drivers/gpu/drm/nouveau/nv31_mpeg.c - kernel/mindspeed - Git at Google

 /*
  * Copyright 2011 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 "drmP.h"
 #include "nouveau_drv.h"
 #include "nouveau_ramht.h"

 struct nv31_mpeg_engine {
 	struct nouveau_exec_engine base;
 	atomic_t refcount;
 };


 static int
 nv31_mpeg_context_new(struct nouveau_channel *chan, int engine)
 {
 	struct nv31_mpeg_engine *pmpeg = nv_engine(chan->dev, engine);

 	if (!atomic_add_unless(&pmpeg->refcount, 1, 1))
 		return -EBUSY;

 	chan->engctx[engine] = (void *)0xdeadcafe;
 	return 0;
 }

 static void
 nv31_mpeg_context_del(struct nouveau_channel *chan, int engine)
 {
 	struct nv31_mpeg_engine *pmpeg = nv_engine(chan->dev, engine);
 	atomic_dec(&pmpeg->refcount);
 	chan->engctx[engine] = NULL;
 }

 static int
 nv40_mpeg_context_new(struct nouveau_channel *chan, int engine)
 {
 	struct drm_device *dev = chan->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_gpuobj *ctx = NULL;
 	unsigned long flags;
 	int ret;

 	NV_DEBUG(dev, "ch%d\n", chan->id);

 	ret = nouveau_gpuobj_new(dev, NULL, 264 * 4, 16, NVOBJ_FLAG_ZERO_ALLOC |
 				 NVOBJ_FLAG_ZERO_FREE, &ctx);
 	if (ret)
 		return ret;

 	nv_wo32(ctx, 0x78, 0x02001ec1);

 	spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
 	nv_mask(dev, 0x002500, 0x00000001, 0x00000000);
 	if ((nv_rd32(dev, 0x003204) & 0x1f) == chan->id)
 		nv_wr32(dev, 0x00330c, ctx->pinst >> 4);
 	nv_wo32(chan->ramfc, 0x54, ctx->pinst >> 4);
 	nv_mask(dev, 0x002500, 0x00000001, 0x00000001);
 	spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);

 	chan->engctx[engine] = ctx;
 	return 0;
 }

 static void
 nv40_mpeg_context_del(struct nouveau_channel *chan, int engine)
 {
 	struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
 	struct nouveau_gpuobj *ctx = chan->engctx[engine];
 	struct drm_device *dev = chan->dev;
 	unsigned long flags;
 	u32 inst = 0x80000000 | (ctx->pinst >> 4);

 	spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
 	nv_mask(dev, 0x00b32c, 0x00000001, 0x00000000);
 	if (nv_rd32(dev, 0x00b318) == inst)
 		nv_mask(dev, 0x00b318, 0x80000000, 0x00000000);
 	nv_mask(dev, 0x00b32c, 0x00000001, 0x00000001);
 	spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);

 	nouveau_gpuobj_ref(NULL, &ctx);
 	chan->engctx[engine] = NULL;
 }

 static int
 nv31_mpeg_object_new(struct nouveau_channel *chan, int engine,
 		      u32 handle, u16 class)
 {
 	struct drm_device *dev = chan->dev;
 	struct nouveau_gpuobj *obj = NULL;
 	int ret;

 	ret = nouveau_gpuobj_new(dev, chan, 20, 16, NVOBJ_FLAG_ZERO_ALLOC |
 				 NVOBJ_FLAG_ZERO_FREE, &obj);
 	if (ret)
 		return ret;
 	obj->engine = 2;
 	obj->class  = class;

 	nv_wo32(obj, 0x00, class);

 	ret = nouveau_ramht_insert(chan, handle, obj);
 	nouveau_gpuobj_ref(NULL, &obj);
 	return ret;
 }

 static int
 nv31_mpeg_init(struct drm_device *dev, int engine)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nv31_mpeg_engine *pmpeg = nv_engine(dev, engine);
 	int i;

 	/* VPE init */
 	nv_mask(dev, 0x000200, 0x00000002, 0x00000000);
 	nv_mask(dev, 0x000200, 0x00000002, 0x00000002);
 	nv_wr32(dev, 0x00b0e0, 0x00000020); /* nvidia: rd 0x01, wr 0x20 */
 	nv_wr32(dev, 0x00b0e8, 0x00000020); /* nvidia: rd 0x01, wr 0x20 */

 	for (i = 0; i < dev_priv->engine.fb.num_tiles; i++)
 		pmpeg->base.set_tile_region(dev, i);

 	/* PMPEG init */
 	nv_wr32(dev, 0x00b32c, 0x00000000);
 	nv_wr32(dev, 0x00b314, 0x00000100);
 	nv_wr32(dev, 0x00b220, nv44_graph_class(dev) ? 0x00000044 : 0x00000031);
 	nv_wr32(dev, 0x00b300, 0x02001ec1);
 	nv_mask(dev, 0x00b32c, 0x00000001, 0x00000001);

 	nv_wr32(dev, 0x00b100, 0xffffffff);
 	nv_wr32(dev, 0x00b140, 0xffffffff);

 	if (!nv_wait(dev, 0x00b200, 0x00000001, 0x00000000)) {
 		NV_ERROR(dev, "PMPEG init: 0x%08x\n", nv_rd32(dev, 0x00b200));
 		return -EBUSY;
 	}

 	return 0;
 }

 static int
 nv31_mpeg_fini(struct drm_device *dev, int engine, bool suspend)
 {
 	/*XXX: context save? */
 	nv_mask(dev, 0x00b32c, 0x00000001, 0x00000000);
 	nv_wr32(dev, 0x00b140, 0x00000000);
 	return 0;
 }

 static int
 nv31_mpeg_mthd_dma(struct nouveau_channel *chan, u32 class, u32 mthd, u32 data)
 {
 	struct drm_device *dev = chan->dev;
 	u32 inst = data << 4;
 	u32 dma0 = nv_ri32(dev, inst + 0);
 	u32 dma1 = nv_ri32(dev, inst + 4);
 	u32 dma2 = nv_ri32(dev, inst + 8);
 	u32 base = (dma2 & 0xfffff000) | (dma0 >> 20);
 	u32 size = dma1 + 1;

 	/* only allow linear DMA objects */
 	if (!(dma0 & 0x00002000))
 		return -EINVAL;

 	if (mthd == 0x0190) {
 		/* DMA_CMD */
 		nv_mask(dev, 0x00b300, 0x00030000, (dma0 & 0x00030000));
 		nv_wr32(dev, 0x00b334, base);
 		nv_wr32(dev, 0x00b324, size);
 	} else
 	if (mthd == 0x01a0) {
 		/* DMA_DATA */
 		nv_mask(dev, 0x00b300, 0x000c0000, (dma0 & 0x00030000) << 2);
 		nv_wr32(dev, 0x00b360, base);
 		nv_wr32(dev, 0x00b364, size);
 	} else {
 		/* DMA_IMAGE, VRAM only */
 		if (dma0 & 0x000c0000)
 			return -EINVAL;

 		nv_wr32(dev, 0x00b370, base);
 		nv_wr32(dev, 0x00b374, size);
 	}

 	return 0;
 }

 static int
 nv31_mpeg_isr_chid(struct drm_device *dev, u32 inst)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_gpuobj *ctx;
 	unsigned long flags;
 	int i;

 	/* hardcode drm channel id on nv3x, so swmthd lookup works */
 	if (dev_priv->card_type < NV_40)
 		return 0;

 	spin_lock_irqsave(&dev_priv->channels.lock, flags);
 	for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
 		if (!dev_priv->channels.ptr[i])
 			continue;

 		ctx = dev_priv->channels.ptr[i]->engctx[NVOBJ_ENGINE_MPEG];
 		if (ctx && ctx->pinst == inst)
 			break;
 	}
 	spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
 	return i;
 }

 static void
 nv31_vpe_set_tile_region(struct drm_device *dev, int i)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];

 	nv_wr32(dev, 0x00b008 + (i * 0x10), tile->pitch);
 	nv_wr32(dev, 0x00b004 + (i * 0x10), tile->limit);
 	nv_wr32(dev, 0x00b000 + (i * 0x10), tile->addr);
 }

 static void
 nv31_mpeg_isr(struct drm_device *dev)
 {
 	u32 inst = (nv_rd32(dev, 0x00b318) & 0x000fffff) << 4;
 	u32 chid = nv31_mpeg_isr_chid(dev, inst);
 	u32 stat = nv_rd32(dev, 0x00b100);
 	u32 type = nv_rd32(dev, 0x00b230);
 	u32 mthd = nv_rd32(dev, 0x00b234);
 	u32 data = nv_rd32(dev, 0x00b238);
 	u32 show = stat;

 	if (stat & 0x01000000) {
 		/* happens on initial binding of the object */
 		if (type == 0x00000020 && mthd == 0x0000) {
 			nv_mask(dev, 0x00b308, 0x00000000, 0x00000000);
 			show &= ~0x01000000;
 		}

 		if (type == 0x00000010) {
 			if (!nouveau_gpuobj_mthd_call2(dev, chid, 0x3174, mthd, data))
 				show &= ~0x01000000;
 		}
 	}

 	nv_wr32(dev, 0x00b100, stat);
 	nv_wr32(dev, 0x00b230, 0x00000001);

 	if (show && nouveau_ratelimit()) {
 		NV_INFO(dev, "PMPEG: Ch %d [0x%08x] 0x%08x 0x%08x 0x%08x 0x%08x\n",
 			chid, inst, stat, type, mthd, data);
 	}
 }

 static void
 nv31_vpe_isr(struct drm_device *dev)
 {
 	if (nv_rd32(dev, 0x00b100))
 		nv31_mpeg_isr(dev);

 	if (nv_rd32(dev, 0x00b800)) {
 		u32 stat = nv_rd32(dev, 0x00b800);
 		NV_INFO(dev, "PMSRCH: 0x%08x\n", stat);
 		nv_wr32(dev, 0xb800, stat);
 	}
 }

 static void
 nv31_mpeg_destroy(struct drm_device *dev, int engine)
 {
 	struct nv31_mpeg_engine *pmpeg = nv_engine(dev, engine);

 	nouveau_irq_unregister(dev, 0);

 	NVOBJ_ENGINE_DEL(dev, MPEG);
 	kfree(pmpeg);
 }

 int
 nv31_mpeg_create(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nv31_mpeg_engine *pmpeg;

 	pmpeg = kzalloc(sizeof(*pmpeg), GFP_KERNEL);
 	if (!pmpeg)
 		return -ENOMEM;
 	atomic_set(&pmpeg->refcount, 0);

 	pmpeg->base.destroy = nv31_mpeg_destroy;
 	pmpeg->base.init = nv31_mpeg_init;
 	pmpeg->base.fini = nv31_mpeg_fini;
 	if (dev_priv->card_type < NV_40) {
 		pmpeg->base.context_new = nv31_mpeg_context_new;
 		pmpeg->base.context_del = nv31_mpeg_context_del;
 	} else {
 		pmpeg->base.context_new = nv40_mpeg_context_new;
 		pmpeg->base.context_del = nv40_mpeg_context_del;
 	}
 	pmpeg->base.object_new = nv31_mpeg_object_new;

 	/* ISR vector, PMC_ENABLE bit,  and TILE regs are shared between
 	 * all VPE engines, for this driver's purposes the PMPEG engine
 	 * will be treated as the "master" and handle the global VPE
 	 * bits too
 	 */
 	pmpeg->base.set_tile_region = nv31_vpe_set_tile_region;
 	nouveau_irq_register(dev, 0, nv31_vpe_isr);

 	NVOBJ_ENGINE_ADD(dev, MPEG, &pmpeg->base);
 	NVOBJ_CLASS(dev, 0x3174, MPEG);
 	NVOBJ_MTHD (dev, 0x3174, 0x0190, nv31_mpeg_mthd_dma);
 	NVOBJ_MTHD (dev, 0x3174, 0x01a0, nv31_mpeg_mthd_dma);
 	NVOBJ_MTHD (dev, 0x3174, 0x01b0, nv31_mpeg_mthd_dma);

 #if 0
 	NVOBJ_ENGINE_ADD(dev, ME, &pme->base);
 	NVOBJ_CLASS(dev, 0x4075, ME);
 #endif
 	return 0;

 }
	/*
	* Copyright 2011 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 "drmP.h"
	#include "nouveau_drv.h"
	#include "nouveau_ramht.h"

	struct nv31_mpeg_engine {
	struct nouveau_exec_engine base;
	atomic_t refcount;
	};


	static int
	nv31_mpeg_context_new(struct nouveau_channel *chan, int engine)
	{
	struct nv31_mpeg_engine *pmpeg = nv_engine(chan->dev, engine);

	if (!atomic_add_unless(&pmpeg->refcount, 1, 1))
	return -EBUSY;

	chan->engctx[engine] = (void *)0xdeadcafe;
	return 0;
	}

	static void
	nv31_mpeg_context_del(struct nouveau_channel *chan, int engine)
	{
	struct nv31_mpeg_engine *pmpeg = nv_engine(chan->dev, engine);
	atomic_dec(&pmpeg->refcount);
	chan->engctx[engine] = NULL;
	}

	static int
	nv40_mpeg_context_new(struct nouveau_channel *chan, int engine)
	{
	struct drm_device *dev = chan->dev;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_gpuobj *ctx = NULL;
	unsigned long flags;
	int ret;

	NV_DEBUG(dev, "ch%d\n", chan->id);

	ret = nouveau_gpuobj_new(dev, NULL, 264 * 4, 16, NVOBJ_FLAG_ZERO_ALLOC \|
	NVOBJ_FLAG_ZERO_FREE, &ctx);
	if (ret)
	return ret;

	nv_wo32(ctx, 0x78, 0x02001ec1);

	spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
	nv_mask(dev, 0x002500, 0x00000001, 0x00000000);
	if ((nv_rd32(dev, 0x003204) & 0x1f) == chan->id)
	nv_wr32(dev, 0x00330c, ctx->pinst >> 4);
	nv_wo32(chan->ramfc, 0x54, ctx->pinst >> 4);
	nv_mask(dev, 0x002500, 0x00000001, 0x00000001);
	spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);

	chan->engctx[engine] = ctx;
	return 0;
	}

	static void
	nv40_mpeg_context_del(struct nouveau_channel *chan, int engine)
	{
	struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
	struct nouveau_gpuobj *ctx = chan->engctx[engine];
	struct drm_device *dev = chan->dev;
	unsigned long flags;
	u32 inst = 0x80000000 \| (ctx->pinst >> 4);

	spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
	nv_mask(dev, 0x00b32c, 0x00000001, 0x00000000);
	if (nv_rd32(dev, 0x00b318) == inst)
	nv_mask(dev, 0x00b318, 0x80000000, 0x00000000);
	nv_mask(dev, 0x00b32c, 0x00000001, 0x00000001);
	spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);

	nouveau_gpuobj_ref(NULL, &ctx);
	chan->engctx[engine] = NULL;
	}

	static int
	nv31_mpeg_object_new(struct nouveau_channel *chan, int engine,
	u32 handle, u16 class)
	{
	struct drm_device *dev = chan->dev;
	struct nouveau_gpuobj *obj = NULL;
	int ret;

	ret = nouveau_gpuobj_new(dev, chan, 20, 16, NVOBJ_FLAG_ZERO_ALLOC \|
	NVOBJ_FLAG_ZERO_FREE, &obj);
	if (ret)
	return ret;
	obj->engine = 2;
	obj->class = class;

	nv_wo32(obj, 0x00, class);

	ret = nouveau_ramht_insert(chan, handle, obj);
	nouveau_gpuobj_ref(NULL, &obj);
	return ret;
	}

	static int
	nv31_mpeg_init(struct drm_device *dev, int engine)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nv31_mpeg_engine *pmpeg = nv_engine(dev, engine);
	int i;

	/* VPE init */
	nv_mask(dev, 0x000200, 0x00000002, 0x00000000);
	nv_mask(dev, 0x000200, 0x00000002, 0x00000002);
	nv_wr32(dev, 0x00b0e0, 0x00000020); /* nvidia: rd 0x01, wr 0x20 */
	nv_wr32(dev, 0x00b0e8, 0x00000020); /* nvidia: rd 0x01, wr 0x20 */

	for (i = 0; i < dev_priv->engine.fb.num_tiles; i++)
	pmpeg->base.set_tile_region(dev, i);

	/* PMPEG init */
	nv_wr32(dev, 0x00b32c, 0x00000000);
	nv_wr32(dev, 0x00b314, 0x00000100);
	nv_wr32(dev, 0x00b220, nv44_graph_class(dev) ? 0x00000044 : 0x00000031);
	nv_wr32(dev, 0x00b300, 0x02001ec1);
	nv_mask(dev, 0x00b32c, 0x00000001, 0x00000001);

	nv_wr32(dev, 0x00b100, 0xffffffff);
	nv_wr32(dev, 0x00b140, 0xffffffff);

	if (!nv_wait(dev, 0x00b200, 0x00000001, 0x00000000)) {
	NV_ERROR(dev, "PMPEG init: 0x%08x\n", nv_rd32(dev, 0x00b200));
	return -EBUSY;
	}

	return 0;
	}

	static int
	nv31_mpeg_fini(struct drm_device *dev, int engine, bool suspend)
	{
	/XXX: context save? /
	nv_mask(dev, 0x00b32c, 0x00000001, 0x00000000);
	nv_wr32(dev, 0x00b140, 0x00000000);
	return 0;
	}

	static int
	nv31_mpeg_mthd_dma(struct nouveau_channel *chan, u32 class, u32 mthd, u32 data)
	{
	struct drm_device *dev = chan->dev;
	u32 inst = data << 4;
	u32 dma0 = nv_ri32(dev, inst + 0);
	u32 dma1 = nv_ri32(dev, inst + 4);
	u32 dma2 = nv_ri32(dev, inst + 8);
	u32 base = (dma2 & 0xfffff000) \| (dma0 >> 20);
	u32 size = dma1 + 1;

	/* only allow linear DMA objects */
	if (!(dma0 & 0x00002000))
	return -EINVAL;

	if (mthd == 0x0190) {
	/* DMA_CMD */
	nv_mask(dev, 0x00b300, 0x00030000, (dma0 & 0x00030000));
	nv_wr32(dev, 0x00b334, base);
	nv_wr32(dev, 0x00b324, size);
	} else
	if (mthd == 0x01a0) {
	/* DMA_DATA */
	nv_mask(dev, 0x00b300, 0x000c0000, (dma0 & 0x00030000) << 2);
	nv_wr32(dev, 0x00b360, base);
	nv_wr32(dev, 0x00b364, size);
	} else {
	/* DMA_IMAGE, VRAM only */
	if (dma0 & 0x000c0000)
	return -EINVAL;

	nv_wr32(dev, 0x00b370, base);
	nv_wr32(dev, 0x00b374, size);
	}

	return 0;
	}

	static int
	nv31_mpeg_isr_chid(struct drm_device *dev, u32 inst)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_gpuobj *ctx;
	unsigned long flags;
	int i;

	/* hardcode drm channel id on nv3x, so swmthd lookup works */
	if (dev_priv->card_type < NV_40)
	return 0;

	spin_lock_irqsave(&dev_priv->channels.lock, flags);
	for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
	if (!dev_priv->channels.ptr[i])
	continue;

	ctx = dev_priv->channels.ptr[i]->engctx[NVOBJ_ENGINE_MPEG];
	if (ctx && ctx->pinst == inst)
	break;
	}
	spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
	return i;
	}

	static void
	nv31_vpe_set_tile_region(struct drm_device *dev, int i)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];

	nv_wr32(dev, 0x00b008 + (i * 0x10), tile->pitch);
	nv_wr32(dev, 0x00b004 + (i * 0x10), tile->limit);
	nv_wr32(dev, 0x00b000 + (i * 0x10), tile->addr);
	}

	static void
	nv31_mpeg_isr(struct drm_device *dev)
	{
	u32 inst = (nv_rd32(dev, 0x00b318) & 0x000fffff) << 4;
	u32 chid = nv31_mpeg_isr_chid(dev, inst);
	u32 stat = nv_rd32(dev, 0x00b100);
	u32 type = nv_rd32(dev, 0x00b230);
	u32 mthd = nv_rd32(dev, 0x00b234);
	u32 data = nv_rd32(dev, 0x00b238);
	u32 show = stat;

	if (stat & 0x01000000) {
	/* happens on initial binding of the object */
	if (type == 0x00000020 && mthd == 0x0000) {
	nv_mask(dev, 0x00b308, 0x00000000, 0x00000000);
	show &= ~0x01000000;
	}

	if (type == 0x00000010) {
	if (!nouveau_gpuobj_mthd_call2(dev, chid, 0x3174, mthd, data))
	show &= ~0x01000000;
	}
	}

	nv_wr32(dev, 0x00b100, stat);
	nv_wr32(dev, 0x00b230, 0x00000001);

	if (show && nouveau_ratelimit()) {
	NV_INFO(dev, "PMPEG: Ch %d [0x%08x] 0x%08x 0x%08x 0x%08x 0x%08x\n",
	chid, inst, stat, type, mthd, data);
	}
	}

	static void
	nv31_vpe_isr(struct drm_device *dev)
	{
	if (nv_rd32(dev, 0x00b100))
	nv31_mpeg_isr(dev);

	if (nv_rd32(dev, 0x00b800)) {
	u32 stat = nv_rd32(dev, 0x00b800);
	NV_INFO(dev, "PMSRCH: 0x%08x\n", stat);
	nv_wr32(dev, 0xb800, stat);
	}
	}

	static void
	nv31_mpeg_destroy(struct drm_device *dev, int engine)
	{
	struct nv31_mpeg_engine *pmpeg = nv_engine(dev, engine);

	nouveau_irq_unregister(dev, 0);

	NVOBJ_ENGINE_DEL(dev, MPEG);
	kfree(pmpeg);
	}

	int
	nv31_mpeg_create(struct drm_device *dev)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nv31_mpeg_engine *pmpeg;

	pmpeg = kzalloc(sizeof(*pmpeg), GFP_KERNEL);
	if (!pmpeg)
	return -ENOMEM;
	atomic_set(&pmpeg->refcount, 0);

	pmpeg->base.destroy = nv31_mpeg_destroy;
	pmpeg->base.init = nv31_mpeg_init;
	pmpeg->base.fini = nv31_mpeg_fini;
	if (dev_priv->card_type < NV_40) {
	pmpeg->base.context_new = nv31_mpeg_context_new;
	pmpeg->base.context_del = nv31_mpeg_context_del;
	} else {
	pmpeg->base.context_new = nv40_mpeg_context_new;
	pmpeg->base.context_del = nv40_mpeg_context_del;
	}
	pmpeg->base.object_new = nv31_mpeg_object_new;

	/* ISR vector, PMC_ENABLE bit, and TILE regs are shared between
	* all VPE engines, for this driver's purposes the PMPEG engine
	* will be treated as the "master" and handle the global VPE
	* bits too
	*/
	pmpeg->base.set_tile_region = nv31_vpe_set_tile_region;
	nouveau_irq_register(dev, 0, nv31_vpe_isr);

	NVOBJ_ENGINE_ADD(dev, MPEG, &pmpeg->base);
	NVOBJ_CLASS(dev, 0x3174, MPEG);
	NVOBJ_MTHD (dev, 0x3174, 0x0190, nv31_mpeg_mthd_dma);
	NVOBJ_MTHD (dev, 0x3174, 0x01a0, nv31_mpeg_mthd_dma);
	NVOBJ_MTHD (dev, 0x3174, 0x01b0, nv31_mpeg_mthd_dma);

	#if 0
	NVOBJ_ENGINE_ADD(dev, ME, &pme->base);
	NVOBJ_CLASS(dev, 0x4075, ME);
	#endif
	return 0;

	}