drm/exynos: g2d: use autosuspend mode for PM runtime

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The runqueue worker currently issues a get() when a new
node is processed, and a put() once a node is completed.

The corresponding suspend and resume calls currently only
do clock gating, but with the upcoming introduction of
IOMMU runpm also the corresponding IOMMU domain gets
enabled (for get()) and disabled (for put()). This
introduces performance regressions with we mitigate here.

Switch PM runtime to autosuspend, such that clock gating
and IOMMU control only happens when the engine is idle for
a 'long' time.

Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

...

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Tobias Jakobi 2016-09-27 17:59:56 +02:00 • committed by Inki Dae

parent 134a0fe984

commit 7c3fc2b5cc

1 changed files with 7 additions and 2 deletions

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drivers/gpu/drm/exynos/exynos_drm_g2d.c

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