On 23.06.2015 01:00, Anand Moon wrote: > Hi Krzysztof > > On 13 June 2015 at 13:45, Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx > <mailto:k.kozlowski@xxxxxxxxxxx>> wrote: > > 2015-06-13 14:47 GMT+09:00 Krzysztof Kozlowski > <k.kozlowski@xxxxxxxxxxx <mailto:k.kozlowski@xxxxxxxxxxx>>: > > W dniu 13.06.2015 o 06:48, gabriel@xxxxxxxxx > <mailto:gabriel@xxxxxxxxx> pisze: > >> On 06/10/2015 10:22 AM, Krzysztof Kozlowski wrote: > >>> > >>> Gabriel, > >>> > >>> I sent a patch which should fix the issue. Could you give it a > try? Of > >>> course don't revert the other patches and don't use other > workarounds. > >>> Just apply the patch on clean (vanilla would be the best) kernel. > >>> [RFT PATCH] dmaengine: Fix choppy sound because of unimplemented > resume > >>> > >> > >> hi krzysztof, > >> > >> thanks a lot for your work. having only that patch applied > unfortunately > >> brought back the problem after something more than one day. the sound > >> became choppy/noisy again. I will now compile the -next kernel > and give > >> it a try. > > > > Thanks, I'll try to reproduce the issue on my Odroid. Can you > share more > > details how to reproduce it? The audio must play continuously or just > > from time to time but the board must be turned on for more than > one day? > > I bought some audio cables and successfully reproduced similar issue > (choppy sound) on Odroid XU3-Lite. On current linux-next > (next-20150612) the sound is awful (choppy) after few seconds of play. > For example first four of: > $ aplay /usr/share/sounds/alsa/Front_Right.wav > work fine. But then it just gets worse and underruns are reported: > $ Playing WAVE '/usr/share/sounds/alsa/Front_Right.wav' : Signed 16 > bit Little Endian, Rate 48000 Hz, Mono > $ underrun!!! (at least 0.095 ms long) > > Reverting the commit aee4d1fac887 ("dmaengine: pl330: improve > pl330_tx_status() function") fixes this issue so this is not related > to missing "resume" function. At least this particular issue on my > Odroid is not related to missing resume but I did not try to play > sound for 24 hours. > My fix does not solve this. Probably "cc-stable" and "fixes" tags > should be dropped. > > Anyway I'll try to investigate it more. If anyone has any ideas, > please share. > > Best regards, > Krzysztof > -- > To unsubscribe from this list: send the line "unsubscribe > linux-samsung-soc" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > <mailto:majordomo@xxxxxxxxxxxxxxx> > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > I gave it a try by enabling following config flags. > > CONFIG_SND_SEQUENCER=m > CONFIG_SND_SEQ_DUMMY=m > CONFIG_SND_USB_AUDIO=m > > I am able to play mp3 songs on Odroid-XU3 boards on vlc. > Could you give it a try. What do you mean? Which patch are you talking about? Are you aware that I tried to fix this two times? I already tested the latest fix on Odroid XU3 - which I mentioned in commit. However it would be nice to get confirmation for fixing original bug report (that specific conditions on that board which Gabriel reported). Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in
