[PATCH] drm/fsl-dcu: Add multi layers support

[Meng Yi]

For DCU support 16 layers(on ls1021a) or 64 layers(on vf610),
add (total_layer - 1) overlay planes.

Signed-off-by: Jianwei Wang <jianwei.wang.chn at gmail.com>
Signed-off-by: Meng Yi <meng.yi at nxp.com>
---
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c 
b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
index e50467a..3c2b6b4 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
@@ -235,8 +235,9 @@ void fsl_dcu_drm_init_planes(struct drm_device *dev)

 struct drm_plane *fsl_dcu_drm_primary_create_plane(struct drm_device *dev)
 {
-       struct drm_plane *primary;
-       int ret;
+       struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+       struct drm_plane *primary, *overlay;
+       int ret, i;

        primary = kzalloc(sizeof(*primary), GFP_KERNEL);
        if (!primary) {
@@ -256,5 +257,25 @@ struct drm_plane *fsl_dcu_drm_primary_create_plane(struct 
drm_device *dev)
        }
        drm_plane_helper_add(primary, &fsl_dcu_drm_plane_helper_funcs);

+       for (i = 0; i < fsl_dev->soc->total_layer - 1; i++) {
+               overlay = kzalloc(sizeof(struct drm_plane), GFP_KERNEL);
+               if (!overlay) {
+                       DRM_DEBUG_KMS("Failed to allocate overlay plane\n");
+                       continue;
+               }
+
+               ret = drm_universal_plane_init(dev, overlay, 1,
+                                              &fsl_dcu_drm_plane_funcs,
+                                              fsl_dcu_drm_plane_formats,
+                                              ARRAY_SIZE(
+                                              fsl_dcu_drm_plane_formats),
+                                              DRM_PLANE_TYPE_OVERLAY, NULL);
+               if (ret) {
+                       kfree(overlay);
+                       continue;
+               }
+               drm_plane_helper_add(overlay, &fsl_dcu_drm_plane_helper_funcs);
+       }
+
        return primary;
 }
-- 
2.1.0.27.g96db324