openwrt/staging/blogic.git
8 years agodrm: sun4i: tv: Add PAL output standard
Maxime Ripard [Thu, 29 Oct 2015 08:39:41 +0000 (09:39 +0100)]
drm: sun4i: tv: Add PAL output standard

Now that we have support for the composite output, we can start adding new
supported standards. Start with PAL, and we will add other eventually.

Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
8 years agodrm: sun4i: Add composite output
Maxime Ripard [Thu, 29 Oct 2015 08:39:01 +0000 (09:39 +0100)]
drm: sun4i: Add composite output

Some Allwinner SoCs have an IP called the TV encoder that is used to output
composite and VGA signals. In such a case, we need to use the second TCON
channel.

Add support for that TV encoder.

Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
8 years agodrm: sun4i: Add RGB output
Maxime Ripard [Thu, 29 Oct 2015 08:37:32 +0000 (09:37 +0100)]
drm: sun4i: Add RGB output

One of the A10 display pipeline possible output is an RGB interface to
drive LCD panels directly. This is done through the first channel of the
TCON that will output our video signals directly.

Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
8 years agodrm: Add Allwinner A10 Display Engine support
Maxime Ripard [Thu, 29 Oct 2015 08:36:23 +0000 (09:36 +0100)]
drm: Add Allwinner A10 Display Engine support

The Allwinner A10 and subsequent SoCs share the same display pipeline, with
variations in the number of controllers (1 or 2), or the presence or not of
some output (HDMI, TV, VGA) or not.

Add a driver with a limited set of features for now, and we will hopefully
support all of them eventually

Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
8 years agodrm: sun4i: Add DT bindings documentation
Maxime Ripard [Fri, 30 Oct 2015 13:25:05 +0000 (14:25 +0100)]
drm: sun4i: Add DT bindings documentation

The display pipeline of the Allwinner A10 is involving several loosely
coupled components.

Add a documentation for the bindings.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
8 years agodrm: fb: Add seq_file definition
Maxime Ripard [Mon, 8 Feb 2016 12:58:56 +0000 (13:58 +0100)]
drm: fb: Add seq_file definition

Otherwise, building with DEBUG_FS enabled will trigger a build warning
because we're using a structure that has not been declared.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
8 years agodrm: Switch blobs to the new generic modeset obj refcounting
Daniel Vetter [Fri, 22 Apr 2016 20:10:30 +0000 (22:10 +0200)]
drm: Switch blobs to the new generic modeset obj refcounting

Need to move the free function around a bit, but otherwise mostly
just removing code.

Specifically we can nuke all the _locked variants since the weak idr
reference is now protected by the idr_mutex, which we never hold
anywhere expect in the lookup/reg/unreg functions. And those never
call anything else.

Another benefit of this is that this patch switches the weak reference
logic from kref_put_mutex to kref_get_unless_zero. And the later is in
general more flexible wrt accomodating multiple weak references
protected by different locks, which might or might not come handy
eventually.

But one consequence of that switch is that we need to acquire the
blob_lock from the free function for the list_del calls. That's a bit
tricky to pull off, but works well if we pick the exact same scheme as
is already used for framebuffers. Most important changes:

- filp list is maintainer by create/destroy_blob ioctls directly
  (already the case, so we can just remove the redundant list_del from
  the free function).

- filp close handler walks the filp-private list lockless - works
  because we know no one else can access it. I copied the same comment
  from the fb code over to explain this.

- Otherwise we need to sufficiently restrict blob_lock critical
  sections to avoid all the unreference calls. Easy to do once the
  blob_lock only protects the list, and no longer the weak reference.

Cc: Dave Airlie <airlied@gmail.com>
Cc: Daniel Stone <daniels@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/atomic-helpers: Don't duplicate code in destroy helpers
Daniel Vetter [Fri, 22 Apr 2016 20:10:29 +0000 (22:10 +0200)]
drm/atomic-helpers: Don't duplicate code in destroy helpers

Random drive-by refactoring I spotted.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm: Fix fb leaks and WARN spew in get/set_prop ioctls
Daniel Vetter [Fri, 22 Apr 2016 20:10:28 +0000 (22:10 +0200)]
drm: Fix fb leaks and WARN spew in get/set_prop ioctls

Dave Airlie had at least the refcount leak fixed in a later patch (but
that patch does other things which need a bit more work). But we still
have the trouble that silly userspace could hit the WARN_ON in
drm_mode_object_find.

Fix this all up to make sure we don't leak objects, and don't spew
into demsg.

Fixes: d0f37cf62979 ("drm/mode: move framebuffer reference into object.")
Testcase: igt/kms_addfb_basic/invalid-*-prop*
Cc: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm: Improve kerneldoc for new mode object refcounting
Daniel Vetter [Fri, 22 Apr 2016 20:10:27 +0000 (22:10 +0200)]
drm: Improve kerneldoc for new mode object refcounting

Slipped through the cracks in my review. The one issue I spotted
is that drm_mode_object_find now acquires references and can be
used on FB objects, which caused follow-on bugs in get/set_prop ioctls.
Follow-up patches will fix that.

[airlied: fixup some incr fb/decr object mixups]

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agoMerge branch 'topic-arcpgu-v6' of https://github.com/foss-for-synopsys-dwc-arc-proces...
Dave Airlie [Tue, 26 Apr 2016 23:38:42 +0000 (09:38 +1000)]
Merge branch 'topic-arcpgu-v6' of https://github.com/foss-for-synopsys-dwc-arc-processors/linux into drm-next

This is DRM driver for ARC PGU - simple bitstreamer used on
Synopsys ARC SDP boards (both AXS101 and AXS103).

* 'topic-arcpgu-v6' of https://github.com/foss-for-synopsys-dwc-arc-processors/linux:
  arc: axs10x - add support of ARC PGU
  MAINTAINERS: Add maintainer for ARC PGU display controller
  drm: Add DT bindings documentation for ARC PGU display controller
  drm: Add support of ARC PGU display controller

8 years agodrm/sis: add missing include drm.h for the UAPI header
Emil Velikov [Thu, 21 Apr 2016 20:17:32 +0000 (21:17 +0100)]
drm/sis: add missing include drm.h for the UAPI header

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/qxl: remove XXX comment from the UAPI header
Emil Velikov [Thu, 21 Apr 2016 20:17:27 +0000 (21:17 +0100)]
drm/qxl: remove XXX comment from the UAPI header

One cannot rename the struct at this point, so might as well remove the
comment.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agoMerge branch 'drm/next/du' of git://linuxtv.org/pinchartl/fbdev into drm-next
Dave Airlie [Tue, 26 Apr 2016 23:19:50 +0000 (09:19 +1000)]
Merge branch 'drm/next/du' of git://linuxtv.org/pinchartl/fbdev into drm-next

misc rcar changes.

* 'drm/next/du' of git://linuxtv.org/pinchartl/fbdev:
  drm: rcar-du: Fix compilation warning
  drm: rcar-du: Use ARCH_RENESAS
  drm: rcar-du: Clarify vsp dependency

8 years agoarc: axs10x - add support of ARC PGU
Alexey Brodkin [Fri, 19 Feb 2016 12:19:43 +0000 (15:19 +0300)]
arc: axs10x - add support of ARC PGU

Synopsys DesignWare ARC SDP boards sport ARC SDP display
controller attached to ADV7511 HDMI encoder.

That change adds desctiption of both ARC PGU and ADV7511 in
ARC SDP'd base-board Device Tree.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: devicetree@vger.kernel.org
Cc: linux-snps-arc@lists.infradead.org
8 years agoMAINTAINERS: Add maintainer for ARC PGU display controller
Alexey Brodkin [Fri, 19 Feb 2016 12:34:30 +0000 (15:34 +0300)]
MAINTAINERS: Add maintainer for ARC PGU display controller

This updates MAINTEINERS file with information about maintainer of
ARC PGU display controller driver.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org
8 years agodrm: Add DT bindings documentation for ARC PGU display controller
Alexey Brodkin [Fri, 19 Feb 2016 12:35:52 +0000 (15:35 +0300)]
drm: Add DT bindings documentation for ARC PGU display controller

This add DT bindings documentation for ARC PGU display controller.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: devicetree@vger.kernel.org
Cc: linux-snps-arc@lists.infradead.org
Acked-by: Rob Herring <robh@kernel.org>
8 years agodrm: Add support of ARC PGU display controller
Carlos Palminha [Fri, 19 Feb 2016 12:30:26 +0000 (15:30 +0300)]
drm: Add support of ARC PGU display controller

ARC PGU could be found on some development boards from Synopsys.
This is a simple byte streamer that reads data from a framebuffer
and sends data to the single encoder.

Signed-off-by: Carlos Palminha <palminha@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-snps-arc@lists.infradead.org
8 years agodrm: rcar-du: Fix compilation warning
Laurent Pinchart [Fri, 22 Apr 2016 14:52:45 +0000 (17:52 +0300)]
drm: rcar-du: Fix compilation warning

Commit d63c25e4245a ("drm: rcar-du: Use generic
drm_connector_register_all() helper") left an unused local variable
behind. Remove it.

Fixes: d63c25e4245a ("drm: rcar-du: Use generic drm_connector_register_all() helper")
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
8 years agodrm: rcar-du: Use ARCH_RENESAS
Simon Horman [Fri, 25 Mar 2016 01:38:28 +0000 (10:38 +0900)]
drm: rcar-du: Use ARCH_RENESAS

Make use of ARCH_RENESAS in place of ARCH_SHMOBILE.

This is part of an ongoing process to migrate from ARCH_SHMOBILE to
ARCH_RENESAS the motivation for which being that RENESAS seems to be a more
appropriate name than SHMOBILE for the majority of Renesas ARM based SoCs.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
8 years agodrm: rcar-du: Clarify vsp dependency
Arnd Bergmann [Fri, 26 Feb 2016 11:52:20 +0000 (12:52 +0100)]
drm: rcar-du: Clarify vsp dependency

The VSP1 compositor code in DRM links against the respective V4L
driver, but the dependency is not expressed correctly in Kconfig,
which leads to a build error when the DRM driver is built-in
and the V4L driver is a module:

drivers/gpu/built-in.o: In function `rcar_du_vsp_plane_atomic_update':
rcar-du/rcar_du_vsp.c:183: undefined reference to `vsp1_du_atomic_update'

This patch avoids the problem by ensuring that the DRM VSP code can
only be enabled if the V4L driver is linked into the kernel, or
both are loadable modules.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 6d62ef3ac30b ("drm: rcar-du: Expose the VSP1 compositor through KMS planes")
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
8 years agodrm/modes: stop handling framebuffer special
Dave Airlie [Fri, 15 Apr 2016 05:10:42 +0000 (15:10 +1000)]
drm/modes: stop handling framebuffer special

Since ref counting is in the object now we can just call the
normal interfaces.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/modes: reduce fb_lock to just protecting lists
Dave Airlie [Fri, 15 Apr 2016 05:10:41 +0000 (15:10 +1000)]
drm/modes: reduce fb_lock to just protecting lists

This reduces the fb_lock to just protecting the num_fb/fb_list.

"Previously fb refcounting, and especially the weak reference
(kref_get_unless_zero) used in fb lookups have been protected by fb_lock.
But with the refactoring to share refcounting in the drm_mode_object base
class that switched to being protected by idr_mutex, which means fb_lock
critical sections can be reduced."

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/modes: move reference taking into object lookup.
Dave Airlie [Fri, 15 Apr 2016 05:10:40 +0000 (15:10 +1000)]
drm/modes: move reference taking into object lookup.

When we lookup an ref counted object we now take a proper reference
using kref_get_unless_zero.

Framebuffer lookup no longer needs do this itself.

Convert rmfb to using framebuffer lookup and deal with the fact
it now gets an extra reference that we have to cleanup. This should
mean we can avoid holding fb_lock across rmfb. (if I'm wrong let me
know).

We also now only hold the fbs_lock around the list manipulation.

"Previously fb refcounting, and especially the weak reference
(kref_get_unless_zero) used in fb lookups have been protected by fb_lock.
But with the refactoring to share refcounting in the drm_mode_object base
class that switched to being protected by idr_mutex, which means fb_lock
critical sections can be reduced."

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/mode: reduce lock hold in addfb2
Dave Airlie [Fri, 15 Apr 2016 05:10:39 +0000 (15:10 +1000)]
drm/mode: reduce lock hold in addfb2

No need to hold the lock while assigning the variable.

Daniel wrote:
"Not sure why exactly I put that under the lock, but the only thing that
can race here is rmfb while addfb2 is still doing it's thing, with a
correctly guess (easy to do since they're fully deterministic) fb_id."

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/mode: reduce scope of fb_lock in framebuffer init
Dave Airlie [Fri, 15 Apr 2016 05:10:38 +0000 (15:10 +1000)]
drm/mode: reduce scope of fb_lock in framebuffer init

We don't need to hold the fb lock around the initialisation,
only around the list manipulaton.

So do the lock hold only around the register for now.

From Daniel:
Previously fb refcounting, and especially the weak reference
(kref_get_unless_zero) used in fb lookups have been protected by fb_lock.
But with the refactoring to share refcounting in the drm_mode_object base
class that switched to being protected by idr_mutex, which means fb_lock
critical sections can be reduced.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/mode: use _object_find to find framebuffers.
Dave Airlie [Fri, 15 Apr 2016 05:10:37 +0000 (15:10 +1000)]
drm/mode: use _object_find to find framebuffers.

No point have this code dupliated at this point, use the
_object_find code instead now.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/mode: move framebuffer reference into object.
Dave Airlie [Fri, 15 Apr 2016 05:10:36 +0000 (15:10 +1000)]
drm/mode: move framebuffer reference into object.

This is the initial code to add references to some mode objects.
In the future we need to start reference counting connectors so
firstly I want to reorganise the code so the framebuffer ref counting
uses the same paths.

This patch shouldn't change any functionality, just moves the kref.

[airlied: move kerneldoc as well]
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/mode: introduce wrapper to read framebuffer refcount.
Dave Airlie [Fri, 15 Apr 2016 05:10:35 +0000 (15:10 +1000)]
drm/mode: introduce wrapper to read framebuffer refcount.

Avoids drivers knowing where the kref is stored.

[airlied: add kerneldoc]
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/modes: drop __drm_framebuffer_unregister.
Dave Airlie [Fri, 15 Apr 2016 05:10:34 +0000 (15:10 +1000)]
drm/modes: drop __drm_framebuffer_unregister.

Just use the generic function.

The main side effect of this is that the fb->base.id
is now protected by the idr mutex as well.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/mode: move framebuffer_free up above framebuffer_init
Dave Airlie [Fri, 15 Apr 2016 05:10:33 +0000 (15:10 +1000)]
drm/mode: move framebuffer_free up above framebuffer_init

A later patch will use it in framebuffer_init, and I want
to keep the diff cleaner.

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agodrm/mode: rework drm_mode_object_put to drm_mode_object_unregister.
Dave Airlie [Fri, 15 Apr 2016 05:10:32 +0000 (15:10 +1000)]
drm/mode: rework drm_mode_object_put to drm_mode_object_unregister.

This changes the code to handle being called multiple times without
side effects. The new names seems more suitable for what it does.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agoMerge branch 'drm-atmel-hlcdc-devel' of https://github.com/bbrezillon/linux-at91...
Dave Airlie [Thu, 21 Apr 2016 23:06:44 +0000 (09:06 +1000)]
Merge branch 'drm-atmel-hlcdc-devel' of https://github.com/bbrezillon/linux-at91 into drm-next

This PR contains several improvement and cleanup patches for the
atmel-hlcdc driver to be applied on drm-next (targeting 4.7).

* 'drm-atmel-hlcdc-devel' of https://github.com/bbrezillon/linux-at91:
  drm: atmel-hlcdc: route DMA accesses through AHB interfaces
  drm: atmel-hlcdc: check display mode validity in crtc->mode_fixup()
  drm: atmel-hlcdc: rework the output code to support drm bridges
  drm: atmel-hlcdc: move output mode selection in CRTC implementation
  drm: atmel-hlcdc: support extended timing ranges on sama5d4 and sama5d2
  drm: atmel-hlcdc: remove leftovers from atomic mode setting migration
  drm: atmel-hlcdc: fix connector and encoder types
  drm: atmel-hlcdc: support asynchronous atomic commit operations
  drm: atmel-hlcdc: add a ->cleanup_fb() operation

8 years agoMerge tag 'drm-intel-next-2016-04-11' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Thu, 21 Apr 2016 23:03:31 +0000 (09:03 +1000)]
Merge tag 'drm-intel-next-2016-04-11' of git://anongit.freedesktop.org/drm-intel into drm-next

- make modeset hw state checker atomic aware (Maarten)
- close races in gpu stuck detection/seqno reading (Chris)
- tons&tons of small improvements from Chris Wilson all over the gem code
- more dsi/bxt work from Ramalingam&Jani
- macro polish from Joonas
- guc fw loading fixes (Arun&Dave)
- vmap notifier (acked by Andrew) + i915 support by Chris Wilson
- create bottom half for execlist irq processing (Chris Wilson)
- vlv/chv pll cleanup (Ville)
- rework DP detection, especially sink detection (Shubhangi Shrivastava)
- make color manager support fully atomic (Maarten)
- avoid livelock on chv in execlist irq handler (Chris)

* tag 'drm-intel-next-2016-04-11' of git://anongit.freedesktop.org/drm-intel: (82 commits)
  drm/i915: Update DRIVER_DATE to 20160411
  drm/i915: Avoid allocating a vmap arena for a single page
  drm,i915: Introduce drm_malloc_gfp()
  drm/i915/shrinker: Restrict vmap purge to objects with vmaps
  drm/i915: Refactor duplicate object vmap functions
  drm/i915: Consolidate common error handling in intel_pin_and_map_ringbuffer_obj
  drm/i915/dmabuf: Tighten struct_mutex for unmap_dma_buf
  drm/i915: implement WaClearTdlStateAckDirtyBits
  drm/i915/bxt: Reversed polarity of PORT_PLL_REF_SEL bit
  drm/i915: Rename hw state checker to hw state verifier.
  drm/i915: Move modeset state verifier calls.
  drm/i915: Make modeset state verifier take crtc as argument.
  drm/i915: Replace manual barrier() with READ_ONCE() in HWS accessor
  drm/i915: Use simplest form for flushing the single cacheline in the HWS
  drm/i915: Harden detection of missed interrupts
  drm/i915: Separate out the seqno-barrier from engine->get_seqno
  drm/i915: Remove forcewake dance from seqno/irq barrier on legacy gen6+
  drm/i915: Fixup the free space logic in ring_prepare
  drm/i915: Simplify check for idleness in hangcheck
  drm/i915: Apply a mb between emitting the request and hangcheck
  ...

8 years agoMerge tag 'v4.6-rc3' into drm-next
Dave Airlie [Thu, 21 Apr 2016 22:32:51 +0000 (08:32 +1000)]
Merge tag 'v4.6-rc3' into drm-next

Backmerge 4.6-rc3 for i915.

Linux 4.6-rc3

8 years agoMerge tag 'topic/drm-misc-2016-04-21' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Thu, 21 Apr 2016 20:06:02 +0000 (06:06 +1000)]
Merge tag 'topic/drm-misc-2016-04-21' of git://anongit.freedesktop.org/drm-intel into drm-next

misc pull req all over. Biggest thing is the
drm_connector_(un)register_all cleanup from Alexey for drivers without the
load/unload midlayer hooks. I.e. all the new ones, and a bunch of the
pending new atomic drivers depend upon this. Or at least I asked them to
rebase ;-)

* tag 'topic/drm-misc-2016-04-21' of git://anongit.freedesktop.org/drm-intel:
  drm: Make drm.debug parameter description more helpful
  drm: Remove warning from drm_connector_unregister_all()
  drm: probe_helper: Hide ugly ifdef
  drm: rcar-du: Use generic drm_connector_register_all() helper
  drm: atmel_hldc: Use generic drm_connector_register_all() helper
  drm: Introduce drm_connector_register_all() helper
  drm: fix lut value extraction function
  drm/atomic-helper: Print an error if vblank wait times out
  drm/dp/mst: Restore primary hub guid on resume
  drm: Release driver references to handle before making it available again
  drm/i915/dp/mst: Add source port info to debugfs output
  drm/dp/mst: Enhance DP MST debugfs output
  drm/edid: Add drm_edid_get_monitor_name()
  include/drm: Reword debug categories comment.
  drm/crtc_helper: Reset empty plane state in drm_helper_crtc_mode_set_base()
  drm/virtio: Drop dummy gamma table support
  drm/bochs: Drop fake gamma support
  drm/core: Fix ordering in drm_mode_config_cleanup.

8 years agoMerge tag 'topic/struct_mutex-2016-04-21' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Thu, 21 Apr 2016 19:58:31 +0000 (05:58 +1000)]
Merge tag 'topic/struct_mutex-2016-04-21' of git://anongit.freedesktop.org/drm-intel into drm-next

struct_mutex cleanups and error paths fixes. Unfortunately I didn't manage
to get acks from everyone, but this stuff has been hanging out for months
now and imo simple enough to just land the remaining few patches. But
separate pull request so that you can take a look yourself.

* tag 'topic/struct_mutex-2016-04-21' of git://anongit.freedesktop.org/drm-intel:
  drm/vma_manage: Drop has_offset
  drm/vgem: Drop dev->struct_mutex
  drm/vgem: Move get_pages to gem_create
  drm/vgem: Simplify dumb_map
  drm/exynos: drop struct_mutex from fbdev setup
  drm/exynos: drop struct_mutex from exynos_drm_gem_get_ioctl
  drm/exynos: drop struct_mutex from exynos_gem_map_sgt_with_dma
  drm/exynos: Drop dev->struct_mutex from mmap offset function
  drm/nouveau: Drop dev->struct_mutex from fbdev init
  drm/qxl: Use unlocked gem unreferencing
  drm/omapdrm: Use unlocked gem unreferencing
  drm/nouveau: Use unlocked gem unreferencing

8 years agodrm: Make drm.debug parameter description more helpful
Ezequiel Garcia [Wed, 20 Apr 2016 16:45:03 +0000 (13:45 -0300)]
drm: Make drm.debug parameter description more helpful

Let's be user-friendly and print an actually helpful parameter
description.

This makes modinfo output the debug parameter like this:

parm:           debug:Enable debug output, where each bit enables a debug category.
Bit 0 (0x01) will enable CORE messages (drm core code)
Bit 1 (0x02) will enable DRIVER messages (drm controller code)
Bit 2 (0x04) will enable KMS messages (modesetting code)
Bit 3 (0x08) will enable PRIME messages (prime code)
Bit 4 (0x10) will enable ATOMIC messages (atomic code)
Bit 5 (0x20) will enable VBL messages (vblank code) (int)

Changes from v1:

  * Fixed s/PRMIE/PRIME typo.
  * Add ATOMIC and VBL debug parameter documentation.
  * Prefix the continuation lines with two tabs and
    removed the last new line.
  * Remove spurious whitespace.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461170703-11216-1-git-send-email-ezequiel@vanguardiasur.com.ar
8 years agodrm: Remove warning from drm_connector_unregister_all()
Laurent Pinchart [Wed, 20 Apr 2016 22:21:14 +0000 (01:21 +0300)]
drm: Remove warning from drm_connector_unregister_all()

Commit 6c87e5c3ec6d ("drm: Rename drm_connector_unplug_all() to
drm_connector_unregister_all()") replaced a manual connectors list walk
in drm_connector_unregister_all() with drm_for_each_connector(). The
list was walked without the mode config mutex locked as that ends up in
a clash with sysfs, but drm_connector_unregister_all() warns when the
mutex isn't locked.

The problem is known and doesn't require a large warning every time
drm_connector_unregister_all() is called. Fix it by reverting to manual
list walk.

Fixes: 6c87e5c3ec6d ("drm: Rename drm_connector_unplug_all() to drm_connector_unregister_all()")
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461190874-32674-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com
8 years agodrm: probe_helper: Hide ugly ifdef
Ezequiel Garcia [Tue, 19 Apr 2016 17:40:37 +0000 (14:40 -0300)]
drm: probe_helper: Hide ugly ifdef

Push the ifdef to the drm_edid.h and create a stub, for the
DRM_LOAD_EDID_FIRMWARE=n case. This removes some clutter in
the code, making it more readable.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461087638-16959-1-git-send-email-ezequiel@vanguardiasur.com.ar
8 years agodrm: rcar-du: Use generic drm_connector_register_all() helper
Alexey Brodkin [Tue, 19 Apr 2016 12:24:53 +0000 (15:24 +0300)]
drm: rcar-du: Use generic drm_connector_register_all() helper

Now that a generic drm_connector_register_all() helper exists we may safely
substitute it for the driver-specific implementation of connectors plugging
in sysfs.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: linux-renesas-soc@vger.kernel.org
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461068693-11260-4-git-send-email-abrodkin@synopsys.com
8 years agodrm: atmel_hldc: Use generic drm_connector_register_all() helper
Alexey Brodkin [Tue, 19 Apr 2016 12:24:52 +0000 (15:24 +0300)]
drm: atmel_hldc: Use generic drm_connector_register_all() helper

This driver used to have its own implementation of connector_register_all()
which actually was taken as a prototype of drm_connector_register_all().

Now when drm_connector_register_all() exists reusing it here.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461068693-11260-3-git-send-email-abrodkin@synopsys.com
8 years agodrm: Introduce drm_connector_register_all() helper
Alexey Brodkin [Tue, 19 Apr 2016 12:24:51 +0000 (15:24 +0300)]
drm: Introduce drm_connector_register_all() helper

As a pair to already existing drm_connector_unregister_all() we're adding
generic implementation of what is already done in some drivers.

Once this helper is implemented we'll be ready to switch existing
driver-specific implementations with the generic one.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461068693-11260-2-git-send-email-abrodkin@synopsys.com
8 years agodrm/vma_manage: Drop has_offset
Daniel Vetter [Wed, 30 Mar 2016 09:40:52 +0000 (11:40 +0200)]
drm/vma_manage: Drop has_offset

It's racy, creating mmap offsets is a slowpath, so better to remove it
to avoid drivers doing broken things.

The only user is i915, and it's ok there because everything (well
almost) is protected by dev->struct_mutex in i915-gem.

While at it add a note in the create_mmap_offset kerneldoc that
drivers must release it again. And then I also noticed that
drm_gem_object_release entirely lacks kerneldoc.

Cc: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-14-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/vgem: Drop dev->struct_mutex
Daniel Vetter [Wed, 30 Mar 2016 09:40:51 +0000 (11:40 +0200)]
drm/vgem: Drop dev->struct_mutex

With the previous two changes it doesn't protect anything any more.

v2: Use _unlocked unreference variant.

v3: Appease gcc noise.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-13-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/vgem: Move get_pages to gem_create
Daniel Vetter [Wed, 30 Mar 2016 09:40:50 +0000 (11:40 +0200)]
drm/vgem: Move get_pages to gem_create

vgem doesn't have a shrinker or anything like that and drops backing
storage only at object_free time. There's no use in trying to be
clever and allocating backing storage delayed, it only causes trouble
by requiring locking.

Instead grab pages when we allocate the object right away.

v2: Fix compiling.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-12-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/vgem: Simplify dumb_map
Daniel Vetter [Wed, 30 Mar 2016 09:40:49 +0000 (11:40 +0200)]
drm/vgem: Simplify dumb_map

The offset manager already checks for existing offsets internally,
while holding suitable locks. We can drop this check.

v2: Fix title (Emil).

Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-11-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/exynos: drop struct_mutex from fbdev setup
Daniel Vetter [Wed, 30 Mar 2016 09:40:48 +0000 (11:40 +0200)]
drm/exynos: drop struct_mutex from fbdev setup

Doesn't protect anything at all, and probably just here because a long
time ago dev->struct_mutex was required to allocate gem objects.

With this patch exynos is completely struct_mutex free!

Cc: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-10-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/exynos: drop struct_mutex from exynos_drm_gem_get_ioctl
Daniel Vetter [Wed, 30 Mar 2016 09:40:47 +0000 (11:40 +0200)]
drm/exynos: drop struct_mutex from exynos_drm_gem_get_ioctl

The only things this protects is reading ->flags and ->size, both of
which are invariant over the lifetime of an exynos gem bo. So no
locking needed at all (besides that, nothing protects the writers
anyway).

Aside: exynos_gem_obj->size is redundant with
exynos_gem_obj->base.size and probably should be removed.

v2: Use _unlocked unreference (Daniel Stone).

Cc: Daniel Stone <daniel@fooishbar.org>
Cc: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-9-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/exynos: drop struct_mutex from exynos_gem_map_sgt_with_dma
Daniel Vetter [Wed, 30 Mar 2016 09:40:46 +0000 (11:40 +0200)]
drm/exynos: drop struct_mutex from exynos_gem_map_sgt_with_dma

The sg table isn't refcounted, there's no corresponding locking for
unmapping and drm_map_sg is ok with being called concurrently.

So drop the locking since it doesn't protect anything.

Cc: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-8-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/exynos: Drop dev->struct_mutex from mmap offset function
Daniel Vetter [Wed, 30 Mar 2016 09:40:45 +0000 (11:40 +0200)]
drm/exynos: Drop dev->struct_mutex from mmap offset function

Simply forgotten about this when I was doing my general cleansing of
simple gem mmap offset functions. There's nothing but core functions
called here, and they all have their own protection already.

Aside: DRM_ERROR for userspace controlled input isn't great, but
that's for another patch.

v2: Use _unlocked unreference (Daniel Stone).

Cc: Daniel Stone <daniel@fooishbar.org>
Cc: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-7-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/nouveau: Drop dev->struct_mutex from fbdev init
Daniel Vetter [Wed, 30 Mar 2016 09:40:44 +0000 (11:40 +0200)]
drm/nouveau: Drop dev->struct_mutex from fbdev init

Doesn't protect anything at all.

With this patch nouveau is completely dev->struct_mutex free!

Cc: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-6-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/qxl: Use unlocked gem unreferencing
Daniel Vetter [Wed, 30 Mar 2016 09:40:42 +0000 (11:40 +0200)]
drm/qxl: Use unlocked gem unreferencing

For drm_gem_object_unreference callers are required to hold
dev->struct_mutex, which these paths don't. Enforcing this requirement
has become a bit more strict with

commit ef4c6270bf2867e2f8032e9614d1a8cfc6c71663
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Oct 15 09:36:25 2015 +0200

    drm/gem: Check locking in drm_gem_object_unreference

Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-4-git-send-email-daniel.vetter@ffwll.ch
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-5-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/omapdrm: Use unlocked gem unreferencing
Daniel Vetter [Wed, 30 Mar 2016 09:40:41 +0000 (11:40 +0200)]
drm/omapdrm: Use unlocked gem unreferencing

For drm_gem_object_unreference callers are required to hold
dev->struct_mutex, which these paths don't. Enforcing this requirement
has become a bit more strict with

commit ef4c6270bf2867e2f8032e9614d1a8cfc6c71663
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Oct 15 09:36:25 2015 +0200

    drm/gem: Check locking in drm_gem_object_unreference

Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-3-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/nouveau: Use unlocked gem unreferencing
Daniel Vetter [Wed, 30 Mar 2016 09:40:40 +0000 (11:40 +0200)]
drm/nouveau: Use unlocked gem unreferencing

For drm_gem_object_unreference callers are required to hold
dev->struct_mutex, which these paths don't. Enforcing this requirement
has become a bit more strict with

commit ef4c6270bf2867e2f8032e9614d1a8cfc6c71663
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Oct 15 09:36:25 2015 +0200

    drm/gem: Check locking in drm_gem_object_unreference

Cc: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-2-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm: fix lut value extraction function
Lionel Landwerlin [Tue, 22 Mar 2016 14:10:33 +0000 (14:10 +0000)]
drm: fix lut value extraction function

When extracting the value at full precision (16 bits), no need to
round the value.

This was spotted by Jani when running sparse. Unfortunately this fix
doesn't get rid of the warning.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reported-by: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Stone <daniels@collabora.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: dri-devel@lists.freedesktop.org
Fixes: 5488dc16fde7 ("drm: introduce pipe color correction properties")
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1458655833-19547-1-git-send-email-lionel.g.landwerlin@intel.com
8 years agodrm/atomic-helper: Print an error if vblank wait times out
Ville Syrjälä [Mon, 18 Apr 2016 11:29:33 +0000 (14:29 +0300)]
drm/atomic-helper: Print an error if vblank wait times out

Vblank waits timing out is no a normal thing to happen, so let's inform
people when it happens.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460978973-24945-2-git-send-email-ville.syrjala@linux.intel.com
8 years agodrm/dp/mst: Restore primary hub guid on resume
Lyude [Wed, 13 Apr 2016 20:50:18 +0000 (16:50 -0400)]
drm/dp/mst: Restore primary hub guid on resume

Some hubs are forgetful, and end up forgetting whatever GUID we set
previously after we do a suspend/resume cycle. This can lead to
hotplugging breaking (along with probably other things) since the hub
will start sending connection notifications with the wrong GUID. As
such, we need to check on resume whether or not the GUID the hub is
giving us is valid.

Signed-off-by: Lyude <cpaul@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460580618-7421-1-git-send-email-cpaul@redhat.com
8 years agodrm: Release driver references to handle before making it available again
Chris Wilson [Fri, 15 Apr 2016 11:55:08 +0000 (12:55 +0100)]
drm: Release driver references to handle before making it available again

When userspace closes a handle, we remove it from the file->object_idr
and then tell the driver to drop its references to that file/handle.
However, as the file/handle is already available again for reuse, it may
be reallocated back to userspace and active on a new object before the
driver has had a chance to drop the old file/handle references.

Whilst calling back into the driver, we have to drop the
file->table_lock spinlock and so to prevent reusing the closed handle we
mark that handle as stale in the idr, perform the callback and then
remove the handle. We set the stale handle to point to the NULL object,
then any idr_find() whilst the driver is removing the handle will return
NULL, just as if the handle is already removed from idr.

Note: This will be used to have a direct handle -> vma lookup table,
instead of first a handle -> obj lookup, and then an (obj, vm) -> vma
lookup.

v2: Use NULL rather than an ERR_PTR to avoid having to adjust callers.
idr_alloc() tracks existing handles using an internal bitmap, so we are
free to use the NULL object as our stale identifier.
v3: Needed to update the return value check after changing from using
the stale error pointer to NULL.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: dri-devel@lists.freedesktop.org
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Thierry Reding <treding@nvidia.com>
[danvet: Add note about the use-case.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460721308-32405-1-git-send-email-chris@chris-wilson.co.uk
8 years agodrm/i915/dp/mst: Add source port info to debugfs output
Jim Bride [Thu, 14 Apr 2016 17:18:37 +0000 (10:18 -0700)]
drm/i915/dp/mst: Add source port info to debugfs output

Modify the debugfs output for i915_dp_mst_info to list the source port for
the DP MST topology in question.

v2: rebase
v3: rebase
v4: rebase

cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460654317-31288-3-git-send-email-jim.bride@linux.intel.com
8 years agodrm/dp/mst: Enhance DP MST debugfs output
Jim Bride [Thu, 14 Apr 2016 17:18:36 +0000 (10:18 -0700)]
drm/dp/mst: Enhance DP MST debugfs output

Add some additional information (input vs. output port, sink associated
with VC, peer device type, max number of VCs supported) and ensure that
any embedded '\0' characters in a branch device's devid string are not
written to debugfs.

v2: Rebase + change drm_edid_get_monitor_name() call to reflect new
    signature.

v3: Minor changes suggested by Jani + rebase.

v4: Rebase

cc: dri-devel@lists.freedesktop.org
cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460654317-31288-2-git-send-email-jim.bride@linux.intel.com
8 years agodrm/edid: Add drm_edid_get_monitor_name()
Jim Bride [Thu, 14 Apr 2016 17:18:35 +0000 (10:18 -0700)]
drm/edid: Add drm_edid_get_monitor_name()

In order to include monitor name information in debugfs
output we needed to add a function that would extract the
monitor name from the EDID, and that function needed to
reside in the file  where the rest of the EDID helper
functions are implemented.

v2: Refactor to have drm_edid_get_monitor_name() and drm_edid_to_eld()
    use a common helper function to extract the monitor name from the
    edid. [Jani] + rebase.

v3: Minor changes suggested by Jani + rebase.

v4: Few more minor changes suggested by Jani + rebase.

cc: dri-devel@lists.freedesktop.org
cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460654317-31288-1-git-send-email-jim.bride@linux.intel.com
8 years agoinclude/drm: Reword debug categories comment.
Robert Foss [Thu, 14 Apr 2016 14:34:16 +0000 (10:34 -0400)]
include/drm: Reword debug categories comment.

The debug category comment mentions 4 categories, but
more than 4 categories are listed. Let's change the
wording to something a bit more generic.

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460644456-9752-1-git-send-email-robert.foss@collabora.com
8 years agodrm: atmel-hlcdc: route DMA accesses through AHB interfaces
Boris Brezillon [Tue, 15 Mar 2016 17:01:08 +0000 (18:01 +0100)]
drm: atmel-hlcdc: route DMA accesses through AHB interfaces

In relation with the actuall bandwidth consumed on a DMA Source interface,
choose the less used one for a created plane.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
8 years agodrm: atmel-hlcdc: check display mode validity in crtc->mode_fixup()
Boris Brezillon [Tue, 5 Jan 2016 17:27:49 +0000 (18:27 +0100)]
drm: atmel-hlcdc: check display mode validity in crtc->mode_fixup()

Move the adjusted display mode check into ->mode_fixup().

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
8 years agodrm: atmel-hlcdc: rework the output code to support drm bridges
Boris Brezillon [Wed, 6 Jan 2016 09:16:32 +0000 (10:16 +0100)]
drm: atmel-hlcdc: rework the output code to support drm bridges

The current output code only supports connection to drm panels.
First simplify the drm panel code, and then add support for external drm
bridges.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
8 years agodrm: atmel-hlcdc: move output mode selection in CRTC implementation
Boris Brezillon [Wed, 6 Jan 2016 10:14:15 +0000 (11:14 +0100)]
drm: atmel-hlcdc: move output mode selection in CRTC implementation

In order to support multiple outputs we need to move the output mode
selection to the CRTC object, so that the output validity check can be
done against the drm_atomic_state.

If the connectors selected by a specific mode setting are requiring
incompatible bus format the atomic operation is aborted (->atomic_check()
returns -EINVAL).

In order to implement that, we need to define our own CRTC state and
overload default ->reset(), ->atomic_duplicate_state() and
->atomic_destroy_state() functions.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
8 years agodrm: atmel-hlcdc: support extended timing ranges on sama5d4 and sama5d2
Boris Brezillon [Tue, 5 Jan 2016 17:11:39 +0000 (18:11 +0100)]
drm: atmel-hlcdc: support extended timing ranges on sama5d4 and sama5d2

The display timings on old SoCs older than the sama5d4 are quite limited
and prevent the use of many displays. Add support for extended timing
ranges on sama5d2 and sama5d4.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
8 years agodrm: atmel-hlcdc: remove leftovers from atomic mode setting migration
Boris Brezillon [Mon, 4 Jan 2016 13:53:35 +0000 (14:53 +0100)]
drm: atmel-hlcdc: remove leftovers from atomic mode setting migration

The ->dpms field is no longer used and can be removed.
The same goes for the dummy ->mode_fixup() implementation which always
returns true.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
8 years agodrm: atmel-hlcdc: fix connector and encoder types
Boris Brezillon [Thu, 31 Dec 2015 17:24:09 +0000 (18:24 +0100)]
drm: atmel-hlcdc: fix connector and encoder types

The hlcdc IP keep the pixel stream in raw RGB mode, and does not provide
any specific connector. Since DRM_MODE_CONNECTOR_RAW_RGB does not exist,
use DRM_MODE_CONNECTOR_Unknown.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
8 years agodrm: atmel-hlcdc: support asynchronous atomic commit operations
Boris Brezillon [Sat, 10 Oct 2015 06:22:09 +0000 (08:22 +0200)]
drm: atmel-hlcdc: support asynchronous atomic commit operations

drm_atomic_helper_commit() does not support asynchronous commits.
Replace it by a specific commit function supporting these kind of requests.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
8 years agodrm: atmel-hlcdc: add a ->cleanup_fb() operation
Boris Brezillon [Sat, 10 Oct 2015 05:55:39 +0000 (07:55 +0200)]
drm: atmel-hlcdc: add a ->cleanup_fb() operation

Add a ->cleanup_fb() operation to avoid memory leaks when the atomic
operation is interrupted after the ->prepare_fb() call.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Fixes 2389fc1 ("drm: atmel-hlcdc: Atomic mode-setting conversion")
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
8 years agodrm/crtc_helper: Reset empty plane state in drm_helper_crtc_mode_set_base()
Liu Ying [Tue, 5 Apr 2016 08:50:39 +0000 (16:50 +0800)]
drm/crtc_helper: Reset empty plane state in drm_helper_crtc_mode_set_base()

Transitional drivers might access the NULL pointer plane->state in
drm_helper_crtc_mode_set_base(), which causes NULL pointer dereference.
So, let's reset it before handing it over to those drivers.
commit e4f31ad2b713 ("drm: reset empty state in transitional helpers")
did the same thing for other transitional helpers, but it seems this one
was missed.

Signed-off-by: Liu Ying <gnuiyl@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1459846239-8946-1-git-send-email-gnuiyl@gmail.com
8 years agoMerge branch 'gma500-next' of git://github.com/patjak/drm-gma500 into drm-next
Dave Airlie [Thu, 14 Apr 2016 03:07:12 +0000 (13:07 +1000)]
Merge branch 'gma500-next' of git://github.com/patjak/drm-gma500 into drm-next

A few fixes and cleanups for 4.7 that's been collecting dust in my
inbox for a while.

* 'gma500-next' of git://github.com/patjak/drm-gma500:
  drm/gma500/mdfld_dsi: remove bogus if check
  drm/gma500: Fix possible out of bounds read
  drm/gma500: fix double freeing

8 years agodrm/virtio: Drop dummy gamma table support
Daniel Vetter [Wed, 30 Mar 2016 09:51:22 +0000 (11:51 +0200)]
drm/virtio: Drop dummy gamma table support

No need to confuse userspace like this.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459331485-28376-8-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/bochs: Drop fake gamma support
Daniel Vetter [Wed, 30 Mar 2016 09:51:19 +0000 (11:51 +0200)]
drm/bochs: Drop fake gamma support

Only really needed for fbdev emulation at 8bpp. And bochs doesn't do
that. And either way bochs only does 32bit rgb, so this is all pretty
much wasted dead code.

The only consideration is that we need to not set up any gamma size
either.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459331485-28376-5-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/core: Fix ordering in drm_mode_config_cleanup.
Maarten Lankhorst [Tue, 22 Mar 2016 14:42:14 +0000 (15:42 +0100)]
drm/core: Fix ordering in drm_mode_config_cleanup.

__drm_atomic_helper_plane_destroy_state calls
drm_framebuffer_unreference, which means that if drm_framebuffer_free
is called before plane->destroy freed memory will be accessed.

A similar case happens for the blob list, which was freed before the
crtc state was, resulting in the unreference_blob from crtc_destroy_state
pointing to garbage memory causing another opportunity for a GPF.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1458657734-21866-1-git-send-email-maarten.lankhorst@linux.intel.com
8 years agodrm/i915: Update DRIVER_DATE to 20160411
Daniel Vetter [Mon, 11 Apr 2016 18:20:18 +0000 (20:20 +0200)]
drm/i915: Update DRIVER_DATE to 20160411

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agoMerge tag 'v4.6-rc3' into drm-intel-next-queued
Daniel Vetter [Mon, 11 Apr 2016 17:21:06 +0000 (19:21 +0200)]
Merge tag 'v4.6-rc3' into drm-intel-next-queued

Linux 4.6-rc3

Backmerge requested by Chris Wilson to make his patches apply cleanly.
Tiny conflict in vmalloc.c with the (properly acked and all) patch in
drm-intel-next:

commit 4da56b99d99e5a7df2b7f11e87bfea935f909732
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Mon Apr 4 14:46:42 2016 +0100

    mm/vmap: Add a notifier for when we run out of vmap address space

and Linus' tree.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/i915: Avoid allocating a vmap arena for a single page
Chris Wilson [Fri, 8 Apr 2016 11:11:14 +0000 (12:11 +0100)]
drm/i915: Avoid allocating a vmap arena for a single page

If we want a contiguous mapping of a single page sized object, we can
forgo using vmap() and just use a regular kmap(). Note that this is only
suitable if the desired pgprot_t is compatible.

v2: Use is_vmalloc_addr()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Dave Gordon <david.s.gordon@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460113874-17366-7-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
8 years agodrm,i915: Introduce drm_malloc_gfp()
Chris Wilson [Fri, 8 Apr 2016 11:11:13 +0000 (12:11 +0100)]
drm,i915: Introduce drm_malloc_gfp()

I have instances where I want to use drm_malloc_ab() but with a custom
gfp mask. And with those, where I want a temporary allocation, I want to
try a high-order kmalloc() before using a vmalloc().

So refactor my usage into drm_malloc_gfp().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: dri-devel@lists.freedesktop.org
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Dave Airlie <airlied@redhat.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460113874-17366-6-git-send-email-chris@chris-wilson.co.uk
8 years agodrm/i915/shrinker: Restrict vmap purge to objects with vmaps
Chris Wilson [Fri, 8 Apr 2016 11:11:12 +0000 (12:11 +0100)]
drm/i915/shrinker: Restrict vmap purge to objects with vmaps

When called because we have run out of vmap address space, we only need
to recover objects that have vmappings and not all.

v2: Start using is_vmalloc_addr()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460113874-17366-5-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
8 years agodrm/i915: Refactor duplicate object vmap functions
Chris Wilson [Fri, 8 Apr 2016 11:11:11 +0000 (12:11 +0100)]
drm/i915: Refactor duplicate object vmap functions

We now have two implementations for vmapping a whole object, one for
dma-buf and one for the ringbuffer. If we couple the mapping into the
obj->pages lifetime, then we can reuse an obj->mapping for both and at
the same time couple it into the shrinker. There is a third vmapping
routine in the cmdparser that maps only a range within the object, for
the time being that is left alone, but will eventually use these routines
in order to cache the mapping between invocations.

v2: Mark the failable kmalloc() as __GFP_NOWARN (vsyrjala)
v3: Call unpin_vmap from the right dmabuf unmapper

v4: Rename vmap to map as we don't wish to imply the type of mapping
involved, just that it contiguously maps the object into kernel space.
Add kerneldoc and lockdep annotations

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Dave Gordon <david.s.gordon@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460113874-17366-4-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
8 years agodrm/i915: Consolidate common error handling in intel_pin_and_map_ringbuffer_obj
Chris Wilson [Fri, 8 Apr 2016 11:11:10 +0000 (12:11 +0100)]
drm/i915: Consolidate common error handling in intel_pin_and_map_ringbuffer_obj

After we pin the ringbuffer into the GGTT, all error paths need to unpin
it again. Move this common step into one block, and make the unable to
iomap error code consistent (i.e. treat it as out of memory to avoid
confusing it with a invalid argument).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460113874-17366-3-git-send-email-chris@chris-wilson.co.uk
8 years agodrm/i915/dmabuf: Tighten struct_mutex for unmap_dma_buf
Chris Wilson [Fri, 8 Apr 2016 11:11:09 +0000 (12:11 +0100)]
drm/i915/dmabuf: Tighten struct_mutex for unmap_dma_buf

We only need the struct_mutex to manipulate the pages_pin_count on the
object, we do not need to hold our BKL when freeing the exported
scatterlist.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460113874-17366-2-git-send-email-chris@chris-wilson.co.uk
8 years agodrm/i915: implement WaClearTdlStateAckDirtyBits
Tim Gore [Mon, 21 Mar 2016 14:37:29 +0000 (14:37 +0000)]
drm/i915: implement WaClearTdlStateAckDirtyBits

This is to fix a GPU hang seen with mid thread pre-emption
and pooled EUs.

v2. Use IS_BXT_REVID instead of IS_BROXTON and INTEL_REVID

v3. And use correct type for register addresses

Signed-off-by: Tim Gore <tim.gore@intel.com>
Reviewed-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458571049-854-1-git-send-email-tim.gore@intel.com
8 years agodrm/i915/bxt: Reversed polarity of PORT_PLL_REF_SEL bit
Dongwon Kim [Thu, 17 Mar 2016 01:06:13 +0000 (18:06 -0700)]
drm/i915/bxt: Reversed polarity of PORT_PLL_REF_SEL bit

For BXT, description of polarities of PORT_PLL_REF_SEL
has been reversed for newer Gen9LP steppings according to the
recent update in Bspec. This bit now should be set for
"Non-SSC" mode for all Gen9LP starting from B0 stepping.

v2: Only B0 and newer stepping should be affected by this
change.

Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94866
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458176773-26925-1-git-send-email-dongwon.kim@intel.com
8 years agodrm/i915: Rename hw state checker to hw state verifier.
Maarten Lankhorst [Wed, 30 Mar 2016 08:00:05 +0000 (10:00 +0200)]
drm/i915: Rename hw state checker to hw state verifier.

Check functions are used by atomic to see if the new state will
be allowed. There's also a hw state checker which checks afterwards
that the committed state is correct. Rename it to hw state verifier
to reduce some confusion.

Suggested-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/56FB8785.8020506@linux.intel.com
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
8 years agodrm/i915: Move modeset state verifier calls.
Maarten Lankhorst [Wed, 23 Mar 2016 13:58:07 +0000 (14:58 +0100)]
drm/i915: Move modeset state verifier calls.

The modeset state verifier no longer has full access to the hardware,
instead it should only verify affected crtc's.

Looking for disabled stuff can be verified immediately after all crtc
disables have completed, while each enabled crtc can be verified right
after being enabled.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458741487-23801-3-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
[mlankhorst: check -> verify]

8 years agodrm/i915: Make modeset state verifier take crtc as argument.
Maarten Lankhorst [Wed, 23 Mar 2016 13:58:06 +0000 (14:58 +0100)]
drm/i915: Make modeset state verifier take crtc as argument.

This will make it easier to keep the crtc checker when atomic
commit is reworked for asynchronous commits. This prevents checking
crtc's that were not part of the state. It's safe to verify disabled
encoders, connectors and dpll's that are not part of the state,
because during modeset connection_mutex is held.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458741487-23801-2-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
[mlankhorst: Extend commit message and rename check to verify.]

8 years agoLinux 4.6-rc3
Linus Torvalds [Mon, 11 Apr 2016 00:58:30 +0000 (17:58 -0700)]
Linux 4.6-rc3

8 years agoMerge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Linus Torvalds [Mon, 11 Apr 2016 00:48:17 +0000 (17:48 -0700)]
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "A couple of small fixes, and wiring up the new syscalls which appeared
  during the merge window"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8550/1: protect idiv patching against undefined gcc behavior
  ARM: wire up preadv2 and pwritev2 syscalls
  ARM: SMP enable of cache maintanence broadcast

8 years agoMerge tag 'mmc-v4.6-rc1' of git://git.linaro.org/people/ulf.hansson/mmc
Linus Torvalds [Mon, 11 Apr 2016 00:38:55 +0000 (17:38 -0700)]
Merge tag 'mmc-v4.6-rc1' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC fixes from Ulf Hansson:
 "Here are a couple of mmc fixes intended for v4.6 rc3:

  MMC host:
   - sdhci: Fix regression setting power on Trats2 board
   - sdhci-pci: Add support and PCI IDs for more Broxton host controllers"

* tag 'mmc-v4.6-rc1' of git://git.linaro.org/people/ulf.hansson/mmc:
  mmc: sdhci-pci: Add support and PCI IDs for more Broxton host controllers
  mmc: sdhci: Fix regression setting power on Trats2 board

8 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Mon, 11 Apr 2016 00:04:42 +0000 (17:04 -0700)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Some bugfixes from I2C:

   - fix a uevent triggered boot problem by removing a useless debug
     print

   - fix sysfs-attributes of the new i2c-demux-pinctrl driver to follow
     standard kernel behaviour

   - fix a potential division-by-zero error (needed two takes)"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: jz4780: really prevent potential division by zero
  Revert "i2c: jz4780: prevent potential division by zero"
  i2c: jz4780: prevent potential division by zero
  i2c: mux: demux-pinctrl: Update docs to new sysfs-attributes
  i2c: mux: demux-pinctrl: Clean up sysfs attributes
  i2c: prevent endless uevent loop with CONFIG_I2C_DEBUG_CORE

8 years agoRevert "ext4: allow readdir()'s of large empty directories to be interrupted"
Linus Torvalds [Sun, 10 Apr 2016 23:52:24 +0000 (16:52 -0700)]
Revert "ext4: allow readdir()'s of large empty directories to be interrupted"

This reverts commit 1028b55bafb7611dda1d8fed2aeca16a436b7dff.

It's broken: it makes ext4 return an error at an invalid point, causing
the readdir wrappers to write the the position of the last successful
directory entry into the position field, which means that the next
readdir will now return that last successful entry _again_.

You can only return fatal errors (that terminate the readdir directory
walk) from within the filesystem readdir functions, the "normal" errors
(that happen when the readdir buffer fills up, for example) happen in
the iterorator where we know the position of the actual failing entry.

I do have a very different patch that does the "signal_pending()"
handling inside the iterator function where it is allowable, but while
that one passes all the sanity checks, I screwed up something like four
times while emailing it out, so I'm not going to commit it today.

So my track record is not good enough, and the stars will have to align
better before that one gets committed.  And it would be good to get some
review too, of course, since celestial alignments are always an iffy
debugging model.

IOW, let's just revert the commit that caused the problem for now.

Reported-by: Greg Thelen <gthelen@google.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'parisc-4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Sat, 9 Apr 2016 21:10:20 +0000 (14:10 -0700)]
Merge branch 'parisc-4.6-3' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:
 "Since commit 0de798584bde ("parisc: Use generic extable search and
  sort routines") module loading is boken on parisc, because the parisc
  module loader wasn't prepared for the new R_PARISC_PCREL32 relocations.

  In addition, due to that breakage, Mikulas Patocka noticed that
  handling exceptions from modules probably never worked on parisc.  It
  was just masked by the fact that exceptions from modules don't happen
  during normal use.

  This patch series fixes those issues and survives the tests of the
  lib/test_user_copy kernel module test.  Some patches are tagged for
  stable"

* 'parisc-4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Update comment regarding relative extable support
  parisc: Unbreak handling exceptions from kernel modules
  parisc: Fix kernel crash with reversed copy_from_user()
  parisc: Avoid function pointers for kernel exception routines
  parisc: Handle R_PARISC_PCREL32 relocations in kernel modules

8 years agoMerge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...
Linus Torvalds [Sat, 9 Apr 2016 21:05:45 +0000 (14:05 -0700)]
Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:
 "Three fixes, the first two are tagged for -stable:

   - The ndctl utility/library gained expanded unit tests illuminating a
     long standing bug in the libnvdimm SMART data retrieval
     implementation.

     It has been broken since its initial implementation, now fixed.

   - Another one line fix for the detection of stale info blocks.

     Without this change userspace can get into a situation where it is
     unable to reconfigure a namespace.

   - Fix the badblock initialization path in the presence of the new (in
     v4.6-rc1) section alignment workarounds.

     Without this change badblocks will be reported at the wrong offset.

  These have received a build success report from the kbuild robot and
  have appeared in -next with no reported issues"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm, pfn: fix nvdimm_namespace_add_poison() vs section alignment
  libnvdimm, pfn: fix uuid validation
  libnvdimm: fix smart data retrieval

8 years agoMerge tag 'gpio-v4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Sat, 9 Apr 2016 20:28:50 +0000 (13:28 -0700)]
Merge tag 'gpio-v4.6-3' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Here is a set of four GPIO fixes.  The two fixes to the core are
  serious as they are regressing minor architectures.

  Core fixes:

   - Defer GPIO device setup until after gpiolib is initialized.

     It turns out that a few very tightly integrated GPIO platform
     drivers initialize so early (befor core_initcall()) so that the
     gpiolib isn't even initialized itself.  That limits what the
     library can do, and we cannot reference uninitialized fields until
     later.

     Defer some of the initialization until right after the gpiolib is
     initialized in these (rare) cases.

   - As a consequence: do not use devm_* resources when allocating the
     states in the initial set-up of the gpiochip.

  Driver fixes:

   - In ACPI retrieveal: ignore GpioInt when looking for output GPIOs.

   - Fix legacy builds on the PXA without a backing pin controller.

   - Use correct datatype on pca953x register writes"

* tag 'gpio-v4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: pca953x: Use correct u16 value for register word write
  gpiolib: Defer gpio device setup until after gpiolib initialization
  gpiolib: Do not use devm functions when registering gpio chip
  gpio: pxa: fix legacy non pinctrl aware builds
  gpio / ACPI: ignore GpioInt() GPIOs when requesting GPIO_OUT_*

8 years agoMerge tag 'tty-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Sat, 9 Apr 2016 19:32:44 +0000 (12:32 -0700)]
Merge tag 'tty-4.6-rc3' of git://git./linux/kernel/git/gregkh/tty

Pull tty fixes from Greg KH:
 "Here are two tty fixes for issues found.

  One was due to a merge error in 4.6-rc1, and the other a regression
  fix for UML consoles that broke in 4.6-rc1.

  Both have been in linux-next for a while"

* tag 'tty-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: Fix merge of "tty: Refactor tty_open()"
  tty: Fix UML console breakage

8 years agoMerge tag 'usb-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sat, 9 Apr 2016 19:23:02 +0000 (12:23 -0700)]
Merge tag 'usb-4.6-rc3' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some USB fixes and new device ids for 4.6-rc3.

  Nothing major, the normal USB gadget fixes and usb-serial driver ids,
  along with some other fixes mixed in.  All except the USB serial ids
  have been tested in linux-next, the id additions should be fine as
  they are 'trivial'"

* tag 'usb-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (25 commits)
  USB: option: add "D-Link DWM-221 B1" device id
  USB: serial: cp210x: Adding GE Healthcare Device ID
  USB: serial: ftdi_sio: Add support for ICP DAS I-756xU devices
  usb: dwc3: keystone: drop dma_mask configuration
  usb: gadget: udc-core: remove manual dma configuration
  usb: dwc3: pci: add ID for one more Intel Broxton platform
  usb: renesas_usbhs: fix to avoid using a disabled ep in usbhsg_queue_done()
  usb: dwc2: do not override forced dr_mode in gadget setup
  usb: gadget: f_midi: unlock on error
  USB: digi_acceleport: do sanity checking for the number of ports
  USB: cypress_m8: add endpoint sanity check
  USB: mct_u232: add sanity checking in probe
  usb: fix regression in SuperSpeed endpoint descriptor parsing
  USB: usbip: fix potential out-of-bounds write
  usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer
  usb: renesas_usbhs: avoid NULL pointer derefernce in usbhsf_pkt_handler()
  usb: gadget: f_midi: Fixed a bug when buflen was smaller than wMaxPacketSize
  usb: phy: qcom-8x16: fix regulator API abuse
  usb: ch9: Fix SSP Device Cap wFunctionalitySupport type
  usb: gadget: composite: Access SSP Dev Cap fields properly
  ...