drm/vc4: Add helpers for pm get/put.

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This makes sure the vc4_reset doesn't hit an obscure race with the
GET_PARAM ioctl, fixes a decrement outside of the lock, and prevents
future code from making mistakes with the weird return value of
pm_runtime_get_sync().

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190220210343.28157-6-eric@anholt.net
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

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This commit is contained in:

Eric Anholt 2019-02-20 13:03:42 -08:00

parent 13f0ec3417

commit cb74f6ee8e

4 changed files with 49 additions and 28 deletions

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21

drivers/gpu/drm/vc4/vc4_drv.c

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2

drivers/gpu/drm/vc4/vc4_drv.h

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21

drivers/gpu/drm/vc4/vc4_gem.c

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33

drivers/gpu/drm/vc4/vc4_v3d.c

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