drm/nouveau/disp/nv50-: simplify definiton of core channels

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

29 files changed, 91 insertions, 428 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/Kbuild b/drivers/gpu/drm/nouveau/nvkm/engine/disp/Kbuild
index ee41fb75c94d..b580581ef5b8 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/Kbuild
@@ -79,14 +79,8 @@ nvkm-y += nvkm/engine/disp/basegp102.o
 nvkm-y += nvkm/engine/disp/corenv50.o
 nvkm-y += nvkm/engine/disp/coreg84.o
 nvkm-y += nvkm/engine/disp/coreg94.o
-nvkm-y += nvkm/engine/disp/coregt200.o
-nvkm-y += nvkm/engine/disp/coregt215.o
 nvkm-y += nvkm/engine/disp/coregf119.o
 nvkm-y += nvkm/engine/disp/coregk104.o
-nvkm-y += nvkm/engine/disp/coregk110.o
-nvkm-y += nvkm/engine/disp/coregm107.o
-nvkm-y += nvkm/engine/disp/coregm200.o
-nvkm-y += nvkm/engine/disp/coregp100.o
 nvkm-y += nvkm/engine/disp/coregp102.o
 
 nvkm-y += nvkm/engine/disp/ovlynv50.o
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.h
index d52420f410ed..10ce217cc081 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.h
@@ -63,6 +63,11 @@ int nv50_disp_base_new_(const struct nv50_disp_dmac_func *,
 			struct nv50_disp *, int chid,
 			const struct nvkm_oclass *, void *argv, u32 argc,
 			struct nvkm_object **);
+int nv50_disp_core_new_(const struct nv50_disp_dmac_func *,
+			const struct nv50_disp_chan_mthd *,
+			struct nv50_disp *, int chid,
+			const struct nvkm_oclass *oclass, void *argv, u32 argc,
+			struct nvkm_object **);
 int nv50_disp_ovly_new_(const struct nv50_disp_dmac_func *,
 			const struct nv50_disp_chan_mthd *,
 			struct nv50_disp *, int chid,
@@ -75,14 +80,21 @@ int nv50_disp_oimm_new(const struct nvkm_oclass *, void *, u32,
 		       struct nv50_disp *, struct nvkm_object **);
 int nv50_disp_base_new(const struct nvkm_oclass *, void *, u32,
 		       struct nv50_disp *, struct nvkm_object **);
+int nv50_disp_core_new(const struct nvkm_oclass *, void *, u32,
+		       struct nv50_disp *, struct nvkm_object **);
 int nv50_disp_ovly_new(const struct nvkm_oclass *, void *, u32,
 		       struct nv50_disp *, struct nvkm_object **);
 
 int g84_disp_base_new(const struct nvkm_oclass *, void *, u32,
 		      struct nv50_disp *, struct nvkm_object **);
+int g84_disp_core_new(const struct nvkm_oclass *, void *, u32,
+		      struct nv50_disp *, struct nvkm_object **);
 int g84_disp_ovly_new(const struct nvkm_oclass *, void *, u32,
 		      struct nv50_disp *, struct nvkm_object **);
 
+int g94_disp_core_new(const struct nvkm_oclass *, void *, u32,
+		      struct nv50_disp *, struct nvkm_object **);
+
 int gt200_disp_ovly_new(const struct nvkm_oclass *, void *, u32,
 			struct nv50_disp *, struct nvkm_object **);
 
@@ -92,9 +104,13 @@ int gf119_disp_oimm_new(const struct nvkm_oclass *, void *, u32,
 			struct nv50_disp *, struct nvkm_object **);
 int gf119_disp_base_new(const struct nvkm_oclass *, void *, u32,
 			struct nv50_disp *, struct nvkm_object **);
+int gf119_disp_core_new(const struct nvkm_oclass *, void *, u32,
+			struct nv50_disp *, struct nvkm_object **);
 int gf119_disp_ovly_new(const struct nvkm_oclass *, void *, u32,
 			struct nv50_disp *, struct nvkm_object **);
 
+int gk104_disp_core_new(const struct nvkm_oclass *, void *, u32,
+			struct nv50_disp *, struct nvkm_object **);
 int gk104_disp_ovly_new(const struct nvkm_oclass *, void *, u32,
 			struct nv50_disp *, struct nvkm_object **);
 
@@ -104,6 +120,8 @@ int gp102_disp_oimm_new(const struct nvkm_oclass *, void *, u32,
 			struct nv50_disp *, struct nvkm_object **);
 int gp102_disp_base_new(const struct nvkm_oclass *, void *, u32,
 			struct nv50_disp *, struct nvkm_object **);
+int gp102_disp_core_new(const struct nvkm_oclass *, void *, u32,
+			struct nv50_disp *, struct nvkm_object **);
 int gp102_disp_ovly_new(const struct nvkm_oclass *, void *, u32,
 			struct nv50_disp *, struct nvkm_object **);
 
@@ -135,11 +153,11 @@ extern const struct nv50_disp_mthd_list nv50_disp_core_mthd_sor;
 extern const struct nv50_disp_mthd_list nv50_disp_core_mthd_pior;
 extern const struct nv50_disp_mthd_list nv50_disp_base_mthd_image;
 
-extern const struct nv50_disp_chan_mthd g84_disp_core_chan_mthd;
+extern const struct nv50_disp_chan_mthd g84_disp_core_mthd;
 extern const struct nv50_disp_mthd_list g84_disp_core_mthd_dac;
 extern const struct nv50_disp_mthd_list g84_disp_core_mthd_head;
 
-extern const struct nv50_disp_chan_mthd g94_disp_core_chan_mthd;
+extern const struct nv50_disp_chan_mthd g94_disp_core_mthd;
 
 extern const struct nv50_disp_mthd_list gf119_disp_core_mthd_base;
 extern const struct nv50_disp_mthd_list gf119_disp_core_mthd_dac;
@@ -147,6 +165,6 @@ extern const struct nv50_disp_mthd_list gf119_disp_core_mthd_sor;
 extern const struct nv50_disp_mthd_list gf119_disp_core_mthd_pior;
 extern const struct nv50_disp_chan_mthd gf119_disp_base_mthd;
 
-extern const struct nv50_disp_chan_mthd gk104_disp_core_chan_mthd;
+extern const struct nv50_disp_chan_mthd gk104_disp_core_mthd;
 extern const struct nv50_disp_chan_mthd gk104_disp_ovly_mthd;
 #endif
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg84.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg84.c
index 1baa5c34b327..b16857f468ee 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg84.c
@@ -22,9 +22,6 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
-#include "rootnv50.h"
-
-#include <nvif/class.h>
 
 const struct nv50_disp_mthd_list
 g84_disp_core_mthd_dac = {
@@ -91,7 +88,7 @@ g84_disp_core_mthd_head = {
 };
 
 const struct nv50_disp_chan_mthd
-g84_disp_core_chan_mthd = {
+g84_disp_core_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
 	.prev = 0x000004,
@@ -105,13 +102,10 @@ g84_disp_core_chan_mthd = {
 	}
 };
 
-const struct nv50_disp_dmac_oclass
-g84_disp_core_oclass = {
-	.base.oclass = G82_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &nv50_disp_core_func,
-	.mthd = &g84_disp_core_chan_mthd,
-	.chid = 0,
-};
+int
+g84_disp_core_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+		  struct nv50_disp *disp, struct nvkm_object **pobject)
+{
+	return nv50_disp_core_new_(&nv50_disp_core_func, &g84_disp_core_mthd,
+				   disp, 0, oclass, argv, argc, pobject);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg94.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg94.c
index c65c9f3ff69f..ea5f48912c77 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg94.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coreg94.c
@@ -22,9 +22,6 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
-#include "rootnv50.h"
-
-#include <nvif/class.h>
 
 static const struct nv50_disp_mthd_list
 g94_disp_core_mthd_sor = {
@@ -37,7 +34,7 @@ g94_disp_core_mthd_sor = {
 };
 
 const struct nv50_disp_chan_mthd
-g94_disp_core_chan_mthd = {
+g94_disp_core_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
 	.prev = 0x000004,
@@ -51,13 +48,10 @@ g94_disp_core_chan_mthd = {
 	}
 };
 
-const struct nv50_disp_dmac_oclass
-g94_disp_core_oclass = {
-	.base.oclass = GT206_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &nv50_disp_core_func,
-	.mthd = &g94_disp_core_chan_mthd,
-	.chid = 0,
-};
+int
+g94_disp_core_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+		  struct nv50_disp *disp, struct nvkm_object **pobject)
+{
+	return nv50_disp_core_new_(&nv50_disp_core_func, &g94_disp_core_mthd,
+				   disp, 0, oclass, argv, argc, pobject);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregf119.c
index 200dd90e016b..9e48cc3625b5 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregf119.c
@@ -22,14 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
-#include "rootnv50.h"
 
-#include <core/client.h>
 #include <subdev/timer.h>
 
-#include <nvif/class.h>
-#include <nvif/unpack.h>
-
 const struct nv50_disp_mthd_list
 gf119_disp_core_mthd_base = {
 	.mthd = 0x0000,
@@ -157,7 +152,7 @@ gf119_disp_core_mthd_head = {
 };
 
 static const struct nv50_disp_chan_mthd
-gf119_disp_core_chan_mthd = {
+gf119_disp_core_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
 	.prev = -0x020000,
@@ -232,13 +227,10 @@ gf119_disp_core_func = {
 	.bind = gf119_disp_dmac_bind,
 };
 
-const struct nv50_disp_dmac_oclass
-gf119_disp_core_oclass = {
-	.base.oclass = GF110_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &gf119_disp_core_func,
-	.mthd = &gf119_disp_core_chan_mthd,
-	.chid = 0,
-};
+int
+gf119_disp_core_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+		    struct nv50_disp *disp, struct nvkm_object **pobject)
+{
+	return nv50_disp_core_new_(&gf119_disp_core_func, &gf119_disp_core_mthd,
+				   disp, 0, oclass, argv, argc, pobject);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk104.c
index 088ab222e823..ca095958efdf 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk104.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk104.c
@@ -22,9 +22,6 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
-#include "rootnv50.h"
-
-#include <nvif/class.h>
 
 static const struct nv50_disp_mthd_list
 gk104_disp_core_mthd_head = {
@@ -106,7 +103,7 @@ gk104_disp_core_mthd_head = {
 };
 
 const struct nv50_disp_chan_mthd
-gk104_disp_core_chan_mthd = {
+gk104_disp_core_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
 	.prev = -0x020000,
@@ -120,13 +117,10 @@ gk104_disp_core_chan_mthd = {
 	}
 };
 
-const struct nv50_disp_dmac_oclass
-gk104_disp_core_oclass = {
-	.base.oclass = GK104_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &gf119_disp_core_func,
-	.mthd = &gk104_disp_core_chan_mthd,
-	.chid = 0,
-};
+int
+gk104_disp_core_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+		    struct nv50_disp *disp, struct nvkm_object **pobject)
+{
+	return nv50_disp_core_new_(&gf119_disp_core_func, &gk104_disp_core_mthd,
+				   disp, 0, oclass, argv, argc, pobject);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk110.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk110.c
deleted file mode 100644
index df0f45c20108..000000000000
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregk110.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2015 Red Hat Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors: Ben Skeggs <bskeggs@redhat.com>
- */
-#include "dmacnv50.h"
-#include "rootnv50.h"
-
-#include <nvif/class.h>
-
-const struct nv50_disp_dmac_oclass
-gk110_disp_core_oclass = {
-	.base.oclass = GK110_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &gf119_disp_core_func,
-	.mthd = &gk104_disp_core_chan_mthd,
-	.chid = 0,
-};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm107.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm107.c
deleted file mode 100644
index 9e27f8fd98b6..000000000000
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm107.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2015 Red Hat Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors: Ben Skeggs <bskeggs@redhat.com>
- */
-#include "dmacnv50.h"
-#include "rootnv50.h"
-
-#include <nvif/class.h>
-
-const struct nv50_disp_dmac_oclass
-gm107_disp_core_oclass = {
-	.base.oclass = GM107_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &gf119_disp_core_func,
-	.mthd = &gk104_disp_core_chan_mthd,
-	.chid = 0,
-};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm200.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm200.c
deleted file mode 100644
index bb23a8658ac0..000000000000
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregm200.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2015 Red Hat Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors: Ben Skeggs <bskeggs@redhat.com>
- */
-#include "dmacnv50.h"
-#include "rootnv50.h"
-
-#include <nvif/class.h>
-
-const struct nv50_disp_dmac_oclass
-gm200_disp_core_oclass = {
-	.base.oclass = GM200_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &gf119_disp_core_func,
-	.mthd = &gk104_disp_core_chan_mthd,
-	.chid = 0,
-};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregp100.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregp100.c
deleted file mode 100644
index d5dff6619d4d..000000000000
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregp100.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2015 Red Hat Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors: Ben Skeggs <bskeggs@redhat.com>
- */
-#include "dmacnv50.h"
-#include "rootnv50.h"
-
-#include <nvif/class.h>
-
-const struct nv50_disp_dmac_oclass
-gp100_disp_core_oclass = {
-	.base.oclass = GP100_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &gf119_disp_core_func,
-	.mthd = &gk104_disp_core_chan_mthd,
-	.chid = 0,
-};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregp102.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregp102.c
index 6ad5f2fb2ac1..3ec353e90b3e 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregp102.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregp102.c
@@ -22,12 +22,9 @@
  * Authors: Ben Skeggs <bskeggs@redhat.com>
  */
 #include "dmacnv50.h"
-#include "rootnv50.h"
 
 #include <subdev/timer.h>
 
-#include <nvif/class.h>
-
 static int
 gp102_disp_core_init(struct nv50_disp_dmac *chan)
 {
@@ -66,13 +63,10 @@ gp102_disp_core_func = {
 	.bind = gf119_disp_dmac_bind,
 };
 
-const struct nv50_disp_dmac_oclass
-gp102_disp_core_oclass = {
-	.base.oclass = GP102_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &gp102_disp_core_func,
-	.mthd = &gk104_disp_core_chan_mthd,
-	.chid = 0,
-};
+int
+gp102_disp_core_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+		    struct nv50_disp *disp, struct nvkm_object **pobject)
+{
+	return nv50_disp_core_new_(&gp102_disp_core_func, &gk104_disp_core_mthd,
+				   disp, 0, oclass, argv, argc, pobject);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt200.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt200.c
deleted file mode 100644
index b234547708fc..000000000000
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt200.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2015 Red Hat Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors: Ben Skeggs <bskeggs@redhat.com>
- */
-#include "dmacnv50.h"
-#include "rootnv50.h"
-
-#include <nvif/class.h>
-
-const struct nv50_disp_dmac_oclass
-gt200_disp_core_oclass = {
-	.base.oclass = GT200_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &nv50_disp_core_func,
-	.mthd = &g84_disp_core_chan_mthd,
-	.chid = 0,
-};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt215.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt215.c
deleted file mode 100644
index 8f5ba2018975..000000000000
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/coregt215.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2015 Red Hat Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors: Ben Skeggs <bskeggs@redhat.com>
- */
-#include "dmacnv50.h"
-#include "rootnv50.h"
-
-#include <nvif/class.h>
-
-const struct nv50_disp_dmac_oclass
-gt215_disp_core_oclass = {
-	.base.oclass = GT214_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &nv50_disp_core_func,
-	.mthd = &g94_disp_core_chan_mthd,
-	.chid = 0,
-};
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/corenv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/corenv50.c
index 839cbc83428c..8cdcf5b590e7 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/corenv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/corenv50.c
@@ -22,31 +22,29 @@
  * Authors: Ben Skeggs
  */
 #include "dmacnv50.h"
-#include "rootnv50.h"
 
 #include <core/client.h>
 #include <subdev/timer.h>
 
-#include <nvif/class.h>
 #include <nvif/cl507d.h>
 #include <nvif/unpack.h>
 
 int
-nv50_disp_core_new(const struct nv50_disp_dmac_func *func,
-		   const struct nv50_disp_chan_mthd *mthd,
-		   struct nv50_disp_root *root, int chid,
-		   const struct nvkm_oclass *oclass, void *data, u32 size,
-		   struct nvkm_object **pobject)
+nv50_disp_core_new_(const struct nv50_disp_dmac_func *func,
+		    const struct nv50_disp_chan_mthd *mthd,
+		    struct nv50_disp *disp, int chid,
+		    const struct nvkm_oclass *oclass, void *argv, u32 argc,
+		    struct nvkm_object **pobject)
 {
 	union {
 		struct nv50_disp_core_channel_dma_v0 v0;
-	} *args = data;
+	} *args = argv;
 	struct nvkm_object *parent = oclass->parent;
 	u64 push;
 	int ret = -ENOSYS;
 
-	nvif_ioctl(parent, "create disp core channel dma size %d\n", size);
-	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
+	nvif_ioctl(parent, "create disp core channel dma size %d\n", argc);
+	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
 		nvif_ioctl(parent, "create disp core channel dma vers %d "
 				   "pushbuf %016llx\n",
 			   args->v0.version, args->v0.pushbuf);
@@ -54,7 +52,7 @@ nv50_disp_core_new(const struct nv50_disp_dmac_func *func,
 	} else
 		return ret;
 
-	return nv50_disp_dmac_new_(func, mthd, root->disp, chid, 0,
+	return nv50_disp_dmac_new_(func, mthd, disp, chid, 0,
 				   push, oclass, pobject);
 }
 
@@ -151,7 +149,7 @@ nv50_disp_core_mthd_head = {
 };
 
 static const struct nv50_disp_chan_mthd
-nv50_disp_core_chan_mthd = {
+nv50_disp_core_mthd = {
 	.name = "Core",
 	.addr = 0x000000,
 	.prev = 0x000004,
@@ -231,13 +229,10 @@ nv50_disp_core_func = {
 	.bind = nv50_disp_dmac_bind,
 };
 
-const struct nv50_disp_dmac_oclass
-nv50_disp_core_oclass = {
-	.base.oclass = NV50_DISP_CORE_CHANNEL_DMA,
-	.base.minver = 0,
-	.base.maxver = 0,
-	.ctor = nv50_disp_core_new,
-	.func = &nv50_disp_core_func,
-	.mthd = &nv50_disp_core_chan_mthd,
-	.chid = 0,
-};
+int
+nv50_disp_core_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+		   struct nv50_disp *disp, struct nvkm_object **pobject)
+{
+	return nv50_disp_core_new_(&nv50_disp_core_func, &nv50_disp_core_mthd,
+				   disp, 0, oclass, argv, argc, pobject);
+}
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.h
index ae094c7c47f5..feeb5882dc91 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dmacnv50.h
@@ -32,46 +32,4 @@ extern const struct nv50_disp_dmac_func gf119_disp_core_func;
 void gf119_disp_core_fini(struct nv50_disp_dmac *);
 
 extern const struct nv50_disp_dmac_func gp102_disp_dmac_func;
-
-struct nv50_disp_dmac_oclass {
-	int (*ctor)(const struct nv50_disp_dmac_func *,
-		    const struct nv50_disp_chan_mthd *,
-		    struct nv50_disp_root *, int chid,
-		    const struct nvkm_oclass *, void *data, u32 size,
-		    struct nvkm_object **);
-	struct nvkm_sclass base;
-	const struct nv50_disp_dmac_func *func;
-	const struct nv50_disp_chan_mthd *mthd;
-	int chid;
-};
-
-int nv50_disp_core_new(const struct nv50_disp_dmac_func *,
-		       const struct nv50_disp_chan_mthd *,
-		       struct nv50_disp_root *, int chid,
-		       const struct nvkm_oclass *oclass, void *data, u32 size,
-		       struct nvkm_object **);
-
-extern const struct nv50_disp_dmac_oclass nv50_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass g84_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass g94_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass gt200_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass gt215_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass gf119_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass gk104_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass gk110_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass gm107_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass gm200_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass gp100_disp_core_oclass;
-
-extern const struct nv50_disp_dmac_oclass gp102_disp_core_oclass;
 #endif
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
index 1d2280ab3194..4a37c44fcbed 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
@@ -24,6 +24,7 @@
 #include "nv50.h"
 #include "head.h"
 #include "ior.h"
+#include "channv50.h"
 #include "rootnv50.h"
 
 #include <core/client.h>
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg84.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg84.c
index 0f7e662cd175..e51f89f32507 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg84.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 g84_disp_root = {
-	.dmac = {
-		&g84_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,G82_DISP_CURSOR             }, nv50_disp_curs_new },
 		{{0,0,G82_DISP_OVERLAY            }, nv50_disp_oimm_new },
 		{{0,0,G82_DISP_BASE_CHANNEL_DMA   },  g84_disp_base_new },
+		{{0,0,G82_DISP_CORE_CHANNEL_DMA   },  g84_disp_core_new },
 		{{0,0,G82_DISP_OVERLAY_CHANNEL_DMA},  g84_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg94.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg94.c
index 20709d6e8a8b..ed7838eedb2c 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg94.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootg94.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 g94_disp_root = {
-	.dmac = {
-		&g94_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,  G82_DISP_CURSOR             },  nv50_disp_curs_new },
 		{{0,0,  G82_DISP_OVERLAY            },  nv50_disp_oimm_new },
 		{{0,0,GT200_DISP_BASE_CHANNEL_DMA   },   g84_disp_base_new },
+		{{0,0,GT206_DISP_CORE_CHANNEL_DMA   },   g94_disp_core_new },
 		{{0,0,GT200_DISP_OVERLAY_CHANNEL_DMA}, gt200_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgf119.c
index 1161698dbb4e..ac92e65131c9 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgf119.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgf119.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 gf119_disp_root = {
-	.dmac = {
-		&gf119_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,GF110_DISP_CURSOR             }, gf119_disp_curs_new },
 		{{0,0,GF110_DISP_OVERLAY            }, gf119_disp_oimm_new },
 		{{0,0,GF110_DISP_BASE_CHANNEL_DMA   }, gf119_disp_base_new },
+		{{0,0,GF110_DISP_CORE_CHANNEL_DMA   }, gf119_disp_core_new },
 		{{0,0,GF110_DISP_OVERLAY_CONTROL_DMA}, gf119_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk104.c
index 15379ff5ebf4..3bb6d601aed2 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk104.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk104.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 gk104_disp_root = {
-	.dmac = {
-		&gk104_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,GK104_DISP_CURSOR             }, gf119_disp_curs_new },
 		{{0,0,GK104_DISP_OVERLAY            }, gf119_disp_oimm_new },
 		{{0,0,GK104_DISP_BASE_CHANNEL_DMA   }, gf119_disp_base_new },
+		{{0,0,GK104_DISP_CORE_CHANNEL_DMA   }, gk104_disp_core_new },
 		{{0,0,GK104_DISP_OVERLAY_CONTROL_DMA}, gk104_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk110.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk110.c
index 0a47674f6541..336419815d98 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk110.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgk110.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 gk110_disp_root = {
-	.dmac = {
-		&gk110_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,GK104_DISP_CURSOR             }, gf119_disp_curs_new },
 		{{0,0,GK104_DISP_OVERLAY            }, gf119_disp_oimm_new },
 		{{0,0,GK110_DISP_BASE_CHANNEL_DMA   }, gf119_disp_base_new },
+		{{0,0,GK110_DISP_CORE_CHANNEL_DMA   }, gk104_disp_core_new },
 		{{0,0,GK104_DISP_OVERLAY_CONTROL_DMA}, gk104_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm107.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm107.c
index 819521e25717..c53e71ee69e7 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm107.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm107.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 gm107_disp_root = {
-	.dmac = {
-		&gm107_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,GK104_DISP_CURSOR             }, gf119_disp_curs_new },
 		{{0,0,GK104_DISP_OVERLAY            }, gf119_disp_oimm_new },
 		{{0,0,GK110_DISP_BASE_CHANNEL_DMA   }, gf119_disp_base_new },
+		{{0,0,GM107_DISP_CORE_CHANNEL_DMA   }, gk104_disp_core_new },
 		{{0,0,GK104_DISP_OVERLAY_CONTROL_DMA}, gk104_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm200.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm200.c
index 0dca1772bf33..85409d1bc7bc 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm200.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgm200.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 gm200_disp_root = {
-	.dmac = {
-		&gm200_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,GK104_DISP_CURSOR             }, gf119_disp_curs_new },
 		{{0,0,GK104_DISP_OVERLAY            }, gf119_disp_oimm_new },
 		{{0,0,GK110_DISP_BASE_CHANNEL_DMA   }, gf119_disp_base_new },
+		{{0,0,GM200_DISP_CORE_CHANNEL_DMA   }, gk104_disp_core_new },
 		{{0,0,GK104_DISP_OVERLAY_CONTROL_DMA}, gk104_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgp100.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgp100.c
index 6fcf8583b819..ebfd245c573a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgp100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgp100.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 gp100_disp_root = {
-	.dmac = {
-		&gp100_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,GK104_DISP_CURSOR             }, gf119_disp_curs_new },
 		{{0,0,GK104_DISP_OVERLAY            }, gf119_disp_oimm_new },
 		{{0,0,GK110_DISP_BASE_CHANNEL_DMA   }, gf119_disp_base_new },
+		{{0,0,GP100_DISP_CORE_CHANNEL_DMA   }, gk104_disp_core_new },
 		{{0,0,GK104_DISP_OVERLAY_CONTROL_DMA}, gk104_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgp102.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgp102.c
index bf5cbc32120d..54b5fda99208 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgp102.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgp102.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 gp102_disp_root = {
-	.dmac = {
-		&gp102_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,GK104_DISP_CURSOR             }, gp102_disp_curs_new },
 		{{0,0,GK104_DISP_OVERLAY            }, gp102_disp_oimm_new },
 		{{0,0,GK110_DISP_BASE_CHANNEL_DMA   }, gp102_disp_base_new },
+		{{0,0,GP102_DISP_CORE_CHANNEL_DMA   }, gp102_disp_core_new },
 		{{0,0,GK104_DISP_OVERLAY_CONTROL_DMA}, gp102_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt200.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt200.c
index 2bd3f36475e3..14ac83bf3693 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt200.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt200.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 gt200_disp_root = {
-	.dmac = {
-		&gt200_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,  G82_DISP_CURSOR             },  nv50_disp_curs_new },
 		{{0,0,  G82_DISP_OVERLAY            },  nv50_disp_oimm_new },
 		{{0,0,GT200_DISP_BASE_CHANNEL_DMA   },   g84_disp_base_new },
+		{{0,0,GT200_DISP_CORE_CHANNEL_DMA   },   g84_disp_core_new },
 		{{0,0,GT200_DISP_OVERLAY_CHANNEL_DMA}, gt200_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt215.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt215.c
index aa4c52355e88..cb1a208e68bd 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt215.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgt215.c
@@ -28,13 +28,11 @@
 
 static const struct nv50_disp_root_func
 gt215_disp_root = {
-	.dmac = {
-		&gt215_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,GT214_DISP_CURSOR             },  nv50_disp_curs_new },
 		{{0,0,GT214_DISP_OVERLAY            },  nv50_disp_oimm_new },
 		{{0,0,GT214_DISP_BASE_CHANNEL_DMA   },   g84_disp_base_new },
+		{{0,0,GT214_DISP_CORE_CHANNEL_DMA   },   g94_disp_core_new },
 		{{0,0,GT214_DISP_OVERLAY_CHANNEL_DMA},   g84_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c
index 24e8b418ac65..9d716ee7621e 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c
@@ -269,16 +269,6 @@ nv50_disp_root_mthd_(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 }
 
 static int
-nv50_disp_root_dmac_new_(const struct nvkm_oclass *oclass,
-			 void *data, u32 size, struct nvkm_object **pobject)
-{
-	const struct nv50_disp_dmac_oclass *sclass = oclass->priv;
-	struct nv50_disp_root *root = nv50_disp_root(oclass->parent);
-	return sclass->ctor(sclass->func, sclass->mthd, root, sclass->chid,
-			    oclass, data, size, pobject);
-}
-
-static int
 nv50_disp_root_child_new_(const struct nvkm_oclass *oclass,
 			  void *argv, u32 argc, struct nvkm_object **pobject)
 {
@@ -293,15 +283,6 @@ nv50_disp_root_child_get_(struct nvkm_object *object, int index,
 {
 	struct nv50_disp_root *root = nv50_disp_root(object);
 
-	if (index < ARRAY_SIZE(root->func->dmac)) {
-		sclass->base = root->func->dmac[index]->base;
-		sclass->priv = root->func->dmac[index];
-		sclass->ctor = nv50_disp_root_dmac_new_;
-		return 0;
-	}
-
-	index -= ARRAY_SIZE(root->func->dmac);
-
 	if (root->func->user[index].ctor) {
 		sclass->base = root->func->user[index].base;
 		sclass->priv = root->func->user + index;
@@ -347,13 +328,11 @@ nv50_disp_root_new_(const struct nv50_disp_root_func *func,
 
 static const struct nv50_disp_root_func
 nv50_disp_root = {
-	.dmac = {
-		&nv50_disp_core_oclass,
-	},
 	.user = {
 		{{0,0,NV50_DISP_CURSOR             }, nv50_disp_curs_new },
 		{{0,0,NV50_DISP_OVERLAY            }, nv50_disp_oimm_new },
 		{{0,0,NV50_DISP_BASE_CHANNEL_DMA   }, nv50_disp_base_new },
+		{{0,0,NV50_DISP_CORE_CHANNEL_DMA   }, nv50_disp_core_new },
 		{{0,0,NV50_DISP_OVERLAY_CHANNEL_DMA}, nv50_disp_ovly_new },
 		{}
 	},
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.h
index 484868af6597..12fc13b397ed 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.h
@@ -12,7 +12,7 @@ struct nv50_disp_root {
 };
 
 struct nv50_disp_root_func {
-	const struct nv50_disp_dmac_oclass *dmac[1];
+	int blah;
 	struct nv50_disp_user {
 		struct nvkm_sclass base;
 		int (*ctor)(const struct nvkm_oclass *, void *argv, u32 argc,