xref: /linux/drivers/gpu/drm/nouveau/nouveau_display.c (revision 8e1bb4a41aa78d6105e59186af3dcd545fc66e70)
1 /*
2  * Copyright (C) 2008 Maarten Maathuis.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial
15  * portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  */
26 
27 #include <acpi/video.h>
28 
29 #include <drm/drm_atomic.h>
30 #include <drm/drm_atomic_helper.h>
31 #include <drm/drm_crtc_helper.h>
32 #include <drm/drm_fb_helper.h>
33 #include <drm/drm_fourcc.h>
34 #include <drm/drm_gem_framebuffer_helper.h>
35 #include <drm/drm_probe_helper.h>
36 #include <drm/drm_vblank.h>
37 
38 #include "nouveau_crtc.h"
39 #include "nouveau_gem.h"
40 #include "nouveau_connector.h"
41 #include "nv50_display.h"
42 
43 #include <nvif/class.h>
44 #include <nvif/if0011.h>
45 #include <nvif/if0013.h>
46 #include <dispnv50/crc.h>
47 
48 int
49 nouveau_display_vblank_enable(struct drm_crtc *crtc)
50 {
51 	struct nouveau_crtc *nv_crtc;
52 
53 	nv_crtc = nouveau_crtc(crtc);
54 	nvif_event_allow(&nv_crtc->vblank);
55 
56 	return 0;
57 }
58 
59 void
60 nouveau_display_vblank_disable(struct drm_crtc *crtc)
61 {
62 	struct nouveau_crtc *nv_crtc;
63 
64 	nv_crtc = nouveau_crtc(crtc);
65 	nvif_event_block(&nv_crtc->vblank);
66 }
67 
68 static inline int
69 calc(int blanks, int blanke, int total, int line)
70 {
71 	if (blanke >= blanks) {
72 		if (line >= blanks)
73 			line -= total;
74 	} else {
75 		if (line >= blanks)
76 			line -= total;
77 		line -= blanke + 1;
78 	}
79 	return line;
80 }
81 
82 static bool
83 nouveau_display_scanoutpos_head(struct drm_crtc *crtc, int *vpos, int *hpos,
84 				ktime_t *stime, ktime_t *etime)
85 {
86 	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
87 	struct nvif_head *head = &nouveau_crtc(crtc)->head;
88 	struct nvif_head_scanoutpos_v0 args;
89 	int retry = 20;
90 	bool ret = false;
91 
92 	args.version = 0;
93 
94 	do {
95 		ret = nvif_mthd(&head->object, NVIF_HEAD_V0_SCANOUTPOS, &args, sizeof(args));
96 		if (ret != 0)
97 			return false;
98 
99 		if (args.vline) {
100 			ret = true;
101 			break;
102 		}
103 
104 		if (retry) ndelay(vblank->linedur_ns);
105 	} while (retry--);
106 
107 	*hpos = args.hline;
108 	*vpos = calc(args.vblanks, args.vblanke, args.vtotal, args.vline);
109 	if (stime) *stime = ns_to_ktime(args.time[0]);
110 	if (etime) *etime = ns_to_ktime(args.time[1]);
111 
112 	return ret;
113 }
114 
115 bool
116 nouveau_display_scanoutpos(struct drm_crtc *crtc,
117 			   bool in_vblank_irq, int *vpos, int *hpos,
118 			   ktime_t *stime, ktime_t *etime,
119 			   const struct drm_display_mode *mode)
120 {
121 	return nouveau_display_scanoutpos_head(crtc, vpos, hpos,
122 					       stime, etime);
123 }
124 
125 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
126 	.destroy = drm_gem_fb_destroy,
127 	.create_handle = drm_gem_fb_create_handle,
128 };
129 
130 static void
131 nouveau_decode_mod(struct nouveau_drm *drm,
132 		   uint64_t modifier,
133 		   uint32_t *tile_mode,
134 		   uint8_t *kind)
135 {
136 	struct nouveau_display *disp = nouveau_display(drm->dev);
137 	BUG_ON(!tile_mode || !kind);
138 
139 	if (modifier == DRM_FORMAT_MOD_LINEAR) {
140 		/* tile_mode will not be used in this case */
141 		*tile_mode = 0;
142 		*kind = 0;
143 	} else {
144 		/*
145 		 * Extract the block height and kind from the corresponding
146 		 * modifier fields.  See drm_fourcc.h for details.
147 		 */
148 
149 		if ((modifier & (0xffull << 12)) == 0ull) {
150 			/* Legacy modifier.  Translate to this dev's 'kind.' */
151 			modifier |= disp->format_modifiers[0] & (0xffull << 12);
152 		}
153 
154 		*tile_mode = (uint32_t)(modifier & 0xF);
155 		*kind = (uint8_t)((modifier >> 12) & 0xFF);
156 
157 		if (drm->client.device.info.chipset >= 0xc0)
158 			*tile_mode <<= 4;
159 	}
160 }
161 
162 void
163 nouveau_framebuffer_get_layout(struct drm_framebuffer *fb,
164 			       uint32_t *tile_mode,
165 			       uint8_t *kind)
166 {
167 	if (fb->flags & DRM_MODE_FB_MODIFIERS) {
168 		struct nouveau_drm *drm = nouveau_drm(fb->dev);
169 
170 		nouveau_decode_mod(drm, fb->modifier, tile_mode, kind);
171 	} else {
172 		const struct nouveau_bo *nvbo = nouveau_gem_object(fb->obj[0]);
173 
174 		*tile_mode = nvbo->mode;
175 		*kind = nvbo->kind;
176 	}
177 }
178 
179 static const u64 legacy_modifiers[] = {
180 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
181 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
182 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
183 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3),
184 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4),
185 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5),
186 	DRM_FORMAT_MOD_INVALID
187 };
188 
189 static int
190 nouveau_validate_decode_mod(struct nouveau_drm *drm,
191 			    uint64_t modifier,
192 			    uint32_t *tile_mode,
193 			    uint8_t *kind)
194 {
195 	struct nouveau_display *disp = nouveau_display(drm->dev);
196 	int mod;
197 
198 	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
199 		return -EINVAL;
200 	}
201 
202 	BUG_ON(!disp->format_modifiers);
203 
204 	for (mod = 0;
205 	     (disp->format_modifiers[mod] != DRM_FORMAT_MOD_INVALID) &&
206 	     (disp->format_modifiers[mod] != modifier);
207 	     mod++);
208 
209 	if (disp->format_modifiers[mod] == DRM_FORMAT_MOD_INVALID) {
210 		for (mod = 0;
211 		     (legacy_modifiers[mod] != DRM_FORMAT_MOD_INVALID) &&
212 		     (legacy_modifiers[mod] != modifier);
213 		     mod++);
214 		if (legacy_modifiers[mod] == DRM_FORMAT_MOD_INVALID)
215 			return -EINVAL;
216 	}
217 
218 	nouveau_decode_mod(drm, modifier, tile_mode, kind);
219 
220 	return 0;
221 }
222 
223 static inline uint32_t
224 nouveau_get_width_in_blocks(uint32_t stride)
225 {
226 	/* GOBs per block in the x direction is always one, and GOBs are
227 	 * 64 bytes wide
228 	 */
229 	static const uint32_t log_block_width = 6;
230 
231 	return (stride + (1 << log_block_width) - 1) >> log_block_width;
232 }
233 
234 static inline uint32_t
235 nouveau_get_height_in_blocks(struct nouveau_drm *drm,
236 			     uint32_t height,
237 			     uint32_t log_block_height_in_gobs)
238 {
239 	uint32_t log_gob_height;
240 	uint32_t log_block_height;
241 
242 	BUG_ON(drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA);
243 
244 	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_FERMI)
245 		log_gob_height = 2;
246 	else
247 		log_gob_height = 3;
248 
249 	log_block_height = log_block_height_in_gobs + log_gob_height;
250 
251 	return (height + (1 << log_block_height) - 1) >> log_block_height;
252 }
253 
254 static int
255 nouveau_check_bl_size(struct nouveau_drm *drm, struct nouveau_bo *nvbo,
256 		      uint32_t offset, uint32_t stride, uint32_t h,
257 		      uint32_t tile_mode)
258 {
259 	uint32_t gob_size, bw, bh;
260 	uint64_t bl_size;
261 
262 	BUG_ON(drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA);
263 
264 	if (drm->client.device.info.chipset >= 0xc0) {
265 		if (tile_mode & 0xF)
266 			return -EINVAL;
267 		tile_mode >>= 4;
268 	}
269 
270 	if (tile_mode & 0xFFFFFFF0)
271 		return -EINVAL;
272 
273 	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_FERMI)
274 		gob_size = 256;
275 	else
276 		gob_size = 512;
277 
278 	bw = nouveau_get_width_in_blocks(stride);
279 	bh = nouveau_get_height_in_blocks(drm, h, tile_mode);
280 
281 	bl_size = bw * bh * (1 << tile_mode) * gob_size;
282 
283 	DRM_DEBUG_KMS("offset=%u stride=%u h=%u tile_mode=0x%02x bw=%u bh=%u gob_size=%u bl_size=%llu size=%zu\n",
284 		      offset, stride, h, tile_mode, bw, bh, gob_size, bl_size,
285 		      nvbo->bo.base.size);
286 
287 	if (bl_size + offset > nvbo->bo.base.size)
288 		return -ERANGE;
289 
290 	return 0;
291 }
292 
293 int
294 nouveau_framebuffer_new(struct drm_device *dev,
295 			const struct drm_mode_fb_cmd2 *mode_cmd,
296 			struct drm_gem_object *gem,
297 			struct drm_framebuffer **pfb)
298 {
299 	struct nouveau_drm *drm = nouveau_drm(dev);
300 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
301 	struct drm_framebuffer *fb;
302 	const struct drm_format_info *info;
303 	unsigned int height, i;
304 	uint32_t tile_mode;
305 	uint8_t kind;
306 	int ret;
307 
308         /* YUV overlays have special requirements pre-NV50 */
309 	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA &&
310 
311 	    (mode_cmd->pixel_format == DRM_FORMAT_YUYV ||
312 	     mode_cmd->pixel_format == DRM_FORMAT_UYVY ||
313 	     mode_cmd->pixel_format == DRM_FORMAT_NV12 ||
314 	     mode_cmd->pixel_format == DRM_FORMAT_NV21) &&
315 	    (mode_cmd->pitches[0] & 0x3f || /* align 64 */
316 	     mode_cmd->pitches[0] >= 0x10000 || /* at most 64k pitch */
317 	     (mode_cmd->pitches[1] && /* pitches for planes must match */
318 	      mode_cmd->pitches[0] != mode_cmd->pitches[1]))) {
319 		DRM_DEBUG_KMS("Unsuitable framebuffer: format: %p4cc; pitches: 0x%x\n 0x%x\n",
320 			      &mode_cmd->pixel_format,
321 			      mode_cmd->pitches[0], mode_cmd->pitches[1]);
322 		return -EINVAL;
323 	}
324 
325 	if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) {
326 		if (nouveau_validate_decode_mod(drm, mode_cmd->modifier[0],
327 						&tile_mode, &kind)) {
328 			DRM_DEBUG_KMS("Unsupported modifier: 0x%llx\n",
329 				      mode_cmd->modifier[0]);
330 			return -EINVAL;
331 		}
332 	} else {
333 		tile_mode = nvbo->mode;
334 		kind = nvbo->kind;
335 	}
336 
337 	info = drm_get_format_info(dev, mode_cmd);
338 
339 	for (i = 0; i < info->num_planes; i++) {
340 		height = drm_format_info_plane_height(info,
341 						      mode_cmd->height,
342 						      i);
343 
344 		if (kind) {
345 			ret = nouveau_check_bl_size(drm, nvbo,
346 						    mode_cmd->offsets[i],
347 						    mode_cmd->pitches[i],
348 						    height, tile_mode);
349 			if (ret)
350 				return ret;
351 		} else {
352 			uint32_t size = mode_cmd->pitches[i] * height;
353 
354 			if (size + mode_cmd->offsets[i] > nvbo->bo.base.size)
355 				return -ERANGE;
356 		}
357 	}
358 
359 	if (!(fb = *pfb = kzalloc(sizeof(*fb), GFP_KERNEL)))
360 		return -ENOMEM;
361 
362 	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
363 	fb->obj[0] = gem;
364 
365 	ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
366 	if (ret)
367 		kfree(fb);
368 	return ret;
369 }
370 
371 struct drm_framebuffer *
372 nouveau_user_framebuffer_create(struct drm_device *dev,
373 				struct drm_file *file_priv,
374 				const struct drm_mode_fb_cmd2 *mode_cmd)
375 {
376 	struct drm_framebuffer *fb;
377 	struct drm_gem_object *gem;
378 	int ret;
379 
380 	gem = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
381 	if (!gem)
382 		return ERR_PTR(-ENOENT);
383 
384 	ret = nouveau_framebuffer_new(dev, mode_cmd, gem, &fb);
385 	if (ret == 0)
386 		return fb;
387 
388 	drm_gem_object_put(gem);
389 	return ERR_PTR(ret);
390 }
391 
392 static const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
393 	.fb_create = nouveau_user_framebuffer_create,
394 	.output_poll_changed = drm_fb_helper_output_poll_changed,
395 };
396 
397 
398 struct nouveau_drm_prop_enum_list {
399 	u8 gen_mask;
400 	int type;
401 	char *name;
402 };
403 
404 static struct nouveau_drm_prop_enum_list underscan[] = {
405 	{ 6, UNDERSCAN_AUTO, "auto" },
406 	{ 6, UNDERSCAN_OFF, "off" },
407 	{ 6, UNDERSCAN_ON, "on" },
408 	{}
409 };
410 
411 static struct nouveau_drm_prop_enum_list dither_mode[] = {
412 	{ 7, DITHERING_MODE_AUTO, "auto" },
413 	{ 7, DITHERING_MODE_OFF, "off" },
414 	{ 1, DITHERING_MODE_ON, "on" },
415 	{ 6, DITHERING_MODE_STATIC2X2, "static 2x2" },
416 	{ 6, DITHERING_MODE_DYNAMIC2X2, "dynamic 2x2" },
417 	{ 4, DITHERING_MODE_TEMPORAL, "temporal" },
418 	{}
419 };
420 
421 static struct nouveau_drm_prop_enum_list dither_depth[] = {
422 	{ 6, DITHERING_DEPTH_AUTO, "auto" },
423 	{ 6, DITHERING_DEPTH_6BPC, "6 bpc" },
424 	{ 6, DITHERING_DEPTH_8BPC, "8 bpc" },
425 	{}
426 };
427 
428 #define PROP_ENUM(p,gen,n,list) do {                                           \
429 	struct nouveau_drm_prop_enum_list *l = (list);                         \
430 	int c = 0;                                                             \
431 	while (l->gen_mask) {                                                  \
432 		if (l->gen_mask & (1 << (gen)))                                \
433 			c++;                                                   \
434 		l++;                                                           \
435 	}                                                                      \
436 	if (c) {                                                               \
437 		p = drm_property_create(dev, DRM_MODE_PROP_ENUM, n, c);        \
438 		l = (list);                                                    \
439 		while (p && l->gen_mask) {                                     \
440 			if (l->gen_mask & (1 << (gen))) {                      \
441 				drm_property_add_enum(p, l->type, l->name);    \
442 			}                                                      \
443 			l++;                                                   \
444 		}                                                              \
445 	}                                                                      \
446 } while(0)
447 
448 void
449 nouveau_display_hpd_resume(struct drm_device *dev)
450 {
451 	struct nouveau_drm *drm = nouveau_drm(dev);
452 
453 	if (drm->headless)
454 		return;
455 
456 	spin_lock_irq(&drm->hpd_lock);
457 	drm->hpd_pending = ~0;
458 	spin_unlock_irq(&drm->hpd_lock);
459 
460 	schedule_work(&drm->hpd_work);
461 }
462 
463 static void
464 nouveau_display_hpd_work(struct work_struct *work)
465 {
466 	struct nouveau_drm *drm = container_of(work, typeof(*drm), hpd_work);
467 	struct drm_device *dev = drm->dev;
468 	struct drm_connector *connector;
469 	struct drm_connector_list_iter conn_iter;
470 	u32 pending;
471 	int changed = 0;
472 	struct drm_connector *first_changed_connector = NULL;
473 
474 	pm_runtime_get_sync(dev->dev);
475 
476 	spin_lock_irq(&drm->hpd_lock);
477 	pending = drm->hpd_pending;
478 	drm->hpd_pending = 0;
479 	spin_unlock_irq(&drm->hpd_lock);
480 
481 	/* Nothing to do, exit early without updating the last busy counter */
482 	if (!pending)
483 		goto noop;
484 
485 	mutex_lock(&dev->mode_config.mutex);
486 	drm_connector_list_iter_begin(dev, &conn_iter);
487 
488 	nouveau_for_each_non_mst_connector_iter(connector, &conn_iter) {
489 		struct nouveau_connector *nv_connector = nouveau_connector(connector);
490 		enum drm_connector_status old_status = connector->status;
491 		u64 bits, old_epoch_counter = connector->epoch_counter;
492 
493 		if (!(pending & drm_connector_mask(connector)))
494 			continue;
495 
496 		spin_lock_irq(&drm->hpd_lock);
497 		bits = nv_connector->hpd_pending;
498 		nv_connector->hpd_pending = 0;
499 		spin_unlock_irq(&drm->hpd_lock);
500 
501 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] plug:%d unplug:%d irq:%d\n",
502 			    connector->base.id, connector->name,
503 			    !!(bits & NVIF_CONN_EVENT_V0_PLUG),
504 			    !!(bits & NVIF_CONN_EVENT_V0_UNPLUG),
505 			    !!(bits & NVIF_CONN_EVENT_V0_IRQ));
506 
507 		if (bits & NVIF_CONN_EVENT_V0_IRQ) {
508 			if (nouveau_dp_link_check(nv_connector))
509 				continue;
510 		}
511 
512 		connector->status = drm_helper_probe_detect(connector, NULL, false);
513 		if (old_epoch_counter == connector->epoch_counter)
514 			continue;
515 
516 		changed++;
517 		if (!first_changed_connector) {
518 			drm_connector_get(connector);
519 			first_changed_connector = connector;
520 		}
521 
522 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s (epoch counter %llu->%llu)\n",
523 			    connector->base.id, connector->name,
524 			    drm_get_connector_status_name(old_status),
525 			    drm_get_connector_status_name(connector->status),
526 			    old_epoch_counter, connector->epoch_counter);
527 	}
528 
529 	drm_connector_list_iter_end(&conn_iter);
530 	mutex_unlock(&dev->mode_config.mutex);
531 
532 	if (changed == 1)
533 		drm_kms_helper_connector_hotplug_event(first_changed_connector);
534 	else if (changed > 0)
535 		drm_kms_helper_hotplug_event(dev);
536 
537 	if (first_changed_connector)
538 		drm_connector_put(first_changed_connector);
539 
540 	pm_runtime_mark_last_busy(drm->dev->dev);
541 noop:
542 	pm_runtime_put_autosuspend(dev->dev);
543 }
544 
545 #ifdef CONFIG_ACPI
546 
547 static int
548 nouveau_display_acpi_ntfy(struct notifier_block *nb, unsigned long val,
549 			  void *data)
550 {
551 	struct nouveau_drm *drm = container_of(nb, typeof(*drm), acpi_nb);
552 	struct acpi_bus_event *info = data;
553 	int ret;
554 
555 	if (!strcmp(info->device_class, ACPI_VIDEO_CLASS)) {
556 		if (info->type == ACPI_VIDEO_NOTIFY_PROBE) {
557 			ret = pm_runtime_get(drm->dev->dev);
558 			if (ret == 1 || ret == -EACCES) {
559 				/* If the GPU is already awake, or in a state
560 				 * where we can't wake it up, it can handle
561 				 * it's own hotplug events.
562 				 */
563 				pm_runtime_put_autosuspend(drm->dev->dev);
564 			} else if (ret == 0 || ret == -EINPROGRESS) {
565 				/* We've started resuming the GPU already, so
566 				 * it will handle scheduling a full reprobe
567 				 * itself
568 				 */
569 				NV_DEBUG(drm, "ACPI requested connector reprobe\n");
570 				pm_runtime_put_noidle(drm->dev->dev);
571 			} else {
572 				NV_WARN(drm, "Dropped ACPI reprobe event due to RPM error: %d\n",
573 					ret);
574 			}
575 
576 			/* acpi-video should not generate keypresses for this */
577 			return NOTIFY_BAD;
578 		}
579 	}
580 
581 	return NOTIFY_DONE;
582 }
583 #endif
584 
585 int
586 nouveau_display_init(struct drm_device *dev, bool resume, bool runtime)
587 {
588 	struct nouveau_display *disp = nouveau_display(dev);
589 	struct drm_connector *connector;
590 	struct drm_connector_list_iter conn_iter;
591 	int ret;
592 
593 	/*
594 	 * Enable hotplug interrupts (done as early as possible, since we need
595 	 * them for MST)
596 	 */
597 	drm_connector_list_iter_begin(dev, &conn_iter);
598 	nouveau_for_each_non_mst_connector_iter(connector, &conn_iter) {
599 		struct nouveau_connector *conn = nouveau_connector(connector);
600 		nvif_event_allow(&conn->hpd);
601 		nvif_event_allow(&conn->irq);
602 	}
603 	drm_connector_list_iter_end(&conn_iter);
604 
605 	ret = disp->init(dev, resume, runtime);
606 	if (ret)
607 		return ret;
608 
609 	/* enable connector detection and polling for connectors without HPD
610 	 * support
611 	 */
612 	drm_kms_helper_poll_enable(dev);
613 
614 	return ret;
615 }
616 
617 void
618 nouveau_display_fini(struct drm_device *dev, bool suspend, bool runtime)
619 {
620 	struct nouveau_display *disp = nouveau_display(dev);
621 	struct nouveau_drm *drm = nouveau_drm(dev);
622 	struct drm_connector *connector;
623 	struct drm_connector_list_iter conn_iter;
624 
625 	if (!suspend) {
626 		if (drm_drv_uses_atomic_modeset(dev))
627 			drm_atomic_helper_shutdown(dev);
628 		else
629 			drm_helper_force_disable_all(dev);
630 	}
631 
632 	/* disable hotplug interrupts */
633 	drm_connector_list_iter_begin(dev, &conn_iter);
634 	nouveau_for_each_non_mst_connector_iter(connector, &conn_iter) {
635 		struct nouveau_connector *conn = nouveau_connector(connector);
636 		nvif_event_block(&conn->irq);
637 		nvif_event_block(&conn->hpd);
638 	}
639 	drm_connector_list_iter_end(&conn_iter);
640 
641 	if (!runtime && !drm->headless)
642 		cancel_work_sync(&drm->hpd_work);
643 
644 	drm_kms_helper_poll_disable(dev);
645 	disp->fini(dev, runtime, suspend);
646 }
647 
648 static void
649 nouveau_display_create_properties(struct drm_device *dev)
650 {
651 	struct nouveau_display *disp = nouveau_display(dev);
652 	int gen;
653 
654 	if (disp->disp.object.oclass < NV50_DISP)
655 		gen = 0;
656 	else
657 	if (disp->disp.object.oclass < GF110_DISP)
658 		gen = 1;
659 	else
660 		gen = 2;
661 
662 	PROP_ENUM(disp->dithering_mode, gen, "dithering mode", dither_mode);
663 	PROP_ENUM(disp->dithering_depth, gen, "dithering depth", dither_depth);
664 	PROP_ENUM(disp->underscan_property, gen, "underscan", underscan);
665 
666 	disp->underscan_hborder_property =
667 		drm_property_create_range(dev, 0, "underscan hborder", 0, 128);
668 
669 	disp->underscan_vborder_property =
670 		drm_property_create_range(dev, 0, "underscan vborder", 0, 128);
671 
672 	if (gen < 1)
673 		return;
674 
675 	/* -90..+90 */
676 	disp->vibrant_hue_property =
677 		drm_property_create_range(dev, 0, "vibrant hue", 0, 180);
678 
679 	/* -100..+100 */
680 	disp->color_vibrance_property =
681 		drm_property_create_range(dev, 0, "color vibrance", 0, 200);
682 }
683 
684 int
685 nouveau_display_create(struct drm_device *dev)
686 {
687 	struct nouveau_drm *drm = nouveau_drm(dev);
688 	struct nouveau_display *disp;
689 	int ret;
690 
691 	disp = drm->display = kzalloc(sizeof(*disp), GFP_KERNEL);
692 	if (!disp)
693 		return -ENOMEM;
694 
695 	drm_mode_config_init(dev);
696 	drm_mode_create_scaling_mode_property(dev);
697 	drm_mode_create_dvi_i_properties(dev);
698 
699 	dev->mode_config.funcs = &nouveau_mode_config_funcs;
700 
701 	dev->mode_config.min_width = 0;
702 	dev->mode_config.min_height = 0;
703 	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_CELSIUS) {
704 		dev->mode_config.max_width = 2048;
705 		dev->mode_config.max_height = 2048;
706 	} else
707 	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
708 		dev->mode_config.max_width = 4096;
709 		dev->mode_config.max_height = 4096;
710 	} else
711 	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_FERMI) {
712 		dev->mode_config.max_width = 8192;
713 		dev->mode_config.max_height = 8192;
714 	} else {
715 		dev->mode_config.max_width = 16384;
716 		dev->mode_config.max_height = 16384;
717 	}
718 
719 	dev->mode_config.preferred_depth = 24;
720 	dev->mode_config.prefer_shadow = 1;
721 
722 	if (drm->client.device.info.chipset < 0x11)
723 		dev->mode_config.async_page_flip = false;
724 	else
725 		dev->mode_config.async_page_flip = true;
726 
727 	drm_kms_helper_poll_init(dev);
728 	drm_kms_helper_poll_disable(dev);
729 
730 	if (nouveau_modeset != 2) {
731 		ret = nvif_disp_ctor(&drm->client.device, "kmsDisp", 0, &disp->disp);
732 		/* no display hw */
733 		if (ret == -ENODEV) {
734 			ret = 0;
735 			drm->headless = true;
736 			goto disp_create_err;
737 		}
738 
739 		if (!ret && (disp->disp.outp_mask || drm->vbios.dcb.entries)) {
740 			nouveau_display_create_properties(dev);
741 			if (disp->disp.object.oclass < NV50_DISP) {
742 				dev->mode_config.fb_modifiers_not_supported = true;
743 				ret = nv04_display_create(dev);
744 			} else {
745 				ret = nv50_display_create(dev);
746 			}
747 		}
748 	} else {
749 		ret = 0;
750 	}
751 
752 	if (ret)
753 		goto disp_create_err;
754 
755 	drm_mode_config_reset(dev);
756 
757 	if (dev->mode_config.num_crtc) {
758 		ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
759 		if (ret)
760 			goto vblank_err;
761 
762 		if (disp->disp.object.oclass >= NV50_DISP)
763 			nv50_crc_init(dev);
764 	}
765 
766 	INIT_WORK(&drm->hpd_work, nouveau_display_hpd_work);
767 	spin_lock_init(&drm->hpd_lock);
768 #ifdef CONFIG_ACPI
769 	drm->acpi_nb.notifier_call = nouveau_display_acpi_ntfy;
770 	register_acpi_notifier(&drm->acpi_nb);
771 #endif
772 
773 	return 0;
774 
775 vblank_err:
776 	disp->dtor(dev);
777 disp_create_err:
778 	drm_kms_helper_poll_fini(dev);
779 	drm_mode_config_cleanup(dev);
780 	return ret;
781 }
782 
783 void
784 nouveau_display_destroy(struct drm_device *dev)
785 {
786 	struct nouveau_display *disp = nouveau_display(dev);
787 	struct nouveau_drm *drm = nouveau_drm(dev);
788 
789 #ifdef CONFIG_ACPI
790 	unregister_acpi_notifier(&drm->acpi_nb);
791 #endif
792 
793 	drm_kms_helper_poll_fini(dev);
794 	drm_mode_config_cleanup(dev);
795 
796 	if (disp->dtor)
797 		disp->dtor(dev);
798 
799 	nvif_disp_dtor(&disp->disp);
800 
801 	drm->display = NULL;
802 	kfree(disp);
803 }
804 
805 int
806 nouveau_display_suspend(struct drm_device *dev, bool runtime)
807 {
808 	struct nouveau_display *disp = nouveau_display(dev);
809 
810 	/* Disable console. */
811 	drm_fb_helper_set_suspend_unlocked(dev->fb_helper, true);
812 
813 	if (drm_drv_uses_atomic_modeset(dev)) {
814 		if (!runtime) {
815 			disp->suspend = drm_atomic_helper_suspend(dev);
816 			if (IS_ERR(disp->suspend)) {
817 				int ret = PTR_ERR(disp->suspend);
818 				disp->suspend = NULL;
819 				return ret;
820 			}
821 		}
822 	}
823 
824 	nouveau_display_fini(dev, true, runtime);
825 	return 0;
826 }
827 
828 void
829 nouveau_display_resume(struct drm_device *dev, bool runtime)
830 {
831 	struct nouveau_display *disp = nouveau_display(dev);
832 
833 	nouveau_display_init(dev, true, runtime);
834 
835 	if (drm_drv_uses_atomic_modeset(dev)) {
836 		if (disp->suspend) {
837 			drm_atomic_helper_resume(dev, disp->suspend);
838 			disp->suspend = NULL;
839 		}
840 	}
841 
842 	/* Enable console. */
843 	drm_fb_helper_set_suspend_unlocked(dev->fb_helper, false);
844 }
845 
846 int
847 nouveau_display_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
848 			    struct drm_mode_create_dumb *args)
849 {
850 	struct nouveau_cli *cli = nouveau_cli(file_priv);
851 	struct nouveau_bo *bo;
852 	uint32_t domain;
853 	int ret;
854 
855 	args->pitch = roundup(args->width * (args->bpp / 8), 256);
856 	args->size = args->pitch * args->height;
857 	args->size = roundup(args->size, PAGE_SIZE);
858 
859 	/* Use VRAM if there is any ; otherwise fallback to system memory */
860 	if (nouveau_drm(dev)->client.device.info.ram_size != 0)
861 		domain = NOUVEAU_GEM_DOMAIN_VRAM;
862 	else
863 		domain = NOUVEAU_GEM_DOMAIN_GART;
864 
865 	ret = nouveau_gem_new(cli, args->size, 0, domain, 0, 0, &bo);
866 	if (ret)
867 		return ret;
868 
869 	ret = drm_gem_handle_create(file_priv, &bo->bo.base, &args->handle);
870 	drm_gem_object_put(&bo->bo.base);
871 	return ret;
872 }
873