Fix to return error code -ENOMEM from the malloc error handling
case instead of 0, as done elsewhere in this function.
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170209151907.28800-1-weiyj.lk@gmail.com

For consistency and all that, roll them out.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1484559464-27107-4-git-send-email-maarten.lankhorst@linux.intel.com

This kills another dereference of connector->state. connector_mask
holds all unchanged connectors at least and any changed connectors
are already in state anyway.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1484559464-27107-3-git-send-email-maarten.lankhorst@linux.intel.com

Add for_each_(old)(new)_(plane,connector,crtc)_in_state iterators to
replace the old for_each_xxx_in_state ones. This is useful for >1 flip
depth and getting rid of all xxx->state dereferences.

This requires extra fixups done when committing a state after
duplicating, which in general isn't valid but is used by suspend/resume.
To handle these, introduce drm_atomic_helper_commit_duplicated_state
which performs those fixups before checking & committing the state.

Changes since v1:
- Remove nonblock parameter for commit_duplicated_state.
Changes since v2:
- Use commit_duplicated_state for i915 load detection.
- Add WARN_ON(old_state != obj->state) before swapping.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1484559464-27107-2-git-send-email-maarten.lankhorst@linux.intel.com

Fixes the following sparse warning:

drivers/gpu/drm/bridge/ti-tfp410.c:223:24: warning:
 symbol 'tfp410_platform_driver' was not declared. Should it be static?
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170209152549.30711-1-weiyj.lk@gmail.com

The drm_mode_config helper private field points to a structure of
function pointers that don't need to be modified at runtime. Make it
const.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: NGabriel Krisman Bertazi <krisman@collabora.co.uk>
Acked-by: NBrian Starkey <brian.starkey@arm.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170102091613.6310-1-laurent.pinchart@ideasonboard.com

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.

The functions are moved around to save forward declaration.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Reviewed-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-24-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Eric Anholt <eric@anholt.net>
Reviewed-by: NEric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-23-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.

While at it, the 'return' of .disable_vblank is dropped to fix the
following checkpatch warning.

 WARNING: void function return statements are not generally useful
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Jyri Sarha <jsarha@ti.com>
Acked-by: NJyri Sarha <jsarha@ti.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-22-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.

As the result, the wrapper functions tegra_drm_xxx get killed
completely, and tegra_dc_xxx are filled into struct drm_crtc_funcs as
vblank hooks directly.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Acked-by: NThierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-21-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-20-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.

As the result, shmob_drm_crtc_enable_vblank() becomes a static function,
although it gets moved around a bit to save forward declaration.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-19-git-send-email-shawnguo@kernel.org

With the vblank hooks in struct drm_crtc_funcs, we do not need to
maintain struct rockchip_crtc_funcs and the related registration
functions.  Remove them.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Mark Yao <mark.yao@rock-chips.com>
Reviewed-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-18-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-17-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: NNeil Armstrong <narmstrong@baylibre.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-15-git-send-email-shawnguo@kernel.org

With the vblank hooks in struct drm_crtc_funcs, we do not need to
maintain the CRTC specific vblank callbacks with struct
imx_drm_crtc_helper_funcs any more.  By moving the stuff that we
currently do in imx_drm_add_crtc(), like of_node setting and
drm_crtc_helper_add()/drm_crtc_init_with_planes() invoking, we can kill
things like struct imx_drm_crtc, imx_drm_crtc_helper_funcs and related
functions completely.

Functions ipu_enable_vblank() and ipu_disable_vblank() are moved around
without changes, only for saving the forward declarations.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-13-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Xinliang Liu <z.liuxinliang@hisilicon.com>
Reviewed-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-11-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

It's common to share screens within CI labs, and it's also common for
KVM switches to alter the contents of the CEA block but leave the
checksum outdated.

So in this case, print a debug message instead of an error.

References: https://bugs.freedesktop.org/show_bug.cgi?id=98228
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Signed-off-by: NTomeu Vizoso <tomeu.vizoso@collabora.com>
Tested-by: NJari Tahvanainen <jari.tahvanainen@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1481202716-31317-1-git-send-email-tomeu.vizoso@collabora.com

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Stefan Agner <stefan@agner.ch>
Acked-by: NStefan Agner <stefan@agner.ch>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-10-git-send-email-shawnguo@kernel.org

If dsi_connector fails to allocate, the exit path via label 'fail'
checks if connector is null, which it always is, so the cleanup
that destroys connector is never going to be called.  Hence the
failure path can be more optimally performed by removing this
and just returning ERR_PTR(-ENOMEM).  This also removes the need
to initialize connector to NULL, and we can also remove ret too.

Detected by CoverityScan, CID#1399504 ("Logicall Dead Code")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NEric Anholt <eric@anholt.net>
Reviewed-by: NGustavo Padovan <gustavo.padovan@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170203195624.7189-1-colin.king@canonical.com

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.

As the result, exynos_drm_crtc_enable[disable]_vblank() become static
functions.  They are moved around a bit to save forward declaration
though.  Also while at it, we move one step further to kill
exynos_drm_crtc_from_pipe() completely by updating hdmi_bind() a bit.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Inki Dae <inki.dae@samsung.com>
Reviewed-by: NAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-9-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-8-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.  As the result,
functions armada_drm_crtc_enable[disable]_irq() can be static, although
they are moved around a bit to save forward declaration.

The armada_crtc pointer array in struct armada_private is still kept in
there, because armada_debugfs.c still have reference to it.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Russell King <linux@armlinux.org.uk>
Acked-by: NRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-7-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Mali DP Maintainers <malidp@foss.arm.com>
Acked-by: NLiviu Dudau <liviu.dudau@arm.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-6-git-send-email-shawnguo@kernel.org

The vblank hooks in struct drm_driver are deprecated and only meant for
legacy drivers.  For modern drivers with DRIVER_MODESET flag, the hooks
in struct drm_crtc_funcs should be used instead.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Acked-by: NLiviu Dudau <liviu.dudau@arm.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-5-git-send-email-shawnguo@kernel.org

The function drm_vblank_no_hw_counter() is now only used in core vblank
wrapper code.  Let's unexport it by making it a static function.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-4-git-send-email-shawnguo@kernel.org

Core code already makes drm_driver.get_vblank_counter hook optional by
letting drm_vblank_no_hw_counter be the default implementation for the
function hook.  So the drm_vblank_no_hw_counter assignment in the driver
code becomes redundant and can be removed now.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Mali DP Maintainers <malidp@foss.arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Xinliang Liu <z.liuxinliang@hisilicon.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Jyri Sarha <jsarha@ti.com>
Cc: Eric Anholt <eric@anholt.net>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NNeil Armstrong <narmstrong@baylibre.com>
Acked-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NAlexey Brodkin <abrodkin@synopsys.com>
Acked-by: NLiviu Dudau <liviu.dudau@arm.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-3-git-send-email-shawnguo@kernel.org

The vblank is mostly CRTC specific and implemented as part of CRTC
driver.  Let's keep the vblank hooks struct drm_driver for legacy
drivers, and add corresponding hooks in struct drm_crtc_funcs.  These
hooks take struct drm_crtc pointer as argument, and will be called by
core vblank handling code for DRIVER_MODESET drivers.

The new hooks get plugged into core by adding wrapper functions for
vblank handling code.  The .get_vblank_counter hook is effectively
optional, as we provide drm_vblank_no_hw_counter() as the default
fallback in the wrapper function.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Reviewed-by: NAndrzej Hajda <a.hajda@samsung.com>
Acked-by: NThierry Reding <treding@nvidia.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-2-git-send-email-shawnguo@kernel.org

Noticed that everyone duplicates the same logic here and we could safe
a few lines per driver. Yay for lots of drivers to make such tiny
refactors worth-while!

v2: Forgot to git add everything :(

v3: Actually remove release_fbi (Sean, Emil, Chris) ...

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: NSean Paul <seanpaul@chromium.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170207161603.17611-1-daniel.vetter@ffwll.ch

While reviewing Chris' patches to properly cancel our async workers I
checked that this happens after the fbdev is already unregistered.
That's the case, but I found a small gap in our docs, fill that in.

Note that I don't explain what release_fbi does, because that function
will disappear in the next patch ...

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170207141050.1129-1-daniel.vetter@ffwll.ch

This commit adds a TODO list to the GPU driver developer's guide. The
content was taken from the DRMJanitors page on the X.Org wiki:

	https://www.x.org/wiki/DRMJanitors/

The goal is to track a list of refactorings that would be nice to see
merged eventually. Sometimes these would be encountered during patch
review on the mailing list, and at other times one can come across
these while working in a specific area of code.
Signed-off-by: NThierry Reding <treding@nvidia.com>
Acked-by: NSean Paul <seanpaul@chromium.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170207175113.2793-1-thierry.reding@gmail.com

As we require valid start/end parameters, we can replace the initial
potential NULL with a pointer to the drm_mm.head_node and so reduce the
test on every iteration from a NULL + address comparison to just an
address comparison.

add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-26 (-26)
function                                     old     new   delta
i915_gem_evict_for_node                      719     693     -26

(No other users outside of the test harness.)
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170204111913.12416-1-chris@chris-wilson.co.uk

Fixes the following sparse warning:

drivers/gpu/drm/mxsfb/mxsfb_drv.c:129:38: warning:
 symbol 'mxsfb_funcs' was not declared. Should it be static?
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170205160538.16594-1-weiyj.lk@gmail.com

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170205160036.7364-1-weiyj.lk@gmail.com

v2:
Update code after flip_flags moved from plane_state
to crtc_state

v5:
Rename to pageflip_flags.
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAndrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1486072591-3893-3-git-send-email-Andrey.Grodzovsky@amd.com

Allows using atomic flip helpers for drivers
using ASYNC flip.
Remove ASYNC_FLIP restriction in helpers and
caches the page flip flags in drm_crtc_state
to be used in the low level drivers.

v2:
Resending the patch since the original was broken.

v3:
Save flag in crtc_state instead of plane_state

v4:
Reset the flag before using again.

v5:
Fix type in header.
Rename the field to pageflip_flags.
Remove unrelated hunk.
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAndrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1486072591-3893-2-git-send-email-Andrey.Grodzovsky@amd.com

Check that if we request bottom-up allocation from drm_mm_insert_node()
we receive the next available hole from the bottom.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170202114434.3060-2-chris@chris-wilson.co.uk

The drm_mm range manager claimed to support top-down insertion, but it
was neither searching for the top-most hole that could fit the
allocation request nor fitting the request to the hole correctly.

In order to search the range efficiently, we create a secondary index
for the holes using either their size or their address. This index
allows us to find the smallest hole or the hole at the bottom or top of
the range efficiently, whilst keeping the hole stack to rapidly service
evictions.

v2: Search for holes both high and low. Rename flags to mode.
v3: Discover rb_entry_safe() and use it!
v4: Kerneldoc for enum drm_mm_insert_mode.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Sinclair Yeh <syeh@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com> # vmwgfx
Reviewed-by: Lucas Stach <l.stach@pengutronix.de> #etnaviv
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170202210438.28702-1-chris@chris-wilson.co.uk

Yet another backmerge to get at latest etnaviv code, which is need for
Chris' drm_mm patch.
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>