1 /*
2  * Copyright 2018 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  */
22 #include "wndw.h"
23 #include "wimm.h"
24 
25 #include <nvif/class.h>
26 #include <nvif/cl0002.h>
27 
28 #include <drm/drm_atomic_helper.h>
29 #include <drm/drm_fourcc.h>
30 
31 #include "nouveau_bo.h"
32 
33 static void
34 nv50_wndw_ctxdma_del(struct nv50_wndw_ctxdma *ctxdma)
35 {
36 	nvif_object_fini(&ctxdma->object);
37 	list_del(&ctxdma->head);
38 	kfree(ctxdma);
39 }
40 
41 static struct nv50_wndw_ctxdma *
42 nv50_wndw_ctxdma_new(struct nv50_wndw *wndw, struct nouveau_framebuffer *fb)
43 {
44 	struct nouveau_drm *drm = nouveau_drm(fb->base.dev);
45 	struct nv50_wndw_ctxdma *ctxdma;
46 	const u8    kind = fb->nvbo->kind;
47 	const u32 handle = 0xfb000000 | kind;
48 	struct {
49 		struct nv_dma_v0 base;
50 		union {
51 			struct nv50_dma_v0 nv50;
52 			struct gf100_dma_v0 gf100;
53 			struct gf119_dma_v0 gf119;
54 		};
55 	} args = {};
56 	u32 argc = sizeof(args.base);
57 	int ret;
58 
59 	list_for_each_entry(ctxdma, &wndw->ctxdma.list, head) {
60 		if (ctxdma->object.handle == handle)
61 			return ctxdma;
62 	}
63 
64 	if (!(ctxdma = kzalloc(sizeof(*ctxdma), GFP_KERNEL)))
65 		return ERR_PTR(-ENOMEM);
66 	list_add(&ctxdma->head, &wndw->ctxdma.list);
67 
68 	args.base.target = NV_DMA_V0_TARGET_VRAM;
69 	args.base.access = NV_DMA_V0_ACCESS_RDWR;
70 	args.base.start  = 0;
71 	args.base.limit  = drm->client.device.info.ram_user - 1;
72 
73 	if (drm->client.device.info.chipset < 0x80) {
74 		args.nv50.part = NV50_DMA_V0_PART_256;
75 		argc += sizeof(args.nv50);
76 	} else
77 	if (drm->client.device.info.chipset < 0xc0) {
78 		args.nv50.part = NV50_DMA_V0_PART_256;
79 		args.nv50.kind = kind;
80 		argc += sizeof(args.nv50);
81 	} else
82 	if (drm->client.device.info.chipset < 0xd0) {
83 		args.gf100.kind = kind;
84 		argc += sizeof(args.gf100);
85 	} else {
86 		args.gf119.page = GF119_DMA_V0_PAGE_LP;
87 		args.gf119.kind = kind;
88 		argc += sizeof(args.gf119);
89 	}
90 
91 	ret = nvif_object_init(wndw->ctxdma.parent, handle, NV_DMA_IN_MEMORY,
92 			       &args, argc, &ctxdma->object);
93 	if (ret) {
94 		nv50_wndw_ctxdma_del(ctxdma);
95 		return ERR_PTR(ret);
96 	}
97 
98 	return ctxdma;
99 }
100 
101 int
102 nv50_wndw_wait_armed(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
103 {
104 	struct nv50_disp *disp = nv50_disp(wndw->plane.dev);
105 	if (asyw->set.ntfy) {
106 		return wndw->func->ntfy_wait_begun(disp->sync,
107 						   asyw->ntfy.offset,
108 						   wndw->wndw.base.device);
109 	}
110 	return 0;
111 }
112 
113 void
114 nv50_wndw_flush_clr(struct nv50_wndw *wndw, u32 *interlock, bool flush,
115 		    struct nv50_wndw_atom *asyw)
116 {
117 	union nv50_wndw_atom_mask clr = {
118 		.mask = asyw->clr.mask & ~(flush ? 0 : asyw->set.mask),
119 	};
120 	if (clr.sema ) wndw->func-> sema_clr(wndw);
121 	if (clr.ntfy ) wndw->func-> ntfy_clr(wndw);
122 	if (clr.xlut ) wndw->func-> xlut_clr(wndw);
123 	if (clr.csc  ) wndw->func->  csc_clr(wndw);
124 	if (clr.image) wndw->func->image_clr(wndw);
125 
126 	interlock[wndw->interlock.type] |= wndw->interlock.data;
127 }
128 
129 void
130 nv50_wndw_flush_set(struct nv50_wndw *wndw, u32 *interlock,
131 		    struct nv50_wndw_atom *asyw)
132 {
133 	if (interlock[NV50_DISP_INTERLOCK_CORE]) {
134 		asyw->image.mode = 0;
135 		asyw->image.interval = 1;
136 	}
137 
138 	if (asyw->set.sema ) wndw->func->sema_set (wndw, asyw);
139 	if (asyw->set.ntfy ) wndw->func->ntfy_set (wndw, asyw);
140 	if (asyw->set.image) wndw->func->image_set(wndw, asyw);
141 
142 	if (asyw->set.xlut ) {
143 		if (asyw->ilut) {
144 			asyw->xlut.i.offset =
145 				nv50_lut_load(&wndw->ilut, asyw->xlut.i.buffer,
146 					      asyw->ilut, asyw->xlut.i.load);
147 		}
148 		wndw->func->xlut_set(wndw, asyw);
149 	}
150 
151 	if (asyw->set.csc  ) wndw->func->csc_set  (wndw, asyw);
152 	if (asyw->set.scale) wndw->func->scale_set(wndw, asyw);
153 	if (asyw->set.blend) wndw->func->blend_set(wndw, asyw);
154 	if (asyw->set.point) {
155 		if (asyw->set.point = false, asyw->set.mask)
156 			interlock[wndw->interlock.type] |= wndw->interlock.data;
157 		interlock[NV50_DISP_INTERLOCK_WIMM] |= wndw->interlock.wimm;
158 
159 		wndw->immd->point(wndw, asyw);
160 		wndw->immd->update(wndw, interlock);
161 	} else {
162 		interlock[wndw->interlock.type] |= wndw->interlock.data;
163 	}
164 }
165 
166 void
167 nv50_wndw_ntfy_enable(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
168 {
169 	struct nv50_disp *disp = nv50_disp(wndw->plane.dev);
170 
171 	asyw->ntfy.handle = wndw->wndw.sync.handle;
172 	asyw->ntfy.offset = wndw->ntfy;
173 	asyw->ntfy.awaken = false;
174 	asyw->set.ntfy = true;
175 
176 	wndw->func->ntfy_reset(disp->sync, wndw->ntfy);
177 	wndw->ntfy ^= 0x10;
178 }
179 
180 static void
181 nv50_wndw_atomic_check_release(struct nv50_wndw *wndw,
182 			       struct nv50_wndw_atom *asyw,
183 			       struct nv50_head_atom *asyh)
184 {
185 	struct nouveau_drm *drm = nouveau_drm(wndw->plane.dev);
186 	NV_ATOMIC(drm, "%s release\n", wndw->plane.name);
187 	wndw->func->release(wndw, asyw, asyh);
188 	asyw->ntfy.handle = 0;
189 	asyw->sema.handle = 0;
190 }
191 
192 static int
193 nv50_wndw_atomic_check_acquire_yuv(struct nv50_wndw_atom *asyw)
194 {
195 	switch (asyw->state.fb->format->format) {
196 	case DRM_FORMAT_YUYV: asyw->image.format = 0x28; break;
197 	case DRM_FORMAT_UYVY: asyw->image.format = 0x29; break;
198 	default:
199 		WARN_ON(1);
200 		return -EINVAL;
201 	}
202 	asyw->image.colorspace = 1;
203 	return 0;
204 }
205 
206 static int
207 nv50_wndw_atomic_check_acquire_rgb(struct nv50_wndw_atom *asyw)
208 {
209 	switch (asyw->state.fb->format->format) {
210 	case DRM_FORMAT_C8           : asyw->image.format = 0x1e; break;
211 	case DRM_FORMAT_XRGB8888     :
212 	case DRM_FORMAT_ARGB8888     : asyw->image.format = 0xcf; break;
213 	case DRM_FORMAT_RGB565       : asyw->image.format = 0xe8; break;
214 	case DRM_FORMAT_XRGB1555     :
215 	case DRM_FORMAT_ARGB1555     : asyw->image.format = 0xe9; break;
216 	case DRM_FORMAT_XBGR2101010  :
217 	case DRM_FORMAT_ABGR2101010  : asyw->image.format = 0xd1; break;
218 	case DRM_FORMAT_XBGR8888     :
219 	case DRM_FORMAT_ABGR8888     : asyw->image.format = 0xd5; break;
220 	case DRM_FORMAT_XRGB2101010  :
221 	case DRM_FORMAT_ARGB2101010  : asyw->image.format = 0xdf; break;
222 	case DRM_FORMAT_XBGR16161616F:
223 	case DRM_FORMAT_ABGR16161616F: asyw->image.format = 0xca; break;
224 	default:
225 		return -EINVAL;
226 	}
227 	asyw->image.colorspace = 0;
228 	return 0;
229 }
230 
231 static int
232 nv50_wndw_atomic_check_acquire(struct nv50_wndw *wndw, bool modeset,
233 			       struct nv50_wndw_atom *armw,
234 			       struct nv50_wndw_atom *asyw,
235 			       struct nv50_head_atom *asyh)
236 {
237 	struct nouveau_framebuffer *fb = nouveau_framebuffer(asyw->state.fb);
238 	struct nouveau_drm *drm = nouveau_drm(wndw->plane.dev);
239 	int ret;
240 
241 	NV_ATOMIC(drm, "%s acquire\n", wndw->plane.name);
242 
243 	if (asyw->state.fb != armw->state.fb || !armw->visible || modeset) {
244 		asyw->image.w = fb->base.width;
245 		asyw->image.h = fb->base.height;
246 		asyw->image.kind = fb->nvbo->kind;
247 
248 		ret = nv50_wndw_atomic_check_acquire_rgb(asyw);
249 		if (ret) {
250 			ret = nv50_wndw_atomic_check_acquire_yuv(asyw);
251 			if (ret)
252 				return ret;
253 		}
254 
255 		if (asyw->image.kind) {
256 			asyw->image.layout = 0;
257 			if (drm->client.device.info.chipset >= 0xc0)
258 				asyw->image.blockh = fb->nvbo->mode >> 4;
259 			else
260 				asyw->image.blockh = fb->nvbo->mode;
261 			asyw->image.blocks[0] = fb->base.pitches[0] / 64;
262 			asyw->image.pitch[0] = 0;
263 		} else {
264 			asyw->image.layout = 1;
265 			asyw->image.blockh = 0;
266 			asyw->image.blocks[0] = 0;
267 			asyw->image.pitch[0] = fb->base.pitches[0];
268 		}
269 
270 		if (!asyh->state.async_flip)
271 			asyw->image.interval = 1;
272 		else
273 			asyw->image.interval = 0;
274 		asyw->image.mode = asyw->image.interval ? 0 : 1;
275 		asyw->set.image = wndw->func->image_set != NULL;
276 	}
277 
278 	if (wndw->func->scale_set) {
279 		asyw->scale.sx = asyw->state.src_x >> 16;
280 		asyw->scale.sy = asyw->state.src_y >> 16;
281 		asyw->scale.sw = asyw->state.src_w >> 16;
282 		asyw->scale.sh = asyw->state.src_h >> 16;
283 		asyw->scale.dw = asyw->state.crtc_w;
284 		asyw->scale.dh = asyw->state.crtc_h;
285 		if (memcmp(&armw->scale, &asyw->scale, sizeof(asyw->scale)))
286 			asyw->set.scale = true;
287 	}
288 
289 	if (wndw->func->blend_set) {
290 		asyw->blend.depth = 255 - asyw->state.normalized_zpos;
291 		asyw->blend.k1 = asyw->state.alpha >> 8;
292 		switch (asyw->state.pixel_blend_mode) {
293 		case DRM_MODE_BLEND_PREMULTI:
294 			asyw->blend.src_color = 2; /* K1 */
295 			asyw->blend.dst_color = 7; /* NEG_K1_TIMES_SRC */
296 			break;
297 		case DRM_MODE_BLEND_COVERAGE:
298 			asyw->blend.src_color = 5; /* K1_TIMES_SRC */
299 			asyw->blend.dst_color = 7; /* NEG_K1_TIMES_SRC */
300 			break;
301 		case DRM_MODE_BLEND_PIXEL_NONE:
302 		default:
303 			asyw->blend.src_color = 2; /* K1 */
304 			asyw->blend.dst_color = 4; /* NEG_K1 */
305 			break;
306 		}
307 		if (memcmp(&armw->blend, &asyw->blend, sizeof(asyw->blend)))
308 			asyw->set.blend = true;
309 	}
310 
311 	if (wndw->immd) {
312 		asyw->point.x = asyw->state.crtc_x;
313 		asyw->point.y = asyw->state.crtc_y;
314 		if (memcmp(&armw->point, &asyw->point, sizeof(asyw->point)))
315 			asyw->set.point = true;
316 	}
317 
318 	return wndw->func->acquire(wndw, asyw, asyh);
319 }
320 
321 static int
322 nv50_wndw_atomic_check_lut(struct nv50_wndw *wndw,
323 			   struct nv50_wndw_atom *armw,
324 			   struct nv50_wndw_atom *asyw,
325 			   struct nv50_head_atom *asyh)
326 {
327 	struct drm_property_blob *ilut = asyh->state.degamma_lut;
328 
329 	/* I8 format without an input LUT makes no sense, and the
330 	 * HW error-checks for this.
331 	 *
332 	 * In order to handle legacy gamma, when there's no input
333 	 * LUT we need to steal the output LUT and use it instead.
334 	 */
335 	if (!ilut && asyw->state.fb->format->format == DRM_FORMAT_C8) {
336 		/* This should be an error, but there's legacy clients
337 		 * that do a modeset before providing a gamma table.
338 		 *
339 		 * We keep the window disabled to avoid angering HW.
340 		 */
341 		if (!(ilut = asyh->state.gamma_lut)) {
342 			asyw->visible = false;
343 			return 0;
344 		}
345 
346 		if (wndw->func->ilut)
347 			asyh->wndw.olut |= BIT(wndw->id);
348 	} else {
349 		asyh->wndw.olut &= ~BIT(wndw->id);
350 	}
351 
352 	if (!ilut && wndw->func->ilut_identity &&
353 	    asyw->state.fb->format->format != DRM_FORMAT_XBGR16161616F &&
354 	    asyw->state.fb->format->format != DRM_FORMAT_ABGR16161616F) {
355 		static struct drm_property_blob dummy = {};
356 		ilut = &dummy;
357 	}
358 
359 	/* Recalculate LUT state. */
360 	memset(&asyw->xlut, 0x00, sizeof(asyw->xlut));
361 	if ((asyw->ilut = wndw->func->ilut ? ilut : NULL)) {
362 		if (!wndw->func->ilut(wndw, asyw, drm_color_lut_size(ilut))) {
363 			DRM_DEBUG_KMS("Invalid ilut\n");
364 			return -EINVAL;
365 		}
366 		asyw->xlut.handle = wndw->wndw.vram.handle;
367 		asyw->xlut.i.buffer = !asyw->xlut.i.buffer;
368 		asyw->set.xlut = true;
369 	} else {
370 		asyw->clr.xlut = armw->xlut.handle != 0;
371 	}
372 
373 	/* Handle setting base SET_OUTPUT_LUT_LO_ENABLE_USE_CORE_LUT. */
374 	if (wndw->func->olut_core &&
375 	    (!armw->visible || (armw->xlut.handle && !asyw->xlut.handle)))
376 		asyw->set.xlut = true;
377 
378 	if (wndw->func->csc && asyh->state.ctm) {
379 		const struct drm_color_ctm *ctm = asyh->state.ctm->data;
380 		wndw->func->csc(wndw, asyw, ctm);
381 		asyw->csc.valid = true;
382 		asyw->set.csc = true;
383 	} else {
384 		asyw->csc.valid = false;
385 		asyw->clr.csc = armw->csc.valid;
386 	}
387 
388 	/* Can't do an immediate flip while changing the LUT. */
389 	asyh->state.async_flip = false;
390 	return 0;
391 }
392 
393 static int
394 nv50_wndw_atomic_check(struct drm_plane *plane, struct drm_plane_state *state)
395 {
396 	struct nouveau_drm *drm = nouveau_drm(plane->dev);
397 	struct nv50_wndw *wndw = nv50_wndw(plane);
398 	struct nv50_wndw_atom *armw = nv50_wndw_atom(wndw->plane.state);
399 	struct nv50_wndw_atom *asyw = nv50_wndw_atom(state);
400 	struct nv50_head_atom *harm = NULL, *asyh = NULL;
401 	bool modeset = false;
402 	int ret;
403 
404 	NV_ATOMIC(drm, "%s atomic_check\n", plane->name);
405 
406 	/* Fetch the assembly state for the head the window will belong to,
407 	 * and determine whether the window will be visible.
408 	 */
409 	if (asyw->state.crtc) {
410 		asyh = nv50_head_atom_get(asyw->state.state, asyw->state.crtc);
411 		if (IS_ERR(asyh))
412 			return PTR_ERR(asyh);
413 		modeset = drm_atomic_crtc_needs_modeset(&asyh->state);
414 		asyw->visible = asyh->state.active;
415 	} else {
416 		asyw->visible = false;
417 	}
418 
419 	/* Fetch assembly state for the head the window used to belong to. */
420 	if (armw->state.crtc) {
421 		harm = nv50_head_atom_get(asyw->state.state, armw->state.crtc);
422 		if (IS_ERR(harm))
423 			return PTR_ERR(harm);
424 	}
425 
426 	/* LUT configuration can potentially cause the window to be disabled. */
427 	if (asyw->visible && wndw->func->xlut_set &&
428 	    (!armw->visible ||
429 	     asyh->state.color_mgmt_changed ||
430 	     asyw->state.fb->format->format !=
431 	     armw->state.fb->format->format)) {
432 		ret = nv50_wndw_atomic_check_lut(wndw, armw, asyw, asyh);
433 		if (ret)
434 			return ret;
435 	}
436 
437 	/* Calculate new window state. */
438 	if (asyw->visible) {
439 		ret = nv50_wndw_atomic_check_acquire(wndw, modeset,
440 						     armw, asyw, asyh);
441 		if (ret)
442 			return ret;
443 
444 		asyh->wndw.mask |= BIT(wndw->id);
445 	} else
446 	if (armw->visible) {
447 		nv50_wndw_atomic_check_release(wndw, asyw, harm);
448 		harm->wndw.mask &= ~BIT(wndw->id);
449 	} else {
450 		return 0;
451 	}
452 
453 	/* Aside from the obvious case where the window is actively being
454 	 * disabled, we might also need to temporarily disable the window
455 	 * when performing certain modeset operations.
456 	 */
457 	if (!asyw->visible || modeset) {
458 		asyw->clr.ntfy = armw->ntfy.handle != 0;
459 		asyw->clr.sema = armw->sema.handle != 0;
460 		asyw->clr.xlut = armw->xlut.handle != 0;
461 		if (asyw->clr.xlut && asyw->visible)
462 			asyw->set.xlut = asyw->xlut.handle != 0;
463 		asyw->clr.csc  = armw->csc.valid;
464 		if (wndw->func->image_clr)
465 			asyw->clr.image = armw->image.handle[0] != 0;
466 	}
467 
468 	return 0;
469 }
470 
471 static void
472 nv50_wndw_cleanup_fb(struct drm_plane *plane, struct drm_plane_state *old_state)
473 {
474 	struct nouveau_framebuffer *fb = nouveau_framebuffer(old_state->fb);
475 	struct nouveau_drm *drm = nouveau_drm(plane->dev);
476 
477 	NV_ATOMIC(drm, "%s cleanup: %p\n", plane->name, old_state->fb);
478 	if (!old_state->fb)
479 		return;
480 
481 	nouveau_bo_unpin(fb->nvbo);
482 }
483 
484 static int
485 nv50_wndw_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state)
486 {
487 	struct nouveau_framebuffer *fb = nouveau_framebuffer(state->fb);
488 	struct nouveau_drm *drm = nouveau_drm(plane->dev);
489 	struct nv50_wndw *wndw = nv50_wndw(plane);
490 	struct nv50_wndw_atom *asyw = nv50_wndw_atom(state);
491 	struct nv50_head_atom *asyh;
492 	struct nv50_wndw_ctxdma *ctxdma;
493 	int ret;
494 
495 	NV_ATOMIC(drm, "%s prepare: %p\n", plane->name, state->fb);
496 	if (!asyw->state.fb)
497 		return 0;
498 
499 	ret = nouveau_bo_pin(fb->nvbo, TTM_PL_FLAG_VRAM, true);
500 	if (ret)
501 		return ret;
502 
503 	if (wndw->ctxdma.parent) {
504 		ctxdma = nv50_wndw_ctxdma_new(wndw, fb);
505 		if (IS_ERR(ctxdma)) {
506 			nouveau_bo_unpin(fb->nvbo);
507 			return PTR_ERR(ctxdma);
508 		}
509 
510 		asyw->image.handle[0] = ctxdma->object.handle;
511 	}
512 
513 	asyw->state.fence = dma_resv_get_excl_rcu(fb->nvbo->bo.base.resv);
514 	asyw->image.offset[0] = fb->nvbo->offset;
515 
516 	if (wndw->func->prepare) {
517 		asyh = nv50_head_atom_get(asyw->state.state, asyw->state.crtc);
518 		if (IS_ERR(asyh))
519 			return PTR_ERR(asyh);
520 
521 		wndw->func->prepare(wndw, asyh, asyw);
522 	}
523 
524 	return 0;
525 }
526 
527 static const struct drm_plane_helper_funcs
528 nv50_wndw_helper = {
529 	.prepare_fb = nv50_wndw_prepare_fb,
530 	.cleanup_fb = nv50_wndw_cleanup_fb,
531 	.atomic_check = nv50_wndw_atomic_check,
532 };
533 
534 static void
535 nv50_wndw_atomic_destroy_state(struct drm_plane *plane,
536 			       struct drm_plane_state *state)
537 {
538 	struct nv50_wndw_atom *asyw = nv50_wndw_atom(state);
539 	__drm_atomic_helper_plane_destroy_state(&asyw->state);
540 	kfree(asyw);
541 }
542 
543 static struct drm_plane_state *
544 nv50_wndw_atomic_duplicate_state(struct drm_plane *plane)
545 {
546 	struct nv50_wndw_atom *armw = nv50_wndw_atom(plane->state);
547 	struct nv50_wndw_atom *asyw;
548 	if (!(asyw = kmalloc(sizeof(*asyw), GFP_KERNEL)))
549 		return NULL;
550 	__drm_atomic_helper_plane_duplicate_state(plane, &asyw->state);
551 	asyw->sema = armw->sema;
552 	asyw->ntfy = armw->ntfy;
553 	asyw->ilut = NULL;
554 	asyw->xlut = armw->xlut;
555 	asyw->csc  = armw->csc;
556 	asyw->image = armw->image;
557 	asyw->point = armw->point;
558 	asyw->clr.mask = 0;
559 	asyw->set.mask = 0;
560 	return &asyw->state;
561 }
562 
563 static int
564 nv50_wndw_zpos_default(struct drm_plane *plane)
565 {
566 	return (plane->type == DRM_PLANE_TYPE_PRIMARY) ? 0 :
567 	       (plane->type == DRM_PLANE_TYPE_OVERLAY) ? 1 : 255;
568 }
569 
570 static void
571 nv50_wndw_reset(struct drm_plane *plane)
572 {
573 	struct nv50_wndw_atom *asyw;
574 
575 	if (WARN_ON(!(asyw = kzalloc(sizeof(*asyw), GFP_KERNEL))))
576 		return;
577 
578 	if (plane->state)
579 		plane->funcs->atomic_destroy_state(plane, plane->state);
580 
581 	__drm_atomic_helper_plane_reset(plane, &asyw->state);
582 	plane->state->zpos = nv50_wndw_zpos_default(plane);
583 	plane->state->normalized_zpos = nv50_wndw_zpos_default(plane);
584 }
585 
586 static void
587 nv50_wndw_destroy(struct drm_plane *plane)
588 {
589 	struct nv50_wndw *wndw = nv50_wndw(plane);
590 	struct nv50_wndw_ctxdma *ctxdma, *ctxtmp;
591 
592 	list_for_each_entry_safe(ctxdma, ctxtmp, &wndw->ctxdma.list, head) {
593 		nv50_wndw_ctxdma_del(ctxdma);
594 	}
595 
596 	nvif_notify_fini(&wndw->notify);
597 	nv50_dmac_destroy(&wndw->wimm);
598 	nv50_dmac_destroy(&wndw->wndw);
599 
600 	nv50_lut_fini(&wndw->ilut);
601 
602 	drm_plane_cleanup(&wndw->plane);
603 	kfree(wndw);
604 }
605 
606 const struct drm_plane_funcs
607 nv50_wndw = {
608 	.update_plane = drm_atomic_helper_update_plane,
609 	.disable_plane = drm_atomic_helper_disable_plane,
610 	.destroy = nv50_wndw_destroy,
611 	.reset = nv50_wndw_reset,
612 	.atomic_duplicate_state = nv50_wndw_atomic_duplicate_state,
613 	.atomic_destroy_state = nv50_wndw_atomic_destroy_state,
614 };
615 
616 static int
617 nv50_wndw_notify(struct nvif_notify *notify)
618 {
619 	return NVIF_NOTIFY_KEEP;
620 }
621 
622 void
623 nv50_wndw_fini(struct nv50_wndw *wndw)
624 {
625 	nvif_notify_put(&wndw->notify);
626 }
627 
628 void
629 nv50_wndw_init(struct nv50_wndw *wndw)
630 {
631 	nvif_notify_get(&wndw->notify);
632 }
633 
634 int
635 nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
636 	       enum drm_plane_type type, const char *name, int index,
637 	       const u32 *format, u32 heads,
638 	       enum nv50_disp_interlock_type interlock_type, u32 interlock_data,
639 	       struct nv50_wndw **pwndw)
640 {
641 	struct nouveau_drm *drm = nouveau_drm(dev);
642 	struct nvif_mmu *mmu = &drm->client.mmu;
643 	struct nv50_disp *disp = nv50_disp(dev);
644 	struct nv50_wndw *wndw;
645 	int nformat;
646 	int ret;
647 
648 	if (!(wndw = *pwndw = kzalloc(sizeof(*wndw), GFP_KERNEL)))
649 		return -ENOMEM;
650 	wndw->func = func;
651 	wndw->id = index;
652 	wndw->interlock.type = interlock_type;
653 	wndw->interlock.data = interlock_data;
654 
655 	wndw->ctxdma.parent = &wndw->wndw.base.user;
656 	INIT_LIST_HEAD(&wndw->ctxdma.list);
657 
658 	for (nformat = 0; format[nformat]; nformat++);
659 
660 	ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw,
661 				       format, nformat, NULL,
662 				       type, "%s-%d", name, index);
663 	if (ret) {
664 		kfree(*pwndw);
665 		*pwndw = NULL;
666 		return ret;
667 	}
668 
669 	drm_plane_helper_add(&wndw->plane, &nv50_wndw_helper);
670 
671 	if (wndw->func->ilut) {
672 		ret = nv50_lut_init(disp, mmu, &wndw->ilut);
673 		if (ret)
674 			return ret;
675 	}
676 
677 	wndw->notify.func = nv50_wndw_notify;
678 
679 	if (wndw->func->blend_set) {
680 		ret = drm_plane_create_zpos_property(&wndw->plane,
681 				nv50_wndw_zpos_default(&wndw->plane), 0, 254);
682 		if (ret)
683 			return ret;
684 
685 		ret = drm_plane_create_alpha_property(&wndw->plane);
686 		if (ret)
687 			return ret;
688 
689 		ret = drm_plane_create_blend_mode_property(&wndw->plane,
690 				BIT(DRM_MODE_BLEND_PIXEL_NONE) |
691 				BIT(DRM_MODE_BLEND_PREMULTI) |
692 				BIT(DRM_MODE_BLEND_COVERAGE));
693 		if (ret)
694 			return ret;
695 	} else {
696 		ret = drm_plane_create_zpos_immutable_property(&wndw->plane,
697 				nv50_wndw_zpos_default(&wndw->plane));
698 		if (ret)
699 			return ret;
700 	}
701 
702 	return 0;
703 }
704 
705 int
706 nv50_wndw_new(struct nouveau_drm *drm, enum drm_plane_type type, int index,
707 	      struct nv50_wndw **pwndw)
708 {
709 	struct {
710 		s32 oclass;
711 		int version;
712 		int (*new)(struct nouveau_drm *, enum drm_plane_type,
713 			   int, s32, struct nv50_wndw **);
714 	} wndws[] = {
715 		{ TU102_DISP_WINDOW_CHANNEL_DMA, 0, wndwc57e_new },
716 		{ GV100_DISP_WINDOW_CHANNEL_DMA, 0, wndwc37e_new },
717 		{}
718 	};
719 	struct nv50_disp *disp = nv50_disp(drm->dev);
720 	int cid, ret;
721 
722 	cid = nvif_mclass(&disp->disp->object, wndws);
723 	if (cid < 0) {
724 		NV_ERROR(drm, "No supported window class\n");
725 		return cid;
726 	}
727 
728 	ret = wndws[cid].new(drm, type, index, wndws[cid].oclass, pwndw);
729 	if (ret)
730 		return ret;
731 
732 	return nv50_wimm_init(drm, *pwndw);
733 }
734