drm/i915/psr: Extend SU area to cover cursor fully if needed

In case early transport is enabled SU area needs to be extended
to cover cursor area fully when cursor is in SU area.

Bspec: 68927

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231218175004.52875-3-jouni.hogander@intel.com

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

@@ -2002,6 +2002,29 @@ static void intel_psr2_sel_fetch_pipe_alignment(const struct intel_crtc_state *c
 		pipe_clip->y2 = ((pipe_clip->y2 / y_alignment) + 1) * y_alignment;
 }
 
+/*
+ * When early transport is in use we need to extend SU area to cover
+ * cursor fully when cursor is in SU area.
+ */
+static void
+intel_psr2_sel_fetch_et_alignment(struct intel_crtc_state *crtc_state,
+				  struct intel_plane_state *cursor_state,
+				  struct drm_rect *pipe_clip)
+{
+	struct drm_rect inter;
+
+	if (!crtc_state->enable_psr2_su_region_et ||
+	    !cursor_state->uapi.visible)
+		return;
+
+	inter = *pipe_clip;
+	if (!drm_rect_intersect(&inter, &cursor_state->uapi.dst))
+		return;
+
+	clip_area_update(pipe_clip, &cursor_state->uapi.dst,
+			 &crtc_state->pipe_src);
+}
+
 /*
  * TODO: Not clear how to handle planes with negative position,
  * also planes are not updated if they have a negative X
@@ -2043,7 +2066,8 @@ int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
 	struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
 	struct drm_rect pipe_clip = { .x1 = 0, .y1 = -1, .x2 = INT_MAX, .y2 = -1 };
-	struct intel_plane_state *new_plane_state, *old_plane_state;
+	struct intel_plane_state *new_plane_state, *old_plane_state,
+		*cursor_plane_state = NULL;
 	struct intel_plane *plane;
 	bool full_update = false;
 	int i, ret;
@@ -2123,6 +2147,13 @@ int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 		damaged_area.x2 += new_plane_state->uapi.dst.x1 - src.x1;
 
 		clip_area_update(&pipe_clip, &damaged_area, &crtc_state->pipe_src);
+
+		/*
+		 * Cursor plane new state is stored to adjust su area to cover
+		 * cursor are fully.
+		 */
+		if (plane->id == PLANE_CURSOR)
+			cursor_plane_state = new_plane_state;
 	}
 
 	/*
@@ -2151,6 +2182,11 @@ int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 	if (ret)
 		return ret;
 
+	/* Adjust su area to cover cursor fully as necessary */
+	if (cursor_plane_state)
+		intel_psr2_sel_fetch_et_alignment(crtc_state, cursor_plane_state,
+						  &pipe_clip);
+
 	intel_psr2_sel_fetch_pipe_alignment(crtc_state, &pipe_clip);
 
 	/*