xref: /linux/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c (revision fcc8487d477a3452a1d0ccbdd4c5e0e1e3cb8bed)
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 "outp.h"
27 
28 #include <core/client.h>
29 #include <core/notify.h>
30 #include <core/oproxy.h>
31 #include <subdev/bios.h>
32 #include <subdev/bios/dcb.h>
33 
34 #include <nvif/class.h>
35 #include <nvif/cl0046.h>
36 #include <nvif/event.h>
37 #include <nvif/unpack.h>
38 
39 static void
40 nvkm_disp_vblank_fini(struct nvkm_event *event, int type, int head)
41 {
42 	struct nvkm_disp *disp = container_of(event, typeof(*disp), vblank);
43 	disp->func->head.vblank_fini(disp, head);
44 }
45 
46 static void
47 nvkm_disp_vblank_init(struct nvkm_event *event, int type, int head)
48 {
49 	struct nvkm_disp *disp = container_of(event, typeof(*disp), vblank);
50 	disp->func->head.vblank_init(disp, head);
51 }
52 
53 static int
54 nvkm_disp_vblank_ctor(struct nvkm_object *object, void *data, u32 size,
55 		      struct nvkm_notify *notify)
56 {
57 	struct nvkm_disp *disp =
58 		container_of(notify->event, typeof(*disp), vblank);
59 	union {
60 		struct nvif_notify_head_req_v0 v0;
61 	} *req = data;
62 	int ret = -ENOSYS;
63 
64 	if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, false))) {
65 		notify->size = sizeof(struct nvif_notify_head_rep_v0);
66 		if (ret = -ENXIO, req->v0.head <= disp->vblank.index_nr) {
67 			notify->types = 1;
68 			notify->index = req->v0.head;
69 			return 0;
70 		}
71 	}
72 
73 	return ret;
74 }
75 
76 static const struct nvkm_event_func
77 nvkm_disp_vblank_func = {
78 	.ctor = nvkm_disp_vblank_ctor,
79 	.init = nvkm_disp_vblank_init,
80 	.fini = nvkm_disp_vblank_fini,
81 };
82 
83 void
84 nvkm_disp_vblank(struct nvkm_disp *disp, int head)
85 {
86 	struct nvif_notify_head_rep_v0 rep = {};
87 	nvkm_event_send(&disp->vblank, 1, head, &rep, sizeof(rep));
88 }
89 
90 static int
91 nvkm_disp_hpd_ctor(struct nvkm_object *object, void *data, u32 size,
92 		   struct nvkm_notify *notify)
93 {
94 	struct nvkm_disp *disp =
95 		container_of(notify->event, typeof(*disp), hpd);
96 	union {
97 		struct nvif_notify_conn_req_v0 v0;
98 	} *req = data;
99 	struct nvkm_output *outp;
100 	int ret = -ENOSYS;
101 
102 	if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, false))) {
103 		notify->size = sizeof(struct nvif_notify_conn_rep_v0);
104 		list_for_each_entry(outp, &disp->outp, head) {
105 			if (ret = -ENXIO, outp->conn->index == req->v0.conn) {
106 				if (ret = -ENODEV, outp->conn->hpd.event) {
107 					notify->types = req->v0.mask;
108 					notify->index = req->v0.conn;
109 					ret = 0;
110 				}
111 				break;
112 			}
113 		}
114 	}
115 
116 	return ret;
117 }
118 
119 static const struct nvkm_event_func
120 nvkm_disp_hpd_func = {
121 	.ctor = nvkm_disp_hpd_ctor
122 };
123 
124 int
125 nvkm_disp_ntfy(struct nvkm_object *object, u32 type, struct nvkm_event **event)
126 {
127 	struct nvkm_disp *disp = nvkm_disp(object->engine);
128 	switch (type) {
129 	case NV04_DISP_NTFY_VBLANK:
130 		*event = &disp->vblank;
131 		return 0;
132 	case NV04_DISP_NTFY_CONN:
133 		*event = &disp->hpd;
134 		return 0;
135 	default:
136 		break;
137 	}
138 	return -EINVAL;
139 }
140 
141 static void
142 nvkm_disp_class_del(struct nvkm_oproxy *oproxy)
143 {
144 	struct nvkm_disp *disp = nvkm_disp(oproxy->base.engine);
145 	mutex_lock(&disp->engine.subdev.mutex);
146 	if (disp->client == oproxy)
147 		disp->client = NULL;
148 	mutex_unlock(&disp->engine.subdev.mutex);
149 }
150 
151 static const struct nvkm_oproxy_func
152 nvkm_disp_class = {
153 	.dtor[1] = nvkm_disp_class_del,
154 };
155 
156 static int
157 nvkm_disp_class_new(struct nvkm_device *device,
158 		    const struct nvkm_oclass *oclass, void *data, u32 size,
159 		    struct nvkm_object **pobject)
160 {
161 	const struct nvkm_disp_oclass *sclass = oclass->engn;
162 	struct nvkm_disp *disp = nvkm_disp(oclass->engine);
163 	struct nvkm_oproxy *oproxy;
164 	int ret;
165 
166 	ret = nvkm_oproxy_new_(&nvkm_disp_class, oclass, &oproxy);
167 	if (ret)
168 		return ret;
169 	*pobject = &oproxy->base;
170 
171 	mutex_lock(&disp->engine.subdev.mutex);
172 	if (disp->client) {
173 		mutex_unlock(&disp->engine.subdev.mutex);
174 		return -EBUSY;
175 	}
176 	disp->client = oproxy;
177 	mutex_unlock(&disp->engine.subdev.mutex);
178 
179 	return sclass->ctor(disp, oclass, data, size, &oproxy->object);
180 }
181 
182 static const struct nvkm_device_oclass
183 nvkm_disp_sclass = {
184 	.ctor = nvkm_disp_class_new,
185 };
186 
187 static int
188 nvkm_disp_class_get(struct nvkm_oclass *oclass, int index,
189 		    const struct nvkm_device_oclass **class)
190 {
191 	struct nvkm_disp *disp = nvkm_disp(oclass->engine);
192 	if (index == 0) {
193 		const struct nvkm_disp_oclass *root = disp->func->root(disp);
194 		oclass->base = root->base;
195 		oclass->engn = root;
196 		*class = &nvkm_disp_sclass;
197 		return 0;
198 	}
199 	return 1;
200 }
201 
202 static void
203 nvkm_disp_intr(struct nvkm_engine *engine)
204 {
205 	struct nvkm_disp *disp = nvkm_disp(engine);
206 	disp->func->intr(disp);
207 }
208 
209 static int
210 nvkm_disp_fini(struct nvkm_engine *engine, bool suspend)
211 {
212 	struct nvkm_disp *disp = nvkm_disp(engine);
213 	struct nvkm_connector *conn;
214 	struct nvkm_output *outp;
215 
216 	list_for_each_entry(outp, &disp->outp, head) {
217 		nvkm_output_fini(outp);
218 	}
219 
220 	list_for_each_entry(conn, &disp->conn, head) {
221 		nvkm_connector_fini(conn);
222 	}
223 
224 	return 0;
225 }
226 
227 static int
228 nvkm_disp_init(struct nvkm_engine *engine)
229 {
230 	struct nvkm_disp *disp = nvkm_disp(engine);
231 	struct nvkm_connector *conn;
232 	struct nvkm_output *outp;
233 
234 	list_for_each_entry(conn, &disp->conn, head) {
235 		nvkm_connector_init(conn);
236 	}
237 
238 	list_for_each_entry(outp, &disp->outp, head) {
239 		nvkm_output_init(outp);
240 	}
241 
242 	return 0;
243 }
244 
245 static void *
246 nvkm_disp_dtor(struct nvkm_engine *engine)
247 {
248 	struct nvkm_disp *disp = nvkm_disp(engine);
249 	struct nvkm_connector *conn;
250 	struct nvkm_output *outp;
251 	void *data = disp;
252 
253 	if (disp->func->dtor)
254 		data = disp->func->dtor(disp);
255 
256 	nvkm_event_fini(&disp->vblank);
257 	nvkm_event_fini(&disp->hpd);
258 
259 	while (!list_empty(&disp->outp)) {
260 		outp = list_first_entry(&disp->outp, typeof(*outp), head);
261 		list_del(&outp->head);
262 		nvkm_output_del(&outp);
263 	}
264 
265 	while (!list_empty(&disp->conn)) {
266 		conn = list_first_entry(&disp->conn, typeof(*conn), head);
267 		list_del(&conn->head);
268 		nvkm_connector_del(&conn);
269 	}
270 
271 	return data;
272 }
273 
274 static const struct nvkm_engine_func
275 nvkm_disp = {
276 	.dtor = nvkm_disp_dtor,
277 	.init = nvkm_disp_init,
278 	.fini = nvkm_disp_fini,
279 	.intr = nvkm_disp_intr,
280 	.base.sclass = nvkm_disp_class_get,
281 };
282 
283 int
284 nvkm_disp_ctor(const struct nvkm_disp_func *func, struct nvkm_device *device,
285 	       int index, int heads, struct nvkm_disp *disp)
286 {
287 	struct nvkm_bios *bios = device->bios;
288 	struct nvkm_output *outp, *outt, *pair;
289 	struct nvkm_connector *conn;
290 	struct nvbios_connE connE;
291 	struct dcb_output dcbE;
292 	u8  hpd = 0, ver, hdr;
293 	u32 data;
294 	int ret, i;
295 
296 	INIT_LIST_HEAD(&disp->outp);
297 	INIT_LIST_HEAD(&disp->conn);
298 	disp->func = func;
299 	disp->head.nr = heads;
300 
301 	ret = nvkm_engine_ctor(&nvkm_disp, device, index, true, &disp->engine);
302 	if (ret)
303 		return ret;
304 
305 	/* create output objects for each display path in the vbios */
306 	i = -1;
307 	while ((data = dcb_outp_parse(bios, ++i, &ver, &hdr, &dcbE))) {
308 		const struct nvkm_disp_func_outp *outps;
309 		int (*ctor)(struct nvkm_disp *, int, struct dcb_output *,
310 			    struct nvkm_output **);
311 
312 		if (dcbE.type == DCB_OUTPUT_UNUSED)
313 			continue;
314 		if (dcbE.type == DCB_OUTPUT_EOL)
315 			break;
316 		outp = NULL;
317 
318 		switch (dcbE.location) {
319 		case 0: outps = &disp->func->outp.internal; break;
320 		case 1: outps = &disp->func->outp.external; break;
321 		default:
322 			nvkm_warn(&disp->engine.subdev,
323 				  "dcb %d locn %d unknown\n", i, dcbE.location);
324 			continue;
325 		}
326 
327 		switch (dcbE.type) {
328 		case DCB_OUTPUT_ANALOG: ctor = outps->crt ; break;
329 		case DCB_OUTPUT_TV    : ctor = outps->tv  ; break;
330 		case DCB_OUTPUT_TMDS  : ctor = outps->tmds; break;
331 		case DCB_OUTPUT_LVDS  : ctor = outps->lvds; break;
332 		case DCB_OUTPUT_DP    : ctor = outps->dp  ; break;
333 		default:
334 			nvkm_warn(&disp->engine.subdev,
335 				  "dcb %d type %d unknown\n", i, dcbE.type);
336 			continue;
337 		}
338 
339 		if (ctor)
340 			ret = ctor(disp, i, &dcbE, &outp);
341 		else
342 			ret = -ENODEV;
343 
344 		if (ret) {
345 			if (ret == -ENODEV) {
346 				nvkm_debug(&disp->engine.subdev,
347 					   "dcb %d %d/%d not supported\n",
348 					   i, dcbE.location, dcbE.type);
349 				continue;
350 			}
351 			nvkm_error(&disp->engine.subdev,
352 				   "failed to create output %d\n", i);
353 			nvkm_output_del(&outp);
354 			continue;
355 		}
356 
357 		list_add_tail(&outp->head, &disp->outp);
358 		hpd = max(hpd, (u8)(dcbE.connector + 1));
359 	}
360 
361 	/* create connector objects based on the outputs we support */
362 	list_for_each_entry_safe(outp, outt, &disp->outp, head) {
363 		/* bios data *should* give us the most useful information */
364 		data = nvbios_connEp(bios, outp->info.connector, &ver, &hdr,
365 				     &connE);
366 
367 		/* no bios connector data... */
368 		if (!data) {
369 			/* heuristic: anything with the same ccb index is
370 			 * considered to be on the same connector, any
371 			 * output path without an associated ccb entry will
372 			 * be put on its own connector
373 			 */
374 			int ccb_index = outp->info.i2c_index;
375 			if (ccb_index != 0xf) {
376 				list_for_each_entry(pair, &disp->outp, head) {
377 					if (pair->info.i2c_index == ccb_index) {
378 						outp->conn = pair->conn;
379 						break;
380 					}
381 				}
382 			}
383 
384 			/* connector shared with another output path */
385 			if (outp->conn)
386 				continue;
387 
388 			memset(&connE, 0x00, sizeof(connE));
389 			connE.type = DCB_CONNECTOR_NONE;
390 			i = -1;
391 		} else {
392 			i = outp->info.connector;
393 		}
394 
395 		/* check that we haven't already created this connector */
396 		list_for_each_entry(conn, &disp->conn, head) {
397 			if (conn->index == outp->info.connector) {
398 				outp->conn = conn;
399 				break;
400 			}
401 		}
402 
403 		if (outp->conn)
404 			continue;
405 
406 		/* apparently we need to create a new one! */
407 		ret = nvkm_connector_new(disp, i, &connE, &outp->conn);
408 		if (ret) {
409 			nvkm_error(&disp->engine.subdev,
410 				   "failed to create output %d conn: %d\n",
411 				   outp->index, ret);
412 			nvkm_connector_del(&outp->conn);
413 			list_del(&outp->head);
414 			nvkm_output_del(&outp);
415 			continue;
416 		}
417 
418 		list_add_tail(&outp->conn->head, &disp->conn);
419 	}
420 
421 	ret = nvkm_event_init(&nvkm_disp_hpd_func, 3, hpd, &disp->hpd);
422 	if (ret)
423 		return ret;
424 
425 	ret = nvkm_event_init(&nvkm_disp_vblank_func, 1, heads, &disp->vblank);
426 	if (ret)
427 		return ret;
428 
429 	return 0;
430 }
431 
432 int
433 nvkm_disp_new_(const struct nvkm_disp_func *func, struct nvkm_device *device,
434 	       int index, int heads, struct nvkm_disp **pdisp)
435 {
436 	if (!(*pdisp = kzalloc(sizeof(**pdisp), GFP_KERNEL)))
437 		return -ENOMEM;
438 	return nvkm_disp_ctor(func, device, index, heads, *pdisp);
439 }
440