drivers/gpu/drm/nouveau/dispnv50/wimmc37b.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/dispnv50/wimmc37b.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/dispnv50/wimmc37b.c
Extension
.c
Size
2688 bytes
Lines
94
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 "wimm.h"
#include "atom.h"
#include "wndw.h"

#include <nvif/if0014.h>
#include <nvif/pushc37b.h>

#include <nvhw/class/clc37b.h>

static int
wimmc37b_update(struct nv50_wndw *wndw, u32 *interlock)
{
	struct nvif_push *push = &wndw->wimm.push;
	int ret;

	if ((ret = PUSH_WAIT(push, 2)))
		return ret;

	PUSH_MTHD(push, NVC37B, UPDATE, 0x00000001 |
		  NVVAL(NVC37B, UPDATE, INTERLOCK_WITH_WINDOW,
			!!(interlock[NV50_DISP_INTERLOCK_WNDW] & wndw->interlock.data)));
	return PUSH_KICK(push);
}

static int
wimmc37b_point(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
{
	struct nvif_push *push = &wndw->wimm.push;
	int ret;

	if ((ret = PUSH_WAIT(push, 2)))
		return ret;

	PUSH_MTHD(push, NVC37B, SET_POINT_OUT(0),
		  NVVAL(NVC37B, SET_POINT_OUT, X, asyw->point.x) |
		  NVVAL(NVC37B, SET_POINT_OUT, Y, asyw->point.y));
	return 0;
}

static const struct nv50_wimm_func
wimmc37b = {
	.point = wimmc37b_point,
	.update = wimmc37b_update,
};

static int
wimmc37b_init_(const struct nv50_wimm_func *func, struct nouveau_drm *drm,
	       s32 oclass, struct nv50_wndw *wndw)
{
	struct nvif_disp_chan_v0 args = {
		.id = wndw->id,
	};
	int ret;

	ret = nv50_dmac_create(drm,
			       &oclass, 0, &args, sizeof(args), -1,
			       &wndw->wimm);
	if (ret) {
		NV_ERROR(drm, "wimm%04x allocation failed: %d\n", oclass, ret);
		return ret;
	}

	wndw->interlock.wimm = wndw->interlock.data;
	wndw->immd = func;
	return 0;
}

int
wimmc37b_init(struct nouveau_drm *drm, s32 oclass, struct nv50_wndw *wndw)
{
	return wimmc37b_init_(&wimmc37b, drm, oclass, wndw);
}

Annotation

Implementation Notes