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/cl0046.h>
51 #include <nvif/event.h>
52 
53 struct drm_display_mode *
54 nouveau_conn_native_mode(struct drm_connector *connector)
55 {
56 	const struct drm_connector_helper_funcs *helper = connector->helper_private;
57 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
58 	struct drm_device *dev = connector->dev;
59 	struct drm_display_mode *mode, *largest = NULL;
60 	int high_w = 0, high_h = 0, high_v = 0;
61 
62 	list_for_each_entry(mode, &connector->probed_modes, head) {
63 		if (helper->mode_valid(connector, mode) != MODE_OK ||
64 		    (mode->flags & DRM_MODE_FLAG_INTERLACE))
65 			continue;
66 
67 		/* Use preferred mode if there is one.. */
68 		if (mode->type & DRM_MODE_TYPE_PREFERRED) {
69 			NV_DEBUG(drm, "native mode from preferred\n");
70 			return drm_mode_duplicate(dev, mode);
71 		}
72 
73 		/* Otherwise, take the resolution with the largest width, then
74 		 * height, then vertical refresh
75 		 */
76 		if (mode->hdisplay < high_w)
77 			continue;
78 
79 		if (mode->hdisplay == high_w && mode->vdisplay < high_h)
80 			continue;
81 
82 		if (mode->hdisplay == high_w && mode->vdisplay == high_h &&
83 		    drm_mode_vrefresh(mode) < high_v)
84 			continue;
85 
86 		high_w = mode->hdisplay;
87 		high_h = mode->vdisplay;
88 		high_v = drm_mode_vrefresh(mode);
89 		largest = mode;
90 	}
91 
92 	NV_DEBUG(drm, "native mode from largest: %dx%d@%d\n",
93 		      high_w, high_h, high_v);
94 	return largest ? drm_mode_duplicate(dev, largest) : NULL;
95 }
96 
97 int
98 nouveau_conn_atomic_get_property(struct drm_connector *connector,
99 				 const struct drm_connector_state *state,
100 				 struct drm_property *property, u64 *val)
101 {
102 	struct nouveau_conn_atom *asyc = nouveau_conn_atom(state);
103 	struct nouveau_display *disp = nouveau_display(connector->dev);
104 	struct drm_device *dev = connector->dev;
105 
106 	if (property == dev->mode_config.scaling_mode_property)
107 		*val = asyc->scaler.mode;
108 	else if (property == disp->underscan_property)
109 		*val = asyc->scaler.underscan.mode;
110 	else if (property == disp->underscan_hborder_property)
111 		*val = asyc->scaler.underscan.hborder;
112 	else if (property == disp->underscan_vborder_property)
113 		*val = asyc->scaler.underscan.vborder;
114 	else if (property == disp->dithering_mode)
115 		*val = asyc->dither.mode;
116 	else if (property == disp->dithering_depth)
117 		*val = asyc->dither.depth;
118 	else if (property == disp->vibrant_hue_property)
119 		*val = asyc->procamp.vibrant_hue;
120 	else if (property == disp->color_vibrance_property)
121 		*val = asyc->procamp.color_vibrance;
122 	else
123 		return -EINVAL;
124 
125 	return 0;
126 }
127 
128 int
129 nouveau_conn_atomic_set_property(struct drm_connector *connector,
130 				 struct drm_connector_state *state,
131 				 struct drm_property *property, u64 val)
132 {
133 	struct drm_device *dev = connector->dev;
134 	struct nouveau_conn_atom *asyc = nouveau_conn_atom(state);
135 	struct nouveau_display *disp = nouveau_display(dev);
136 
137 	if (property == dev->mode_config.scaling_mode_property) {
138 		switch (val) {
139 		case DRM_MODE_SCALE_NONE:
140 			/* We allow 'None' for EDID modes, even on a fixed
141 			 * panel (some exist with support for lower refresh
142 			 * rates, which people might want to use for power-
143 			 * saving purposes).
144 			 *
145 			 * Non-EDID modes will force the use of GPU scaling
146 			 * to the native mode regardless of this setting.
147 			 */
148 			switch (connector->connector_type) {
149 			case DRM_MODE_CONNECTOR_LVDS:
150 			case DRM_MODE_CONNECTOR_eDP:
151 				/* ... except prior to G80, where the code
152 				 * doesn't support such things.
153 				 */
154 				if (disp->disp.object.oclass < NV50_DISP)
155 					return -EINVAL;
156 				break;
157 			default:
158 				break;
159 			}
160 			break;
161 		case DRM_MODE_SCALE_FULLSCREEN:
162 		case DRM_MODE_SCALE_CENTER:
163 		case DRM_MODE_SCALE_ASPECT:
164 			break;
165 		default:
166 			return -EINVAL;
167 		}
168 
169 		if (asyc->scaler.mode != val) {
170 			asyc->scaler.mode = val;
171 			asyc->set.scaler = true;
172 		}
173 	} else
174 	if (property == disp->underscan_property) {
175 		if (asyc->scaler.underscan.mode != val) {
176 			asyc->scaler.underscan.mode = val;
177 			asyc->set.scaler = true;
178 		}
179 	} else
180 	if (property == disp->underscan_hborder_property) {
181 		if (asyc->scaler.underscan.hborder != val) {
182 			asyc->scaler.underscan.hborder = val;
183 			asyc->set.scaler = true;
184 		}
185 	} else
186 	if (property == disp->underscan_vborder_property) {
187 		if (asyc->scaler.underscan.vborder != val) {
188 			asyc->scaler.underscan.vborder = val;
189 			asyc->set.scaler = true;
190 		}
191 	} else
192 	if (property == disp->dithering_mode) {
193 		if (asyc->dither.mode != val) {
194 			asyc->dither.mode = val;
195 			asyc->set.dither = true;
196 		}
197 	} else
198 	if (property == disp->dithering_depth) {
199 		if (asyc->dither.mode != val) {
200 			asyc->dither.depth = val;
201 			asyc->set.dither = true;
202 		}
203 	} else
204 	if (property == disp->vibrant_hue_property) {
205 		if (asyc->procamp.vibrant_hue != val) {
206 			asyc->procamp.vibrant_hue = val;
207 			asyc->set.procamp = true;
208 		}
209 	} else
210 	if (property == disp->color_vibrance_property) {
211 		if (asyc->procamp.color_vibrance != val) {
212 			asyc->procamp.color_vibrance = val;
213 			asyc->set.procamp = true;
214 		}
215 	} else {
216 		return -EINVAL;
217 	}
218 
219 	return 0;
220 }
221 
222 void
223 nouveau_conn_atomic_destroy_state(struct drm_connector *connector,
224 				  struct drm_connector_state *state)
225 {
226 	struct nouveau_conn_atom *asyc = nouveau_conn_atom(state);
227 	__drm_atomic_helper_connector_destroy_state(&asyc->state);
228 	kfree(asyc);
229 }
230 
231 struct drm_connector_state *
232 nouveau_conn_atomic_duplicate_state(struct drm_connector *connector)
233 {
234 	struct nouveau_conn_atom *armc = nouveau_conn_atom(connector->state);
235 	struct nouveau_conn_atom *asyc;
236 	if (!(asyc = kmalloc(sizeof(*asyc), GFP_KERNEL)))
237 		return NULL;
238 	__drm_atomic_helper_connector_duplicate_state(connector, &asyc->state);
239 	asyc->dither = armc->dither;
240 	asyc->scaler = armc->scaler;
241 	asyc->procamp = armc->procamp;
242 	asyc->set.mask = 0;
243 	return &asyc->state;
244 }
245 
246 void
247 nouveau_conn_reset(struct drm_connector *connector)
248 {
249 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
250 	struct nouveau_conn_atom *asyc;
251 
252 	if (drm_drv_uses_atomic_modeset(connector->dev)) {
253 		if (WARN_ON(!(asyc = kzalloc(sizeof(*asyc), GFP_KERNEL))))
254 			return;
255 
256 		if (connector->state)
257 			nouveau_conn_atomic_destroy_state(connector,
258 							  connector->state);
259 
260 		__drm_atomic_helper_connector_reset(connector, &asyc->state);
261 	} else {
262 		asyc = &nv_connector->properties_state;
263 	}
264 
265 	asyc->dither.mode = DITHERING_MODE_AUTO;
266 	asyc->dither.depth = DITHERING_DEPTH_AUTO;
267 	asyc->scaler.mode = DRM_MODE_SCALE_NONE;
268 	asyc->scaler.underscan.mode = UNDERSCAN_OFF;
269 	asyc->procamp.color_vibrance = 150;
270 	asyc->procamp.vibrant_hue = 90;
271 
272 	if (nouveau_display(connector->dev)->disp.object.oclass < NV50_DISP) {
273 		switch (connector->connector_type) {
274 		case DRM_MODE_CONNECTOR_LVDS:
275 			/* See note in nouveau_conn_atomic_set_property(). */
276 			asyc->scaler.mode = DRM_MODE_SCALE_FULLSCREEN;
277 			break;
278 		default:
279 			break;
280 		}
281 	}
282 }
283 
284 void
285 nouveau_conn_attach_properties(struct drm_connector *connector)
286 {
287 	struct drm_device *dev = connector->dev;
288 	struct nouveau_display *disp = nouveau_display(dev);
289 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
290 	struct nouveau_conn_atom *armc;
291 
292 	if (drm_drv_uses_atomic_modeset(connector->dev))
293 		armc = nouveau_conn_atom(connector->state);
294 	else
295 		armc = &nv_connector->properties_state;
296 
297 	/* Init DVI-I specific properties. */
298 	if (connector->connector_type == DRM_MODE_CONNECTOR_DVII)
299 		drm_object_attach_property(&connector->base, dev->mode_config.
300 					   dvi_i_subconnector_property, 0);
301 
302 	/* Add overscan compensation options to digital outputs. */
303 	if (disp->underscan_property &&
304 	    (connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
305 	     connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
306 	     connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
307 	     connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)) {
308 		drm_object_attach_property(&connector->base,
309 					   disp->underscan_property,
310 					   UNDERSCAN_OFF);
311 		drm_object_attach_property(&connector->base,
312 					   disp->underscan_hborder_property, 0);
313 		drm_object_attach_property(&connector->base,
314 					   disp->underscan_vborder_property, 0);
315 	}
316 
317 	/* Add hue and saturation options. */
318 	if (disp->vibrant_hue_property)
319 		drm_object_attach_property(&connector->base,
320 					   disp->vibrant_hue_property,
321 					   armc->procamp.vibrant_hue);
322 	if (disp->color_vibrance_property)
323 		drm_object_attach_property(&connector->base,
324 					   disp->color_vibrance_property,
325 					   armc->procamp.color_vibrance);
326 
327 	/* Scaling mode property. */
328 	switch (connector->connector_type) {
329 	case DRM_MODE_CONNECTOR_TV:
330 		break;
331 	case DRM_MODE_CONNECTOR_VGA:
332 		if (disp->disp.object.oclass < NV50_DISP)
333 			break; /* Can only scale on DFPs. */
334 		fallthrough;
335 	default:
336 		drm_object_attach_property(&connector->base, dev->mode_config.
337 					   scaling_mode_property,
338 					   armc->scaler.mode);
339 		break;
340 	}
341 
342 	/* Dithering properties. */
343 	switch (connector->connector_type) {
344 	case DRM_MODE_CONNECTOR_TV:
345 	case DRM_MODE_CONNECTOR_VGA:
346 		break;
347 	default:
348 		if (disp->dithering_mode) {
349 			drm_object_attach_property(&connector->base,
350 						   disp->dithering_mode,
351 						   armc->dither.mode);
352 		}
353 		if (disp->dithering_depth) {
354 			drm_object_attach_property(&connector->base,
355 						   disp->dithering_depth,
356 						   armc->dither.depth);
357 		}
358 		break;
359 	}
360 }
361 
362 MODULE_PARM_DESC(tv_disable, "Disable TV-out detection");
363 int nouveau_tv_disable = 0;
364 module_param_named(tv_disable, nouveau_tv_disable, int, 0400);
365 
366 MODULE_PARM_DESC(ignorelid, "Ignore ACPI lid status");
367 int nouveau_ignorelid = 0;
368 module_param_named(ignorelid, nouveau_ignorelid, int, 0400);
369 
370 MODULE_PARM_DESC(duallink, "Allow dual-link TMDS (default: enabled)");
371 int nouveau_duallink = 1;
372 module_param_named(duallink, nouveau_duallink, int, 0400);
373 
374 MODULE_PARM_DESC(hdmimhz, "Force a maximum HDMI pixel clock (in MHz)");
375 int nouveau_hdmimhz = 0;
376 module_param_named(hdmimhz, nouveau_hdmimhz, int, 0400);
377 
378 struct nouveau_encoder *
379 find_encoder(struct drm_connector *connector, int type)
380 {
381 	struct nouveau_encoder *nv_encoder;
382 	struct drm_encoder *enc;
383 
384 	drm_connector_for_each_possible_encoder(connector, enc) {
385 		nv_encoder = nouveau_encoder(enc);
386 
387 		if (type == DCB_OUTPUT_ANY ||
388 		    (nv_encoder->dcb && nv_encoder->dcb->type == type))
389 			return nv_encoder;
390 	}
391 
392 	return NULL;
393 }
394 
395 static void
396 nouveau_connector_destroy(struct drm_connector *connector)
397 {
398 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
399 	nvif_notify_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 = true;
508 		connector->doublescan_allowed = true;
509 	} else
510 	if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS ||
511 	    nv_encoder->dcb->type == DCB_OUTPUT_TMDS) {
512 		connector->doublescan_allowed = false;
513 		connector->interlace_allowed = false;
514 	} else {
515 		connector->doublescan_allowed = true;
516 		if (drm->client.device.info.family == NV_DEVICE_INFO_V0_KELVIN ||
517 		    (drm->client.device.info.family == NV_DEVICE_INFO_V0_CELSIUS &&
518 		     (pdev->device & 0x0ff0) != 0x0100 &&
519 		     (pdev->device & 0x0ff0) != 0x0150))
520 			/* HW is broken */
521 			connector->interlace_allowed = false;
522 		else
523 			connector->interlace_allowed = true;
524 	}
525 
526 	if (nv_connector->type == DCB_CONNECTOR_DVI_I) {
527 		drm_object_property_set_value(&connector->base,
528 			dev->mode_config.dvi_i_subconnector_property,
529 			nv_encoder->dcb->type == DCB_OUTPUT_TMDS ?
530 			DRM_MODE_SUBCONNECTOR_DVID :
531 			DRM_MODE_SUBCONNECTOR_DVIA);
532 	}
533 }
534 
535 static void
536 nouveau_connector_set_edid(struct nouveau_connector *nv_connector,
537 			   struct edid *edid)
538 {
539 	if (nv_connector->edid != edid) {
540 		struct edid *old_edid = nv_connector->edid;
541 
542 		drm_connector_update_edid_property(&nv_connector->base, edid);
543 		kfree(old_edid);
544 		nv_connector->edid = edid;
545 	}
546 }
547 
548 static enum drm_connector_status
549 nouveau_connector_detect(struct drm_connector *connector, bool force)
550 {
551 	struct drm_device *dev = connector->dev;
552 	struct nouveau_drm *drm = nouveau_drm(dev);
553 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
554 	struct nouveau_encoder *nv_encoder = NULL;
555 	struct nouveau_encoder *nv_partner;
556 	struct i2c_adapter *i2c;
557 	int type;
558 	int ret;
559 	enum drm_connector_status conn_status = connector_status_disconnected;
560 
561 	/* Outputs are only polled while runtime active, so resuming the
562 	 * device here is unnecessary (and would deadlock upon runtime suspend
563 	 * because it waits for polling to finish). We do however, want to
564 	 * prevent the autosuspend timer from elapsing during this operation
565 	 * if possible.
566 	 */
567 	if (drm_kms_helper_is_poll_worker()) {
568 		pm_runtime_get_noresume(dev->dev);
569 	} else {
570 		ret = pm_runtime_get_sync(dev->dev);
571 		if (ret < 0 && ret != -EACCES) {
572 			pm_runtime_put_autosuspend(dev->dev);
573 			nouveau_connector_set_edid(nv_connector, NULL);
574 			return conn_status;
575 		}
576 	}
577 
578 	nv_encoder = nouveau_connector_ddc_detect(connector);
579 	if (nv_encoder && (i2c = nv_encoder->i2c) != NULL) {
580 		struct edid *new_edid;
581 
582 		if ((vga_switcheroo_handler_flags() &
583 		     VGA_SWITCHEROO_CAN_SWITCH_DDC) &&
584 		    nv_connector->type == DCB_CONNECTOR_LVDS)
585 			new_edid = drm_get_edid_switcheroo(connector, i2c);
586 		else
587 			new_edid = drm_get_edid(connector, i2c);
588 
589 		nouveau_connector_set_edid(nv_connector, new_edid);
590 		if (!nv_connector->edid) {
591 			NV_ERROR(drm, "DDC responded, but no EDID for %s\n",
592 				 connector->name);
593 			goto detect_analog;
594 		}
595 
596 		/* Override encoder type for DVI-I based on whether EDID
597 		 * says the display is digital or analog, both use the
598 		 * same i2c channel so the value returned from ddc_detect
599 		 * isn't necessarily correct.
600 		 */
601 		nv_partner = NULL;
602 		if (nv_encoder->dcb->type == DCB_OUTPUT_TMDS)
603 			nv_partner = find_encoder(connector, DCB_OUTPUT_ANALOG);
604 		if (nv_encoder->dcb->type == DCB_OUTPUT_ANALOG)
605 			nv_partner = find_encoder(connector, DCB_OUTPUT_TMDS);
606 
607 		if (nv_partner && ((nv_encoder->dcb->type == DCB_OUTPUT_ANALOG &&
608 				    nv_partner->dcb->type == DCB_OUTPUT_TMDS) ||
609 				   (nv_encoder->dcb->type == DCB_OUTPUT_TMDS &&
610 				    nv_partner->dcb->type == DCB_OUTPUT_ANALOG))) {
611 			if (nv_connector->edid->input & DRM_EDID_INPUT_DIGITAL)
612 				type = DCB_OUTPUT_TMDS;
613 			else
614 				type = DCB_OUTPUT_ANALOG;
615 
616 			nv_encoder = find_encoder(connector, type);
617 		}
618 
619 		nouveau_connector_set_encoder(connector, nv_encoder);
620 		conn_status = connector_status_connected;
621 		drm_dp_cec_set_edid(&nv_connector->aux, nv_connector->edid);
622 		goto out;
623 	} else {
624 		nouveau_connector_set_edid(nv_connector, NULL);
625 	}
626 
627 	nv_encoder = nouveau_connector_of_detect(connector);
628 	if (nv_encoder) {
629 		nouveau_connector_set_encoder(connector, nv_encoder);
630 		conn_status = connector_status_connected;
631 		goto out;
632 	}
633 
634 detect_analog:
635 	nv_encoder = find_encoder(connector, DCB_OUTPUT_ANALOG);
636 	if (!nv_encoder && !nouveau_tv_disable)
637 		nv_encoder = find_encoder(connector, DCB_OUTPUT_TV);
638 	if (nv_encoder && force) {
639 		struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
640 		const struct drm_encoder_helper_funcs *helper =
641 						encoder->helper_private;
642 
643 		if (helper->detect(encoder, connector) ==
644 						connector_status_connected) {
645 			nouveau_connector_set_encoder(connector, nv_encoder);
646 			conn_status = connector_status_connected;
647 			goto out;
648 		}
649 	}
650 
651  out:
652 	if (!nv_connector->edid)
653 		drm_dp_cec_unset_edid(&nv_connector->aux);
654 
655 	pm_runtime_mark_last_busy(dev->dev);
656 	pm_runtime_put_autosuspend(dev->dev);
657 
658 	return conn_status;
659 }
660 
661 static enum drm_connector_status
662 nouveau_connector_detect_lvds(struct drm_connector *connector, bool force)
663 {
664 	struct drm_device *dev = connector->dev;
665 	struct nouveau_drm *drm = nouveau_drm(dev);
666 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
667 	struct nouveau_encoder *nv_encoder = NULL;
668 	struct edid *edid = NULL;
669 	enum drm_connector_status status = connector_status_disconnected;
670 
671 	nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
672 	if (!nv_encoder)
673 		goto out;
674 
675 	/* Try retrieving EDID via DDC */
676 	if (!drm->vbios.fp_no_ddc) {
677 		status = nouveau_connector_detect(connector, force);
678 		if (status == connector_status_connected) {
679 			edid = nv_connector->edid;
680 			goto out;
681 		}
682 	}
683 
684 	/* On some laptops (Sony, i'm looking at you) there appears to
685 	 * be no direct way of accessing the panel's EDID.  The only
686 	 * option available to us appears to be to ask ACPI for help..
687 	 *
688 	 * It's important this check's before trying straps, one of the
689 	 * said manufacturer's laptops are configured in such a way
690 	 * the nouveau decides an entry in the VBIOS FP mode table is
691 	 * valid - it's not (rh#613284)
692 	 */
693 	if (nv_encoder->dcb->lvdsconf.use_acpi_for_edid) {
694 		edid = nouveau_acpi_edid(dev, connector);
695 		if (edid) {
696 			status = connector_status_connected;
697 			goto out;
698 		}
699 	}
700 
701 	/* If no EDID found above, and the VBIOS indicates a hardcoded
702 	 * modeline is avalilable for the panel, set it as the panel's
703 	 * native mode and exit.
704 	 */
705 	if (nouveau_bios_fp_mode(dev, NULL) && (drm->vbios.fp_no_ddc ||
706 	    nv_encoder->dcb->lvdsconf.use_straps_for_mode)) {
707 		status = connector_status_connected;
708 		goto out;
709 	}
710 
711 	/* Still nothing, some VBIOS images have a hardcoded EDID block
712 	 * stored for the panel stored in them.
713 	 */
714 	if (!drm->vbios.fp_no_ddc) {
715 		edid = (struct edid *)nouveau_bios_embedded_edid(dev);
716 		if (edid) {
717 			edid = kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
718 			if (edid)
719 				status = connector_status_connected;
720 		}
721 	}
722 
723 out:
724 #if defined(CONFIG_ACPI_BUTTON) || \
725 	(defined(CONFIG_ACPI_BUTTON_MODULE) && defined(MODULE))
726 	if (status == connector_status_connected &&
727 	    !nouveau_ignorelid && !acpi_lid_open())
728 		status = connector_status_unknown;
729 #endif
730 
731 	nouveau_connector_set_edid(nv_connector, edid);
732 	nouveau_connector_set_encoder(connector, nv_encoder);
733 	return status;
734 }
735 
736 static void
737 nouveau_connector_force(struct drm_connector *connector)
738 {
739 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
740 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
741 	struct nouveau_encoder *nv_encoder;
742 	int type;
743 
744 	if (nv_connector->type == DCB_CONNECTOR_DVI_I) {
745 		if (connector->force == DRM_FORCE_ON_DIGITAL)
746 			type = DCB_OUTPUT_TMDS;
747 		else
748 			type = DCB_OUTPUT_ANALOG;
749 	} else
750 		type = DCB_OUTPUT_ANY;
751 
752 	nv_encoder = find_encoder(connector, type);
753 	if (!nv_encoder) {
754 		NV_ERROR(drm, "can't find encoder to force %s on!\n",
755 			 connector->name);
756 		connector->status = connector_status_disconnected;
757 		return;
758 	}
759 
760 	nouveau_connector_set_encoder(connector, nv_encoder);
761 }
762 
763 static int
764 nouveau_connector_set_property(struct drm_connector *connector,
765 			       struct drm_property *property, uint64_t value)
766 {
767 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
768 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
769 	struct nouveau_conn_atom *asyc = &nv_connector->properties_state;
770 	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
771 	int ret;
772 
773 	ret = connector->funcs->atomic_set_property(&nv_connector->base,
774 						    &asyc->state,
775 						    property, value);
776 	if (ret) {
777 		if (nv_encoder && nv_encoder->dcb->type == DCB_OUTPUT_TV)
778 			return get_slave_funcs(encoder)->set_property(
779 				encoder, connector, property, value);
780 		return ret;
781 	}
782 
783 	nv_connector->scaling_mode = asyc->scaler.mode;
784 	nv_connector->dithering_mode = asyc->dither.mode;
785 
786 	if (connector->encoder && connector->encoder->crtc) {
787 		ret = drm_crtc_helper_set_mode(connector->encoder->crtc,
788 					      &connector->encoder->crtc->mode,
789 					       connector->encoder->crtc->x,
790 					       connector->encoder->crtc->y,
791 					       NULL);
792 		if (!ret)
793 			return -EINVAL;
794 	}
795 
796 	return 0;
797 }
798 
799 struct moderec {
800 	int hdisplay;
801 	int vdisplay;
802 };
803 
804 static struct moderec scaler_modes[] = {
805 	{ 1920, 1200 },
806 	{ 1920, 1080 },
807 	{ 1680, 1050 },
808 	{ 1600, 1200 },
809 	{ 1400, 1050 },
810 	{ 1280, 1024 },
811 	{ 1280, 960 },
812 	{ 1152, 864 },
813 	{ 1024, 768 },
814 	{ 800, 600 },
815 	{ 720, 400 },
816 	{ 640, 480 },
817 	{ 640, 400 },
818 	{ 640, 350 },
819 	{}
820 };
821 
822 static int
823 nouveau_connector_scaler_modes_add(struct drm_connector *connector)
824 {
825 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
826 	struct drm_display_mode *native = nv_connector->native_mode, *m;
827 	struct drm_device *dev = connector->dev;
828 	struct moderec *mode = &scaler_modes[0];
829 	int modes = 0;
830 
831 	if (!native)
832 		return 0;
833 
834 	while (mode->hdisplay) {
835 		if (mode->hdisplay <= native->hdisplay &&
836 		    mode->vdisplay <= native->vdisplay &&
837 		    (mode->hdisplay != native->hdisplay ||
838 		     mode->vdisplay != native->vdisplay)) {
839 			m = drm_cvt_mode(dev, mode->hdisplay, mode->vdisplay,
840 					 drm_mode_vrefresh(native), false,
841 					 false, false);
842 			if (!m)
843 				continue;
844 
845 			drm_mode_probed_add(connector, m);
846 			modes++;
847 		}
848 
849 		mode++;
850 	}
851 
852 	return modes;
853 }
854 
855 static void
856 nouveau_connector_detect_depth(struct drm_connector *connector)
857 {
858 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
859 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
860 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
861 	struct nvbios *bios = &drm->vbios;
862 	struct drm_display_mode *mode = nv_connector->native_mode;
863 	bool duallink;
864 
865 	/* if the edid is feeling nice enough to provide this info, use it */
866 	if (nv_connector->edid && connector->display_info.bpc)
867 		return;
868 
869 	/* EDID 1.4 is *supposed* to be supported on eDP, but, Apple... */
870 	if (nv_connector->type == DCB_CONNECTOR_eDP) {
871 		connector->display_info.bpc = 6;
872 		return;
873 	}
874 
875 	/* we're out of options unless we're LVDS, default to 8bpc */
876 	if (nv_encoder->dcb->type != DCB_OUTPUT_LVDS) {
877 		connector->display_info.bpc = 8;
878 		return;
879 	}
880 
881 	connector->display_info.bpc = 6;
882 
883 	/* LVDS: panel straps */
884 	if (bios->fp_no_ddc) {
885 		if (bios->fp.if_is_24bit)
886 			connector->display_info.bpc = 8;
887 		return;
888 	}
889 
890 	/* LVDS: DDC panel, need to first determine the number of links to
891 	 * know which if_is_24bit flag to check...
892 	 */
893 	if (nv_connector->edid &&
894 	    nv_connector->type == DCB_CONNECTOR_LVDS_SPWG)
895 		duallink = ((u8 *)nv_connector->edid)[121] == 2;
896 	else
897 		duallink = mode->clock >= bios->fp.duallink_transition_clk;
898 
899 	if ((!duallink && (bios->fp.strapless_is_24bit & 1)) ||
900 	    ( duallink && (bios->fp.strapless_is_24bit & 2)))
901 		connector->display_info.bpc = 8;
902 }
903 
904 static int
905 nouveau_connector_late_register(struct drm_connector *connector)
906 {
907 	int ret;
908 
909 	ret = nouveau_backlight_init(connector);
910 	if (ret)
911 		return ret;
912 
913 	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
914 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
915 		ret = drm_dp_aux_register(&nouveau_connector(connector)->aux);
916 		if (ret)
917 			goto backlight_fini;
918 	}
919 
920 	return 0;
921 backlight_fini:
922 	nouveau_backlight_fini(connector);
923 	return ret;
924 }
925 
926 static void
927 nouveau_connector_early_unregister(struct drm_connector *connector)
928 {
929 	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
930 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)
931 		drm_dp_aux_unregister(&nouveau_connector(connector)->aux);
932 
933 	nouveau_backlight_fini(connector);
934 }
935 
936 static int
937 nouveau_connector_get_modes(struct drm_connector *connector)
938 {
939 	struct drm_device *dev = connector->dev;
940 	struct nouveau_drm *drm = nouveau_drm(dev);
941 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
942 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
943 	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
944 	int ret = 0;
945 
946 	/* destroy the native mode, the attached monitor could have changed.
947 	 */
948 	if (nv_connector->native_mode) {
949 		drm_mode_destroy(dev, nv_connector->native_mode);
950 		nv_connector->native_mode = NULL;
951 	}
952 
953 	if (nv_connector->edid)
954 		ret = drm_add_edid_modes(connector, nv_connector->edid);
955 	else
956 	if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS &&
957 	    (nv_encoder->dcb->lvdsconf.use_straps_for_mode ||
958 	     drm->vbios.fp_no_ddc) && nouveau_bios_fp_mode(dev, NULL)) {
959 		struct drm_display_mode mode;
960 
961 		nouveau_bios_fp_mode(dev, &mode);
962 		nv_connector->native_mode = drm_mode_duplicate(dev, &mode);
963 	}
964 
965 	/* Determine display colour depth for everything except LVDS now,
966 	 * DP requires this before mode_valid() is called.
967 	 */
968 	if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS)
969 		nouveau_connector_detect_depth(connector);
970 
971 	/* Find the native mode if this is a digital panel, if we didn't
972 	 * find any modes through DDC previously add the native mode to
973 	 * the list of modes.
974 	 */
975 	if (!nv_connector->native_mode)
976 		nv_connector->native_mode = nouveau_conn_native_mode(connector);
977 	if (ret == 0 && nv_connector->native_mode) {
978 		struct drm_display_mode *mode;
979 
980 		mode = drm_mode_duplicate(dev, nv_connector->native_mode);
981 		drm_mode_probed_add(connector, mode);
982 		ret = 1;
983 	}
984 
985 	/* Determine LVDS colour depth, must happen after determining
986 	 * "native" mode as some VBIOS tables require us to use the
987 	 * pixel clock as part of the lookup...
988 	 */
989 	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
990 		nouveau_connector_detect_depth(connector);
991 
992 	if (nv_encoder->dcb->type == DCB_OUTPUT_TV)
993 		ret = get_slave_funcs(encoder)->get_modes(encoder, connector);
994 
995 	if (nv_connector->type == DCB_CONNECTOR_LVDS ||
996 	    nv_connector->type == DCB_CONNECTOR_LVDS_SPWG ||
997 	    nv_connector->type == DCB_CONNECTOR_eDP)
998 		ret += nouveau_connector_scaler_modes_add(connector);
999 
1000 	return ret;
1001 }
1002 
1003 static unsigned
1004 get_tmds_link_bandwidth(struct drm_connector *connector)
1005 {
1006 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
1007 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
1008 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
1009 	struct dcb_output *dcb = nv_connector->detected_encoder->dcb;
1010 	struct drm_display_info *info = NULL;
1011 	unsigned duallink_scale =
1012 		nouveau_duallink && nv_encoder->dcb->duallink_possible ? 2 : 1;
1013 
1014 	if (drm_detect_hdmi_monitor(nv_connector->edid)) {
1015 		info = &nv_connector->base.display_info;
1016 		duallink_scale = 1;
1017 	}
1018 
1019 	if (info) {
1020 		if (nouveau_hdmimhz > 0)
1021 			return nouveau_hdmimhz * 1000;
1022 		/* Note: these limits are conservative, some Fermi's
1023 		 * can do 297 MHz. Unclear how this can be determined.
1024 		 */
1025 		if (drm->client.device.info.chipset >= 0x120) {
1026 			const int max_tmds_clock =
1027 				info->hdmi.scdc.scrambling.supported ?
1028 				594000 : 340000;
1029 			return info->max_tmds_clock ?
1030 				min(info->max_tmds_clock, max_tmds_clock) :
1031 				max_tmds_clock;
1032 		}
1033 		if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_KEPLER)
1034 			return 297000;
1035 		if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_FERMI)
1036 			return 225000;
1037 	}
1038 
1039 	if (dcb->location != DCB_LOC_ON_CHIP ||
1040 	    drm->client.device.info.chipset >= 0x46)
1041 		return 165000 * duallink_scale;
1042 	else if (drm->client.device.info.chipset >= 0x40)
1043 		return 155000 * duallink_scale;
1044 	else if (drm->client.device.info.chipset >= 0x18)
1045 		return 135000 * duallink_scale;
1046 	else
1047 		return 112000 * duallink_scale;
1048 }
1049 
1050 static enum drm_mode_status
1051 nouveau_connector_mode_valid(struct drm_connector *connector,
1052 			     struct drm_display_mode *mode)
1053 {
1054 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
1055 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
1056 	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
1057 	unsigned int min_clock = 25000, max_clock = min_clock, clock = mode->clock;
1058 
1059 	switch (nv_encoder->dcb->type) {
1060 	case DCB_OUTPUT_LVDS:
1061 		if (nv_connector->native_mode &&
1062 		    (mode->hdisplay > nv_connector->native_mode->hdisplay ||
1063 		     mode->vdisplay > nv_connector->native_mode->vdisplay))
1064 			return MODE_PANEL;
1065 
1066 		min_clock = 0;
1067 		max_clock = 400000;
1068 		break;
1069 	case DCB_OUTPUT_TMDS:
1070 		max_clock = get_tmds_link_bandwidth(connector);
1071 		break;
1072 	case DCB_OUTPUT_ANALOG:
1073 		max_clock = nv_encoder->dcb->crtconf.maxfreq;
1074 		if (!max_clock)
1075 			max_clock = 350000;
1076 		break;
1077 	case DCB_OUTPUT_TV:
1078 		return get_slave_funcs(encoder)->mode_valid(encoder, mode);
1079 	case DCB_OUTPUT_DP:
1080 		return nv50_dp_mode_valid(connector, nv_encoder, mode, NULL);
1081 	default:
1082 		BUG();
1083 		return MODE_BAD;
1084 	}
1085 
1086 	if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
1087 		clock *= 2;
1088 
1089 	if (clock < min_clock)
1090 		return MODE_CLOCK_LOW;
1091 	if (clock > max_clock)
1092 		return MODE_CLOCK_HIGH;
1093 
1094 	return MODE_OK;
1095 }
1096 
1097 static struct drm_encoder *
1098 nouveau_connector_best_encoder(struct drm_connector *connector)
1099 {
1100 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
1101 
1102 	if (nv_connector->detected_encoder)
1103 		return to_drm_encoder(nv_connector->detected_encoder);
1104 
1105 	return NULL;
1106 }
1107 
1108 static const struct drm_connector_helper_funcs
1109 nouveau_connector_helper_funcs = {
1110 	.get_modes = nouveau_connector_get_modes,
1111 	.mode_valid = nouveau_connector_mode_valid,
1112 	.best_encoder = nouveau_connector_best_encoder,
1113 };
1114 
1115 static const struct drm_connector_funcs
1116 nouveau_connector_funcs = {
1117 	.dpms = drm_helper_connector_dpms,
1118 	.reset = nouveau_conn_reset,
1119 	.detect = nouveau_connector_detect,
1120 	.force = nouveau_connector_force,
1121 	.fill_modes = drm_helper_probe_single_connector_modes,
1122 	.set_property = nouveau_connector_set_property,
1123 	.destroy = nouveau_connector_destroy,
1124 	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
1125 	.atomic_destroy_state = nouveau_conn_atomic_destroy_state,
1126 	.atomic_set_property = nouveau_conn_atomic_set_property,
1127 	.atomic_get_property = nouveau_conn_atomic_get_property,
1128 	.late_register = nouveau_connector_late_register,
1129 	.early_unregister = nouveau_connector_early_unregister,
1130 };
1131 
1132 static const struct drm_connector_funcs
1133 nouveau_connector_funcs_lvds = {
1134 	.dpms = drm_helper_connector_dpms,
1135 	.reset = nouveau_conn_reset,
1136 	.detect = nouveau_connector_detect_lvds,
1137 	.force = nouveau_connector_force,
1138 	.fill_modes = drm_helper_probe_single_connector_modes,
1139 	.set_property = nouveau_connector_set_property,
1140 	.destroy = nouveau_connector_destroy,
1141 	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
1142 	.atomic_destroy_state = nouveau_conn_atomic_destroy_state,
1143 	.atomic_set_property = nouveau_conn_atomic_set_property,
1144 	.atomic_get_property = nouveau_conn_atomic_get_property,
1145 	.late_register = nouveau_connector_late_register,
1146 	.early_unregister = nouveau_connector_early_unregister,
1147 };
1148 
1149 void
1150 nouveau_connector_hpd(struct drm_connector *connector)
1151 {
1152 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
1153 	u32 mask = drm_connector_mask(connector);
1154 
1155 	mutex_lock(&drm->hpd_lock);
1156 	if (!(drm->hpd_pending & mask)) {
1157 		drm->hpd_pending |= mask;
1158 		schedule_work(&drm->hpd_work);
1159 	}
1160 	mutex_unlock(&drm->hpd_lock);
1161 }
1162 
1163 static int
1164 nouveau_connector_hotplug(struct nvif_notify *notify)
1165 {
1166 	struct nouveau_connector *nv_connector =
1167 		container_of(notify, typeof(*nv_connector), hpd);
1168 	struct drm_connector *connector = &nv_connector->base;
1169 	struct drm_device *dev = connector->dev;
1170 	struct nouveau_drm *drm = nouveau_drm(dev);
1171 	const struct nvif_notify_conn_rep_v0 *rep = notify->data;
1172 	bool plugged = (rep->mask != NVIF_NOTIFY_CONN_V0_UNPLUG);
1173 
1174 	if (rep->mask & NVIF_NOTIFY_CONN_V0_IRQ) {
1175 		nouveau_dp_irq(drm, nv_connector);
1176 		return NVIF_NOTIFY_KEEP;
1177 	}
1178 
1179 	NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un", connector->name);
1180 	nouveau_connector_hpd(connector);
1181 
1182 	return NVIF_NOTIFY_KEEP;
1183 }
1184 
1185 static ssize_t
1186 nouveau_connector_aux_xfer(struct drm_dp_aux *obj, struct drm_dp_aux_msg *msg)
1187 {
1188 	struct nouveau_connector *nv_connector =
1189 		container_of(obj, typeof(*nv_connector), aux);
1190 	struct nouveau_encoder *nv_encoder;
1191 	struct nvkm_i2c_aux *aux;
1192 	u8 size = msg->size;
1193 	int ret;
1194 
1195 	nv_encoder = find_encoder(&nv_connector->base, DCB_OUTPUT_DP);
1196 	if (!nv_encoder || !(aux = nv_encoder->aux))
1197 		return -ENODEV;
1198 	if (WARN_ON(msg->size > 16))
1199 		return -E2BIG;
1200 
1201 	ret = nvkm_i2c_aux_acquire(aux);
1202 	if (ret)
1203 		return ret;
1204 
1205 	ret = nvkm_i2c_aux_xfer(aux, false, msg->request, msg->address,
1206 				msg->buffer, &size);
1207 	nvkm_i2c_aux_release(aux);
1208 	if (ret >= 0) {
1209 		msg->reply = ret;
1210 		return size;
1211 	}
1212 
1213 	return ret;
1214 }
1215 
1216 static int
1217 drm_conntype_from_dcb(enum dcb_connector_type dcb)
1218 {
1219 	switch (dcb) {
1220 	case DCB_CONNECTOR_VGA      : return DRM_MODE_CONNECTOR_VGA;
1221 	case DCB_CONNECTOR_TV_0     :
1222 	case DCB_CONNECTOR_TV_1     :
1223 	case DCB_CONNECTOR_TV_3     : return DRM_MODE_CONNECTOR_TV;
1224 	case DCB_CONNECTOR_DMS59_0  :
1225 	case DCB_CONNECTOR_DMS59_1  :
1226 	case DCB_CONNECTOR_DVI_I    : return DRM_MODE_CONNECTOR_DVII;
1227 	case DCB_CONNECTOR_DVI_D    : return DRM_MODE_CONNECTOR_DVID;
1228 	case DCB_CONNECTOR_LVDS     :
1229 	case DCB_CONNECTOR_LVDS_SPWG: return DRM_MODE_CONNECTOR_LVDS;
1230 	case DCB_CONNECTOR_DMS59_DP0:
1231 	case DCB_CONNECTOR_DMS59_DP1:
1232 	case DCB_CONNECTOR_DP       :
1233 	case DCB_CONNECTOR_mDP      :
1234 	case DCB_CONNECTOR_USB_C    : return DRM_MODE_CONNECTOR_DisplayPort;
1235 	case DCB_CONNECTOR_eDP      : return DRM_MODE_CONNECTOR_eDP;
1236 	case DCB_CONNECTOR_HDMI_0   :
1237 	case DCB_CONNECTOR_HDMI_1   :
1238 	case DCB_CONNECTOR_HDMI_C   : return DRM_MODE_CONNECTOR_HDMIA;
1239 	case DCB_CONNECTOR_WFD	    : return DRM_MODE_CONNECTOR_VIRTUAL;
1240 	default:
1241 		break;
1242 	}
1243 
1244 	return DRM_MODE_CONNECTOR_Unknown;
1245 }
1246 
1247 struct drm_connector *
1248 nouveau_connector_create(struct drm_device *dev,
1249 			 const struct dcb_output *dcbe)
1250 {
1251 	const struct drm_connector_funcs *funcs = &nouveau_connector_funcs;
1252 	struct nouveau_drm *drm = nouveau_drm(dev);
1253 	struct nouveau_display *disp = nouveau_display(dev);
1254 	struct nouveau_connector *nv_connector = NULL;
1255 	struct drm_connector *connector;
1256 	struct drm_connector_list_iter conn_iter;
1257 	char aux_name[48] = {0};
1258 	int index = dcbe->connector;
1259 	int type, ret = 0;
1260 	bool dummy;
1261 
1262 	drm_connector_list_iter_begin(dev, &conn_iter);
1263 	nouveau_for_each_non_mst_connector_iter(connector, &conn_iter) {
1264 		nv_connector = nouveau_connector(connector);
1265 		if (nv_connector->index == index) {
1266 			drm_connector_list_iter_end(&conn_iter);
1267 			return connector;
1268 		}
1269 	}
1270 	drm_connector_list_iter_end(&conn_iter);
1271 
1272 	nv_connector = kzalloc(sizeof(*nv_connector), GFP_KERNEL);
1273 	if (!nv_connector)
1274 		return ERR_PTR(-ENOMEM);
1275 
1276 	connector = &nv_connector->base;
1277 	nv_connector->index = index;
1278 
1279 	/* attempt to parse vbios connector type and hotplug gpio */
1280 	nv_connector->dcb = olddcb_conn(dev, index);
1281 	if (nv_connector->dcb) {
1282 		u32 entry = ROM16(nv_connector->dcb[0]);
1283 		if (olddcb_conntab(dev)[3] >= 4)
1284 			entry |= (u32)ROM16(nv_connector->dcb[2]) << 16;
1285 
1286 		nv_connector->type = nv_connector->dcb[0];
1287 		if (drm_conntype_from_dcb(nv_connector->type) ==
1288 					  DRM_MODE_CONNECTOR_Unknown) {
1289 			NV_WARN(drm, "unknown connector type %02x\n",
1290 				nv_connector->type);
1291 			nv_connector->type = DCB_CONNECTOR_NONE;
1292 		}
1293 
1294 		/* Gigabyte NX85T */
1295 		if (nv_match_device(dev, 0x0421, 0x1458, 0x344c)) {
1296 			if (nv_connector->type == DCB_CONNECTOR_HDMI_1)
1297 				nv_connector->type = DCB_CONNECTOR_DVI_I;
1298 		}
1299 
1300 		/* Gigabyte GV-NX86T512H */
1301 		if (nv_match_device(dev, 0x0402, 0x1458, 0x3455)) {
1302 			if (nv_connector->type == DCB_CONNECTOR_HDMI_1)
1303 				nv_connector->type = DCB_CONNECTOR_DVI_I;
1304 		}
1305 	} else {
1306 		nv_connector->type = DCB_CONNECTOR_NONE;
1307 	}
1308 
1309 	/* no vbios data, or an unknown dcb connector type - attempt to
1310 	 * figure out something suitable ourselves
1311 	 */
1312 	if (nv_connector->type == DCB_CONNECTOR_NONE) {
1313 		struct nouveau_drm *drm = nouveau_drm(dev);
1314 		struct dcb_table *dcbt = &drm->vbios.dcb;
1315 		u32 encoders = 0;
1316 		int i;
1317 
1318 		for (i = 0; i < dcbt->entries; i++) {
1319 			if (dcbt->entry[i].connector == nv_connector->index)
1320 				encoders |= (1 << dcbt->entry[i].type);
1321 		}
1322 
1323 		if (encoders & (1 << DCB_OUTPUT_DP)) {
1324 			if (encoders & (1 << DCB_OUTPUT_TMDS))
1325 				nv_connector->type = DCB_CONNECTOR_DP;
1326 			else
1327 				nv_connector->type = DCB_CONNECTOR_eDP;
1328 		} else
1329 		if (encoders & (1 << DCB_OUTPUT_TMDS)) {
1330 			if (encoders & (1 << DCB_OUTPUT_ANALOG))
1331 				nv_connector->type = DCB_CONNECTOR_DVI_I;
1332 			else
1333 				nv_connector->type = DCB_CONNECTOR_DVI_D;
1334 		} else
1335 		if (encoders & (1 << DCB_OUTPUT_ANALOG)) {
1336 			nv_connector->type = DCB_CONNECTOR_VGA;
1337 		} else
1338 		if (encoders & (1 << DCB_OUTPUT_LVDS)) {
1339 			nv_connector->type = DCB_CONNECTOR_LVDS;
1340 		} else
1341 		if (encoders & (1 << DCB_OUTPUT_TV)) {
1342 			nv_connector->type = DCB_CONNECTOR_TV_0;
1343 		}
1344 	}
1345 
1346 	switch ((type = drm_conntype_from_dcb(nv_connector->type))) {
1347 	case DRM_MODE_CONNECTOR_LVDS:
1348 		ret = nouveau_bios_parse_lvds_table(dev, 0, &dummy, &dummy);
1349 		if (ret) {
1350 			NV_ERROR(drm, "Error parsing LVDS table, disabling\n");
1351 			kfree(nv_connector);
1352 			return ERR_PTR(ret);
1353 		}
1354 
1355 		funcs = &nouveau_connector_funcs_lvds;
1356 		break;
1357 	case DRM_MODE_CONNECTOR_DisplayPort:
1358 	case DRM_MODE_CONNECTOR_eDP:
1359 		nv_connector->aux.dev = connector->kdev;
1360 		nv_connector->aux.drm_dev = dev;
1361 		nv_connector->aux.transfer = nouveau_connector_aux_xfer;
1362 		snprintf(aux_name, sizeof(aux_name), "sor-%04x-%04x",
1363 			 dcbe->hasht, dcbe->hashm);
1364 		nv_connector->aux.name = kstrdup(aux_name, GFP_KERNEL);
1365 		if (!nv_connector->aux.name) {
1366 			kfree(nv_connector);
1367 			return ERR_PTR(-ENOMEM);
1368 		}
1369 		drm_dp_aux_init(&nv_connector->aux);
1370 		fallthrough;
1371 	default:
1372 		funcs = &nouveau_connector_funcs;
1373 		break;
1374 	}
1375 
1376 	/* HDMI 3D support */
1377 	if ((disp->disp.object.oclass >= G82_DISP)
1378 	    && ((type == DRM_MODE_CONNECTOR_DisplayPort)
1379 		|| (type == DRM_MODE_CONNECTOR_eDP)
1380 		|| (type == DRM_MODE_CONNECTOR_HDMIA)))
1381 		connector->stereo_allowed = true;
1382 
1383 	/* defaults, will get overridden in detect() */
1384 	connector->interlace_allowed = false;
1385 	connector->doublescan_allowed = false;
1386 
1387 	drm_connector_init(dev, connector, funcs, type);
1388 	drm_connector_helper_add(connector, &nouveau_connector_helper_funcs);
1389 
1390 	if (nv_connector->dcb && (disp->disp.conn_mask & BIT(nv_connector->index))) {
1391 		ret = nvif_conn_ctor(&disp->disp, nv_connector->base.name, nv_connector->index,
1392 				     &nv_connector->conn);
1393 		if (ret) {
1394 			kfree(nv_connector);
1395 			return ERR_PTR(ret);
1396 		}
1397 	}
1398 
1399 	connector->funcs->reset(connector);
1400 	nouveau_conn_attach_properties(connector);
1401 
1402 	/* Default scaling mode */
1403 	switch (nv_connector->type) {
1404 	case DCB_CONNECTOR_LVDS:
1405 	case DCB_CONNECTOR_LVDS_SPWG:
1406 	case DCB_CONNECTOR_eDP:
1407 		/* see note in nouveau_connector_set_property() */
1408 		if (disp->disp.object.oclass < NV50_DISP) {
1409 			nv_connector->scaling_mode = DRM_MODE_SCALE_FULLSCREEN;
1410 			break;
1411 		}
1412 		nv_connector->scaling_mode = DRM_MODE_SCALE_NONE;
1413 		break;
1414 	default:
1415 		nv_connector->scaling_mode = DRM_MODE_SCALE_NONE;
1416 		break;
1417 	}
1418 
1419 	/* dithering properties */
1420 	switch (nv_connector->type) {
1421 	case DCB_CONNECTOR_TV_0:
1422 	case DCB_CONNECTOR_TV_1:
1423 	case DCB_CONNECTOR_TV_3:
1424 	case DCB_CONNECTOR_VGA:
1425 		break;
1426 	default:
1427 		nv_connector->dithering_mode = DITHERING_MODE_AUTO;
1428 		break;
1429 	}
1430 
1431 	switch (type) {
1432 	case DRM_MODE_CONNECTOR_DisplayPort:
1433 	case DRM_MODE_CONNECTOR_eDP:
1434 		drm_dp_cec_register_connector(&nv_connector->aux, connector);
1435 		break;
1436 	}
1437 
1438 	ret = nvif_notify_ctor(&disp->disp.object, "kmsHotplug",
1439 			       nouveau_connector_hotplug,
1440 			       true, NV04_DISP_NTFY_CONN,
1441 			       &(struct nvif_notify_conn_req_v0) {
1442 				.mask = NVIF_NOTIFY_CONN_V0_ANY,
1443 				.conn = index,
1444 			       },
1445 			       sizeof(struct nvif_notify_conn_req_v0),
1446 			       sizeof(struct nvif_notify_conn_rep_v0),
1447 			       &nv_connector->hpd);
1448 	if (ret)
1449 		connector->polled = DRM_CONNECTOR_POLL_CONNECT;
1450 	else
1451 		connector->polled = DRM_CONNECTOR_POLL_HPD;
1452 
1453 	drm_connector_register(connector);
1454 	return connector;
1455 }
1456