drivers/gpu/drm/nouveau/nvkm/subdev/devinit/ga100.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/devinit/ga100.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/devinit/ga100.c
Extension
.c
Size
2854 bytes
Lines
93
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

#include "nv50.h"

#include <subdev/bios.h>
#include <subdev/bios/pll.h>
#include <subdev/clk/pll.h>
#include <subdev/gsp.h>

static int
ga100_devinit_pll_set(struct nvkm_devinit *init, u32 type, u32 freq)
{
	struct nvkm_subdev *subdev = &init->subdev;
	struct nvkm_device *device = subdev->device;
	struct nvbios_pll info;
	int head = type - PLL_VPLL0;
	int N, fN, M, P;
	int ret;

	ret = nvbios_pll_parse(device->bios, type, &info);
	if (ret)
		return ret;

	ret = gt215_pll_calc(subdev, &info, freq, &N, &fN, &M, &P);
	if (ret < 0)
		return ret;

	switch (info.type) {
	case PLL_VPLL0:
	case PLL_VPLL1:
	case PLL_VPLL2:
	case PLL_VPLL3:
		nvkm_wr32(device, 0x00ef00 + (head * 0x40), 0x02080004);
		nvkm_wr32(device, 0x00ef18 + (head * 0x40), (N << 16) | fN);
		nvkm_wr32(device, 0x00ef04 + (head * 0x40), (P << 16) | M);
		nvkm_wr32(device, 0x00e9c0 + (head * 0x04), 0x00000001);
		break;
	default:
		nvkm_warn(subdev, "%08x/%dKhz unimplemented\n", type, freq);
		ret = -EINVAL;
		break;
	}

	return ret;
}

static void
ga100_devinit_disable(struct nvkm_devinit *init)
{
	struct nvkm_device *device = init->subdev.device;
	u32 r820c04 = nvkm_rd32(device, 0x820c04);

	if (r820c04 & 0x00000001)
		nvkm_subdev_disable(device, NVKM_ENGINE_DISP, 0);
}

static const struct nvkm_devinit_func
ga100_devinit = {
	.disable = ga100_devinit_disable,
	.init = nv50_devinit_init,
	.post = tu102_devinit_post,
	.pll_set = ga100_devinit_pll_set,
};

int
ga100_devinit_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
		  struct nvkm_devinit **pinit)
{
	if (nvkm_gsp_rm(device->gsp))
		return r535_devinit_new(&ga100_devinit, device, type, inst, pinit);

	return nv50_devinit_new_(&ga100_devinit, device, type, inst, pinit);
}

Annotation

Implementation Notes