On Fri, Apr 09, 2010 at 06:50:26AM -0400, Andy Walls wrote: > On Fri, 2010-04-09 at 08:21 +0100, James Hogan wrote: > > Hi, > > > > On Thursday 25 March 2010 14:42:33 Mauro Carvalho Chehab wrote: > > > Comments? > > > > I haven't seen this mentioned yet, but are there any plans for a sysfs > > interface to set up waking from suspend/standby on a particular IR scancode > > (for hardware decoders that support masking of comparing of the IR data), kind > > of analagous to the rtc framework's wakealarm sysfs file? > > This requires support at the hardware level. (You can't have CPU code > running to decode IR pulses when your CPU is "asleep".) > > I know of two video chips supported under linux that provide such a > function. > > Wake-up from IR for these chips will rely on the kernel PCIe or USB > infrastructure supporting PCIe or USB Power Managment Events from > hardware. It will take a huge amount of work and time to get the > respective linux video drivers to properly support suspend/resume > properly. > > If you're waiting for me to get that working, I'll advise you to plan on > getting off the couch and pushing the power switch for some time to > come. ;) > > > > > The MCE-USB, I *speculate*, can perform wakes. It's driver would need > to support that, if it can. Yep, it can perform wakes, and the current lirc_mceusb does support it, though it requires some screwing around with echoing something into somewhere in sysfs (for the usb controller its attached to) to enable it, from what I recall... Making it Just Work would be a good idea. -- Jarod Wilson jarod@xxxxxxxxxx -- 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
