drm/i915: Skip CHV PHY asserts until PHY has been fully reset

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The BIOS can leave the CHV display PHY in some odd state where
some of the LDOs/lanes won't power down fully when unused. This
will trigger a host of asserts that were added in:
30142273a3 drm/i915: Add CHV PHY LDO power sanity checks
6669e39f95 drm/i915: Add some CHV DPIO lane power state asserts

To avoid that, skip the asserts until the PHY power well has been
disabled at least once. That will fully reset the PHY, and once
brought back up, the dynamic power down features will work correctly.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Deepak S<deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

...

This commit is contained in:

Ville Syrjälä 2015-09-08 18:05:45 +03:00 • committed by Daniel Vetter

parent 9571b190cf

commit 3be60de9e9

2 changed files with 48 additions and 1 deletions

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3

drivers/gpu/drm/i915/i915_drv.h

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46

drivers/gpu/drm/i915/intel_runtime_pm.c

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