@@ -739,8 +739,19 @@ static void intel_fbc_nuke(struct intel_fbc *fbc)
static void intel_fbc_activate(struct intel_fbc *fbc)
{
+ struct intel_display *display = fbc->display;
+
lockdep_assert_held(&fbc->lock);
+ /* only the fence can change for a flip nuke */
+ if (fbc->active && !intel_fbc_has_fences(display))
+ return;
+ /*
+ * In case of FBC dirt rect, any updates to the FBC registers will
+ * trigger the nuke.
+ */
+ drm_WARN_ON(display->drm, fbc->active && HAS_FBC_DIRTY_RECT(display));
+
intel_fbc_hw_activate(fbc);
intel_fbc_nuke(fbc);
If FBC is already active, we don't need to call FBC activate routine again unless there are changes to the fences. So skip this on all platforms that don't have fences. Any FBC register updates done after enabling the dirty rect support in xe3 will trigger nuke by FBC which is counter productive to the fbc dirty rect feature. The front buffer rendering sequence will call intel_fbc_flush() and which will call intel_fbc_nuke() or intel_fbc_activate() based on FBC status explicitly and won't get impacted by this change. v2: use HAS_FBC_DIRTY_RECT() move this functionality within intel_fbc_activate() v3: update to intel_fbc_activate logic (Ville) update to the patch description Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com> --- drivers/gpu/drm/i915/display/intel_fbc.c | 11 +++++++++++ 1 file changed, 11 insertions(+)