diff options
| author | Oleg Vasilev <oleg.vasilev@intel.com> | 2019-06-13 15:18:00 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2019-06-14 19:10:04 +0300 |
| commit | 41ff5bd834356a310ad909152f19bf23963527ce (patch) | |
| tree | 2e0d48b143b09cb71af305e32b326f7178e11569 /drivers/gpu/drm/drm_vblank.c | |
| parent | a0e93c41eb75ab05bd07d4bd8027f30d484b3966 (diff) | |
| download | linux-41ff5bd834356a310ad909152f19bf23963527ce.tar.xz | |
drm: add debug print to update_vblank_count
Since we are logging all vblank counter updates 30 lines below,
it is also good to have some details whether and how vblank count
difference is calculated.
Signed-off-by: Oleg Vasilev <oleg.vasilev@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190613121802.2193-1-oleg.vasilev@intel.com
Diffstat (limited to 'drivers/gpu/drm/drm_vblank.c')
| -rw-r--r-- | drivers/gpu/drm/drm_vblank.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c index 0d704bddb1a6..603ab105125d 100644 --- a/drivers/gpu/drm/drm_vblank.c +++ b/drivers/gpu/drm/drm_vblank.c @@ -241,12 +241,16 @@ static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe, * on the difference in the timestamps and the * frame/field duration. */ + + DRM_DEBUG_VBL("crtc %u: Calculating number of vblanks." + " diff_ns = %lld, framedur_ns = %d)\n", + pipe, (long long) diff_ns, framedur_ns); + diff = DIV_ROUND_CLOSEST_ULL(diff_ns, framedur_ns); if (diff == 0 && in_vblank_irq) - DRM_DEBUG_VBL("crtc %u: Redundant vblirq ignored." - " diff_ns = %lld, framedur_ns = %d)\n", - pipe, (long long) diff_ns, framedur_ns); + DRM_DEBUG_VBL("crtc %u: Redundant vblirq ignored\n", + pipe); } else { /* some kind of default for drivers w/o accurate vbl timestamping */ diff = in_vblank_irq ? 1 : 0; |