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Promote intel_os.c helpers to igt_os.c, so that I can re-use them for
some additional msm tests. Just big churny rename, no functional change.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
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Most of the time, i915 module unload happens inside a subtest.
So, using igt_fork() is OK. However, on i915_selftest, this
is called earlier, at igt_kselftest_begin. This causes an
error on IGT:
forking is only allowed in subtests or igt_simple_main
please refer to lib/igt_core documentation
As igt_fork() can only be used inside subtests. So, use
igt_fork_helper() instead.
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
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The logic already stores pw-reserve PID on a static var. Store
also the pipewire-pulse pid, in order to keep passing the arguments
on all functions.
Suggested-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
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Newer distributions like Fedora and openSUSE thumbweed are now
coming with pipewire-pulse instead of pulseaudio - either as
default or as an optional audio stack.
That adds a new requirement when unloading sound drivers,
which, in turn, is needed when the DRM driver is bound into
it.
Add the needed logic to work properly in case pipewire-pulse
is detected.
Tested on ADL-N with Fedora 35 and wireplumber:
IGT-Version: 1.26-g982672f3 (x86_64) (Linux: 5.18.0-rc7-drm-ad75b5b819c9+ x86_64)
Starting subtest: unbind-rebind
process 585 (alsactl) is using audio device. Should be terminated.
process 11932 (pipewire) is using audio device. Should be terminated.
process 11937 (pipewire-pulse) is using audio device. Should be requested to stop using them.
Preventing pipewire-pulse to use the audio drivers
Device Audio0 can not be acquired: Success
reserve acquired
Unloaded audio driver snd_hda_intel
Realoading snd_hda_intel
Subtest unbind-rebind: SUCCESS (2.603s)
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
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As we'll use this information at core_hotunplug to announce
when an audio module is unloaded, fill it even if return code
is zero.
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
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Before unloading or unbinding an audio driver, all processes
that are using it must be terminated. The current logic seeks
only for alsactl, but ignore other processes, including
pulseaudio.
Make the logic more general, extending it to any processes that
could have an open device under /dev/snd.
It should be noticed that some distros like Fedora and openSUSE
are now migrating from pulseaudio into pipewire-pulse. Right
now, there's no standard distribution-agnostic way to request
pipewire-pulse to stop using audio devices, but there's a new
patch upstream that will make things easier:
https://gitlab.freedesktop.org/pipewire/pipewire/-/commit/6ad6300ec657c88322a8cd6f3548261d3dc05359
Which should be available for pipewire-pulse versions 0.3.50 and
upper.
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
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Add a library function to read the current state of mem_sleep
Used by suspend tests without i915 to skip s3 cycle, if platform has
default state as s2idle. Reduces CI Execution time
v2: Addressed cosmetic review comments (Anshuman)
Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Riana Tauro <riana.tauro@intel.com>
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Some of the IGT framework relies on receving a uevent when a hang
occurs. So add a test that this actually works.
While testing this, noticed that hangs could sometimes be missed
because the uevent was (presumably) still in flight by the time the
handler was de-registered. So add an extra delay during cleanup to
give the uevent chance to arrive.
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
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rename igt_debug_manual_check and patch the igt function
igt_debug_wait_for_keypress() to assert if "all" is supplied.
v2: calling igt_debug_wait_for_keypress() with "all" will assert.
v3: Change igt_assert to igt_assert_f for adding clear log message.
v4: Rebase only.
Signed-off-by: Jeevan B <jeevan.b@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
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Provide a helper to do the malloc()+memcpy() in one swift blow.
Reviewed-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
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We can choose which compile warnings to enable, but once they are enabled
treat all warnings as error. This enforces stricter checks against compile
warnings creeping in.
v2: Fix redefinition warning errors from i915/gem_userptr_blits
v3: Fix the even more pedantic clang compilation
v4: Do not alter whitespace in lib/tests/igt_describe!
Note: clang does not build assembler/
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
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We have generic helpers for sysfs access in igt_sysfs.c, but we also
have a number of module parameter access specific helpers scattered here
and there. Start gathering the latter into a file of its own.
For i915, the long-term goal is to migrate from module parameters to
device specific debugfs parameters. With all igt module param access
centralized in one place, we can make the transition much easier.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
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The test is looking at sysfs/error so dumping the old
debugfs/i915_error_state looks quite silly. The only dilemma is whether
it is worth replacing with a line-by-line dump. I propose we make that a
future problem -- and leave it to whoever has to debug it next time.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
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Removing igt_skip_on_simulation() from lib since this feature
is not supported anymore. Func() defination hasn't been removed
since it can be used by some other drivers (currently amd is using
this function).
v2: Rebase
Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
Signed-off-by: Karthik B S <karthik.b.s@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
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Suspending to disk requires swap space, make sure it exists
before attempting to suspend to disk.
v2: Use igt_skip() [Thanks, Chris!]
v3: Use igt_skip_on_f()
Cc: Sujaritha Sundaresan <sujaritha.sundaresan@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Don Hiatt <don.hiatt@intel.com>
Reviewed-by: Sujaritha Sundaresan <sujaritha.sundaresan@intel.com>
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While igt isn't really security sensitive, forgetting to call
setgroups() before calling setgid() causes rpmlint on Fedora to
complain:
igt-gpu-tools.x86_64: E: missing-call-to-setgroups-before-setuid
/usr/lib64/libigt.so.0
...
missing-call-to-setgroups-before-setuid:
This executable is calling setuid and setgid without setgroups or
initgroups. There is a high probability this means it didn't relinquish
all groups, and this would be a potential security issue to be fixed.
Seek POS36-C on the web for details about the problem.
Since it's likely other package maintainers for other distros will have
to deal with similar issues eventually, and I can't see any harm in it,
let's do the right thing and call setgroups() first.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Lyude Paul <lyude@redhat.com>
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Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Lyude Paul <lyude@redhat.com>
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Remove it from intel_os.c and gem_exec_reuse.c and globally
define in igt_aux.c.
v3: update comment in the code and commit message.
Signed-off-by: Caz Yokoyama <caz.yokoyama@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
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This new test ensures DisplayPort audio works by using the Chamelium.
It enables the DisplayPort output and sends an audio signal containing a set of
frequencies we choose to all HDMI/DisplayPort audio devices. It starts
recording audio on the Chamelium device and uses the stream server to retrieve
captured audio pages. It then checks that the capture audio signal contains the
frequencies we sent, and only those, by computing a FFT.
A new library has been added to libigt to communicate with the stream server.
It implements a simple custom TCP protocol.
In case the test fails, a WAV file with the captured data is saved on disk.
Right now the test has a few limitations:
- Only the first channel is checked
- IGT only generates audio with a single sampling rate (48 KHz)
- Audio data is not captured in real-time
These limitations will be lifted in future patches.
PulseAudio must not run during the tests since ALSA is used directly. To ensure
this, edit /etc/pulse/client.conf and add `autospawn=no`. Then run
`pulseaudio --kill`.
This commit deletes the existing audio tests. They weren't run and required an
exotic configuration (HDMI audio splitter, dummy HDMI sink and a line-in port
on the DUT).
This patch also changes lib/igt_audio to use uint16_t instead of short. The
rationale is:
- The standard says a short is at least 16 bit wide, but a short can be
larger (in practice it won't happen, but better use types correctly)
- It makes it clearer that the audio format is S16_LE, since "16" is
in the type name.
This patch depends on the following Chameleon bugs:
- https://crbug.com/948060
- https://crbug.com/950857
Signed-off-by: Simon Ser <simon.ser@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
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Since igt_assert family of functions logs last errno we get a lot of
those: "Last errno: 25, Inappropriate ioctl for device"
isatty() seems to be the biggest offender in that area, so this patch
should limit amount of confusing messages significantly.
Cc: Martin Peres <martin.peres@linux.intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
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Petri pointed out that the maximum allowed number of files per process
is nr_open, not the system cap of file-max.
Suggested-by: Petri Latvala <petri.latvala@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110351
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
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Share the implementation to tweak the maximum number of open files.
The version in tests/i915/gem_exec_reuse.c was a little bit different,
but I don't think it needs to be because it would still return a
failure if any of the calls to setrlimit() fail. So I'm using the other
one.
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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Free test_line in all paths out of the function.
v2: Avoid freeing too soon (Chris)
Signed-off-by: Petri Latvala <petri.latvala@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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Add a missing closedir call.
Signed-off-by: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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Signed-off-by: Petri Latvala <petri.latvala@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
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Knowing how much we tried to allocate would be useful if one should need
to debug why it failed.
References: https://bugs.freedesktop.org/show_bug.cgi?id=109439
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Antonio Argenziano <antonio.argenziano@intel.com>
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Only pm_rpm still uses the igt_trash_aperture() and so we can remove it
from the lib and in the process convert it over from the legacy
libdrm_intel.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
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Note that 'proc_path' parameter in __igt_lsof_fds receives a string
which was initialized with the size of PATH_MAX and the local variable
'path' has the same size, but it also have to append: '/', '\0', and the
directory name. This situation caused the warning described below.
warning: ‘%s’ directive output may be truncated writing up to 255 bytes
into a region of size between 0 and 4095 [-Wformat-truncation=]
snprintf(path, sizeof(path), "%s/%s", proc_path, d->d_name);
note: ‘snprintf’ output between 2 and 4352 bytes into a destination of
size 4096 [..]
This commit fixes this problem by changing the string size passed by
__igt_lsoft to __igt_lsof_fds. The max size for the string is
strlen("/proc/%d/cwd")+1 where "%d" can be estimated with
CEILING(LOG_10(INT_MAX)), in this sense, it is safe to define a path
size of 30 characters.
Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
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This patch fix the following gcc warning:
warning: ‘strncpy’ specified bound 32 equals destination size
[-Wstringop-truncation]
strncpy(data->name, name, PARAM_NAME_MAX_SZ);
This error happens due to the '\0' character appended by strncpy. Notice
that reduces by one in the total of bytes to be copied, in this case, is
harmless because the strings received in the parameter already have
'\0'.
Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
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In a few tests (like gem_exec_await, gem_exec_schedule) we use the GPU
hang to break a deadlock hit during test setup. In these case we would
like to see where in kernel the process is stuck (if at all).
References: https://bugs.freedesktop.org/show_bug.cgi?id=105900
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Antonio Argenziano <antonio.argenziano@intel.com>
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Since more essential components use libudev, make its dependency
mandatory.
Signed-off-by: Antonio Argenziano <antonio.argenziano@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Petri Latvala <petri.latvala@intel.com>
Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Petri Latvala <petri.latvala@intel.com>
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v2: Use igt_swap()
Signed-off-by: Antonio Argenziano <antonio.argenziano@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michal Winiarski <michal.winiarski@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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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 <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>
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This reverts commit d7d3f4e87b827152f00bdf89a67871736672b492
and gets rid of the config option from the meson.build.
It was needed only for the Android support.
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Petri Latvala <petri.latvala@intel.com>
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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>
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I noticed that dpm was storing some information about which phase of
suspend failed inside suspend_stats. That will be useful to help debug
such failures, so automatically dump it after suspend fails.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
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Since I accidentally broke the build for some, by putting the pretty
printer for submission inside ifdef HAVE_PROCPS, it's time to move the
whole thing into lib/i915 while fixing this mistake.
Let's also rename the pretty printer and add a doc to it as well as the
section.
Fixes: f6dfe556659f ("lib: Extract helpers for determining submission method")
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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Couple of tests are using either determining submission method, or
pretty printing. Let's move those to helpers in lib.
v2: s/igt_show/gem_show
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Katarzyna Dec <katarzyna.dec@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Katarzyna Dec <katarzyna.dec@intel.com>
Acked-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
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The clone() system call has difficulty to make progress if interrupted
frequently by the signal helper process. At least on an APL, like in the
Bugzilla ticket below, this can introduce minutes of overhead to a
single system() call (leading to a global CI timeout). To get rid of the
overhead suspend the signal helper process for the duration of the
system() call, which is provided already by igt_system().
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103160
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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The clone() system call with a larger executable (like /bin/sh) may have
difficulty to make progress on some platforms if interrupted frequently.
So suspend the signal helper process for the duration of the syscall.
This is needed to solve an actual problem by the next patch.
v2:
- Clarify/fix code comments. (Chris)
- Update igt_system_quiet() as well accordingly.
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> (v1)
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Dump debugfs/i915_error_state to the debug channel if we detect an ERROR
uevent. This poses a few problems, not least that it is the auxiliary
process doing the dumping (so the output may be interleaved with the
test, but considering a hang occurred it is likely the test is blocked)
and the average error state is around 60k, which may prove unwieldy!
On the other hand, it may prove invaluable in debugging those impossible
to reproduce bugs.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
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Also, we are _GNU_SOURCE, so simplify the conditions accordingly.
The next patch will remove _GNU_SOURCE everywhere else.
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Acked-by: Petri Latvala <petri.latvala@intel.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Acked-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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We depend on kmstest_connector_type_str() matching the kernel.
Fix up the cases where we differ currently. Also add the missing
DPI "connector" type.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
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This removes the igt_require condition on the sysfs open call used to
write the suspend/resume delay so that it is allowed to fail. Intsead,
the code that depends on it is put in a conditional block.
This allows running test binaries as a non-privileged user for e.g.
listing the available tests with the SuspendResumeDelay parameter set
in igtrc configuration. Sysfs access would otherwise cause it to fail.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
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Printing the error code is kinda useful. Also tune down the blame
shifting away from i915, this could very well be an i915 bug, not just
a setup issue. Also move the notice to the require test, not the
failure, and suggest to look into dmesg.
v2: Dont print errno, igt_require/assert already do that in the
failure case (Chris).
Acked-by: tomi.p.sarvela@intel.com
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
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This adds support for configurable suspend/resume delay and takes the
occasion to move igtrc configuation from igt_chamelium to igt_core.
This way, suspend/resume delay configuration can be used for all tests.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
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This stores the autoresume delay provided via igt_set_autoresume_delay
for use during suspend via rtc wake scheduling. This delay was
previously only used for pm_test suspendm while the function suggests
it should be applied to all autoresume cases.
There is also definitely a use case for configuring the rtc wake delay,
so this implements it.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
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The hang detector relies on a uevent for notification and aborting the
test. As proposed, fine-grained resets may not produce a global uevent
and so this hang detection becomes void. As we don't expect any hang, we
can just reduce the reset to only a global + uevent and so maintain
functionality, and switch back to fine-grained resets afterwards.
Note that any test that requires testing fine-grained resets should
ensure that they are enabled first as igt may leave the global
parameters in an inconsistent state.
v2: Restore fine-grained resets for explict igt_allow_hang()
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
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Android does not have procps and it's not easy to compile it as a
dependency.
We can provide alternative, "naive" implementation that just shells out
to external commands (i.e. pkill and lsof) in case we do not have the
library.
v2: have separate functions for naive impls (J. Nikula)
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
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