Em 26-09-2011 05:13, Thomas Petazzoni escreveu: > Hello Mauro, > > Le Fri, 23 Sep 2011 23:15:54 -0300, > Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> a écrit : > >>> And still the result is the same: we get a first frame, and then >>> nothing more, and we have a large number of error messages in the >>> kernel logs. >> >> I don't think that this is related to the power manager anymore. It can >> be related to cache coherency and/or to iommu support. > > As you suspected, increasing PWR_SLEEP_INTERVAL didn't change anything. > What do you suggest to track down the potential cache coherency issues ? Take a look at the ML. The SoC people discussed a lot about cache coherency problems and how to solve it. Videobuf2 has a better support on embedded world. I would take a look on it and see what it does different than other drivers. Maybe Jonathan Corbet patches for the ccic driver may help you. It is probably a good idea to change cx231xx to use videobuf2, in order to fix this issue. Thanks, Mauro > > Best regards, > > Thomas -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
