diff options
| -rw-r--r-- | drivers/gpu/drm/drm_irq.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 91e8b4c55ea0..55239d285f25 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -453,12 +453,6 @@ void drm_calc_timestamping_constants(struct drm_crtc *crtc, int linedur_ns = 0, pixeldur_ns = 0, framedur_ns = 0; int dotclock = mode->crtc_clock; - /* Fields of interlaced scanout modes are only half a frame duration. - * Double the dotclock to get half the frame-/line-/pixelduration. - */ - if (mode->flags & DRM_MODE_FLAG_INTERLACE) - dotclock *= 2; - /* Valid dotclock? */ if (dotclock > 0) { int frame_size = mode->crtc_htotal * mode->crtc_vtotal; @@ -471,6 +465,12 @@ void drm_calc_timestamping_constants(struct drm_crtc *crtc, pixeldur_ns = 1000000 / dotclock; linedur_ns = div_u64((u64) mode->crtc_htotal * 1000000, dotclock); framedur_ns = div_u64((u64) frame_size * 1000000, dotclock); + + /* + * Fields of interlaced scanout modes are only half a frame duration. + */ + if (mode->flags & DRM_MODE_FLAG_INTERLACE) + framedur_ns /= 2; } else DRM_ERROR("crtc %d: Can't calculate constants, dotclock = 0!\n", crtc->base.id); |