drm/msm/mdp5: Add cursor planes

Register cursor drm_planes. The loop in modeset_init that inits the
planes and crtcs has to be refactored a bit. We first iterate all the
hwpipes to find the cursor planes. Then, we loop again to create
crtcs.

In msm_atomic_wait_for_commit_done, remove the check which bypasses
waiting for vsyncs if state->legacy_cursor_updates is true.

We will later create a fast path for cursor position changes in the
cursor plane's update_plane func that doesn't go via the regular
atomic commit path. For rest of cursor related updates, we will have
to wait for vsyncs, so ignore the legacy_cursor_updates flag.
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c

@@ -411,7 +411,9 @@ static int modeset_init(struct mdp5_kms *mdp5_kms)
 	struct msm_drm_private *priv = dev->dev_private;
 	const struct mdp5_cfg_hw *hw_cfg;
 	unsigned int num_crtcs;
-	int i, ret;
+	int i, ret, pi = 0, ci = 0;
+	struct drm_plane *primary[MAX_BASES] = { NULL };
+	struct drm_plane *cursor[MAX_BASES] = { NULL };
 
 	hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
 
@@ -438,13 +440,14 @@ static int modeset_init(struct mdp5_kms *mdp5_kms)
 	 * planes for the CRTCs, with the remainder as overlay planes:
 	 */
 	for (i = 0; i < mdp5_kms->num_hwpipes; i++) {
-		bool primary = i < num_crtcs;
+		struct mdp5_hw_pipe *hwpipe = mdp5_kms->hwpipes[i];
 		struct drm_plane *plane;
-		struct drm_crtc *crtc;
 		enum drm_plane_type type;
 
-		if (primary)
+		if (i < num_crtcs)
 			type = DRM_PLANE_TYPE_PRIMARY;
+		else if (hwpipe->caps & MDP_PIPE_CAP_CURSOR)
+			type = DRM_PLANE_TYPE_CURSOR;
 		else
 			type = DRM_PLANE_TYPE_OVERLAY;
 
@@ -456,10 +459,16 @@ static int modeset_init(struct mdp5_kms *mdp5_kms)
 		}
 		priv->planes[priv->num_planes++] = plane;
 
-		if (!primary)
-			continue;
+		if (type == DRM_PLANE_TYPE_PRIMARY)
+			primary[pi++] = plane;
+		if (type == DRM_PLANE_TYPE_CURSOR)
+			cursor[ci++] = plane;
+	}
+
+	for (i = 0; i < num_crtcs; i++) {
+		struct drm_crtc *crtc;
 
-		crtc  = mdp5_crtc_init(dev, plane, NULL, i);
+		crtc  = mdp5_crtc_init(dev, primary[i], cursor[i], i);
 		if (IS_ERR(crtc)) {
 			ret = PTR_ERR(crtc);
 			dev_err(dev->dev, "failed to construct crtc %d (%d)\n", i, ret);
@@ -791,6 +800,9 @@ static int hwpipe_init(struct mdp5_kms *mdp5_kms)
 	static const enum mdp5_pipe dma_planes[] = {
 			SSPP_DMA0, SSPP_DMA1,
 	};
+	static const enum mdp5_pipe cursor_planes[] = {
+			SSPP_CURSOR0, SSPP_CURSOR1,
+	};
 	const struct mdp5_cfg_hw *hw_cfg;
 	int ret;
 
@@ -814,6 +826,13 @@ static int hwpipe_init(struct mdp5_kms *mdp5_kms)
 	if (ret)
 		return ret;
 
+	/* Construct cursor pipes: */
+	ret = construct_pipes(mdp5_kms, hw_cfg->pipe_cursor.count,
+			cursor_planes, hw_cfg->pipe_cursor.base,
+			hw_cfg->pipe_cursor.caps);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 

drivers/gpu/drm/msm/msm_atomic.c

@@ -93,11 +93,6 @@ static void msm_atomic_wait_for_commit_done(struct drm_device *dev,
 		if (!crtc->state->enable)
 			continue;
 
-		/* Legacy cursor ioctls are completely unsynced, and userspace
-		 * relies on that (by doing tons of cursor updates). */
-		if (old_state->legacy_cursor_update)
-			continue;
-
 		kms->funcs->wait_for_crtc_commit_done(kms, crtc);
 	}
 }