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Imre Deak 300efa9eea drm/i915: Fix hibernation with ACPI S0 target state After commit `dd9f31c7a3` Author: Imre Deak <imre.deak@intel.com> Date: Wed Aug 16 17:46:07 2017 +0300 drm/i915/gen9+: Set same power state before hibernation image save/restore during hibernation/suspend the power domain functionality got disabled, after which resume could leave it incorrectly disabled if the ACPI target state was S0 during suspend and i915 was not loaded by the loader kernel. This was caused by not considering if we resumed from hibernation as the condition for power domains reiniting. Fix this by simply tracking if we suspended power domains during system suspend and reinit power domains accordingly during resume. This will result in reiniting power domains always when resuming from hibernation, regardless of the platform and whether or not i915 is loaded by the loader kernel. The reason we didn't catch this earlier is that the enabled/disabled state of power domains during PMSG_FREEZE/PMSG_QUIESCE is platform and kernel config dependent: on my SKL the target state is S4 during PMSG_FREEZE and (with the driver loaded in the loader kernel) S0 during PMSG_QUIESCE. On the reporter's machine it's S0 during PMSG_FREEZE but (contrary to this) power domains are not initialized during PMSG_QUIESCE since i915 is not loaded in the loader kernel, or it's loaded but without the DMC firmware being available. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105196 Reported-and-tested-by: amn-bas@hotmail.com Fixes: `dd9f31c7a3` ("drm/i915/gen9+: Set same power state before hibernation image save/restore") Cc: amn-bas@hotmail.com Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180322143642.26883-1-imre.deak@intel.com (cherry picked from commit `0f90603c33`) Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>		2018-03-27 11:20:06 +03:00
Documentation	Merge branch 'etnaviv/next' of https://git.pengutronix.de/git/lst/linux into drm-next	2018-03-23 06:16:51 +10:00
LICENSES	…
arch	x86: devicetree: fix config option around x86_flattree_get_config()	2018-03-04 00:28:55 -08:00
block	…
certs	…
crypto	…
drivers	drm/i915: Fix hibernation with ACPI S0 target state	2018-03-27 11:20:06 +03:00
firmware	…
fs	…
include	Merge branch 'drm-next-4.17' of git://people.freedesktop.org/~agd5f/linux into drm-next	2018-03-26 10:01:11 +10:00
init	…
ipc	…
kernel	…
lib	…
mm	…
net	…
samples	…
scripts	drm: remove drm_mode_object_{un/reference} aliases	2018-03-19 09:09:46 -04:00
security	…
sound	vga_switcheroo: Use device link for HDA controller	2018-03-13 22:58:09 +01:00
tools	…
usr	…
virt	…
.cocciconfig	…
.get_maintainer.ignore	…
.gitattributes	…
.gitignore	…
.mailmap	…
COPYING	…
CREDITS	…
Kbuild	…
Kconfig	…
MAINTAINERS	dt-bindings: display: renesas: Add R-Car LVDS encoder DT bindings	2018-03-07 18:06:29 +02:00
Makefile	…
README	…

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.