drm/i915/gen9: Fix runtime PM refcounting in case DMC firmware isn't loaded

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While we disable runtime PM and with that display power well support if
the DMC firmware isn't loaded, we still want to disable power wells
during system suspend and driver unload. So drop/reacquire the
corresponding power refcount during suspend/resume and driver unloading.
This also means we have to check if DMC is not loaded and skip enabling
DC states in the power well code.

v2:
- Reuse intel_csr_ucode_suspend() in intel_csr_ucode_fini() instead of
  opencoding the former. (Chris)
- Add docbook comment to the public resume and suspend functions.

CC: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1460980101-14713-1-git-send-email-imre.deak@intel.com

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This commit is contained in:

Imre Deak 2016-04-18 14:48:21 +03:00

parent bf93ba67e9

commit f74ed08d55

4 changed files with 50 additions and 4 deletions

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5

drivers/gpu/drm/i915/i915_drv.c

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44

drivers/gpu/drm/i915/intel_csr.c

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2

drivers/gpu/drm/i915/intel_drv.h

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3

drivers/gpu/drm/i915/intel_runtime_pm.c

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