drm/i915: move gen6 rps handling to workqueue

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The render P-state handling code requires reading from a GT register.
This means that FORCEWAKE must be written to, a resource which is shared
and should be protected by struct_mutex. Hence we can not manipulate
that register from within the interrupt handling and so must delegate
the task to a workqueue.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>

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Ben Widawsky 2011-04-25 11:25:20 -07:00 • committed by Keith Packard

parent d1ebd816e6

commit 4912d04193

5 changed files with 58 additions and 9 deletions

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1

drivers/gpu/drm/i915/i915_dma.c

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4

drivers/gpu/drm/i915/i915_drv.h

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49

drivers/gpu/drm/i915/i915_irq.c

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5

drivers/gpu/drm/i915/i915_reg.h

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8

drivers/gpu/drm/i915/intel_display.c

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