drm: rcar-du: Expose the VSP1 compositor through KMS planes

On R-Car Gen3 SoCs the DU lost its ability to access memory directly and
needs to work in conjunction with the VSP to do so. This commit handles
the VSP internally to hide it from the user.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

1 files changed, 25 insertions, 3 deletions

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index f5c00c0..43a53ad 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -28,6 +28,7 @@
 #include "rcar_du_kms.h"
 #include "rcar_du_lvdsenc.h"
 #include "rcar_du_regs.h"
+#include "rcar_du_vsp.h"
 
 /* -----------------------------------------------------------------------------
  * Format helpers
@@ -195,12 +196,16 @@ static void rcar_du_output_poll_changed(struct drm_device *dev)
 static int rcar_du_atomic_check(struct drm_device *dev,
 				struct drm_atomic_state *state)
 {
+	struct rcar_du_device *rcdu = dev->dev_private;
 	int ret;
 
 	ret = drm_atomic_helper_check(dev, state);
 	if (ret < 0)
 		return ret;
 
+	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE))
+		return 0;
+
 	return rcar_du_atomic_check_planes(dev, state);
 }
 
@@ -544,9 +549,26 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 		 */
 		rgrp->dptsr_planes = rgrp->num_crtcs > 1 ? 0xf0 : 0;
 
-		ret = rcar_du_planes_init(rgrp);
-		if (ret < 0)
-			return ret;
+		if (!rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) {
+			ret = rcar_du_planes_init(rgrp);
+			if (ret < 0)
+				return ret;
+		}
+	}
+
+	/* Initialize the compositors. */
+	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) {
+		for (i = 0; i < rcdu->num_crtcs; ++i) {
+			struct rcar_du_vsp *vsp = &rcdu->vsps[i];
+
+			vsp->index = i;
+			vsp->dev = rcdu;
+			rcdu->crtcs[i].vsp = vsp;
+
+			ret = rcar_du_vsp_init(vsp);
+			if (ret < 0)
+				return ret;
+		}
 	}
 
 	/* Create the CRTCs. */