linux-kernel - [PATCH RFC 0/4] drm/core: restore suspend/resume calbacks in KMS drm drivers

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Date:	Fri, 03 Oct 2014 10:24:09 +0200
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS)
Cc:	Andrzej Hajda <a.hajda@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	David Airlie <airlied@...ux.ie>,
	Inki Dae <inki.dae@...sung.com>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	Seung-Woo Kim <sw0312.kim@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Daniel Vetter <daniel.vetter@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS),
	linux-kernel@...r.kernel.org (open list),
	linux-samsung-soc@...r.kernel.org (moderated list:ARM/S5P EXYNOS AR...),
	intel-gfx@...ts.freedesktop.org (open list:INTEL DRM DRIVERS...)
Subject: [PATCH RFC 0/4] drm/core: restore suspend/resume calbacks in KMS drm
 drivers

The main intent of this patchset is to allow use of suspend/resume drm driver
callbacks in KMS drivers, as these callbacks seems to me the best place
to implement suspend/resume functionality in drm driver.
Implementing this functionality in master component driver PM ops is problematic
as those callbacks can be called asynchronously regardless of state/existence of
drm device, thus it would require additional synchronization mechanism.

Callbacks re-enabling requires small changes in i915 and exynos driver.
The patchset contains also fix of exynos resume callback.

Regards
Andrzej


Andrzej Hajda (4):
  drm/i915: set PM callbacks only if modeset is turned off
  drm/core: re-enable suspend/resume callbacks for KMS drivers
  drm/exynos: remove master component PM callbacks
  drm/exynos: correct connector->dpms field before resuming

 drivers/gpu/drm/drm_sysfs.c             |  2 --
 drivers/gpu/drm/exynos/exynos_drm_drv.c | 37 ++++++---------------------------
 drivers/gpu/drm/i915/i915_drv.c         |  6 ++----
 3 files changed, 8 insertions(+), 37 deletions(-)

-- 
1.9.1

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