1 /*
2  * Copyright 2013 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Ben Skeggs
23  */
24 #include "priv.h"
25 #include "conn.h"
26 #include "dp.h"
27 #include "head.h"
28 #include "ior.h"
29 #include "outp.h"
30 
31 #include <core/client.h>
32 #include <core/notify.h>
33 #include <core/ramht.h>
34 #include <subdev/bios.h>
35 #include <subdev/bios/dcb.h>
36 
37 #include <nvif/class.h>
38 #include <nvif/cl0046.h>
39 #include <nvif/event.h>
40 #include <nvif/unpack.h>
41 
42 static void
43 nvkm_disp_vblank_fini(struct nvkm_event *event, int type, int id)
44 {
45 	struct nvkm_disp *disp = container_of(event, typeof(*disp), vblank);
46 	struct nvkm_head *head = nvkm_head_find(disp, id);
47 	if (head)
48 		head->func->vblank_put(head);
49 }
50 
51 static void
52 nvkm_disp_vblank_init(struct nvkm_event *event, int type, int id)
53 {
54 	struct nvkm_disp *disp = container_of(event, typeof(*disp), vblank);
55 	struct nvkm_head *head = nvkm_head_find(disp, id);
56 	if (head)
57 		head->func->vblank_get(head);
58 }
59 
60 static int
61 nvkm_disp_vblank_ctor(struct nvkm_object *object, void *data, u32 size,
62 		      struct nvkm_notify *notify)
63 {
64 	struct nvkm_disp *disp =
65 		container_of(notify->event, typeof(*disp), vblank);
66 	union {
67 		struct nvif_notify_head_req_v0 v0;
68 	} *req = data;
69 	int ret = -ENOSYS;
70 
71 	if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, false))) {
72 		notify->size = sizeof(struct nvif_notify_head_rep_v0);
73 		if (ret = -ENXIO, req->v0.head <= disp->vblank.index_nr) {
74 			notify->types = 1;
75 			notify->index = req->v0.head;
76 			return 0;
77 		}
78 	}
79 
80 	return ret;
81 }
82 
83 static const struct nvkm_event_func
84 nvkm_disp_vblank_func = {
85 	.ctor = nvkm_disp_vblank_ctor,
86 	.init = nvkm_disp_vblank_init,
87 	.fini = nvkm_disp_vblank_fini,
88 };
89 
90 void
91 nvkm_disp_vblank(struct nvkm_disp *disp, int head)
92 {
93 	struct nvif_notify_head_rep_v0 rep = {};
94 	nvkm_event_send(&disp->vblank, 1, head, &rep, sizeof(rep));
95 }
96 
97 static int
98 nvkm_disp_hpd_ctor(struct nvkm_object *object, void *data, u32 size,
99 		   struct nvkm_notify *notify)
100 {
101 	struct nvkm_disp *disp =
102 		container_of(notify->event, typeof(*disp), hpd);
103 	union {
104 		struct nvif_notify_conn_req_v0 v0;
105 	} *req = data;
106 	struct nvkm_outp *outp;
107 	int ret = -ENOSYS;
108 
109 	if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, false))) {
110 		notify->size = sizeof(struct nvif_notify_conn_rep_v0);
111 		list_for_each_entry(outp, &disp->outps, head) {
112 			if (ret = -ENXIO, outp->conn->index == req->v0.conn) {
113 				if (ret = -ENODEV, outp->conn->hpd.event) {
114 					notify->types = req->v0.mask;
115 					notify->index = req->v0.conn;
116 					ret = 0;
117 				}
118 				break;
119 			}
120 		}
121 	}
122 
123 	return ret;
124 }
125 
126 static const struct nvkm_event_func
127 nvkm_disp_hpd_func = {
128 	.ctor = nvkm_disp_hpd_ctor
129 };
130 
131 int
132 nvkm_disp_ntfy(struct nvkm_object *object, u32 type, struct nvkm_event **event)
133 {
134 	struct nvkm_disp *disp = nvkm_disp(object->engine);
135 	switch (type) {
136 	case NV04_DISP_NTFY_VBLANK:
137 		*event = &disp->vblank;
138 		return 0;
139 	case NV04_DISP_NTFY_CONN:
140 		*event = &disp->hpd;
141 		return 0;
142 	default:
143 		break;
144 	}
145 	return -EINVAL;
146 }
147 
148 static int
149 nvkm_disp_class_new(struct nvkm_device *device,
150 		    const struct nvkm_oclass *oclass, void *data, u32 size,
151 		    struct nvkm_object **pobject)
152 {
153 	return nvkm_udisp_new(oclass, data, size, pobject);
154 }
155 
156 static const struct nvkm_device_oclass
157 nvkm_disp_sclass = {
158 	.ctor = nvkm_disp_class_new,
159 };
160 
161 static int
162 nvkm_disp_class_get(struct nvkm_oclass *oclass, int index,
163 		    const struct nvkm_device_oclass **class)
164 {
165 	struct nvkm_disp *disp = nvkm_disp(oclass->engine);
166 	if (index == 0) {
167 		oclass->base = disp->func->root;
168 		*class = &nvkm_disp_sclass;
169 		return 0;
170 	}
171 	return 1;
172 }
173 
174 static void
175 nvkm_disp_intr(struct nvkm_engine *engine)
176 {
177 	struct nvkm_disp *disp = nvkm_disp(engine);
178 	disp->func->intr(disp);
179 }
180 
181 static int
182 nvkm_disp_fini(struct nvkm_engine *engine, bool suspend)
183 {
184 	struct nvkm_disp *disp = nvkm_disp(engine);
185 	struct nvkm_conn *conn;
186 	struct nvkm_outp *outp;
187 
188 	if (disp->func->fini)
189 		disp->func->fini(disp);
190 
191 	list_for_each_entry(outp, &disp->outps, head) {
192 		nvkm_outp_fini(outp);
193 	}
194 
195 	list_for_each_entry(conn, &disp->conns, head) {
196 		nvkm_conn_fini(conn);
197 	}
198 
199 	return 0;
200 }
201 
202 static int
203 nvkm_disp_init(struct nvkm_engine *engine)
204 {
205 	struct nvkm_disp *disp = nvkm_disp(engine);
206 	struct nvkm_conn *conn;
207 	struct nvkm_outp *outp;
208 	struct nvkm_ior *ior;
209 
210 	list_for_each_entry(conn, &disp->conns, head) {
211 		nvkm_conn_init(conn);
212 	}
213 
214 	list_for_each_entry(outp, &disp->outps, head) {
215 		nvkm_outp_init(outp);
216 	}
217 
218 	if (disp->func->init) {
219 		int ret = disp->func->init(disp);
220 		if (ret)
221 			return ret;
222 	}
223 
224 	/* Set 'normal' (ie. when it's attached to a head) state for
225 	 * each output resource to 'fully enabled'.
226 	 */
227 	list_for_each_entry(ior, &disp->iors, head) {
228 		ior->func->power(ior, true, true, true, true, true);
229 	}
230 
231 	return 0;
232 }
233 
234 static int
235 nvkm_disp_oneinit(struct nvkm_engine *engine)
236 {
237 	struct nvkm_disp *disp = nvkm_disp(engine);
238 	struct nvkm_subdev *subdev = &disp->engine.subdev;
239 	struct nvkm_bios *bios = subdev->device->bios;
240 	struct nvkm_outp *outp, *outt, *pair;
241 	struct nvkm_conn *conn;
242 	struct nvkm_head *head;
243 	struct nvkm_ior *ior;
244 	struct nvbios_connE connE;
245 	struct dcb_output dcbE;
246 	u8  hpd = 0, ver, hdr;
247 	u32 data;
248 	int ret, i;
249 
250 	/* Create output path objects for each VBIOS display path. */
251 	i = -1;
252 	while ((data = dcb_outp_parse(bios, ++i, &ver, &hdr, &dcbE))) {
253 		if (ver < 0x40) /* No support for chipsets prior to NV50. */
254 			break;
255 		if (dcbE.type == DCB_OUTPUT_UNUSED)
256 			continue;
257 		if (dcbE.type == DCB_OUTPUT_EOL)
258 			break;
259 		outp = NULL;
260 
261 		switch (dcbE.type) {
262 		case DCB_OUTPUT_ANALOG:
263 		case DCB_OUTPUT_TV:
264 		case DCB_OUTPUT_TMDS:
265 		case DCB_OUTPUT_LVDS:
266 			ret = nvkm_outp_new(disp, i, &dcbE, &outp);
267 			break;
268 		case DCB_OUTPUT_DP:
269 			ret = nvkm_dp_new(disp, i, &dcbE, &outp);
270 			break;
271 		case DCB_OUTPUT_WFD:
272 			/* No support for WFD yet. */
273 			ret = -ENODEV;
274 			continue;
275 		default:
276 			nvkm_warn(subdev, "dcb %d type %d unknown\n",
277 				  i, dcbE.type);
278 			continue;
279 		}
280 
281 		if (ret) {
282 			if (outp) {
283 				if (ret != -ENODEV)
284 					OUTP_ERR(outp, "ctor failed: %d", ret);
285 				else
286 					OUTP_DBG(outp, "not supported");
287 				nvkm_outp_del(&outp);
288 				continue;
289 			}
290 			nvkm_error(subdev, "failed to create outp %d\n", i);
291 			continue;
292 		}
293 
294 		list_add_tail(&outp->head, &disp->outps);
295 		hpd = max(hpd, (u8)(dcbE.connector + 1));
296 	}
297 
298 	/* Create connector objects based on available output paths. */
299 	list_for_each_entry_safe(outp, outt, &disp->outps, head) {
300 		/* VBIOS data *should* give us the most useful information. */
301 		data = nvbios_connEp(bios, outp->info.connector, &ver, &hdr,
302 				     &connE);
303 
304 		/* No bios connector data... */
305 		if (!data) {
306 			/* Heuristic: anything with the same ccb index is
307 			 * considered to be on the same connector, any
308 			 * output path without an associated ccb entry will
309 			 * be put on its own connector.
310 			 */
311 			int ccb_index = outp->info.i2c_index;
312 			if (ccb_index != 0xf) {
313 				list_for_each_entry(pair, &disp->outps, head) {
314 					if (pair->info.i2c_index == ccb_index) {
315 						outp->conn = pair->conn;
316 						break;
317 					}
318 				}
319 			}
320 
321 			/* Connector shared with another output path. */
322 			if (outp->conn)
323 				continue;
324 
325 			memset(&connE, 0x00, sizeof(connE));
326 			connE.type = DCB_CONNECTOR_NONE;
327 			i = -1;
328 		} else {
329 			i = outp->info.connector;
330 		}
331 
332 		/* Check that we haven't already created this connector. */
333 		list_for_each_entry(conn, &disp->conns, head) {
334 			if (conn->index == outp->info.connector) {
335 				outp->conn = conn;
336 				break;
337 			}
338 		}
339 
340 		if (outp->conn)
341 			continue;
342 
343 		/* Apparently we need to create a new one! */
344 		ret = nvkm_conn_new(disp, i, &connE, &outp->conn);
345 		if (ret) {
346 			nvkm_error(&disp->engine.subdev,
347 				   "failed to create outp %d conn: %d\n",
348 				   outp->index, ret);
349 			nvkm_conn_del(&outp->conn);
350 			list_del(&outp->head);
351 			nvkm_outp_del(&outp);
352 			continue;
353 		}
354 
355 		list_add_tail(&outp->conn->head, &disp->conns);
356 	}
357 
358 	ret = nvkm_event_init(&nvkm_disp_hpd_func, 3, hpd, &disp->hpd);
359 	if (ret)
360 		return ret;
361 
362 	if (disp->func->oneinit) {
363 		ret = disp->func->oneinit(disp);
364 		if (ret)
365 			return ret;
366 	}
367 
368 	/* Enforce identity-mapped SOR assignment for panels, which have
369 	 * certain bits (ie. backlight controls) wired to a specific SOR.
370 	 */
371 	list_for_each_entry(outp, &disp->outps, head) {
372 		if (outp->conn->info.type == DCB_CONNECTOR_LVDS ||
373 		    outp->conn->info.type == DCB_CONNECTOR_eDP) {
374 			ior = nvkm_ior_find(disp, SOR, ffs(outp->info.or) - 1);
375 			if (!WARN_ON(!ior))
376 				ior->identity = true;
377 			outp->identity = true;
378 		}
379 	}
380 
381 	i = 0;
382 	list_for_each_entry(head, &disp->heads, head)
383 		i = max(i, head->id + 1);
384 
385 	return nvkm_event_init(&nvkm_disp_vblank_func, 1, i, &disp->vblank);
386 }
387 
388 static void *
389 nvkm_disp_dtor(struct nvkm_engine *engine)
390 {
391 	struct nvkm_disp *disp = nvkm_disp(engine);
392 	struct nvkm_conn *conn;
393 	struct nvkm_outp *outp;
394 	struct nvkm_ior *ior;
395 	struct nvkm_head *head;
396 	void *data = disp;
397 
398 	nvkm_ramht_del(&disp->ramht);
399 	nvkm_gpuobj_del(&disp->inst);
400 
401 	nvkm_event_fini(&disp->uevent);
402 
403 	if (disp->super.wq) {
404 		destroy_workqueue(disp->super.wq);
405 		mutex_destroy(&disp->super.mutex);
406 	}
407 
408 	nvkm_event_fini(&disp->vblank);
409 	nvkm_event_fini(&disp->hpd);
410 
411 	while (!list_empty(&disp->conns)) {
412 		conn = list_first_entry(&disp->conns, typeof(*conn), head);
413 		list_del(&conn->head);
414 		nvkm_conn_del(&conn);
415 	}
416 
417 	while (!list_empty(&disp->outps)) {
418 		outp = list_first_entry(&disp->outps, typeof(*outp), head);
419 		list_del(&outp->head);
420 		nvkm_outp_del(&outp);
421 	}
422 
423 	while (!list_empty(&disp->iors)) {
424 		ior = list_first_entry(&disp->iors, typeof(*ior), head);
425 		nvkm_ior_del(&ior);
426 	}
427 
428 	while (!list_empty(&disp->heads)) {
429 		head = list_first_entry(&disp->heads, typeof(*head), head);
430 		nvkm_head_del(&head);
431 	}
432 
433 	return data;
434 }
435 
436 static const struct nvkm_engine_func
437 nvkm_disp = {
438 	.dtor = nvkm_disp_dtor,
439 	.oneinit = nvkm_disp_oneinit,
440 	.init = nvkm_disp_init,
441 	.fini = nvkm_disp_fini,
442 	.intr = nvkm_disp_intr,
443 	.base.sclass = nvkm_disp_class_get,
444 };
445 
446 int
447 nvkm_disp_new_(const struct nvkm_disp_func *func, struct nvkm_device *device,
448 	       enum nvkm_subdev_type type, int inst, struct nvkm_disp **pdisp)
449 {
450 	struct nvkm_disp *disp;
451 	int ret;
452 
453 	if (!(disp = *pdisp = kzalloc(sizeof(**pdisp), GFP_KERNEL)))
454 		return -ENOMEM;
455 
456 	disp->func = func;
457 	INIT_LIST_HEAD(&disp->heads);
458 	INIT_LIST_HEAD(&disp->iors);
459 	INIT_LIST_HEAD(&disp->outps);
460 	INIT_LIST_HEAD(&disp->conns);
461 	spin_lock_init(&disp->client.lock);
462 
463 	ret = nvkm_engine_ctor(&nvkm_disp, device, type, inst, true, &disp->engine);
464 	if (ret)
465 		return ret;
466 
467 	if (func->super) {
468 		disp->super.wq = create_singlethread_workqueue("nvkm-disp");
469 		if (!disp->super.wq)
470 			return -ENOMEM;
471 
472 		INIT_WORK(&disp->super.work, func->super);
473 		mutex_init(&disp->super.mutex);
474 	}
475 
476 	return nvkm_event_init(func->uevent, 1, ARRAY_SIZE(disp->chan), &disp->uevent);
477 }
478