As suggested by Daniel Vetter, this is a safeguard should any of the
registers cause reference to PTE entries.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

So we can remove the repeated initialisation.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

As we provide a list of all objects that will be accessed from the
batchbuffer, we can build a lut of the handles associated with those
objects for this invocation and use that to avoid the overhead of
looking up those objects again for every relocation.

The cost of building and searching a small hash table is much less than
that of acquiring a spinlock, searching a radix tree and manipulating an
atomic refcnt per relocation.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Don't post a downclocking task if the device is still active when the
idle timer fires. A pathological process could queue up several seconds
worth of processing and then go to sleep, during which time the idle
timer would kick in and downclock the GPU.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

... still causes a failure during suspend.
Reported-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Conflicts:
	drivers/gpu/drm/i915/i915_gem.c
	drivers/gpu/drm/i915/intel_dp.c

As we may try to power down the link at various times, it is not
necessarily still coupled with an encoder and so we must be careful not
to depend upon an operation that is only valid when the link is still
attached to a pipe.

Fixes regression in 5bddd17f.
Reported-and-tested-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org [after applying 5bddd17f]

In order for bos to retire eventually, a request must be sent down the
ring. This is expected, for example, by occlusion queries for which mesa
will wait upon (whilst running glean) before issuing more batches and so
the normal activity upon the ring is suspended and we need to emit a
request to clear the idle ring.
Reported-by: NJinjin, Wang <jinjin.wang@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=30380Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

I'm still seeing tiling corruption of PutImage and CopyArea (I think)
under mutter on pnv, so obviously the pipelining logic is deeply flawed.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Userspace should not have been declaring that it needed fenced GPU
access with gen4+ as those GPUs have no fenced commands, but to be on
the safe side it is easier to ignore userspace in case they did.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

The ability to save the hardware context upon powering down the render
clock through PWRCTXA is only available on a couple of gen4 chipsets.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

The workaround is hideous and we are using the STORE_DWORD on all other
generations on all other rings, so use for the gen5 render ring as
well.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Linus Torvalds pointed out that our code was unbalanced when powering on
the panel with respect to the power off sequence in that we were failing
to restore the panel-fitter. The consequence of this would be that
across a simple DPMS off/on for a non-native mode, without an intervening
modeset, the panel fitter would remain disabled and the output would shift
on the panel.
Reported-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

There's not much we can do here but hope for the best. However the first
failure happens quite frequently and if often remedied by the second
attempt to reset HEAD. So only print the error if that attempt also
fails.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=19802Reported-by: NThomas Meyer <thomas@m3y3r.de>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org

Locally scope the crtc to where it is used.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Immediate merge for the conflicting introduction of HAS_COHERENT_RINGS.

Conflicts:
	drivers/gpu/drm/i915/i915_dma.c
	include/drm/i915_drm.h

Otherwise we can't really fix the abi-braindeadness of forcing
libva to manually wait for rendering when switching rings. Which
in turn makes implementing hw semaphores a pointless exercise
(at least for ironlake).

[Also added the relaxed fencing param to explain the jump in
numbering - relaxed fencing is in -next.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Add a missing NULL check and fix the wrong address passed to kunmap()
in i830_cleanup().

Cc: stable@kernel.org
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
[danvet: added cc stable]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

We disabled this a while ago as it was inexplicably broken. However, it
now appears to work...
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

The bulk of the change is to convert the growing list of rings into an
array so that the relationship between the rings and the semaphore sync
registers can be easily computed.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

This will declare the machine wedged, but is better than truly wedging
the machine.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Previously we enabled this for gen4, only to have to revert it due to it
causing a large number of spurious wakeups. Try again hoping that the
hardware has become more sane in the mean time...
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Let's see if we've successfully cleared up all the bugs from last
time...
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Magic numbers from the specs. This is supposed to allow the PLL some
variance to improve jitter performance and VCO headroom across
manufacturing and environmental variations.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

... it's because setting the Pixel Multiply bits only takes effect once
the PLL is enabled and stable.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

... and do not just assume to always use pipe B.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Fixes the modesetting on the secondary panel of the Libretto W100 and
presumably many more Ironlake laptops with SDVO LVDS displays.
Reported-and-tested-by: NMatthew Willoughby <mattfredwill@gmail.com>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org

Use the hardware DDA to calculate the ratio with as much accuracy as is
possible.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org

If we leave the registers in a conflicting state then when we attempt
to teardown the active mode, we will not disable the pipes and planes
in the correct order -- leaving a plane reading from a disabled pipe and
possibly leading to undefined behaviour.
Reported-and-tested-by: NAndy Whitcroft <apw@canonical.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=32078Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org

Conflicts:
	drivers/gpu/drm/i915/intel_drv.h

This workaround only applies to Ironlake.
Signed-off-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org

The pipe is always set to 8BPC, but here we were leaving whatever
previous bits were set by the BIOS in place.
Signed-off-by: NEric Anholt <eric@anholt.net>
Tested-by: NKeith Packard <keithp@keithp.com>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org

* 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (27 commits)
  Staging: rt2870: Add USB ID for Buffalo Airstation WLI-UC-GN
  staging: easycap needs smp_lock.h, fixes build error
  Staging: batman-adv: ensure that eth_type_trans gets linear memory
  Staging: batman-adv: Don't remove interface with spinlock held
  staging: brcm80211: updated maintainers contact information
  staging: fix winbond build, needs delay.h
  Staging: line6: fix up my fixup for some sysfs attribute permissions
  Staging: zram: fix up my fixup for some sysfs attribute permissions
  Staging: udlfb: fix up my fixup for some sysfs attribute permissions
  Staging: samsung-laptop: fix up my fixup for some sysfs attribute permissions
  Staging: iio: adis16220: fix up my fixup for some sysfs attribute permissions
  Staging: frontier: fix up my fixup for some sysfs attribute permissions
  Staging: asus_oled: fix up my fixup for some sysfs attribute permissions
  staging: spectra: fix build error
  Staging: intel_sst: fix memory leak
  Staging: rtl8712: signedness bug in init
  staging: rtl8187se: Change panic to warn when RF switch turned off
  staging: comedi: fix memory leak
  Staging: quickstart: free after input_unregister_device()
  Staging: speakup: free after input_unregister_device()
  ...

Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6

* 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  uio: Change mail address of Hans J. Koch
  driver core: prune docs about device_interface
  driver core: the development tree has switched to git