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| author | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2016-03-03 15:36:41 +0100 |
|---|---|---|
| committer | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2016-03-03 18:24:57 +0100 |
| commit | 3f177625ee896f5d3c62fa6a49554a9c0243bceb (patch) | |
| tree | f2e708ebea99eb48d2d1d50f7b6a97640287d5ed /drivers/gpu/drm/i915/intel_drv.h | |
| parent | drm/i915/bxt: Additional MIPI clock divider form B0 stepping onwards (diff) | |
| download | linux-3f177625ee896f5d3c62fa6a49554a9c0243bceb.tar.xz linux-3f177625ee896f5d3c62fa6a49554a9c0243bceb.zip | |
drm/i915: Add wait_for_us
This is for callers who want micro-second precision but are not
waiting from the atomic context.
v2:
* Fix atomic waits. (Dave Gordon)
* Use USEC_PER_SEC and USEC_PER_MSEC. (Chris Wilson)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Dave Gordon <david.s.gordon@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 6c0085496fca..c2a62e9554b3 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -45,8 +45,8 @@ * having timed out, since the timeout could be due to preemption or similar and * we've never had a chance to check the condition before the timeout. */ -#define _wait_for(COND, MS, W) ({ \ - unsigned long timeout__ = jiffies + msecs_to_jiffies(MS) + 1; \ +#define _wait_for(COND, US, W) ({ \ + unsigned long timeout__ = jiffies + usecs_to_jiffies(US) + 1; \ int ret__ = 0; \ while (!(COND)) { \ if (time_after(jiffies, timeout__)) { \ @@ -55,7 +55,7 @@ break; \ } \ if ((W) && drm_can_sleep()) { \ - usleep_range((W)*1000, (W)*2000); \ + usleep_range((W), (W)*2); \ } else { \ cpu_relax(); \ } \ @@ -63,10 +63,11 @@ ret__; \ }) -#define wait_for(COND, MS) _wait_for(COND, MS, 1) -#define wait_for_atomic(COND, MS) _wait_for(COND, MS, 0) -#define wait_for_atomic_us(COND, US) _wait_for((COND), \ - DIV_ROUND_UP((US), 1000), 0) +#define wait_for(COND, MS) _wait_for((COND), (MS) * 1000, 1000) +#define wait_for_us(COND, US) _wait_for((COND), (US), 1) + +#define wait_for_atomic(COND, MS) _wait_for((COND), (MS) * 1000, 0) +#define wait_for_atomic_us(COND, US) _wait_for((COND), (US), 0) #define KHz(x) (1000 * (x)) #define MHz(x) KHz(1000 * (x)) |