linux-kernel - [PATCH v6 12/16] drm/rockchip: vop2: Register the primary plane and overlay plane separately

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Message-ID: <20241214081843.3330756-1-andyshrk@163.com>
Date: Sat, 14 Dec 2024 16:18:42 +0800
From: Andy Yan <andyshrk@....com>
To: heiko@...ech.de
Cc: hjc@...k-chips.com,
	krzk+dt@...nel.org,
	s.hauer@...gutronix.de,
	devicetree@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org,
	derek.foreman@...labora.com,
	detlev.casanova@...labora.com,
	Andy Yan <andy.yan@...k-chips.com>,
	Michael Riesch <michael.riesch@...fvision.net>
Subject: [PATCH v6 12/16] drm/rockchip: vop2: Register the primary plane and overlay plane separately

From: Andy Yan <andy.yan@...k-chips.com>

In the upcoming VOP of rk3576, a Window cannot attach to all Video Ports,
so make sure all VP find it's suitable primary plane, then register the
remain windows as overlay plane will make code easier.

Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
Tested-by: Michael Riesch <michael.riesch@...fvision.net> # on RK3568
Tested-by: Detlev Casanova <detlev.casanova@...labora.com>

---

(no changes since v3)

Changes in v3:
- Add comments for why we should treat rk3566 with special care.

 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 100 +++++++++++--------
 1 file changed, 61 insertions(+), 39 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index c87c98a8fb3a..e588d5d01e0a 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -2223,22 +2223,29 @@ static int vop2_plane_init(struct vop2 *vop2, struct vop2_win *win,
 	return 0;
 }
 
-static struct vop2_video_port *find_vp_without_primary(struct vop2 *vop2)
+/*
+ * On RK3566 these windows don't have an independent
+ * framebuffer. They can only share/mirror the framebuffer
+ * with smart0, esmart0 and cluster0 respectively.
+ * And RK3566 share the same vop version with Rk3568, so we
+ * need to use soc_id for identification here.
+ */
+static bool vop2_is_mirror_win(struct vop2_win *win)
 {
-	int i;
-
-	for (i = 0; i < vop2->data->nr_vps; i++) {
-		struct vop2_video_port *vp = &vop2->vps[i];
-
-		if (!vp->crtc.port)
-			continue;
-		if (vp->primary_plane)
-			continue;
+	struct vop2 *vop2 = win->vop2;
 
-		return vp;
+	if (vop2->data->soc_id == 3566) {
+		switch (win->data->phys_id) {
+		case ROCKCHIP_VOP2_SMART1:
+		case ROCKCHIP_VOP2_ESMART1:
+		case ROCKCHIP_VOP2_CLUSTER1:
+			return true;
+		default:
+			return false;
+		}
+	} else {
+		return false;
 	}
-
-	return NULL;
 }
 
 static int vop2_create_crtcs(struct vop2 *vop2)
@@ -2249,7 +2256,9 @@ static int vop2_create_crtcs(struct vop2 *vop2)
 	struct drm_plane *plane;
 	struct device_node *port;
 	struct vop2_video_port *vp;
-	int i, nvp, nvps = 0;
+	struct vop2_win *win;
+	u32 possible_crtcs;
+	int i, j, nvp, nvps = 0;
 	int ret;
 
 	for (i = 0; i < vop2_data->nr_vps; i++) {
@@ -2288,42 +2297,55 @@ static int vop2_create_crtcs(struct vop2 *vop2)
 	}
 
 	nvp = 0;
-	for (i = 0; i < vop2->registered_num_wins; i++) {
-		struct vop2_win *win = &vop2->win[i];
-		u32 possible_crtcs = 0;
-
-		if (vop2->data->soc_id == 3566) {
-			/*
-			 * On RK3566 these windows don't have an independent
-			 * framebuffer. They share the framebuffer with smart0,
-			 * esmart0 and cluster0 respectively.
-			 */
-			switch (win->data->phys_id) {
-			case ROCKCHIP_VOP2_SMART1:
-			case ROCKCHIP_VOP2_ESMART1:
-			case ROCKCHIP_VOP2_CLUSTER1:
+	/* Register a primary plane for every crtc */
+	for (i = 0; i < vop2_data->nr_vps; i++) {
+		vp = &vop2->vps[i];
+
+		if (!vp->crtc.port)
+			continue;
+
+		for (j = 0; j < vop2->registered_num_wins; j++) {
+			win = &vop2->win[j];
+
+			/* Aready registered as primary plane */
+			if (win->base.type == DRM_PLANE_TYPE_PRIMARY)
+				continue;
+
+			if (vop2_is_mirror_win(win))
 				continue;
-			}
-		}
 
-		if (win->type == DRM_PLANE_TYPE_PRIMARY) {
-			vp = find_vp_without_primary(vop2);
-			if (vp) {
+			if (win->type == DRM_PLANE_TYPE_PRIMARY) {
 				possible_crtcs = BIT(nvp);
 				vp->primary_plane = win;
+				ret = vop2_plane_init(vop2, win, possible_crtcs);
+				if (ret) {
+					drm_err(vop2->drm, "failed to init primary plane %s: %d\n",
+						win->data->name, ret);
+					return ret;
+				}
 				nvp++;
-			} else {
-				/* change the unused primary window to overlay window */
-				win->type = DRM_PLANE_TYPE_OVERLAY;
+				break;
 			}
 		}
+	}
+
+	/* Register all unused window as overlay plane */
+	for (i = 0; i < vop2->registered_num_wins; i++) {
+		win = &vop2->win[i];
+
+		/* Aready registered as primary plane */
+		if (win->base.type == DRM_PLANE_TYPE_PRIMARY)
+			continue;
+
+		if (vop2_is_mirror_win(win))
+			continue;
 
-		if (win->type == DRM_PLANE_TYPE_OVERLAY)
-			possible_crtcs = (1 << nvps) - 1;
+		win->type = DRM_PLANE_TYPE_OVERLAY;
 
+		possible_crtcs = (1 << nvps) - 1;
 		ret = vop2_plane_init(vop2, win, possible_crtcs);
 		if (ret) {
-			drm_err(vop2->drm, "failed to init plane %s: %d\n",
+			drm_err(vop2->drm, "failed to init overlay plane %s: %d\n",
 				win->data->name, ret);
 			return ret;
 		}
-- 
2.34.1