Most of the IRQ init is setting up hooks so move that part earlier.
Leave the pm_qos_add_request() call in place.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1458128348-15730-4-git-send-email-imre.deak@intel.com

These are all SW only init steps not accessing the device and they only
need the platform identification macros to work, which are already
available earlier, so move these init steps earlier.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1458128348-15730-3-git-send-email-imre.deak@intel.com

MCHBAR is cleaned up in i915_mmio_cleanup(), so the separate call in
i915_driver_load() is incorrect.

CC: David Weinehall <david.weinehall@intel.com>
Fixes: ad5c3d3f ("drm/i915: Move MCHBAR setup earlier during init")
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458128348-15730-2-git-send-email-imre.deak@intel.com

In full gpu reset we prime all engines and reset domains corresponding to
each engine. Per engine reset is just a special case of this process
wherein only a single engine is reset. This change is aimed to modify
relevant functions to achieve this. There are some other steps we carry out
in case of engine reset which are addressed in later patches.

Reset func now accepts a mask of all engines that need to be reset. Where
per engine resets are supported, error handler populates the mask
accordingly otherwise all engines are specified.

v2: ALL_ENGINES mask fixup, better for_each_ring_masked (Chris)
v3: Whitespace fixes (Chris)
v4: Rebase due to s/ring/engine

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NMika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: NArun Siluvery <arun.siluvery@linux.intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NMika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458143640-20563-1-git-send-email-mika.kuoppala@intel.com

We've been accumulating code across the driver that depends on the VBT
specific structures and defines. The VBT is an uncontrollable
beast. Encourage encapsulation of the VBT data by hiding the structures
and defines in a private header only to be included from intel_bios.c.
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458125015-7931-7-git-send-email-jani.nikula@intel.com

drivers/gpu/drm/i915/intel_dpll_mgr.c:1200:32: warning: Using plain integer as NULL pointer

Fixes: 304b65cb ("drm/i915: Move SKL/KLB pll selection logic to intel_dpll_mgr.c")
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458144418-20046-1-git-send-email-jani.nikula@intel.com

Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457944075-14123-4-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: NAnder Conselvan de Oliveira <conselvan2@gmail.com>

Warn for the wrong mask in enable only. Disable will have the wrong mask now
because the new state is committed before disabling the old state.

Changes since v1:
- Use crtc_mask (Durgadoss)
- Rebase.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457944075-14123-3-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: NAnder Conselvan de Oliveira <conselvan2@gmail.com>

This makes it easier to verify correct dpll setup with only a single crtc.
It is also useful to detect double dpll enable/disable.

Changes since v1:
- Rebase on top of Ander's dpll rework.
- Change debugfs active to a mask.
- Change enabled_crtcs and active_crtcs to unsigned.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457944075-14123-2-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: NAnder Conselvan de Oliveira <conselvan2@gmail.com>

After unplugging a DP MST display from the system, we have to go through
and destroy all of the DRM connectors associated with it since none of
them are valid anymore. Unfortunately, intel_dp_destroy_mst_connector()
doesn't do a good enough job of ensuring that throughout the destruction
process that no modesettings can be done with the connectors. As it is
right now, intel_dp_destroy_mst_connector() works like this:

* Take all modeset locks
* Clear the configuration of the crtc on the connector, if there is one
* Drop all modeset locks, this is required because of circular
  dependency issues that arise with trying to remove the connector from
  sysfs with modeset locks held
* Unregister the connector
* Take all modeset locks, again
* Do the rest of the required cleaning for destroying the connector
* Finally drop all modeset locks for good

This only works sometimes. During the destruction process, it's very
possible that a userspace application will attempt to do a modesetting
using the connector. When we drop the modeset locks, an ioctl handler
such as drm_mode_setcrtc has the oppurtunity to take all of the modeset
locks from us. When this happens, one thing leads to another and
eventually we end up committing a mode with the non-existent connector:

	[drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed to enable link training
	[drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7cf0001f
	[drm:intel_dp_start_link_train [i915]] *ERROR* failed to start channel equalization
	[drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7cf0001f
	[drm:intel_mst_pre_enable_dp [i915]] *ERROR* failed to allocate vcpi

And in some cases, such as with the T460s using an MST dock, this
results in breaking modesetting and/or panicking the system.

To work around this, we now unregister the connector at the very
beginning of intel_dp_destroy_mst_connector(), grab all the modesetting
locks, and then hold them until we finish the rest of the function.

CC: stable@vger.kernel.org
Signed-off-by: NLyude <cpaul@redhat.com>
Signed-off-by: NRob Clark <rclark@redhat.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1458155884-13877-1-git-send-email-cpaul@redhat.com

This version of GuC firmware fixes the engine reset issue where golden
context LRC address is treated as page index by mistake. It also fixes
the problem that scheduler stops submiting to one engine when the other
engine work queue is full.
Signed-off-by: NAlex Dai <yu.dai@intel.com>
Reviewed-by: NDave Gordon <david.s.gordon@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>

Favor a single point of truth instead of duplicating the
information. The change also filters out unsupported DSI ports at this
stage, accepting only ports A and C, instead of waiting until the port
checks.
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458125015-7931-6-git-send-email-jani.nikula@intel.com

Use the connector type instead of VBT directly to decide which backlight
mechanism to use on VLV/CHV. (Indirectly, this is the same thing, but
hides the VBT use.)
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458125015-7931-5-git-send-email-jani.nikula@intel.com

Hide knowledge about VBT child devices in intel_bios.c.

v2: Move port check to intel_bios.c (Sivakumar)
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458125015-7931-4-git-send-email-jani.nikula@intel.com

Hide knowledge about VBT child devices in intel_bios.c.
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458125015-7931-3-git-send-email-jani.nikula@intel.com

Hide knowledge about VBT child devices in intel_bios.c.
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458125015-7931-2-git-send-email-jani.nikula@intel.com

Hide knowledge about VBT child devices in intel_bios.c.

v2: also move int_tv_support check to intel_bios.c (Sivakumar)
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458125015-7931-1-git-send-email-jani.nikula@intel.com

BXT isn't as limited as BYT and CHT regarding DSI pipes and ports.
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/8bea85b86aaf7a15f854a656bf8d3208a3afe0bd.1458070700.git.jani.nikula@intel.com

Make the code easier to read and update. No functional changes.
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/04b20a9be6a9481ca2eb2a42cdcdc27358152e5f.1458070700.git.jani.nikula@intel.com

Nicer for eDP (actually "EDP" instead of "D"), and makes future
expansion for DSI transcoders easier.
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/2ac55ed584e450fe154daecb6453dff8eede5e7d.1458070700.git.jani.nikula@intel.com

Same as for_each_dsi_port, but for general use. Leave the
for_each_dsi_port version around as an "alias" for now to not cause too
much churn. No functional changes.
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/a0ef5bf33395e1fcd87178b17d6687b022042cf7.1458070700.git.jani.nikula@intel.com

A small step moving us closer to DRM MIPI DSI code. Use enum
mipi_dsi_pixel_format instead of our own. The first benefit is being
able to use common mipi_dsi_pixel_format_to_bpp().

There's a little back and forth conversion with the VBT -> enum ->
register, since we have just shoved the VBT value into the register
directly. Longer term, all the VBT parsing and deciphering should be
done in intel_bios.c, and abstracted there.
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458123700-16003-2-git-send-email-jani.nikula@intel.com

The enum mipi_dsi_pixel_format defines MIPI_DSI_FMT_RGB666 for the
"loose" 24 bpp format and MIPI_DSI_FMT_RGB666_PACKED for the 18 bpp
format. We have this the other way round, defining a loose version for
24 bpp.

Follow suit with what's in enum mipi_dsi_pixel_format to avoid future
confusion. Rename

VID_MODE_FORMAT_RGB666 -> VID_MODE_FORMAT_RGB666_PACKED
VID_MODE_FORMAT_RGB666_LOOSE -> VID_MODE_FORMAT_RGB666
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458123700-16003-1-git-send-email-jani.nikula@intel.com

If the firmware is generic and has a run-anywhere mode, enable it rather
than completely failing on unknown HW revisions.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Damien Lespiau <damien.lespiau@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Sunil Kamath <sunil.kamath@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Animesh Manna <animesh.manna@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457352357-8433-1-git-send-email-chris@chris-wilson.co.uk

Adds an (unsafe; auto-kernel-tainting) boolean module parameter to the i915
drm driver: "enable_dp_mst", which is enabled by default.  Disabling the
parameter forces newly connected DisplayPort sinks to report as not
supporting multi-stream transport (MST), thus "forcing" the use of
single-stream transport (SST).

v2: rename parameter to conform to style
v3: add signoff
Signed-off-by: NNathan Schulte <nmschulte@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1458054845-5837-1-git-send-email-nmschulte@gmail.com

This time using only sed and a few by hand.

v2: Rename also intel_ring_id and intel_ring_initialized.
v3: Fixed typo in intel_ring_initialized.
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1458126040-33105-1-git-send-email-tvrtko.ursulin@linux.intel.com

Some trivial ones, first pass done with Coccinelle:

@@
@@
(
- I915_NUM_RINGS
+ I915_NUM_ENGINES
|
- intel_ring_flag
+ intel_engine_flag
|
- for_each_ring
+ for_each_engine
|
- i915_gem_request_get_ring
+ i915_gem_request_get_engine
|
- intel_ring_idle
+ intel_engine_idle
|
- i915_gem_reset_ring_status
+ i915_gem_reset_engine_status
|
- i915_gem_reset_ring_cleanup
+ i915_gem_reset_engine_cleanup
|
- init_ring_lists
+ init_engine_lists
)

But that didn't fully work so I cleaned it up with:

for f in *.[hc]; do sed -i -e s/I915_NUM_RINGS/I915_NUM_ENGINES/ $f; done
for f in *.[hc]; do sed -i -e s/i915_gem_request_get_ring/i915_gem_request_get_engine/ $f; done
for f in *.[hc]; do sed -i -e s/intel_ring_flag/intel_engine_flag/ $f; done
for f in *.[hc]; do sed -i -e s/intel_ring_idle/intel_engine_idle/ $f; done
for f in *.[hc]; do sed -i -e s/init_ring_lists/init_engine_lists/ $f; done
for f in *.[hc]; do sed -i -e s/i915_gem_reset_ring_cleanup/i915_gem_reset_engine_cleanup/ $f; done
for f in *.[hc]; do sed -i -e s/i915_gem_reset_ring_status/i915_gem_reset_engine_status/ $f; done

v2: Rebase.
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>

below and a couple manual fixups.

@@
identifier I, J;
@@
struct I {
...
- struct intel_engine_cs *J;
+ struct intel_engine_cs *engine;
...
}
@@
identifier I, J;
@@
struct I {
...
- struct intel_engine_cs J;
+ struct intel_engine_cs engine;
...
}
@@
struct drm_i915_private *d;
@@
(
- d->ring
+ d->engine
)
@@
struct i915_execbuffer_params *p;
@@
(
- p->ring
+ p->engine
)
@@
struct intel_ringbuffer *r;
@@
(
- r->ring
+ r->engine
)
@@
struct drm_i915_gem_request *req;
@@
(
- req->ring
+ req->engine
)

v2: Script missed the tracepoint code - fixed up by hand.
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>

@@
identifier func;
@@
func(..., struct intel_engine_cs *
- ring
+ engine
, ...)
{
<...
- ring
+ engine
...>
}
@@
identifier func;
type T;
@@
T func(..., struct intel_engine_cs *
- ring
+ engine
, ...);
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>

Done by the Coccinelle script below plus a manual
intervention to GEN8_RING_SEMAPHORE_INIT.

@@
expression E;
@@
- struct intel_engine_cs *ring = E;
+ struct intel_engine_cs *engine = E;
<+...
- ring
+ engine
...+>
@@
@@
- struct intel_engine_cs *ring;
+ struct intel_engine_cs *engine;
<+...
- ring
+ engine
...+>
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>

After the commit below the Broxton PLL IDs had an off-by-one error, so
fix this up. Also add a missing brace at intel_shared_dpll_init(), it
happened to compile only due to the way the IS_BROXTON macro is defined.

v2:
- remove debugging left-over

Fixes: a3c988ea ("drm/i915: Make SKL/KBL DPLL0 managed by the shared dpll code")
CC: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
CC: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NAnder Conselvan de Oliveira <conselvan2@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457978134-12362-1-git-send-email-imre.deak@intel.com

Whenever there's an update to the primary plane,
fbc_pre_update and fbc_post_update are called. Kill off
intel_crtc->atomic.update_fbc and now that intel_crtc->atomic
is empty, kill it off too.

Changes since v1:
- Add a intel_fbc_supports_rotation helper.
Changes since v2:
- Remove intel_fbc_supports_rotation_helper.
- Remove unrelated changes.
Changes since v3:
- Rebase
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457516145-32117-2-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>

fb_bits is useful to have in the crtc_state for cs flips when
the code is updated to use intel_frontbuffer_flip_prepare/complete.
So calculate it in advance and move it to crtc_state. The other stuff
can be calculated in post_plane_update, and aren't useful elsewhere.

Changes since v1:
- Changing wording, remove comment about loop.
Changes since v2:
- Rebase.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: NAnder Conselvan de Oliveira <conselvan2@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457516145-32117-1-git-send-email-maarten.lankhorst@linux.intel.com

Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

After the GMBUS transfer times out, we set force_bit=1 and
return -EAGAIN expecting the i2c core to call the .master_xfer
hook again so that we will retry the same transfer via bit-banging.
This is in case the gmbus hardware is somehow faulty.

Unfortunately we left adapter->retries to 0, meaning the i2c core
didn't actually do the retry. Let's tell the core we want one retry
when we return -EAGAIN.

Note that i2c-algo-bit also uses this retry count for some internal
retries, so we'll end up increasing those a bit as well.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: drm-intel-fixes@lists.freedesktop.org
Fixes: bffce907 ("drm/i915: abstract i2c bit banging fallback in gmbus xfer")
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457366220-29409-2-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NJani Nikula <jani.nikula@intel.com>
(cherry picked from commit 8b1f165a)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

When intel_update_watermarks is called on skylake from the hw
state readout disable function it calls intel_update_watermarks.
intel_update_watermarks inspects crtc->state, which should be
set to disabled.

This wasn't the case, and this resulted in a divide-by-zero in
skl_update_wm when intel_update_watermarks got called.

 ------------[ cut here ]------------
 WARNING: CPU: 1 PID: 295 at drivers/gpu/drm/i915/intel_pm.c:2834
skl_update_pipe_wm+0x102/0x8c0 [i915]()
 WARN_ON(!config->num_pipes_active)
 Modules linked in: coretemp i915(+)
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 CPU: 1 PID: 295 Comm: systemd-udevd Tainted: G     U  W       4.5.0-rc4
-xxxxxx #25
 Hardware name: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
  0000000000000000 ffff88003777f5a8 ffffffff813485c2 ffff88003777f5f0
  ffffffffa0236240 ffff88003777f5e0 ffffffff81050fce ffff8800aa420000
  ffff8800aba18000 ffff8800aba18000 ffff880037304c00 ffff8800aa420000
 Call Trace:
  [<ffffffff813485c2>] dump_stack+0x67/0x95
  [<ffffffff81050fce>] warn_slowpath_common+0x9e/0xc0
  [<ffffffff8105103c>] warn_slowpath_fmt+0x4c/0x50
  [<ffffffff8106945e>] ? flush_work+0x8e/0x280
  [<ffffffff810693d5>] ? flush_work+0x5/0x280
  [<ffffffffa016add2>] skl_update_pipe_wm+0x102/0x8c0 [i915]
  [<ffffffffa016b96f>] skl_update_wm+0xff/0x5f0 [i915]
  [<ffffffff810928ee>] ? trace_hardirqs_on_caller+0x15e/0x1d0
  [<ffffffff8109296d>] ? trace_hardirqs_on+0xd/0x10
  [<ffffffffa016ce6e>] intel_update_watermarks+0x1e/0x30 [i915]
  [<ffffffffa01d3ee2>] intel_crtc_disable_noatomic+0xd2/0x150 [i915]
  [<ffffffffa01dd3d2>] intel_modeset_setup_hw_state+0xdd2/0xde0 [i915]
  [<ffffffffa01dfd83>] intel_modeset_init+0x15a3/0x1950 [i915]
  [<ffffffffa02160b6>] i915_driver_load+0x13c6/0x1720 [i915]
  [<ffffffff81522160>] ? add_sysfs_fw_map_entry+0x9b/0x9b
  [<ffffffffa00b15ef>] drm_dev_register+0x6f/0xb0 [drm]
  [<ffffffffa00b3b3a>] drm_get_pci_dev+0x10a/0x1d0 [drm]
  [<ffffffffa01582d9>] i915_pci_probe+0x49/0x50 [i915]
  [<ffffffff8138ae30>] pci_device_probe+0x80/0xf0
  [<ffffffff8143e2ac>] driver_probe_device+0x1bc/0x3d0
  [<ffffffff8143e526>] __driver_attach+0x66/0x90
  [<ffffffff8143e4c0>] ? driver_probe_device+0x3d0/0x3d0
  [<ffffffff8143be3b>] bus_for_each_dev+0x5b/0xa0
  [<ffffffff8143db3e>] driver_attach+0x1e/0x20
  [<ffffffff8143d461>] bus_add_driver+0x151/0x270
  [<ffffffff8143eabc>] driver_register+0x8c/0xd0
  [<ffffffff8138a2ed>] __pci_register_driver+0x5d/0x60
  [<ffffffffa00b3c58>] drm_pci_init+0x58/0xf0 [drm]
  [<ffffffff8109296d>] ? trace_hardirqs_on+0xd/0x10
  [<ffffffffa02aa000>] ? 0xffffffffa02aa000
  [<ffffffffa02aa094>] i915_init+0x94/0x9b [i915]
  [<ffffffff81000423>] do_one_initcall+0x113/0x1f0
  [<ffffffff810a4b21>] ? rcu_read_lock_sched_held+0x61/0x90
  [<ffffffff811601dc>] ? kmem_cache_alloc_trace+0x1cc/0x280
  [<ffffffff8111110a>] do_init_module+0x60/0x1c8
  [<ffffffff810c731b>] load_module+0x1ceb/0x2410
  [<ffffffff810c3a60>] ? store_uevent+0x40/0x40
  [<ffffffff811763d1>] ? kernel_read+0x41/0x60
  [<ffffffff810c7c1d>] SYSC_finit_module+0x8d/0xa0
  [<ffffffff810c7c4e>] SyS_finit_module+0xe/0x10
  [<ffffffff815f1e97>] entry_SYSCALL_64_fastpath+0x12/0x6f
 ---[ end trace 1149e9ab3695a423 ]---
 ------------[ cut here ]------------

Changes since v1:
- Clear state before calling any function after .crtc_disable.
Reported-by: NTvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/56D6FD21.7020907@linux.intel.comTested-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: NAnder Conselvan de Oliveira <conselvan2@gmail.com>

Avoid some head spinning by renaming the crtc_state variable to
old_crtc_state.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457543247-13987-6-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>

We must wait for the hardware to exit cxsr before doing the plane
update, so add the missing vblank wait to pre_plane_update after
disabling cxsr.

We have the wait for vblank in the pre_disable_primary hook, but not in
the pre_plane_update hook. Just move the code from (and comment) from
pre_disable_primary into pre_plane_update. Well, we still have to keep
it in pre_disable_primary for these strange _noatomic codepaths, so
let's do another version of pre_disable_primary for those. Also toss
in some FIXMEs in the hope that someone will eventually clean up this
pre_disable_primary mess.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457543247-13987-5-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>

commit 92826fcd ("drm/i915: Calculate watermark related members in the crtc_state, v4.")
broke thigns by removing the pre vs. post wm update distinction. We also
lost the pre plane wm update entirely for VLV/CHV from the crtc enable
path.

This caused underruns on modeset and plane enable/disable on CHV,
and often those can lead to a dead pipe.

So let's bring back the pre vs. post thing, and let's toss in an
explicit wm update to valleyview_crtc_enable() to avoid having to
put it into the common code.

This is more or less a partial revert of the offending commit.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: drm-intel-fixes@lists.freedesktop.org
Fixes: 92826fcd ("drm/i915: Calculate watermark related members in the crtc_state, v4.")
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457543247-13987-4-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>

Pass the current crtc state, not the old crtc state, to the
.update_plane() hook.

Noticed on BSW when PRIMSIZE was getting programmed to a stale value
which produced utter garbage on screen eg. wwhen going from 1920x1080
to 1024x768.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: a758e684 ("drm/i915: Do not use commit_plane for sprite planes.")
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457543247-13987-3-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>