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In cases when runtime PM is enabled only from individual subtests and not
whole tests it is usable to be able to restore the old runtime PM config
and so avoid running subsequent subtests in an unexpected environment.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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HDA audio device can be present at various PCI paths on different systems
which the existing code did not account for.
Furthermore the failure to enable runtime PM was silent leaving callers
in the dark.
Improve it by auto-locating the PCI path and logging a warning when
something is not as expected.
v2:
* If there is no audio hw/driver there is no failure.
v3:
* Comment.
* Skip non-symlinks.
* Free path on failure and restore.
* Simplify with asprintf. (Chris Wilson)
v4:
* Find snd_hda_intel instance tied with an Intel device.
v5:
* Fix memory leak and silence Valgrind warning.
v6:
* Fix error out logic.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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IGT logging helpers are not signal safe so avoid calling them from exit
handlers.
At the same time refactor the code a bit to enable following patches.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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Some tests (the ones which call igt_setup_runtime_pm and
igt_pm_enable_audio_runtime_pm) change default system configuration and
never restore it.
The configured runtime suspend is aggressive and may influence behaviour
of subsequent tests, so it is better to restore to previous values on test
exit.
This way system behaviour, with regards to a random sequence of executed
tests, will be more consistent from one run to another.
v2: Read failure means no runtime pm support so don't assert on it.
v3: Install exit handler before the write to close the Ctrl^C race. (Imre)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> # v2
Acked-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
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- Move all the pm helpers into igt_pm.c. No idea why that wasn't done
in the original commit that created igt_pm.c.
- Add missing docs where needed.
Cc: David Weinehall <david.weinehall@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Move power management related code to a separate library.
Initially this is done only for workarounds that apply to external
components. Modify the users of such workarounds accordingly.
This currently involves HD audio and SATA link power management.
For SATA link PM there's also code to save the previous settings,
to allow for resetting the values after we've finished testing.
Signed-off-by: David Weinehall <david.weinehall@intel.com>
Reviewed-by: Marius Vlad <marius.c.vlad@intel.com>
Signed-off-by: Marius Vlad <marius.c.vlad@intel.com>
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