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 		drm_dp_cec_set_edid(&nv_connector->aux, nv_connector->edid);
623 		goto out;
624 	} else {
625 		nouveau_connector_set_edid(nv_connector, NULL);
626 	}
627 
628 	nv_encoder = nouveau_connector_of_detect(connector);
629 	if (nv_encoder) {
630 		nouveau_connector_set_encoder(connector, nv_encoder);
631 		conn_status = connector_status_connected;
632 		goto out;
633 	}
634 
635 detect_analog:
636 	nv_encoder = find_encoder(connector, DCB_OUTPUT_ANALOG);
637 	if (!nv_encoder && !nouveau_tv_disable)
638 		nv_encoder = find_encoder(connector, DCB_OUTPUT_TV);
639 	if (nv_encoder && force) {
640 		struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
641 		const struct drm_encoder_helper_funcs *helper =
642 						encoder->helper_private;
643 
644 		if (helper->detect(encoder, connector) ==
645 						connector_status_connected) {
646 			nouveau_connector_set_encoder(connector, nv_encoder);
647 			conn_status = connector_status_connected;
648 			goto out;
649 		}
650 	}
651 
652  out:
653 	if (!nv_connector->edid)
654 		drm_dp_cec_unset_edid(&nv_connector->aux);
655 
656 	pm_runtime_mark_last_busy(dev->dev);
657 	pm_runtime_put_autosuspend(dev->dev);
658 
659 	return conn_status;
660 }
661 
662 static enum drm_connector_status
663 nouveau_connector_detect_lvds(struct drm_connector *connector, bool force)
664 {
665 	struct drm_device *dev = connector->dev;
666 	struct nouveau_drm *drm = nouveau_drm(dev);
667 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
668 	struct nouveau_encoder *nv_encoder = NULL;
669 	struct edid *edid = NULL;
670 	enum drm_connector_status status = connector_status_disconnected;
671 
672 	nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
673 	if (!nv_encoder)
674 		goto out;
675 
676 	/* Try retrieving EDID via DDC */
677 	if (!drm->vbios.fp_no_ddc) {
678 		status = nouveau_connector_detect(connector, force);
679 		if (status == connector_status_connected) {
680 			edid = nv_connector->edid;
681 			goto out;
682 		}
683 	}
684 
685 	/* On some laptops (Sony, i'm looking at you) there appears to
686 	 * be no direct way of accessing the panel's EDID.  The only
687 	 * option available to us appears to be to ask ACPI for help..
688 	 *
689 	 * It's important this check's before trying straps, one of the
690 	 * said manufacturer's laptops are configured in such a way
691 	 * the nouveau decides an entry in the VBIOS FP mode table is
692 	 * valid - it's not (rh#613284)
693 	 */
694 	if (nv_encoder->dcb->lvdsconf.use_acpi_for_edid) {
695 		edid = nouveau_acpi_edid(dev, connector);
696 		if (edid) {
697 			status = connector_status_connected;
698 			goto out;
699 		}
700 	}
701 
702 	/* If no EDID found above, and the VBIOS indicates a hardcoded
703 	 * modeline is avalilable for the panel, set it as the panel's
704 	 * native mode and exit.
705 	 */
706 	if (nouveau_bios_fp_mode(dev, NULL) && (drm->vbios.fp_no_ddc ||
707 	    nv_encoder->dcb->lvdsconf.use_straps_for_mode)) {
708 		status = connector_status_connected;
709 		goto out;
710 	}
711 
712 	/* Still nothing, some VBIOS images have a hardcoded EDID block
713 	 * stored for the panel stored in them.
714 	 */
715 	if (!drm->vbios.fp_no_ddc) {
716 		edid = (struct edid *)nouveau_bios_embedded_edid(dev);
717 		if (edid) {
718 			edid = kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
719 			if (edid)
720 				status = connector_status_connected;
721 		}
722 	}
723 
724 out:
725 #if defined(CONFIG_ACPI_BUTTON) || \
726 	(defined(CONFIG_ACPI_BUTTON_MODULE) && defined(MODULE))
727 	if (status == connector_status_connected &&
728 	    !nouveau_ignorelid && !acpi_lid_open())
729 		status = connector_status_unknown;
730 #endif
731 
732 	nouveau_connector_set_edid(nv_connector, edid);
733 	if (nv_encoder)
734 		nouveau_connector_set_encoder(connector, nv_encoder);
735 	return status;
736 }
737 
738 static void
739 nouveau_connector_force(struct drm_connector *connector)
740 {
741 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
742 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
743 	struct nouveau_encoder *nv_encoder;
744 	int type;
745 
746 	if (nv_connector->type == DCB_CONNECTOR_DVI_I) {
747 		if (connector->force == DRM_FORCE_ON_DIGITAL)
748 			type = DCB_OUTPUT_TMDS;
749 		else
750 			type = DCB_OUTPUT_ANALOG;
751 	} else
752 		type = DCB_OUTPUT_ANY;
753 
754 	nv_encoder = find_encoder(connector, type);
755 	if (!nv_encoder) {
756 		NV_ERROR(drm, "can't find encoder to force %s on!\n",
757 			 connector->name);
758 		connector->status = connector_status_disconnected;
759 		return;
760 	}
761 
762 	nouveau_connector_set_encoder(connector, nv_encoder);
763 }
764 
765 static int
766 nouveau_connector_set_property(struct drm_connector *connector,
767 			       struct drm_property *property, uint64_t value)
768 {
769 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
770 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
771 	struct nouveau_conn_atom *asyc = &nv_connector->properties_state;
772 	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
773 	int ret;
774 
775 	ret = connector->funcs->atomic_set_property(&nv_connector->base,
776 						    &asyc->state,
777 						    property, value);
778 	if (ret) {
779 		if (nv_encoder && nv_encoder->dcb->type == DCB_OUTPUT_TV)
780 			return get_slave_funcs(encoder)->set_property(
781 				encoder, connector, property, value);
782 		return ret;
783 	}
784 
785 	nv_connector->scaling_mode = asyc->scaler.mode;
786 	nv_connector->dithering_mode = asyc->dither.mode;
787 
788 	if (connector->encoder && connector->encoder->crtc) {
789 		ret = drm_crtc_helper_set_mode(connector->encoder->crtc,
790 					      &connector->encoder->crtc->mode,
791 					       connector->encoder->crtc->x,
792 					       connector->encoder->crtc->y,
793 					       NULL);
794 		if (!ret)
795 			return -EINVAL;
796 	}
797 
798 	return 0;
799 }
800 
801 struct moderec {
802 	int hdisplay;
803 	int vdisplay;
804 };
805 
806 static struct moderec scaler_modes[] = {
807 	{ 1920, 1200 },
808 	{ 1920, 1080 },
809 	{ 1680, 1050 },
810 	{ 1600, 1200 },
811 	{ 1400, 1050 },
812 	{ 1280, 1024 },
813 	{ 1280, 960 },
814 	{ 1152, 864 },
815 	{ 1024, 768 },
816 	{ 800, 600 },
817 	{ 720, 400 },
818 	{ 640, 480 },
819 	{ 640, 400 },
820 	{ 640, 350 },
821 	{}
822 };
823 
824 static int
825 nouveau_connector_scaler_modes_add(struct drm_connector *connector)
826 {
827 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
828 	struct drm_display_mode *native = nv_connector->native_mode, *m;
829 	struct drm_device *dev = connector->dev;
830 	struct moderec *mode = &scaler_modes[0];
831 	int modes = 0;
832 
833 	if (!native)
834 		return 0;
835 
836 	while (mode->hdisplay) {
837 		if (mode->hdisplay <= native->hdisplay &&
838 		    mode->vdisplay <= native->vdisplay &&
839 		    (mode->hdisplay != native->hdisplay ||
840 		     mode->vdisplay != native->vdisplay)) {
841 			m = drm_cvt_mode(dev, mode->hdisplay, mode->vdisplay,
842 					 drm_mode_vrefresh(native), false,
843 					 false, false);
844 			if (!m)
845 				continue;
846 
847 			drm_mode_probed_add(connector, m);
848 			modes++;
849 		}
850 
851 		mode++;
852 	}
853 
854 	return modes;
855 }
856 
857 static void
858 nouveau_connector_detect_depth(struct drm_connector *connector)
859 {
860 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
861 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
862 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
863 	struct nvbios *bios = &drm->vbios;
864 	struct drm_display_mode *mode = nv_connector->native_mode;
865 	bool duallink;
866 
867 	/* if the edid is feeling nice enough to provide this info, use it */
868 	if (nv_connector->edid && connector->display_info.bpc)
869 		return;
870 
871 	/* EDID 1.4 is *supposed* to be supported on eDP, but, Apple... */
872 	if (nv_connector->type == DCB_CONNECTOR_eDP) {
873 		connector->display_info.bpc = 6;
874 		return;
875 	}
876 
877 	/* we're out of options unless we're LVDS, default to 8bpc */
878 	if (nv_encoder->dcb->type != DCB_OUTPUT_LVDS) {
879 		connector->display_info.bpc = 8;
880 		return;
881 	}
882 
883 	connector->display_info.bpc = 6;
884 
885 	/* LVDS: panel straps */
886 	if (bios->fp_no_ddc) {
887 		if (bios->fp.if_is_24bit)
888 			connector->display_info.bpc = 8;
889 		return;
890 	}
891 
892 	/* LVDS: DDC panel, need to first determine the number of links to
893 	 * know which if_is_24bit flag to check...
894 	 */
895 	if (nv_connector->edid &&
896 	    nv_connector->type == DCB_CONNECTOR_LVDS_SPWG)
897 		duallink = ((u8 *)nv_connector->edid)[121] == 2;
898 	else
899 		duallink = mode->clock >= bios->fp.duallink_transition_clk;
900 
901 	if ((!duallink && (bios->fp.strapless_is_24bit & 1)) ||
902 	    ( duallink && (bios->fp.strapless_is_24bit & 2)))
903 		connector->display_info.bpc = 8;
904 }
905 
906 static int
907 nouveau_connector_late_register(struct drm_connector *connector)
908 {
909 	int ret;
910 
911 	ret = nouveau_backlight_init(connector);
912 	if (ret)
913 		return ret;
914 
915 	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
916 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
917 		ret = drm_dp_aux_register(&nouveau_connector(connector)->aux);
918 		if (ret)
919 			goto backlight_fini;
920 	}
921 
922 	return 0;
923 backlight_fini:
924 	nouveau_backlight_fini(connector);
925 	return ret;
926 }
927 
928 static void
929 nouveau_connector_early_unregister(struct drm_connector *connector)
930 {
931 	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
932 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)
933 		drm_dp_aux_unregister(&nouveau_connector(connector)->aux);
934 
935 	nouveau_backlight_fini(connector);
936 }
937 
938 static int
939 nouveau_connector_get_modes(struct drm_connector *connector)
940 {
941 	struct drm_device *dev = connector->dev;
942 	struct nouveau_drm *drm = nouveau_drm(dev);
943 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
944 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
945 	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
946 	int ret = 0;
947 
948 	/* destroy the native mode, the attached monitor could have changed.
949 	 */
950 	if (nv_connector->native_mode) {
951 		drm_mode_destroy(dev, nv_connector->native_mode);
952 		nv_connector->native_mode = NULL;
953 	}
954 
955 	if (nv_connector->edid)
956 		ret = drm_add_edid_modes(connector, nv_connector->edid);
957 	else
958 	if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS &&
959 	    (nv_encoder->dcb->lvdsconf.use_straps_for_mode ||
960 	     drm->vbios.fp_no_ddc) && nouveau_bios_fp_mode(dev, NULL)) {
961 		struct drm_display_mode mode;
962 
963 		nouveau_bios_fp_mode(dev, &mode);
964 		nv_connector->native_mode = drm_mode_duplicate(dev, &mode);
965 	}
966 
967 	/* Determine display colour depth for everything except LVDS now,
968 	 * DP requires this before mode_valid() is called.
969 	 */
970 	if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS && nv_connector->native_mode)
971 		nouveau_connector_detect_depth(connector);
972 
973 	/* Find the native mode if this is a digital panel, if we didn't
974 	 * find any modes through DDC previously add the native mode to
975 	 * the list of modes.
976 	 */
977 	if (!nv_connector->native_mode)
978 		nv_connector->native_mode = nouveau_conn_native_mode(connector);
979 	if (ret == 0 && nv_connector->native_mode) {
980 		struct drm_display_mode *mode;
981 
982 		mode = drm_mode_duplicate(dev, nv_connector->native_mode);
983 		drm_mode_probed_add(connector, mode);
984 		ret = 1;
985 	}
986 
987 	/* Determine LVDS colour depth, must happen after determining
988 	 * "native" mode as some VBIOS tables require us to use the
989 	 * pixel clock as part of the lookup...
990 	 */
991 	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS && nv_connector->native_mode)
992 		nouveau_connector_detect_depth(connector);
993 
994 	if (nv_encoder->dcb->type == DCB_OUTPUT_TV)
995 		ret = get_slave_funcs(encoder)->get_modes(encoder, connector);
996 
997 	if (nv_connector->type == DCB_CONNECTOR_LVDS ||
998 	    nv_connector->type == DCB_CONNECTOR_LVDS_SPWG ||
999 	    nv_connector->type == DCB_CONNECTOR_eDP)
1000 		ret += nouveau_connector_scaler_modes_add(connector);
1001 
1002 	return ret;
1003 }
1004 
1005 static unsigned
1006 get_tmds_link_bandwidth(struct drm_connector *connector)
1007 {
1008 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
1009 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
1010 	struct nouveau_drm *drm = nouveau_drm(connector->dev);
1011 	struct dcb_output *dcb = nv_connector->detected_encoder->dcb;
1012 	struct drm_display_info *info = NULL;
1013 	unsigned duallink_scale =
1014 		nouveau_duallink && nv_encoder->dcb->duallink_possible ? 2 : 1;
1015 
1016 	if (drm_detect_hdmi_monitor(nv_connector->edid)) {
1017 		info = &nv_connector->base.display_info;
1018 		duallink_scale = 1;
1019 	}
1020 
1021 	if (info) {
1022 		if (nouveau_hdmimhz > 0)
1023 			return nouveau_hdmimhz * 1000;
1024 		/* Note: these limits are conservative, some Fermi's
1025 		 * can do 297 MHz. Unclear how this can be determined.
1026 		 */
1027 		if (drm->client.device.info.chipset >= 0x120) {
1028 			const int max_tmds_clock =
1029 				info->hdmi.scdc.scrambling.supported ?
1030 				594000 : 340000;
1031 			return info->max_tmds_clock ?
1032 				min(info->max_tmds_clock, max_tmds_clock) :
1033 				max_tmds_clock;
1034 		}
1035 		if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_KEPLER)
1036 			return 297000;
1037 		if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_FERMI)
1038 			return 225000;
1039 	}
1040 
1041 	if (dcb->location != DCB_LOC_ON_CHIP ||
1042 	    drm->client.device.info.chipset >= 0x46)
1043 		return 165000 * duallink_scale;
1044 	else if (drm->client.device.info.chipset >= 0x40)
1045 		return 155000 * duallink_scale;
1046 	else if (drm->client.device.info.chipset >= 0x18)
1047 		return 135000 * duallink_scale;
1048 	else
1049 		return 112000 * duallink_scale;
1050 }
1051 
1052 static enum drm_mode_status
1053 nouveau_connector_mode_valid(struct drm_connector *connector,
1054 			     struct drm_display_mode *mode)
1055 {
1056 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
1057 	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
1058 	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
1059 	unsigned int min_clock = 25000, max_clock = min_clock, clock = mode->clock;
1060 
1061 	switch (nv_encoder->dcb->type) {
1062 	case DCB_OUTPUT_LVDS:
1063 		if (nv_connector->native_mode &&
1064 		    (mode->hdisplay > nv_connector->native_mode->hdisplay ||
1065 		     mode->vdisplay > nv_connector->native_mode->vdisplay))
1066 			return MODE_PANEL;
1067 
1068 		min_clock = 0;
1069 		max_clock = 400000;
1070 		break;
1071 	case DCB_OUTPUT_TMDS:
1072 		max_clock = get_tmds_link_bandwidth(connector);
1073 		break;
1074 	case DCB_OUTPUT_ANALOG:
1075 		max_clock = nv_encoder->dcb->crtconf.maxfreq;
1076 		if (!max_clock)
1077 			max_clock = 350000;
1078 		break;
1079 	case DCB_OUTPUT_TV:
1080 		return get_slave_funcs(encoder)->mode_valid(encoder, mode);
1081 	case DCB_OUTPUT_DP:
1082 		return nv50_dp_mode_valid(connector, nv_encoder, mode, NULL);
1083 	default:
1084 		BUG();
1085 		return MODE_BAD;
1086 	}
1087 
1088 	if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
1089 		clock *= 2;
1090 
1091 	if (clock < min_clock)
1092 		return MODE_CLOCK_LOW;
1093 	if (clock > max_clock)
1094 		return MODE_CLOCK_HIGH;
1095 
1096 	return MODE_OK;
1097 }
1098 
1099 static struct drm_encoder *
1100 nouveau_connector_best_encoder(struct drm_connector *connector)
1101 {
1102 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
1103 
1104 	if (nv_connector->detected_encoder)
1105 		return to_drm_encoder(nv_connector->detected_encoder);
1106 
1107 	return NULL;
1108 }
1109 
1110 static int
1111 nouveau_connector_atomic_check(struct drm_connector *connector, struct drm_atomic_state *state)
1112 {
1113 	struct nouveau_connector *nv_conn = nouveau_connector(connector);
1114 	struct drm_connector_state *conn_state =
1115 		drm_atomic_get_new_connector_state(state, connector);
1116 
1117 	if (!nv_conn->dp_encoder || !nv50_has_mst(nouveau_drm(connector->dev)))
1118 		return 0;
1119 
1120 	return drm_dp_mst_root_conn_atomic_check(conn_state, &nv_conn->dp_encoder->dp.mstm->mgr);
1121 }
1122 
1123 static const struct drm_connector_helper_funcs
1124 nouveau_connector_helper_funcs = {
1125 	.get_modes = nouveau_connector_get_modes,
1126 	.mode_valid = nouveau_connector_mode_valid,
1127 	.best_encoder = nouveau_connector_best_encoder,
1128 	.atomic_check = nouveau_connector_atomic_check,
1129 };
1130 
1131 static const struct drm_connector_funcs
1132 nouveau_connector_funcs = {
1133 	.dpms = drm_helper_connector_dpms,
1134 	.reset = nouveau_conn_reset,
1135 	.detect = nouveau_connector_detect,
1136 	.force = nouveau_connector_force,
1137 	.fill_modes = drm_helper_probe_single_connector_modes,
1138 	.set_property = nouveau_connector_set_property,
1139 	.destroy = nouveau_connector_destroy,
1140 	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
1141 	.atomic_destroy_state = nouveau_conn_atomic_destroy_state,
1142 	.atomic_set_property = nouveau_conn_atomic_set_property,
1143 	.atomic_get_property = nouveau_conn_atomic_get_property,
1144 	.late_register = nouveau_connector_late_register,
1145 	.early_unregister = nouveau_connector_early_unregister,
1146 };
1147 
1148 static const struct drm_connector_funcs
1149 nouveau_connector_funcs_lvds = {
1150 	.dpms = drm_helper_connector_dpms,
1151 	.reset = nouveau_conn_reset,
1152 	.detect = nouveau_connector_detect_lvds,
1153 	.force = nouveau_connector_force,
1154 	.fill_modes = drm_helper_probe_single_connector_modes,
1155 	.set_property = nouveau_connector_set_property,
1156 	.destroy = nouveau_connector_destroy,
1157 	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
1158 	.atomic_destroy_state = nouveau_conn_atomic_destroy_state,
1159 	.atomic_set_property = nouveau_conn_atomic_set_property,
1160 	.atomic_get_property = nouveau_conn_atomic_get_property,
1161 	.late_register = nouveau_connector_late_register,
1162 	.early_unregister = nouveau_connector_early_unregister,
1163 };
1164 
1165 void
1166 nouveau_connector_hpd(struct nouveau_connector *nv_connector, u64 bits)
1167 {
1168 	struct nouveau_drm *drm = nouveau_drm(nv_connector->base.dev);
1169 	u32 mask = drm_connector_mask(&nv_connector->base);
1170 	unsigned long flags;
1171 
1172 	spin_lock_irqsave(&drm->hpd_lock, flags);
1173 	if (!(drm->hpd_pending & mask)) {
1174 		nv_connector->hpd_pending |= bits;
1175 		drm->hpd_pending |= mask;
1176 		schedule_work(&drm->hpd_work);
1177 	}
1178 	spin_unlock_irqrestore(&drm->hpd_lock, flags);
1179 }
1180 
1181 static int
1182 nouveau_connector_irq(struct nvif_event *event, void *repv, u32 repc)
1183 {
1184 	struct nouveau_connector *nv_connector = container_of(event, typeof(*nv_connector), irq);
1185 
1186 	schedule_work(&nv_connector->irq_work);
1187 	return NVIF_EVENT_KEEP;
1188 }
1189 
1190 static int
1191 nouveau_connector_hotplug(struct nvif_event *event, void *repv, u32 repc)
1192 {
1193 	struct nouveau_connector *nv_connector = container_of(event, typeof(*nv_connector), hpd);
1194 	struct nvif_conn_event_v0 *rep = repv;
1195 
1196 	nouveau_connector_hpd(nv_connector, rep->types);
1197 	return NVIF_EVENT_KEEP;
1198 }
1199 
1200 static ssize_t
1201 nouveau_connector_aux_xfer(struct drm_dp_aux *obj, struct drm_dp_aux_msg *msg)
1202 {
1203 	struct nouveau_connector *nv_connector =
1204 		container_of(obj, typeof(*nv_connector), aux);
1205 	struct nouveau_encoder *nv_encoder;
1206 	struct nvkm_i2c_aux *aux;
1207 	u8 size = msg->size;
1208 	int ret;
1209 
1210 	nv_encoder = find_encoder(&nv_connector->base, DCB_OUTPUT_DP);
1211 	if (!nv_encoder || !(aux = nv_encoder->aux))
1212 		return -ENODEV;
1213 	if (WARN_ON(msg->size > 16))
1214 		return -E2BIG;
1215 
1216 	ret = nvkm_i2c_aux_acquire(aux);
1217 	if (ret)
1218 		return ret;
1219 
1220 	ret = nvkm_i2c_aux_xfer(aux, false, msg->request, msg->address,
1221 				msg->buffer, &size);
1222 	nvkm_i2c_aux_release(aux);
1223 	if (ret >= 0) {
1224 		msg->reply = ret;
1225 		return size;
1226 	}
1227 
1228 	return ret;
1229 }
1230 
1231 static int
1232 drm_conntype_from_dcb(enum dcb_connector_type dcb)
1233 {
1234 	switch (dcb) {
1235 	case DCB_CONNECTOR_VGA      : return DRM_MODE_CONNECTOR_VGA;
1236 	case DCB_CONNECTOR_TV_0     :
1237 	case DCB_CONNECTOR_TV_1     :
1238 	case DCB_CONNECTOR_TV_3     : return DRM_MODE_CONNECTOR_TV;
1239 	case DCB_CONNECTOR_DMS59_0  :
1240 	case DCB_CONNECTOR_DMS59_1  :
1241 	case DCB_CONNECTOR_DVI_I    : return DRM_MODE_CONNECTOR_DVII;
1242 	case DCB_CONNECTOR_DVI_D    : return DRM_MODE_CONNECTOR_DVID;
1243 	case DCB_CONNECTOR_LVDS     :
1244 	case DCB_CONNECTOR_LVDS_SPWG: return DRM_MODE_CONNECTOR_LVDS;
1245 	case DCB_CONNECTOR_DMS59_DP0:
1246 	case DCB_CONNECTOR_DMS59_DP1:
1247 	case DCB_CONNECTOR_DP       :
1248 	case DCB_CONNECTOR_mDP      :
1249 	case DCB_CONNECTOR_USB_C    : return DRM_MODE_CONNECTOR_DisplayPort;
1250 	case DCB_CONNECTOR_eDP      : return DRM_MODE_CONNECTOR_eDP;
1251 	case DCB_CONNECTOR_HDMI_0   :
1252 	case DCB_CONNECTOR_HDMI_1   :
1253 	case DCB_CONNECTOR_HDMI_C   : return DRM_MODE_CONNECTOR_HDMIA;
1254 	case DCB_CONNECTOR_WFD	    : return DRM_MODE_CONNECTOR_VIRTUAL;
1255 	default:
1256 		break;
1257 	}
1258 
1259 	return DRM_MODE_CONNECTOR_Unknown;
1260 }
1261 
1262 struct drm_connector *
1263 nouveau_connector_create(struct drm_device *dev,
1264 			 const struct dcb_output *dcbe)
1265 {
1266 	const struct drm_connector_funcs *funcs = &nouveau_connector_funcs;
1267 	struct nouveau_drm *drm = nouveau_drm(dev);
1268 	struct nouveau_display *disp = nouveau_display(dev);
1269 	struct nouveau_connector *nv_connector = NULL;
1270 	struct drm_connector *connector;
1271 	struct drm_connector_list_iter conn_iter;
1272 	char aux_name[48] = {0};
1273 	int index = dcbe->connector;
1274 	int type, ret = 0;
1275 	bool dummy;
1276 
1277 	drm_connector_list_iter_begin(dev, &conn_iter);
1278 	nouveau_for_each_non_mst_connector_iter(connector, &conn_iter) {
1279 		nv_connector = nouveau_connector(connector);
1280 		if (nv_connector->index == index) {
1281 			drm_connector_list_iter_end(&conn_iter);
1282 			return connector;
1283 		}
1284 	}
1285 	drm_connector_list_iter_end(&conn_iter);
1286 
1287 	nv_connector = kzalloc(sizeof(*nv_connector), GFP_KERNEL);
1288 	if (!nv_connector)
1289 		return ERR_PTR(-ENOMEM);
1290 
1291 	connector = &nv_connector->base;
1292 	nv_connector->index = index;
1293 	INIT_WORK(&nv_connector->irq_work, nouveau_dp_irq);
1294 
1295 	/* attempt to parse vbios connector type and hotplug gpio */
1296 	nv_connector->dcb = olddcb_conn(dev, index);
1297 	if (nv_connector->dcb) {
1298 		u32 entry = ROM16(nv_connector->dcb[0]);
1299 		if (olddcb_conntab(dev)[3] >= 4)
1300 			entry |= (u32)ROM16(nv_connector->dcb[2]) << 16;
1301 
1302 		nv_connector->type = nv_connector->dcb[0];
1303 		if (drm_conntype_from_dcb(nv_connector->type) ==
1304 					  DRM_MODE_CONNECTOR_Unknown) {
1305 			NV_WARN(drm, "unknown connector type %02x\n",
1306 				nv_connector->type);
1307 			nv_connector->type = DCB_CONNECTOR_NONE;
1308 		}
1309 
1310 		/* Gigabyte NX85T */
1311 		if (nv_match_device(dev, 0x0421, 0x1458, 0x344c)) {
1312 			if (nv_connector->type == DCB_CONNECTOR_HDMI_1)
1313 				nv_connector->type = DCB_CONNECTOR_DVI_I;
1314 		}
1315 
1316 		/* Gigabyte GV-NX86T512H */
1317 		if (nv_match_device(dev, 0x0402, 0x1458, 0x3455)) {
1318 			if (nv_connector->type == DCB_CONNECTOR_HDMI_1)
1319 				nv_connector->type = DCB_CONNECTOR_DVI_I;
1320 		}
1321 	} else {
1322 		nv_connector->type = DCB_CONNECTOR_NONE;
1323 	}
1324 
1325 	/* no vbios data, or an unknown dcb connector type - attempt to
1326 	 * figure out something suitable ourselves
1327 	 */
1328 	if (nv_connector->type == DCB_CONNECTOR_NONE) {
1329 		struct nouveau_drm *drm = nouveau_drm(dev);
1330 		struct dcb_table *dcbt = &drm->vbios.dcb;
1331 		u32 encoders = 0;
1332 		int i;
1333 
1334 		for (i = 0; i < dcbt->entries; i++) {
1335 			if (dcbt->entry[i].connector == nv_connector->index)
1336 				encoders |= (1 << dcbt->entry[i].type);
1337 		}
1338 
1339 		if (encoders & (1 << DCB_OUTPUT_DP)) {
1340 			if (encoders & (1 << DCB_OUTPUT_TMDS))
1341 				nv_connector->type = DCB_CONNECTOR_DP;
1342 			else
1343 				nv_connector->type = DCB_CONNECTOR_eDP;
1344 		} else
1345 		if (encoders & (1 << DCB_OUTPUT_TMDS)) {
1346 			if (encoders & (1 << DCB_OUTPUT_ANALOG))
1347 				nv_connector->type = DCB_CONNECTOR_DVI_I;
1348 			else
1349 				nv_connector->type = DCB_CONNECTOR_DVI_D;
1350 		} else
1351 		if (encoders & (1 << DCB_OUTPUT_ANALOG)) {
1352 			nv_connector->type = DCB_CONNECTOR_VGA;
1353 		} else
1354 		if (encoders & (1 << DCB_OUTPUT_LVDS)) {
1355 			nv_connector->type = DCB_CONNECTOR_LVDS;
1356 		} else
1357 		if (encoders & (1 << DCB_OUTPUT_TV)) {
1358 			nv_connector->type = DCB_CONNECTOR_TV_0;
1359 		}
1360 	}
1361 
1362 	switch ((type = drm_conntype_from_dcb(nv_connector->type))) {
1363 	case DRM_MODE_CONNECTOR_LVDS:
1364 		ret = nouveau_bios_parse_lvds_table(dev, 0, &dummy, &dummy);
1365 		if (ret) {
1366 			NV_ERROR(drm, "Error parsing LVDS table, disabling\n");
1367 			kfree(nv_connector);
1368 			return ERR_PTR(ret);
1369 		}
1370 
1371 		funcs = &nouveau_connector_funcs_lvds;
1372 		break;
1373 	case DRM_MODE_CONNECTOR_DisplayPort:
1374 	case DRM_MODE_CONNECTOR_eDP:
1375 		nv_connector->aux.dev = connector->kdev;
1376 		nv_connector->aux.drm_dev = dev;
1377 		nv_connector->aux.transfer = nouveau_connector_aux_xfer;
1378 		snprintf(aux_name, sizeof(aux_name), "sor-%04x-%04x",
1379 			 dcbe->hasht, dcbe->hashm);
1380 		nv_connector->aux.name = kstrdup(aux_name, GFP_KERNEL);
1381 		if (!nv_connector->aux.name) {
1382 			kfree(nv_connector);
1383 			return ERR_PTR(-ENOMEM);
1384 		}
1385 		drm_dp_aux_init(&nv_connector->aux);
1386 		break;
1387 	default:
1388 		funcs = &nouveau_connector_funcs;
1389 		break;
1390 	}
1391 
1392 	/* HDMI 3D support */
1393 	if ((disp->disp.object.oclass >= G82_DISP)
1394 	    && ((type == DRM_MODE_CONNECTOR_DisplayPort)
1395 		|| (type == DRM_MODE_CONNECTOR_eDP)
1396 		|| (type == DRM_MODE_CONNECTOR_HDMIA)))
1397 		connector->stereo_allowed = true;
1398 
1399 	/* defaults, will get overridden in detect() */
1400 	connector->interlace_allowed = false;
1401 	connector->doublescan_allowed = false;
1402 
1403 	drm_connector_init(dev, connector, funcs, type);
1404 	drm_connector_helper_add(connector, &nouveau_connector_helper_funcs);
1405 	connector->polled = DRM_CONNECTOR_POLL_CONNECT;
1406 
1407 	if (nv_connector->dcb && (disp->disp.conn_mask & BIT(nv_connector->index))) {
1408 		ret = nvif_conn_ctor(&disp->disp, nv_connector->base.name, nv_connector->index,
1409 				     &nv_connector->conn);
1410 		if (ret) {
1411 			kfree(nv_connector);
1412 			return ERR_PTR(ret);
1413 		}
1414 
1415 		ret = nvif_conn_event_ctor(&nv_connector->conn, "kmsHotplug",
1416 					   nouveau_connector_hotplug,
1417 					   NVIF_CONN_EVENT_V0_PLUG | NVIF_CONN_EVENT_V0_UNPLUG,
1418 					   &nv_connector->hpd);
1419 		if (ret == 0)
1420 			connector->polled = DRM_CONNECTOR_POLL_HPD;
1421 
1422 		if (nv_connector->aux.transfer) {
1423 			ret = nvif_conn_event_ctor(&nv_connector->conn, "kmsDpIrq",
1424 						   nouveau_connector_irq, NVIF_CONN_EVENT_V0_IRQ,
1425 						   &nv_connector->irq);
1426 			if (ret) {
1427 				nvif_event_dtor(&nv_connector->hpd);
1428 				nvif_conn_dtor(&nv_connector->conn);
1429 				kfree(nv_connector);
1430 				return ERR_PTR(ret);
1431 			}
1432 		}
1433 	}
1434 
1435 	connector->funcs->reset(connector);
1436 	nouveau_conn_attach_properties(connector);
1437 
1438 	/* Default scaling mode */
1439 	switch (nv_connector->type) {
1440 	case DCB_CONNECTOR_LVDS:
1441 	case DCB_CONNECTOR_LVDS_SPWG:
1442 	case DCB_CONNECTOR_eDP:
1443 		/* see note in nouveau_connector_set_property() */
1444 		if (disp->disp.object.oclass < NV50_DISP) {
1445 			nv_connector->scaling_mode = DRM_MODE_SCALE_FULLSCREEN;
1446 			break;
1447 		}
1448 		nv_connector->scaling_mode = DRM_MODE_SCALE_NONE;
1449 		break;
1450 	default:
1451 		nv_connector->scaling_mode = DRM_MODE_SCALE_NONE;
1452 		break;
1453 	}
1454 
1455 	/* dithering properties */
1456 	switch (nv_connector->type) {
1457 	case DCB_CONNECTOR_TV_0:
1458 	case DCB_CONNECTOR_TV_1:
1459 	case DCB_CONNECTOR_TV_3:
1460 	case DCB_CONNECTOR_VGA:
1461 		break;
1462 	default:
1463 		nv_connector->dithering_mode = DITHERING_MODE_AUTO;
1464 		break;
1465 	}
1466 
1467 	switch (type) {
1468 	case DRM_MODE_CONNECTOR_DisplayPort:
1469 		nv_connector->dp_encoder = find_encoder(&nv_connector->base, DCB_OUTPUT_DP);
1470 		fallthrough;
1471 	case DRM_MODE_CONNECTOR_eDP:
1472 		drm_dp_cec_register_connector(&nv_connector->aux, connector);
1473 		break;
1474 	}
1475 
1476 	drm_connector_register(connector);
1477 	return connector;
1478 }
1479