On 05/29/2013 01:10 AM, Jan Glauber wrote: > Hi list, > > what's the status of suspend-to-disk on ARM? The most recent discussion I > found is: > http://lists.linuxfoundation.org/pipermail/linux-pm/2012-November/034997.html > > with no replies at all. Is anyone still working on that? Anyone got it running? > > I tried the patch above (on top of LTS 3.4) and got stuck forever, the last > thing on the console was: > > root@omap5:/sys/power# echo disk > state > [ 2015.641540] PM: Syncing filesystems ... done. > [ 2015.666870] PM: Preallocating image memory... done (allocated 16957 pages) > [ 2016.062011] PM: Allocated 67828 kbytes in 0.38 seconds (178.49 MB/s) > > Any hint how to debug that? > > thanks, > Jan > Because of the nature of omap5 PM, you'd need omap5 specific support in order for this to work. Specifically, there are a number of assumptions about certain power domains never losing state. You can take a look at the work I did to get this working on am335x here: https://github.com/russdill/linux/commits/arm-hibernation-am33xx For ARM hibernation support to get merged, there needs to be at least one platform that supports it. the am335x code I have is not ready as it still relies on PM patchsets that have not yet themselves been merged.
