* omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! @ 2020-07-11 3:33 Dave Young 2020-07-14 18:03 ` Jarkko Nikula 0 siblings, 1 reply; 5+ messages in thread From: Dave Young @ 2020-07-11 3:33 UTC (permalink / raw) To: Peter Ujfalusi, Jarkko Nikula, alsa-devel, linux-omap Hi, I'm trying to use g_audio on my Nokia N900 with mainline kernel. Seems it does not work. No sound when I play from a laptop, and also see a lot of error like below: [ 4729.557647] omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! ... Is this a know issue? Thanks Dave ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! 2020-07-11 3:33 omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! Dave Young @ 2020-07-14 18:03 ` Jarkko Nikula 2020-07-20 9:03 ` Peter Ujfalusi 0 siblings, 1 reply; 5+ messages in thread From: Jarkko Nikula @ 2020-07-14 18:03 UTC (permalink / raw) To: Dave Young, Peter Ujfalusi, alsa-devel, linux-omap [-- Attachment #1: Type: text/plain, Size: 1042 bytes --] Hi On 7/11/20 6:33 AM, Dave Young wrote: > Hi, > > I'm trying to use g_audio on my Nokia N900 with mainline kernel. Seems > it does not work. No sound when I play from a laptop, and also see a > lot of error like below: > [ 4729.557647] omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! > ... > Head 0dc589da873b ("Merge tag 'iommu-fixes-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu") records and plays fine here (arecord -f dat |aplay), although I see some of those errors but don't hear any glitches etc. Peter, does above indicate a serious issue or is it perhaps a false alarm on OMAP3 (no audible glitches)? I believe you don't have some mixer knob on, N900 audio path is somewhat complex and needs bunch of mixer switches and volumes to be set. I attached my N900 mixer scripts for you to try. Set first everything off: ./aic34_scripts/shutdown.sh Then enable internal digital microphone and speakers: ./aic34_scripts/dmic.sh ./aic34_scripts/speakers.sh Hopefully these help you get going :-) -- Jarkko [-- Attachment #2: aic34_scripts.tar.bz2 --] [-- Type: application/octet-stream, Size: 1729 bytes --] ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! 2020-07-14 18:03 ` Jarkko Nikula @ 2020-07-20 9:03 ` Peter Ujfalusi 2020-07-20 9:32 ` Peter Ujfalusi 0 siblings, 1 reply; 5+ messages in thread From: Peter Ujfalusi @ 2020-07-20 9:03 UTC (permalink / raw) To: Jarkko Nikula, Dave Young, alsa-devel, linux-omap Hi, On 14/07/2020 21.03, Jarkko Nikula wrote: > Hi > > On 7/11/20 6:33 AM, Dave Young wrote: >> Hi, >> >> I'm trying to use g_audio on my Nokia N900 with mainline kernel. Seems >> it does not work. No sound when I play from a laptop, and also see a >> lot of error like below: >> [ 4729.557647] omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! >> ... >> > Head 0dc589da873b ("Merge tag 'iommu-fixes-v5.8-rc5' of > git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu") records and > plays fine here (arecord -f dat |aplay), although I see some of those > errors but don't hear any glitches etc. > > Peter, does above indicate a serious issue or is it perhaps a false > alarm on OMAP3 (no audible glitches)? I need to dig out my n900 or beagleXM, but it is hard to believe it is not a result of a glitch. The DMA is triggered by McBSP and it should write exactly what McBSP expects to be receiving. I can not recall any changes in the past years which would have introduced regressions in McBSP or the sDMA driver. > I believe you don't have some mixer knob on, N900 audio path is somewhat > complex and needs bunch of mixer switches and volumes to be set. I > attached my N900 mixer scripts for you to try. This could be the reason for the silence, I have asoundrc files somewhere to restore a 'good' mixer config. > Set first everything off: > ./aic34_scripts/shutdown.sh > > Then enable internal digital microphone and speakers: > ./aic34_scripts/dmic.sh > ./aic34_scripts/speakers.sh > > Hopefully these help you get going :-) > - Péter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! 2020-07-20 9:03 ` Peter Ujfalusi @ 2020-07-20 9:32 ` Peter Ujfalusi 2020-07-21 3:18 ` Dave Young 0 siblings, 1 reply; 5+ messages in thread From: Peter Ujfalusi @ 2020-07-20 9:32 UTC (permalink / raw) To: Jarkko Nikula, Dave Young, alsa-devel, linux-omap Hi, On 20/07/2020 12.03, Peter Ujfalusi wrote: > Hi, > > On 14/07/2020 21.03, Jarkko Nikula wrote: >> Hi >> >> On 7/11/20 6:33 AM, Dave Young wrote: >>> Hi, >>> >>> I'm trying to use g_audio on my Nokia N900 with mainline kernel. Seems >>> it does not work. No sound when I play from a laptop, and also see a >>> lot of error like below: >>> [ 4729.557647] omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! >>> ... >>> >> Head 0dc589da873b ("Merge tag 'iommu-fixes-v5.8-rc5' of >> git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu") records and >> plays fine here (arecord -f dat |aplay), although I see some of those >> errors but don't hear any glitches etc. >> >> Peter, does above indicate a serious issue or is it perhaps a false >> alarm on OMAP3 (no audible glitches)? > > I need to dig out my n900 or beagleXM, but it is hard to believe it is > not a result of a glitch. > The DMA is triggered by McBSP and it should write exactly what McBSP > expects to be receiving. > > I can not recall any changes in the past years which would have > introduced regressions in McBSP or the sDMA driver. I have booted linux-next on my BeagleXM (OMAP3630, McBSP2 <-> twl4030) and I don't see the TX overflow print. I have checked element and threshold modes and it looks fine. I'm not sure why we have TX Overflow printed on n900. >> I believe you don't have some mixer knob on, N900 audio path is somewhat >> complex and needs bunch of mixer switches and volumes to be set. I >> attached my N900 mixer scripts for you to try. > > This could be the reason for the silence, I have asoundrc files > somewhere to restore a 'good' mixer config. > >> Set first everything off: >> ./aic34_scripts/shutdown.sh >> >> Then enable internal digital microphone and speakers: >> ./aic34_scripts/dmic.sh >> ./aic34_scripts/speakers.sh >> >> Hopefully these help you get going :-) >> > > - Péter > > Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. > Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki > - Péter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! 2020-07-20 9:32 ` Peter Ujfalusi @ 2020-07-21 3:18 ` Dave Young 0 siblings, 0 replies; 5+ messages in thread From: Dave Young @ 2020-07-21 3:18 UTC (permalink / raw) To: Peter Ujfalusi; +Cc: Jarkko Nikula, alsa-devel, linux-omap Hi Peter On 07/20/20 at 12:32pm, Peter Ujfalusi wrote: > Hi, > > On 20/07/2020 12.03, Peter Ujfalusi wrote: > > Hi, > > > > On 14/07/2020 21.03, Jarkko Nikula wrote: > >> Hi > >> > >> On 7/11/20 6:33 AM, Dave Young wrote: > >>> Hi, > >>> > >>> I'm trying to use g_audio on my Nokia N900 with mainline kernel. Seems > >>> it does not work. No sound when I play from a laptop, and also see a > >>> lot of error like below: > >>> [ 4729.557647] omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! > >>> ... > >>> > >> Head 0dc589da873b ("Merge tag 'iommu-fixes-v5.8-rc5' of > >> git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu") records and > >> plays fine here (arecord -f dat |aplay), although I see some of those > >> errors but don't hear any glitches etc. > >> > >> Peter, does above indicate a serious issue or is it perhaps a false > >> alarm on OMAP3 (no audible glitches)? > > > > I need to dig out my n900 or beagleXM, but it is hard to believe it is > > not a result of a glitch. > > The DMA is triggered by McBSP and it should write exactly what McBSP > > expects to be receiving. > > > > I can not recall any changes in the past years which would have > > introduced regressions in McBSP or the sDMA driver. > > I have booted linux-next on my BeagleXM (OMAP3630, McBSP2 <-> twl4030) > and I don't see the TX overflow print. Just to clarify, the sound works well on n900 for normal use cases. The TX overflow only happens when I use it as an usb audio gadget. Because n900 is old, I tried to use it as an external audio device. > > I have checked element and threshold modes and it looks fine. > I'm not sure why we have TX Overflow printed on n900. > > >> I believe you don't have some mixer knob on, N900 audio path is somewhat > >> complex and needs bunch of mixer switches and volumes to be set. I > >> attached my N900 mixer scripts for you to try. > > > > This could be the reason for the silence, I have asoundrc files > > somewhere to restore a 'good' mixer config. > > > >> Set first everything off: > >> ./aic34_scripts/shutdown.sh > >> > >> Then enable internal digital microphone and speakers: > >> ./aic34_scripts/dmic.sh > >> ./aic34_scripts/speakers.sh > >> > >> Hopefully these help you get going :-) > >> > > > > - Péter > > > > Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. > > Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki > > > > - Péter > > Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. > Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki > Thanks Dave ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-07-21 3:18 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-07-11 3:33 omap-mcbsp 49022000.mcbsp: TX Buffer Overflow! Dave Young 2020-07-14 18:03 ` Jarkko Nikula 2020-07-20 9:03 ` Peter Ujfalusi 2020-07-20 9:32 ` Peter Ujfalusi 2020-07-21 3:18 ` Dave Young
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