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2022-06-14lib/igt_debugfs: Add IGT_CRC_SOURCE environmental variableJessica Zhang
Adds support for the IGT_CRC_SOURCE environmental variable to make it easier for drivers to run tests using custom CRC sources. Example usage: `IGT_CRC_SOURCE=intf ./kms_pipe_crc_basic` If the IGT_CRC_SOURCE isn't set, use the original source that was passed in as a parameter to pipe_crc_new(). Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> Reviewed-by: Petri Latvala <petri.latvala@intel.com>
2022-05-31lib/igt_debugfs: Drop-caches support for msmRob Clark
Signed-off-by: Rob Clark <robdclark@chromium.org> Reviewed-by: Petri Latvala <petri.latvala@intel.com>
2021-11-29lib/igt_debugfs: Add helper for detecting debugfs filesRob Clark
Add a helper that can be used with, for ex, igt_require() so that tests can be skipped if the kernel is too old. Signed-off-by: Rob Clark <robdclark@chromium.org> Reviewed-by: Petri Latvala <petri.latvala@intel.com>
2021-11-29lib/igt_debugfs: Add helper for writing debugfs filesRob Clark
Signed-off-by: Rob Clark <robdclark@chromium.org> Reviewed-by: Petri Latvala <petri.latvala@intel.com>
2021-09-28lib/igt_debugfs: Handle memory allocation failures for CRCBhanuprakash Modem
Throw assert if failed to allocate memory for pipe crc. Fixes: https://gitlab.freedesktop.org/drm/intel/-/issues/4177 Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com> Reviewed-by: Karthik B S <karthik.b.s@intel.com>
2020-10-12lib: Don't fail debugfs lookup on an expected absent drm deviceChris Wilson
When looking up the /dev/dri/card0 for a render device, skip over holes in the minor index. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
2020-09-30lib/igt_debugfs: Add igt_debugfs_pipe_dir()Lyude Paul
Like igt_debugfs_connector_dir(), but for pipes instead. Changes since v4: * Make igt_debugfs_pipe_dir() much smaller - jcline * Fixup docs - jcline Reviewed-by: Jeremy Cline <jcline@redhat.com> Signed-off-by: Lyude Paul <lyude@redhat.com>
2020-05-07lib/i915: Split igt_require_gem() into i915/Chris Wilson
igt_require_gem() is a pecularity of i915/, move it out of the core. Similar opportunistic move of gem_reopen_driver() and gem_quiescent_gpu(). Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2020-04-29tests/kms_fbcon_fbt: Make FBC wait_until_update() more reliableJosé Roberto de Souza
We can't depend onto debugfs reads of the FBC status as compression takes one idle frame to recompress and we could easily miss that. Instead lets use the pipe CRC as it keeps the CRC of each frame so we can compare each other until a blink in the FBCON causes it do change. Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
2020-02-28lib/igt_debugfs: Add igt_crc_get_for_frame()Ville Syrjälä
Add a new helper to return the crc for a specific frame. Useful when we pipeline flips and crc captures more deeply to eliminate dead time between the flips. Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
2020-01-29i915: Drop prefault controlsChris Wilson
They haven't been effective for a long time; so drop them. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
2019-07-03lib: Add --skip-crc-compare optionMatt Roper
When using --interactive-debug, it's sometimes desirable to ignore CRC mismatches and let the test proceed as if they passed so that the on-screen outcome can be inspected. Let's add a debug option to allow this. Cc: igt-dev@lists.freedesktop.org Signed-off-by: Matt Roper <matthew.d.roper@intel.com> [vsyrjala: pimp the debug message to indicate the skip] Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2019-05-15lib: Show other clients when SETMASTER failsChris Wilson
Currently we only show the clients at DEBUG level which is not automatically shown for a SKIP. However, failing to SETMASTER is more often a mistake and we do want to see the other clients. The choice is at what level to show them? If we want to avoid having extra WARNs in CI, we should keep them to INFO, but on the other hand failing to acquire SETMASTER is tantamount to failure, so WARN. References: https://bugs.freedesktop.org/show_bug.cgi?id=110682 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Martin Peres <martin.peres@free.fr> Acked-by: Martin Peres <martin.peres@free.fr>
2019-03-27lib/debugfs: Don't do CRC sanity checks on amdgpuNicholas Kazlauskas
A black FB on amdgpu returns a CRC of (0, 0, 0), which IGT considers suspicious. All our CRC values are also 16-bit so a value of 0xffffffff can't be obtained. Drop the suspicious CRC checks on amdgpu by checking the device in crc_sanity_checks. We need the drm_fd for this so pass in pipe_crc to the function to get it. It makes more sense to me to do it this way than to duplicate code and the explanation on both calls to crc_sanity_checks. v2: rebase Cc: Leo Li <sunpeng.li@amd.com> Cc: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com>
2019-03-11lib/debugfs: Nuke enum intel_pipe_crc_sourceVille Syrjälä
No one is using anything but the "auto" crc source, so the enum listing other options is quite pointless. Let's switch to just using the string instead of the enum. That way any hypothetical test that wants to use a more specific crc source can just pass in the proper string. v2: Assert the string isn't NULL (Chris) Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
2019-03-11lib/debugfs: Fix wraparound handling for crc frame counter checkVille Syrjälä
Deal with frame counter wraparound correcrtly. v2: Make the comparison functions available for everyone (Chris) Add some docs (gtk-doc seems obtuse so not 100% warning free) Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> #v1 Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
2019-03-08lib/debugfs: Ensure null-termination in igt_hpd_storm_detectedPetri Latvala
Read sizeof - 1 to buf so it stays null-terminated. Signed-off-by: Petri Latvala <petri.latvala@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
2019-02-20lib/crc: Reset fifo underrun reporting for every crc captureDaniel Vetter
We have tons of issues with crc mismatches, but often by that time there was already a fifo underrun, which disables further fifo underrun reporting. Reset fifo underrun reporting before we capture a crc so that it's easier to figure out why the crc mismatch happened. Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
2019-02-01debugfs: Fix writing an extra zero out of bounds in igt_crc_to_string_extended()Maarten Lankhorst
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2019-01-18lib/igt_debugfs: Unify crc collectionMika Kahola
For one shot crc collection, let's use the same helper function as we use for continuous crc collection. With this patch, we first drain the pipe from queued crc values and read the fresh crc. v2: We don't need to drain the pipe right after we start collecting crc's (Dhinakaran) Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Signed-off-by: Mika Kahola <mika.kahola@intel.com>
2018-10-25lib/debugfs: function to open connector debugfs dirRamalingam C
Function to open a debugfs directory of a connector associated to a device. v2: instead of string manipulation openat used [Chris] Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2018-09-27lib/debugfs: Use a blocking read in igt_pipe_crc_get_single()Ville Syrjälä
All users of igt_pipe_crc_get_single() want a blocking read even if the fd was opened in nonblocking mode. Make it so. v2: Fix the docs for igt_pipe_crc_get_single() Cc: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
2018-09-05lib/debugfs: Function to read debugfs with the directory already openDhinakaran Pandiyan
tests/kms_frontbuffer_tracking and tests/kms_psr read debugfs nodes several times after opening the directory once. There is already an implementation of this in the kms_frontbuffer_tracking, moving that functionality to the library will allow us to share the code with kms_psr and kms_fbcon_fbt Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
2018-08-14lib/igt_debugfs: Add igt_pipe_crc_get_current() to get a crc.Maarten Lankhorst
A pair of igt_pipe_crc_drain() and igt_pipe_crc_get_single() has a bug in which you're not sure whether the new CRC is captured because the vblank irq may race against the CRC irq and delivered to userspace too soon. When receiving a vblank event, igt_pipe_crc_drain() will then drain all crc's, but not the new (stale) crc, which is then delivered and immediately returned by igt_pipe_crc_get_single(). Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2018-08-14lib/igt_debugfs: explicitly wait for first crc in igt_pipe_crc_startMahesh Kumar
Now crc framework does not wait for first CRC during open, User need to wait for crc if he wants so. This patch make changes in igt_pipe_crc_start to make sure we wait until first crc available after open to keep the tests behaviour same. Without this if driver is skipping few initial crcs there will be mismatch in expected and actual number of crcs returned by crc framework. Changes Since V1: - poll instead of read_one_crc (Maarten) Changes Since V2: - poll without timeout, we already have igt_timeout (Maarten) Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
2018-04-11lib/igt_debugfs: Add timeouts to opening pipe CRC fd.Maarten Lankhorst
This will fix the PSR tests to fail slightly faster, since they wait indefinitely for a CRC that never comes during open. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> [mlankhorst: Increase timeout to 10 seconds for HSW CRC w/a.] Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
2018-02-20lib: Always set mismatching index for igt_find_crc_mismatchChris Wilson
igt_debugfs.c: In function 'igt_assert_crc_equal': igt_debugfs.c:353:3: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized] igt_debugfs.c: In function 'igt_check_crc_equal': igt_debugfs.c:375:3: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized] Fixes: 7422d7540a3b ("lib/igt_debugfs: Introduce CRC check function, with logic made common") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2018-02-20lib: Cache the debugfs mountpointChris Wilson
When using igt_debugfs_*() inside a tight loop, the overhead of calling xstat64 (from is_mountpoint()) creeps up in the profiles. Eliminate it by caching the resultant path for finding/mounting debugfs. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2018-02-15lib/igt_debugfs: Fix igt_pipe_get_crcs.Maarten Lankhorst
read_crc returns an error instead of 0 on timeout now, so handle this correctly. This is a small error introduced in commit 7d48c0252c384d18318de89c54817bdfe9c832fc Author: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Date: Fri Feb 2 13:34:25 2018 +0100 lib/igt_debugfs: Add igt_pipe_crc_get_single and igt_pipe_crc_drain, v4. It causes the kms_chv_cursor_fail to take 27 minutes, so fix this.. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Petri Latvala <petri.latvala@intel.com>
2018-02-12lib/igt_debugfs: Add igt_pipe_crc_get_single and igt_pipe_crc_drain, v4.Maarten Lankhorst
Collecting CRC may result in a modeset and extra vblank waits. On some tests this will increase the runtime a lot, so it makes sense to keep it enabled, and only collect the most recent CRC when needed. Changes since v1: - Fix read_crc semantics. (Ville) Changes since v2: - Remove EAGAIN assert, can be reached from drain_crc. Changes since v3: - Do not infinitely loop in igt_pipe_crc_drain(). Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Mika Kahola <mika.kahola@intel.com> #v2 Tested-by: Vidya Srinivas <vidya.srinivas@intel.com>
2017-12-15lib/debug: Convert igt_drop_caches_set() to use common file writersChris Wilson
Why open code a printf/write loop, when we already have a function providing it? Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com
2017-12-05lib: avoid < in gtkdoc commentsDaniel Vetter
For reasons entirely not clear to me meson gtkdoc runs in strict xml parsing mode, whereas automake gtkdoc doesn't. And gtkdoc itself is tooooooooo dense to correctly escape this stuff. Paper around this. v2: {foo} instead of of tripy &lt;foo> (Joonas) v3: More fixups (Joonas) Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Petri Latvala <petri.latvala@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2017-11-29igt: Remove Android supportArkadiusz Hiler
This patch gets rid of the Android support, deleting all the hacks and moving code around to the places it belongs. Android build is not really maintained properly and rots rather fast. With recent push for Meson here and Android going for Soong it will only accelerate. It's a good time to drop the illusion of providing any support. Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Kalyan Kondapally <kalyan.kondapally@intel.com> Cc: Petri Latvala <petri.latvala@intel.com> Cc: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com> Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com> Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com> Acked-by: Petri Latvala <petri.latvala@intel.com>
2017-11-21tools: Stop opening the driver just to find the debugfsChris Wilson
Since the tools want to work without the module loaded, remove the assumption that we want to load the driver to find debugfs. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Ville Syrjala <ville.syrjala@linux.intel.com>
2017-11-16lib/debugfs: Make is_mountpoint() non-fatalChris Wilson
is_mountpoint() asserts rather than report the error. Normally this isn't a problem, except for atypical selftests. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
2017-11-02lib/igt_debugfs: Remove support for legacy CRC api.Maarten Lankhorst
In kernel v4.10 the legacy crc api has been replaced by a generic drm crc API. Remove support of the i915 legacy CRC api, since this is no longer needed. Cc: Tomi Sarvela <tomi.p.sarvela@intel.com> Cc: Petri Latvala <petri.latvala@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Acked-by: Petri Latvala <petri.latvala@intel.com> [mlankhorst: Put the igt_require_pipes_crc() changes in their own commit.] Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> #irc
2017-11-02lib/igt_debugfs: Use fstat instead of open for testing CRC support.Maarten Lankhorst
commit 8038e09be5a3ac06 ("drm/crc: Only open CRC on atomic drivers when the CRTC is active.") rejects opens on the CRC when the CRTC is not configured. Use fstat instead to check this file exists, so we don't accidentally rely on the legacy CRC path. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> #irc
2017-10-19lib: Flush the driver's internal cache of objects before countingChris Wilson
As the driver itself keeps a cache of objects, these too need to be flushed prior to producing a stable count of objects. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102655 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2017-10-04Fix compilation on some distrosAusmus, James
Some distros (such as Gentoo) are removing the include of sys/sysmacros.h from sys/types.h. Explicitly include sysmacros.h in files where we use the minor() and major() functions. Signed-off-by: James Ausmus <james.ausmus@intel.com> Reviewed-by: Petri Latvala <petri.latvala@intel.com>
2017-09-06igt/pm_rpm: Use libc 'ftw' rather than opencoding our own filetree walkChris Wilson
By using ftw, we avoid the issue of having to handle directory recursion ourselves and can focus on the test of checking the reading a sysfs/debugfs does not break runtime suspend. In the process, disregard errors when opening the individual files as they may fail for other reasons. v2: Bracket the file open/close with the wait_for_suspended() tests. Whilst the fd is open, it may be keeping the device awake, e.g. i915_forcewake_user. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Tested-by: Jari Tahvanainen <jari.tahvanainen@intel.com>
2017-09-05Use PATH_MAX to fix some sprintf-into-short-buffers warnings.Eric Anholt
Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2017-08-30lib/igt_debugfs: Open DRM driver without master for hpd storm exitPaul Kocialkowski
When running the full chamelium test binary, it occurs that the hpd storm exit handler (that restores its initial value) will fail when trying to acquire DRM master. This happens even though the previously-held DRM file descriptor was closed already. Since there is no need to get DRM master for debugfs access purposes, open the DRM node without requesting master to fix the issue. Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com> Reviewed-by: Lyude Paul <lyude@redhat.com>
2017-08-01lib/igt_debugfs: Prevent compiler warning on unchecked printf formatGabriel Krisman Bertazi
Commit 34a54192e1fb ("lib/igt_debugfs: Add extended helper to format crc to string") introduced the following compiler warning: igt_debugfs.c: In function ‘igt_crc_to_string_extended’: igt_debugfs.c:373:4: warning: format not a string literal, argument types not checked [-Wformat-nonliteral] i == (crc->n_words - 1) ? '\0' : delimiter); This patch addresses the warning while also preventing a possible bad memory access access if n_words is > 64. I have no clue why we care about the padding size (crc_size), but since this was added recently, I'd rather leave it alone. Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk> Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
2017-07-19lib/igt_debugfs: Add extended helper to format crc to stringPaul Kocialkowski
This introduces a igt_crc_to_string_extended helper that allows formatting a crc to a string with a given delimiter and size to print per crc word. Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com> Reviewed-by: Lyude <lyude@redhat.com>
2017-07-19lib/igt_debugfs: Introduce CRC check function, with logic made commonPaul Kocialkowski
This introduces an igt_check_crc_equal function in addition to igt_assert_crc_equal and makes the CRC comparison logic from the latter common. In particular, an igt_find_crc_mismatch function indicates whether there is a mistmatch and at what index, so that the calling functions can print the diverging values. Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com> Reviewed-by: Lyude <lyude@redhat.com>
2017-07-18lib/igt_debugfs: Update documentation and cleanupArkadiusz Hiler
The documentation was lying. The igt_crc_to_string() is threadsafe and does not return a pointer to an internal buffer. Actually the caller is responsible for the memory that is allocated (and they are for all the current cases), so let's put that in the doc too. While I was at it I got rid of strdup() in favor of an early allocation. Cc: Martin Peres <martin.peres@intel.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com> Reviewed-by: Martin Peres <martin.peres@intel.com>
2017-06-09lib/igt_debugfs: Only use valid values in igt_crc_to_str()Brian Starkey
Not all elements in the crc array may be valid, so only use the valid ones to generate the string. Signed-off-by: Brian Starkey <brian.starkey@arm.com> Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
2017-06-09lib/igt_debugfs: Remove igt_debugfs_tBrian Starkey
It's not used anymore, so remove it. Signed-off-by: Brian Starkey <brian.starkey@arm.com> Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
2017-04-07lib/pipe_crc: Cache debugfs directoryChris Wilson
Keep the debugfs dir found during pipe_crc init around for the entire duration of the test. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2017-04-07lib/debugfs: Close dir before returning open debugs fileAnder Conselvan de Oliveira
The function igt_debugfs_open() would not close the debugfs dir before returning. Tests that do a lot of pipe CRC comparaions, such as kms_cursor_crc, would eventually fail. (kms_cursor_crc:3853) igt-debugfs-CRITICAL: Test assertion failure function igt_pipe_crc_do_start, file igt_debugfs.c:387: (kms_cursor_crc:3853) igt-debugfs-CRITICAL: Failed assertion: err == 0 (kms_cursor_crc:3853) igt-debugfs-CRITICAL: Last errno: 24, Too many open files (kms_cursor_crc:3853) igt-debugfs-CRITICAL: error: -24 != 0 83884e97e187 ("Restore "lib: Open debugfs files for the given DRM device"") Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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