drm/i915: Disable planes more atomically during modesets

Follow in the footsteps of commit c610e841 ("drm/i915:
Do plane/etc. updates more atomically across pipes") and
do the plane disables back to back for all pipes also when
we are disabling pipes.

This should provide for a potentially more atomic user
experience, which might be especially nice when using
joiner or tiled displays.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240305084730.19182-3-ville.syrjala@linux.intel.comReviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>

drivers/gpu/drm/i915/display/intel_display.c

@@ -6788,11 +6788,16 @@ static void intel_commit_modeset_disables(struct intel_atomic_state *state)
 		if (!old_crtc_state->hw.active)
 			continue;
 
-		intel_crtc_disable_planes(state, crtc);
-
 		disable_pipes |= BIT(crtc->pipe);
 	}
 
+	for_each_old_intel_crtc_in_state(state, crtc, old_crtc_state, i) {
+		if ((disable_pipes & BIT(crtc->pipe)) == 0)
+			continue;
+
+		intel_crtc_disable_planes(state, crtc);
+	}
+
 	/* Only disable port sync and MST slaves */
 	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
 					    new_crtc_state, i) {