drm/i915: Add locking to pll updates, v3.

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With async modesets this is no longer protected with connection_mutex,
so ensure that each pll has its own lock. The pll configuration state
is still protected; it's only the pll updates that need locking against
concurrency.

Changes since v1:
- Rebased.
- Fix locking to protect all accesses. (Durgadoss)
Changes since v2:
- Make the dpll_lock global to protect concurrent updates to the
  same register, for example DPLL_CTRL1 on skl. (Ander)

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/56F29F50.1090708@linux.intel.com
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>

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This commit is contained in:

Maarten Lankhorst 2016-03-23 14:51:12 +01:00

parent 55c561a708

commit fbf6d8798f

2 changed files with 26 additions and 6 deletions

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7

drivers/gpu/drm/i915/i915_drv.h

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25

drivers/gpu/drm/i915/intel_dpll_mgr.c

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