
> Takashi Iwai wrote:
> > At Tue, 17 Mar 2009 21:56:06 -0700,
> > dfoley wrote:
> >> I'm currently having a problem with playing wave files
> >>
> >> root@tsi-tpcxx:~# aplay /usr/share/sounds/alsa/Front_Center.wav
> >> Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
> >> mapped channel 10 to 2
> >> underrun!!! (at least 130.662 ms long)
> >> underrun!!! (at least 140.809 ms long)
> >>
> >> I've narrowed it down to the commit ed3da3d9a0ef13c6fe1414ec73c9c1be12747b62 in linux-next/sound-2.6-tiwai.git.
> >> ALSA: Rewrite hw_ptr updaters
> >>
> >> The audio works fine, when I reverse this commit.
> >
> > Could you build with CONFIG_SND_DEBUG_XRUN and set below?
> > echo 1 > /proc/asound/card0/pcm0p/xrun_debug
> >
> > It will show you why the playback skips. It means usually the pointer
> > callback is unstable. The commit changed the xrun check more
> > strictly.
> >
> >
> > Takashi
>
> root@tsi-tpcxx:~# echo 1 > /proc/asound/card0/pcm0p/xrun_debug
> root@tsi-tpcxx:~# aplay /usr/share/sounds/alsa/Front_Center.wav
> Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
> mapped channel 10 to 2
> hda_codec: Lost interrupts? (stream=0, delta=20004, intr_ptr=2048)
> XRUN: pcmC0D0p
> underrun!!! (at least 58.490 ms long)
> hda_codec: Lost interrupts? (stream=0, delta=20003, intr_ptr=2048)
> XRUN: pcmC0D0p
> underrun!!! (at least 58.254 ms long)
> hda_codec: Lost interrupts? (stream=0, delta=20004, intr_ptr=2048)
So, actually either the interrupt timing or the pointer callback is
wrong on your driver.
Try to add a debug print in your pointer callback to print the
returned value at each call (better together with runtime->period_size
and runtime->buffer_size to refer).
Takashi
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: soc underrun problem
2009-03-18 18:51 ` dfoley
2009-03-19 7:40 ` Takashi Iwai
@ 2009-03-19 7:40 ` Takashi Iwai
1 sibling, 0 replies; 5+ messages in thread
From: Takashi Iwai @ 2009-03-19 7:40 UTC (permalink / raw)
To: dfoley; +Cc: alsa-devel
At Wed, 18 Mar 2009 11:51:08 -0700,
dfoley wrote:
>
> Takashi Iwai wrote:
> > At Tue, 17 Mar 2009 21:56:06 -0700,
> > dfoley wrote:
> >> I'm currently having a problem with playing wave files
> >>
> >> root@tsi-tpcxx:~# aplay /usr/share/sounds/alsa/Front_Center.wav
> >> Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
> >> mapped channel 10 to 2
> >> underrun!!! (at least 130.662 ms long)
> >> underrun!!! (at least 140.809 ms long)
> >>
> >> I've narrowed it down to the commit ed3da3d9a0ef13c6fe1414ec73c9c1be12747b62 in linux-next/sound-2.6-tiwai.git.
> >> ALSA: Rewrite hw_ptr updaters
> >>
> >> The audio works fine, when I reverse this commit.
> >
> > Could you build with CONFIG_SND_DEBUG_XRUN and set below?
> > echo 1 > /proc/asound/card0/pcm0p/xrun_debug
> >
> > It will show you why the playback skips. It means usually the pointer
> > callback is unstable. The commit changed the xrun check more
> > strictly.
> >
> >
> > Takashi
>
> root@tsi-tpcxx:~# echo 1 > /proc/asound/card0/pcm0p/xrun_debug
> root@tsi-tpcxx:~# aplay /usr/share/sounds/alsa/Front_Center.wav
> Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
> mapped channel 10 to 2
> hda_codec: Lost interrupts? (stream=0, delta=20004, intr_ptr=2048)
> XRUN: pcmC0D0p
> underrun!!! (at least 58.490 ms long)
> hda_codec: Lost interrupts? (stream=0, delta=20003, intr_ptr=2048)
> XRUN: pcmC0D0p
> underrun!!! (at least 58.254 ms long)
> hda_codec: Lost interrupts? (stream=0, delta=20004, intr_ptr=2048)
So, actually either the interrupt timing or the pointer callback is
wrong on your driver.
Try to add a debug print in your pointer callback to print the
returned value at each call (better together with runtime->period_size
and runtime->buffer_size to refer).
Takashi
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2009-03-19 7:40 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2009-03-18 4:56 soc underrun problem dfoley
2009-03-18 6:25 ` Takashi Iwai
2009-03-18 18:51 ` dfoley
2009-03-19 7:40 ` Takashi Iwai
2009-03-19 7:40 ` Takashi Iwai
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