Oneshot disabling of IPS when CRC capturing is started is insufficient.
IPS may get re-enabled by any plane update, and hence tests that keep
CRC capturing on across plane updates will start to see inconsistent
results as soon as IPS kicks back in. Add a new knob into the crtc state
to make sure IPS stays disabled as long as CRC capturing is enabled.
Forcing a modeset is the easiest way to handle this since that's already
how we do the panel fitter workaround. It's a little heavy handed just
for IPS, but seeing as we might already do the panel fitter workaround
I think it's better to follow that. We migth want to optimize both cases
later if someone gets too upset by the extra delay from the modeset.
v2: Check the right thing when deciding whether to force a modeset
v3: Rebase, check HAS_IPS before forcing a modeset,
move ips_force_disable check into pipe_config_supports_ips()
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Marta Lofstedt <marta.lofstedt@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101664
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: Marta Lofsted <marta.lofstedt@intel.com> #v2
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170817145509.15549-1-ville.syrjala@linux.intel.com
All other fields use __
Cc: Ben Widawsky <ben@bwidawsk.net>
Fixes: db1689aa61 ("drm: Create a format/modifier blob")
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170824150814.5878-1-lionel.g.landwerlin@intel.com
A recent commit (272725c7db) has removed
the use of 'bits_per_pixel' in DRM. However the corresponding Exynos
driver code still uses the ambiguous 'bpp', even though it is now
initialized from fb->cpp[0].
Consistenly use 'cpp' in FIMD, DECON7 and DECON5433 drivers.
Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
We always translate the dma address such that the offsets of
the source image are zero. Hence we can remove manipulation of
the MXR_GRAPHIC_SXY(win) register and just zero them once
in mixer_win_reset().
Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
DRM core already checks in drm_atomic_plane_check() if the
pixelformat is valid. Hence we can collapse the default case
of the switch statement with the XRGB8888 case.
No functional change.
Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
DRM core already checks in drm_atomic_plane_check() if the
pixelformat is valid. Hence we can drop the default case of
the switch statement and collapse most of the code.
Also rename the two booleans to reflect what true/false
actually means, and to avoid mixing CrCb/NV21 descriptions.
No functional change.
Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The video processor supports a tiled version of the NV12 format,
known as NV12MT in V4L2 terms. The support was removed in commit
083500baef due to not being a real
pixel format, but rather NV12 with a special memory layout.
With the introduction of FB modifiers, we can now properly support
this format again.
Tested with a hacked up modetest from libdrm's test suite on
an ODROID-X2 (Exynos4412).
Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The current comment sounds like the division op is done to
compensate for some hardware erratum. But the chroma plane
having half the height of the luma plane is just the way
NV12/NV21 is defined, so clarify this behaviour.
Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Since i80/command mode is determined in runtime by propagating info
from panel this property can be removed.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Since i80/command mode is determined in runtime by propagating info
from panel this property can be removed.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Since panel's mode of work is propagated properly from panel to DECON,
there is no need to use redundant private device tree property.
The only issue with such approach is that check for required interrupts
should be postponed until panel communicate its requirements, ie to
mode validation phase - mode_valid callback.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
crtc::mode_valid callback is required to implement proper pipeline
validation for command/video modes. Since Exynos uses private
framework such callback should be added to it.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
To allow runtime validation of mode of work irq request
code should be split into two separate phases:
- irq reqesting,
- irq checking.
Following patches will move 2nd phase to mode validation phase.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
MIC driver should use info from CRTC to check mode of work instead of
illegally peeking into nodes of other devices.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
mipi_dsi framework provides information about panel's mode of work.
This info should be propagated upstream to configure all elements of
the pipeline. As CRTC is the common denominator of the pipeline we can
put such info into its structures.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Description of drm_helper_hpd_irq_event clearly states that drivers
supporting hotplug events per connector should use different helper -
drm_kms_helper_hotplug_event. To achieve it following changes have
been performed:
- moved down all DSI ops - they require exynos_dsi_disable function
to be defined earlier,
- simplified exynos_dsi_detect - there is no real detection, it just
returns if panel is attached,
- DSI attach/detach callbacks attaches/detaches DRM panel and sets
connector status and other context fields accordingly, all this is
performed under mutex, as these callbacks are asynchronous.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
All encoders share the same code to set encoders possible_crtcs field.
The patch creates helper to abstract out this code.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Linux core provide helpers for polling with timeout, lets use them.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
A single patch switching to a new OF helper.
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Merge tag 'sunxi-drm-for-4.14-2' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into drm-next
sun4i DRM changes for 4.14, take 2
A single patch switching to a new OF helper.
* tag 'sunxi-drm-for-4.14-2' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
drm/sun4i: use of_graph_get_remote_endpoint()
* fix compilation when compiling omapfb driver
* WA for OMAP3 endless sync lost issue
* WA for OMAP5 DSI PLL issue
* fix analog TV out modecheck
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Merge tag 'omapdrm-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux into drm-next
omapdrm fixes for 4.14
* fix compilation when compiling omapfb driver
* WA for OMAP3 endless sync lost issue
* WA for OMAP5 DSI PLL issue
* fix analog TV out modecheck
* tag 'omapdrm-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
ARM: OMAP2+: fix missing variable declaration
drm/omap: work-around for omap3 display enable
drm/omap: fix i886 work-around
drm/omap: fix analog tv-out modecheck
Updates for 4.14.. I have some further patches from Jordan to add
multiple priority levels and pre-emption, but those will probably be
for 4.15 to give me time for the mesa parts.
* tag 'drm-msm-next-2017-08-22' of git://people.freedesktop.org/~robclark/linux:
drm/msm/mdp5: mark runtime_pm functions as __maybe_unused
drm/msm: remove unused variable
drm/msm/mdp5: make helper function static
drm/msm: make msm_framebuffer_init() static
drm/msm: add helper to allocate stolen fb
drm/msm: don't track fbdev's gem object separately
drm/msm: add modeset module param
drm/msm/mdp5: add tracking for clk enable-count
drm/msm: remove unused define
drm/msm: Add a helper function for in-kernel buffer allocations
drm/msm: Attach the GPU MMU when it is created
drm/msm: Add A5XX hardware fault detection
drm/msm: Remove uneeded platform dev members
drm/msm/mdp5: Set up runtime PM for MDSS
drm/msm/mdp5: Write to SMP registers even if allocations don't change
drm/msm/mdp5: Don't use mode_set helper funcs for encoders and CRTCs
drm/msm/dsi: Implement RPM suspend/resume callbacks
drm/msm/dsi: Set up runtime PM for DSI
drm/msm/hdmi: Set up runtime PM for HDMI
drm/msm/mdp5: Use runtime PM get/put API instead of toggling clocks
By using drm_gem_flink/drm_gem_open on an object using the same fd, it
is possible for a client to create multiple handles pointing to the same
object (tied to the same contexts and VMA), as exemplified by
igt::gem_handle_to_libdrm_bo(). Since this duplication has been possible
since forever, we cannot assume that the handle:(fpriv, object) is
unique and so must handle the multiple users of a single VMA.
v2: Added commentary noise.
Testcase: igt/gem_close
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102355
Fixes: d1b48c1e71 ("drm/i915: Replace execbuf vma ht with an idr")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170822110517.22277-3-chris@chris-wilson.co.uk
Tested-by: Marta Lofstedt <marta.lofstedt@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Make sure that we are not leaking an entry in the ctx->handles_lut by
asserting that the object was removed prior to being freed. This should
be enforced by all such handles being removed by i915_gem_close_object.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20170822110517.22277-2-chris@chris-wilson.co.uk
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
During the context-close, we should be decoupling all the vma from the
object so that upon object-closing we shouldn't see any vma from the
already closed contexts. So include a check upon closing the object that
the context is still open.
v2: Eek, the fpriv check is required for shared objects. Double eek, BAT
passed?
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20170822110517.22277-1-chris@chris-wilson.co.uk
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
The function that was added doesn't actually build:
arch/arm/mach-omap2/display.c: In function 'omapdss_init_fbdev':
arch/arm/mach-omap2/display.c:184:2: error: 'r' undeclared (first use in this function)
This adds a declaration for 'r' to fix it.
Fixes: 5ce783025c ("ARM: OMAP2+: Don't register omapdss device for omapdrm")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
To avoid a potential hang condition with TLB invalidation
we need to enable masked bit 5 of MMIO 0xE5F0 at boot.
Same workaround was in place for previous platforms,
but the register offset has changed for CNL.
But also BSpec doesn't mention the bit 15 as set on gen9
platforms and mark bit as reserved on CNL.
v2: Improve commit message accepting Oscar's suggestion.
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170823203504.10012-1-rodrigo.vivi@intel.com
CS sometimes hangs on 3D Push Constant dispatches with the new
deref enhancement logic in CNL.
v2: Improve the commit message (Rodrigo)
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1503518191-19116-1-git-send-email-oscar.mateo@intel.com
Now, we can use of_graph_get_remote_endpoint(). Let's use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Seems that on omap3 enabling a crtc without any planes causes a sync
lost flood. This only happens on the first enable, and after that it
works. This looks like an HW issue and it's unclear why this is
happening or how to fix it.
This started happening after 897145d0c7
("drm/omapdrm: Move commit_modeset_enables() before commit_planes()")
which, as a work-around, changed omapdrm first to do the modeset enable,
and plane set only after that. This WA should be fine on all DSS
versions, but apparently OMAP3 DSS is an exception.
This patch reverts that work-around for OMAP3 DSS.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
7d267f068a ("drm/omap: work-around for
errata i886") changed how the PLL dividers and multipliers are
calculated. While the new way should work fine for all the PLLs, it
breaks omap5 PLLs. The issues seen are rather odd: seemed that the
output clock rate is half of what we asked. It is unclear what's causing
there issues.
As a work-around this patch adds a "errata_i886" flag, which is set only
for DRA7's PLLs, and the PLL setup is done according to that flag.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
omapdrm rejects all venc (analog tv-out) videomodes, due to somewhat
strict checking of the values, making tv-out unusable.
We only support two videomodes, one for PAL and one for NTSC, so instead
of trying to check every field in the videomode struct, this patch makes
the driver check only the pixel clock and the size of the display.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Not a lot that's ready to be included this round for Nouveau. GP108
modesetting support, and misc other fixes.
* 'linux-4.14' of git://github.com/skeggsb/linux:
drm/nouveau/kms/nv50: perform null check on msto[i] rathern than msto
drm/nouveau/pci/msi: disable MSI on big-endian platforms by default
drm/nouveau: silence suspend/resume debugging messages
drm/nouveau/kms/nv04-nv4x: fix exposed format list
drm/nouveau/kms/nv10-nv40: add NV21 support to overlay
drm/nouveau/kms/nv04-nv40: improve overlay error detection, fix pitch setting
drm/nouveau/kms/nv04-nv40: prevent undisplayable framebuffers from creation
drm/nouveau/mpeg: print more debug info when rejecting dma objects
drm/nouveau/fb/gf100-: zero mmu debug buffers
drm/nouveau/bar/gf100: add config option to limit BAR2 to 16MiB
initial support (display-only) for GP108
drm/nouveau/falcon: use a more reasonable msgqueue timeout value
drm/nouveau/disp: Silence DCB warnings.
drm/nouveau/bios: Demote missing fp table message to NV_DEBUG.
drm/nouveau/pmu/gt215-: abstract detection of whether reset is needed
drm/nouveau/pmu/gt215: fix reset
drm/nouveau/mc/gf100: add pmu to reset mask
drm/nouveau/disp/gf119-: avoid creating non-existent heads
drm/nouveau/therm/gm200: Added
drm/nouveau/therm: fix spelling mistake on array thresolds
We use WC pages for coherent writes into the ppGTT on !llc
architectures. However, to create a WC page requires a stop_machine(),
i.e. is very slow. To compensate we currently keep a per-vm cache of
recently freed pages, but we still see the slow startup of new contexts.
We can amoritize that cost slightly by allocating WC pages in small
batches (PAGEVEC_SIZE == 14) and since creating a WC page implies a
stop_machine() there is no penalty for keeping that stash global.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170822173828.5932-1-chris@chris-wilson.co.uk
Coffee Lake CPU on Kaby Lake PCH is possible.
It does exist, and it does work.
The only missed case was this warning here noticed
by Wendy who could get one system with this configuration
and reported the issue for us:
Hardware Configuration
Board ID KBL S DDR4 UDIMM EV CRB
Processor Intel® Processor code named Coffee Lake S, (6+2), 6 cores 12 threads, GT2, A0 (Internal) (QNJ4)
[ 3.220585] WARNING: CPU: 10 PID: 206 at drivers/gpu/drm/i915/i915_drv.c:340 i915_driver_load+0x1210/0x1660 [i915]
[ 3.221312] Modules linked in: hid_generic usbhid i915 i2c_algo_bit drm_kms_helper e1000e syscopyarea sysfillrect sysimgblt nvme fb_sys_fops ptp ahci i2c_hid drm pps_core nvme_core libahci wmi hid video
[ 3.222050] CPU: 10 PID: 206 Comm: systemd-udevd Not tainted 4.13.0-rc5-intel-next+ #1
[ 3.222706] Hardware name: Intel Corporation Kabylake Client platform/KBL S DDR4 UDIMM EV CRB, BIOS KBLSE2R1.R00.X089.P00.1705051000 05/05/2017
Cc: Wendy Wang <wendy.wang@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170821235056.9015-1-rodrigo.vivi@intel.com
When CONFIG_PM is disabled, we get harmless warnings about unused
functions:
drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c:1025:12: error: 'mdp5_runtime_resume' defined but not used [-Werror=unused-function]
static int mdp5_runtime_resume(struct device *dev)
^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c:1015:12: error: 'mdp5_runtime_suspend' defined but not used [-Werror=unused-function]
static int mdp5_runtime_suspend(struct device *dev)
^~~~~~~~~~~~~~~~~~~~
This marks both functions as __maybe_unused so the compiler
can drop them silently.
Fixes: d68fe15b18 ("drm/msm/mdp5: Use runtime PM get/put API instead of toggling clocks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rob Clark <robdclark@gmail.com>
A cleanup left behind an unused variable that we have to remove
in order to avoid this harmless warning:
drivers/gpu/drm/msm/adreno/a5xx_gpu.c: In function 'a5xx_zap_shader_init':
drivers/gpu/drm/msm/adreno/a5xx_gpu.c:493:19: error: unused variable 'a5xx_gpu' [-Werror=unused-variable]
Fixes: 8d6f08272b ("drm/msm: Remove uneeded platform dev members")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rob Clark <robdclark@gmail.com>
We'll later want to re-use this for state-readback when bootloader
enables display, so that we can create an fb for the initial
plane->state->fb.
Signed-off-by: Rob Clark <robdclark@gmail.com>
The drm_framebuffer is refcnt'd these days and will unref the underlying
bo as needed. So we can simplify a little.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Accessing registers for an unclocked block is an insta-reboot on
snapdragon devices. So add a bit of logic to track the enable_count so
we can WARN_ON() unclocked register writes. This makes it much easier
to track down mistakes.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Nearly all of the buffer allocations for kernel allocate an buffer object,
virtual address and GPU iova at the same time. Make a helper function to
handle the details.
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
[dropped msm_fbdev conversion to new helper, since it interferes with
display-handover work, where we want to separate allocation and mapping]
Signed-off-by: Rob Clark <robdclark@gmail.com>
Currently the GPU MMU is attached in the adreno_gpu code but as
more and more of the GPU initialization moves to the generic
GPU path we have a need to map and use GPU memory earlier and
earlier. There isn't any reason to defer attaching the MMU
until later so attach it right after the address space is
created so it can be used immediately.
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Move the part that reads the table and sets registers based on the
table to its own function.
v2: Rebase.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170822000356.17330-2-rodrigo.vivi@intel.com
Make it a little less magical and a little simpler and more hardcoded
so we don't end up with an array that's composed mostly of empty
entries.
v2: Add an enum for the voltage+register values (Ville).
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170822000356.17330-1-rodrigo.vivi@intel.com
If we miss the current vblank because the gpu was busy, that may cause a
jitter as the frame rate temporarily drops. We try to limit the impact
of this by then boosting the GPU clock to deliver the frame as quickly
as possible. Originally done in commit 6ad790c0f5 ("drm/i915: Boost GPU
frequency if we detect outstanding pageflips") but was never forward
ported to atomic and finally dropped in commit fd3a40242e ("drm/i915:
Rip out legacy page_flip completion/irq handling").
One of the most typical use-cases for this is a mostly idle desktop.
Rendering one frame of the desktop's frontbuffer can easily be
accomplished by the GPU running at low frequency, but often exceeds
the time budget of the desktop compositor. The result is that animations
such as opening the menu, doing a fullscreen switch, or even just trying
to move a window around are slow and jerky. We need to respond within a
frame to give the best impression of a smooth UX, as a compromise we
instead respond if that first frame misses its goal. The result should
be a near-imperceivable initial delay and a smooth animation even
starting from idle. The cost, as ever, is that we spend more power than
is strictly necessary as we overestimate the required GPU frequency and
then try to ramp down.
This of course is reactionary, too little, too late; nevertheless it is
surprisingly effective.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102199
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170817123706.6777-1-chris@chris-wilson.co.uk
Tested-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
