From: Ville Syrjälä ville.syrjala@linux.intel.com
--- drivers/gpu/drm/i915/intel_atomic.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c index 170ac6f..c6531b0 100644 --- a/drivers/gpu/drm/i915/intel_atomic.c +++ b/drivers/gpu/drm/i915/intel_atomic.c @@ -35,6 +35,7 @@ //#define FORCE_CACHE_FLUSH
//#define SURFLIVE_DEBUG +//#define FLIP_TIME_DEBUG
struct intel_flip { struct drm_flip base; @@ -1842,6 +1843,10 @@ static void intel_flip_cleanup(struct drm_flip *flip) kfree(intel_flip); }
+#ifdef FLIP_TIME_DEBUG +static ktime_t tstart, tend, tdiff; +#endif + static void intel_flip_driver_flush(struct drm_flip_driver *driver) { struct drm_i915_private *dev_priv = @@ -1849,6 +1854,13 @@ static void intel_flip_driver_flush(struct drm_flip_driver *driver)
/* Flush posted writes */ I915_READ(PIPEDSL(PIPE_A)); + +#ifdef FLIP_TIME_DEBUG + tend = ktime_get(); + tdiff = ktime_sub(tend, tstart); + if (ktime_to_ns(tdiff) >= 10000ULL) + DRM_DEBUG_KMS("**** flip took %llu nsec ****\n", ktime_to_ns(tdiff)); +#endif }
static bool intel_have_new_frmcount(struct drm_device *dev) @@ -2258,6 +2270,9 @@ static void intel_atomic_schedule_flips(struct drm_i915_private *dev_priv,
intel_pipe_vblank_evade(&intel_crtc->base);
+#ifdef FLIP_TIME_DEBUG + tstart = ktime_get(); +#endif drm_flip_driver_schedule_flips(&dev_priv->flip_driver, flips);
local_irq_enable();