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drm: Clarify vblank ts/scanoutpos sampling #defines

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I've read INVBL as "invalid backlight" and got mightly confused.
The #defines are already fairly long and we can afford to extend
them a bit more without resulting in ugly code all over.

I'm not sure how useful the complicated bitmask return value of these
functions really are since no one checks them. But for now let's keep
things as is.

Cc: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter
2014-09-10 17:36:11 +02:00
parent fb446a1acd
commit 3d3cbd8430
6 changed files with 8 additions and 8 deletions
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4
drivers/gpu/drm/drm_irq.c
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@@ -721,7 +721,7 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc,
* within vblank area, counting down the number of lines until
* start of scanout.
*/
invbl = vbl_status & DRM_SCANOUTPOS_INVBL;
invbl = vbl_status & DRM_SCANOUTPOS_IN_VBLANK;
/* Convert scanout position into elapsed time at raw_time query
* since start of scanout at first display scanline. delta_ns
@@ -751,7 +751,7 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc,
vbl_status = DRM_VBLANKTIME_SCANOUTPOS_METHOD;
if (invbl)
vbl_status |= DRM_VBLANKTIME_INVBL;
vbl_status |= DRM_VBLANKTIME_IN_VBLANK;
return vbl_status;
}