text: /*
   * Copyright 2012 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
   */
  
  #include <core/object.h>
  #include <core/client.h>
  #include <core/parent.h>
  #include <core/handle.h>
  #include <core/enum.h>
  #include <nvif/unpack.h>
  #include <nvif/class.h>
  #include <nvif/event.h>
  
  #include <subdev/bios.h>
  #include <subdev/bios/dcb.h>
  #include <subdev/bios/disp.h>
  #include <subdev/bios/init.h>
  #include <subdev/bios/pll.h>
  #include <subdev/devinit.h>
  #include <subdev/timer.h>
  #include <subdev/fb.h>
  
  #include "nv50.h"
  
  /*******************************************************************************
   * EVO channel base class
   ******************************************************************************/
  
  static int
  nv50_disp_chan_create_(struct nouveau_object *parent,
  		       struct nouveau_object *engine,
  		       struct nouveau_oclass *oclass, int head,
  		       int length, void **pobject)
  {
  	const struct nv50_disp_chan_impl *impl = (void *)oclass->ofuncs;
  	struct nv50_disp_base *base = (void *)parent;
  	struct nv50_disp_chan *chan;
  	int chid = impl->chid + head;
  	int ret;
  
  	if (base->chan & (1 << chid))
  		return -EBUSY;
  	base->chan |= (1 << chid);
  
  	ret = nouveau_namedb_create_(parent, engine, oclass, 0, NULL,
  				     (1ULL << NVDEV_ENGINE_DMAOBJ),
  				     length, pobject);
  	chan = *pobject;
  	if (ret)
  		return ret;
  	chan->chid = chid;
  
  	nv_parent(chan)->object_attach = impl->attach;
  	nv_parent(chan)->object_detach = impl->detach;
  	return 0;
  }
  
  static void
  nv50_disp_chan_destroy(struct nv50_disp_chan *chan)
  {
  	struct nv50_disp_base *base = (void *)nv_object(chan)->parent;
  	base->chan &= ~(1 << chan->chid);
  	nouveau_namedb_destroy(&chan->base);
  }
  
  static void
  nv50_disp_chan_uevent_fini(struct nvkm_event *event, int type, int index)
  {
  	struct nv50_disp_priv *priv = container_of(event, typeof(*priv), uevent);
  	nv_mask(priv, 0x610028, 0x00000001 << index, 0x00000000 << index);
  	nv_wr32(priv, 0x610020, 0x00000001 << index);
  }
  
  static void
  nv50_disp_chan_uevent_init(struct nvkm_event *event, int types, int index)
  {
  	struct nv50_disp_priv *priv = container_of(event, typeof(*priv), uevent);
  	nv_wr32(priv, 0x610020, 0x00000001 << index);
  	nv_mask(priv, 0x610028, 0x00000001 << index, 0x00000001 << index);
  }
  
  void
  nv50_disp_chan_uevent_send(struct nv50_disp_priv *priv, int chid)
  {
  	struct nvif_notify_uevent_rep {
  	} rep;
  
  	nvkm_event_send(&priv->uevent, 1, chid, &rep, sizeof(rep));
  }
  
  int
  nv50_disp_chan_uevent_ctor(struct nouveau_object *object, void *data, u32 size,
  			   struct nvkm_notify *notify)
  {
  	struct nv50_disp_dmac *dmac = (void *)object;
  	union {
  		struct nvif_notify_uevent_req none;
  	} *args = data;
  	int ret;
  
  	if (nvif_unvers(args->none)) {
  		notify->size  = sizeof(struct nvif_notify_uevent_rep);
  		notify->types = 1;
  		notify->index = dmac->base.chid;
  		return 0;
  	}
  
  	return ret;
  }
  
  const struct nvkm_event_func
  nv50_disp_chan_uevent = {
  	.ctor = nv50_disp_chan_uevent_ctor,
  	.init = nv50_disp_chan_uevent_init,
  	.fini = nv50_disp_chan_uevent_fini,
  };
  
  int
  nv50_disp_chan_ntfy(struct nouveau_object *object, u32 type,
  		    struct nvkm_event **pevent)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	switch (type) {
  	case NV50_DISP_CORE_CHANNEL_DMA_V0_NTFY_UEVENT:
  		*pevent = &priv->uevent;
  		return 0;
  	default:
  		break;
  	}
  	return -EINVAL;
  }
  
  int
  nv50_disp_chan_map(struct nouveau_object *object, u64 *addr, u32 *size)
  {
  	struct nv50_disp_chan *chan = (void *)object;
  	*addr = nv_device_resource_start(nv_device(object), 0) +
  		0x640000 + (chan->chid * 0x1000);
  	*size = 0x001000;
  	return 0;
  }
  
  u32
  nv50_disp_chan_rd32(struct nouveau_object *object, u64 addr)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_chan *chan = (void *)object;
  	return nv_rd32(priv, 0x640000 + (chan->chid * 0x1000) + addr);
  }
  
  void
  nv50_disp_chan_wr32(struct nouveau_object *object, u64 addr, u32 data)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_chan *chan = (void *)object;
  	nv_wr32(priv, 0x640000 + (chan->chid * 0x1000) + addr, data);
  }
  
  /*******************************************************************************
   * EVO DMA channel base class
   ******************************************************************************/
  
  static int
  nv50_disp_dmac_object_attach(struct nouveau_object *parent,
  			     struct nouveau_object *object, u32 name)
  {
  	struct nv50_disp_base *base = (void *)parent->parent;
  	struct nv50_disp_chan *chan = (void *)parent;
  	u32 addr = nv_gpuobj(object)->node->offset;
  	u32 chid = chan->chid;
  	u32 data = (chid << 28) | (addr << 10) | chid;
  	return nouveau_ramht_insert(base->ramht, chid, name, data);
  }
  
  static void
  nv50_disp_dmac_object_detach(struct nouveau_object *parent, int cookie)
  {
  	struct nv50_disp_base *base = (void *)parent->parent;
  	nouveau_ramht_remove(base->ramht, cookie);
  }
  
  static int
  nv50_disp_dmac_create_(struct nouveau_object *parent,
  		       struct nouveau_object *engine,
  		       struct nouveau_oclass *oclass, u32 pushbuf, int head,
  		       int length, void **pobject)
  {
  	struct nv50_disp_dmac *dmac;
  	int ret;
  
  	ret = nv50_disp_chan_create_(parent, engine, oclass, head,
  				     length, pobject);
  	dmac = *pobject;
  	if (ret)
  		return ret;
  
  	dmac->pushdma = (void *)nouveau_handle_ref(parent, pushbuf);
  	if (!dmac->pushdma)
  		return -ENOENT;
  
  	switch (nv_mclass(dmac->pushdma)) {
  	case 0x0002:
  	case 0x003d:
  		if (dmac->pushdma->limit - dmac->pushdma->start != 0xfff)
  			return -EINVAL;
  
  		switch (dmac->pushdma->target) {
  		case NV_MEM_TARGET_VRAM:
  			dmac->push = 0x00000000 | dmac->pushdma->start >> 8;
  			break;
  		case NV_MEM_TARGET_PCI_NOSNOOP:
  			dmac->push = 0x00000003 | dmac->pushdma->start >> 8;
  			break;
  		default:
  			return -EINVAL;
  		}
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	return 0;
  }
  
  void
  nv50_disp_dmac_dtor(struct nouveau_object *object)
  {
  	struct nv50_disp_dmac *dmac = (void *)object;
  	nouveau_object_ref(NULL, (struct nouveau_object **)&dmac->pushdma);
  	nv50_disp_chan_destroy(&dmac->base);
  }
  
  static int
  nv50_disp_dmac_init(struct nouveau_object *object)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_dmac *dmac = (void *)object;
  	int chid = dmac->base.chid;
  	int ret;
  
  	ret = nv50_disp_chan_init(&dmac->base);
  	if (ret)
  		return ret;
  
  	/* enable error reporting */
  	nv_mask(priv, 0x610028, 0x00010000 << chid, 0x00010000 << chid);
  
  	/* initialise channel for dma command submission */
  	nv_wr32(priv, 0x610204 + (chid * 0x0010), dmac->push);
  	nv_wr32(priv, 0x610208 + (chid * 0x0010), 0x00010000);
  	nv_wr32(priv, 0x61020c + (chid * 0x0010), chid);
  	nv_mask(priv, 0x610200 + (chid * 0x0010), 0x00000010, 0x00000010);
  	nv_wr32(priv, 0x640000 + (chid * 0x1000), 0x00000000);
  	nv_wr32(priv, 0x610200 + (chid * 0x0010), 0x00000013);
  
  	/* wait for it to go inactive */
  	if (!nv_wait(priv, 0x610200 + (chid * 0x10), 0x80000000, 0x00000000)) {
  		nv_error(dmac, "init timeout, 0x%08x\n",
  			 nv_rd32(priv, 0x610200 + (chid * 0x10)));
  		return -EBUSY;
  	}
  
  	return 0;
  }
  
  static int
  nv50_disp_dmac_fini(struct nouveau_object *object, bool suspend)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_dmac *dmac = (void *)object;
  	int chid = dmac->base.chid;
  
  	/* deactivate channel */
  	nv_mask(priv, 0x610200 + (chid * 0x0010), 0x00001010, 0x00001000);
  	nv_mask(priv, 0x610200 + (chid * 0x0010), 0x00000003, 0x00000000);
  	if (!nv_wait(priv, 0x610200 + (chid * 0x10), 0x001e0000, 0x00000000)) {
  		nv_error(dmac, "fini timeout, 0x%08x\n",
  			 nv_rd32(priv, 0x610200 + (chid * 0x10)));
  		if (suspend)
  			return -EBUSY;
  	}
  
  	/* disable error reporting and completion notifications */
  	nv_mask(priv, 0x610028, 0x00010001 << chid, 0x00000000 << chid);
  
  	return nv50_disp_chan_fini(&dmac->base, suspend);
  }
  
  /*******************************************************************************
   * EVO master channel object
   ******************************************************************************/
  
  static void
  nv50_disp_mthd_list(struct nv50_disp_priv *priv, int debug, u32 base, int c,
  		    const struct nv50_disp_mthd_list *list, int inst)
  {
  	struct nouveau_object *disp = nv_object(priv);
  	int i;
  
  	for (i = 0; list->data[i].mthd; i++) {
  		if (list->data[i].addr) {
  			u32 next = nv_rd32(priv, list->data[i].addr + base + 0);
  			u32 prev = nv_rd32(priv, list->data[i].addr + base + c);
  			u32 mthd = list->data[i].mthd + (list->mthd * inst);
  			const char *name = list->data[i].name;
  			char mods[16];
  
  			if (prev != next)
  				snprintf(mods, sizeof(mods), "-> 0x%08x", next);
  			else
  				snprintf(mods, sizeof(mods), "%13c", ' ');
  
  			nv_printk_(disp, debug, "\t0x%04x: 0x%08x %s%s%s\n",
  				   mthd, prev, mods, name ? " // " : "",
  				   name ? name : "");
  		}
  	}
  }
  
  void
  nv50_disp_mthd_chan(struct nv50_disp_priv *priv, int debug, int head,
  		    const struct nv50_disp_mthd_chan *chan)
  {
  	struct nouveau_object *disp = nv_object(priv);
  	const struct nv50_disp_impl *impl = (void *)disp->oclass;
  	const struct nv50_disp_mthd_list *list;
  	int i, j;
  
  	if (debug > nv_subdev(priv)->debug)
  		return;
  
  	for (i = 0; (list = chan->data[i].mthd) != NULL; i++) {
  		u32 base = head * chan->addr;
  		for (j = 0; j < chan->data[i].nr; j++, base += list->addr) {
  			const char *cname = chan->name;
  			const char *sname = "";
  			char cname_[16], sname_[16];
  
  			if (chan->addr) {
  				snprintf(cname_, sizeof(cname_), "%s %d",
  					 chan->name, head);
  				cname = cname_;
  			}
  
  			if (chan->data[i].nr > 1) {
  				snprintf(sname_, sizeof(sname_), " - %s %d",
  					 chan->data[i].name, j);
  				sname = sname_;
  			}
  
  			nv_printk_(disp, debug, "%s%s:\n", cname, sname);
  			nv50_disp_mthd_list(priv, debug, base, impl->mthd.prev,
  					    list, j);
  		}
  	}
  }
  
  const struct nv50_disp_mthd_list
  nv50_disp_core_mthd_base = {
  	.mthd = 0x0000,
  	.addr = 0x000000,
  	.data = {
  		{ 0x0080, 0x000000 },
  		{ 0x0084, 0x610bb8 },
  		{ 0x0088, 0x610b9c },
  		{ 0x008c, 0x000000 },
  		{}
  	}
  };
  
  static const struct nv50_disp_mthd_list
  nv50_disp_core_mthd_dac = {
  	.mthd = 0x0080,
  	.addr = 0x000008,
  	.data = {
  		{ 0x0400, 0x610b58 },
  		{ 0x0404, 0x610bdc },
  		{ 0x0420, 0x610828 },
  		{}
  	}
  };
  
  const struct nv50_disp_mthd_list
  nv50_disp_core_mthd_sor = {
  	.mthd = 0x0040,
  	.addr = 0x000008,
  	.data = {
  		{ 0x0600, 0x610b70 },
  		{}
  	}
  };
  
  const struct nv50_disp_mthd_list
  nv50_disp_core_mthd_pior = {
  	.mthd = 0x0040,
  	.addr = 0x000008,
  	.data = {
  		{ 0x0700, 0x610b80 },
  		{}
  	}
  };
  
  static const struct nv50_disp_mthd_list
  nv50_disp_core_mthd_head = {
  	.mthd = 0x0400,
  	.addr = 0x000540,
  	.data = {
  		{ 0x0800, 0x610ad8 },
  		{ 0x0804, 0x610ad0 },
  		{ 0x0808, 0x610a48 },
  		{ 0x080c, 0x610a78 },
  		{ 0x0810, 0x610ac0 },
  		{ 0x0814, 0x610af8 },
  		{ 0x0818, 0x610b00 },
  		{ 0x081c, 0x610ae8 },
  		{ 0x0820, 0x610af0 },
  		{ 0x0824, 0x610b08 },
  		{ 0x0828, 0x610b10 },
  		{ 0x082c, 0x610a68 },
  		{ 0x0830, 0x610a60 },
  		{ 0x0834, 0x000000 },
  		{ 0x0838, 0x610a40 },
  		{ 0x0840, 0x610a24 },
  		{ 0x0844, 0x610a2c },
  		{ 0x0848, 0x610aa8 },
  		{ 0x084c, 0x610ab0 },
  		{ 0x0860, 0x610a84 },
  		{ 0x0864, 0x610a90 },
  		{ 0x0868, 0x610b18 },
  		{ 0x086c, 0x610b20 },
  		{ 0x0870, 0x610ac8 },
  		{ 0x0874, 0x610a38 },
  		{ 0x0880, 0x610a58 },
  		{ 0x0884, 0x610a9c },
  		{ 0x08a0, 0x610a70 },
  		{ 0x08a4, 0x610a50 },
  		{ 0x08a8, 0x610ae0 },
  		{ 0x08c0, 0x610b28 },
  		{ 0x08c4, 0x610b30 },
  		{ 0x08c8, 0x610b40 },
  		{ 0x08d4, 0x610b38 },
  		{ 0x08d8, 0x610b48 },
  		{ 0x08dc, 0x610b50 },
  		{ 0x0900, 0x610a18 },
  		{ 0x0904, 0x610ab8 },
  		{}
  	}
  };
  
  static const struct nv50_disp_mthd_chan
  nv50_disp_core_mthd_chan = {
  	.name = "Core",
  	.addr = 0x000000,
  	.data = {
  		{ "Global", 1, &nv50_disp_core_mthd_base },
  		{    "DAC", 3, &nv50_disp_core_mthd_dac  },
  		{    "SOR", 2, &nv50_disp_core_mthd_sor  },
  		{   "PIOR", 3, &nv50_disp_core_mthd_pior },
  		{   "HEAD", 2, &nv50_disp_core_mthd_head },
  		{}
  	}
  };
  
  int
  nv50_disp_core_ctor(struct nouveau_object *parent,
  		    struct nouveau_object *engine,
  		    struct nouveau_oclass *oclass, void *data, u32 size,
  		    struct nouveau_object **pobject)
  {
  	union {
  		struct nv50_disp_core_channel_dma_v0 v0;
  	} *args = data;
  	struct nv50_disp_dmac *mast;
  	int ret;
  
  	nv_ioctl(parent, "create disp core channel dma size %d\n", size);
  	if (nvif_unpack(args->v0, 0, 0, false)) {
  		nv_ioctl(parent, "create disp core channel dma vers %d "
  				 "pushbuf %08x\n",
  			 args->v0.version, args->v0.pushbuf);
  	} else
  		return ret;
  
  	ret = nv50_disp_dmac_create_(parent, engine, oclass, args->v0.pushbuf,
  				     0, sizeof(*mast), (void **)&mast);
  	*pobject = nv_object(mast);
  	if (ret)
  		return ret;
  
  	return 0;
  }
  
  static int
  nv50_disp_core_init(struct nouveau_object *object)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_dmac *mast = (void *)object;
  	int ret;
  
  	ret = nv50_disp_chan_init(&mast->base);
  	if (ret)
  		return ret;
  
  	/* enable error reporting */
  	nv_mask(priv, 0x610028, 0x00010000, 0x00010000);
  
  	/* attempt to unstick channel from some unknown state */
  	if ((nv_rd32(priv, 0x610200) & 0x009f0000) == 0x00020000)
  		nv_mask(priv, 0x610200, 0x00800000, 0x00800000);
  	if ((nv_rd32(priv, 0x610200) & 0x003f0000) == 0x00030000)
  		nv_mask(priv, 0x610200, 0x00600000, 0x00600000);
  
  	/* initialise channel for dma command submission */
  	nv_wr32(priv, 0x610204, mast->push);
  	nv_wr32(priv, 0x610208, 0x00010000);
  	nv_wr32(priv, 0x61020c, 0x00000000);
  	nv_mask(priv, 0x610200, 0x00000010, 0x00000010);
  	nv_wr32(priv, 0x640000, 0x00000000);
  	nv_wr32(priv, 0x610200, 0x01000013);
  
  	/* wait for it to go inactive */
  	if (!nv_wait(priv, 0x610200, 0x80000000, 0x00000000)) {
  		nv_error(mast, "init: 0x%08x\n", nv_rd32(priv, 0x610200));
  		return -EBUSY;
  	}
  
  	return 0;
  }
  
  static int
  nv50_disp_core_fini(struct nouveau_object *object, bool suspend)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_dmac *mast = (void *)object;
  
  	/* deactivate channel */
  	nv_mask(priv, 0x610200, 0x00000010, 0x00000000);
  	nv_mask(priv, 0x610200, 0x00000003, 0x00000000);
  	if (!nv_wait(priv, 0x610200, 0x001e0000, 0x00000000)) {
  		nv_error(mast, "fini: 0x%08x\n", nv_rd32(priv, 0x610200));
  		if (suspend)
  			return -EBUSY;
  	}
  
  	/* disable error reporting and completion notifications */
  	nv_mask(priv, 0x610028, 0x00010001, 0x00000000);
  
  	return nv50_disp_chan_fini(&mast->base, suspend);
  }
  
  struct nv50_disp_chan_impl
  nv50_disp_core_ofuncs = {
  	.base.ctor = nv50_disp_core_ctor,
  	.base.dtor = nv50_disp_dmac_dtor,
  	.base.init = nv50_disp_core_init,
  	.base.fini = nv50_disp_core_fini,
  	.base.map  = nv50_disp_chan_map,
  	.base.ntfy = nv50_disp_chan_ntfy,
  	.base.rd32 = nv50_disp_chan_rd32,
  	.base.wr32 = nv50_disp_chan_wr32,
  	.chid = 0,
  	.attach = nv50_disp_dmac_object_attach,
  	.detach = nv50_disp_dmac_object_detach,
  };
  
  /*******************************************************************************
   * EVO sync channel objects
   ******************************************************************************/
  
  static const struct nv50_disp_mthd_list
  nv50_disp_base_mthd_base = {
  	.mthd = 0x0000,
  	.addr = 0x000000,
  	.data = {
  		{ 0x0080, 0x000000 },
  		{ 0x0084, 0x0008c4 },
  		{ 0x0088, 0x0008d0 },
  		{ 0x008c, 0x0008dc },
  		{ 0x0090, 0x0008e4 },
  		{ 0x0094, 0x610884 },
  		{ 0x00a0, 0x6108a0 },
  		{ 0x00a4, 0x610878 },
  		{ 0x00c0, 0x61086c },
  		{ 0x00e0, 0x610858 },
  		{ 0x00e4, 0x610860 },
  		{ 0x00e8, 0x6108ac },
  		{ 0x00ec, 0x6108b4 },
  		{ 0x0100, 0x610894 },
  		{ 0x0110, 0x6108bc },
  		{ 0x0114, 0x61088c },
  		{}
  	}
  };
  
  const struct nv50_disp_mthd_list
  nv50_disp_base_mthd_image = {
  	.mthd = 0x0400,
  	.addr = 0x000000,
  	.data = {
  		{ 0x0800, 0x6108f0 },
  		{ 0x0804, 0x6108fc },
  		{ 0x0808, 0x61090c },
  		{ 0x080c, 0x610914 },
  		{ 0x0810, 0x610904 },
  		{}
  	}
  };
  
  static const struct nv50_disp_mthd_chan
  nv50_disp_base_mthd_chan = {
  	.name = "Base",
  	.addr = 0x000540,
  	.data = {
  		{ "Global", 1, &nv50_disp_base_mthd_base },
  		{  "Image", 2, &nv50_disp_base_mthd_image },
  		{}
  	}
  };
  
  int
  nv50_disp_base_ctor(struct nouveau_object *parent,
  		    struct nouveau_object *engine,
  		    struct nouveau_oclass *oclass, void *data, u32 size,
  		    struct nouveau_object **pobject)
  {
  	union {
  		struct nv50_disp_base_channel_dma_v0 v0;
  	} *args = data;
  	struct nv50_disp_priv *priv = (void *)engine;
  	struct nv50_disp_dmac *dmac;
  	int ret;
  
  	nv_ioctl(parent, "create disp base channel dma size %d\n", size);
  	if (nvif_unpack(args->v0, 0, 0, false)) {
  		nv_ioctl(parent, "create disp base channel dma vers %d "
  				 "pushbuf %08x head %d\n",
  			 args->v0.version, args->v0.pushbuf, args->v0.head);
  		if (args->v0.head > priv->head.nr)
  			return -EINVAL;
  	} else
  		return ret;
  
  	ret = nv50_disp_dmac_create_(parent, engine, oclass, args->v0.pushbuf,
  				     args->v0.head, sizeof(*dmac),
  				     (void **)&dmac);
  	*pobject = nv_object(dmac);
  	if (ret)
  		return ret;
  
  	return 0;
  }
  
  struct nv50_disp_chan_impl
  nv50_disp_base_ofuncs = {
  	.base.ctor = nv50_disp_base_ctor,
  	.base.dtor = nv50_disp_dmac_dtor,
  	.base.init = nv50_disp_dmac_init,
  	.base.fini = nv50_disp_dmac_fini,
  	.base.ntfy = nv50_disp_chan_ntfy,
  	.base.map  = nv50_disp_chan_map,
  	.base.rd32 = nv50_disp_chan_rd32,
  	.base.wr32 = nv50_disp_chan_wr32,
  	.chid = 1,
  	.attach = nv50_disp_dmac_object_attach,
  	.detach = nv50_disp_dmac_object_detach,
  };
  
  /*******************************************************************************
   * EVO overlay channel objects
   ******************************************************************************/
  
  const struct nv50_disp_mthd_list
  nv50_disp_ovly_mthd_base = {
  	.mthd = 0x0000,
  	.addr = 0x000000,
  	.data = {
  		{ 0x0080, 0x000000 },
  		{ 0x0084, 0x0009a0 },
  		{ 0x0088, 0x0009c0 },
  		{ 0x008c, 0x0009c8 },
  		{ 0x0090, 0x6109b4 },
  		{ 0x0094, 0x610970 },
  		{ 0x00a0, 0x610998 },
  		{ 0x00a4, 0x610964 },
  		{ 0x00c0, 0x610958 },
  		{ 0x00e0, 0x6109a8 },
  		{ 0x00e4, 0x6109d0 },
  		{ 0x00e8, 0x6109d8 },
  		{ 0x0100, 0x61094c },
  		{ 0x0104, 0x610984 },
  		{ 0x0108, 0x61098c },
  		{ 0x0800, 0x6109f8 },
  		{ 0x0808, 0x610a08 },
  		{ 0x080c, 0x610a10 },
  		{ 0x0810, 0x610a00 },
  		{}
  	}
  };
  
  static const struct nv50_disp_mthd_chan
  nv50_disp_ovly_mthd_chan = {
  	.name = "Overlay",
  	.addr = 0x000540,
  	.data = {
  		{ "Global", 1, &nv50_disp_ovly_mthd_base },
  		{}
  	}
  };
  
  int
  nv50_disp_ovly_ctor(struct nouveau_object *parent,
  		    struct nouveau_object *engine,
  		    struct nouveau_oclass *oclass, void *data, u32 size,
  		    struct nouveau_object **pobject)
  {
  	union {
  		struct nv50_disp_overlay_channel_dma_v0 v0;
  	} *args = data;
  	struct nv50_disp_priv *priv = (void *)engine;
  	struct nv50_disp_dmac *dmac;
  	int ret;
  
  	nv_ioctl(parent, "create disp overlay channel dma size %d\n", size);
  	if (nvif_unpack(args->v0, 0, 0, false)) {
  		nv_ioctl(parent, "create disp overlay channel dma vers %d "
  				 "pushbuf %08x head %d\n",
  			 args->v0.version, args->v0.pushbuf, args->v0.head);
  		if (args->v0.head > priv->head.nr)
  			return -EINVAL;
  	} else
  		return ret;
  
  	ret = nv50_disp_dmac_create_(parent, engine, oclass, args->v0.pushbuf,
  				     args->v0.head, sizeof(*dmac),
  				     (void **)&dmac);
  	*pobject = nv_object(dmac);
  	if (ret)
  		return ret;
  
  	return 0;
  }
  
  struct nv50_disp_chan_impl
  nv50_disp_ovly_ofuncs = {
  	.base.ctor = nv50_disp_ovly_ctor,
  	.base.dtor = nv50_disp_dmac_dtor,
  	.base.init = nv50_disp_dmac_init,
  	.base.fini = nv50_disp_dmac_fini,
  	.base.ntfy = nv50_disp_chan_ntfy,
  	.base.map  = nv50_disp_chan_map,
  	.base.rd32 = nv50_disp_chan_rd32,
  	.base.wr32 = nv50_disp_chan_wr32,
  	.chid = 3,
  	.attach = nv50_disp_dmac_object_attach,
  	.detach = nv50_disp_dmac_object_detach,
  };
  
  /*******************************************************************************
   * EVO PIO channel base class
   ******************************************************************************/
  
  static int
  nv50_disp_pioc_create_(struct nouveau_object *parent,
  		       struct nouveau_object *engine,
  		       struct nouveau_oclass *oclass, int head,
  		       int length, void **pobject)
  {
  	return nv50_disp_chan_create_(parent, engine, oclass, head,
  				      length, pobject);
  }
  
  void
  nv50_disp_pioc_dtor(struct nouveau_object *object)
  {
  	struct nv50_disp_pioc *pioc = (void *)object;
  	nv50_disp_chan_destroy(&pioc->base);
  }
  
  static int
  nv50_disp_pioc_init(struct nouveau_object *object)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_pioc *pioc = (void *)object;
  	int chid = pioc->base.chid;
  	int ret;
  
  	ret = nv50_disp_chan_init(&pioc->base);
  	if (ret)
  		return ret;
  
  	nv_wr32(priv, 0x610200 + (chid * 0x10), 0x00002000);
  	if (!nv_wait(priv, 0x610200 + (chid * 0x10), 0x00000000, 0x00000000)) {
  		nv_error(pioc, "timeout0: 0x%08x\n",
  			 nv_rd32(priv, 0x610200 + (chid * 0x10)));
  		return -EBUSY;
  	}
  
  	nv_wr32(priv, 0x610200 + (chid * 0x10), 0x00000001);
  	if (!nv_wait(priv, 0x610200 + (chid * 0x10), 0x00030000, 0x00010000)) {
  		nv_error(pioc, "timeout1: 0x%08x\n",
  			 nv_rd32(priv, 0x610200 + (chid * 0x10)));
  		return -EBUSY;
  	}
  
  	return 0;
  }
  
  static int
  nv50_disp_pioc_fini(struct nouveau_object *object, bool suspend)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_pioc *pioc = (void *)object;
  	int chid = pioc->base.chid;
  
  	nv_mask(priv, 0x610200 + (chid * 0x10), 0x00000001, 0x00000000);
  	if (!nv_wait(priv, 0x610200 + (chid * 0x10), 0x00030000, 0x00000000)) {
  		nv_error(pioc, "timeout: 0x%08x\n",
  			 nv_rd32(priv, 0x610200 + (chid * 0x10)));
  		if (suspend)
  			return -EBUSY;
  	}
  
  	return nv50_disp_chan_fini(&pioc->base, suspend);
  }
  
  /*******************************************************************************
   * EVO immediate overlay channel objects
   ******************************************************************************/
  
  int
  nv50_disp_oimm_ctor(struct nouveau_object *parent,
  		    struct nouveau_object *engine,
  		    struct nouveau_oclass *oclass, void *data, u32 size,
  		    struct nouveau_object **pobject)
  {
  	union {
  		struct nv50_disp_overlay_v0 v0;
  	} *args = data;
  	struct nv50_disp_priv *priv = (void *)engine;
  	struct nv50_disp_pioc *pioc;
  	int ret;
  
  	nv_ioctl(parent, "create disp overlay size %d\n", size);
  	if (nvif_unpack(args->v0, 0, 0, false)) {
  		nv_ioctl(parent, "create disp overlay vers %d head %d\n",
  			 args->v0.version, args->v0.head);
  		if (args->v0.head > priv->head.nr)
  			return -EINVAL;
  	} else
  		return ret;
  
  	ret = nv50_disp_pioc_create_(parent, engine, oclass, args->v0.head,
  				     sizeof(*pioc), (void **)&pioc);
  	*pobject = nv_object(pioc);
  	if (ret)
  		return ret;
  
  	return 0;
  }
  
  struct nv50_disp_chan_impl
  nv50_disp_oimm_ofuncs = {
  	.base.ctor = nv50_disp_oimm_ctor,
  	.base.dtor = nv50_disp_pioc_dtor,
  	.base.init = nv50_disp_pioc_init,
  	.base.fini = nv50_disp_pioc_fini,
  	.base.ntfy = nv50_disp_chan_ntfy,
  	.base.map  = nv50_disp_chan_map,
  	.base.rd32 = nv50_disp_chan_rd32,
  	.base.wr32 = nv50_disp_chan_wr32,
  	.chid = 5,
  };
  
  /*******************************************************************************
   * EVO cursor channel objects
   ******************************************************************************/
  
  int
  nv50_disp_curs_ctor(struct nouveau_object *parent,
  		    struct nouveau_object *engine,
  		    struct nouveau_oclass *oclass, void *data, u32 size,
  		    struct nouveau_object **pobject)
  {
  	union {
  		struct nv50_disp_cursor_v0 v0;
  	} *args = data;
  	struct nv50_disp_priv *priv = (void *)engine;
  	struct nv50_disp_pioc *pioc;
  	int ret;
  
  	nv_ioctl(parent, "create disp cursor size %d\n", size);
  	if (nvif_unpack(args->v0, 0, 0, false)) {
  		nv_ioctl(parent, "create disp cursor vers %d head %d\n",
  			 args->v0.version, args->v0.head);
  		if (args->v0.head > priv->head.nr)
  			return -EINVAL;
  	} else
  		return ret;
  
  	ret = nv50_disp_pioc_create_(parent, engine, oclass, args->v0.head,
  				     sizeof(*pioc), (void **)&pioc);
  	*pobject = nv_object(pioc);
  	if (ret)
  		return ret;
  
  	return 0;
  }
  
  struct nv50_disp_chan_impl
  nv50_disp_curs_ofuncs = {
  	.base.ctor = nv50_disp_curs_ctor,
  	.base.dtor = nv50_disp_pioc_dtor,
  	.base.init = nv50_disp_pioc_init,
  	.base.fini = nv50_disp_pioc_fini,
  	.base.ntfy = nv50_disp_chan_ntfy,
  	.base.map  = nv50_disp_chan_map,
  	.base.rd32 = nv50_disp_chan_rd32,
  	.base.wr32 = nv50_disp_chan_wr32,
  	.chid = 7,
  };
  
  /*******************************************************************************
   * Base display object
   ******************************************************************************/
  
  int
  nv50_disp_main_scanoutpos(NV50_DISP_MTHD_V0)
  {
  	const u32 blanke = nv_rd32(priv, 0x610aec + (head * 0x540));
  	const u32 blanks = nv_rd32(priv, 0x610af4 + (head * 0x540));
  	const u32 total  = nv_rd32(priv, 0x610afc + (head * 0x540));
  	union {
  		struct nv04_disp_scanoutpos_v0 v0;
  	} *args = data;
  	int ret;
  
  	nv_ioctl(object, "disp scanoutpos size %d\n", size);
  	if (nvif_unpack(args->v0, 0, 0, false)) {
  		nv_ioctl(object, "disp scanoutpos vers %d\n", args->v0.version);
  		args->v0.vblanke = (blanke & 0xffff0000) >> 16;
  		args->v0.hblanke = (blanke & 0x0000ffff);
  		args->v0.vblanks = (blanks & 0xffff0000) >> 16;
  		args->v0.hblanks = (blanks & 0x0000ffff);
  		args->v0.vtotal  = ( total & 0xffff0000) >> 16;
  		args->v0.htotal  = ( total & 0x0000ffff);
  		args->v0.time[0] = ktime_to_ns(ktime_get());
  		args->v0.vline = /* vline read locks hline */
  			nv_rd32(priv, 0x616340 + (head * 0x800)) & 0xffff;
  		args->v0.time[1] = ktime_to_ns(ktime_get());
  		args->v0.hline =
  			nv_rd32(priv, 0x616344 + (head * 0x800)) & 0xffff;
  	} else
  		return ret;
  
  	return 0;
  }
  
  int
  nv50_disp_main_mthd(struct nouveau_object *object, u32 mthd,
  		    void *data, u32 size)
  {
  	const struct nv50_disp_impl *impl = (void *)nv_oclass(object->engine);
  	union {
  		struct nv50_disp_mthd_v0 v0;
  		struct nv50_disp_mthd_v1 v1;
  	} *args = data;
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nvkm_output *outp = NULL;
  	struct nvkm_output *temp;
  	u16 type, mask = 0;
  	int head, ret;
  
  	if (mthd != NV50_DISP_MTHD)
  		return -EINVAL;
  
  	nv_ioctl(object, "disp mthd size %d\n", size);
  	if (nvif_unpack(args->v0, 0, 0, true)) {
  		nv_ioctl(object, "disp mthd vers %d mthd %02x head %d\n",
  			 args->v0.version, args->v0.method, args->v0.head);
  		mthd = args->v0.method;
  		head = args->v0.head;
  	} else
  	if (nvif_unpack(args->v1, 1, 1, true)) {
  		nv_ioctl(object, "disp mthd vers %d mthd %02x "
  				 "type %04x mask %04x\n",
  			 args->v1.version, args->v1.method,
  			 args->v1.hasht, args->v1.hashm);
  		mthd = args->v1.method;
  		type = args->v1.hasht;
  		mask = args->v1.hashm;
  		head = ffs((mask >> 8) & 0x0f) - 1;
  	} else
  		return ret;
  
  	if (head < 0 || head >= priv->head.nr)
  		return -ENXIO;
  
  	if (mask) {
  		list_for_each_entry(temp, &priv->base.outp, head) {
  			if ((temp->info.hasht         == type) &&
  			    (temp->info.hashm & mask) == mask) {
  				outp = temp;
  				break;
  			}
  		}
  		if (outp == NULL)
  			return -ENXIO;
  	}
  
  	switch (mthd) {
  	case NV50_DISP_SCANOUTPOS:
  		return impl->head.scanoutpos(object, priv, data, size, head);
  	default:
  		break;
  	}
  
  	switch (mthd * !!outp) {
  	case NV50_DISP_MTHD_V1_DAC_PWR:
  		return priv->dac.power(object, priv, data, size, head, outp);
  	case NV50_DISP_MTHD_V1_DAC_LOAD:
  		return priv->dac.sense(object, priv, data, size, head, outp);
  	case NV50_DISP_MTHD_V1_SOR_PWR:
  		return priv->sor.power(object, priv, data, size, head, outp);
  	case NV50_DISP_MTHD_V1_SOR_HDA_ELD:
  		if (!priv->sor.hda_eld)
  			return -ENODEV;
  		return priv->sor.hda_eld(object, priv, data, size, head, outp);
  	case NV50_DISP_MTHD_V1_SOR_HDMI_PWR:
  		if (!priv->sor.hdmi)
  			return -ENODEV;
  		return priv->sor.hdmi(object, priv, data, size, head, outp);
  	case NV50_DISP_MTHD_V1_SOR_LVDS_SCRIPT: {
  		union {
  			struct nv50_disp_sor_lvds_script_v0 v0;
  		} *args = data;
  		nv_ioctl(object, "disp sor lvds script size %d\n", size);
  		if (nvif_unpack(args->v0, 0, 0, false)) {
  			nv_ioctl(object, "disp sor lvds script "
  					 "vers %d name %04x\n",
  				 args->v0.version, args->v0.script);
  			priv->sor.lvdsconf = args->v0.script;
  			return 0;
  		} else
  			return ret;
  	}
  		break;
  	case NV50_DISP_MTHD_V1_SOR_DP_PWR: {
  		struct nvkm_output_dp *outpdp = (void *)outp;
  		union {
  			struct nv50_disp_sor_dp_pwr_v0 v0;
  		} *args = data;
  		nv_ioctl(object, "disp sor dp pwr size %d\n", size);
  		if (nvif_unpack(args->v0, 0, 0, false)) {
  			nv_ioctl(object, "disp sor dp pwr vers %d state %d\n",
  				 args->v0.version, args->v0.state);
  			if (args->v0.state == 0) {
  				nvkm_notify_put(&outpdp->irq);
  				((struct nvkm_output_dp_impl *)nv_oclass(outp))
  					->lnk_pwr(outpdp, 0);
  				atomic_set(&outpdp->lt.done, 0);
  				return 0;
  			} else
  			if (args->v0.state != 0) {
  				nvkm_output_dp_train(&outpdp->base, 0, true);
  				return 0;
  			}
  		} else
  			return ret;
  	}
  		break;
  	case NV50_DISP_MTHD_V1_PIOR_PWR:
  		if (!priv->pior.power)
  			return -ENODEV;
  		return priv->pior.power(object, priv, data, size, head, outp);
  	default:
  		break;
  	}
  
  	return -EINVAL;
  }
  
  int
  nv50_disp_main_ctor(struct nouveau_object *parent,
  		    struct nouveau_object *engine,
  		    struct nouveau_oclass *oclass, void *data, u32 size,
  		    struct nouveau_object **pobject)
  {
  	struct nv50_disp_priv *priv = (void *)engine;
  	struct nv50_disp_base *base;
  	int ret;
  
  	ret = nouveau_parent_create(parent, engine, oclass, 0,
  				    priv->sclass, 0, &base);
  	*pobject = nv_object(base);
  	if (ret)
  		return ret;
  
  	return nouveau_ramht_new(nv_object(base), nv_object(base), 0x1000, 0,
  				&base->ramht);
  }
  
  void
  nv50_disp_main_dtor(struct nouveau_object *object)
  {
  	struct nv50_disp_base *base = (void *)object;
  	nouveau_ramht_ref(NULL, &base->ramht);
  	nouveau_parent_destroy(&base->base);
  }
  
  static int
  nv50_disp_main_init(struct nouveau_object *object)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_base *base = (void *)object;
  	int ret, i;
  	u32 tmp;
  
  	ret = nouveau_parent_init(&base->base);
  	if (ret)
  		return ret;
  
  	/* The below segments of code copying values from one register to
  	 * another appear to inform EVO of the display capabilities or
  	 * something similar.  NFI what the 0x614004 caps are for..
  	 */
  	tmp = nv_rd32(priv, 0x614004);
  	nv_wr32(priv, 0x610184, tmp);
  
  	/* ... CRTC caps */
  	for (i = 0; i < priv->head.nr; i++) {
  		tmp = nv_rd32(priv, 0x616100 + (i * 0x800));
  		nv_wr32(priv, 0x610190 + (i * 0x10), tmp);
  		tmp = nv_rd32(priv, 0x616104 + (i * 0x800));
  		nv_wr32(priv, 0x610194 + (i * 0x10), tmp);
  		tmp = nv_rd32(priv, 0x616108 + (i * 0x800));
  		nv_wr32(priv, 0x610198 + (i * 0x10), tmp);
  		tmp = nv_rd32(priv, 0x61610c + (i * 0x800));
  		nv_wr32(priv, 0x61019c + (i * 0x10), tmp);
  	}
  
  	/* ... DAC caps */
  	for (i = 0; i < priv->dac.nr; i++) {
  		tmp = nv_rd32(priv, 0x61a000 + (i * 0x800));
  		nv_wr32(priv, 0x6101d0 + (i * 0x04), tmp);
  	}
  
  	/* ... SOR caps */
  	for (i = 0; i < priv->sor.nr; i++) {
  		tmp = nv_rd32(priv, 0x61c000 + (i * 0x800));
  		nv_wr32(priv, 0x6101e0 + (i * 0x04), tmp);
  	}
  
  	/* ... PIOR caps */
  	for (i = 0; i < priv->pior.nr; i++) {
  		tmp = nv_rd32(priv, 0x61e000 + (i * 0x800));
  		nv_wr32(priv, 0x6101f0 + (i * 0x04), tmp);
  	}
  
  	/* steal display away from vbios, or something like that */
  	if (nv_rd32(priv, 0x610024) & 0x00000100) {
  		nv_wr32(priv, 0x610024, 0x00000100);
  		nv_mask(priv, 0x6194e8, 0x00000001, 0x00000000);
  		if (!nv_wait(priv, 0x6194e8, 0x00000002, 0x00000000)) {
  			nv_error(priv, "timeout acquiring display\n");
  			return -EBUSY;
  		}
  	}
  
  	/* point at display engine memory area (hash table, objects) */
  	nv_wr32(priv, 0x610010, (nv_gpuobj(base->ramht)->addr >> 8) | 9);
  
  	/* enable supervisor interrupts, disable everything else */
  	nv_wr32(priv, 0x61002c, 0x00000370);
  	nv_wr32(priv, 0x610028, 0x00000000);
  	return 0;
  }
  
  static int
  nv50_disp_main_fini(struct nouveau_object *object, bool suspend)
  {
  	struct nv50_disp_priv *priv = (void *)object->engine;
  	struct nv50_disp_base *base = (void *)object;
  
  	/* disable all interrupts */
  	nv_wr32(priv, 0x610024, 0x00000000);
  	nv_wr32(priv, 0x610020, 0x00000000);
  
  	return nouveau_parent_fini(&base->base, suspend);
  }
  
  struct nouveau_ofuncs
  nv50_disp_main_ofuncs = {
  	.ctor = nv50_disp_main_ctor,
  	.dtor = nv50_disp_main_dtor,
  	.init = nv50_disp_main_init,
  	.fini = nv50_disp_main_fini,
  	.mthd = nv50_disp_main_mthd,
  	.ntfy = nouveau_disp_ntfy,
  };
  
  static struct nouveau_oclass
  nv50_disp_main_oclass[] = {
  	{ NV50_DISP, &nv50_disp_main_ofuncs },
  	{}
  };
  
  static struct nouveau_oclass
  nv50_disp_sclass[] = {
  	{ NV50_DISP_CORE_CHANNEL_DMA, &nv50_disp_core_ofuncs.base },
  	{ NV50_DISP_BASE_CHANNEL_DMA, &nv50_disp_base_ofuncs.base },
  	{ NV50_DISP_OVERLAY_CHANNEL_DMA, &nv50_disp_ovly_ofuncs.base },
  	{ NV50_DISP_OVERLAY, &nv50_disp_oimm_ofuncs.base },
  	{ NV50_DISP_CURSOR, &nv50_disp_curs_ofuncs.base },
  	{}
  };
  
  /*******************************************************************************
   * Display context, tracks instmem allocation and prevents more than one
   * client using the display hardware at any time.
   ******************************************************************************/
  
  static int
  nv50_disp_data_ctor(struct nouveau_object *parent,
  		    struct nouveau_object *engine,
  		    struct nouveau_oclass *oclass, void *data, u32 size,
  		    struct nouveau_object **pobject)
  {
  	struct nv50_disp_priv *priv = (void *)engine;
  	struct nouveau_engctx *ectx;
  	int ret = -EBUSY;
  
  	/* no context needed for channel objects... */
  	if (nv_mclass(parent) != NV_DEVICE) {
  		atomic_inc(&parent->refcount);
  		*pobject = parent;
  		return 1;
  	}
  
  	/* allocate display hardware to client */
  	mutex_lock(&nv_subdev(priv)->mutex);
  	if (list_empty(&nv_engine(priv)->contexts)) {
  		ret = nouveau_engctx_create(parent, engine, oclass, NULL,
  					    0x10000, 0x10000,
  					    NVOBJ_FLAG_HEAP, &ectx);
  		*pobject = nv_object(ectx);
  	}
  	mutex_unlock(&nv_subdev(priv)->mutex);
  	return ret;
  }
  
  struct nouveau_oclass
  nv50_disp_cclass = {
  	.handle = NV_ENGCTX(DISP, 0x50),
  	.ofuncs = &(struct nouveau_ofuncs) {
  		.ctor = nv50_disp_data_ctor,
  		.dtor = _nouveau_engctx_dtor,
  		.init = _nouveau_engctx_init,
  		.fini = _nouveau_engctx_fini,
  		.rd32 = _nouveau_engctx_rd32,
  		.wr32 = _nouveau_engctx_wr32,
  	},
  };
  
  /*******************************************************************************
   * Display engine implementation
   ******************************************************************************/
  
  static void
  nv50_disp_vblank_fini(struct nvkm_event *event, int type, int head)
  {
  	struct nouveau_disp *disp = container_of(event, typeof(*disp), vblank);
  	nv_mask(disp, 0x61002c, (4 << head), 0);
  }
  
  static void
  nv50_disp_vblank_init(struct nvkm_event *event, int type, int head)
  {
  	struct nouveau_disp *disp = container_of(event, typeof(*disp), vblank);
  	nv_mask(disp, 0x61002c, (4 << head), (4 << head));
  }
  
  const struct nvkm_event_func
  nv50_disp_vblank_func = {
  	.ctor = nouveau_disp_vblank_ctor,
  	.init = nv50_disp_vblank_init,
  	.fini = nv50_disp_vblank_fini,
  };
  
  static const struct nouveau_enum
  nv50_disp_intr_error_type[] = {
  	{ 3, "ILLEGAL_MTHD" },
  	{ 4, "INVALID_VALUE" },
  	{ 5, "INVALID_STATE" },
  	{ 7, "INVALID_HANDLE" },
  	{}
  };
  
  static const struct nouveau_enum
  nv50_disp_intr_error_code[] = {
  	{ 0x00, "" },
  	{}
  };
  
  static void
  nv50_disp_intr_error(struct nv50_disp_priv *priv, int chid)
  {
  	struct nv50_disp_impl *impl = (void *)nv_object(priv)->oclass;
  	u32 data = nv_rd32(priv, 0x610084 + (chid * 0x08));
  	u32 addr = nv_rd32(priv, 0x610080 + (chid * 0x08));
  	u32 code = (addr & 0x00ff0000) >> 16;
  	u32 type = (addr & 0x00007000) >> 12;
  	u32 mthd = (addr & 0x00000ffc);
  	const struct nouveau_enum *ec, *et;
  	char ecunk[6], etunk[6];
  
  	et = nouveau_enum_find(nv50_disp_intr_error_type, type);
  	if (!et)
  		snprintf(etunk, sizeof(etunk), "UNK%02X", type);
  
  	ec = nouveau_enum_find(nv50_disp_intr_error_code, code);
  	if (!ec)
  		snprintf(ecunk, sizeof(ecunk), "UNK%02X", code);
  
  	nv_error(priv, "%s [%s] chid %d mthd 0x%04x data 0x%08x\n",
  		 et ? et->name : etunk, ec ? ec->name : ecunk,
  		 chid, mthd, data);
  
  	if (chid == 0) {
  		switch (mthd) {
  		case 0x0080:
  			nv50_disp_mthd_chan(priv, NV_DBG_ERROR, chid - 0,
  					    impl->mthd.core);
  			break;
  		default:
  			break;
  		}
  	} else
  	if (chid <= 2) {
  		switch (mthd) {
  		case 0x0080:
  			nv50_disp_mthd_chan(priv, NV_DBG_ERROR, chid - 1,
  					    impl->mthd.base);
  			break;
  		default:
  			break;
  		}
  	} else
  	if (chid <= 4) {
  		switch (mthd) {
  		case 0x0080:
  			nv50_disp_mthd_chan(priv, NV_DBG_ERROR, chid - 3,
  					    impl->mthd.ovly);
  			break;
  		default:
  			break;
  		}
  	}
  
  	nv_wr32(priv, 0x610020, 0x00010000 << chid);
  	nv_wr32(priv, 0x610080 + (chid * 0x08), 0x90000000);
  }
  
  static struct nvkm_output *
  exec_lookup(struct nv50_disp_priv *priv, int head, int or, u32 ctrl,
  	    u32 *data, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
  	    struct nvbios_outp *info)
  {
  	struct nouveau_bios *bios = nouveau_bios(priv);
  	struct nvkm_output *outp;
  	u16 mask, type;
  
  	if (or < 4) {
  		type = DCB_OUTPUT_ANALOG;
  		mask = 0;
  	} else
  	if (or < 8) {
  		switch (ctrl & 0x00000f00) {
  		case 0x00000000: type = DCB_OUTPUT_LVDS; mask = 1; break;
  		case 0x00000100: type = DCB_OUTPUT_TMDS; mask = 1; break;
  		case 0x00000200: type = DCB_OUTPUT_TMDS; mask = 2; break;
  		case 0x00000500: type = DCB_OUTPUT_TMDS; mask = 3; break;
  		case 0x00000800: type = DCB_OUTPUT_DP; mask = 1; break;
  		case 0x00000900: type = DCB_OUTPUT_DP; mask = 2; break;
  		default:
  			nv_error(priv, "unknown SOR mc 0x%08x\n", ctrl);
  			return NULL;
  		}
  		or  -= 4;
  	} else {
  		or   = or - 8;
  		type = 0x0010;
  		mask = 0;
  		switch (ctrl & 0x00000f00) {
  		case 0x00000000: type |= priv->pior.type[or]; break;
  		default:
  			nv_error(priv, "unknown PIOR mc 0x%08x\n", ctrl);
  			return NULL;
  		}
  	}
  
  	mask  = 0x00c0 & (mask << 6);
  	mask |= 0x0001 << or;
  	mask |= 0x0100 << head;
  
  	list_for_each_entry(outp, &priv->base.outp, head) {
  		if ((outp->info.hasht & 0xff) == type &&
  		    (outp->info.hashm & mask) == mask) {
  			*data = nvbios_outp_match(bios, outp->info.hasht,
  							outp->info.hashm,
  						  ver, hdr, cnt, len, info);
  			if (!*data)
  				return NULL;
  			return outp;
  		}
  	}
  
  	return NULL;
  }
  
  static struct nvkm_output *
  exec_script(struct nv50_disp_priv *priv, int head, int id)
  {
  	struct nouveau_bios *bios = nouveau_bios(priv);
  	struct nvkm_output *outp;
  	struct nvbios_outp info;
  	u8  ver, hdr, cnt, len;
  	u32 data, ctrl = 0;
  	u32 reg;
  	int i;
  
  	/* DAC */
  	for (i = 0; !(ctrl & (1 << head)) && i < priv->dac.nr; i++)
  		ctrl = nv_rd32(priv, 0x610b5c + (i * 8));
  
  	/* SOR */
  	if (!(ctrl & (1 << head))) {
  		if (nv_device(priv)->chipset  < 0x90 ||
  		    nv_device(priv)->chipset == 0x92 ||
  		    nv_device(priv)->chipset == 0xa0) {
  			reg = 0x610b74;
  		} else {
  			reg = 0x610798;
  		}
  		for (i = 0; !(ctrl & (1 << head)) && i < priv->sor.nr; i++)
  			ctrl = nv_rd32(priv, reg + (i * 8));
  		i += 4;
  	}
  
  	/* PIOR */
  	if (!(ctrl & (1 << head))) {
  		for (i = 0; !(ctrl & (1 << head)) && i < priv->pior.nr; i++)
  			ctrl = nv_rd32(priv, 0x610b84 + (i * 8));
  		i += 8;
  	}
  
  	if (!(ctrl & (1 << head)))
  		return NULL;
  	i--;
  
  	outp = exec_lookup(priv, head, i, ctrl, &data, &ver, &hdr, &cnt, &len, &info);
  	if (outp) {
  		struct nvbios_init init = {
  			.subdev = nv_subdev(priv),
  			.bios = bios,
  			.offset = info.script[id],
  			.outp = &outp->info,
  			.crtc = head,
  			.execute = 1,
  		};
  
  		nvbios_exec(&init);
  	}
  
  	return outp;
  }
  
  static struct nvkm_output *
  exec_clkcmp(struct nv50_disp_priv *priv, int head, int id, u32 pclk, u32 *conf)
  {
  	struct nouveau_bios *bios = nouveau_bios(priv);
  	struct nvkm_output *outp;
  	struct nvbios_outp info1;
  	struct nvbios_ocfg info2;
  	u8  ver, hdr, cnt, len;
  	u32 data, ctrl = 0;
  	u32 reg;
  	int i;
  
  	/* DAC */
  	for (i = 0; !(ctrl & (1 << head)) && i < priv->dac.nr; i++)
  		ctrl = nv_rd32(priv, 0x610b58 + (i * 8));
  
  	/* SOR */
  	if (!(ctrl & (1 << head))) {
  		if (nv_device(priv)->chipset  < 0x90 ||
  		    nv_device(priv)->chipset == 0x92 ||
  		    nv_device(priv)->chipset == 0xa0) {
  			reg = 0x610b70;
  		} else {
  			reg = 0x610794;
  		}
  		for (i = 0; !(ctrl & (1 << head)) && i < priv->sor.nr; i++)
  			ctrl = nv_rd32(priv, reg + (i * 8));
  		i += 4;
  	}
  
  	/* PIOR */
  	if (!(ctrl & (1 << head))) {
  		for (i = 0; !(ctrl & (1 << head)) && i < priv->pior.nr; i++)
  			ctrl = nv_rd32(priv, 0x610b80 + (i * 8));
  		i += 8;
  	}
  
  	if (!(ctrl & (1 << head)))
  		return NULL;
  	i--;
  
  	outp = exec_lookup(priv, head, i, ctrl, &data, &ver, &hdr, &cnt, &len, &info1);
  	if (!outp)
  		return NULL;
  
  	if (outp->info.location == 0) {
  		switch (outp->info.type) {
  		case DCB_OUTPUT_TMDS:
  			*conf = (ctrl & 0x00000f00) >> 8;
  			if (pclk >= 165000)
  				*conf |= 0x0100;
  			break;
  		case DCB_OUTPUT_LVDS:
  			*conf = priv->sor.lvdsconf;
  			break;
  		case DCB_OUTPUT_DP:
  			*conf = (ctrl & 0x00000f00) >> 8;
  			break;
  		case DCB_OUTPUT_ANALOG:
  		default:
  			*conf = 0x00ff;
  			break;
  		}
  	} else {
  		*conf = (ctrl & 0x00000f00) >> 8;
  		pclk = pclk / 2;
  	}
  
  	data = nvbios_ocfg_match(bios, data, *conf, &ver, &hdr, &cnt, &len, &info2);
  	if (data && id < 0xff) {
  		data = nvbios_oclk_match(bios, info2.clkcmp[id], pclk);
  		if (data) {
  			struct nvbios_init init = {
  				.subdev = nv_subdev(priv),
  				.bios = bios,
  				.offset = data,
  				.outp = &outp->info,
  				.crtc = head,
  				.execute = 1,
  			};
  
  			nvbios_exec(&init);
  		}
  	}
  
  	return outp;
  }
  
  static void
  nv50_disp_intr_unk10_0(struct nv50_disp_priv *priv, int head)
  {
  	exec_script(priv, head, 1);
  }
  
  static void
  nv50_disp_intr_unk20_0(struct nv50_disp_priv *priv, int head)
  {
  	struct nvkm_output *outp = exec_script(priv, head, 2);
  
  	/* the binary driver does this outside of the supervisor handling
  	 * (after the third supervisor from a detach).  we (currently?)
  	 * allow both detach/attach to happen in the same set of
  	 * supervisor interrupts, so it would make sense to execute this
  	 * (full power down?) script after all the detach phases of the
  	 * supervisor handling.  like with training if needed from the
  	 * second supervisor, nvidia doesn't do this, so who knows if it's
  	 * entirely safe, but it does appear to work..
  	 *
  	 * without this script being run, on some configurations i've
  	 * seen, switching from DP to TMDS on a DP connector may result
  	 * in a blank screen (SOR_PWR off/on can restore it)
  	 */
  	if (outp && outp->info.type == DCB_OUTPUT_DP) {
  		struct nvkm_output_dp *outpdp = (void *)outp;
  		struct nvbios_init init = {
  			.subdev = nv_subdev(priv),
  			.bios = nouveau_bios(priv),
  			.outp = &outp->info,
  			.crtc = head,
  			.offset = outpdp->info.script[4],
  			.execute = 1,
  		};
  
  		nvbios_exec(&init);
  		atomic_set(&outpdp->lt.done, 0);
  	}
  }
  
  static void
  nv50_disp_intr_unk20_1(struct nv50_disp_priv *priv, int head)
  {
  	struct nouveau_devinit *devinit = nouveau_devinit(priv);
  	u32 pclk = nv_rd32(priv, 0x610ad0 + (head * 0x540)) & 0x3fffff;
  	if (pclk)
  		devinit->pll_set(devinit, PLL_VPLL0 + head, pclk);
  }
  
  static void
  nv50_disp_intr_unk20_2_dp(struct nv50_disp_priv *priv, int head,
  			  struct dcb_output *outp, u32 pclk)
  {
  	const int link = !(outp->sorconf.link & 1);
  	const int   or = ffs(outp->or) - 1;
  	const u32 soff = (  or * 0x800);
  	const u32 loff = (link * 0x080) + soff;
  	const u32 ctrl = nv_rd32(priv, 0x610794 + (or * 8));
  	const u32 symbol = 100000;
  	const s32 vactive = nv_rd32(priv, 0x610af8 + (head * 0x540)) & 0xffff;
  	const s32 vblanke = nv_rd32(priv, 0x610ae8 + (head * 0x540)) & 0xffff;
  	const s32 vblanks = nv_rd32(priv, 0x610af0 + (head * 0x540)) & 0xffff;
  	u32 dpctrl = nv_rd32(priv, 0x61c10c + loff);
  	u32 clksor = nv_rd32(priv, 0x614300 + soff);
  	int bestTU = 0, bestVTUi = 0, bestVTUf = 0, bestVTUa = 0;
  	int TU, VTUi, VTUf, VTUa;
  	u64 link_data_rate, link_ratio, unk;
  	u32 best_diff = 64 * symbol;
  	u32 link_nr, link_bw, bits;
  	u64 value;
  
  	link_bw = (clksor & 0x000c0000) ? 270000 : 162000;
  	link_nr = hweight32(dpctrl & 0x000f0000);
  
  	/* symbols/hblank - algorithm taken from comments in tegra driver */
  	value = vblanke + vactive - vblanks - 7;
  	value = value * link_bw;
  	do_div(value, pclk);
  	value = value - (3 * !!(dpctrl & 0x00004000)) - (12 / link_nr);
  	nv_mask(priv, 0x61c1e8 + soff, 0x0000ffff, value);
  
  	/* symbols/vblank - algorithm taken from comments in tegra driver */
  	value = vblanks - vblanke - 25;
  	value = value * link_bw;
  	do_div(value, pclk);
  	value = value - ((36 / link_nr) + 3) - 1;
  	nv_mask(priv, 0x61c1ec + soff, 0x00ffffff, value);
  
  	/* watermark / activesym */
  	if      ((ctrl & 0xf0000) == 0x60000) bits = 30;
  	else if ((ctrl & 0xf0000) == 0x50000) bits = 24;
  	else                                  bits = 18;
  
  	link_data_rate = (pclk * bits / 8) / link_nr;
  
  	/* calculate ratio of packed data rate to link symbol rate */
  	link_ratio = link_data_rate * symbol;
  	do_div(link_ratio, link_bw);
  
  	for (TU = 64; TU >= 32; TU--) {
  		/* calculate average number of valid symbols in each TU */
  		u32 tu_valid = link_ratio * TU;
  		u32 calc, diff;
  
  		/* find a hw representation for the fraction.. */
  		VTUi = tu_valid / symbol;
  		calc = VTUi * symbol;
  		diff = tu_valid - calc;
  		if (diff) {
  			if (diff >= (symbol / 2)) {
  				VTUf = symbol / (symbol - diff);
  				if (symbol - (VTUf * diff))
  					VTUf++;
  
  				if (VTUf <= 15) {
  					VTUa  = 1;
  					calc += symbol - (symbol / VTUf);
  				} else {
  					VTUa  = 0;
  					VTUf  = 1;
  					calc += symbol;
  				}
  			} else {
  				VTUa  = 0;
  				VTUf  = min((int)(symbol / diff), 15);
  				calc += symbol / VTUf;
  			}
  
  			diff = calc - tu_valid;
  		} else {
  			/* no remainder, but the hw doesn't like the fractional
  			 * part to be zero.  decrement the integer part and
  			 * have the fraction add a whole symbol back
  			 */
  			VTUa = 0;
  			VTUf = 1;
  			VTUi--;
  		}
  
  		if (diff < best_diff) {
  			best_diff = diff;
  			bestTU = TU;
  			bestVTUa = VTUa;
  			bestVTUf = VTUf;
  			bestVTUi = VTUi;
  			if (diff == 0)
  				break;
  		}
  	}
  
  	if (!bestTU) {
  		nv_error(priv, "unable to find suitable dp config\n");
  		return;
  	}
  
  	/* XXX close to vbios numbers, but not right */
  	unk  = (symbol - link_ratio) * bestTU;
  	unk *= link_ratio;
  	do_div(unk, symbol);
  	do_div(unk, symbol);
  	unk += 6;
  
  	nv_mask(priv, 0x61c10c + loff, 0x000001fc, bestTU << 2);
  	nv_mask(priv, 0x61c128 + loff, 0x010f7f3f, bestVTUa << 24 |
  						   bestVTUf << 16 |
  						   bestVTUi << 8 | unk);
  }
  
  static void
  nv50_disp_intr_unk20_2(struct nv50_disp_priv *priv, int head)
  {
  	struct nvkm_output *outp;
  	u32 pclk = nv_rd32(priv, 0x610ad0 + (head * 0x540)) & 0x3fffff;
  	u32 hval, hreg = 0x614200 + (head * 0x800);
  	u32 oval, oreg;
  	u32 mask, conf;
  
  	outp = exec_clkcmp(priv, head, 0xff, pclk, &conf);
  	if (!outp)
  		return;
  
  	/* we allow both encoder attach and detach operations to occur
  	 * within a single supervisor (ie. modeset) sequence.  the
  	 * encoder detach scripts quite often switch off power to the
  	 * lanes, which requires the link to be re-trained.
  	 *
  	 * this is not generally an issue as the sink "must" (heh)
  	 * signal an irq when it's lost sync so the driver can
  	 * re-train.
  	 *
  	 * however, on some boards, if one does not configure at least
  	 * the gpu side of the link *before* attaching, then various
  	 * things can go horribly wrong (PDISP disappearing from mmio,
  	 * third supervisor never happens, etc).
  	 *
  	 * the solution is simply to retrain here, if necessary.  last
  	 * i checked, the binary driver userspace does not appear to
  	 * trigger this situation (it forces an UPDATE between steps).
  	 */
  	if (outp->info.type == DCB_OUTPUT_DP) {
  		u32 soff = (ffs(outp->info.or) - 1) * 0x08;
  		u32 ctrl, datarate;
  
  		if (outp->info.location == 0) {
  			ctrl = nv_rd32(priv, 0x610794 + soff);
  			soff = 1;
  		} else {
  			ctrl = nv_rd32(priv, 0x610b80 + soff);
  			soff = 2;
  		}
  
  		switch ((ctrl & 0x000f0000) >> 16) {
  		case 6: datarate = pclk * 30; break;
  		case 5: datarate = pclk * 24; break;
  		case 2:
  		default:
  			datarate = pclk * 18;
  			break;
  		}
  
  		if (nvkm_output_dp_train(outp, datarate / soff, true))
  			ERR("link not trained before attach\n");
  	}
  
  	exec_clkcmp(priv, head, 0, pclk, &conf);
  
  	if (!outp->info.location && outp->info.type == DCB_OUTPUT_ANALOG) {
  		oreg = 0x614280 + (ffs(outp->info.or) - 1) * 0x800;
  		oval = 0x00000000;
  		hval = 0x00000000;
  		mask = 0xffffffff;
  	} else
  	if (!outp->info.location) {
  		if (outp->info.type == DCB_OUTPUT_DP)
  			nv50_disp_intr_unk20_2_dp(priv, head, &outp->info, pclk);
  		oreg = 0x614300 + (ffs(outp->info.or) - 1) * 0x800;
  		oval = (conf & 0x0100) ? 0x00000101 : 0x00000000;
  		hval = 0x00000000;
  		mask = 0x00000707;
  	} else {
  		oreg = 0x614380 + (ffs(outp->info.or) - 1) * 0x800;
  		oval = 0x00000001;
  		hval = 0x00000001;
  		mask = 0x00000707;
  	}
  
  	nv_mask(priv, hreg, 0x0000000f, hval);
  	nv_mask(priv, oreg, mask, oval);
  }
  
  /* If programming a TMDS output on a SOR that can also be configured for
   * DisplayPort, make sure NV50_SOR_DP_CTRL_ENABLE is forced off.
   *
   * It looks like the VBIOS TMDS scripts make an attempt at this, however,
   * the VBIOS scripts on at least one board I have only switch it off on
   * link 0, causing a blank display if the output has previously been
   * programmed for DisplayPort.
   */
  static void
  nv50_disp_intr_unk40_0_tmds(struct nv50_disp_priv *priv, struct dcb_output *outp)
  {
  	struct nouveau_bios *bios = nouveau_bios(priv);
  	const int link = !(outp->sorconf.link & 1);
  	const int   or = ffs(outp->or) - 1;
  	const u32 loff = (or * 0x800) + (link * 0x80);
  	const u16 mask = (outp->sorconf.link << 6) | outp->or;
  	struct dcb_output match;
  	u8  ver, hdr;
  
  	if (dcb_outp_match(bios, DCB_OUTPUT_DP, mask, &ver, &hdr, &match))
  		nv_mask(priv, 0x61c10c + loff, 0x00000001, 0x00000000);
  }
  
  static void
  nv50_disp_intr_unk40_0(struct nv50_disp_priv *priv, int head)
  {
  	struct nvkm_output *outp;
  	u32 pclk = nv_rd32(priv, 0x610ad0 + (head * 0x540)) & 0x3fffff;
  	u32 conf;
  
  	outp = exec_clkcmp(priv, head, 1, pclk, &conf);
  	if (!outp)
  		return;
  
  	if (outp->info.location == 0 && outp->info.type == DCB_OUTPUT_TMDS)
  		nv50_disp_intr_unk40_0_tmds(priv, &outp->info);
  }
  
  void
  nv50_disp_intr_supervisor(struct work_struct *work)
  {
  	struct nv50_disp_priv *priv =
  		container_of(work, struct nv50_disp_priv, supervisor);
  	struct nv50_disp_impl *impl = (void *)nv_object(priv)->oclass;
  	u32 super = nv_rd32(priv, 0x610030);
  	int head;
  
  	nv_debug(priv, "supervisor 0x%08x 0x%08x\n", priv->super, super);
  
  	if (priv->super & 0x00000010) {
  		nv50_disp_mthd_chan(priv, NV_DBG_DEBUG, 0, impl->mthd.core);
  		for (head = 0; head < priv->head.nr; head++) {
  			if (!(super & (0x00000020 << head)))
  				continue;
  			if (!(super & (0x00000080 << head)))
  				continue;
  			nv50_disp_intr_unk10_0(priv, head);
  		}
  	} else
  	if (priv->super & 0x00000020) {
  		for (head = 0; head < priv->head.nr; head++) {
  			if (!(super & (0x00000080 << head)))
  				continue;
  			nv50_disp_intr_unk20_0(priv, head);
  		}
  		for (head = 0; head < priv->head.nr; head++) {
  			if (!(super & (0x00000200 << head)))
  				continue;
  			nv50_disp_intr_unk20_1(priv, head);
  		}
  		for (head = 0; head < priv->head.nr; head++) {
  			if (!(super & (0x00000080 << head)))
  				continue;
  			nv50_disp_intr_unk20_2(priv, head);
  		}
  	} else
  	if (priv->super & 0x00000040) {
  		for (head = 0; head < priv->head.nr; head++) {
  			if (!(super & (0x00000080 << head)))
  				continue;
  			nv50_disp_intr_unk40_0(priv, head);
  		}
  	}
  
  	nv_wr32(priv, 0x610030, 0x80000000);
  }
  
  void
  nv50_disp_intr(struct nouveau_subdev *subdev)
  {
  	struct nv50_disp_priv *priv = (void *)subdev;
  	u32 intr0 = nv_rd32(priv, 0x610020);
  	u32 intr1 = nv_rd32(priv, 0x610024);
  
  	while (intr0 & 0x001f0000) {
  		u32 chid = __ffs(intr0 & 0x001f0000) - 16;
  		nv50_disp_intr_error(priv, chid);
  		intr0 &= ~(0x00010000 << chid);
  	}
  
  	while (intr0 & 0x0000001f) {
  		u32 chid = __ffs(intr0 & 0x0000001f);
  		nv50_disp_chan_uevent_send(priv, chid);
  		intr0 &= ~(0x00000001 << chid);
  	}
  
  	if (intr1 & 0x00000004) {
  		nouveau_disp_vblank(&priv->base, 0);
  		nv_wr32(priv, 0x610024, 0x00000004);
  		intr1 &= ~0x00000004;
  	}
  
  	if (intr1 & 0x00000008) {
  		nouveau_disp_vblank(&priv->base, 1);
  		nv_wr32(priv, 0x610024, 0x00000008);
  		intr1 &= ~0x00000008;
  	}
  
  	if (intr1 & 0x00000070) {
  		priv->super = (intr1 & 0x00000070);
  		schedule_work(&priv->supervisor);
  		nv_wr32(priv, 0x610024, priv->super);
  		intr1 &= ~0x00000070;
  	}
  }
  
  static int
  nv50_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
  	       struct nouveau_oclass *oclass, void *data, u32 size,
  	       struct nouveau_object **pobject)
  {
  	struct nv50_disp_priv *priv;
  	int ret;
  
  	ret = nouveau_disp_create(parent, engine, oclass, 2, "PDISP",
  				  "display", &priv);
  	*pobject = nv_object(priv);
  	if (ret)
  		return ret;
  
  	ret = nvkm_event_init(&nv50_disp_chan_uevent, 1, 9, &priv->uevent);
  	if (ret)
  		return ret;
  
  	nv_engine(priv)->sclass = nv50_disp_main_oclass;
  	nv_engine(priv)->cclass = &nv50_disp_cclass;
  	nv_subdev(priv)->intr = nv50_disp_intr;
  	INIT_WORK(&priv->supervisor, nv50_disp_intr_supervisor);
  	priv->sclass = nv50_disp_sclass;
  	priv->head.nr = 2;
  	priv->dac.nr = 3;
  	priv->sor.nr = 2;
  	priv->pior.nr = 3;
  	priv->dac.power = nv50_dac_power;
  	priv->dac.sense = nv50_dac_sense;
  	priv->sor.power = nv50_sor_power;
  	priv->pior.power = nv50_pior_power;
  	return 0;
  }
  
  struct nouveau_oclass *
  nv50_disp_outp_sclass[] = {
  	&nv50_pior_dp_impl.base.base,
  	NULL
  };
  
  struct nouveau_oclass *
  nv50_disp_oclass = &(struct nv50_disp_impl) {
  	.base.base.handle = NV_ENGINE(DISP, 0x50),
  	.base.base.ofuncs = &(struct nouveau_ofuncs) {
  		.ctor = nv50_disp_ctor,
  		.dtor = _nouveau_disp_dtor,
  		.init = _nouveau_disp_init,
  		.fini = _nouveau_disp_fini,
  	},
  	.base.vblank = &nv50_disp_vblank_func,
  	.base.outp =  nv50_disp_outp_sclass,
  	.mthd.core = &nv50_disp_core_mthd_chan,
  	.mthd.base = &nv50_disp_base_mthd_chan,
  	.mthd.ovly = &nv50_disp_ovly_mthd_chan,
  	.mthd.prev = 0x000004,
  	.head.scanoutpos = nv50_disp_main_scanoutpos,
  }.base.base;
  