diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/hdanva3.c b/drivers/gpu/drm/nouveau/core/engine/disp/hdanva3.c
index 373dbcc523b2..a19e7d79b847 100644
--- a/drivers/gpu/drm/nouveau/core/engine/disp/hdanva3.c
+++ b/drivers/gpu/drm/nouveau/core/engine/disp/hdanva3.c
@@ -36,6 +36,8 @@ nva3_hda_eld(struct nv50_disp_priv *priv, int or, u8 *data, u32 size)
 	if (data && data[0]) {
 		for (i = 0; i < size; i++)
 			nv_wr32(priv, 0x61c440 + soff, (i << 8) | data[i]);
+		for (; i < 0x60; i++)
+			nv_wr32(priv, 0x61c440 + soff, (i << 8));
 		nv_mask(priv, 0x61c448 + soff, 0x80000003, 0x80000003);
 	} else
 	if (data) {
diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/hdanvd0.c b/drivers/gpu/drm/nouveau/core/engine/disp/hdanvd0.c
index dc57e24fc1df..717639386ced 100644
--- a/drivers/gpu/drm/nouveau/core/engine/disp/hdanvd0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/disp/hdanvd0.c
@@ -41,6 +41,8 @@ nvd0_hda_eld(struct nv50_disp_priv *priv, int or, u8 *data, u32 size)
 	if (data && data[0]) {
 		for (i = 0; i < size; i++)
 			nv_wr32(priv, 0x10ec00 + soff, (i << 8) | data[i]);
+		for (; i < 0x60; i++)
+			nv_wr32(priv, 0x10ec00 + soff, (i << 8));
 		nv_mask(priv, 0x10ec10 + soff, 0x80000003, 0x80000003);
 	} else
 	if (data) {
diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/sornv50.c b/drivers/gpu/drm/nouveau/core/engine/disp/sornv50.c
index ab1e918469a8..526b75242899 100644
--- a/drivers/gpu/drm/nouveau/core/engine/disp/sornv50.c
+++ b/drivers/gpu/drm/nouveau/core/engine/disp/sornv50.c
@@ -47,14 +47,8 @@ int
 nv50_sor_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
 {
 	struct nv50_disp_priv *priv = (void *)object->engine;
-	struct nouveau_bios *bios = nouveau_bios(priv);
-	const u16 type = (mthd & NV50_DISP_SOR_MTHD_TYPE) >> 12;
 	const u8  head = (mthd & NV50_DISP_SOR_MTHD_HEAD) >> 3;
-	const u8  link = (mthd & NV50_DISP_SOR_MTHD_LINK) >> 2;
 	const u8    or = (mthd & NV50_DISP_SOR_MTHD_OR);
-	const u16 mask = (0x0100 << head) | (0x0040 << link) | (0x0001 << or);
-	struct dcb_output outp;
-	u8  ver, hdr;
 	u32 data;
 	int ret = -EINVAL;
 
@@ -62,8 +56,6 @@ nv50_sor_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
 		return -EINVAL;
 	data = *(u32 *)args;
 
-	if (type && !dcb_outp_match(bios, type, mask, &ver, &hdr, &outp))
-		return -ENODEV;
 
 	switch (mthd & ~0x3f) {
 	case NV50_DISP_SOR_PWR:
diff --git a/drivers/gpu/drm/nouveau/core/engine/mpeg/nv31.c b/drivers/gpu/drm/nouveau/core/engine/mpeg/nv31.c
index 49ecbb859b25..c19004301309 100644
--- a/drivers/gpu/drm/nouveau/core/engine/mpeg/nv31.c
+++ b/drivers/gpu/drm/nouveau/core/engine/mpeg/nv31.c
@@ -265,8 +265,8 @@ nv31_mpeg_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 int
 nv31_mpeg_init(struct nouveau_object *object)
 {
-	struct nouveau_engine *engine = nv_engine(object->engine);
-	struct nv31_mpeg_priv *priv = (void *)engine;
+	struct nouveau_engine *engine = nv_engine(object);
+	struct nv31_mpeg_priv *priv = (void *)object;
 	struct nouveau_fb *pfb = nouveau_fb(object);
 	int ret, i;
 
@@ -284,7 +284,10 @@ nv31_mpeg_init(struct nouveau_object *object)
 	/* PMPEG init */
 	nv_wr32(priv, 0x00b32c, 0x00000000);
 	nv_wr32(priv, 0x00b314, 0x00000100);
-	nv_wr32(priv, 0x00b220, nv44_graph_class(priv) ? 0x00000044 : 0x00000031);
+	if (nv_device(priv)->chipset >= 0x40 && nv44_graph_class(priv))
+		nv_wr32(priv, 0x00b220, 0x00000044);
+	else
+		nv_wr32(priv, 0x00b220, 0x00000031);
 	nv_wr32(priv, 0x00b300, 0x02001ec1);
 	nv_mask(priv, 0x00b32c, 0x00000001, 0x00000001);
 
diff --git a/drivers/gpu/drm/nouveau/core/engine/mpeg/nv40.c b/drivers/gpu/drm/nouveau/core/engine/mpeg/nv40.c
index f7c581ad1991..dd6196072e9c 100644
--- a/drivers/gpu/drm/nouveau/core/engine/mpeg/nv40.c
+++ b/drivers/gpu/drm/nouveau/core/engine/mpeg/nv40.c
@@ -61,6 +61,7 @@ nv40_mpeg_context_ctor(struct nouveau_object *parent,
 	if (ret)
 		return ret;
 
+	nv_wo32(&chan->base.base, 0x78, 0x02001ec1);
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/nouveau/core/engine/xtensa.c b/drivers/gpu/drm/nouveau/core/engine/xtensa.c
index 0639bc59d0a5..5f6ede7c4892 100644
--- a/drivers/gpu/drm/nouveau/core/engine/xtensa.c
+++ b/drivers/gpu/drm/nouveau/core/engine/xtensa.c
@@ -118,7 +118,13 @@ _nouveau_xtensa_init(struct nouveau_object *object)
 			return ret;
 		}
 
-		ret = nouveau_gpuobj_new(object, NULL, fw->size, 0x1000, 0,
+		if (fw->size > 0x40000) {
+			nv_warn(xtensa, "firmware %s too large\n", name);
+			release_firmware(fw);
+			return -EINVAL;
+		}
+
+		ret = nouveau_gpuobj_new(object, NULL, 0x40000, 0x1000, 0,
 					 &xtensa->gpu_fw);
 		if (ret) {
 			release_firmware(fw);
diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/vm.h b/drivers/gpu/drm/nouveau/core/include/subdev/vm.h
index f2e87b105666..fcf57fa309bf 100644
--- a/drivers/gpu/drm/nouveau/core/include/subdev/vm.h
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/vm.h
@@ -55,7 +55,7 @@ struct nouveau_vma {
 struct nouveau_vm {
 	struct nouveau_vmmgr *vmm;
 	struct nouveau_mm mm;
-	int refcount;
+	struct kref refcount;
 
 	struct list_head pgd_list;
 	atomic_t engref[NVDEV_SUBDEV_NR];
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h b/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h
index 6c974dd83e8b..db9d6ddde52c 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/priv.h
@@ -81,7 +81,7 @@ void nv44_fb_tile_prog(struct nouveau_fb *, int, struct nouveau_fb_tile *);
 void nv46_fb_tile_init(struct nouveau_fb *, int i, u32 addr, u32 size,
 		       u32 pitch, u32 flags, struct nouveau_fb_tile *);
 
-void nv50_ram_put(struct nouveau_fb *, struct nouveau_mem **);
+void __nv50_ram_put(struct nouveau_fb *, struct nouveau_mem *);
 extern int nv50_fb_memtype[0x80];
 
 #endif
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv50.c b/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv50.c
index af5aa7ee8ad9..903baff77fdd 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv50.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv50.c
@@ -27,17 +27,10 @@
 #include "priv.h"
 
 void
-nv50_ram_put(struct nouveau_fb *pfb, struct nouveau_mem **pmem)
+__nv50_ram_put(struct nouveau_fb *pfb, struct nouveau_mem *mem)
 {
 	struct nouveau_mm_node *this;
-	struct nouveau_mem *mem;
 
-	mem = *pmem;
-	*pmem = NULL;
-	if (unlikely(mem == NULL))
-		return;
-
-	mutex_lock(&pfb->base.mutex);
 	while (!list_empty(&mem->regions)) {
 		this = list_first_entry(&mem->regions, typeof(*this), rl_entry);
 
@@ -46,6 +39,19 @@ nv50_ram_put(struct nouveau_fb *pfb, struct nouveau_mem **pmem)
 	}
 
 	nouveau_mm_free(&pfb->tags, &mem->tag);
+}
+
+void
+nv50_ram_put(struct nouveau_fb *pfb, struct nouveau_mem **pmem)
+{
+	struct nouveau_mem *mem = *pmem;
+
+	*pmem = NULL;
+	if (unlikely(mem == NULL))
+		return;
+
+	mutex_lock(&pfb->base.mutex);
+	__nv50_ram_put(pfb, mem);
 	mutex_unlock(&pfb->base.mutex);
 
 	kfree(mem);
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/ramnvc0.c b/drivers/gpu/drm/nouveau/core/subdev/fb/ramnvc0.c
index 9c3634acbb9d..cf97c4de4a6b 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/ramnvc0.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/ramnvc0.c
@@ -33,11 +33,19 @@ void
 nvc0_ram_put(struct nouveau_fb *pfb, struct nouveau_mem **pmem)
 {
 	struct nouveau_ltcg *ltcg = nouveau_ltcg(pfb);
+	struct nouveau_mem *mem = *pmem;
 
-	if ((*pmem)->tag)
-		ltcg->tags_free(ltcg, &(*pmem)->tag);
+	*pmem = NULL;
+	if (unlikely(mem == NULL))
+		return;
 
-	nv50_ram_put(pfb, pmem);
+	mutex_lock(&pfb->base.mutex);
+	if (mem->tag)
+		ltcg->tags_free(ltcg, &mem->tag);
+	__nv50_ram_put(pfb, mem);
+	mutex_unlock(&pfb->base.mutex);
+
+	kfree(mem);
 }
 
 int
diff --git a/drivers/gpu/drm/nouveau/core/subdev/gpio/nv50.c b/drivers/gpu/drm/nouveau/core/subdev/gpio/nv50.c
index bf489dcf46e2..c4c1d415e7fe 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/gpio/nv50.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/gpio/nv50.c
@@ -103,7 +103,7 @@ nv50_gpio_intr(struct nouveau_subdev *subdev)
 	int i;
 
 	intr0 = nv_rd32(priv, 0xe054) & nv_rd32(priv, 0xe050);
-	if (nv_device(priv)->chipset >= 0x90)
+	if (nv_device(priv)->chipset > 0x92)
 		intr1 = nv_rd32(priv, 0xe074) & nv_rd32(priv, 0xe070);
 
 	hi = (intr0 & 0x0000ffff) | (intr1 << 16);
@@ -115,7 +115,7 @@ nv50_gpio_intr(struct nouveau_subdev *subdev)
 	}
 
 	nv_wr32(priv, 0xe054, intr0);
-	if (nv_device(priv)->chipset >= 0x90)
+	if (nv_device(priv)->chipset > 0x92)
 		nv_wr32(priv, 0xe074, intr1);
 }
 
@@ -146,7 +146,7 @@ nv50_gpio_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	int ret;
 
 	ret = nouveau_gpio_create(parent, engine, oclass,
-				  nv_device(parent)->chipset >= 0x90 ? 32 : 16,
+				  nv_device(parent)->chipset > 0x92 ? 32 : 16,
 				  &priv);
 	*pobject = nv_object(priv);
 	if (ret)
@@ -182,7 +182,7 @@ nv50_gpio_init(struct nouveau_object *object)
 	/* disable, and ack any pending gpio interrupts */
 	nv_wr32(priv, 0xe050, 0x00000000);
 	nv_wr32(priv, 0xe054, 0xffffffff);
-	if (nv_device(priv)->chipset >= 0x90) {
+	if (nv_device(priv)->chipset > 0x92) {
 		nv_wr32(priv, 0xe070, 0x00000000);
 		nv_wr32(priv, 0xe074, 0xffffffff);
 	}
@@ -195,7 +195,7 @@ nv50_gpio_fini(struct nouveau_object *object, bool suspend)
 {
 	struct nv50_gpio_priv *priv = (void *)object;
 	nv_wr32(priv, 0xe050, 0x00000000);
-	if (nv_device(priv)->chipset >= 0x90)
+	if (nv_device(priv)->chipset > 0x92)
 		nv_wr32(priv, 0xe070, 0x00000000);
 	return nouveau_gpio_fini(&priv->base, suspend);
 }
diff --git a/drivers/gpu/drm/nouveau/core/subdev/mc/nv50.c b/drivers/gpu/drm/nouveau/core/subdev/mc/nv50.c
index 0cb322a5e72c..f25fc5fc7dd1 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/mc/nv50.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/mc/nv50.c
@@ -41,7 +41,7 @@ nv50_mc_intr[] = {
 	{ 0x04000000, NVDEV_ENGINE_DISP },
 	{ 0x10000000, NVDEV_SUBDEV_BUS },
 	{ 0x80000000, NVDEV_ENGINE_SW },
-	{ 0x0000d101, NVDEV_SUBDEV_FB },
+	{ 0x0002d101, NVDEV_SUBDEV_FB },
 	{},
 };
 
diff --git a/drivers/gpu/drm/nouveau/core/subdev/vm/base.c b/drivers/gpu/drm/nouveau/core/subdev/vm/base.c
index 67fcb6c852ac..ef3133e7575c 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/vm/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/vm/base.c
@@ -361,7 +361,7 @@ nouveau_vm_create(struct nouveau_vmmgr *vmm, u64 offset, u64 length,
 
 	INIT_LIST_HEAD(&vm->pgd_list);
 	vm->vmm = vmm;
-	vm->refcount = 1;
+	kref_init(&vm->refcount);
 	vm->fpde = offset >> (vmm->pgt_bits + 12);
 	vm->lpde = (offset + length - 1) >> (vmm->pgt_bits + 12);
 
@@ -441,8 +441,9 @@ nouveau_vm_unlink(struct nouveau_vm *vm, struct nouveau_gpuobj *mpgd)
 }
 
 static void
-nouveau_vm_del(struct nouveau_vm *vm)
+nouveau_vm_del(struct kref *kref)
 {
+	struct nouveau_vm *vm = container_of(kref, typeof(*vm), refcount);
 	struct nouveau_vm_pgd *vpgd, *tmp;
 
 	list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) {
@@ -458,27 +459,19 @@ int
 nouveau_vm_ref(struct nouveau_vm *ref, struct nouveau_vm **ptr,
 	       struct nouveau_gpuobj *pgd)
 {
-	struct nouveau_vm *vm;
-	int ret;
-
-	vm = ref;
-	if (vm) {
-		ret = nouveau_vm_link(vm, pgd);
+	if (ref) {
+		int ret = nouveau_vm_link(ref, pgd);
 		if (ret)
 			return ret;
 
-		vm->refcount++;
+		kref_get(&ref->refcount);
+	}
+
+	if (*ptr) {
+		nouveau_vm_unlink(*ptr, pgd);
+		kref_put(&(*ptr)->refcount, nouveau_vm_del);
 	}
 
-	vm = *ptr;
 	*ptr = ref;
-
-	if (vm) {
-		nouveau_vm_unlink(vm, pgd);
-
-		if (--vm->refcount == 0)
-			nouveau_vm_del(vm);
-	}
-
 	return 0;
 }
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 4e7ee5f4155c..af20fba3a1a4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -198,7 +198,12 @@ nouveau_bo_new(struct drm_device *dev, int size, int align,
 	size_t acc_size;
 	int ret;
 	int type = ttm_bo_type_device;
-	int max_size = INT_MAX & ~((1 << drm->client.base.vm->vmm->lpg_shift) - 1);
+	int lpg_shift = 12;
+	int max_size;
+
+	if (drm->client.base.vm)
+		lpg_shift = drm->client.base.vm->vmm->lpg_shift;
+	max_size = INT_MAX & ~((1 << lpg_shift) - 1);
 
 	if (size <= 0 || size > max_size) {
 		nv_warn(drm, "skipped size %x\n", (u32)size);
diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index 4c1bc061fae2..8f6d63d7edd3 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -398,7 +398,8 @@ void
 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
-	drm_fb_helper_hotplug_event(&drm->fbcon->helper);
+	if (drm->fbcon)
+		drm_fb_helper_hotplug_event(&drm->fbcon->helper);
 }
 
 static int
diff --git a/drivers/gpu/drm/nouveau/nv17_fence.c b/drivers/gpu/drm/nouveau/nv17_fence.c
index 8e47a9bae8c3..22aa9963ea6f 100644
--- a/drivers/gpu/drm/nouveau/nv17_fence.c
+++ b/drivers/gpu/drm/nouveau/nv17_fence.c
@@ -76,7 +76,7 @@ nv17_fence_context_new(struct nouveau_channel *chan)
 	struct ttm_mem_reg *mem = &priv->bo->bo.mem;
 	struct nouveau_object *object;
 	u32 start = mem->start * PAGE_SIZE;
-	u32 limit = mem->start + mem->size - 1;
+	u32 limit = start + mem->size - 1;
 	int ret = 0;
 
 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
diff --git a/drivers/gpu/drm/nouveau/nv50_fence.c b/drivers/gpu/drm/nouveau/nv50_fence.c
index f9701e567db8..0ee363840035 100644
--- a/drivers/gpu/drm/nouveau/nv50_fence.c
+++ b/drivers/gpu/drm/nouveau/nv50_fence.c
@@ -39,6 +39,8 @@ nv50_fence_context_new(struct nouveau_channel *chan)
 	struct nv10_fence_chan *fctx;
 	struct ttm_mem_reg *mem = &priv->bo->bo.mem;
 	struct nouveau_object *object;
+	u32 start = mem->start * PAGE_SIZE;
+	u32 limit = start + mem->size - 1;
 	int ret, i;
 
 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
@@ -51,26 +53,28 @@ nv50_fence_context_new(struct nouveau_channel *chan)
 	fctx->base.sync = nv17_fence_sync;
 
 	ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
-				 NvSema, 0x0002,
+				 NvSema, 0x003d,
 				 &(struct nv_dma_class) {
 					.flags = NV_DMA_TARGET_VRAM |
 						 NV_DMA_ACCESS_RDWR,
-					.start = mem->start * PAGE_SIZE,
-					.limit = mem->size - 1,
+					.start = start,
+					.limit = limit,
 				 }, sizeof(struct nv_dma_class),
 				 &object);
 
 	/* dma objects for display sync channel semaphore blocks */
 	for (i = 0; !ret && i < dev->mode_config.num_crtc; i++) {
 		struct nouveau_bo *bo = nv50_display_crtc_sema(dev, i);
+		u32 start = bo->bo.mem.start * PAGE_SIZE;
+		u32 limit = start + bo->bo.mem.size - 1;
 
 		ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
 					 NvEvoSema0 + i, 0x003d,
 					 &(struct nv_dma_class) {
 						.flags = NV_DMA_TARGET_VRAM |
 							 NV_DMA_ACCESS_RDWR,
-						.start = bo->bo.offset,
-						.limit = bo->bo.offset + 0xfff,
+						.start = start,
+						.limit = limit,
 					 }, sizeof(struct nv_dma_class),
 					 &object);
 	}