drm/nouveau/fb/gk20a,gm20b: setup mmu debug buffer registers at init()

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

drivers/gpu/drm/nouveau/nvkm/engine/gr/gk20a.c

@@ -22,7 +22,6 @@
 #include "gf100.h"
 #include "ctxgf100.h"
 
-#include <subdev/fb.h>
 #include <subdev/timer.h>
 
 #include <nvif/class.h>
@@ -220,7 +219,6 @@ int
 gk20a_gr_init(struct gf100_gr *gr)
 {
 	struct nvkm_device *device = gr->base.engine.subdev.device;
-	struct nvkm_fb *fb = device->fb;
 	const u32 magicgpc918 = DIV_ROUND_UP(0x00800000, gr->tpc_total);
 	u32 data[TPC_MAX / 8] = {};
 	u8  tpcnr[GPC_MAX];
@@ -241,9 +239,6 @@ gk20a_gr_init(struct gf100_gr *gr)
 		return ret;
 
 	/* MMU debug buffer */
-	nvkm_wr32(device, 0x100cc8, nvkm_memory_addr(fb->mmu_wr) >> 8);
-	nvkm_wr32(device, 0x100ccc, nvkm_memory_addr(fb->mmu_rd) >> 8);
-
 	if (gr->func->init_gpc_mmu)
 		gr->func->init_gpc_mmu(gr);
 

drivers/gpu/drm/nouveau/nvkm/subdev/fb/gk20a.c

@@ -21,11 +21,15 @@
  */
 #include "priv.h"
 
+#include <core/memory.h>
+
 static void
 gk20a_fb_init(struct nvkm_fb *fb)
 {
 	struct nvkm_device *device = fb->subdev.device;
 	nvkm_mask(device, 0x100c80, 0x00000001, 0x00000000); /* 128KiB lpg */
+	nvkm_wr32(device, 0x100cc8, nvkm_memory_addr(fb->mmu_wr) >> 8);
+	nvkm_wr32(device, 0x100ccc, nvkm_memory_addr(fb->mmu_rd) >> 8);
 }
 
 static const struct nvkm_fb_func