drm/nouveau/devinit/tu102-: prepare for GSP-RM

- add R535 implementation of DEVINIT, we need some of this for boot
- add display disable fuse for ga100-

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230918202149.4343-9-skeggsb@gmail.com

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/Kbuild

@@ -16,3 +16,5 @@ nvkm-y += nvkm/subdev/devinit/gm200.o
 nvkm-y += nvkm/subdev/devinit/gv100.o
 nvkm-y += nvkm/subdev/devinit/tu102.o
 nvkm-y += nvkm/subdev/devinit/ga100.o
+
+nvkm-y += nvkm/subdev/devinit/r535.o

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/ga100.c

@@ -24,6 +24,7 @@
 #include <subdev/bios.h>
 #include <subdev/bios/pll.h>
 #include <subdev/clk/pll.h>
+#include <subdev/gsp.h>
 
 static int
 ga100_devinit_pll_set(struct nvkm_devinit *init, u32 type, u32 freq)
@@ -62,8 +63,19 @@ ga100_devinit_pll_set(struct nvkm_devinit *init, u32 type, u32 freq)
 	return ret;
 }
 
+static void
+ga100_devinit_disable(struct nvkm_devinit *init)
+{
+	struct nvkm_device *device = init->subdev.device;
+	u32 r820c04 = nvkm_rd32(device, 0x820c04);
+
+	if (r820c04 & 0x00000001)
+		nvkm_subdev_disable(device, NVKM_ENGINE_DISP, 0);
+}
+
 static const struct nvkm_devinit_func
 ga100_devinit = {
+	.disable = ga100_devinit_disable,
 	.init = nv50_devinit_init,
 	.post = tu102_devinit_post,
 	.pll_set = ga100_devinit_pll_set,
@@ -73,5 +85,8 @@ int
 ga100_devinit_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 		  struct nvkm_devinit **pinit)
 {
+	if (nvkm_gsp_rm(device->gsp))
+		return r535_devinit_new(&ga100_devinit, device, type, inst, pinit);
+
 	return nv50_devinit_new_(&ga100_devinit, device, type, inst, pinit);
 }

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/priv.h

@@ -4,6 +4,9 @@
 #define nvkm_devinit(p) container_of((p), struct nvkm_devinit, subdev)
 #include <subdev/devinit.h>
 
+int r535_devinit_new(const struct nvkm_devinit_func *,
+		     struct nvkm_device *, enum nvkm_subdev_type, int, struct nvkm_devinit **);
+
 struct nvkm_devinit_func {
 	void *(*dtor)(struct nvkm_devinit *);
 	void (*preinit)(struct nvkm_devinit *);

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/r535.c

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2023 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.
+ */
+#include "nv50.h"
+
+static void *
+r535_devinit_dtor(struct nvkm_devinit *devinit)
+{
+	kfree(devinit->func);
+	return devinit;
+}
+
+int
+r535_devinit_new(const struct nvkm_devinit_func *hw,
+		 struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+		 struct nvkm_devinit **pdevinit)
+{
+	struct nvkm_devinit_func *rm;
+	int ret;
+
+	if (!(rm = kzalloc(sizeof(*rm), GFP_KERNEL)))
+		return -ENOMEM;
+
+	rm->dtor = r535_devinit_dtor;
+	rm->post = hw->post;
+	rm->disable = hw->disable;
+
+	ret = nv50_devinit_new_(rm, device, type, inst, pdevinit);
+	if (ret)
+		kfree(rm);
+
+	return ret;
+}

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/tu102.c

@@ -24,6 +24,7 @@
 #include <subdev/bios.h>
 #include <subdev/bios/pll.h>
 #include <subdev/clk/pll.h>
+#include <subdev/gsp.h>
 
 static int
 tu102_devinit_pll_set(struct nvkm_devinit *init, u32 type, u32 freq)
@@ -100,5 +101,8 @@ int
 tu102_devinit_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 		  struct nvkm_devinit **pinit)
 {
+	if (nvkm_gsp_rm(device->gsp))
+		return r535_devinit_new(&tu102_devinit, device, type, inst, pinit);
+
 	return nv50_devinit_new_(&tu102_devinit, device, type, inst, pinit);
 }