drm/nouveau/tmr: calibrate for ns timestamps on init

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We previously assumed (incorrectly a lot of the time) that PTIMER would
be programmed at a frequency which'd give its 64-bit timestamps in
nanoseconds.

By programming PTIMER ourselves, we avoid this problem.

Reviewed-by: Martin Peres <martin.peres@ensi-bourges.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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Ben Skeggs 2011-07-03 21:16:12 +10:00

parent 16cd399c65

commit 591b06d73b

1 changed files with 82 additions and 26 deletions

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116

drivers/gpu/drm/nouveau/nv04_timer.c

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