Introduce bus_flags to specify display bus properties like signal
polarities. This is useful for parallel display buses, e.g. to
specify the pixel clock or data enable polarity.
Suggested-by: NThierry Reding <thierry.reding@gmail.com>
Acked-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: NManfred Schlaegl <manfred.schlaegl@gmx.at>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NStefan Agner <stefan@agner.ch>

Don't just free the connector when we get the destroy callback.

Drop a reference to it, and set it's mst_port to NULL so
no more mst work is done on it.

v2: core mst accepts NULLs fine. Cleanup EDID code properly.
v3: drop the extra reference we were taking.
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Take a reference when setting a crtc on a connecter,
also take one when duplicating if a crtc is set,
and drop one on destroy if a crtc is set.

v2: take Daniel Stone's advice and simplify the
ref/unref dances, also take care of NULL as connector
to state reset.

v3: remove need for connector NULL check.
Reviewed-by: NDaniel Stone <daniels@collabora.com>
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NDave Airlie <airlied@redhat.com>

This just takes a reference on the connector when we set a mode
in the non-atomic paths.

v2: Follow Daniel Stone's suggestions on when to take/drop
references.
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: NDaniel Stone <daniels@collabora.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

This takes a reference count when fbdev adds the connector,
and drops it when it removes the connector.

It also drops the now unneeded code to find connectors
and remove the from the modeset as they are reference counted.

v2: drop references when removing all connectors at end.
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: NDaniel Stone <daniels@collabora.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

This uses the previous changes to add reference counts
to drm connector objects.

v2: move fbdev changes to their own patch.
add some kerneldoc
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: NDaniel Stone <daniels@collabora.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: NDaniel Stone <daniels@collabora.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Ofc I promise just a few leftovers for drm-misc and somehow it's the
biggest pull. But really mostly trivial stuff:
- MAINTAINERS updates from Emil
- rename async to nonblock in atomic_commit to avoid the confusion between
  nonblocking ioctl and async flip (= not vblank synced), from Maarten.
  Needs to be regened with newer drivers, but probably only after -rc1 to
  catch them all.
- actually lockless gem_object_free, plus acked driver conversion patches.
  All the trickier prep stuff already is in drm-next.
- Noralf's nice work for generic defio support in our fbdev emulation.
  Keeps the udl hack, and qxl is tested by Gerd.

* tag 'topic/drm-misc-2016-05-04' of git://anongit.freedesktop.org/drm-intel: (47 commits)
  drm: Fixup locking WARN_ON mistake around gem_object_free_unlocked
  drm/etnaviv: Use lockless gem BO free callback
  drm/imx: Use lockless gem BO free callback
  drm/radeon: Use lockless gem BO free callback
  drm/amdgpu: Use lockless gem BO free callback
  drm/gem: support BO freeing without dev->struct_mutex
  MAINTAINERS: Add myself for the new VC4 (RPi GPU) graphics driver.
  MAINTAINERS: Add a bunch of legacy (UMS) DRM drivers
  MAINTAINERS: Add a few DRM drivers by Dave Airlie
  MAINTAINERS: List the correct git repo for the Renesas DRM drivers
  MAINTAINERS: Update the files list for the Renesas DRM drivers
  MAINTAINERS: Update the files list for the Armada DRM driver
  MAINTAINERS: Update the files list for the Rockchip DRM driver
  MAINTAINERS: Update the files list for the Exynos DRM driver
  MAINTAINERS: Add maintainer entry for the VMWGFX DRM driver
  MAINTAINERS: Add maintainer entry for the MSM DRM driver
  MAINTAINERS: Add maintainer entry for the Nouveau DRM driver
  MAINTAINERS: Update the files list for the Etnaviv DRM driver
  MAINTAINERS: Remove unneded wildcard for the i915 DRM driver
  drm/atomic: Add WARN_ON when state->acquire_ctx is not set.
  ...

Embarrassingly while fixing up the old paths for i915 I managed to
misplace a locking check for the new _unlocked paths. That's what I
get for not retesting on radeon.

Fixes: 9f0ba539 ("drm/gem: support BO freeing without dev->struct_mutex")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Tested-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>

No dev->struct_mutex anywhere to be seen.

Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Acked-by: NLucas Stach <l.stach@pengutronix.de>
Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-17-git-send-email-daniel.vetter@ffwll.ch

No dev->struct_mutex anywhere to be seen.

Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Acked-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-20-git-send-email-daniel.vetter@ffwll.ch

No dev->struct_mutex anywhere to be seen.

Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-24-git-send-email-daniel.vetter@ffwll.ch

No dev->struct_mutex anywhere to be seen.

Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-11-git-send-email-daniel.vetter@ffwll.ch

Finally all the core gem and a lot of drivers are entirely free of
dev->struct_mutex depencies, and we can start to have an entirely
lockless unref path.

To make sure that no one who touches the core code accidentally breaks
existing drivers which still require dev->struct_mutex I've made the
might_lock check unconditional.

While at it de-inline the ref/unref functions, they've become a bit
too big.

v2: Make it not leak like a sieve.

v3: Review from Lucas:
- drop != NULL in pointer checks.
- fixup copypasted kerneldoc to actually match the functions.

v4:
Add __drm_gem_object_unreference as a fastpath helper for drivers who
abolished dev->struct_mutex, requested by Chris.

v5: Fix silly mistake in drm_gem_object_unreference_unlocked caught by
intel-gfx CI - I checked for gem_free_object instead of
gem_free_object_unlocked ...

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de> (v3)
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> (v4)
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1462178451-1765-1-git-send-email-daniel.vetter@ffwll.ch

drm-hisilicon-next for 4.7

Add new hisilicon kirin drm driver:
- Add maintainer for hisilicon DRM driver
- Add support for external bridge
- Add designware dsi host driver
- Add designware dsi encoder driver
- Add cma fbdev and hotplug
- Add vblank driver for ADE
- Add plane driver for ADE
- Add crtc driver for ADE
- Add hisilicon kirin drm master driver
- Add device tree binding for hi6220 display subsystem

* tag 'drm-hisilicon-next-2016-04-29' of github.com:xin3liang/linux:
  MAINTAINERS: Add maintainer for hisilicon DRM driver
  drm/hisilicon: Add support for external bridge
  drm/hisilicon: Add designware dsi host driver
  drm/hisilicon: Add designware dsi encoder driver
  drm/hisilicon: Add cma fbdev and hotplug
  drm/hisilicon: Add vblank driver for ADE
  drm/hisilicon: Add plane driver for ADE
  drm/hisilicon: Add crtc driver for ADE
  drm/hisilicon: Add hisilicon kirin drm master driver
  drm/hisilicon: Add device tree binding for hi6220 display subsystem

Here are a few amdkfd patches for 4.7, all of them fixes according to
the Coccinelle tool.

* tag 'drm-amdkfd-next-2016-05-04' of git://people.freedesktop.org/~gabbayo/linux:
  amdkfd: Trim unnescessary intermediate err var in kfd_chardev.c
  amdkfd: Trim off unnescessary semicolon from kfd_packet_manager.c
  amdkfd: Use the canonical form in branch predicates

Merge branch 'drm-rockchip-next-fixes-05-03' of https://github.com/markyzq/kernel-drm-rockchip into drm-next

Here are some little fixes for rockchip drm, looks good for me, and seems there is no doubt on them, So I'd like you can land them.

* 'drm-rockchip-next-fixes-05-03' of https://github.com/markyzq/kernel-drm-rockchip:
  drm/rockchip: vop: Initialize vskiplines to zero
  drm/rockchip: vop: fix iommu crash with async atomic
  drm/rockchip: support non-iommu buffer path
  drm/rockchip: get rid of rockchip_drm_crtc_mode_config
  drm/rockchip: inno_hdmi: fix an error code
  drm/rockchip: don't leak iommu mapping
  drm/rockchip: remove redundant statement

Merge branch 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next

Summary:
 - Support for pipeline clock between KMS drivers.
   . Exynos SoC is required to control clocks across KMS drivers
     according to Exynos SoC version. So this patch refactos
     some relevant codes and provides generic solution for it.
 - Add Exynos5433 SoC support to HDMI parts - HDMI and DECON-TV.
 - Add HW trigger mode support to CRTC drivers.
   . In case of using i80 Panel, some Exynos SoC supports HW trigger
     mode so this patch makes trigger mode - HW or SW trigger - to be
     set according to SoC version properly.
 - And some cleanups and regression fixups.

* 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos: (39 commits)
  drm/exynos: clean up register definions for fimd and decon
  drm/exynos: decon: clean up interface type
  drm/exynos: fimd: add HW trigger support
  drm/exynos: clean up wait_for_vblank
  drm/exynos: mixer: use generic of_device_get_match_data helper
  drm/exynos: mixer: remove support for non-dt platforms
  drm/exynos: hdmi: use generic of_device_get_match_data helper
  drm/exynos: rotator: use generic of_device_get_match_data helper
  drm/exynos: fimd: use generic of_device_get_match_data helper
  drm/exynos: dsi: use generic of_device_get_match_data helper
  drm/exynos: exynos5433_decon: use generic of_device_get_match_data helper
  drm/exynos: convert clock_enable crtc callback to pipeline clock
  drm/exynos/mixer: enable HDMI-PHY before configuring MIXER
  drm/exynos/decon5433: enable HDMI-PHY before configuring DECON
  drm/exynos: add support for pipeline clock to the framework
  drm/exynos: add helper to get crtc from pipe
  drm/exynos/decon5433: do not protect window in plane disable
  drm/exynos/decon5433: reset decon on start
  drm/exynos/decon5433: fix DECON standalone update
  drm/exynos/hdmi: remove registry dump
  ...

This pull request brings in DPI panel support, gamma ramp support, and
render nodes for vc4.

* tag 'drm-vc4-next-2016-05-02' of https://github.com/anholt/linux:
  drm/vc4: Add missing render node support
  drm/vc4: Add support for gamma ramps.
  drm/vc4: Fix NULL deref in HDMI init error path
  drm/vc4: Add DPI driver
  drm: Add an encoder and connector type enum for DPI.

- prep work for struct_mutex-less gem_free_object
- more invasive/tricky mst fixes from Lyude for broken hw. I discussed
  this with Ville/Jani and we all agreed more soaking in -next would be
  real good this late in the -rc cycle. They're cc: stable too to make
  sure they're not getting lost. Feel free to cherry-pick those four if
  you disagree.
- few small things all over

* tag 'topic/drm-misc-2016-04-29' of git://anongit.freedesktop.org/drm-intel:
  drm/atomic: Add missing drm_crtc_internal.h include
  drm/dp: Allow signals to interrupt drm_aux-dev reads/writes
  drm: Quiet down drm_mode_getresources
  drm: Quiet down drm_mode_getconnector
  drm: Protect dev->filelist with its own mutex
  drm: Make drm_vm_open/close_locked private to drm_vm.c
  drm: Hide master MAP cleanup in drm_bufs.c
  drm: Forbid legacy MAP functions for DRIVER_MODESET
  drm: Push struct_mutex into ->master_destroy
  drm: Move drm_getmap into drm_bufs.c and give it a legacy prefix
  drm: Put legacy lastclose work into drm_legacy_dev_reinit
  drm: Give drm_agp_clear drm_legacy_ prefix
  drm/sysfs: Annote lockless show functions with READ_ONCE
  MAINTAINERS: Update the files list for the GMA500 DRM driver
  drm: rcar-du: Fix compilation warning
  drm/i915: Get rid of intel_dp_dpcd_read_wake()
  drm/dp_helper: Perform throw-away read before actual read in drm_dp_dpcd_read()
  drm/dp_helper: Retry aux transactions on all errors
  drm/dp_helper: Always wait before retrying native aux transactions

- more userptr cornercase fixes from Chris
- clean up and tune forcewake handling (Tvrtko)
- more underrun fixes from Ville, mostly for ilk to appeas CI
- fix unclaimed register warnings on vlv/chv and enable the debug code to catch
  them by default (Ville)
- skl gpu hang fixes for gt3/4 (Mika Kuoppala)
- edram improvements for gen9+ (Mika again)
- clean up gpu reset corner cases (Chris)
- fix ctx/ring machine deaths on snb/ilk (Chris)
- MOCS programming for all engines (Peter Antoine)
- robustify/clean up vlv/chv irq handler (Ville)
- split gen8+ irq handlers into ack/handle phase (Ville)
- tons of bxt rpm fixes (mostly around firmware interactions), from Imre
- hook up panel fitting for dsi panels (Ville)
- more runtime PM fixes all over from Imre
- shrinker polish (Chris)
- more guc fixes from Alex Dai and Dave Gordon
- tons of bugfixes and small polish all over (but with a big focus on bxt)

* tag 'drm-intel-next-2016-04-25' of git://anongit.freedesktop.org/drm-intel: (142 commits)
  drm/i915: Update DRIVER_DATE to 20160425
  drm/i915/bxt: Explicitly clear the Turbo control register
  drm/i915: Correct the i915_frequency_info debugfs output
  drm/i915: Macros to convert PM time interval values to microseconds
  drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW
  drm/i915: Fake HDMI live status
  drm/i915/bxt: Force reprogramming a PHY with invalid HW state
  drm/i915/bxt: Wait for PHY1 GRC done if PHY0 was already enabled
  drm/i915/bxt: Use PHY0 GRC value for HW state verification
  drm/i915: use dev_priv directly in gen8_ppgtt_notify_vgt
  drm/i915/bxt: Enable DC5 during runtime resume
  drm/i915/bxt: Sanitize DC state tracking during system resume
  drm/i915/bxt: Don't uninit/init display core twice during system suspend/resume
  drm/i915: Inline intel_suspend_complete
  drm/i915/kbl: Don't WARN for expected secondary MISC IO power well request
  drm/i915: Fix eDP low vswing for Broadwell
  drm/i915: check for ERR_PTR from i915_gem_object_pin_map()
  drm/i915/guc: local optimisations and updating comments
  drm/i915/guc: drop cached copy of 'wq_head'
  drm/i915/guc: keep GuC doorbell & process descriptor mapped in kernel
  ...

Signed-off-by: NEric Anholt <eric@anholt.net>
[Emil Velikov: drop wildcard, add UAPI and Documentation files]
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1462283659-1314-1-git-send-email-emil.l.velikov@gmail.com

Pretty much all of these hasn't seen any action singe 2008 at the very
least. Barring the occasional buildfix and DRM-wide refactoring of
course.

Note: some distributions have stopped shipping their userspace
counterparts for a while. Although some still do.
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Almost exclusively done by Dave Airlie.

Explicitly list him as a maintainer and classify them as "Odd Fixes" as I
doubt he's got much time for them these days.

Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-14-git-send-email-emil.l.velikov@gmail.com

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-renesas-soc@vger.kernel.org
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-10-git-send-email-emil.l.velikov@gmail.com

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-renesas-soc@vger.kernel.org
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-9-git-send-email-emil.l.velikov@gmail.com

Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-8-git-send-email-emil.l.velikov@gmail.com

The location listed is a folder - swap the wildcard with '/'

Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-6-git-send-email-emil.l.velikov@gmail.com

Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-4-git-send-email-emil.l.velikov@gmail.com

Thomas is one of the original authors of the driver, with recent
contributions from Sinclair and Brian.

v2: Add Sinclair as maintainer. Add Sinclair+Thomas's tree, use
Supported as status.

Cc: Sinclair Yeh <syeh@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Brian Paul <brianp@vmware.com>
Cc: "VMware Graphics" <linux-graphics-maintainer@vmware.com>
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: NSinclair Yeh <syeh@vmware.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1462230939-26389-1-git-send-email-emil.l.velikov@gmail.com

Rob and Archit are the main developers behind the driver.

v2: Removing Archit for now, correcting the status and adding
linux-arm-msm@ mailing list.

Cc: Rob Clark <robdclark@gmail.com>
Cc: Archit Taneja <architt@codeaurora.org>
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Acked-by: NRob Clark <robdclark@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1462230888-26319-1-git-send-email-emil.l.velikov@gmail.com

Ben has been the maintainer of the driver even before it got included in
the kernel.

Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Acked-by: NBen Skeggs <bskeggs@redhat.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-11-git-send-email-emil.l.velikov@gmail.com

Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Russell King <linux+etnaviv@arm.linux.org.uk>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-7-git-send-email-emil.l.velikov@gmail.com

There is no other file but the UAPI header, thus we can drop the
wildcard.

Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Acked-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-3-git-send-email-emil.l.velikov@gmail.com

When I was writing an atomic wrapper for rmfb, I ran into the
following backtrace from lockdep:

=============================================
[ INFO: possible recursive locking detected ]
4.5.0-patser+ #4696 Tainted: G     U
---------------------------------------------
kworker/2:2/2608 is trying to acquire lock:
 (crtc_ww_class_mutex){+.+.+.}, at: [<ffffffffc00c9ddc>] drm_modeset_lock+0x7c/0x120 [drm]

but task is already holding lock:
 (crtc_ww_class_mutex){+.+.+.}, at: [<ffffffffc00c98cd>] modeset_backoff+0x8d/0x220 [drm]

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(crtc_ww_class_mutex);
  lock(crtc_ww_class_mutex);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by kworker/2:2/2608:
 #0:  ("events"){.+.+.+}, at: [<ffffffff810a5eea>] process_one_work+0x15a/0x6c0
 #1:  ((&arg.work)){+.+.+.}, at: [<ffffffff810a5eea>] process_one_work+0x15a/0x6c0
 #2:  (crtc_ww_class_acquire){+.+.+.}, at: [<ffffffffc004532a>] drm_atomic_helper_remove_fb+0x4a/0x1d0 [drm_kms_helper]
 #3:  (crtc_ww_class_mutex){+.+.+.}, at: [<ffffffffc00c98cd>] modeset_backoff+0x8d/0x220 [drm]

While lockdep probably catches this bug when it happens, it's better
to explicitly warn when state->acquire_ctx is not set.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1462266751-29123-1-git-send-email-maarten.lankhorst@linux.intel.com

The fsl dcu now uses the clk-provider interfaces, which are not available
when CONFIG_COMMON_CLK is disabled:

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c: In function 'fsl_dcu_drm_probe':
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c:362:20: error: implicit declaration of function '__clk_get_name' [-Werror=implicit-function-declaration]
  pix_clk_in_name = __clk_get_name(pix_clk_in);

This adds a Kconfig dependency to prevent the driver from being enabled
in this case.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: 2d701449 ("drm/fsl-dcu: use common clock framework for pixel clock divider")
Acked-by: NStefan Agner <stefan@agner.ch>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1462186839-2224021-1-git-send-email-arnd@arndb.de

There is a path that use vskiplines with non-initialize.
That would cause vop abnormal behavior.
Signed-off-by: NMark Yao <mark.yao@rock-chips.com>

After async atomic_commit callback, drm_atomic_clean_old_fb will
clean all old fb, but because async, the old fb may be also on
the vop hardware, dma will access the old fb buffer, clean old
fb will cause iommu page fault.

Reference the fb and unreference it when the fb actuall swap out
from vop hardware.
Signed-off-by: NMark Yao <mark.yao@rock-chips.com>

Some rockchip vop not support iommu, need use non-iommu
buffer for it. And if we get iommu issues, we can compare
the issues with non-iommu path, that would help the debug.
Signed-off-by: NMark Yao <mark.yao@rock-chips.com>

We need to take care of the vop status when use
rockchip_drm_crtc_mode_config, if vop is disabled,
the function would failed, that is terrible.

Save output_type and output_mode into rockchip_crtc_state,
it's nice to make them into atomic.
Signed-off-by: NMark Yao <mark.yao@rock-chips.com>
Tested-by: NJohn Keeping <john@metanate.com>