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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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