Up until recently, semaphores weren't enabled in BDW so we didn't care
about them. But then Rodrigo came and enabled them:
commit 521e62e49a
Author: Rodrigo Vivi <rodrigo.vivi@intel.com>
drm/i915: Enable semaphores on BDW
So now we have to explicitly disable them for Execlists until both
features play nicely.
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Atm we may leave eDP VDD enabled during system suspend after the CRTCs
are disabled through an HPD->DPCD read event. So disable VDD during
suspend at a point when no HPDs can occur.
Note that runtime suspend doesn't have the same problem, since there the
RPM ref held by VDD provides already the needed serialization.
v2:
- add note to commit message about the runtime suspend path (Ville)
- use edp_panel_vdd_off_sync(), so we can keep the WARN in
edp_panel_vdd_off() (Ville)
v3:
- rebased on -fixes (for_each_intel_encoder()->list_for_each_entry())
(Imre)
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v2)
Cc: stable@vger.kernel.org (3.16+)
[Jani: fix sparse warning reported by Fengguang Wu]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Make sure these work handlers don't run after we system suspend or
unload the driver. Note that we don't cancel the handlers during runtime
suspend. That could lead to a lockup, since we take a runtime PM ref
from the handlers themselves. Fortunaltely canceling there is not needed
since the RPM ref itself provides for the needed serialization.
v2:
- fix the order of canceling dig_port_work wrt. hotplug_work (Ville)
- zero out {long,short}_hpd_port_mask and hpd_event_bits for speed
(Ville)
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: stable@vger.kernel.org (3.16+)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
On VLV, post S0i3 during i915_drm_thaw following issue is observed during ring
initialization.
[ 335.604039] [drm:stop_ring] ERROR render ring :timed out trying to stop ring
[ 336.607340] [drm:stop_ring] ERROR render ring :timed out trying to stop ring
[ 336.607345] [drm:init_ring_common] ERROR failed to set render ring head to zero ctl 00000000 head 00000000 tail 00000000 start 00000000
[ 337.610645] [drm:stop_ring] ERROR bsd ring :timed out trying to stop ring
[ 338.613952] [drm:stop_ring] ERROR bsd ring :timed out trying to stop ring
[ 338.613956] [drm:init_ring_common] ERROR failed to set bsd ring head to zero ctl 00000000 head 00000000 tail 00000000 start 00000000
[ 339.617256] [drm:stop_ring] ERROR render ring :timed out trying to stop ring
[ 339.617258] -----------[ cut here ]-----------
[ 339.617267] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/i915/intel_ringbuffer.c:1666 intel_cleanup_ring+0xe6/0xf0()
[ 339.617396] --[ end trace 5ef5ed1a3c92e2a6 ]--
[ 339.617428] [drm:__i915_drm_thaw] ERROR failed to re-initialize GPU, declaring wedged!
This is happening since wake is not enabled and Gunit registers are not restored.
For this system suspend/resume paths need to follow save/restore and additional
platform specific setup in suspend_complete and resume_prepare.
suspend_complete is shared unconditionaly for VLV, HSW, BDW. resume_prepare for
HSW and BDW has pc8 disabling which is needed during thaw_early so sharing
uncondtionally. For VLV and SNB runtime resume specific sequence exists.
Cc: Imre Deak <imre.deak@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Goel, Akash <akash.goel@intel.com>
Signed-off-by: Sagar Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
With this change, intel_runtime_suspend and intel_runtime_resume functions
become completely platform agnostic. Platform specific suspend/resume
changes are moved to intel_suspend_complete and intel_resume_prepare.
Cc: Imre Deak <imre.deak@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Goel, Akash <akash.goel@intel.com>
Signed-off-by: Sagar Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Rather than take and release the console_lock() around a non-existent
DRM_I915_FBDEV, move the lock acquisation into the callee where it will
be compiled out by the config option entirely. This includes moving the
deferred fb_set_suspend() dance and encapsulating it entirely within
intel_fbdev.c.
v2: Use an integral work item so that we can explicitly flush the work
upon suspend/unload.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
[danvet: Add the flush_work in fbdev_fini per the mailing list
discussion. And s/BUG_ON/WARN_ON/ because.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This reverts commit 521e62e49a.
Although POST_SYNC brought a bit of stability to Semaphores on BDW
it didn't solved all issues and some hungs can still occour when
semaphores are enabled on BDW. Also some sloweness can be found on some
igt tests, althoguth it apparently doesn't affect real workloads.
Besides that, no real performance gain was found on our tests with different
and even multiple workloads.
Let's disable it again for now. At least until we are sure it is safe
to re-enable it.
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Pull in drm-next with Dave's DP MST support so that I can merge some
conflicting patches which also touch the driver load sequencing around
interrupt handling.
Conflicts:
drivers/gpu/drm/i915/intel_display.c
drivers/gpu/drm/i915/intel_dp.c
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
When I moved the irq disable down to after display disable,
I didn't realise the gt suspend also required irqs off, so move it
down as well.
Fixes WARNs seen at suspend/resume time.
v2: moved the rps flush down as well.
Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
By the time I wrote this patch, it allowed me to catch some problems.
But due to patch reordering - in order to prevent fake "regression"
reports - this patch may be merged after the fixes of the problems
identified by this patch.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
On VLV, after i915_pm_suspend display power wells are staying
power ungated. So, after initiating mem sleep "echo mem > /sys/power/state"
Display is staing D0 State. There might be better way/place to power gate
these wells. Also, we need to make sure that if wells are power gated due to
DPMS OFF sequence, they need not be turned off by i915_pm_suspend again.
v2: Extracted helper for intel_crtc_disable and power gating CRTC power wells.
[Daniel]
Cc: Imre Deak <imre.deak@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Change-Id: I34c80da66aa24c423a5576c68aa1f3a8d0f43848
Signed-off-by: Borun Fu <borun.fu@intel.com>
Signed-off-by: Sagar Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This adds DP 1.2 MST support on Haswell systems.
Notes:
a) this reworks irq handling for DP MST ports, so that we can
avoid the mode config locking in the current hpd handlers, as
we need to process up/down msgs at a better time.
Changes since v0.1:
use PORT_PCH_HOTPLUG to detect short vs long pulses
add a workqueue to deal with digital events as they can get blocked on the
main workqueue beyong mode_config mutex
fix a bunch of modeset checker warnings
acks irqs in the driver
cleanup the MST encoders
Changes since v0.2:
check irq status again in work handler
move around bring up and tear down to fix DPMS on/off
use path properties.
Changes since v0.3:
updates for mst apis
more state checker fixes
irq handling improvements
fbcon handling support
improved reference counting of link - fixes redocking.
Changes since v0.4:
handle gpu reset hpd reinit without oopsing
check link status on HPD irqs
fix suspend/resume
Changes since v0.5:
use proper functions to get max link/lane counts
fix another checker backtrace - due to connectors disappearing.
set output type in more places fro, unknown->displayport
don't talk to devices if no HPD asserted
check mst on short irqs only
check link status properly
rebase onto prepping irq changes.
drop unsued force_act
Changes since v0.6:
cleanup unused struct entry.
[airlied: fix some sparse warnings].
Reviewed-by: Todd Previte <tprevite@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
- fbc improvements when stolen memory is tight (Ben)
- cdclk handling improvements for vlv/chv (Ville)
- proper fix for stuck primary planes on gmch platforms with cxsr (Imre&Ebgert
Eich)
- gen8 hw semaphore support (Ben)
- more execlist prep work from Oscar Mateo
- locking fixes for primary planes (Matt Roper)
- code rework to support runtime pm for dpms on hsw/bdw (Paulo, Imre & me), but
not yet enabled because some fixes from Paulo haven't made the cut
- more gpu boost tuning from Chris
- as usual piles of little things all over
* tag 'drm-intel-next-2014-07-11' of git://anongit.freedesktop.org/drm-intel: (93 commits)
drm/i915: Make the RPS interrupt generation mask handle the vlv wa
drm/i915: Move RPS evaluation interval counters to i915->rps
drm/i915: Don't cast a pointer to void* unnecessarily
drm/i915: don't read LVDS regs at compute_config time
drm/i915: check the power domains in intel_lvds_get_hw_state()
drm/i915: check the power domains in ironlake_get_pipe_config()
drm/i915: don't skip shared DPLL assertion on LPT
drm/i915: Only touch WRPLL hw state in enable/disable hooks
drm/i915: Switch to common shared dpll framework for WRPLLs
drm/i915: ->enable hook for WRPLLs
drm/i915: ->disable hook for WRPLLs
drm/i915: State readout support for WRPLLs
drm/i915: add POWER_DOMAIN_PLLS
drm/i915: Document that the pll->mode_set hook is optional
drm/i915: Basic shared dpll support for WRPLLs
drm/i915: Precompute static ddi_pll_sel values in encoders
drm/i915: BDW also has special-purpose DP DDI clocks
drm/i915: State readout and cross-checking for ddi_pll_sel
drm/i915: Move ddi_pll_sel into the pipe config
drm/i915: Add a debugfs file for the shared dpll state
...
- Accurate frontbuffer tracking and frontbuffer rendering invalidate, flush and
flip events. This is prep work for proper PSR support and should also be
useful for DRRS&fbc.
- Runtime suspend hardware on system suspend to support the new SOix sleep
states, from Jesse.
- PSR updates for broadwell (Rodrigo)
- Universal plane support for cursors (Matt Roper), including core drm patches.
- Prefault gtt mappings (Chris)
- baytrail write-enable pte bit support (Akash Goel)
- mmio based flips (Sourab Gupta) instead of blitter ring flips
- interrupt handling race fixes (Oscar Mateo)
And old, not yet merged features from the previous round:
- rps/turbo support for chv (Deepak)
- some other straggling chv patches (Ville)
- proper universal plane conversion for the primary plane (Matt Roper)
- ppgtt on vlv from Jesse
- pile of cleanups, little fixes for insane corner cases and improved debug
support all over
* tag 'drm-intel-next-2014-06-20' of git://anongit.freedesktop.org/drm-intel: (99 commits)
drm/i915: Update DRIVER_DATE to 20140620
drivers/i915: Fix unnoticed failure of init_ring_common()
drm/i915: Track frontbuffer invalidation/flushing
drm/i915: Use new frontbuffer bits to increase pll clock
drm/i915: don't take runtime PM reference around freeze/thaw
drm/i915: use runtime irq suspend/resume in freeze/thaw
drm/i915: Properly track domain of the fbcon fb
drm/i915: Print obj->frontbuffer_bits in debugfs output
drm/i915: Introduce accurate frontbuffer tracking
drm/i915: Drop schedule_back from psr_exit
drm/i915: Ditch intel_edp_psr_update
drm/i915: Drop unecessary complexity from psr_inactivate
drm/i915: Remove ctx->last_ring
drm/i915/chv: Ack interrupts before handling them (CHV)
drm/i915/bdw: Ack interrupts before handling them (GEN8)
drm/i915/vlv: Ack interrupts before handling them (VLV)
drm/i915: Ack interrupts before handling them (GEN5 - GEN7)
drm/i915: Don't BUG_ON in i915_gem_obj_offset
drm/i915: Grab dev->struct_mutex in i915_gem_pageflip_info
drm/i915: Add some L3 registers to the parser whitelist
...
Conflicts:
drivers/gpu/drm/i915/i915_drv.c
To achieve further power savings during system freeze (aka connected
standby, or s0ix) we have to send a PCI_D1 opregion notification. As
the information about the state we're entering (system freeze,
suspend to ram or suspend to disk) is only available through the ACPI
subsystem, make this support depend on the relevant kconfig option.
Things will still work if this option isn't set, albeit with less than
optimial power saving.
This also fixes a compile breakage when the option is not set introduced
in
commit e5747e3adc
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Thu Jun 12 08:35:47 2014 -0700
drm/i915: send proper opregion notifications on suspend/resume
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Some drivers need to be able to have a perfect race-free fbcon setup.
Current drivers only enable hotplug processing after the call to
drm_fb_helper_initial_config which leaves a tiny but important race.
This race is especially noticable on embedded platforms where the
driver itself enables the voltage for the hdmi output, since only then
will monitors (after a bit of delay, as usual) respond by asserting
the hpd pin.
Most of the infrastructure is already there with the split-out
drm_fb_helper_init. And drm_fb_helper_initial_config already has all
the required locking to handle concurrent hpd events since
commit 53f1904bce
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu Mar 20 14:26:35 2014 +0100
drm/fb-helper: improve drm_fb_helper_initial_config locking
The only missing bit is making drm_fb_helper_hotplug_event save
against concurrent calls of drm_fb_helper_initial_config. The only
unprotected bit is the check for fb_helper->fb.
With that drivers can first initialize the fb helper, then enabel
hotplug processing and then set up the initial config all in a
completely race-free manner. Update kerneldoc and convert i915 as a
proof of concept.
Feature requested by Thierry since his tegra driver atm reliably boots
slowly enough to misses the hotplug event for an external hdmi screen,
but also reliably boots to quickly for the hpd pin to be asserted when
the fb helper calls into the hdmi ->detect function.
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
It is possible that, by the time we run i915_drm_freeze(),
delayed_resume_work was already queued but did not run yet. If it
still didn't run after intel_runtime_pm_disable_interrupts(), by the
time it runs it will try to change the interrupt registers with the
interrupts already disabled, which will trigger a WARN. We can
reliably reproduce this with the pm_rpm system-suspend test case.
In order to avoid the problem, we have to flush the work before
disabling the interrupts. We could also cancel the work instead of
flushing it, but that would require us to put a runtime PM reference -
and any other resource we may need in the future - in case the work
was already queued, so I believe flushing the work is more
future-proof, although less efficient. But I can also change this part
if someone requests.
Another thing I tried was to move the intel_suspend_gt_powersave()
call to before intel_runtime_pm_disable_interrupts(), but since that
function needs to be called after the interrupts are already disabled,
due to dev_priv->rps.work, this strategy didn't work.
Testcase: igt/pm_rpm/system-suspend
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80517
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
We should be taking the right power well refs these days, so this
shouldn't be necessary. It also gets in the way of re-using these
routines for S0iX states, as those need all the power saving features
enabled.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
We don't need to uninstall the full handler, simply disabling interrupts
ought to be enough.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Jesse's SOix work required some patches from acpi-next, so pull it in
through a topic barnch.
Conflicts:
drivers/gpu/drm/i915/i915_drv.c
drivers/gpu/drm/i915/intel_pm.c
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Atm, the forcewake refcount will be incorrectly set to zero during
system suspend if there is any reference held via the
i915_forcewake_user debugfs entry.
Fix this by simply not zeroing the sw counters during suspend and
restoring the original state using them. Note that the only other
places where we zeroed the counters were driver load and unload time,
where it was redundant anyway.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78059
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This matches the runtime suspend paths and allows the system to enter
the lowest power mode at freeze time.
v2: move disable_pc8 call to thaw_early (Imre)
move enable_pc8 to freeze_late (Imre/Jesse)
v3: drop spurious hunk from _freeze now that we have freeze_late (Jesse)
v4: move back to suspend_late (Imre was right)
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This indicates to the firmware that it can power down various other
components or bring them back up, depending on the target system state.
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This allows the system to enter the lowest power mode during system freeze.
v2: delete force wake timer at suspend (Imre)
v3: add GT work suspend function (Imre)
v4: use uncore forcewake reset (Daniel)
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
We want to make sure everything is disabled and at its lowest power when
freezing.
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
These are just single registers so wasting space for the pipe offsets
seems a bit pointless. So just use the _PIPE3() macro instead.
Also rewrite the _PIPE3() macro to be more obvious, and protect the
arguments properly.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
[danvet: Frob conflict.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
BDW uses IVB cursor offsets.
Whithout this patch it is not possible to use multiple outputs with cursor
on BDW.
The cursor gets completely crazy because update position uses the wrong
cursor register for the second pipe.
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Cc: stable@vger.kernel.org
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79621
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
If both KMS is disabled (by i915.modeset=0 or nomodeset parameters) and
UMS is disabled (by CONFIG_DRM_I915_UMS=n, the default), the user might
not be aware his setup is not supported. Inform the users (and, by
extension, the poor i915 developers having to read their dmesgs in bug
reports) why their graphics experience might be lacking.
A similar message was added on the UMS path in
commit e147accbd1
Author: Jani Nikula <jani.nikula@intel.com>
Date: Thu Oct 10 15:25:37 2013 +0300
drm/i915: tell the user KMS is required for gen6+
but it won't be reached if CONFIG_DRM_I915_UMS=n since
commit b30324adaf
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Wed Nov 13 22:11:25 2013 +0100
drm/i915: Deprecated UMS support
v2: Use DRM_DEBUG_DRIVER.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Currently we do a full re-init of all interrupts after a gpu hang.
Which is pretty bad since we don't restore the interrupts we've
enabled at runtime correctly. Even with that addressed it's rather
horribly race.
But on g4x and later we only reset the gt and not the entire gpu.
Which means we only need to reset the GT interrupt bits. Which has the
nice benefit that vblank waits, pipe CRC interrupts and everything
else display related just keeps on working.
The downside is that gt interrupt handling (i.e. ring->get/put_irq) is
still racy. But as long as the gpu hang reliably wakes all waters and
we have a short time where the refcount drops to 0 we'll recover. So
not that bad really.
v2: Ville noticed that GTIMR and PMIMR don't get cleared, only the
subordinate per-ring registers. So let's rip out all the interrupt dancing.
The FIXME comment is still required though since the ring irq handling
happens at the per-ring interrupt mask registers, too.
Testcase: igt/kms_flip/vblank-vs-hang
Testcase: igt/kms_pipe_crc_basic/hang-*
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>
After the split-out of crtc locks from the big mode_config.mutex
there's still two major areas it protects:
- Various connector probe states, like connector->status, EDID
properties, probed mode lists and similar information.
- The links from connector->encoder and encoder->crtc and other
modeset-relevant connector state (e.g. properties which control the
panel fitter).
The later is used by modeset operations. But they don't really care
about the former since it's allowed to e.g. enable a disconnected VGA
output or with a mode not in the probed list.
Thus far this hasn't been a problem, but for the atomic modeset
conversion Rob Clark needs to convert all modeset relevant locks into
w/w locks. This is required because the order of acquisition is
determined by how userspace supplies the atomic modeset data. This has
run into troubles in the detect path since the i915 load detect code
needs _both_ protections offered by the mode_config.mutex: It updates
probe state and it needs to change the modeset configuration to enable
the temporary load detect pipe.
The big deal here is that for the probe/detect users of this lock a
plain mutex fits best, but for atomic modesets we really want a w/w
mutex. To fix this lets split out a new connection_mutex lock for the
modeset relevant parts.
For simplicity I've decided to only add one additional lock for all
connector/encoder links and modeset configuration states. We have
piles of different modeset objects in addition to those (like bridges
or panels), so adding per-object locks would be much more effort.
Also, we're guaranteed (at least for now) to do a full modeset if we
need to acquire this lock. Which means that fine-grained locking is
fairly irrelevant compared to the amount of time the full modeset will
take.
I've done a full audit, and there's just a few things that justify
special focus:
- Locking in drm_sysfs.c is almost completely absent. We should
sprinkle mode_config.connection_mutex over this file a bit, but
since it already lacks mode_config.mutex this patch wont make the
situation any worse. This is material for a follow-up patch.
- omap has a omap_framebuffer_flush function which walks the
connector->encoder->crtc links and is called from many contexts.
Some look like they don't acquire mode_config.mutex, so this is
already racy. Again fixing this is material for a separate patch.
- The radeon hot_plug function to retrain DP links looks at
connector->dpms. Currently this happens without any locking, so is
already racy. I think radeon_hotplug_work_func should gain
mutex_lock/unlock calls for the mode_config.connection_mutex.
- Same applies to i915's intel_dp_hot_plug. But again, this is already
racy.
- i915 load_detect code needs to acquire this lock. Which means the
w/w dance due to Rob's work will be nicely contained to _just_ this
function.
I've added fixme comments everywhere where it looks suspicious but in
the sysfs code. After a quick irc discussion with Dave Airlie it
sounds like the lack of locking in there is due to sysfs cleanup fun
at module unload.
v1: original (only compile tested)
v2: missing mutex_init(), etc (from Rob Clark)
v3: i915 needs more care in the conversion:
- Protect the edp pp logic with the connection_mutex.
- Use connection_mutex in the backlight code due to
get_pipe_from_connector.
- Use drm_modeset_lock_all in suspend/resume paths.
- Update lock checks in the overlay code.
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Atm, we disable GT power saving during the end of the suspend sequence
in i915_save_state(). Doing the disabling at that point seems arbitrary.
One reason to disable it early though is to have a quiescent HW state
before we do anything else (for example save registers). So move the
disabling earlier, which also takes care canceling of the deferred RPS
enabling work done by intel_disable_gt_powersave().
Note that after the move we'll call intel_disable_gt_powersave() only
in case modeset is enabled, but that's anyway the only case where we
have it enabled in the first place.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Robert Beckett <robert.beckett@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Currently user space can access GEM buffers mapped to GTT through
existing mappings concurrently while the platform specific suspend
handlers are running. Since these handlers may change the HW state in a
way that would break such accesses, remove the mappings before calling
the handlers. Spotted by Ville.
Also Chris pointed out that the lists that i915_gem_release_all_mmaps()
walks through need dev->struct_mutex, so take this lock. There is a
potential deadlock against a concurrent RPM resume, resolve this by
aborting and rescheduling the suspend (Daniel).
v2:
- take struct_mutex around i915_gem_release_all_mmaps() (Chris, Daniel)
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Robert Beckett <robert.beckett@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Daniel keeps on ramping up the warning level of the DRM and our display
core to make it complain whenever the locking rules are not followed.
This caught
commit 24576d2397
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Tue Mar 26 09:25:45 2013 -0700
drm/i915: enable VT switchless resume v3
introducing an unlocked access to the CRTC whilst disabling it for
suspend.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78114
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
We really just want to go detect displays again and fire off a hotplug
event if things have changed, not go through full hotplug processing.
Requested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
CHV has three pipes so let's expose them all.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Antti Koskipää <antti.koskipaa@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Unsurprisingly the cursor C regiters are also at a weird offset on CHV.
Add more pipe offsets to handle them.
This also gets rid of most of the differences between the i9xx vs. ivb
cursor code. We can unify the remaining code as well, but I'll leave
that for another patch.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Antti Koskipää <antti.koskipaa@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Add support for the third pipe in cherrview
v2: Don't use spaces for indentation (Jani)
Wrap long lines
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Rafael Barbalho <rafael.barbalho@intel.com>
[vsyrjala: slightly massaged the patch]
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Patch done using the following semantic patch (thanks Daniel for the
help!)
@@
iterator name list_for_each_entry;
iterator name for_each_crtc;
struct drm_crtc * crtc;
struct drm_device * dev;
@@
-list_for_each_entry(crtc,&dev->mode_config.crtc_list, head) {
+for_each_crtc(dev,crtc) {
...
}
Followed by a couple of fixups by hand (that spatch doesn't match the
cases where list_for_each_entry() is not followed by a set of '{', '}',
but I couldn't figure out a way to leave the '{' out of the iterator
match).
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
v2: Update to also fill in the new num_pipes field.
v3: Rebase on top of the pciid extraction.
v4: Switch from info->has*ring to info->ring mask. Also add VEBOX support whiel
at it.
v5: s/CHV_PCI_IDS/CHV_IDS/, and drop the trailing '\'
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Add runtime PM support for VLV, but leave it disabled. The next patch
enables it.
The suspend/resume sequence used is based on [1] and [2]. In practice we
depend on the GT RC6 mechanism to save the HW context depending on the
render and media power wells. By the time we run the runtime suspend
callback the display side is also off and the HW context for that is
managed by the display power domain framework.
Besides the above there are Gunit registers that depend on a system-wide
power well. This power well goes off once the device enters any of the
S0i[R123] states. To handle this scenario, save/restore these Gunit
registers. Note that this is not the complete register set dictated by
[2], to remove some overhead, registers that are known not to be used are
ignored. Also some registers are fully setup by initialization functions
called during resume, these are not saved either. The list of registers
can be further reduced, see the TODO note in the code.
[1] VLV_gfx_clocking_PM_reset_y12w21d3 / "Driver D3 entry/exit"
[2] VLV2_S0IXRegs
v2:
- unchanged
v3:
- fix s/GEN6_PMIIR/GEN6_PMIMR/ typo when saving/restoring registers
(Ville)
v4:
- rebased on the previous patch fixing GEN register prefixes
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[ rebased (according to v4) ]
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Atm, none of the RPM callbacks can fail, but the next patch adding
RPM support for VLV changes this, so prepare for it.
In case one of these callbacks return error RPM will get permanently
disabled until the error is explicitly cleared. In the future we could
add support for re-enabling it, for example after resetting the HW, but
for now - hopefully - we can live with the simpler solution.
v2:
- propagate the error from the resume callbacks too (Paulo)
v3:
- fix rebase fail typo around IS_GEN6() check in intel_runtime_suspend()
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
I've seen latencies up to 15msec, so increase the timeout to 20msec.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This will be needed by the VLV runtime PM helpers too, so factor it out.
Also add a safety check for the case where the previous force-off is
still pending, since I'm not sure if Punit can handle a new setting
while the previous one hasn't settled yet.
v2:
- unchanged
v3:
- add a note to the commit message about the safety check (Ville)
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
During runtime suspend there can be a last pending rps.work, so make
sure it's canceled. Note that in the runtime suspend callback we can't
get any RPS interrupts since it's called only after the GPU goes idle
and we set the minimum RPS frequency. The next possibility for an RPS
interrupt is only after getting an RPM ref (for example because of a new
GPU command) and calling the RPM resume callback.
v2:
- patch introduced in v2 of the patchset
v3:
- Change the order of canceling the rps.work and disabling interrupts to
avoid the race between interrupt disabling and the the rps.work. Race
spotted by Ville.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
We need to re-init sizzling on all platforms so move it to the
platform independent runtime resume callback. The ring frequency reinit
is also needed everywhere except on VLV, but gen6_update_ring_freq()
will be a noop on VLV, so we can move this function too to platform
independent code.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This is needed by the next patch moving the call out from platform
specific RPM callbacks to platform independent code.
No functional change.
v2:
- patch introduce in v2 of the patchset
v3:
- simplify platform check condition (Ville)
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
We need to disable the interrupts for all platforms, so make the helpers
for this platform independent and call them from them platform
independent runtime suspend/resume callbacks.
On HSW/BDW this will move interrupt disabling/re-enabling at the
beginning/end of runtime suspend/resume respectively, but I don't see
any reason why this would cause a problem there. In any case this seems
to be the correct thing to do even on those platforms.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
On VLV we depend on RC6 to save the GT render and media HW context
before going to the D3 state via RPM, so as a preparation for the
VLV RPM support (added in an upcoming patch) disable RPM if RC6 is
disabled.
There is probably a similar dependency on other platforms too, so for
safety require RC6 for those too. For these platforms (SNB, HSW, BDW)
this is then a possible fix.
v2:
- require RC6 for all RPM platforms, not just for VLV (Paulo, Daniel)
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
At least on VLV but probably on other platforms too we depend on RC6
being enabled for RPM, so disable RPM until the delayed RC6 enabling
completes.
v2:
- explain the reason for the _noresume version of RPM get (Daniel)
- use the simpler 'if (schedule_work()) rpm_get();' instead of
'if (!cancel_work_sync()) rpm_get(); schedule_work();'
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Getting struct_mutex around the whole intel_enable_gt_powersave()
function is not necessary, since it's only needed for the ILK path
therein.
This will make intel_enable_gt_powersave() useable on the RPM resume
path for >=GEN6 (added in an upcoming patch to reset the RPS state
during RPM resume), where we can't (and need not) get this mutex.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Based on the hardware spec, the BDW GT3 machine has two independent
BSD ring that can be used to dispatch the video commands.
So just initialize it.
V3->V4: Follow Imre's comment to do some minor updates. For example:
more comments are added to describe the semaphore between ring.
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
[danvet: Fix up checkpatch error.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Based on the hardware spec, the BDW GT3 has the different configuration
with the BDW GT1/GT2. So split the BDW device info definition.
This is to do the preparation for adding the Dual BSD rings on BDW GT3 machine.
V1->V2: Follow Daniel's comment to pay attention to the stolen check for BDW
in kernel/early-quirks.c
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
During module load, if we fail to initialise the rings, we abort the
load reporting EIO. However during resume, even though we report EIO as
we fail to reinitialize the ringbuffers, the resume continues and the
device is restored - albeit in a non-functional state. As we cannot
execute any commands on the GPU, it is effectively wedged, mark it so.
As we now preserve the ringbuffers across resume, this should prevent
UXA from falling into the trap of repeatedly sending invalid
batchbuffers and dropping all further rendering into /dev/null.
Reported-and-tested-by: Jiri Kosina <jkosina@suse.cz>
References: https://bugs.freedesktop.org/show_bug.cgi?id=76554
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
[danvet: Drop unused error, spotted by Oscar.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Next pull request, this time more of the drm de-midlayering work. The big
thing is that his patch series here removes everything from drm_bus except
the set_busid callback. Thierry has a few more patches on top of this to
make that one optional to.
With that we can ditch all the non-pci drm_bus implementations, which
Thierry has already done for the fake tegra host1x drm_bus.
Reviewed by Thierry, Laurent and David and now also survived some testing
on my intel boxes to make sure the irq fumble is fixed correctly ;-) The
last minute rebase was just to add the r-b tags from Thierry for the 2
patches I've redone.
* 'drm-init-cleanup' of git://people.freedesktop.org/~danvet/drm:
drm/<drivers>: don't set driver->dev_priv_size to 0
drm: Remove dev->kdriver
drm: remove drm_bus->get_name
drm: rip out dev->devname
drm: inline drm_pci_set_unique
drm: remove bus->get_irq implementations
drm: pass the irq explicitly to drm_irq_install
drm/irq: Look up the pci irq directly in the drm_control ioctl
drm/irq: track the irq installed in drm_irq_install in dev->irq
drm: rename dev->count_lock to dev->buf_lock
drm: Rip out totally bogus vga_switcheroo->can_switch locking
drm: kill drm_bus->bus_type
drm: remove drm_dev_to_irq from drivers
drm/irq: remove cargo-culted locking from irq_install/uninstall
drm/irq: drm_control is a legacy ioctl, so pci devices only
drm/pci: fold in irq_by_busid support
drm/irq: simplify irq checks in drm_wait_vblank
Unfortunately this requires a drm-wide change, and I didn't see a sane
way around that. Luckily it's fairly simple, we just need to inline
the respective get_irq implementation from either drm_pci.c or
drm_platform.c.
With that we can now also remove drm_dev_to_irq from drm_irq.c.
Reviewed-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
The dev->struct_mutex locking in drm_irq.c only protects
dev->irq_enabled. Which isn't really much at all and only prevents
especially nasty ums userspace from concurrently installing the
interrupt handling a few times. Or at least trying.
There are tons of unlocked readers of dev->irqs_enabled in the vblank
wait code (and by extension also in the pageflip code since that uses
the same vblank timestamp engine).
Real modesetting drivers should ensure that nothing can go haywire
with a sane setup teardown sequence. So we only really need this for
the drm_control ioctl, everywhere else this will just paper over
nastiness.
Note that drm/i915 is a bit specially due to the gem+ums combination.
So there we also need to properly protect the entervt and leavevt
ioctls. But it's definitely saner to do everything in one go than to
drop the lock in-between.
Finally there's the gpu reset code in drm/i915. That one's just race
(concurrent userspace calls to for vblank waits of pageflips could
spuriously fail). So wrap it up in with a nice comment since fixing
this is more involved.
v2: Rebase and fix commit message (Thierry)
Reviewed-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Backmerge drm-next after the big s/crtc->fb/crtc->primary->fb/
cocinelle patch to avoid endless amounts of conflict hilarity in my
-next queue for 3.16.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
During resume the intel hda audio driver depends on the i915 driver
reinitializing the audio power domain. Since the order of calling the
i915 resume handler wrt. that of the audio driver is not guaranteed,
move the power domain reinitialization step to the resume_early
handler. This is guaranteed to run before the resume handler of any
other driver.
The power domain initialization in turn requires us to enable the i915
pci device first, so move that part earlier too.
Accordingly disabling of the i915 pci device should happen after the
audio suspend handler ran. So move the disabling later from the i915
resume handler to the resume_late handler.
v2:
- move intel_uncore_sanitize/early_sanitize earlier too, so they don't
get reordered wrt. intel_power_domains_init_hw()
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76152
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Cc: stable@vger.kernel.org
[danvet: Add cc: stable and loud comments that this is just a hack.]
[danvet: Fix "Should it be static?" sparse warning reported by Wu
Fengguang's kbuilder.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This sould be enough.
v2: BDW should also run hsw_runtime_resume (Ben).
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Now that PC8 is part of runtime PM, the check is useless.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Just because I have a SNB machine and I can easily test it.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
We're adding runtime suspend support to more platforms, so organize
the code in a way that all a new platform needs to do is to add its
own gen-specific functions. Also rename the i915_ functions to intel_
to make it clear that it's the top level one, not something that just
runs on i915 platforms.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Remove the rest of the references to drm_i915_private_t. No functional
changes.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
[danvet: Drop hunk in i915_cmd_parser.c]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
After we removed all the intermediate abstractions, we can rename
these functions to just hsw_{en,dis}able_pc8.
v2: - Rebase.
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
We already get runtime PM references, and PC8 is now part of runtime
PM, so this is enough.
v2: - Rebase.
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Currently, when our driver becomes idle for i915.pc8_timeout (default:
5s) we enable PC8, so we save some power, but not everything we can.
Then, while PC8 is enabled, if we stay idle for more
autosuspend_delay_ms (default: 10s) we'll enter runtime PM and put the
graphics device in D3 state, saving even more power. The two features
are separate things with increasing levels of power savings, but if we
disable PC8 we'll never get into D3.
While from the modularity point of view it would be nice to keep these
features as separate, we have reasons to merge them:
- We are not aware of anybody wanting a "PC8 without D3" environment.
- If we keep both features as separate, we'll have to to test both
PC8 and PC8+D3 code paths. We're already having a major pain to
make QA do automated testing of just one thing, testing both paths
will cost even more.
- Only Haswell+ supports PC8, so if we want to add runtime PM support
to, for example, IVB, we'll have to copy some code from the PC8
feature to runtime PM, so merging both features as a single thing
will make it easier for enabling runtime PM on other platforms.
This patch only does the very basic steps required to have PC8 and
runtime PM merged on a single feature: the next patches will take care
of cleaning up everything.
v2: - Rebase.
v3: - Rebase.
- Fully remove the deprecated i915 params since Daniel doesn't
consider them as part of the ABI.
v4: - Rebase.
- Fix typo in the commit message.
v5: - Rebase, again.
- Add a huge comment explaining the different forcewake usage
(Chris, Daniel).
- Use open-coded forcewake functions (Daniel).
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Now that we regularly defer the forcewake dance to a timer func, it is
likely to fire after we disable the device during suspend. This
generates an oops as we detect inconsistency in the hardware state. So
before suspend, we want to complete the outstanding dance and generally
sanitize the registers before handing back to the BIOS.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Merge tag 'v3.14-rc6' into drm-intel-next-queued
Linux 3.14-rc6
I need the hdmi/dvi-dual link fixes in 3.14 to avoid ugly conflicts
when merging Ville's new hdmi cloning support into my -next tree
Conflicts:
drivers/gpu/drm/i915/Makefile
drivers/gpu/drm/i915/intel_dp.c
Makefile cleanup conflicts with an acpi build fix, intel_dp.c is
trivial.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
BDW is no longer flagged as preliminary hw, but without
i915.preliminary_hw_support module param set the logs are filled with
WARNs about it.
Just make semaphores off the BDW per-chip default for now.
CC: Ben Widawsky <ben@bwidawsk.net>
Reported-by: Sebastien Dufour <sebastien.dufour@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
For example if we get bug reports with similar error states and
suspend count is always 1, that might lead the Sherlocks to
right general direction.
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Just to be sure...
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This got lost when we shuffled around our internal branch and
GEN7_FEATURES macro. There were no HW changes to support FBC, so we just
need to set the flag.
v2: Don't allow FBC for any pipe but A on platforms with DDI. (Paulo)
Cc: Daisy Sun <daisy.sun@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
The power domains framework is internal to the i915 driver, so pass
drm_i915_private instead of drm_device to its functions.
Also remove a dangling intel_set_power_well() declaration.
No functional change.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
A check of rps/rc6 state after i915_reset determined that the ring
MAX_IDLE registers were returned to their hardware defaults and that
the GEN6_PMIMR register was set to mask all interrupts. This change
restores those values to their pre-reset states by re-initializing
rps/rc6 in i915_reset. A full re-initialization was opted for versus
a targeted set of restore operations for simplicity and maintain-
ability. Note that the re-initialization is not done for Ironlake,
due to a past comment that it causes problems.
Also updated the rps initialization sequence to preserve existing
min/max values in the case of a re-init. We assume the values were
validated upon being set and do not do further range checking. The
debugfs interface for changing min/max was updated with range
checking to ensure this condition (already present in sysfs
interface).
v2: fix rps logging to output hw_max and hw_min, not rps.max_delay
and rps.min_delay which don't strictly represent hardware limits.
Add igt testcase to signed-off-by section.
Testcase: igt/pm_rps/reset
Signed-off-by: Jeff McGee <jeff.mcgee@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
RFCv2: Reorganize array indexing so that full offsets can be used as
is. It makes grepping for registers in i915_reg.h much easier. Also
move offset arrays to intel_device_info.
v1: Fixed offsets for VLV, proper eDP handling
v2: Fixed BCLRPAT, PIPESRC, PIPECONF and DSP* macros.
v3: Added EDP pipe comment, removed redundant offset arrays for
MSA_MISC and DDI_FUNC_CTL.
v4: Rename patch and report object size increase.
v5: Change location of commas, add PIPE_EDP into enum pipe
v6: Insert PIPE_EDP_OFFSET into pipe offset array
v7: Set I915_MAX_PIPES back to 3, change more registers accessors
to use the new macros, get rid of _PIPE_INC and add dev_priv
as a parameter where required by the new macros.
Upcoming hardware will not have the various display pipe register
ranges evenly spaced in memory. Change register address calculations
into array lookups.
Tested on SNB, VLV, IVB, Gen2 and HSW w/eDP.
I left the UMS cruft untouched.
Size differences:
text data bss dec hex filename
596431 4634 56 601121 92c21 i915.ko (new)
593199 4634 56 597889 91f81 i915.ko (old)
Signed-off-by: Antti Koskipaa <antti.koskipaa@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
With 20+ module parameters, I think referring to them via a struct
improves clarity over just having a bunch of globals. While at it, move
the parameter initialization and definitions into a new file
i915_params.c to reduce clutter in i915_drv.c.
Apart from the ill-named i915_enable_rc6, i915_enable_fbc and
i915_enable_ppgtt parameters, for which we lose the "i915_" prefix
internally, the module parameters now look the same both on the kernel
command line and in code. For example, "i915.modeset".
The downsides of the change are losing static on a couple of variables
and not having the initialization and module_param_named() right next to
each other. On the other hand, all module parameters are now defined in
one place at i915_params.c. Plus you can do this to find all module
parameter references:
$ git grep "i915\." -- drivers/gpu/drm/i915
v2:
- move the definitions into a new file
- s/i915_params/i915/
- make i915_try_reset i915.reset, for consistency
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Because whatever.*
* This should contain a fairly long list of issues and still
unresolved resgressions, but I didn't really get a vote.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
It's unused, and nowadays specifying unknown parameters no longer
prevents modules from being loaded.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Currently we're doing the reset handling a bit late, and we're doing
it both in the driver load code and on resume. This makes it unusable
for e.g. resetting the panel power sequence state like Paulo wants to.
Instead of adding yet another single-use callback shuffle things
around:
- Output handling code is responsible to reset/init all state on its
own at driver load time.
- We call the reset functions much earlier, before we start using any
of the modeset code.
Compared to Paulo's new ->resume callback the only difference in
placement is that ->reset is still called without dev->struct_mutex
held. Which is imo a feature.
v2: Rebase on top of the now merge dinq.
Cc: Paulo Zanoni <przanoni@gmail.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
The opregion notification for runtime suspend is currently D1, not D3.
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
It ought to work ok in 3.14. We have some fun stuff coming after that,
but all the basics are in place now and seem relatively stable.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
A couple patches in the upcoming rework of semaphores will break if
semaphores are toggled by the user at various times. Since the code
cleanups there seem to be an overall win, and toggling semaphores at
runtime is not a terribly useful thing to do, simply make the module
parameter read-only.
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
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>
drm-intel-next-2014-01-10:
- final bits for runtime D3 on Haswell from Paul (now enabled fully)
- parse the backlight modulation freq information in the VBT from Jani
(but not yet used)
- more watermark improvements from Ville for ilk-ivb and bdw
- bugfixes for fastboot from Jesse
- watermark fix for i830M (but not yet everything)
- vlv vga hotplug w/a (Imre)
- piles of other small improvements, cleanups and fixes all over
Note that the pull request includes a backmerge of the last drm-fixes
pulled into Linus' tree - things where getting a bit too messy. So the
shortlog also contains a bunch of patches from Linus tree. Please yell if
you want me to frob it for you a bit.
* 'drm-intel-next' of git://people.freedesktop.org/~danvet/drm-intel: (609 commits)
drm/i915/bdw: make sure south port interrupts are enabled properly v2
drm/i915: Include more information in disabled hotplug interrupt warning
drm/i915: Only complain about a rogue hotplug IRQ after disabling
drm/i915: Only WARN about a stuck hotplug irq ONCE
drm/i915: s/hotplugt_status_gen4/hotplug_status_g4x/
Conflicts are getting out of hand, and now we have to shuffle even
more in -next which was also shuffled in -fixes (the call for
drm_mode_config_reset needs to move yet again).
So do a proper backmerge. I wanted to wait with this for the 3.13
relaese, but alas let's just do this now.
Conflicts:
drivers/gpu/drm/i915/i915_reg.h
drivers/gpu/drm/i915/intel_ddi.c
drivers/gpu/drm/i915/intel_display.c
drivers/gpu/drm/i915/intel_pm.c
Besides the conflict around the forcewake get/put (where we chaged the
called function in -fixes and added a new parameter in -next) code all
the current conflicts are of the adjacent lines changed type.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
- fbc1 improvements from Ville (pre-gm45).
- vlv forcewake improvements from Deepak S.
- Some corner-cases fixes from Mika for the context hang stat code.
- pc8 improvements and prep work for runtime D3 from Paulo, almost ready for
primetime.
- gen2 dpll fixes from Ville.
- DSI improvements from Shobhit Kumar.
- A few smaller fixes and improvements all over.
[airlied: intel_ddi.c conflict fixed up]
* tag 'drm-intel-next-2013-12-13' of git://people.freedesktop.org/~danvet/drm-intel: (61 commits)
drm/i915/bdw: Implement ff workarounds
drm/i915/bdw: Force all Data Cache Data Port access to be Non-Coherent
drm/i915/bdw: Don't use forcewake needlessly
drm/i915: Clear out old GT FIFO errors in intel_uncore_early_sanitize()
drm/i915: dont call irq_put when irq test is on
drm/i915: Rework the FBC interval/stall stuff a bit
drm/i915: Enable FBC for all mobile gen2 and gen3 platforms
drm/i915: FBC_CONTROL2 is gen4 only
drm/i915: Gen2 FBC1 CFB pitch wants 32B units
drm/i915: split intel_ddi_pll_mode_set in 2 pieces
drm/i915: Fix timeout with missed interrupts in __wait_seqno
drm/i915: touch VGA MSR after we enable the power well
drm/i915: extract hsw_power_well_post_{enable, disable}
drm/i915: remove i915_disable_vga_mem declaration
drm/i915: Parametrize the dphy and other spec specific parameters
drm/i915: Remove redundant DSI PLL enabling
drm/i915: Reorganize the DSI enable/disable sequence
drm/i915: Try harder to get best m, n, p values with minimal error
drm/i915: Compute dsi_clk from pixel clock
drm/i915: Use FLISDSI interface for band gap reset
...
Conflicts:
drivers/gpu/drm/i915/intel_ddi.c
As with processes which run on the CPU, the goal of multiple VMs is to
provide process isolation. Specific to GEN, there is also the ability to
map more objects per process (2GB each instead of 2Gb-2k total).
For the most part, all the pipes have been laid, and all we need to do
is remove asserts and actually start changing address spaces with the
context switch. Since prior to this we've converted the setting of the
page tables to a streamed version, this is quite easy.
One important thing to point out (since it'd been hotly contested) is
that with this patch, every context created will have it's own address
space (provided the HW can do it).
v2: Disable BDW on rebase
NOTE: I tried to make this commit as small as possible. I needed one
place where I could "turn everything on" and that is here. It could be
split into finer commits, but I didn't really see much point.
Cc: Eric Anholt <eric@anholt.net>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
I need the tricky do_switch fix before I can merge the final piece of
the ppgtt enabling puzzle. Otherwise the conflict will be a real pain
to resolve since the do_switch hunk from -fixes must be placed at the
exact right place within a hunk in the next patch.
Conflicts:
drivers/gpu/drm/i915/i915_gem_context.c
drivers/gpu/drm/i915/i915_gem_execbuffer.c
drivers/gpu/drm/i915/intel_display.c
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Only the two intel drivers need this and they can easily check for
working agp support in their driver ->load callbacks.
This is the only reason why agp initialization could fail, so allows
us to rip out a bit of error handling code in the next patch.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
- some more ppgtt prep patches from Ben
- a few fbc fixes from Ville
- power well rework from Imre
- vlv forcewake improvements from Deepak S, Ville and Jesse
- a few smaller things all over
[airlied: fixup forwcewake conflict]
* tag 'drm-intel-next-2013-11-29' of git://people.freedesktop.org/~danvet/drm-intel: (97 commits)
drm/i915: Fix port name in vlv_wait_port_ready() timeout warning
drm/i915: Return a drm_mode_status enum in the mode_valid vfuncs
drm/i915: add intel_display_power_enabled_sw() for use in atomic ctx
drm/i915: drop DRM_ERROR in intel_fbdev init
drm/i915/vlv: use parallel context restore when coming out of RC6
drm/i915/vlv: use a lower RC6 timeout on VLV
drm/i915/sdvo: Fix up debug output to not split lines
drm/i915: make sparse happy for the new vlv mmio read function
drm/i915: drop the right force-wake engine in the vlv mmio funcs
drm/i915: Fix GT wake FIFO free entries for VLV
drm/i915: Report all GTFIFODBG errors
drm/i915: Enabling DebugFS for valleyview forcewake counts
drm/i915/vlv: Valleyview support for forcewake Individual power wells.
drm/i915: Add power well arguments to force wake routines.
drm/i915: Do not attempt to re-enable an unconnected primary plane
drm/i915: add a debugfs entry for power domain info
drm/i915: add a default always-on power well
drm/i915: don't do BDW/HSW specific powerdomains init on other platforms
drm/i915: protect HSW power well check with IS_HASWELL in redisable_vga
drm/i915: use IS_HASWELL/BROADWELL instead of HAS_POWER_WELL
...
Conflicts:
drivers/gpu/drm/i915/intel_display.c
Noticed while reviewing a patch and couldn't resist the OCD.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
So we'll get a fault when someone tries to access the mmap, then we'll
wake up from D3.
v2: - Rebase
v3: - Use gtt active/inactive
Testcase: igt/pm_pc8/gem-mmap-gtt
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
[danvet: Add comment + WARN as discussed with Paulo on irc.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
The hangcheck function requires the hardware to be working, and if
we're suspending we're going to put the HW in D3 state.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
All mobile gen2 and gen3 chipsets should have FBC1, and the code
should now handle them all. So just set has_fbc=true for all such
chipsets.
Note that fbc is still disabled by default for now.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Now that we are actually setting the device to the D3 state, we should
issue the notification.
The opregion spec says we should send the message before the adapter
is about to be placed in a lower power state, and after the adapter is
placed in a higher power state.
Jani originally wrote a similar patch for PC8, but then we discovered
that we were not really changing the PCI D states when
enabling/disabling PC8, so we had to postpone his patch.
v2: - Improve commit message, explaining the expected state.
v3: - Rebase.
Cc: Jani Nikula <jani.nikula@intel.com>
Credits-to: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com> (v2)
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This patch adds the initial infrastructure to allow a Runtime PM
implementation that sets the device to its D3 state. The patch just
adds the necessary callbacks and the initial infrastructure.
We still don't have any platform that actually uses this
infrastructure, we still don't call get/put in all the places we need
to, and we don't have any function to save/restore the state of the
registers. This is not a problem since no platform uses the code added
by this patch. We have a few people simultaneously working on runtime
PM, so this initial code could help everybody make their plans.
V2: - Move some functions to intel_pm.c
- Remove useless pm_runtime_allow() call at init
- Remove useless pm_runtime_mark_last_busy() call at get
- Use pm_runtime_get_sync() instead of 2 calls
- Add a WARN to check if we're really awake
V3: - Rebase.
V4: - Don't need to call pci_{save,restore}_state and
pci_set_power_sate, since they're already called by the PCI
layer
- Remove wrong pm_runtime_enable() call at init_runtime_pm
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
We call intel_modeset_setup_hw_state() along two paths, driver
load/resume and after a lid event notification. During initialisation of
the driver, it is imperative that we reset the config state. This
correctly sets up the initial connector statuses and prepares the
hardware for a thorough probing. However, during a lid event, we only
want to undo the damage caused by the bios by resetting our last known
mode. In this cirumstance, we do not want to clobber our desired state.
In order to try and keep sanity between the config state and our own
tracking, do the drm_mode_config_reset() first along the load/resume
paths before reading out the hw state and apply any definite known
corrections.
v2: "As discussed on irc I don't think we should force the connector
state to anything here: Imo connector->status should reflect what we
believe to be the true output connection state, whereas connector->encoder
reflects whether this connector is wired up to a pipe. And since we no
longer reject modeset on disconnected connectors and never nuked the pipe
if the connector gets disconnected there's no reason for that - such policy
is userspace's job.
This regression has been introduced in
commit 2e9388923e
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu Oct 11 20:08:24 2012 +0200
drm/i915/crt: explicitly set up HOTPLUG_BITS on resume"
so sayeth Daniel.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: stable@vger.kernel.org (v3.8 and later)
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This is just a theoretical issue, but we need to do this to prevent the
WARN in pipe_from_connector at suspend time.
This regression has been introduce in
commit 7bd688cd66
Author: Jani Nikula <jani.nikula@intel.com>
Date: Fri Nov 8 16:48:56 2013 +0200
drm/i915: handle backlight through chip specific functions
https://bugs.freedesktop.org/show_bug.cgi?id=71978
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This would have never worked.
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
