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/button.h>
28 
29 #include <linux/pm_runtime.h>
30 #include <linux/vga_switcheroo.h>
31 
32 #include <drm/drm_atomic_helper.h>
33 #include <drm/drm_edid.h>
34 #include <drm/drm_crtc_helper.h>
35 #include <drm/drm_probe_helper.h>
36 #include <drm/drm_atomic.h>
37 
38 #include "nouveau_reg.h"
39 #include "nouveau_drv.h"
40 #include "dispnv04/hw.h"
41 #include "dispnv50/disp.h"
42 #include "nouveau_acpi.h"
43 
44 #include "nouveau_display.h"
45 #include "nouveau_connector.h"
46 #include "nouveau_encoder.h"
47 #include "nouveau_crtc.h"
48 
49 #include <nvif/class.h>
50 #include <nvif/if0011.h>
51 
52 struct drm_display_mode *
53 nouveau_conn_native_mode(struct drm_connector *connector)
54 {
55 	const struct drm_connector_helper_funcs *helper = connector->helper_private;
56 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
57 	struct drm_device *dev = connector->dev;
58 	struct drm_display_mode *mode, *largest = NULL;
59 	int high_w = 0, high_h = 0, high_v = 0;
60 
61 	list_for_each_entry(mode, &connector->probed_modes, head) {
62 		if (helper->mode_valid(connector, mode) != MODE_OK ||
63 		    (mode->flags & DRM_MODE_FLAG_INTERLACE))
64 			continue;
65 
66 		/* Use preferred mode if there is one.. */
67 		if (mode->type & DRM_MODE_TYPE_PREFERRED) {
68 			NV_DEBUG(drm, "native mode from preferred\n");
69 			return drm_mode_duplicate(dev, mode);
70 		}
71 
72 		/* Otherwise, take the resolution with the largest width, then
73 		 * height, then vertical refresh
74 		 */
75 		if (mode->hdisplay < high_w)
76 			continue;
77 
78 		if (mode->hdisplay == high_w && mode->vdisplay < high_h)
79 			continue;
80 
81 		if (mode->hdisplay == high_w && mode->vdisplay == high_h &&
82 		    drm_mode_vrefresh(mode) < high_v)
83 			continue;
84 
85 		high_w = mode->hdisplay;
86 		high_h = mode->vdisplay;
87 		high_v = drm_mode_vrefresh(mode);
88 		largest = mode;
89 	}
90 
91 	NV_DEBUG(drm, "native mode from largest: %dx%d@%d\n",
92 		      high_w, high_h, high_v);
93 	return largest ? drm_mode_duplicate(dev, largest) : NULL;
94 }
95 
96 int
97 nouveau_conn_atomic_get_property(struct drm_connector *connector,
98 				 const struct drm_connector_state *state,
99 				 struct drm_property *property, u64 *val)
100 {
101 	struct nouveau_conn_atom *asyc = nouveau_conn_atom(state);
102 	struct nouveau_display *disp = nouveau_display(connector->dev);
103 	struct drm_device *dev = connector->dev;
104 
105 	if (property == dev->mode_config.scaling_mode_property)
106 		*val = asyc->scaler.mode;
107 	else if (property == disp->underscan_property)
108 		*val = asyc->scaler.underscan.mode;
109 	else if (property == disp->underscan_hborder_property)
110 		*val = asyc->scaler.underscan.hborder;
111 	else if (property == disp->underscan_vborder_property)
112 		*val = asyc->scaler.underscan.vborder;
113 	else if (property == disp->dithering_mode)
114 		*val = asyc->dither.mode;
115 	else if (property == disp->dithering_depth)
116 		*val = asyc->dither.depth;
117 	else if (property == disp->vibrant_hue_property)
118 		*val = asyc->procamp.vibrant_hue;
119 	else if (property == disp->color_vibrance_property)
120 		*val = asyc->procamp.color_vibrance;
121 	else
122 		return -EINVAL;
123 
124 	return 0;
125 }
126 
127 int
128 nouveau_conn_atomic_set_property(struct drm_connector *connector,
129 				 struct drm_connector_state *state,
130 				 struct drm_property *property, u64 val)
131 {
132 	struct drm_device *dev = connector->dev;
133 	struct nouveau_conn_atom *asyc = nouveau_conn_atom(state);
134 	struct nouveau_display *disp = nouveau_display(dev);
135 
136 	if (property == dev->mode_config.scaling_mode_property) {
137 		switch (val) {
138 		case DRM_MODE_SCALE_NONE:
139 			/* We allow 'None' for EDID modes, even on a fixed
140 			 * panel (some exist with support for lower refresh
141 			 * rates, which people might want to use for power-
142 			 * saving purposes).
143 			 *
144 			 * Non-EDID modes will force the use of GPU scaling
145 			 * to the native mode regardless of this setting.
146 			 */
147 			switch (connector->connector_type) {
148 			case DRM_MODE_CONNECTOR_LVDS:
149 			case DRM_MODE_CONNECTOR_eDP:
150 				/* ... except prior to G80, where the code
151 				 * doesn't support such things.
152 				 */
153 				if (disp->disp.object.oclass < NV50_DISP)
154 					return -EINVAL;
155 				break;
156 			default:
157 				break;
158 			}
159 			break;
160 		case DRM_MODE_SCALE_FULLSCREEN:
161 		case DRM_MODE_SCALE_CENTER:
162 		case DRM_MODE_SCALE_ASPECT:
163 			break;
164 		default:
165 			return -EINVAL;
166 		}
167 
168 		if (asyc->scaler.mode != val) {
169 			asyc->scaler.mode = val;
170 			asyc->set.scaler = true;
171 		}
172 	} else
173 	if (property == disp->underscan_property) {
174 		if (asyc->scaler.underscan.mode != val) {
175 			asyc->scaler.underscan.mode = val;
176 			asyc->set.scaler = true;
177 		}
178 	} else
179 	if (property == disp->underscan_hborder_property) {
180 		if (asyc->scaler.underscan.hborder != val) {
181 			asyc->scaler.underscan.hborder = val;
182 			asyc->set.scaler = true;
183 		}
184 	} else
185 	if (property == disp->underscan_vborder_property) {
186 		if (asyc->scaler.underscan.vborder != val) {
187 			asyc->scaler.underscan.vborder = val;
188 			asyc->set.scaler = true;
189 		}
190 	} else
191 	if (property == disp->dithering_mode) {
192 		if (asyc->dither.mode != val) {
193 			asyc->dither.mode = val;
194 			asyc->set.dither = true;
195 		}
196 	} else
197 	if (property == disp->dithering_depth) {
198 		if (asyc->dither.mode != val) {
199 			asyc->dither.depth = val;
200 			asyc->set.dither = true;
201 		}
202 	} else
203 	if (property == disp->vibrant_hue_property) {
204 		if (asyc->procamp.vibrant_hue != val) {
205 			asyc->procamp.vibrant_hue = val;
206 			asyc->set.procamp = true;
207 		}
208 	} else
209 	if (property == disp->color_vibrance_property) {
210 		if (asyc->procamp.color_vibrance != val) {
211 			asyc->procamp.color_vibrance = val;
212 			asyc->set.procamp = true;
213 		}
214 	} else {
215 		return -EINVAL;
216 	}
217 
218 	return 0;
219 }
220 
221 void
222 nouveau_conn_atomic_destroy_state(struct drm_connector *connector,
223 				  struct drm_connector_state *state)
224 {
225 	struct nouveau_conn_atom *asyc = nouveau_conn_atom(state);
226 	__drm_atomic_helper_connector_destroy_state(&asyc->state);
227 	kfree(asyc);
228 }
229 
230 struct drm_connector_state *
231 nouveau_conn_atomic_duplicate_state(struct drm_connector *connector)
232 {
233 	struct nouveau_conn_atom *armc = nouveau_conn_atom(connector->state);
234 	struct nouveau_conn_atom *asyc;
235 	if (!(asyc = kmalloc(sizeof(*asyc), GFP_KERNEL)))
236 		return NULL;
237 	__drm_atomic_helper_connector_duplicate_state(connector, &asyc->state);
238 	asyc->dither = armc->dither;
239 	asyc->scaler = armc->scaler;
240 	asyc->procamp = armc->procamp;
241 	asyc->set.mask = 0;
242 	return &asyc->state;
243 }
244 
245 void
246 nouveau_conn_reset(struct drm_connector *connector)
247 {
248 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
249 	struct nouveau_conn_atom *asyc;
250 
251 	if (drm_drv_uses_atomic_modeset(connector->dev)) {
252 		if (WARN_ON(!(asyc = kzalloc(sizeof(*asyc), GFP_KERNEL))))
253 			return;
254 
255 		if (connector->state)
256 			nouveau_conn_atomic_destroy_state(connector,
257 							  connector->state);
258 
259 		__drm_atomic_helper_connector_reset(connector, &asyc->state);
260 	} else {
261 		asyc = &nv_connector->properties_state;
262 	}
263 
264 	asyc->dither.mode = DITHERING_MODE_AUTO;
265 	asyc->dither.depth = DITHERING_DEPTH_AUTO;
266 	asyc->scaler.mode = DRM_MODE_SCALE_NONE;
267 	asyc->scaler.underscan.mode = UNDERSCAN_OFF;
268 	asyc->procamp.color_vibrance = 150;
269 	asyc->procamp.vibrant_hue = 90;
270 
271 	if (nouveau_display(connector->dev)->disp.object.oclass < NV50_DISP) {
272 		switch (connector->connector_type) {
273 		case DRM_MODE_CONNECTOR_LVDS:
274 			/* See note in nouveau_conn_atomic_set_property(). */
275 			asyc->scaler.mode = DRM_MODE_SCALE_FULLSCREEN;
276 			break;
277 		default:
278 			break;
279 		}
280 	}
281 }
282 
283 void
284 nouveau_conn_attach_properties(struct drm_connector *connector)
285 {
286 	struct drm_device *dev = connector->dev;
287 	struct nouveau_display *disp = nouveau_display(dev);
288 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
289 	struct nouveau_conn_atom *armc;
290 
291 	if (drm_drv_uses_atomic_modeset(connector->dev))
292 		armc = nouveau_conn_atom(connector->state);
293 	else
294 		armc = &nv_connector->properties_state;
295 
296 	/* Init DVI-I specific properties. */
297 	if (connector->connector_type == DRM_MODE_CONNECTOR_DVII)
298 		drm_object_attach_property(&connector->base, dev->mode_config.
299 					   dvi_i_subconnector_property, 0);
300 
301 	/* Add overscan compensation options to digital outputs. */
302 	if (disp->underscan_property &&
303 	    (connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
304 	     connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
305 	     connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
306 	     connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)) {
307 		drm_object_attach_property(&connector->base,
308 					   disp->underscan_property,
309 					   UNDERSCAN_OFF);
310 		drm_object_attach_property(&connector->base,
311 					   disp->underscan_hborder_property, 0);
312 		drm_object_attach_property(&connector->base,
313 					   disp->underscan_vborder_property, 0);
314 	}
315 
316 	/* Add hue and saturation options. */
317 	if (disp->vibrant_hue_property)
318 		drm_object_attach_property(&connector->base,
319 					   disp->vibrant_hue_property,
320 					   armc->procamp.vibrant_hue);
321 	if (disp->color_vibrance_property)
322 		drm_object_attach_property(&connector->base,
323 					   disp->color_vibrance_property,
324 					   armc->procamp.color_vibrance);
325 
326 	/* Scaling mode property. */
327 	switch (connector->connector_type) {
328 	case DRM_MODE_CONNECTOR_TV:
329 		break;
330 	case DRM_MODE_CONNECTOR_VGA:
331 		if (disp->disp.object.oclass < NV50_DISP)
332 			break; /* Can only scale on DFPs. */
333 		fallthrough;
334 	default:
335 		drm_object_attach_property(&connector->base, dev->mode_config.
336 					   scaling_mode_property,
337 					   armc->scaler.mode);
338 		break;
339 	}
340 
341 	/* Dithering properties. */
342 	switch (connector->connector_type) {
343 	case DRM_MODE_CONNECTOR_TV:
344 	case DRM_MODE_CONNECTOR_VGA:
345 		break;
346 	default:
347 		if (disp->dithering_mode) {
348 			drm_object_attach_property(&connector->base,
349 						   disp->dithering_mode,
350 						   armc->dither.mode);
351 		}
352 		if (disp->dithering_depth) {
353 			drm_object_attach_property(&connector->base,
354 						   disp->dithering_depth,
355 						   armc->dither.depth);
356 		}
357 		break;
358 	}
359 }
360 
361 MODULE_PARM_DESC(tv_disable, "Disable TV-out detection");
362 int nouveau_tv_disable = 0;
363 module_param_named(tv_disable, nouveau_tv_disable, int, 0400);
364 
365 MODULE_PARM_DESC(ignorelid, "Ignore ACPI lid status");
366 int nouveau_ignorelid = 0;
367 module_param_named(ignorelid, nouveau_ignorelid, int, 0400);
368 
369 MODULE_PARM_DESC(duallink, "Allow dual-link TMDS (default: enabled)");
370 int nouveau_duallink = 1;
371 module_param_named(duallink, nouveau_duallink, int, 0400);
372 
373 MODULE_PARM_DESC(hdmimhz, "Force a maximum HDMI pixel clock (in MHz)");
374 int nouveau_hdmimhz = 0;
375 module_param_named(hdmimhz, nouveau_hdmimhz, int, 0400);
376 
377 struct nouveau_encoder *
378 find_encoder(struct drm_connector *connector, int type)
379 {
380 	struct nouveau_encoder *nv_encoder;
381 	struct drm_encoder *enc;
382 
383 	drm_connector_for_each_possible_encoder(connector, enc) {
384 		nv_encoder = nouveau_encoder(enc);
385 
386 		if (type == DCB_OUTPUT_ANY ||
387 		    (nv_encoder->dcb && nv_encoder->dcb->type == type))
388 			return nv_encoder;
389 	}
390 
391 	return NULL;
392 }
393 
394 static void
395 nouveau_connector_destroy(struct drm_connector *connector)
396 {
397 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
398 	nvif_event_dtor(&nv_connector->irq);
399 	nvif_event_dtor(&nv_connector->hpd);
400 	kfree(nv_connector->edid);
401 	drm_connector_unregister(connector);
402 	drm_connector_cleanup(connector);
403 	if (nv_connector->aux.transfer) {
404 		drm_dp_cec_unregister_connector(&nv_connector->aux);
405 		kfree(nv_connector->aux.name);
406 	}
407 	nvif_conn_dtor(&nv_connector->conn);
408 	kfree(connector);
409 }
410 
411 static struct nouveau_encoder *
412 nouveau_connector_ddc_detect(struct drm_connector *connector)
413 {
414 	struct drm_device *dev = connector->dev;
415 	struct pci_dev *pdev = to_pci_dev(dev->dev);
416 	struct nouveau_encoder *nv_encoder = NULL, *found = NULL;
417 	struct drm_encoder *encoder;
418 	int ret;
419 	bool switcheroo_ddc = false;
420 
421 	drm_connector_for_each_possible_encoder(connector, encoder) {
422 		nv_encoder = nouveau_encoder(encoder);
423 
424 		switch (nv_encoder->dcb->type) {
425 		case DCB_OUTPUT_DP:
426 			ret = nouveau_dp_detect(nouveau_connector(connector),
427 						nv_encoder);
428 			if (ret == NOUVEAU_DP_MST)
429 				return NULL;
430 			else if (ret == NOUVEAU_DP_SST)
431 				found = nv_encoder;
432 
433 			break;
434 		case DCB_OUTPUT_LVDS:
435 			switcheroo_ddc = !!(vga_switcheroo_handler_flags() &
436 					    VGA_SWITCHEROO_CAN_SWITCH_DDC);
437 			fallthrough;
438 		default:
439 			if (!nv_encoder->i2c)
440 				break;
441 
442 			if (switcheroo_ddc)
443 				vga_switcheroo_lock_ddc(pdev);
444 			if (nvkm_probe_i2c(nv_encoder->i2c, 0x50))
445 				found = nv_encoder;
446 			if (switcheroo_ddc)
447 				vga_switcheroo_unlock_ddc(pdev);
448 
449 			break;
450 		}
451 		if (found)
452 			break;
453 	}
454 
455 	return found;
456 }
457 
458 static struct nouveau_encoder *
459 nouveau_connector_of_detect(struct drm_connector *connector)
460 {
461 #ifdef __powerpc__
462 	struct drm_device *dev = connector->dev;
463 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
464 	struct nouveau_encoder *nv_encoder;
465 	struct pci_dev *pdev = to_pci_dev(dev->dev);
466 	struct device_node *cn, *dn = pci_device_to_OF_node(pdev);
467 
468 	if (!dn ||
469 	    !((nv_encoder = find_encoder(connector, DCB_OUTPUT_TMDS)) ||
470 	      (nv_encoder = find_encoder(connector, DCB_OUTPUT_ANALOG))))
471 		return NULL;
472 
473 	for_each_child_of_node(dn, cn) {
474 		const char *name = of_get_property(cn, "name", NULL);
475 		const void *edid = of_get_property(cn, "EDID", NULL);
476 		int idx = name ? name[strlen(name) - 1] - 'A' : 0;
477 
478 		if (nv_encoder->dcb->i2c_index == idx && edid) {
479 			nv_connector->edid =
480 				kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
481 			of_node_put(cn);
482 			return nv_encoder;
483 		}
484 	}
485 #endif
486 	return NULL;
487 }
488 
489 static void
490 nouveau_connector_set_encoder(struct drm_connector *connector,
491 			      struct nouveau_encoder *nv_encoder)
492 {
493 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
494 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
495 	struct drm_device *dev = connector->dev;
496 	struct pci_dev *pdev = to_pci_dev(dev->dev);
497 
498 	if (nv_connector->detected_encoder == nv_encoder)
499 		return;
500 	nv_connector->detected_encoder = nv_encoder;
501 
502 	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
503 		if (nv_encoder->dcb->type == DCB_OUTPUT_DP)
504 			connector->interlace_allowed =
505 				nv_encoder->caps.dp_interlace;
506 		else
507 			connector->interlace_allowed =
508 				drm->client.device.info.family < NV_DEVICE_INFO_V0_VOLTA;
509 		connector->doublescan_allowed = true;
510 	} else
511 	if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS ||
512 	    nv_encoder->dcb->type == DCB_OUTPUT_TMDS) {
513 		connector->doublescan_allowed = false;
514 		connector->interlace_allowed = false;
515 	} else {
516 		connector->doublescan_allowed = true;
517 		if (drm->client.device.info.family == NV_DEVICE_INFO_V0_KELVIN ||
518 		    (drm->client.device.info.family == NV_DEVICE_INFO_V0_CELSIUS &&
519 		     (pdev->device & 0x0ff0) != 0x0100 &&
520 		     (pdev->device & 0x0ff0) != 0x0150))
521 			/* HW is broken */
522 			connector->interlace_allowed = false;
523 		else
524 			connector->interlace_allowed = true;
525 	}
526 
527 	if (nv_connector->type == DCB_CONNECTOR_DVI_I) {
528 		drm_object_property_set_value(&connector->base,
529 			dev->mode_config.dvi_i_subconnector_property,
530 			nv_encoder->dcb->type == DCB_OUTPUT_TMDS ?
531 			DRM_MODE_SUBCONNECTOR_DVID :
532 			DRM_MODE_SUBCONNECTOR_DVIA);
533 	}
534 }
535 
536 static void
537 nouveau_connector_set_edid(struct nouveau_connector *nv_connector,
538 			   struct edid *edid)
539 {
540 	if (nv_connector->edid != edid) {
541 		struct edid *old_edid = nv_connector->edid;
542 
543 		drm_connector_update_edid_property(&nv_connector->base, edid);
544 		kfree(old_edid);
545 		nv_connector->edid = edid;
546 	}
547 }
548 
549 static enum drm_connector_status
550 nouveau_connector_detect(struct drm_connector *connector, bool force)
551 {
552 	struct drm_device *dev = connector->dev;
553 	struct nouveau_drm *drm = nouveau_drm(dev);
554 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
555 	struct nouveau_encoder *nv_encoder = NULL;
556 	struct nouveau_encoder *nv_partner;
557 	struct i2c_adapter *i2c;
558 	int type;
559 	int ret;
560 	enum drm_connector_status conn_status = connector_status_disconnected;
561 
562 	/* Outputs are only polled while runtime active, so resuming the
563 	 * device here is unnecessary (and would deadlock upon runtime suspend
564 	 * because it waits for polling to finish). We do however, want to
565 	 * prevent the autosuspend timer from elapsing during this operation
566 	 * if possible.
567 	 */
568 	if (drm_kms_helper_is_poll_worker()) {
569 		pm_runtime_get_noresume(dev->dev);
570 	} else {
571 		ret = pm_runtime_get_sync(dev->dev);
572 		if (ret < 0 && ret != -EACCES) {
573 			pm_runtime_put_autosuspend(dev->dev);
574 			nouveau_connector_set_edid(nv_connector, NULL);
575 			return conn_status;
576 		}
577 	}
578 
579 	nv_encoder = nouveau_connector_ddc_detect(connector);
580 	if (nv_encoder && (i2c = nv_encoder->i2c) != NULL) {
581 		struct edid *new_edid;
582 
583 		if ((vga_switcheroo_handler_flags() &
584 		     VGA_SWITCHEROO_CAN_SWITCH_DDC) &&
585 		    nv_connector->type == DCB_CONNECTOR_LVDS)
586 			new_edid = drm_get_edid_switcheroo(connector, i2c);
587 		else
588 			new_edid = drm_get_edid(connector, i2c);
589 
590 		nouveau_connector_set_edid(nv_connector, new_edid);
591 		if (!nv_connector->edid) {
592 			NV_ERROR(drm, "DDC responded, but no EDID for %s\n",
593 				 connector->name);
594 			goto detect_analog;
595 		}
596 
597 		/* Override encoder type for DVI-I based on whether EDID
598 		 * says the display is digital or analog, both use the
599 		 * same i2c channel so the value returned from ddc_detect
600 		 * isn't necessarily correct.
601 		 */
602 		nv_partner = NULL;
603 		if (nv_encoder->dcb->type == DCB_OUTPUT_TMDS)
604 			nv_partner = find_encoder(connector, DCB_OUTPUT_ANALOG);
605 		if (nv_encoder->dcb->type == DCB_OUTPUT_ANALOG)
606 			nv_partner = find_encoder(connector, DCB_OUTPUT_TMDS);
607 
608 		if (nv_partner && ((nv_encoder->dcb->type == DCB_OUTPUT_ANALOG &&
609 				    nv_partner->dcb->type == DCB_OUTPUT_TMDS) ||
610 				   (nv_encoder->dcb->type == DCB_OUTPUT_TMDS &&
611 				    nv_partner->dcb->type == DCB_OUTPUT_ANALOG))) {
612 			if (nv_connector->edid->input & DRM_EDID_INPUT_DIGITAL)
613 				type = DCB_OUTPUT_TMDS;
614 			else
615 				type = DCB_OUTPUT_ANALOG;
616 
617 			nv_encoder = find_encoder(connector, type);
618 		}
619 
620 		nouveau_connector_set_encoder(connector, nv_encoder);
621 		conn_status = connector_status_connected;
622 
623 		if (nv_encoder->dcb->type == DCB_OUTPUT_DP)
624 			drm_dp_cec_set_edid(&nv_connector->aux, nv_connector->edid);
625 
626 		goto out;
627 	} else {
628 		nouveau_connector_set_edid(nv_connector, NULL);
629 	}
630 
631 	nv_encoder = nouveau_connector_of_detect(connector);
632 	if (nv_encoder) {
633 		nouveau_connector_set_encoder(connector, nv_encoder);
634 		conn_status = connector_status_connected;
635 		goto out;
636 	}
637 
638 detect_analog:
639 	nv_encoder = find_encoder(connector, DCB_OUTPUT_ANALOG);
640 	if (!nv_encoder && !nouveau_tv_disable)
641 		nv_encoder = find_encoder(connector, DCB_OUTPUT_TV);
642 	if (nv_encoder && force) {
643 		struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
644 		const struct drm_encoder_helper_funcs *helper =
645 						encoder->helper_private;
646 
647 		if (helper->detect(encoder, connector) ==
648 						connector_status_connected) {
649 			nouveau_connector_set_encoder(connector, nv_encoder);
650 			conn_status = connector_status_connected;
651 			goto out;
652 		}
653 	}
654 
655  out:
656 	if (!nv_connector->edid)
657 		drm_dp_cec_unset_edid(&nv_connector->aux);
658 
659 	pm_runtime_mark_last_busy(dev->dev);
660 	pm_runtime_put_autosuspend(dev->dev);
661 
662 	return conn_status;
663 }
664 
665 static enum drm_connector_status
666 nouveau_connector_detect_lvds(struct drm_connector *connector, bool force)
667 {
668 	struct drm_device *dev = connector->dev;
669 	struct nouveau_drm *drm = nouveau_drm(dev);
670 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
671 	struct nouveau_encoder *nv_encoder = NULL;
672 	struct edid *edid = NULL;
673 	enum drm_connector_status status = connector_status_disconnected;
674 
675 	nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
676 	if (!nv_encoder)
677 		goto out;
678 
679 	/* Try retrieving EDID via DDC */
680 	if (!drm->vbios.fp_no_ddc) {
681 		status = nouveau_connector_detect(connector, force);
682 		if (status == connector_status_connected) {
683 			edid = nv_connector->edid;
684 			goto out;
685 		}
686 	}
687 
688 	/* On some laptops (Sony, i'm looking at you) there appears to
689 	 * be no direct way of accessing the panel's EDID.  The only
690 	 * option available to us appears to be to ask ACPI for help..
691 	 *
692 	 * It's important this check's before trying straps, one of the
693 	 * said manufacturer's laptops are configured in such a way
694 	 * the nouveau decides an entry in the VBIOS FP mode table is
695 	 * valid - it's not (rh#613284)
696 	 */
697 	if (nv_encoder->dcb->lvdsconf.use_acpi_for_edid) {
698 		edid = nouveau_acpi_edid(dev, connector);
699 		if (edid) {
700 			status = connector_status_connected;
701 			goto out;
702 		}
703 	}
704 
705 	/* If no EDID found above, and the VBIOS indicates a hardcoded
706 	 * modeline is avalilable for the panel, set it as the panel's
707 	 * native mode and exit.
708 	 */
709 	if (nouveau_bios_fp_mode(dev, NULL) && (drm->vbios.fp_no_ddc ||
710 	    nv_encoder->dcb->lvdsconf.use_straps_for_mode)) {
711 		status = connector_status_connected;
712 		goto out;
713 	}
714 
715 	/* Still nothing, some VBIOS images have a hardcoded EDID block
716 	 * stored for the panel stored in them.
717 	 */
718 	if (!drm->vbios.fp_no_ddc) {
719 		edid = (struct edid *)nouveau_bios_embedded_edid(dev);
720 		if (edid) {
721 			edid = kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
722 			if (edid)
723 				status = connector_status_connected;
724 		}
725 	}
726 
727 out:
728 #if defined(CONFIG_ACPI_BUTTON) || \
729 	(defined(CONFIG_ACPI_BUTTON_MODULE) && defined(MODULE))
730 	if (status == connector_status_connected &&
731 	    !nouveau_ignorelid && !acpi_lid_open())
732 		status = connector_status_unknown;
733 #endif
734 
735 	nouveau_connector_set_edid(nv_connector, edid);
736 	if (nv_encoder)
737 		nouveau_connector_set_encoder(connector, nv_encoder);
738 	return status;
739 }
740 
741 static void
742 nouveau_connector_force(struct drm_connector *connector)
743 {
744 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
745 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
746 	struct nouveau_encoder *nv_encoder;
747 	int type;
748 
749 	if (nv_connector->type == DCB_CONNECTOR_DVI_I) {
750 		if (connector->force == DRM_FORCE_ON_DIGITAL)
751 			type = DCB_OUTPUT_TMDS;
752 		else
753 			type = DCB_OUTPUT_ANALOG;
754 	} else
755 		type = DCB_OUTPUT_ANY;
756 
757 	nv_encoder = find_encoder(connector, type);
758 	if (!nv_encoder) {
759 		NV_ERROR(drm, "can't find encoder to force %s on!\n",
760 			 connector->name);
761 		connector->status = connector_status_disconnected;
762 		return;
763 	}
764 
765 	nouveau_connector_set_encoder(connector, nv_encoder);
766 }
767 
768 static int
769 nouveau_connector_set_property(struct drm_connector *connector,
770 			       struct drm_property *property, uint64_t value)
771 {
772 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
773 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
774 	struct nouveau_conn_atom *asyc = &nv_connector->properties_state;
775 	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
776 	int ret;
777 
778 	ret = connector->funcs->atomic_set_property(&nv_connector->base,
779 						    &asyc->state,
780 						    property, value);
781 	if (ret) {
782 		if (nv_encoder && nv_encoder->dcb->type == DCB_OUTPUT_TV)
783 			return get_slave_funcs(encoder)->set_property(
784 				encoder, connector, property, value);
785 		return ret;
786 	}
787 
788 	nv_connector->scaling_mode = asyc->scaler.mode;
789 	nv_connector->dithering_mode = asyc->dither.mode;
790 
791 	if (connector->encoder && connector->encoder->crtc) {
792 		ret = drm_crtc_helper_set_mode(connector->encoder->crtc,
793 					      &connector->encoder->crtc->mode,
794 					       connector->encoder->crtc->x,
795 					       connector->encoder->crtc->y,
796 					       NULL);
797 		if (!ret)
798 			return -EINVAL;
799 	}
800 
801 	return 0;
802 }
803 
804 struct moderec {
805 	int hdisplay;
806 	int vdisplay;
807 };
808 
809 static struct moderec scaler_modes[] = {
810 	{ 1920, 1200 },
811 	{ 1920, 1080 },
812 	{ 1680, 1050 },
813 	{ 1600, 1200 },
814 	{ 1400, 1050 },
815 	{ 1280, 1024 },
816 	{ 1280, 960 },
817 	{ 1152, 864 },
818 	{ 1024, 768 },
819 	{ 800, 600 },
820 	{ 720, 400 },
821 	{ 640, 480 },
822 	{ 640, 400 },
823 	{ 640, 350 },
824 	{}
825 };
826 
827 static int
828 nouveau_connector_scaler_modes_add(struct drm_connector *connector)
829 {
830 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
831 	struct drm_display_mode *native = nv_connector->native_mode, *m;
832 	struct drm_device *dev = connector->dev;
833 	struct moderec *mode = &scaler_modes[0];
834 	int modes = 0;
835 
836 	if (!native)
837 		return 0;
838 
839 	while (mode->hdisplay) {
840 		if (mode->hdisplay <= native->hdisplay &&
841 		    mode->vdisplay <= native->vdisplay &&
842 		    (mode->hdisplay != native->hdisplay ||
843 		     mode->vdisplay != native->vdisplay)) {
844 			m = drm_cvt_mode(dev, mode->hdisplay, mode->vdisplay,
845 					 drm_mode_vrefresh(native), false,
846 					 false, false);
847 			if (!m)
848 				continue;
849 
850 			drm_mode_probed_add(connector, m);
851 			modes++;
852 		}
853 
854 		mode++;
855 	}
856 
857 	return modes;
858 }
859 
860 static void
861 nouveau_connector_detect_depth(struct drm_connector *connector)
862 {
863 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
864 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
865 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
866 	struct nvbios *bios = &drm->vbios;
867 	struct drm_display_mode *mode = nv_connector->native_mode;
868 	bool duallink;
869 
870 	/* if the edid is feeling nice enough to provide this info, use it */
871 	if (nv_connector->edid && connector->display_info.bpc)
872 		return;
873 
874 	/* EDID 1.4 is *supposed* to be supported on eDP, but, Apple... */
875 	if (nv_connector->type == DCB_CONNECTOR_eDP) {
876 		connector->display_info.bpc = 6;
877 		return;
878 	}
879 
880 	/* we're out of options unless we're LVDS, default to 8bpc */
881 	if (nv_encoder->dcb->type != DCB_OUTPUT_LVDS) {
882 		connector->display_info.bpc = 8;
883 		return;
884 	}
885 
886 	connector->display_info.bpc = 6;
887 
888 	/* LVDS: panel straps */
889 	if (bios->fp_no_ddc) {
890 		if (bios->fp.if_is_24bit)
891 			connector->display_info.bpc = 8;
892 		return;
893 	}
894 
895 	/* LVDS: DDC panel, need to first determine the number of links to
896 	 * know which if_is_24bit flag to check...
897 	 */
898 	if (nv_connector->edid &&
899 	    nv_connector->type == DCB_CONNECTOR_LVDS_SPWG)
900 		duallink = ((u8 *)nv_connector->edid)[121] == 2;
901 	else
902 		duallink = mode->clock >= bios->fp.duallink_transition_clk;
903 
904 	if ((!duallink && (bios->fp.strapless_is_24bit & 1)) ||
905 	    ( duallink && (bios->fp.strapless_is_24bit & 2)))
906 		connector->display_info.bpc = 8;
907 }
908 
909 static int
910 nouveau_connector_late_register(struct drm_connector *connector)
911 {
912 	int ret;
913 
914 	ret = nouveau_backlight_init(connector);
915 	if (ret)
916 		return ret;
917 
918 	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
919 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
920 		ret = drm_dp_aux_register(&nouveau_connector(connector)->aux);
921 		if (ret)
922 			goto backlight_fini;
923 	}
924 
925 	return 0;
926 backlight_fini:
927 	nouveau_backlight_fini(connector);
928 	return ret;
929 }
930 
931 static void
932 nouveau_connector_early_unregister(struct drm_connector *connector)
933 {
934 	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
935 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)
936 		drm_dp_aux_unregister(&nouveau_connector(connector)->aux);
937 
938 	nouveau_backlight_fini(connector);
939 }
940 
941 static int
942 nouveau_connector_get_modes(struct drm_connector *connector)
943 {
944 	struct drm_device *dev = connector->dev;
945 	struct nouveau_drm *drm = nouveau_drm(dev);
946 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
947 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
948 	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
949 	int ret = 0;
950 
951 	/* destroy the native mode, the attached monitor could have changed.
952 	 */
953 	if (nv_connector->native_mode) {
954 		drm_mode_destroy(dev, nv_connector->native_mode);
955 		nv_connector->native_mode = NULL;
956 	}
957 
958 	if (nv_connector->edid)
959 		ret = drm_add_edid_modes(connector, nv_connector->edid);
960 	else
961 	if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS &&
962 	    (nv_encoder->dcb->lvdsconf.use_straps_for_mode ||
963 	     drm->vbios.fp_no_ddc) && nouveau_bios_fp_mode(dev, NULL)) {
964 		struct drm_display_mode mode;
965 
966 		nouveau_bios_fp_mode(dev, &mode);
967 		nv_connector->native_mode = drm_mode_duplicate(dev, &mode);
968 	}
969 
970 	/* Determine display colour depth for everything except LVDS now,
971 	 * DP requires this before mode_valid() is called.
972 	 */
973 	if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS)
974 		nouveau_connector_detect_depth(connector);
975 
976 	/* Find the native mode if this is a digital panel, if we didn't
977 	 * find any modes through DDC previously add the native mode to
978 	 * the list of modes.
979 	 */
980 	if (!nv_connector->native_mode)
981 		nv_connector->native_mode = nouveau_conn_native_mode(connector);
982 	if (ret == 0 && nv_connector->native_mode) {
983 		struct drm_display_mode *mode;
984 
985 		mode = drm_mode_duplicate(dev, nv_connector->native_mode);
986 		drm_mode_probed_add(connector, mode);
987 		ret = 1;
988 	}
989 
990 	/* Determine LVDS colour depth, must happen after determining
991 	 * "native" mode as some VBIOS tables require us to use the
992 	 * pixel clock as part of the lookup...
993 	 */
994 	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS && nv_connector->native_mode)
995 		nouveau_connector_detect_depth(connector);
996 
997 	if (nv_encoder->dcb->type == DCB_OUTPUT_TV)
998 		ret = get_slave_funcs(encoder)->get_modes(encoder, connector);
999 
1000 	if (nv_connector->type == DCB_CONNECTOR_LVDS ||
1001 	    nv_connector->type == DCB_CONNECTOR_LVDS_SPWG ||
1002 	    nv_connector->type == DCB_CONNECTOR_eDP)
1003 		ret += nouveau_connector_scaler_modes_add(connector);
1004 
1005 	return ret;
1006 }
1007 
1008 static unsigned
1009 get_tmds_link_bandwidth(struct drm_connector *connector)
1010 {
1011 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
1012 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
1013 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
1014 	struct dcb_output *dcb = nv_connector->detected_encoder->dcb;
1015 	struct drm_display_info *info = NULL;
1016 	unsigned duallink_scale =
1017 		nouveau_duallink && nv_encoder->dcb->duallink_possible ? 2 : 1;
1018 
1019 	if (drm_detect_hdmi_monitor(nv_connector->edid)) {
1020 		info = &nv_connector->base.display_info;
1021 		duallink_scale = 1;
1022 	}
1023 
1024 	if (info) {
1025 		if (nouveau_hdmimhz > 0)
1026 			return nouveau_hdmimhz * 1000;
1027 		/* Note: these limits are conservative, some Fermi's
1028 		 * can do 297 MHz. Unclear how this can be determined.
1029 		 */
1030 		if (drm->client.device.info.chipset >= 0x120) {
1031 			const int max_tmds_clock =
1032 				info->hdmi.scdc.scrambling.supported ?
1033 				594000 : 340000;
1034 			return info->max_tmds_clock ?
1035 				min(info->max_tmds_clock, max_tmds_clock) :
1036 				max_tmds_clock;
1037 		}
1038 		if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_KEPLER)
1039 			return 297000;
1040 		if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_FERMI)
1041 			return 225000;
1042 	}
1043 
1044 	if (dcb->location != DCB_LOC_ON_CHIP ||
1045 	    drm->client.device.info.chipset >= 0x46)
1046 		return 165000 * duallink_scale;
1047 	else if (drm->client.device.info.chipset >= 0x40)
1048 		return 155000 * duallink_scale;
1049 	else if (drm->client.device.info.chipset >= 0x18)
1050 		return 135000 * duallink_scale;
1051 	else
1052 		return 112000 * duallink_scale;
1053 }
1054 
1055 static enum drm_mode_status
1056 nouveau_connector_mode_valid(struct drm_connector *connector,
1057 			     struct drm_display_mode *mode)
1058 {
1059 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
1060 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
1061 	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
1062 	unsigned int min_clock = 25000, max_clock = min_clock, clock = mode->clock;
1063 
1064 	switch (nv_encoder->dcb->type) {
1065 	case DCB_OUTPUT_LVDS:
1066 		if (nv_connector->native_mode &&
1067 		    (mode->hdisplay > nv_connector->native_mode->hdisplay ||
1068 		     mode->vdisplay > nv_connector->native_mode->vdisplay))
1069 			return MODE_PANEL;
1070 
1071 		min_clock = 0;
1072 		max_clock = 400000;
1073 		break;
1074 	case DCB_OUTPUT_TMDS:
1075 		max_clock = get_tmds_link_bandwidth(connector);
1076 		break;
1077 	case DCB_OUTPUT_ANALOG:
1078 		max_clock = nv_encoder->dcb->crtconf.maxfreq;
1079 		if (!max_clock)
1080 			max_clock = 350000;
1081 		break;
1082 	case DCB_OUTPUT_TV:
1083 		return get_slave_funcs(encoder)->mode_valid(encoder, mode);
1084 	case DCB_OUTPUT_DP:
1085 		return nv50_dp_mode_valid(nv_encoder, mode, NULL);
1086 	default:
1087 		BUG();
1088 		return MODE_BAD;
1089 	}
1090 
1091 	if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
1092 		clock *= 2;
1093 
1094 	if (clock < min_clock)
1095 		return MODE_CLOCK_LOW;
1096 	if (clock > max_clock)
1097 		return MODE_CLOCK_HIGH;
1098 
1099 	return MODE_OK;
1100 }
1101 
1102 static struct drm_encoder *
1103 nouveau_connector_best_encoder(struct drm_connector *connector)
1104 {
1105 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
1106 
1107 	if (nv_connector->detected_encoder)
1108 		return to_drm_encoder(nv_connector->detected_encoder);
1109 
1110 	return NULL;
1111 }
1112 
1113 static int
1114 nouveau_connector_atomic_check(struct drm_connector *connector, struct drm_atomic_state *state)
1115 {
1116 	struct nouveau_connector *nv_conn = nouveau_connector(connector);
1117 	struct drm_connector_state *conn_state =
1118 		drm_atomic_get_new_connector_state(state, connector);
1119 
1120 	if (!nv_conn->dp_encoder || !nv50_has_mst(nouveau_drm(connector->dev)))
1121 		return 0;
1122 
1123 	return drm_dp_mst_root_conn_atomic_check(conn_state, &nv_conn->dp_encoder->dp.mstm->mgr);
1124 }
1125 
1126 static const struct drm_connector_helper_funcs
1127 nouveau_connector_helper_funcs = {
1128 	.get_modes = nouveau_connector_get_modes,
1129 	.mode_valid = nouveau_connector_mode_valid,
1130 	.best_encoder = nouveau_connector_best_encoder,
1131 	.atomic_check = nouveau_connector_atomic_check,
1132 };
1133 
1134 static const struct drm_connector_funcs
1135 nouveau_connector_funcs = {
1136 	.dpms = drm_helper_connector_dpms,
1137 	.reset = nouveau_conn_reset,
1138 	.detect = nouveau_connector_detect,
1139 	.force = nouveau_connector_force,
1140 	.fill_modes = drm_helper_probe_single_connector_modes,
1141 	.set_property = nouveau_connector_set_property,
1142 	.destroy = nouveau_connector_destroy,
1143 	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
1144 	.atomic_destroy_state = nouveau_conn_atomic_destroy_state,
1145 	.atomic_set_property = nouveau_conn_atomic_set_property,
1146 	.atomic_get_property = nouveau_conn_atomic_get_property,
1147 	.late_register = nouveau_connector_late_register,
1148 	.early_unregister = nouveau_connector_early_unregister,
1149 };
1150 
1151 static const struct drm_connector_funcs
1152 nouveau_connector_funcs_lvds = {
1153 	.dpms = drm_helper_connector_dpms,
1154 	.reset = nouveau_conn_reset,
1155 	.detect = nouveau_connector_detect_lvds,
1156 	.force = nouveau_connector_force,
1157 	.fill_modes = drm_helper_probe_single_connector_modes,
1158 	.set_property = nouveau_connector_set_property,
1159 	.destroy = nouveau_connector_destroy,
1160 	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
1161 	.atomic_destroy_state = nouveau_conn_atomic_destroy_state,
1162 	.atomic_set_property = nouveau_conn_atomic_set_property,
1163 	.atomic_get_property = nouveau_conn_atomic_get_property,
1164 	.late_register = nouveau_connector_late_register,
1165 	.early_unregister = nouveau_connector_early_unregister,
1166 };
1167 
1168 void
1169 nouveau_connector_hpd(struct nouveau_connector *nv_connector, u64 bits)
1170 {
1171 	struct nouveau_drm *drm = nouveau_drm(nv_connector->base.dev);
1172 	u32 mask = drm_connector_mask(&nv_connector->base);
1173 	unsigned long flags;
1174 
1175 	spin_lock_irqsave(&drm->hpd_lock, flags);
1176 	if (!(drm->hpd_pending & mask)) {
1177 		nv_connector->hpd_pending |= bits;
1178 		drm->hpd_pending |= mask;
1179 		schedule_work(&drm->hpd_work);
1180 	}
1181 	spin_unlock_irqrestore(&drm->hpd_lock, flags);
1182 }
1183 
1184 static int
1185 nouveau_connector_irq(struct nvif_event *event, void *repv, u32 repc)
1186 {
1187 	struct nouveau_connector *nv_connector = container_of(event, typeof(*nv_connector), irq);
1188 
1189 	schedule_work(&nv_connector->irq_work);
1190 	return NVIF_EVENT_KEEP;
1191 }
1192 
1193 static int
1194 nouveau_connector_hotplug(struct nvif_event *event, void *repv, u32 repc)
1195 {
1196 	struct nouveau_connector *nv_connector = container_of(event, typeof(*nv_connector), hpd);
1197 	struct nvif_conn_event_v0 *rep = repv;
1198 
1199 	nouveau_connector_hpd(nv_connector, rep->types);
1200 	return NVIF_EVENT_KEEP;
1201 }
1202 
1203 static ssize_t
1204 nouveau_connector_aux_xfer(struct drm_dp_aux *obj, struct drm_dp_aux_msg *msg)
1205 {
1206 	struct nouveau_connector *nv_connector =
1207 		container_of(obj, typeof(*nv_connector), aux);
1208 	struct nouveau_encoder *nv_encoder;
1209 	struct nvkm_i2c_aux *aux;
1210 	u8 size = msg->size;
1211 	int ret;
1212 
1213 	nv_encoder = find_encoder(&nv_connector->base, DCB_OUTPUT_DP);
1214 	if (!nv_encoder || !(aux = nv_encoder->aux))
1215 		return -ENODEV;
1216 	if (WARN_ON(msg->size > 16))
1217 		return -E2BIG;
1218 
1219 	ret = nvkm_i2c_aux_acquire(aux);
1220 	if (ret)
1221 		return ret;
1222 
1223 	ret = nvkm_i2c_aux_xfer(aux, false, msg->request, msg->address,
1224 				msg->buffer, &size);
1225 	nvkm_i2c_aux_release(aux);
1226 	if (ret >= 0) {
1227 		msg->reply = ret;
1228 		return size;
1229 	}
1230 
1231 	return ret;
1232 }
1233 
1234 static int
1235 drm_conntype_from_dcb(enum dcb_connector_type dcb)
1236 {
1237 	switch (dcb) {
1238 	case DCB_CONNECTOR_VGA      : return DRM_MODE_CONNECTOR_VGA;
1239 	case DCB_CONNECTOR_TV_0     :
1240 	case DCB_CONNECTOR_TV_1     :
1241 	case DCB_CONNECTOR_TV_3     : return DRM_MODE_CONNECTOR_TV;
1242 	case DCB_CONNECTOR_DMS59_0  :
1243 	case DCB_CONNECTOR_DMS59_1  :
1244 	case DCB_CONNECTOR_DVI_I    : return DRM_MODE_CONNECTOR_DVII;
1245 	case DCB_CONNECTOR_DVI_D    : return DRM_MODE_CONNECTOR_DVID;
1246 	case DCB_CONNECTOR_LVDS     :
1247 	case DCB_CONNECTOR_LVDS_SPWG: return DRM_MODE_CONNECTOR_LVDS;
1248 	case DCB_CONNECTOR_DMS59_DP0:
1249 	case DCB_CONNECTOR_DMS59_DP1:
1250 	case DCB_CONNECTOR_DP       :
1251 	case DCB_CONNECTOR_mDP      :
1252 	case DCB_CONNECTOR_USB_C    : return DRM_MODE_CONNECTOR_DisplayPort;
1253 	case DCB_CONNECTOR_eDP      : return DRM_MODE_CONNECTOR_eDP;
1254 	case DCB_CONNECTOR_HDMI_0   :
1255 	case DCB_CONNECTOR_HDMI_1   :
1256 	case DCB_CONNECTOR_HDMI_C   : return DRM_MODE_CONNECTOR_HDMIA;
1257 	case DCB_CONNECTOR_WFD	    : return DRM_MODE_CONNECTOR_VIRTUAL;
1258 	default:
1259 		break;
1260 	}
1261 
1262 	return DRM_MODE_CONNECTOR_Unknown;
1263 }
1264 
1265 struct drm_connector *
1266 nouveau_connector_create(struct drm_device *dev,
1267 			 const struct dcb_output *dcbe)
1268 {
1269 	const struct drm_connector_funcs *funcs = &nouveau_connector_funcs;
1270 	struct nouveau_drm *drm = nouveau_drm(dev);
1271 	struct nouveau_display *disp = nouveau_display(dev);
1272 	struct nouveau_connector *nv_connector = NULL;
1273 	struct drm_connector *connector;
1274 	struct drm_connector_list_iter conn_iter;
1275 	char aux_name[48] = {0};
1276 	int index = dcbe->connector;
1277 	int type, ret = 0;
1278 	bool dummy;
1279 
1280 	drm_connector_list_iter_begin(dev, &conn_iter);
1281 	nouveau_for_each_non_mst_connector_iter(connector, &conn_iter) {
1282 		nv_connector = nouveau_connector(connector);
1283 		if (nv_connector->index == index) {
1284 			drm_connector_list_iter_end(&conn_iter);
1285 			return connector;
1286 		}
1287 	}
1288 	drm_connector_list_iter_end(&conn_iter);
1289 
1290 	nv_connector = kzalloc(sizeof(*nv_connector), GFP_KERNEL);
1291 	if (!nv_connector)
1292 		return ERR_PTR(-ENOMEM);
1293 
1294 	connector = &nv_connector->base;
1295 	nv_connector->index = index;
1296 	INIT_WORK(&nv_connector->irq_work, nouveau_dp_irq);
1297 
1298 	/* attempt to parse vbios connector type and hotplug gpio */
1299 	nv_connector->dcb = olddcb_conn(dev, index);
1300 	if (nv_connector->dcb) {
1301 		u32 entry = ROM16(nv_connector->dcb[0]);
1302 		if (olddcb_conntab(dev)[3] >= 4)
1303 			entry |= (u32)ROM16(nv_connector->dcb[2]) << 16;
1304 
1305 		nv_connector->type = nv_connector->dcb[0];
1306 		if (drm_conntype_from_dcb(nv_connector->type) ==
1307 					  DRM_MODE_CONNECTOR_Unknown) {
1308 			NV_WARN(drm, "unknown connector type %02x\n",
1309 				nv_connector->type);
1310 			nv_connector->type = DCB_CONNECTOR_NONE;
1311 		}
1312 
1313 		/* Gigabyte NX85T */
1314 		if (nv_match_device(dev, 0x0421, 0x1458, 0x344c)) {
1315 			if (nv_connector->type == DCB_CONNECTOR_HDMI_1)
1316 				nv_connector->type = DCB_CONNECTOR_DVI_I;
1317 		}
1318 
1319 		/* Gigabyte GV-NX86T512H */
1320 		if (nv_match_device(dev, 0x0402, 0x1458, 0x3455)) {
1321 			if (nv_connector->type == DCB_CONNECTOR_HDMI_1)
1322 				nv_connector->type = DCB_CONNECTOR_DVI_I;
1323 		}
1324 	} else {
1325 		nv_connector->type = DCB_CONNECTOR_NONE;
1326 	}
1327 
1328 	/* no vbios data, or an unknown dcb connector type - attempt to
1329 	 * figure out something suitable ourselves
1330 	 */
1331 	if (nv_connector->type == DCB_CONNECTOR_NONE) {
1332 		struct nouveau_drm *drm = nouveau_drm(dev);
1333 		struct dcb_table *dcbt = &drm->vbios.dcb;
1334 		u32 encoders = 0;
1335 		int i;
1336 
1337 		for (i = 0; i < dcbt->entries; i++) {
1338 			if (dcbt->entry[i].connector == nv_connector->index)
1339 				encoders |= (1 << dcbt->entry[i].type);
1340 		}
1341 
1342 		if (encoders & (1 << DCB_OUTPUT_DP)) {
1343 			if (encoders & (1 << DCB_OUTPUT_TMDS))
1344 				nv_connector->type = DCB_CONNECTOR_DP;
1345 			else
1346 				nv_connector->type = DCB_CONNECTOR_eDP;
1347 		} else
1348 		if (encoders & (1 << DCB_OUTPUT_TMDS)) {
1349 			if (encoders & (1 << DCB_OUTPUT_ANALOG))
1350 				nv_connector->type = DCB_CONNECTOR_DVI_I;
1351 			else
1352 				nv_connector->type = DCB_CONNECTOR_DVI_D;
1353 		} else
1354 		if (encoders & (1 << DCB_OUTPUT_ANALOG)) {
1355 			nv_connector->type = DCB_CONNECTOR_VGA;
1356 		} else
1357 		if (encoders & (1 << DCB_OUTPUT_LVDS)) {
1358 			nv_connector->type = DCB_CONNECTOR_LVDS;
1359 		} else
1360 		if (encoders & (1 << DCB_OUTPUT_TV)) {
1361 			nv_connector->type = DCB_CONNECTOR_TV_0;
1362 		}
1363 	}
1364 
1365 	switch ((type = drm_conntype_from_dcb(nv_connector->type))) {
1366 	case DRM_MODE_CONNECTOR_LVDS:
1367 		ret = nouveau_bios_parse_lvds_table(dev, 0, &dummy, &dummy);
1368 		if (ret) {
1369 			NV_ERROR(drm, "Error parsing LVDS table, disabling\n");
1370 			kfree(nv_connector);
1371 			return ERR_PTR(ret);
1372 		}
1373 
1374 		funcs = &nouveau_connector_funcs_lvds;
1375 		break;
1376 	case DRM_MODE_CONNECTOR_DisplayPort:
1377 	case DRM_MODE_CONNECTOR_eDP:
1378 		nv_connector->aux.dev = connector->kdev;
1379 		nv_connector->aux.drm_dev = dev;
1380 		nv_connector->aux.transfer = nouveau_connector_aux_xfer;
1381 		snprintf(aux_name, sizeof(aux_name), "sor-%04x-%04x",
1382 			 dcbe->hasht, dcbe->hashm);
1383 		nv_connector->aux.name = kstrdup(aux_name, GFP_KERNEL);
1384 		if (!nv_connector->aux.name) {
1385 			kfree(nv_connector);
1386 			return ERR_PTR(-ENOMEM);
1387 		}
1388 		drm_dp_aux_init(&nv_connector->aux);
1389 		break;
1390 	default:
1391 		funcs = &nouveau_connector_funcs;
1392 		break;
1393 	}
1394 
1395 	/* HDMI 3D support */
1396 	if ((disp->disp.object.oclass >= G82_DISP)
1397 	    && ((type == DRM_MODE_CONNECTOR_DisplayPort)
1398 		|| (type == DRM_MODE_CONNECTOR_eDP)
1399 		|| (type == DRM_MODE_CONNECTOR_HDMIA)))
1400 		connector->stereo_allowed = true;
1401 
1402 	/* defaults, will get overridden in detect() */
1403 	connector->interlace_allowed = false;
1404 	connector->doublescan_allowed = false;
1405 
1406 	drm_connector_init(dev, connector, funcs, type);
1407 	drm_connector_helper_add(connector, &nouveau_connector_helper_funcs);
1408 	connector->polled = DRM_CONNECTOR_POLL_CONNECT;
1409 
1410 	if (nv_connector->dcb && (disp->disp.conn_mask & BIT(nv_connector->index))) {
1411 		ret = nvif_conn_ctor(&disp->disp, nv_connector->base.name, nv_connector->index,
1412 				     &nv_connector->conn);
1413 		if (ret) {
1414 			goto drm_conn_err;
1415 		}
1416 
1417 		ret = nvif_conn_event_ctor(&nv_connector->conn, "kmsHotplug",
1418 					   nouveau_connector_hotplug,
1419 					   NVIF_CONN_EVENT_V0_PLUG | NVIF_CONN_EVENT_V0_UNPLUG,
1420 					   &nv_connector->hpd);
1421 		if (ret == 0)
1422 			connector->polled = DRM_CONNECTOR_POLL_HPD;
1423 
1424 		if (nv_connector->aux.transfer) {
1425 			ret = nvif_conn_event_ctor(&nv_connector->conn, "kmsDpIrq",
1426 						   nouveau_connector_irq, NVIF_CONN_EVENT_V0_IRQ,
1427 						   &nv_connector->irq);
1428 			if (ret) {
1429 				nvif_event_dtor(&nv_connector->hpd);
1430 				nvif_conn_dtor(&nv_connector->conn);
1431 				goto drm_conn_err;
1432 			}
1433 		}
1434 	}
1435 
1436 	connector->funcs->reset(connector);
1437 	nouveau_conn_attach_properties(connector);
1438 
1439 	/* Default scaling mode */
1440 	switch (nv_connector->type) {
1441 	case DCB_CONNECTOR_LVDS:
1442 	case DCB_CONNECTOR_LVDS_SPWG:
1443 	case DCB_CONNECTOR_eDP:
1444 		/* see note in nouveau_connector_set_property() */
1445 		if (disp->disp.object.oclass < NV50_DISP) {
1446 			nv_connector->scaling_mode = DRM_MODE_SCALE_FULLSCREEN;
1447 			break;
1448 		}
1449 		nv_connector->scaling_mode = DRM_MODE_SCALE_NONE;
1450 		break;
1451 	default:
1452 		nv_connector->scaling_mode = DRM_MODE_SCALE_NONE;
1453 		break;
1454 	}
1455 
1456 	/* dithering properties */
1457 	switch (nv_connector->type) {
1458 	case DCB_CONNECTOR_TV_0:
1459 	case DCB_CONNECTOR_TV_1:
1460 	case DCB_CONNECTOR_TV_3:
1461 	case DCB_CONNECTOR_VGA:
1462 		break;
1463 	default:
1464 		nv_connector->dithering_mode = DITHERING_MODE_AUTO;
1465 		break;
1466 	}
1467 
1468 	switch (type) {
1469 	case DRM_MODE_CONNECTOR_DisplayPort:
1470 		nv_connector->dp_encoder = find_encoder(&nv_connector->base, DCB_OUTPUT_DP);
1471 		fallthrough;
1472 	case DRM_MODE_CONNECTOR_eDP:
1473 		drm_dp_cec_register_connector(&nv_connector->aux, connector);
1474 		break;
1475 	}
1476 
1477 	drm_connector_register(connector);
1478 	return connector;
1479 
1480 drm_conn_err:
1481 	drm_connector_cleanup(connector);
1482 	kfree(nv_connector);
1483 	return ERR_PTR(ret);
1484 }
1485