platform/kernel/linux-amlogic.git
11 years agodrm/i915: drop DPFLIPSTAT enables on VLV v3
Jesse Barnes [Tue, 2 Apr 2013 18:25:32 +0000 (11:25 -0700)]
drm/i915: drop DPFLIPSTAT enables on VLV v3

We don't need this until we start using the wait event commands.

v2: move to i915_irq.c (Jesse)
    drop unneeded sprite flip done enables (Ville)
v3: drop the DPFLIPSTAT enables altogether (Ville)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add Punit read/write routines for VLV v2
Jesse Barnes [Tue, 2 Apr 2013 18:23:05 +0000 (11:23 -0700)]
drm/i915: add Punit read/write routines for VLV v2

Slightly different than other platforms.

v2 [Jani]: Fix IOSF_BYTE_ENABLES_SHIFT shift. Use common routine.
v3: drop turbo defines from this patch (Ville)
    use PCI_DEVFN(2,0) instead of open coding (Ville)

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
[danvet: Add checkpatch bikeshed about missing space.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: panel power sequencing for VLV eDP v2
Jesse Barnes [Thu, 28 Mar 2013 16:55:41 +0000 (09:55 -0700)]
drm/i915: panel power sequencing for VLV eDP v2

PPS register offsets have changed in Valleyview.

v2: don't clobber port select bits on VLV when fixing up PPS timings
    don't bother with G4x PPS regs (Jani)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Gajanan Bhat <gajanan.bhat@intel.com>
Signed-off-by: Vijay Purushothaman <vijay.a.purushothaman@intel.com>
Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/dp: fix up VLV DP handling v2
Jesse Barnes [Thu, 28 Mar 2013 16:55:40 +0000 (09:55 -0700)]
drm/i915/dp: fix up VLV DP handling v2

Needed to handle pre/post enable/disable paths on VLV and avoid a few
fields that are marked reserved on VLV.

v2: don't set color range or DP PLL fields (Jani)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add sprite assertion function for VLV
Jesse Barnes [Thu, 28 Mar 2013 16:55:38 +0000 (09:55 -0700)]
drm/i915: add sprite assertion function for VLV

Need to make sure sprites are disabled before shutting off a pipe.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: sprite support for ValleyView v4
Jesse Barnes [Tue, 2 Apr 2013 18:22:20 +0000 (11:22 -0700)]
drm/i915: sprite support for ValleyView v4

No constant alpha yet though, that needs a new ioctl and/or property to
get/set.

v2: use drm_plane_format_cpp (Ville)
    fix up vlv_disable_plane, remove IVB bits (Ville)
    remove error path rework (Ville)
    fix component order confusion (Ville)
    clean up platform init (Ville)
    use compute_offset_xtiled (Ville)
v3: fix up more format confusion (Ville)
    update to new page offset function (Ville)
v4: remove incorrect formats from framebuffer_init (Ville)

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: fix DDI get_hw_state return value
Jesse Barnes [Tue, 2 Apr 2013 17:03:55 +0000 (10:03 -0700)]
drm/i915: fix DDI get_hw_state return value

If we couldn't find a pipe we shouldn't return true.  This might be even
better as a WARN though, since it should be impossible to have the port
enabled without a pipe selected.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: fix DP get_hw_state return value
Jesse Barnes [Tue, 2 Apr 2013 17:03:56 +0000 (10:03 -0700)]
drm/i915: fix DP get_hw_state return value

If we couldn't find a pipe we shouldn't return true.  This might be even
better as a WARN though, since it should be impossible to have the port
enabled without a pipe selected.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Skip modifying PCH DREF if not changing clock sources
Chris Wilson [Tue, 26 Mar 2013 23:33:04 +0000 (16:33 -0700)]
drm/i915: Skip modifying PCH DREF if not changing clock sources

Modifying the clock sources (via the DREF control on the PCH) is a slow
multi-stage process as we need to let the clocks stabilise between each
stage. If we are not actually changing the clock sources, then we can
return early.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
[danvet: Appease checkpatch by deleting a space after a ~]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: group backlight related stuff into a struct
Jani Nikula [Tue, 2 Apr 2013 12:48:09 +0000 (15:48 +0300)]
drm/i915: group backlight related stuff into a struct

No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: fix ILK GPU reset for render
Jesse Barnes [Thu, 28 Mar 2013 20:57:19 +0000 (13:57 -0700)]
drm/i915: fix ILK GPU reset for render

Earlier code would leave both bits set, so any reset after the first
would only reset media.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: fixup fb bpp computation in pipe_config_set_bpp
Daniel Vetter [Thu, 28 Mar 2013 15:38:08 +0000 (16:38 +0100)]
drm/i915: fixup fb bpp computation in pipe_config_set_bpp

Ville pointed out that my assumption that no unsupported pixel format
can get past the pipe config computation stage to the platform
update_plane callbacks is wrong. The reason is that this function
still checks the old fb->depth value instead of the new pixel_format.

While checking with all the other places that use this I've noticed
that intel_framebuffer_init already has all the platform checks we
need, so replace those checks with a WARN_ON.

Since fb->depth isn't set for YUV pixel formats and since we already
can't create an fb with an rgb layout not support on the running
platform I /think/ this patch doesn't fix any bug.

But it surely looks better!

v2: BGR formats are also only gen4+, so add the corresponding WARN_ON,
too (Ville).

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: check fb->pixel_format instead of bits_per_pixel
Daniel Vetter [Thu, 28 Mar 2013 15:01:35 +0000 (16:01 +0100)]
drm/i915: check fb->pixel_format instead of bits_per_pixel

We've mostly switched over to the new more flexible schema, but
there's one check left in the modeset code.

Motivated by a question from Ville whether there's really no way an
unsupported pixel_format can escape into our platform update_plane
callbacks.

v2: Ville noticed that the fb->depth check is redudant when we already
check fb->pixel_format.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: fix up _wait_for macro
Daniel Vetter [Wed, 27 Mar 2013 23:03:25 +0000 (00:03 +0100)]
drm/i915: fix up _wait_for macro

As Thomas Gleixner spotted, it's rather horrible racy:
- We can miss almost a full tick, so need to compensate by 1 jiffy.
- We need to re-check the condition when having timed-out, since a
  the last check could have been before the timeout expired. E.g. when
  we've been preempted or a long irq happened.

Cc: Thomas Gleixner <tglx@linutronix.de>
Reported-by: Jack Winter <jbh@alchemy.lu>
Cc: Jack Winter <jbh@alchemy.lu>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: fold wait_for_atomic_us into wait_for_atomic
Daniel Vetter [Thu, 28 Mar 2013 10:31:04 +0000 (11:31 +0100)]
drm/i915: fold wait_for_atomic_us into wait_for_atomic

Since

commit bcf9dcc1e6269fac674e41f25d007ff75f76e840
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Sun Jul 15 09:42:38 2012 +0100

    drm/i915: Workaround hang with BSD and forcewake on SandyBridge

and

commit 0cc2764cc4a4bd73df55f8893c871778cf7ddd0f
Author: Ben Widawsky <ben@bwidawsk.net>
Date:   Sat Sep 1 22:59:48 2012 -0700

    drm/i915: use cpu_relax() in wait_for_atomic

these two macros are essentially the same, so unify them. We keep the
_us version since it's a nice documentation for smaller timeouts.

v2: Fixup time unit conversion, _wait_for takes ms (Ville).

Cc: Jack Winter <jbh@alchemy.lu>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: remove "inline" keyword from ironlake_disable_display_irq
Paulo Zanoni [Fri, 22 Feb 2013 20:05:31 +0000 (17:05 -0300)]
drm/i915: remove "inline" keyword from ironlake_disable_display_irq

 - It's a static function
 - I just added a few more users to it
 - Its sister ironlake_enable_display_irq is not marked as inline
 - The compiler will still inline if it thinks it should do

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: clean up pipe bpp confusion
Daniel Vetter [Tue, 26 Mar 2013 23:45:01 +0000 (00:45 +0100)]
drm/i915: clean up pipe bpp confusion

- gen4 and earlier (save for g4x) only really have a 8bpc pipe, with
  the possibility to dither to 6bpc using the panel fitter
- g4x has hdmi, but no 12 bpc pipe ... !? Clamp hdmi accordingly.
- TV/SDVO out are the only connectors available on platforms with
  a pipe bpp != 8, add code to force the pipe to 8bpc unconditionally.

<rant>
The dither handling on gmch platforms is one giant disaster. I'm hoping
somewhat that vlv enabling will fix this up, but given that the 6bpc
handling for edp was simply added with another quick hack, I don't have
high hopes ...
</rant>

v2: Neither vlv nor g4x have 12bpc pipes. Still set pipe_bpp to 12*3,
but let the crtc code clamp things down to 10bpc on these platforms.

v3: Fix a bpc vs. bpp mixup in the gen4 and earlier pipe_bpp limiter
code.

v4: Drop the hunk in intel_hdmi.c about g4x/vlv 12bpc, it was wrong.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: clean up plane bpp confusion
Daniel Vetter [Tue, 26 Mar 2013 23:45:00 +0000 (00:45 +0100)]
drm/i915: clean up plane bpp confusion

- There is no 16bpc linear color format in our hw. gen4+ has a 16 bpc
  float layout, but we don't really support it.
- 10bpc is a gen4+ feature, fix up the support for it.
- Update_plane should never see a wrong fb bpp value, BUG in the
  corresponding cases.

v2: Rebase on top of Ville's plane pixel layout changes.

v3: Actually drop the old gen4 check for 10bpc planes, spotted
by Ville Syrjälä.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: convert DP autodither code to new infrastructure
Daniel Vetter [Tue, 26 Mar 2013 23:44:59 +0000 (00:44 +0100)]
drm/i915: convert DP autodither code to new infrastructure

The old code only handled either 6bpc or 8bpc. Since it's easy to do,
reorganize the code to be a bit more generic so that it can also handle
10bpc and 12bpc. Note that we still start with 8bpc, so there's no
functional change.

Also, since we no don't need to compute the 6BPC flag in the mode_valid
callback, we can consolidate things a bit. That requires though that
the link bw computation is moved up in the compute_config callback.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: precompute pipe bpp before touching the hw
Daniel Vetter [Tue, 26 Mar 2013 23:44:58 +0000 (00:44 +0100)]
drm/i915: precompute pipe bpp before touching the hw

The procedure has now 3 steps:

1. Compute the bpp that the plane will output, this is done in
   pipe_config_set_bpp and stored into pipe_config->pipe_bpp. Also,
   this function clamps the pipe_bpp to whatever limit the EDID of any
   connected output specifies.
2. Adjust the pipe_bpp in the encoder and crtc functions, according to
   whatever constraints there are.
3. Decide whether to use dither by comparing the stored plane bpp with
   computed pipe_bpp.

There are a few slight functional changes in this patch:
- LVDS connector are now also going through the EDID clamping. But in
  a 2nd change we now unconditionally force the lvds bpc value - this
  shouldn't matter in reality when the panel setup is consistent, but
  better safe than sorry.
- HDMI now forces the pipe_bpp to the selected value - I think that's
  what we actually want, since otherwise at least the pixelclock
  computations are wrong (I'm not sure whether the port would accept
  e.g. 10 bpc when in 12bpc mode). Contrary to the old code, we pick
  the next higher bpc value, since otherwise there's no way to make
  use of the 12 bpc mode (since the next patch will remove the 12bpc
  plane format, it doesn't exist).

Both of these changes are due to the removal of the

pipe_bpp = min(display_bpp, plane_bpp);

statement.

Another slight change is the reworking of the dp bpc code:
- For the mode_valid callback it's sufficient to only check whether
  the mode would fit at the lowest bpc.
- The bandwidth computation code is a bit restructured: It now walks
  all available bpp values in an outer loop and the codeblock that
  computes derived values (once a good configuration is found) has been
  moved out of the for loop maze. This is prep work to allow us to
  successively fall back on bpc values, and also correctly support bpc
  values != 8 or 6.

v2: Rebased on top of Paulo Zanoni's little refactoring to use more
drm dp helper functions.

v3: Rebased on top of Jani's eDP bpp fix and Ville's limited color
range work.

v4: Remove the INTEL_MODE_DP_FORCE_6BPC #define, no longer needed.

v5: Remove intel_crtc->bpp, too, and fix up the 12bpc check in the
hdmi code. Also fixup the bpp check in intel_dp.c, it'll get reworked
in a later patch though again.

v6: Fix spelling in a comment.

v7: Debug output improvements for the bpp computation.

v8: Fixup 6bpc lvds check - dual-link and 8bpc mode are different
things!

v9: Reinstate the fix to properly ignore the firmware edp bpp ... this
was lost in a rebase.

v10: Both g4x and vlv lack 12bpc pipes, so don't enforce that we have
that. Still unsure whether this is the way to go, but at least 6bpc
for a 8bpc hdmi output seems to work.

v11: And g4x/vlv also lack 12bpc hdmi support, so only support high
depth on DP. Adjust the code.

v12: Rebased.

v13: Split out the introduction of pipe_config->dither|pipe_bpp, as
requested from Jesse Barnes.

v14: Split out the special 6BPC handling for DP, as requested by Jesse
Barnes.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: introduce pipe_config->dither|pipe_bpp
Daniel Vetter [Tue, 26 Mar 2013 23:44:57 +0000 (00:44 +0100)]
drm/i915: introduce pipe_config->dither|pipe_bpp

We want to compute this earlier. To avoid a big complicated patch,
this patch here just does the big search&replace and still calls the
old functions at the same places.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add pipe_config->limited_color_range
Daniel Vetter [Tue, 26 Mar 2013 23:44:56 +0000 (00:44 +0100)]
drm/i915: add pipe_config->limited_color_range

Now that we have a useful struct for this, let's use it. Some neat
pointer-chasing required, but it's all there already.

v2: Rebased on top of the added Haswell limited color range support.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add pipe_config->has_pch_encoder
Daniel Vetter [Tue, 26 Mar 2013 23:44:55 +0000 (00:44 +0100)]
drm/i915: add pipe_config->has_pch_encoder

This is used way too often in the enable/disable paths. And will
be even more useful in the future.

Note that correct semantics of this change highly depend upon
correct updating of intel_crtc->config: Like with all other
modeset state, we need to call ->disable with the old config,
but ->mode_set and ->enable with the new config.

v2: Do not yet use the flag in the ->disable callbacks - atm we don't
yet have support for the information stored in the pipe_config in the
hw state readout code, so this will be wrong at boot-up/resume.

v3: Rebased on top of the hdmi/dp ddi encoder merging.

v4: Fixup stupid rebase error which lead to a NULL vfunc deref.

v5: On haswell the VGA port is on the PCH!

v6: s/IS_HASWELL/HAS_DDI/, spotted by Paulo Zanoni. Also add a missing
parameter name in a function declaration.

v7: Don't forget to git add ...

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: drop helper vtable for sdvo encoder
Daniel Vetter [Tue, 26 Mar 2013 23:44:54 +0000 (00:44 +0100)]
drm/i915: drop helper vtable for sdvo encoder

Completely unused by now. Separate patch in case I've missed a
place somewhere which dereferences the helper vtable but actually
shouldn't do so.

v2: Resolve rebase conflict with Egbert Eich's hpd infrastructure
rework.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add pipe_config->pixel_multiplier
Daniel Vetter [Tue, 26 Mar 2013 23:44:53 +0000 (00:44 +0100)]
drm/i915: add pipe_config->pixel_multiplier

Used by SDVO (and hopefully, eventually HDMI, if we ever get around
to fixing up the low dotclock CEA modes ...).

This required adding a new encoder->mode_set callback to be able to
pass around the intel_crtc_config.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add pipe_config->timings_set
Daniel Vetter [Tue, 26 Mar 2013 23:44:52 +0000 (00:44 +0100)]
drm/i915: add pipe_config->timings_set

Only used by the lvds encoder. Note that we shouldn't do the same
simple conversion with the FORCE_6BPC flag, since that's much better
handled by moving all the pipe_bpc computation around.

This requires that we pass the pipe config around to encoders, so
that they can set special attributes and set constraints. To do so
introduce a new ->compute_config encoder callback, which is called in
stead of the drm crtc helper's ->mode_fixup.

To avoid massive churn all over the codebase we don't want to convert
all existing ->mode_fixup functions. Instead I've opted to convert
them on an as-needed basis (mostly to cut down on rebase conflicts and
to have more freedom to experiment around while developing the
patches).

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: compute pipe_config earlier
Daniel Vetter [Tue, 26 Mar 2013 23:44:51 +0000 (00:44 +0100)]
drm/i915: compute pipe_config earlier

To make decent modeset state checking possible (e.g. for the check
mode with atomic modesetting) we want to have the full pipe
configuration and state checks done before we touch the hw.

To ensure that all the little bits&pieces that are now moved to the
pipe_config handle this correctly, move its computation to the right
spot now, before we touch the hw in the disable_pipes step.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: introduce struct intel_crtc_config
Daniel Vetter [Tue, 26 Mar 2013 23:44:50 +0000 (00:44 +0100)]
drm/i915: introduce struct intel_crtc_config

Currently only containing the requested and the adjusted mode. And
only crtc callbacks are converted somewhat to it, encoders will be
done on a as-needed basis (simply too much churn in one patch
otherwise).

Future patches will add tons more useful stuff to this struct,
starting with the very simple.

v2: Store the pipe_config in the intel_crtc, so that the ->mode-set,
->enable and also ->disable have easy access to it.

v3: Store the pipe config in the right crtc ...

v4: Rebased.

v5: Fixup an OOPS when trying to kfree an ERR_PTR.

v6: Used drm_moode_copy and some other small cleanups as suggested
by Ville Syrjälä.

v7: drm_mode_copy preserves the mode id of the destination, so no need
to clear it again (Ville).

v8: Break a long line spotted by Paulo.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: return actual brightness to .get_brightness callback
Jani Nikula [Tue, 12 Mar 2013 09:44:16 +0000 (11:44 +0200)]
drm/i915: return actual brightness to .get_brightness callback

The backlight device .get_brightness callback is supposed to return the
actual brightness by querying the hardware, not the cached value. See
Documentation/ABI/stable/sysfs-class-backlight. The callback is there to
support the actual_brightness sysfs file.

With the backlight_level and backlight device brightness now in sync, one
can reliably get the cached value through the brightness sysfs file.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: keep backlight_level and backlight device brightness in sync
Jani Nikula [Tue, 12 Mar 2013 09:44:15 +0000 (11:44 +0200)]
drm/i915: keep backlight_level and backlight device brightness in sync

A single point of truth would be better than two, but achieving that would
require more abstractions for CONFIG_BACKLIGHT_CLASS_DEVICE=n with not a
whole lot of real benefits. Take the short route and just keep the
backlight levels in sync. In particular, update backlight device brightness
on opregion brightness changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: wire up SDVO hpd support on cpt/ppt
Daniel Vetter [Tue, 26 Mar 2013 21:38:43 +0000 (22:38 +0100)]
drm/i915: wire up SDVO hpd support on cpt/ppt

Now with Egbert Eich's hpd infrastructure rework merged this is dead
simple. And we need this to make output detection work on SDVO - with
the cleaned-up drm polling helpers outputs which claim to have hpd
support are no longer polled.

Now SDVO claims to do that, but it's not actually wired up. So just do
it.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Wait for vblank between disabling a sprite and unpinning the fb
Ville Syrjälä [Wed, 27 Mar 2013 15:49:13 +0000 (17:49 +0200)]
drm/i915: Wait for vblank between disabling a sprite and unpinning the fb

When disabling a sprite, wait for the sprite to stop fetching data
from memory before unpinning the fb.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: clear crt hotplug compare voltage field before setting
Daniel Vetter [Wed, 27 Mar 2013 14:47:11 +0000 (15:47 +0100)]
drm/i915: clear crt hotplug compare voltage field before setting

Noticed while reviewing the hotplug irq setup code. Just looks better.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoRevert "drm/i915: set dummy page for stolen objects"
Imre Deak [Tue, 26 Mar 2013 13:14:19 +0000 (15:14 +0200)]
Revert "drm/i915: set dummy page for stolen objects"

Since for_each_sg_page supports already memory w/o backing pages we can
revert the corresponding workaround.

This reverts commit 5bd4687e57bbacec20930f580d025aee9fa1f4d8.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agolib/scatterlist: sg_page_iter: support sg lists w/o backing pages
Imre Deak [Tue, 26 Mar 2013 13:14:18 +0000 (15:14 +0200)]
lib/scatterlist: sg_page_iter: support sg lists w/o backing pages

The i915 driver uses sg lists for memory without backing 'struct page'
pages, similarly to other IO memory regions, setting only the DMA
address for these. It does this, so that it can program the HW MMU
tables in a uniform way both for sg lists with and without backing pages.

Without a valid page pointer we can't call nth_page to get the current
page in __sg_page_iter_next, so add a helper that relevant users can
call separately. Also add a helper to get the DMA address of the current
page (idea from Daniel).

Convert all places in i915, to use the new API.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Apply alignment restrictions on scanout surfaces for VT-d
Chris Wilson [Tue, 5 Mar 2013 14:52:39 +0000 (14:52 +0000)]
drm/i915: Apply alignment restrictions on scanout surfaces for VT-d

From the w/a database:

'To prevent false VT-d type 6 error:

  The primary display plane must be 256KiB aligned, and require an extra
  128 PTEs of padding afterward;

  The sprites planes must be 128KiB aligned, and require an extra 64 PTEs
  of padding afterward;

  The cursors must be 64KiB aligned, and require an extra 2 PTEs of
  padding afterward.'

As we use the same function to pin the primary and sprite planes, we can
simply use the more strict requirements for scanouts for both.

Instead of using explicit padding PTEs following the scanout objects, we
should be able to use the scratch page that is always mapped into the
unused PTEs to avoid the VT-d error.

References: https://bugs.freedesktop.org/show_bug.cgi?id=59626
References: https://bugs.freedesktop.org/show_bug.cgi?id=59627
References: https://bugs.freedesktop.org/show_bug.cgi?id=59631
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
[danvet: Apply s/vtd_wa/vtd_scanout_wa/ bikeshed since Damien likes
it, too.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoDRM/i915: Get rid if the 'hotplug_supported_mask' in struct drm_i915_private.
Egbert Eich [Mon, 25 Feb 2013 17:06:52 +0000 (12:06 -0500)]
DRM/i915: Get rid if the 'hotplug_supported_mask' in struct drm_i915_private.

Now since we have replaced the bits to show interest in hotplug IRQs
we can go and nuke the 'hotplug_supported_mask'.

Signed-off-by: Egbert Eich <eich@suse.de>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoDRM/i915: Remove i965_hpd_irq_setup.
Egbert Eich [Mon, 25 Feb 2013 17:06:51 +0000 (12:06 -0500)]
DRM/i915: Remove i965_hpd_irq_setup.

After
"Convert HPD interrupts to make use of HPD pin assignment in encoders."
This function is now basically the same as i915_hpd_irq_setup().

Consolidating both functions in one requires one more check for
I915_HAS_HOTPLUG(dev) in the i965 code path and one more check for
IS_G4X(dev) in the i915 code path. These are considered harmless.

Signed-off-by: Egbert Eich <eich@suse.de>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Fixup patch conflict and make it compile.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: implement ibx_hpd_irq_setup
Daniel Vetter [Wed, 27 Mar 2013 14:55:01 +0000 (15:55 +0100)]
drm/i915: implement ibx_hpd_irq_setup

This fixes a regression introduced in

commit e5868a318d1ae28f760f77bb91ce5deb751733fd
Author: Egbert Eich <eich@suse.de>
Date:   Thu Feb 28 04:17:12 2013 -0500

    DRM/i915: Convert HPD interrupts to make use of HPD pin assignment in encode

Due to the irq setup rework in 3.9, see

commit 20afbda209d708be66944907966486d0c1331cb8
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Dec 11 14:05:07 2012 +0100

    drm/i915: Fixup hpd irq register setup ordering

Egbert Eich's hpd rework blows up on pch-split platforms - it walks
the encoder list before that has been set up completely. The new init
sequence is:

1. irq enabling
2. modeset init
3. hpd setup

We need to move around the ibx setup a bit to fix this.

Ville Syrjälä pointed out in his review that we can't touch SDEIER
after the interrupt handler is set up, since that'll race with Paulo
Zanoni's PCH interrupt race fix:

commit 44498aea293b37af1d463acd9658cdce1ecdf427
Author: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date:   Fri Feb 22 17:05:28 2013 -0300

    drm/i915: also disable south interrupts when handling them

We fix that by unconditionally enabling all interrupts in SDEIER, but
masking them as-needed in SDEIMR. Since only the single-threaded
setup/teardown (or suspend/resume) code touches that, no further
locking is required.

While at it also simplify the mask handling - we start out with all
interrupts cleared in the postinstall hook, and never enable a hpd
interrupt before hpd_irq_setup is called.

And finally, for consistency rename the ibx hpd setup function to
ibx_hpd_irq_setup.

v2: Fix race around SDEIER writes (Ville).

v3: Remove the superflous posting read for SDEIER, spotted by Ville.

Ville also wondered whether we shouldn't clear SDEIIR, since now
SDE interrupts are enabled before we have an irq handler installed.
But the master interrupt control bit in DEIER is still cleared, so we
should be fine.

Cc: Egbert Eich <eich@suse.de>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=62798
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoDRM/i915: Convert HPD interrupts to make use of HPD pin assignment in encoders (v2)
Egbert Eich [Thu, 28 Feb 2013 09:17:12 +0000 (04:17 -0500)]
DRM/i915: Convert HPD interrupts to make use of HPD pin assignment in encoders (v2)

This allows to enable HPD interrupts for individual pins to only receive
hotplug events from lines which are connected and working.

v2: Restructured initailization of const arrays following a suggstion
    by Chris Wilson <chris@chris-wilson.co.uk>

Signed-off-by: Egbert Eich <eich@suse.de>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoDRM/I915: Add enum hpd_pin to intel_encoder.
Egbert Eich [Mon, 25 Feb 2013 17:06:49 +0000 (12:06 -0500)]
DRM/I915: Add enum hpd_pin to intel_encoder.

To clean up hotplug support we add a new enum to intel_encoder:
enum hpd_pin. It allows the encoder to request a hpd line but leave
the details which IRQ is responsible on which chipset generation
to i915_irq.c.
This way requesting hotplug support will become really simple on
the encoder/connector level.

Signed-off-by: Egbert Eich <eich@suse.de>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoDRM/i915: Remove valleyview_hpd_irq_setup.
Egbert Eich [Mon, 25 Feb 2013 17:06:48 +0000 (12:06 -0500)]
DRM/i915: Remove valleyview_hpd_irq_setup.

It's basically identical to i915_hpd_irq_setup().

Signed-off-by: Egbert Eich <eich@suse.de>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: emit a hotplug event on resume
Jesse Barnes [Tue, 26 Mar 2013 16:25:46 +0000 (09:25 -0700)]
drm/i915: emit a hotplug event on resume

This will poke userspace into probing for configuration changes that may
have occurred across suspend/resume.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: enable VT switchless resume v3
Jesse Barnes [Tue, 26 Mar 2013 16:25:45 +0000 (09:25 -0700)]
drm/i915: enable VT switchless resume v3

With the other bits in place, we can do this safely.

v2: disable backlight on suspend to prevent premature enablement on resume
v3: disable CRTCs on suspend to allow RTD3 (Kristen)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: restore cursor and sprite state when forcing a config restore v2
Jesse Barnes [Tue, 26 Mar 2013 20:25:27 +0000 (13:25 -0700)]
drm/i915: restore cursor and sprite state when forcing a config restore v2

Needed for VT switchless resume.

v2: cursor state is now handled correctly in crtc_enable (Daniel)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add sprite restore function v3
Jesse Barnes [Tue, 26 Mar 2013 16:25:43 +0000 (09:25 -0700)]
drm/i915: add sprite restore function v3

To be used to restore sprite state on resume.

v2: move sprite tracking bits up so we don't track modified sprite state
v3: use src_x/y in sprite suspend/resume code (Ville)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm: add initial_config function to fb helper
Jesse Barnes [Tue, 19 Feb 2013 21:31:39 +0000 (13:31 -0800)]
drm: add initial_config function to fb helper

Rather than building a config which may or may not work, let the driver
build an initial fb config.  This allows the driver to use the BIOS boot
configuration for example, displaying kernel messages and the initial fb
console on the same outputs the BIOS lit up at boot time.  If that
fails, the driver can still fall back the same way as the core.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: dri-devel@lists.freedesktop.org
Acked-by: Dave Airlie <airlied@gmail.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Introduce i915_gem_object_create_stolen_for_preallocated
Chris Wilson [Tue, 19 Feb 2013 21:31:37 +0000 (13:31 -0800)]
drm/i915: Introduce i915_gem_object_create_stolen_for_preallocated

Wrap a preallocated region of stolen memory within an ordinary GEM
object, for example the BIOS framebuffer.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Always call fence-lost prior to removing the fence
Chris Wilson [Tue, 26 Mar 2013 11:29:27 +0000 (11:29 +0000)]
drm/i915: Always call fence-lost prior to removing the fence

There is a minute window for a race between put-fence removing the fence
and for a new transaction by an external party on the GTT mmap. That is
we must zap the mmap prior to removing the fence and not afterwards.

Fixes regression from
commit 61050808bb019ebea966b7b5bfd357aaf219fb51
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Tue Apr 17 15:31:31 2012 +0100

    drm/i915: Refactor put_fence() to use the common fence writing routine

v2: Remember the fence to remove with a local variable (gcc)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: HSW PM Frequency bits fix
Rodrigo Vivi [Mon, 25 Mar 2013 20:55:49 +0000 (17:55 -0300)]
drm/i915: HSW PM Frequency bits fix

According to HSW PM programming guide, frequency bits starts at
24 instead of 25.

v2: Paulo Zanoni noticed that only frequency bits can be set at
GEN6_RPNSWREQ. All others are read only.

CC: Ben Widawsky <ben@bwidawsk.net>
CC: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Warn if a pipe is enabled with a bogus port
Damien Lespiau [Mon, 25 Mar 2013 15:16:14 +0000 (15:16 +0000)]
drm/i915: Warn if a pipe is enabled with a bogus port

If TRANS_DDI_FUNC_CTL has been wrongly programmed with an incorrect
port, we are currently trying to read PORT_CLK_SEL(port) with an
uninitialized value.

Handle that case by returning PORT_CLK_SEL_NONE and warning about it.

v2: Move the warning inside intel_ddi_get_crtc_pll (Paulo Zanoni)

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Don't overclock on Haswell
Ben Widawsky [Sun, 24 Mar 2013 00:46:31 +0000 (17:46 -0700)]
drm/i915: Don't overclock on Haswell

HSW doesn't overclock the same way as IVB or SNB. I do not know about
VLV, so I've kept that off as well. I'm still working on getting the doc
updates to explain how we overclock on Haswell.

Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet: Add missing () spotted by Wu Fengguang's kernel build robot.
Acked by Ben.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: there's no PIPESTAT on HAS_PCH_SPLIT platforms
Paulo Zanoni [Fri, 22 Mar 2013 17:24:16 +0000 (14:24 -0300)]
drm/i915: there's no PIPESTAT on HAS_PCH_SPLIT platforms

So don't read it when capturing the error state. This solves
"unclaimed register" messages on Haswell when we have a GPU hang.

V2: Check for HAS_PCH_SPLIT instead of Gen5+ because VLV still has
this register.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: there's no DSPPOS register on gen4+
Paulo Zanoni [Fri, 22 Mar 2013 17:20:57 +0000 (14:20 -0300)]
drm/i915: there's no DSPPOS register on gen4+

So don't read it when capturing the error state. This solves some
"unclaimed register" messages on Haswell when we hang the GPU.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: fix DSPADDR Gen check
Paulo Zanoni [Fri, 22 Mar 2013 17:19:21 +0000 (14:19 -0300)]
drm/i915: fix DSPADDR Gen check

The first version of commit "drm/i915: there's no DSPADDR register on
Haswell" added 2 "!IS_HASWELL" checks. When reviewing the patch, Ben
suggested to make these checks more future-proof, so when Daniel
applied the patch he fixed the first check but not the second. This
commit makes the second check also "future-proof".

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Use BUG() in a case of a programming error
Damien Lespiau [Thu, 7 Mar 2013 15:30:28 +0000 (15:30 +0000)]
drm/i915: Use BUG() in a case of a programming error

The port number should always be correctly set. Do the same thing as the
switch above and use BUG() to signal that branch is not supposed to be
taken.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Rename intel_ddi_enable_pipe_func() to transcoder_func()
Damien Lespiau [Thu, 7 Mar 2013 15:30:27 +0000 (15:30 +0000)]
drm/i915: Rename intel_ddi_enable_pipe_func() to transcoder_func()

We are really talking about the transcoder function here and the disable
version uses trancoder in its name already, so let's try to be
consistent.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Cleanup if the EDP transcoder has a bobug input value
Damien Lespiau [Thu, 7 Mar 2013 15:30:26 +0000 (15:30 +0000)]
drm/i915: Cleanup if the EDP transcoder has a bobug input value

In the case where the hardware has been wrongly programmed and the EDP
TRANS_DDI_FUNC_CTL register has a bogus value in its EDP Input field, we
were using the pipe variable uninitialized.

In this case, shutdown the transcoder. It will be programmed correctly
the next time we try to enabled eDP.

Note from Paulo's review: Wrong modeset sequence can easily lead to
frozen machines hence the disable_ddi call might be risky. But since
things are awry already, doesn't matter too much.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
[danvet: Add note about Paulo's caution about potential hangs.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Error out if we are trying to use VGA with SPLL already in use
Damien Lespiau [Thu, 7 Mar 2013 15:30:25 +0000 (15:30 +0000)]
drm/i915: Error out if we are trying to use VGA with SPLL already in use

Our static analysis tool noticed that 'reg' could be used uninitialized if
we are trying to get a PLL to drive VGA and SPLL is already in use
(plls->spll_refcoung != 0).

In the (error) case above, let's return false to the caller and emit an
error.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Implement WaSwitchSolVfFArbitrationPriority
Ben Widawsky [Wed, 20 Mar 2013 21:49:14 +0000 (14:49 -0700)]
drm/i915: Implement WaSwitchSolVfFArbitrationPriority

Bspec mentions this for HSW+. I can't quite tell what the effects are,
and I don't easily have a way to test this.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Set the VIC in AVI infoframe for SDVO
Ville Syrjälä [Wed, 20 Mar 2013 16:10:07 +0000 (18:10 +0200)]
drm/i915: Set the VIC in AVI infoframe for SDVO

We do this for HDMI already, so I don't know why we wouldn't do
it for SDVO as well.

This is completely untested due to lack of hardware.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Kill a strange comment about DPMS functions
Ville Syrjälä [Wed, 20 Mar 2013 15:05:09 +0000 (17:05 +0200)]
drm/i915: Kill a strange comment about DPMS functions

This comment looks like some historical leftover. Get rid of it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Correct sandybrige overclocking
Ben Widawsky [Wed, 20 Mar 2013 03:19:56 +0000 (20:19 -0700)]
drm/i915: Correct sandybrige overclocking

Change the gen6+ max delay if the pcode read was successful (not the
inverse).

The previous code was all sorts of wrong and has existed since I broke
it:
commit 42c0526c930523425ff6edc95b7235ce7ab9308d
Author: Ben Widawsky <ben@bwidawsk.net>
Date:   Wed Sep 26 10:34:00 2012 -0700

    drm/i915: Extract PCU communication

I added some parentheses for clarity, and I also corrected the debug
message message to use the mask (wrong before I came along) and added a
print to show the value we're changing from.

Looking over the code, I'm not actually sure what we're trying to do. I
introduced the bug simply by extracting the function not implementing
anything new. We already set max_delay based on the capabilities
register (which is what we use elsewhere to determine min and max).
This would potentially increase it, I suppose? Jesse, I can't find the
document which explains the definitions of the pcode commands, maybe you
have it around.

Based on Jesse's response, this could potentially be for -fixes, or
stable, or maybe lead to us dropping it entirely. As the current code is
is, things won't completely break because of the aforementioned
capabilities register, and in my experimentation, enabling this has no
effect, it goes from 1100->1100.

I found this while reviewing Jesse's VLV patches.

Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet: Bikeshed-away the redudant parens spotted by Chris Wilson.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Introduce GEN7_FEATURES for device info
Ben Widawsky [Fri, 15 Mar 2013 18:17:54 +0000 (11:17 -0700)]
drm/i915: Introduce GEN7_FEATURES for device info

Recommended by Chris.

v2: Make it GEN7_FEATURES, and use it for vlv and hsw also (Ben)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Move num_pipes to intel info
Ben Widawsky [Wed, 13 Mar 2013 21:05:41 +0000 (14:05 -0700)]
drm/i915: Move num_pipes to intel info

Requested by Daniel.

v2: Fix incorrect num_pipe settings. (Chris)

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: fixup pd vs pt confusion in gen6 ppgtt code
Daniel Vetter [Tue, 19 Mar 2013 22:48:39 +0000 (23:48 +0100)]
drm/i915: fixup pd vs pt confusion in gen6 ppgtt code

The index variable points at a page table, not a page directory or a
pde. Ben Widawsky fix this up correctly in his ppgtt cleanup, but I've
botched the job and copy&pasted the old confusion from the original
gen6 ppgtt code in

commit def886c3768d24c4e0aa56ff98b5a468c2b5c9bf
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jan 24 14:44:56 2013 -0800

    drm/i915: vfuncs for ppgtt

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agostyle nit: Align function parameter continuation properly.
Daniel Vetter [Tue, 19 Mar 2013 22:37:08 +0000 (23:37 +0100)]
style nit: Align function parameter continuation properly.

11 years agodrm/i915: VLV doesn't have HDMI on port C
Jesse Barnes [Fri, 8 Mar 2013 18:46:03 +0000 (10:46 -0800)]
drm/i915: VLV doesn't have HDMI on port C

Port C is for eDP.  Port B is shared between HDMI and DP.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: DSPFW and BLC regs are in the display offset range
Jesse Barnes [Fri, 8 Mar 2013 18:45:59 +0000 (10:45 -0800)]
drm/i915: DSPFW and BLC regs are in the display offset range

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: set conservative clock gating values on VLV v2
Jesse Barnes [Fri, 8 Mar 2013 18:45:54 +0000 (10:45 -0800)]
drm/i915: set conservative clock gating values on VLV v2

We'll re-enable select bits as needed after testing and power measurement.

v2: split out wake handling bits (Jani)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: fix WaDisablePSDDualDispatchEnable on VLV v2
Jesse Barnes [Fri, 8 Mar 2013 18:45:51 +0000 (10:45 -0800)]
drm/i915: fix WaDisablePSDDualDispatchEnable on VLV v2

Can prevent a hang when we get to tessellation.  We need to set bit 15
as well for this workaround.

v2: update changelog with accurate info

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add more VLV IDs
Jesse Barnes [Fri, 8 Mar 2013 18:45:50 +0000 (10:45 -0800)]
drm/i915: add more VLV IDs

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: use VLV DIP routines on VLV v2
Jesse Barnes [Fri, 8 Mar 2013 18:46:01 +0000 (10:46 -0800)]
drm/i915: use VLV DIP routines on VLV v2

This fixes up broken logic introduced in

commit 90b107c8f7ea75ef55db4e0515dda86b245f8978
Author: Shobhit Kumar <shobhit.kumar@intel.com>
Date:   Wed Mar 28 13:39:32 2012 -0700

    drm/i915: Enable HDMI on ValleyView

That one was probably a rebase fail along the way.

v2: clean up init ordering (Daniel)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet: Pimp commit message a bit.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add media well to VLV force wake routines v2
Jesse Barnes [Fri, 8 Mar 2013 18:45:57 +0000 (10:45 -0800)]
drm/i915: add media well to VLV force wake routines v2

We could split this out into a separate routine at some point as an
optimization.

v2: use FORCEWAKE_KERNEL (Ville)

Note: Ville mentioned in his review that he declines to be responsible
if this blows up due to the lack of "readback a register != FW_ACK,
but from the same cacheline" magic we have in other forcewake
implementations.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Bikeshed overtly long lines according to checkpatch.pl. Nope,
this time around I didn't screw up printk message since I've left
those alone.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: don't use plane pipe select on VLV
Jesse Barnes [Fri, 8 Mar 2013 18:46:00 +0000 (10:46 -0800)]
drm/i915: don't use plane pipe select on VLV

Planes are fixed to pipes in VLV.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm: modify pages_to_sg prime helper to create optimized SG table
Rahul Sharma [Mon, 28 Jan 2013 13:38:48 +0000 (08:38 -0500)]
drm: modify pages_to_sg prime helper to create optimized SG table

It fixes the issue arises due to passing 'nr_pages' in place of 'nents' to
sg_alloc_table. When ARM_HAS_SG_CHAIN is disabled, it is causing failure in
creating SG table for the buffers having more than 204 physical pages i.e.
equal to SG_MAX_SINGLE_ALLOC.

When using sg_alloc_table_from_pages interface, in place of sg_alloc_table,
page list will be passes to get each contiguous section which is represented
by a single entry in the table. For a Contiguous Buffer, number of entries
should be equal to 1.

Following check is causing the failure which is not applicable for Non-Contig
buffers:

if (WARN_ON_ONCE(nents > max_ents))
return -EINVAL;

Above patch is well tested for EXYNOS4 and EXYNOS5 for with/wihtout IOMMU
supprot. NOUVEAU and RADEON platforms also depends on drm_prime_pages_to_sg
helper function.

This set is base on "exynos-drm-fixes" branch at
http://git.kernel.org/?p=linux/kernel/git/daeinki/drm-exynos.git

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Reviewed-by: Aaron Plattner <aplattner@nvidia.com>
Tested-by: Aaron Plattner <aplattner@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: use for_each_sg_page for setting up the gtt ptes
Imre Deak [Mon, 18 Feb 2013 17:28:04 +0000 (19:28 +0200)]
drm/i915: use for_each_sg_page for setting up the gtt ptes

The existing gtt setup code is correct - and so doesn't need to be fixed to
handle compact dma scatter lists similarly to the previous patches. Still,
take the for_each_sg_page macro into use, to get somewhat simpler code.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: create compact dma scatter lists for gem objects
Imre Deak [Mon, 18 Feb 2013 17:28:03 +0000 (19:28 +0200)]
drm/i915: create compact dma scatter lists for gem objects

So far we created a sparse dma scatter list for gem objects, where each
scatter list entry represented only a single page. In the future we'll
have to handle compact scatter lists too where each entry can consist of
multiple pages, for example for objects imported through PRIME.

The previous patches have already fixed up all other places where the
i915 driver _walked_ these lists. Here we have the corresponding fix to
_create_ compact lists. It's not a performance or memory footprint
improvement, but it helps to better exercise the new logic.

Reference: http://www.spinics.net/lists/dri-devel/msg33917.html
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: handle walking compact dma scatter lists
Imre Deak [Mon, 18 Feb 2013 17:28:02 +0000 (19:28 +0200)]
drm/i915: handle walking compact dma scatter lists

So far the assumption was that each dma scatter list entry contains only
a single page. This might not hold in the future, when we'll introduce
compact scatter lists, so prepare for this everywhere in the i915 code
where we walk such a list.

We'll fix the place _creating_ these lists separately in the next patch
to help the reviewing/bisectability.

Reference: http://www.spinics.net/lists/dri-devel/msg33917.html
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: set dummy page for stolen objects
Imre Deak [Fri, 22 Mar 2013 21:10:44 +0000 (23:10 +0200)]
drm/i915: set dummy page for stolen objects

This is needed since currently sg_for_each_page assumes that we have
a valid page in each sg item. It is only a real problem for
CONFIG_SPARSEMEM where the page is dereferenced, in other cases the
iterator works ok with an invalid page pointer.

We can remove this workaround when we have fixed sg_page_iter to work on
scatterlists without backing pages.

Signed-off-by: Imre Deak <imre.deak@intel.com>
11 years agodrm: handle compact dma scatter lists in drm_clflush_sg()
Imre Deak [Mon, 18 Feb 2013 17:28:01 +0000 (19:28 +0200)]
drm: handle compact dma scatter lists in drm_clflush_sg()

So far the assumption was that each scatter list entry contains a single
page. This might not hold in the future, when we'll introduce compact
scatter lists, so prepare for this here.

Reference: http://www.spinics.net/lists/dri-devel/msg33917.html
Signed-off-by: Imre Deak <imre.deak@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoMerge tag 'v3.9-rc3' into drm-intel-next-queued
Daniel Vetter [Tue, 19 Mar 2013 08:47:30 +0000 (09:47 +0100)]
Merge tag 'v3.9-rc3' into drm-intel-next-queued

Backmerge so that I can merge Imre Deak's coalesced sg entries fixes,
which depend upon the new for_each_sg_page introduce in

commit a321e91b6d73ed011ffceed384c40d2785cf723b
Author: Imre Deak <imre.deak@intel.com>
Date:   Wed Feb 27 17:02:56 2013 -0800

    lib/scatterlist: add simple page iterator

The merge itself is just two trivial conflicts:

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: allow force wake at init time on VLV v2
Jesse Barnes [Fri, 8 Mar 2013 18:45:53 +0000 (10:45 -0800)]
drm/i915: allow force wake at init time on VLV v2

We need to set the 'allow force wake' bit to enable forcewake handling
later on.

v2: split from clock gating patch (Jani)
    check for allowwakeack (Ville)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Remove unneeded dev argument
Ben Widawsky [Thu, 14 Mar 2013 00:21:06 +0000 (17:21 -0700)]
drm/i915: Remove unneeded dev argument

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Remove unused file arg from execbuf
Ben Widawsky [Thu, 14 Mar 2013 00:21:05 +0000 (17:21 -0700)]
drm/i915: Remove unused file arg from execbuf

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoLinux 3.9-rc3
Linus Torvalds [Sun, 17 Mar 2013 22:59:32 +0000 (15:59 -0700)]
Linux 3.9-rc3

11 years agoperf,x86: fix link failure for non-Intel configs
David Rientjes [Sun, 17 Mar 2013 22:49:10 +0000 (15:49 -0700)]
perf,x86: fix link failure for non-Intel configs

Commit 1d9d8639c063 ("perf,x86: fix kernel crash with PEBS/BTS after
suspend/resume") introduces a link failure since
perf_restore_debug_store() is only defined for CONFIG_CPU_SUP_INTEL:

arch/x86/power/built-in.o: In function `restore_processor_state':
(.text+0x45c): undefined reference to `perf_restore_debug_store'

Fix it by defining the dummy function appropriately.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoperf,x86: fix wrmsr_on_cpu() warning on suspend/resume
Linus Torvalds [Sun, 17 Mar 2013 22:44:43 +0000 (15:44 -0700)]
perf,x86: fix wrmsr_on_cpu() warning on suspend/resume

Commit 1d9d8639c063 ("perf,x86: fix kernel crash with PEBS/BTS after
suspend/resume") fixed a crash when doing PEBS performance profiling
after resuming, but in using init_debug_store_on_cpu() to restore the
DS_AREA mtrr it also resulted in a new WARN_ON() triggering.

init_debug_store_on_cpu() uses "wrmsr_on_cpu()", which in turn uses CPU
cross-calls to do the MSR update.  Which is not really valid at the
early resume stage, and the warning is quite reasonable.  Now, it all
happens to _work_, for the simple reason that smp_call_function_single()
ends up just doing the call directly on the CPU when the CPU number
matches, but we really should just do the wrmsr() directly instead.

This duplicates the wrmsr() logic, but hopefully we can just remove the
wrmsr_on_cpu() version eventually.

Reported-and-tested-by: Parag Warudkar <parag.lkml@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodrm/i915: Resurrect ring kicking for semaphores, selectively
Chris Wilson [Thu, 14 Mar 2013 15:52:05 +0000 (17:52 +0200)]
drm/i915: Resurrect ring kicking for semaphores, selectively

Once we thought we got semaphores working, we disabled kicking the ring
if hangcheck fired whilst waiting upon a ring as it was doing more harm
than good:

commit 4e0e90dcb8a7df1229c69e30abebb59b0b3c2a1f
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Dec 14 13:56:58 2011 +0100

    drm/i915: kicking rings stuck on semaphores considered harmful

However, life is never that easy and semaphores are still causing
problems whereby the value written by one ring (bcs) is not being
propagated to the waiter (rcs). Thus the waiter never wakes up and we
declare the GPU hung, which often has unfortunate consequences, even if
we successfully reset the GPU.

But the GPU is idle as it has completed the work, just didn't notify its
clients. So we can detect the incomplete wait during hang check and
probe the target ring to see if has indeed emitted the breadcrumb seqno
following the work and then and only then kick the waiter.

Based on a suggestion by Ben Widawsky.

v2: cross-check wait with iphdr. fix signaller calculation.

References: https://bugs.freedesktop.org/show_bug.cgi?id=54226
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ben Widawsky <ben@bwidawsk.net>
Acked-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add missing space in error message
Paulo Zanoni [Wed, 6 Mar 2013 23:03:22 +0000 (20:03 -0300)]
drm/i915: add missing space in error message

To avoid this:
[  256.798060] [drm] capturing error event; look for more information
in/sys/kernel/debug/dri/0/i915_error_state

Ben Widawsky identified that this regression has been introduced in

commit 2f86f1916504525a6fdd6b412374b4ebf1102cbe
Author: Ben Widawsky <ben@bwidawsk.net>
Date:   Mon Jan 28 15:32:15 2013 -0800

    drm/i915: Error state should print /sys/kernel/debug
        ...
    [danvet: split up long line.] <----- he did it
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Pimp commit message with the regression note. Also, order
more brown paper bags, I've run out.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: don't save/restore PCH_LVDS on LPT
Paulo Zanoni [Wed, 6 Mar 2013 23:03:20 +0000 (20:03 -0300)]
drm/i915: don't save/restore PCH_LVDS on LPT

Because the register does not exist on LPT. The interesting fact is
that reading/writing PCH_LVDS on LPT does *not* give us "unclaimed
register" messages, but the register value is always 0.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: reorganize intel_lvds_supported
Paulo Zanoni [Wed, 6 Mar 2013 23:03:19 +0000 (20:03 -0300)]
drm/i915: reorganize intel_lvds_supported

Now it returns false for all platforms unless they're explicitly
listed on the function. There should be no real difference, except for
the fact that it now returns false on Haswell.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: add HAS_POWER_WELL
Paulo Zanoni [Wed, 6 Mar 2013 23:03:18 +0000 (20:03 -0300)]
drm/i915: add HAS_POWER_WELL

We're starting to add many IS_HASWELL checks for the power well code,
so add a HAS_POWER_WELL macro to properly document that we're checking
for hardware that has the power down well.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
[danvet: Resolve conflicts since some converted code was added by
not-yet merged patches.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: there's no DSPADDR register on Haswell
Paulo Zanoni [Wed, 6 Mar 2013 23:03:14 +0000 (20:03 -0300)]
drm/i915: there's no DSPADDR register on Haswell

So don't read it when we hang the GPU. This solves "unclaimed
register" messages.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Future-proof by adding a gen >= 7 check in addition to the
!IS_HSW check from Paulo's original patch, suggested by Ben.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: there's no DSPSIZE register on gen4+
Paulo Zanoni [Wed, 6 Mar 2013 23:03:13 +0000 (20:03 -0300)]
drm/i915: there's no DSPSIZE register on gen4+

So don't read it when capturing the error state. This solves some
"unclaimed register" messages on Haswell when we hang the GPU.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: capture the correct cursor registers on IVB
Paulo Zanoni [Wed, 6 Mar 2013 23:03:12 +0000 (20:03 -0300)]
drm/i915: capture the correct cursor registers on IVB

This solves some "unclaimed register" messages when there's a GPU hang
on Haswell.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Add missing IS_VLV check as spotted by Ville Syrjälä.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: disable sound first on intel_disable_ddi
Paulo Zanoni [Wed, 6 Mar 2013 23:03:09 +0000 (20:03 -0300)]
drm/i915: disable sound first on intel_disable_ddi

Our mode set sequence documentation says audio must be disabled first.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Resolve conflict since the first patch in this series isn't
applied yet. Also bikeshed commit message as suggested by Ben.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Sun, 17 Mar 2013 18:04:14 +0000 (11:04 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes from Chris Mason:
 "Eric's rcu barrier patch fixes a long standing problem with our
  unmount code hanging on to devices in workqueue helpers.  Liu Bo
  nailed down a difficult assertion for in-memory extent mappings."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix warning of free_extent_map
  Btrfs: fix warning when creating snapshots
  Btrfs: return as soon as possible when edquot happens
  Btrfs: return EIO if we have extent tree corruption
  btrfs: use rcu_barrier() to wait for bdev puts at unmount
  Btrfs: remove btrfs_try_spin_lock
  Btrfs: get better concurrency for snapshot-aware defrag work

11 years agoBtrfs: fix warning of free_extent_map
Liu Bo [Fri, 15 Mar 2013 14:46:39 +0000 (08:46 -0600)]
Btrfs: fix warning of free_extent_map

Users report that an extent map's list is still linked when it's actually
going to be freed from cache.

The story is that

a) when we're going to drop an extent map and may split this large one into
smaller ems, and if this large one is flagged as EXTENT_FLAG_LOGGING which means
that it's on the list to be logged, then the smaller ems split from it will also
be flagged as EXTENT_FLAG_LOGGING, and this is _not_ expected.

b) we'll keep ems from unlinking the list and freeing when they are flagged with
EXTENT_FLAG_LOGGING, because the log code holds one reference.

The end result is the warning, but the truth is that we set the flag
EXTENT_FLAG_LOGGING only during fsync.

So clear flag EXTENT_FLAG_LOGGING for extent maps split from a large one.

Reported-by: Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de>
Reported-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
11 years agoMerge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Sat, 16 Mar 2013 01:06:55 +0000 (18:06 -0700)]
Merge branch 'kbuild' of git://git./linux/kernel/git/mmarek/kbuild

Pull kbuild fix from Michal Marek:
 "One fix for for make headers_install/headers_check to not require make
  3.81.  The requirement has been accidentally introduced in 3.7."

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kbuild: fix make headers_check with make 3.80