| commit | 913d8d110078788c14812dce8bb62c37946821d2 | |
| author | Chris Wilson <chris@chris-wilson.co.uk> | |
| Sat, 7 Aug 2010 10:01:35 +0000 (7 11:01 +0100) | ||
| committer | Eric Anholt <eric@anholt.net> | |
| Mon, 9 Aug 2010 18:24:35 +0000 (9 11:24 -0700) | ||
| tree | 982a622078194b438bf75d0ee4c77cf1e4f0260e | treesnapshot (tar.gz zip) |
| parent | dd785e35cb3c430c2290d351e67715864f7e5db5 | commitdiff |
drm/i915: Ensure that while(INREG()) are bounded (v2)
Add a new macro, wait_for, to simplify the act of waiting on a register
to change state. wait_for() takes three arguments, the condition to
inspect on every loop, the maximum amount of time to wait and whether to
yield the cpu for a length of time after each check.
v2: Upgrade failure messages to DRM_ERROR on the suggestion of
Eric Anholt. We do not expect to hit these conditions as they reflect
programming errors, so if we do we want to be notified.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
Add a new macro, wait_for, to simplify the act of waiting on a register
to change state. wait_for() takes three arguments, the condition to
inspect on every loop, the maximum amount of time to wait and whether to
yield the cpu for a length of time after each check.
v2: Upgrade failure messages to DRM_ERROR on the suggestion of
Eric Anholt. We do not expect to hit these conditions as they reflect
programming errors, so if we do we want to be notified.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>