diff options
Diffstat (limited to 'drivers/gpu/drm/drm_irq.c')
| -rw-r--r-- | drivers/gpu/drm/drm_irq.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 8bcce7866d36..f92da0a32f0d 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c | |||
| @@ -708,7 +708,10 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc, | |||
| 708 | /* Subtract time delta from raw timestamp to get final | 708 | /* Subtract time delta from raw timestamp to get final |
| 709 | * vblank_time timestamp for end of vblank. | 709 | * vblank_time timestamp for end of vblank. |
| 710 | */ | 710 | */ |
| 711 | etime = ktime_sub_ns(etime, delta_ns); | 711 | if (delta_ns < 0) |
| 712 | etime = ktime_add_ns(etime, -delta_ns); | ||
| 713 | else | ||
| 714 | etime = ktime_sub_ns(etime, delta_ns); | ||
| 712 | *vblank_time = ktime_to_timeval(etime); | 715 | *vblank_time = ktime_to_timeval(etime); |
| 713 | 716 | ||
| 714 | DRM_DEBUG("crtc %d : v %d p(%d,%d)@ %ld.%ld -> %ld.%ld [e %d us, %d rep]\n", | 717 | DRM_DEBUG("crtc %d : v %d p(%d,%d)@ %ld.%ld -> %ld.%ld [e %d us, %d rep]\n", |