On Sun, 27 Jul 2008, Robert Jarzmik wrote: > Yes, I have tested, with a complete suspend/resume cycle on a Mitac Mio A701 > smartphone. And yes, the PXA suspend is based on SDRAM being in self refresh > state. I'm speaking of suspend, not standby, there's no confusion here. > > Notice I always go into suspend while _not_ in active capturing. That could > change things. Yes, this is the difference. The sensor is attached to the camera host only on open. In fact, I am not sure, how video applications should behave during a suspend / resume cycle. If you suspend, while, say, recording from your camera, should you directly continue recording after a wake up? How do currect drivers implement this? Or, in general, for example with audio - if you suspend while listening to a stream over the net, or to a CD, or to a mp3-file on your local disk, should the sound resume after a wake up? I added linux-pm for some authoritative answers:-) If you know how a v4l2 device should handle suspend/resume, or when we get some answers, let's try to do it completely- > Have you previously tested the pxa_camera driver in suspend ? No, I have not. I didn't have power-management enabled on my board, and I don't know how easy such tests would be on my hardware. That's why I just removed all suspend/resume code from the pxa270 driver completely. > For history, my setup is : > - a pxa272 on a Mio A701 board > - a Micron MT9M111 chip (driver under construction) > > For the camera part, by now, I'm using standard suspend/resume functions of the > platform driver (mt9m111.c). It does work, but it's not clean ATM. The chaining > between the driver resume function and the availability of the I2C bus are not > properly chained. I'm still working on it. Yes, we have to clarify this too. Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
