drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv31.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv31.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv31.c
Extension
.c
Size
8231 bytes
Lines
299
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (type == 0x00000020 && mthd == 0x0000) {
			nvkm_mask(device, 0x00b308, 0x00000000, 0x00000000);
			show &= ~0x01000000;
		}

		if (type == 0x00000010) {
			if (nv31_mpeg_mthd(mpeg, mthd, data))
				show &= ~0x01000000;
		}
	}

	nvkm_wr32(device, 0x00b100, stat);
	nvkm_wr32(device, 0x00b230, 0x00000001);

	if (show) {
		nvkm_error(subdev, "ch %d [%s] %08x %08x %08x %08x\n",
			   mpeg->chan ? mpeg->chan->fifo->id : -1,
			   mpeg->chan ? mpeg->chan->fifo->name :
			   "unknown", stat, type, mthd, data);
	}

	spin_unlock_irqrestore(&mpeg->engine.lock, flags);
}

int
nv31_mpeg_init(struct nvkm_engine *mpeg)
{
	struct nvkm_subdev *subdev = &mpeg->subdev;
	struct nvkm_device *device = subdev->device;

	/* VPE init */
	nvkm_wr32(device, 0x00b0e0, 0x00000020); /* nvidia: rd 0x01, wr 0x20 */
	nvkm_wr32(device, 0x00b0e8, 0x00000020); /* nvidia: rd 0x01, wr 0x20 */

	/* PMPEG init */
	nvkm_wr32(device, 0x00b32c, 0x00000000);
	nvkm_wr32(device, 0x00b314, 0x00000100);
	nvkm_wr32(device, 0x00b220, 0x00000031);
	nvkm_wr32(device, 0x00b300, 0x02001ec1);
	nvkm_mask(device, 0x00b32c, 0x00000001, 0x00000001);

	nvkm_wr32(device, 0x00b100, 0xffffffff);
	nvkm_wr32(device, 0x00b140, 0xffffffff);

	if (nvkm_msec(device, 2000,
		if (!(nvkm_rd32(device, 0x00b200) & 0x00000001))
			break;
	) < 0) {
		nvkm_error(subdev, "timeout %08x\n",
			   nvkm_rd32(device, 0x00b200));
		return -EBUSY;
	}

	return 0;
}

static void *
nv31_mpeg_dtor(struct nvkm_engine *engine)
{
	return nv31_mpeg(engine);
}

static const struct nvkm_engine_func
nv31_mpeg_ = {
	.dtor = nv31_mpeg_dtor,
	.init = nv31_mpeg_init,
	.intr = nv31_mpeg_intr,
	.tile = nv31_mpeg_tile,
	.fifo.cclass = nv31_mpeg_chan_new,
	.sclass = {
		{ -1, -1, NV31_MPEG, &nv31_mpeg_object },
		{}
	}
};

int
nv31_mpeg_new_(const struct nv31_mpeg_func *func, struct nvkm_device *device,
	       enum nvkm_subdev_type type, int inst, struct nvkm_engine **pmpeg)
{
	struct nv31_mpeg *mpeg;

	if (!(mpeg = kzalloc_obj(*mpeg)))
		return -ENOMEM;
	mpeg->func = func;
	*pmpeg = &mpeg->engine;

	return nvkm_engine_ctor(&nv31_mpeg_, device, type, inst, true, &mpeg->engine);
}

static const struct nv31_mpeg_func

Annotation

Implementation Notes