summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/nouveau/dispnv50/wndw.c
blob: c5a9bc1af5af79038d938de1f8cb3a85dc35dac8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
/*
 * Copyright 2018 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.
 */
#include "wndw.h"
#include "wimm.h"

#include <nvif/class.h>
#include <nvif/cl0002.h>

#include <drm/drm_atomic_helper.h>
#include "nouveau_bo.h"

static void
nv50_wndw_ctxdma_del(struct nv50_wndw_ctxdma *ctxdma)
{
	nvif_object_fini(&ctxdma->object);
	list_del(&ctxdma->head);
	kfree(ctxdma);
}

static struct nv50_wndw_ctxdma *
nv50_wndw_ctxdma_new(struct nv50_wndw *wndw, struct nouveau_framebuffer *fb)
{
	struct nouveau_drm *drm = nouveau_drm(fb->base.dev);
	struct nv50_wndw_ctxdma *ctxdma;
	const u8    kind = fb->nvbo->kind;
	const u32 handle = 0xfb000000 | kind;
	struct {
		struct nv_dma_v0 base;
		union {
			struct nv50_dma_v0 nv50;
			struct gf100_dma_v0 gf100;
			struct gf119_dma_v0 gf119;
		};
	} args = {};
	u32 argc = sizeof(args.base);
	int ret;

	list_for_each_entry(ctxdma, &wndw->ctxdma.list, head) {
		if (ctxdma->object.handle == handle)
			return ctxdma;
	}

	if (!(ctxdma = kzalloc(sizeof(*ctxdma), GFP_KERNEL)))
		return ERR_PTR(-ENOMEM);
	list_add(&ctxdma->head, &wndw->ctxdma.list);

	args.base.target = NV_DMA_V0_TARGET_VRAM;
	args.base.access = NV_DMA_V0_ACCESS_RDWR;
	args.base.start  = 0;
	args.base.limit  = drm->client.device.info.ram_user - 1;

	if (drm->client.device.info.chipset < 0x80) {
		args.nv50.part = NV50_DMA_V0_PART_256;
		argc += sizeof(args.nv50);
	} else
	if (drm->client.device.info.chipset < 0xc0) {
		args.nv50.part = NV50_DMA_V0_PART_256;
		args.nv50.kind = kind;
		argc += sizeof(args.nv50);
	} else
	if (drm->client.device.info.chipset < 0xd0) {
		args.gf100.kind = kind;
		argc += sizeof(args.gf100);
	} else {
		args.gf119.page = GF119_DMA_V0_PAGE_LP;
		args.gf119.kind = kind;
		argc += sizeof(args.gf119);
	}

	ret = nvif_object_init(wndw->ctxdma.parent, handle, NV_DMA_IN_MEMORY,
			       &args, argc, &ctxdma->object);
	if (ret) {
		nv50_wndw_ctxdma_del(ctxdma);
		return ERR_PTR(ret);
	}

	return ctxdma;
}

int
nv50_wndw_wait_armed(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
{
	struct nv50_disp *disp = nv50_disp(wndw->plane.dev);
	if (asyw->set.ntfy) {
		return wndw->func->ntfy_wait_begun(disp->sync,
						   asyw->ntfy.offset,
						   wndw->wndw.base.device);
	}
	return 0;
}

void
nv50_wndw_flush_clr(struct nv50_wndw *wndw, u32 *interlock, bool flush,
		    struct nv50_wndw_atom *asyw)
{
	union nv50_wndw_atom_mask clr = {
		.mask = asyw->clr.mask & ~(flush ? 0 : asyw->set.mask),
	};
	if (clr.sema ) wndw->func-> sema_clr(wndw);
	if (clr.ntfy ) wndw->func-> ntfy_clr(wndw);
	if (clr.xlut ) wndw->func-> xlut_clr(wndw);
	if (clr.image) wndw->func->image_clr(wndw);

	interlock[wndw->interlock.type] |= wndw->interlock.data;
}

void
nv50_wndw_flush_set(struct nv50_wndw *wndw, u32 *interlock,
		    struct nv50_wndw_atom *asyw)
{
	if (interlock) {
		asyw->image.mode = 0;
		asyw->image.interval = 1;
	}

	if (asyw->set.sema ) wndw->func->sema_set (wndw, asyw);
	if (asyw->set.ntfy ) wndw->func->ntfy_set (wndw, asyw);
	if (asyw->set.image) wndw->func->image_set(wndw, asyw);

	if (asyw->set.xlut ) {
		if (asyw->ilut) {
			asyw->xlut.i.offset =
				nv50_lut_load(&wndw->ilut,
					      asyw->xlut.i.mode <= 1,
					      asyw->xlut.i.buffer,
					      asyw->ilut);
		}
		wndw->func->xlut_set(wndw, asyw);
	}

	if (asyw->set.scale) wndw->func->scale_set(wndw, asyw);
	if (asyw->set.point) {
		if (asyw->set.point = false, asyw->set.mask)
			interlock[wndw->interlock.type] |= wndw->interlock.data;
		interlock[NV50_DISP_INTERLOCK_WIMM] |= wndw->interlock.data;

		wndw->immd->point(wndw, asyw);
		wndw->immd->update(wndw, interlock);
	} else {
		interlock[wndw->interlock.type] |= wndw->interlock.data;
	}
}

void
nv50_wndw_ntfy_enable(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
{
	struct nv50_disp *disp = nv50_disp(wndw->plane.dev);

	asyw->ntfy.handle = wndw->wndw.sync.handle;
	asyw->ntfy.offset = wndw->ntfy;
	asyw->ntfy.awaken = false;
	asyw->set.ntfy = true;

	wndw->func->ntfy_reset(disp->sync, wndw->ntfy);
	wndw->ntfy ^= 0x10;
}

static void
nv50_wndw_atomic_check_release(struct nv50_wndw *wndw,
			       struct nv50_wndw_atom *asyw,
			       struct nv50_head_atom *asyh)
{
	struct nouveau_drm *drm = nouveau_drm(wndw->plane.dev);
	NV_ATOMIC(drm, "%s release\n", wndw->plane.name);
	wndw->func->release(wndw, asyw, asyh);
	asyw->ntfy.handle = 0;
	asyw->sema.handle = 0;
}

static int
nv50_wndw_atomic_check_acquire_yuv(struct nv50_wndw_atom *asyw)
{
	switch (asyw->state.fb->format->format) {
	case DRM_FORMAT_YUYV: asyw->image.format = 0x28; break;
	case DRM_FORMAT_UYVY: asyw->image.format = 0x29; break;
	default:
		WARN_ON(1);
		return -EINVAL;
	}
	asyw->image.colorspace = 1;
	return 0;
}

static int
nv50_wndw_atomic_check_acquire_rgb(struct nv50_wndw_atom *asyw)
{
	switch (asyw->state.fb->format->format) {
	case DRM_FORMAT_C8         : asyw->image.format = 0x1e; break;
	case DRM_FORMAT_XRGB8888   :
	case DRM_FORMAT_ARGB8888   : asyw->image.format = 0xcf; break;
	case DRM_FORMAT_RGB565     : asyw->image.format = 0xe8; break;
	case DRM_FORMAT_XRGB1555   :
	case DRM_FORMAT_ARGB1555   : asyw->image.format = 0xe9; break;
	case DRM_FORMAT_XBGR2101010:
	case DRM_FORMAT_ABGR2101010: asyw->image.format = 0xd1; break;
	case DRM_FORMAT_XBGR8888   :
	case DRM_FORMAT_ABGR8888   : asyw->image.format = 0xd5; break;
	case DRM_FORMAT_XRGB2101010:
	case DRM_FORMAT_ARGB2101010: asyw->image.format = 0xdf; break;
	default:
		return -EINVAL;
	}
	asyw->image.colorspace = 0;
	return 0;
}

static int
nv50_wndw_atomic_check_acquire(struct nv50_wndw *wndw, bool modeset,
			       struct nv50_wndw_atom *armw,
			       struct nv50_wndw_atom *asyw,
			       struct nv50_head_atom *asyh)
{
	struct nouveau_framebuffer *fb = nouveau_framebuffer(asyw->state.fb);
	struct nouveau_drm *drm = nouveau_drm(wndw->plane.dev);
	int ret;

	NV_ATOMIC(drm, "%s acquire\n", wndw->plane.name);

	if (asyw->state.fb != armw->state.fb || !armw->visible || modeset) {
		asyw->image.w = fb->base.width;
		asyw->image.h = fb->base.height;
		asyw->image.kind = fb->nvbo->kind;

		ret = nv50_wndw_atomic_check_acquire_rgb(asyw);
		if (ret) {
			ret = nv50_wndw_atomic_check_acquire_yuv(asyw);
			if (ret)
				return ret;
		}

		if (asyw->image.kind) {
			asyw->image.layout = 0;
			if (drm->client.device.info.chipset >= 0xc0)
				asyw->image.blockh = fb->nvbo->mode >> 4;
			else
				asyw->image.blockh = fb->nvbo->mode;
			asyw->image.blocks[0] = fb->base.pitches[0] / 64;
			asyw->image.pitch[0] = 0;
		} else {
			asyw->image.layout = 1;
			asyw->image.blockh = 0;
			asyw->image.blocks[0] = 0;
			asyw->image.pitch[0] = fb->base.pitches[0];
		}

		if (!(asyh->state.pageflip_flags & DRM_MODE_PAGE_FLIP_ASYNC))
			asyw->image.interval = 1;
		else
			asyw->image.interval = 0;
		asyw->image.mode = asyw->image.interval ? 0 : 1;
		asyw->set.image = wndw->func->image_set != NULL;
	}

	if (wndw->func->scale_set) {
		asyw->scale.sx = asyw->state.src_x >> 16;
		asyw->scale.sy = asyw->state.src_y >> 16;
		asyw->scale.sw = asyw->state.src_w >> 16;
		asyw->scale.sh = asyw->state.src_h >> 16;
		asyw->scale.dw = asyw->state.crtc_w;
		asyw->scale.dh = asyw->state.crtc_h;
		if (memcmp(&armw->scale, &asyw->scale, sizeof(asyw->scale)))
			asyw->set.scale = true;
	}

	if (wndw->immd) {
		asyw->point.x = asyw->state.crtc_x;
		asyw->point.y = asyw->state.crtc_y;
		if (memcmp(&armw->point, &asyw->point, sizeof(asyw->point)))
			asyw->set.point = true;
	}

	return wndw->func->acquire(wndw, asyw, asyh);
}

static void
nv50_wndw_atomic_check_lut(struct nv50_wndw *wndw,
			   struct nv50_wndw_atom *armw,
			   struct nv50_wndw_atom *asyw,
			   struct nv50_head_atom *asyh)
{
	struct drm_property_blob *ilut = asyh->state.degamma_lut;

	/* I8 format without an input LUT makes no sense, and the
	 * HW error-checks for this.
	 *
	 * In order to handle legacy gamma, when there's no input
	 * LUT we need to steal the output LUT and use it instead.
	 */
	if (!ilut && asyw->state.fb->format->format == DRM_FORMAT_C8) {
		/* This should be an error, but there's legacy clients
		 * that do a modeset before providing a gamma table.
		 *
		 * We keep the window disabled to avoid angering HW.
		 */
		if (!(ilut = asyh->state.gamma_lut)) {
			asyw->visible = false;
			return;
		}

		if (wndw->func->ilut)
			asyh->wndw.olut |= BIT(wndw->id);
	} else {
		asyh->wndw.olut &= ~BIT(wndw->id);
	}

	/* Recalculate LUT state. */
	memset(&asyw->xlut, 0x00, sizeof(asyw->xlut));
	if ((asyw->ilut = wndw->func->ilut ? ilut : NULL)) {
		wndw->func->ilut(wndw, asyw);
		asyw->xlut.handle = wndw->wndw.vram.handle;
		asyw->xlut.i.buffer = !asyw->xlut.i.buffer;
		asyw->set.xlut = true;
	}

	/* Handle setting base SET_OUTPUT_LUT_LO_ENABLE_USE_CORE_LUT. */
	if (wndw->func->olut_core &&
	    (!armw->visible || (armw->xlut.handle && !asyw->xlut.handle)))
		asyw->set.xlut = true;

	/* Can't do an immediate flip while changing the LUT. */
	asyh->state.pageflip_flags &= ~DRM_MODE_PAGE_FLIP_ASYNC;
}

static int
nv50_wndw_atomic_check(struct drm_plane *plane, struct drm_plane_state *state)
{
	struct nouveau_drm *drm = nouveau_drm(plane->dev);
	struct nv50_wndw *wndw = nv50_wndw(plane);
	struct nv50_wndw_atom *armw = nv50_wndw_atom(wndw->plane.state);
	struct nv50_wndw_atom *asyw = nv50_wndw_atom(state);
	struct nv50_head_atom *harm = NULL, *asyh = NULL;
	bool modeset = false;
	int ret;

	NV_ATOMIC(drm, "%s atomic_check\n", plane->name);

	/* Fetch the assembly state for the head the window will belong to,
	 * and determine whether the window will be visible.
	 */
	if (asyw->state.crtc) {
		asyh = nv50_head_atom_get(asyw->state.state, asyw->state.crtc);
		if (IS_ERR(asyh))
			return PTR_ERR(asyh);
		modeset = drm_atomic_crtc_needs_modeset(&asyh->state);
		asyw->visible = asyh->state.active;
	} else {
		asyw->visible = false;
	}

	/* Fetch assembly state for the head the window used to belong to. */
	if (armw->state.crtc) {
		harm = nv50_head_atom_get(asyw->state.state, armw->state.crtc);
		if (IS_ERR(harm))
			return PTR_ERR(harm);
	}

	/* LUT configuration can potentially cause the window to be disabled. */
	if (asyw->visible && wndw->func->xlut_set &&
	    (!armw->visible ||
	     asyh->state.color_mgmt_changed ||
	     asyw->state.fb->format->format !=
	     armw->state.fb->format->format))
		nv50_wndw_atomic_check_lut(wndw, armw, asyw, asyh);

	/* Calculate new window state. */
	if (asyw->visible) {
		ret = nv50_wndw_atomic_check_acquire(wndw, modeset,
						     armw, asyw, asyh);
		if (ret)
			return ret;

		asyh->wndw.mask |= BIT(wndw->id);
	} else
	if (armw->visible) {
		nv50_wndw_atomic_check_release(wndw, asyw, harm);
		harm->wndw.mask &= ~BIT(wndw->id);
	} else {
		return 0;
	}

	/* Aside from the obvious case where the window is actively being
	 * disabled, we might also need to temporarily disable the window
	 * when performing certain modeset operations.
	 */
	if (!asyw->visible || modeset) {
		asyw->clr.ntfy = armw->ntfy.handle != 0;
		asyw->clr.sema = armw->sema.handle != 0;
		asyw->clr.xlut = armw->xlut.handle != 0;
		if (wndw->func->image_clr)
			asyw->clr.image = armw->image.handle[0] != 0;
	}

	return 0;
}

static void
nv50_wndw_cleanup_fb(struct drm_plane *plane, struct drm_plane_state *old_state)
{
	struct nouveau_framebuffer *fb = nouveau_framebuffer(old_state->fb);
	struct nouveau_drm *drm = nouveau_drm(plane->dev);

	NV_ATOMIC(drm, "%s cleanup: %p\n", plane->name, old_state->fb);
	if (!old_state->fb)
		return;

	nouveau_bo_unpin(fb->nvbo);
}

static int
nv50_wndw_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state)
{
	struct nouveau_framebuffer *fb = nouveau_framebuffer(state->fb);
	struct nouveau_drm *drm = nouveau_drm(plane->dev);
	struct nv50_wndw *wndw = nv50_wndw(plane);
	struct nv50_wndw_atom *asyw = nv50_wndw_atom(state);
	struct nv50_head_atom *asyh;
	struct nv50_wndw_ctxdma *ctxdma;
	int ret;

	NV_ATOMIC(drm, "%s prepare: %p\n", plane->name, state->fb);
	if (!asyw->state.fb)
		return 0;

	ret = nouveau_bo_pin(fb->nvbo, TTM_PL_FLAG_VRAM, true);
	if (ret)
		return ret;

	if (wndw->ctxdma.parent) {
		ctxdma = nv50_wndw_ctxdma_new(wndw, fb);
		if (IS_ERR(ctxdma)) {
			nouveau_bo_unpin(fb->nvbo);
			return PTR_ERR(ctxdma);
		}

		asyw->image.handle[0] = ctxdma->object.handle;
	}

	asyw->state.fence = reservation_object_get_excl_rcu(fb->nvbo->bo.resv);
	asyw->image.offset[0] = fb->nvbo->bo.offset;

	if (wndw->func->prepare) {
		asyh = nv50_head_atom_get(asyw->state.state, asyw->state.crtc);
		if (IS_ERR(asyh))
			return PTR_ERR(asyh);

		wndw->func->prepare(wndw, asyh, asyw);
	}

	return 0;
}

static const struct drm_plane_helper_funcs
nv50_wndw_helper = {
	.prepare_fb = nv50_wndw_prepare_fb,
	.cleanup_fb = nv50_wndw_cleanup_fb,
	.atomic_check = nv50_wndw_atomic_check,
};

static void
nv50_wndw_atomic_destroy_state(struct drm_plane *plane,
			       struct drm_plane_state *state)
{
	struct nv50_wndw_atom *asyw = nv50_wndw_atom(state);
	__drm_atomic_helper_plane_destroy_state(&asyw->state);
	kfree(asyw);
}

static struct drm_plane_state *
nv50_wndw_atomic_duplicate_state(struct drm_plane *plane)
{
	struct nv50_wndw_atom *armw = nv50_wndw_atom(plane->state);
	struct nv50_wndw_atom *asyw;
	if (!(asyw = kmalloc(sizeof(*asyw), GFP_KERNEL)))
		return NULL;
	__drm_atomic_helper_plane_duplicate_state(plane, &asyw->state);
	asyw->sema = armw->sema;
	asyw->ntfy = armw->ntfy;
	asyw->ilut = NULL;
	asyw->xlut = armw->xlut;
	asyw->image = armw->image;
	asyw->point = armw->point;
	asyw->clr.mask = 0;
	asyw->set.mask = 0;
	return &asyw->state;
}

static void
nv50_wndw_reset(struct drm_plane *plane)
{
	struct nv50_wndw_atom *asyw;

	if (WARN_ON(!(asyw = kzalloc(sizeof(*asyw), GFP_KERNEL))))
		return;

	if (plane->state)
		plane->funcs->atomic_destroy_state(plane, plane->state);
	plane->state = &asyw->state;
	plane->state->plane = plane;
	plane->state->rotation = DRM_MODE_ROTATE_0;
}

static void
nv50_wndw_destroy(struct drm_plane *plane)
{
	struct nv50_wndw *wndw = nv50_wndw(plane);
	struct nv50_wndw_ctxdma *ctxdma, *ctxtmp;

	list_for_each_entry_safe(ctxdma, ctxtmp, &wndw->ctxdma.list, head) {
		nv50_wndw_ctxdma_del(ctxdma);
	}

	nvif_notify_fini(&wndw->notify);
	nv50_dmac_destroy(&wndw->wimm);
	nv50_dmac_destroy(&wndw->wndw);

	nv50_lut_fini(&wndw->ilut);

	drm_plane_cleanup(&wndw->plane);
	kfree(wndw);
}

const struct drm_plane_funcs
nv50_wndw = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.destroy = nv50_wndw_destroy,
	.reset = nv50_wndw_reset,
	.atomic_duplicate_state = nv50_wndw_atomic_duplicate_state,
	.atomic_destroy_state = nv50_wndw_atomic_destroy_state,
};

static int
nv50_wndw_notify(struct nvif_notify *notify)
{
	return NVIF_NOTIFY_KEEP;
}

void
nv50_wndw_fini(struct nv50_wndw *wndw)
{
	nvif_notify_put(&wndw->notify);
}

void
nv50_wndw_init(struct nv50_wndw *wndw)
{
	nvif_notify_get(&wndw->notify);
}

int
nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
	       enum drm_plane_type type, const char *name, int index,
	       const u32 *format, u32 heads,
	       enum nv50_disp_interlock_type interlock_type, u32 interlock_data,
	       struct nv50_wndw **pwndw)
{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nvif_mmu *mmu = &drm->client.mmu;
	struct nv50_disp *disp = nv50_disp(dev);
	struct nv50_wndw *wndw;
	int nformat;
	int ret;

	if (!(wndw = *pwndw = kzalloc(sizeof(*wndw), GFP_KERNEL)))
		return -ENOMEM;
	wndw->func = func;
	wndw->id = index;
	wndw->interlock.type = interlock_type;
	wndw->interlock.data = interlock_data;
	wndw->ctxdma.parent = &wndw->wndw.base.user;

	wndw->ctxdma.parent = &wndw->wndw.base.user;
	INIT_LIST_HEAD(&wndw->ctxdma.list);

	for (nformat = 0; format[nformat]; nformat++);

	ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw,
				       format, nformat, NULL,
				       type, "%s-%d", name, index);
	if (ret) {
		kfree(*pwndw);
		*pwndw = NULL;
		return ret;
	}

	drm_plane_helper_add(&wndw->plane, &nv50_wndw_helper);

	if (wndw->func->ilut) {
		ret = nv50_lut_init(disp, mmu, &wndw->ilut);
		if (ret)
			return ret;
	}

	wndw->notify.func = nv50_wndw_notify;
	return 0;
}

int
nv50_wndw_new(struct nouveau_drm *drm, enum drm_plane_type type, int index,
	      struct nv50_wndw **pwndw)
{
	struct {
		s32 oclass;
		int version;
		int (*new)(struct nouveau_drm *, enum drm_plane_type,
			   int, s32, struct nv50_wndw **);
	} wndws[] = {
		{ GV100_DISP_WINDOW_CHANNEL_DMA, 0, wndwc37e_new },
		{}
	};
	struct nv50_disp *disp = nv50_disp(drm->dev);
	int cid, ret;

	cid = nvif_mclass(&disp->disp->object, wndws);
	if (cid < 0) {
		NV_ERROR(drm, "No supported window class\n");
		return cid;
	}

	ret = wndws[cid].new(drm, type, index, wndws[cid].oclass, pwndw);
	if (ret)
		return ret;

	return nv50_wimm_init(drm, *pwndw);
}