android_kernel_motorola_sm6225/Documentation/power
Rafael J. Wysocki 3a2d5b7001 PM: Introduce PM_EVENT_HIBERNATE callback state
During the last step of hibernation in the "platform" mode (with the
help of ACPI) we use the suspend code, including the devices'
->suspend() methods, to prepare the system for entering the ACPI S4
system sleep state.

But at least for some devices the operations performed by the
->suspend() callback in that case must be different from its operations
during regular suspend.

For this reason, introduce the new PM event type PM_EVENT_HIBERNATE and
pass it to the device drivers' ->suspend() methods during the last phase
of hibernation, so that they can distinguish this case and handle it as
appropriate.  Modify the drivers that handle PM_EVENT_SUSPEND in a
special way and need to handle PM_EVENT_HIBERNATE in the same way.

These changes are necessary to fix a hibernation regression related
to the i915 driver (ref. http://lkml.org/lkml/2008/2/22/488).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Tested-by: Jeff Chua <jeff.chua.linux@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-23 10:40:04 -08:00
..
00-INDEX Add Documentation/power/00-INDEX 2007-10-17 08:43:06 -07:00
basic-pm-debugging.txt PM: Suspend/hibernation debug documentation update (rev. 2) 2008-02-01 18:30:54 -05:00
devices.txt PM: Introduce PM_EVENT_HIBERNATE callback state 2008-02-23 10:40:04 -08:00
drivers-testing.txt PM: Suspend/hibernation debug documentation update (rev. 2) 2008-02-01 18:30:54 -05:00
freezing-of-tasks.txt freezer: do not send signals to kernel threads 2007-10-18 14:37:19 -07:00
interface.txt PM: Rename struct pm_ops and related things 2007-10-18 14:37:18 -07:00
notifiers.txt Hibernation: Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers (rev. 2) 2008-02-01 18:30:53 -05:00
pci.txt PCI: remove useless pci driver method 2007-07-11 16:02:08 -07:00
s2ram.txt [PATCH] s2ram debugging documentation 2006-12-07 08:39:28 -08:00
states.txt power management: remove firmware disk mode 2007-04-30 16:40:40 -07:00
swsusp-and-swap-files.txt typo fixes 2007-10-20 01:34:40 +02:00
swsusp-dmcrypt.txt [PATCH] swsusup with dm-crypt mini howto 2005-09-05 00:06:17 -07:00
swsusp.txt PM: documentation cleanups 2008-02-07 01:27:17 -05:00
tricks.txt Fix typos in Documentation/: 'S' 2006-10-03 22:55:17 +02:00
userland-swsusp.txt Hibernation: Introduce exportable suspend ioctls header (rev. 2) 2008-02-01 18:30:53 -05:00
video.txt Fix typos in Documentation/: 'N'-'P' 2006-10-03 22:52:05 +02:00
video_extension.txt [PATCH] acpi: fix video docs 2005-06-25 16:24:32 -07:00