diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index ec29376667df..b24c14bfab31 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7496,6 +7496,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 	bool mode_set_reset_required = false;
 
 	drm_atomic_helper_update_legacy_modeset_state(dev, state);
+	drm_atomic_helper_calc_timestamping_constants(state);
 
 	dm_state = dm_atomic_get_new_state(state);
 	if (dm_state && dm_state->context) {
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 191d09ee4c7f..f9170b4b22e7 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1115,9 +1115,7 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
  * @old_state: atomic state object with old state structures
  *
  * This function updates all the various legacy modeset state pointers in
- * connectors, encoders and CRTCs. It also updates the timestamping constants
- * used for precise vblank timestamps by calling
- * drm_calc_timestamping_constants().
+ * connectors, encoders and CRTCs.
  *
  * Drivers can use this for building their own atomic commit if they don't have
  * a pure helper-based modeset implementation.
@@ -1187,8 +1185,6 @@ drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
 			crtc->y = new_plane_state->src_y >> 16;
 		}
 	}
-
-	drm_atomic_helper_calc_timestamping_constants(old_state);
 }
 EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state);
 
@@ -1295,6 +1291,7 @@ void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
 	disable_outputs(dev, old_state);
 
 	drm_atomic_helper_update_legacy_modeset_state(dev, old_state);
+	drm_atomic_helper_calc_timestamping_constants(old_state);
 
 	crtc_set_mode(dev, old_state);
 }
diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index b18e1efbbae1..f135b79593dd 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -674,7 +674,7 @@ EXPORT_SYMBOL(drm_calc_timestamping_constants);
  *
  * Note that atomic drivers must call drm_calc_timestamping_constants() before
  * enabling a CRTC. The atomic helpers already take care of that in
- * drm_atomic_helper_update_legacy_modeset_state().
+ * drm_atomic_helper_calc_timestamping_constants().
  *
  * Returns:
  *
@@ -819,7 +819,7 @@ EXPORT_SYMBOL(drm_crtc_vblank_helper_get_vblank_timestamp_internal);
  *
  * Note that atomic drivers must call drm_calc_timestamping_constants() before
  * enabling a CRTC. The atomic helpers already take care of that in
- * drm_atomic_helper_update_legacy_modeset_state().
+ * drm_atomic_helper_calc_timestamping_constants().
  *
  * Returns:
  *
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index ddb588f863f8..c0f01bdd6037 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -15577,6 +15577,7 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
 
 	if (state->modeset) {
 		drm_atomic_helper_update_legacy_modeset_state(dev, &state->base);
+		drm_atomic_helper_calc_timestamping_constants(&state->base);
 
 		intel_set_cdclk_pre_plane_update(state);
 
diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 852e1b56f3a7..b111fe24a06b 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -2069,6 +2069,7 @@ nv50_disp_atomic_commit_tail(struct drm_atomic_state *state)
 	drm_atomic_helper_wait_for_fences(dev, state, false);
 	drm_atomic_helper_wait_for_dependencies(state);
 	drm_atomic_helper_update_legacy_modeset_state(dev, state);
+	drm_atomic_helper_calc_timestamping_constants(state);
 
 	if (atom->lock_core)
 		mutex_lock(&disp->mutex);