On Mon, Mar 19, 2012 at 03:03:40PM +0800, Lin Ming wrote: > > > > Sorry I didn't make it clear. > > The problem here is, we are going to set the device power state to D3 > > cold, and current OSPM has no support for it. > > > > Another patch of yours solved this problem by defining: > > 1 Device supports D3 cold if it has _PR3; > > 2 For a device to be put to D3 cold, power off all the power resources > > referenced in its _PR3. > > > > Since this can't work for AMD's platform(there is no _PR3 for the sata > > acpi device), I would like to change this a little bit: > > 1 Device supports D3 cold if it has _PR3 or _PS3; > > _PS3 may only mean D3Hot support for other device. > > You mentioned that AMD platform defined a special device, named ODDZ. > > How about device supports D3 cold if > > _PR3 or (is ODDZ and ODDZ._PS3)? Sounds good, I'll do this, thanks. > > > 2 For a device to be put to D3 cold, execute _PS3 first if available and > > then deal with _PR3 as above. > > __acpi_bus_set_power(...) has done this. > Actually not, current implementation of __acpi_bus_set_power will call _PS4 ;-) I'll need to think of a way to handle the D3 cold case. -Aaron -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
