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staging: drm/imx: Add parallel display support
[deliverable/linux.git] / drivers / staging / imx-drm / imx-drm-core.c
CommitLineData
e692da4d
SH		 1/*
2 * Freescale i.MX drm driver
3 *
4 * Copyright (C) 2011 Sascha Hauer, Pengutronix
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 */
16
17#include <linux/device.h>
18#include <linux/platform_device.h>
19#include <drm/drmP.h>
20#include <drm/drm_fb_helper.h>
21#include <drm/drm_crtc_helper.h>
22#include <linux/fb.h>
23#include <linux/module.h>
24#include <drm/drm_gem_cma_helper.h>
25#include <drm/drm_fb_cma_helper.h>
26
27#include "imx-drm.h"
28
29#define MAX_CRTC 4
30
31struct crtc_cookie {
32 void *cookie;
33 int id;
34 struct list_head list;
35};
36
37struct imx_drm_device {
38 struct drm_device *drm;
39 struct device *dev;
40 struct list_head crtc_list;
41 struct list_head encoder_list;
42 struct list_head connector_list;
43 struct mutex mutex;
44 int references;
45 int pipes;
46 struct drm_fbdev_cma *fbhelper;
47};
48
49struct imx_drm_crtc {
50 struct drm_crtc *crtc;
51 struct list_head list;
52 struct imx_drm_device *imxdrm;
53 int pipe;
54 struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs;
55 struct module *owner;
56 struct crtc_cookie cookie;
57};
58
59struct imx_drm_encoder {
60 struct drm_encoder *encoder;
61 struct list_head list;
62 struct module *owner;
63 struct list_head possible_crtcs;
64};
65
66struct imx_drm_connector {
67 struct drm_connector *connector;
68 struct list_head list;
69 struct module *owner;
70};
71
72static int imx_drm_driver_firstopen(struct drm_device *drm)
73{
74 if (!imx_drm_device_get())
75 return -EINVAL;
76
77 return 0;
78}
79
80static void imx_drm_driver_lastclose(struct drm_device *drm)
81{
82 struct imx_drm_device *imxdrm = drm->dev_private;
83
84 if (imxdrm->fbhelper)
85 drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
86
87 imx_drm_device_put();
88}
89
90static int imx_drm_driver_unload(struct drm_device *drm)
91{
92 struct imx_drm_device *imxdrm = drm->dev_private;
93
94 drm_mode_config_cleanup(imxdrm->drm);
95 drm_kms_helper_poll_fini(imxdrm->drm);
96
97 return 0;
98}
99
100/*
101 * We don't care at all for crtc numbers, but the core expects the
102 * crtcs to be numbered
103 */
104static struct imx_drm_crtc *imx_drm_crtc_by_num(struct imx_drm_device *imxdrm,
105 int num)
106{
107 struct imx_drm_crtc *imx_drm_crtc;
108
109 list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list)
110 if (imx_drm_crtc->pipe == num)
111 return imx_drm_crtc;
112 return NULL;
113}
114
115int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type,
116 u32 interface_pix_fmt)
117{
118 struct imx_drm_device *imxdrm = crtc->dev->dev_private;
119 struct imx_drm_crtc *imx_crtc;
120 struct imx_drm_crtc_helper_funcs *helper;
121
122 mutex_lock(&imxdrm->mutex);
123
124 list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list)
125 if (imx_crtc->crtc == crtc)
126 goto found;
127
128 mutex_unlock(&imxdrm->mutex);
129
130 return -EINVAL;
131found:
132 mutex_unlock(&imxdrm->mutex);
133
134 helper = &imx_crtc->imx_drm_helper_funcs;
135 if (helper->set_interface_pix_fmt)
136 return helper->set_interface_pix_fmt(crtc,
137 encoder_type, interface_pix_fmt);
138 return 0;
139}
140
141int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
142{
143 return drm_vblank_get(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
144}
145EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
146
147void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
148{
149 drm_vblank_put(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
150}
151EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
152
153void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
154{
155 drm_handle_vblank(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
156}
157EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
158
159static int imx_drm_enable_vblank(struct drm_device *drm, int crtc)
160{
161 struct imx_drm_device *imxdrm = drm->dev_private;
162 struct imx_drm_crtc *imx_drm_crtc;
163 int ret;
164
165 imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
166 if (!imx_drm_crtc)
167 return -EINVAL;
168
169 if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
170 return -ENOSYS;
171
172 ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
173 imx_drm_crtc->crtc);
174
175 return ret;
176}
177
178static void imx_drm_disable_vblank(struct drm_device *drm, int crtc)
179{
180 struct imx_drm_device *imxdrm = drm->dev_private;
181 struct imx_drm_crtc *imx_drm_crtc;
182
183 imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
184 if (!imx_drm_crtc)
185 return;
186
187 if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
188 return;
189
190 imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
191}
192
193static const struct file_operations imx_drm_driver_fops = {
194 .owner = THIS_MODULE,
195 .open = drm_open,
196 .release = drm_release,
197 .unlocked_ioctl = drm_ioctl,
198 .mmap = drm_gem_cma_mmap,
199 .poll = drm_poll,
200 .fasync = drm_fasync,
201 .read = drm_read,
202 .llseek = noop_llseek,
203};
204
205static struct imx_drm_device *imx_drm_device;
206
207static struct imx_drm_device *__imx_drm_device(void)
208{
209 return imx_drm_device;
210}
211
212struct drm_device *imx_drm_device_get(void)
213{
214 struct imx_drm_device *imxdrm = __imx_drm_device();
215 struct imx_drm_encoder *enc;
216 struct imx_drm_connector *con;
217 struct imx_drm_crtc *crtc;
218
219 mutex_lock(&imxdrm->mutex);
220
221 list_for_each_entry(enc, &imxdrm->encoder_list, list) {
222 if (!try_module_get(enc->owner)) {
223 dev_err(imxdrm->dev, "could not get module %s\n",
224 module_name(enc->owner));
225 goto unwind_enc;
226 }
227 }
228
229 list_for_each_entry(con, &imxdrm->connector_list, list) {
230 if (!try_module_get(con->owner)) {
231 dev_err(imxdrm->dev, "could not get module %s\n",
232 module_name(con->owner));
233 goto unwind_con;
234 }
235 }
236
237 list_for_each_entry(crtc, &imxdrm->crtc_list, list) {
238 if (!try_module_get(crtc->owner)) {
239 dev_err(imxdrm->dev, "could not get module %s\n",
240 module_name(crtc->owner));
241 goto unwind_crtc;
242 }
243 }
244
245 imxdrm->references++;
246
247 mutex_unlock(&imxdrm->mutex);
248
249 return imxdrm->drm;
250
251unwind_crtc:
252 list_for_each_entry_continue_reverse(crtc, &imxdrm->crtc_list, list)
253 module_put(crtc->owner);
254unwind_con:
255 list_for_each_entry_continue_reverse(con, &imxdrm->connector_list, list)
256 module_put(con->owner);
257unwind_enc:
258 list_for_each_entry_continue_reverse(enc, &imxdrm->encoder_list, list)
259 module_put(enc->owner);
260
261 mutex_unlock(&imxdrm->mutex);
262
263 return NULL;
264
265}
266EXPORT_SYMBOL_GPL(imx_drm_device_get);
267
268void imx_drm_device_put(void)
269{
270 struct imx_drm_device *imxdrm = __imx_drm_device();
271 struct imx_drm_encoder *enc;
272 struct imx_drm_connector *con;
273 struct imx_drm_crtc *crtc;
274
275 mutex_lock(&imxdrm->mutex);
276
277 list_for_each_entry(crtc, &imxdrm->crtc_list, list)
278 module_put(crtc->owner);
279
280 list_for_each_entry(con, &imxdrm->connector_list, list)
281 module_put(con->owner);
282
283 list_for_each_entry(enc, &imxdrm->encoder_list, list)
284 module_put(enc->owner);
285
286 imxdrm->references--;
287
288 mutex_unlock(&imxdrm->mutex);
289}
290EXPORT_SYMBOL_GPL(imx_drm_device_put);
291
292static int drm_mode_group_reinit(struct drm_device *dev)
293{
294 struct drm_mode_group *group = &dev->primary->mode_group;
295 uint32_t *id_list = group->id_list;
296 int ret;
297
298 ret = drm_mode_group_init_legacy_group(dev, group);
299 if (ret < 0)
300 return ret;
301
302 kfree(id_list);
303 return 0;
304}
305
306/*
307 * register an encoder to the drm core
308 */
309static int imx_drm_encoder_register(struct imx_drm_encoder *imx_drm_encoder)
310{
311 struct imx_drm_device *imxdrm = __imx_drm_device();
312
313 INIT_LIST_HEAD(&imx_drm_encoder->possible_crtcs);
314
315 drm_encoder_init(imxdrm->drm, imx_drm_encoder->encoder,
316 imx_drm_encoder->encoder->funcs,
317 imx_drm_encoder->encoder->encoder_type);
318
319 drm_mode_group_reinit(imxdrm->drm);
320
321 return 0;
322}
323
324/*
325 * unregister an encoder from the drm core
326 */
327static void imx_drm_encoder_unregister(struct imx_drm_encoder
328 *imx_drm_encoder)
329{
330 struct imx_drm_device *imxdrm = __imx_drm_device();
331
332 drm_encoder_cleanup(imx_drm_encoder->encoder);
333
334 drm_mode_group_reinit(imxdrm->drm);
335}
336
337/*
338 * register a connector to the drm core
339 */
340static int imx_drm_connector_register(
341 struct imx_drm_connector *imx_drm_connector)
342{
343 struct imx_drm_device *imxdrm = __imx_drm_device();
344
345 drm_connector_init(imxdrm->drm, imx_drm_connector->connector,
346 imx_drm_connector->connector->funcs,
347 imx_drm_connector->connector->connector_type);
348 drm_mode_group_reinit(imxdrm->drm);
349
350 return drm_sysfs_connector_add(imx_drm_connector->connector);
351}
352
353/*
354 * unregister a connector from the drm core
355 */
356static void imx_drm_connector_unregister(
357 struct imx_drm_connector *imx_drm_connector)
358{
359 struct imx_drm_device *imxdrm = __imx_drm_device();
360
361 drm_sysfs_connector_remove(imx_drm_connector->connector);
362 drm_connector_cleanup(imx_drm_connector->connector);
363
364 drm_mode_group_reinit(imxdrm->drm);
365}
366
367/*
368 * register a crtc to the drm core
369 */
370static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc)
371{
372 struct imx_drm_device *imxdrm = __imx_drm_device();
373 int ret;
374
375 drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc,
376 imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
377 ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
378 if (ret)
379 return ret;
380
381 drm_crtc_helper_add(imx_drm_crtc->crtc,
382 imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
383
384 drm_mode_group_reinit(imxdrm->drm);
385
386 return 0;
387}
388
389/*
390 * Called by the CRTC driver when all CRTCs are registered. This
391 * puts all the pieces together and initializes the driver.
392 * Once this is called no more CRTCs can be registered since
393 * the drm core has hardcoded the number of crtcs in several
394 * places.
395 */
396static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
397{
398 struct imx_drm_device *imxdrm = __imx_drm_device();
399 int ret;
400
401 imxdrm->drm = drm;
402
403 drm->dev_private = imxdrm;
404
405 /*
406 * enable drm irq mode.
407 * - with irq_enabled = 1, we can use the vblank feature.
408 *
409 * P.S. note that we wouldn't use drm irq handler but
410 * just specific driver own one instead because
411 * drm framework supports only one irq handler and
412 * drivers can well take care of their interrupts
413 */
414 drm->irq_enabled = 1;
415
416 drm_mode_config_init(drm);
417 imx_drm_mode_config_init(drm);
418
419 mutex_lock(&imxdrm->mutex);
420
421 drm_kms_helper_poll_init(imxdrm->drm);
422
423 /* setup the grouping for the legacy output */
424 ret = drm_mode_group_init_legacy_group(imxdrm->drm,
425 &imxdrm->drm->primary->mode_group);
426 if (ret)
427 goto err_init;
428
429 ret = drm_vblank_init(imxdrm->drm, MAX_CRTC);
430 if (ret)
431 goto err_init;
432
433 /*
434 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
435 * by drm timer once a current process gives up ownership of
436 * vblank event.(after drm_vblank_put function is called)
437 */
438 imxdrm->drm->vblank_disable_allowed = 1;
439
440 ret = 0;
441
442err_init:
443 mutex_unlock(&imxdrm->mutex);
444
445 return ret;
446}
447
448static void imx_drm_update_possible_crtcs(void)
449{
450 struct imx_drm_device *imxdrm = __imx_drm_device();
451 struct imx_drm_crtc *imx_drm_crtc;
452 struct imx_drm_encoder *enc;
453 struct crtc_cookie *cookie;
454
455 list_for_each_entry(enc, &imxdrm->encoder_list, list) {
456 u32 possible_crtcs = 0;
457
458 list_for_each_entry(cookie, &enc->possible_crtcs, list) {
459 list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) {
460 if (imx_drm_crtc->cookie.cookie == cookie->cookie &&
461 imx_drm_crtc->cookie.id == cookie->id) {
462 possible_crtcs |= 1 << imx_drm_crtc->pipe;
463 }
464 }
465 }
466 enc->encoder->possible_crtcs = possible_crtcs;
467 enc->encoder->possible_clones = possible_crtcs;
468 }
469}
470
471/*
472 * imx_drm_add_crtc - add a new crtc
473 *
474 * The return value if !NULL is a cookie for the caller to pass to
475 * imx_drm_remove_crtc later.
476 */
477int imx_drm_add_crtc(struct drm_crtc *crtc,
478 struct imx_drm_crtc **new_crtc,
479 const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
480 struct module *owner, void *cookie, int id)
481{
482 struct imx_drm_device *imxdrm = __imx_drm_device();
483 struct imx_drm_crtc *imx_drm_crtc;
484 const struct drm_crtc_funcs *crtc_funcs;
485 int ret;
486
487 mutex_lock(&imxdrm->mutex);
488
489 if (imxdrm->references) {
490 ret = -EBUSY;
491 goto err_busy;
492 }
493
494 imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
495 if (!imx_drm_crtc) {
496 ret = -ENOMEM;
497 goto err_alloc;
498 }
499
500 imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
501 imx_drm_crtc->pipe = imxdrm->pipes++;
502 imx_drm_crtc->cookie.cookie = cookie;
503 imx_drm_crtc->cookie.id = id;
504
505 crtc_funcs = imx_drm_helper_funcs->crtc_funcs;
506
507 imx_drm_crtc->crtc = crtc;
508 imx_drm_crtc->imxdrm = imxdrm;
509
510 imx_drm_crtc->owner = owner;
511
512 list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list);
513
514 *new_crtc = imx_drm_crtc;
515
516 ret = imx_drm_crtc_register(imx_drm_crtc);
517 if (ret)
518 goto err_register;
519
520 imx_drm_update_possible_crtcs();
521
522 mutex_unlock(&imxdrm->mutex);
523
524 return 0;
525
526err_register:
527 kfree(imx_drm_crtc);
528err_alloc:
529err_busy:
530 mutex_unlock(&imxdrm->mutex);
531 return ret;
532}
533EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
534
535/*
536 * imx_drm_remove_crtc - remove a crtc
537 */
538int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
539{
540 struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm;
541
542 mutex_lock(&imxdrm->mutex);
543
544 drm_crtc_cleanup(imx_drm_crtc->crtc);
545
546 list_del(&imx_drm_crtc->list);
547
548 drm_mode_group_reinit(imxdrm->drm);
549
550 mutex_unlock(&imxdrm->mutex);
551
552 kfree(imx_drm_crtc);
553
554 return 0;
555}
556EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
557
558/*
559 * imx_drm_add_encoder - add a new encoder
560 */
561int imx_drm_add_encoder(struct drm_encoder *encoder,
562 struct imx_drm_encoder **newenc, struct module *owner)
563{
564 struct imx_drm_device *imxdrm = __imx_drm_device();
565 struct imx_drm_encoder *imx_drm_encoder;
566 int ret;
567
568 mutex_lock(&imxdrm->mutex);
569
570 if (imxdrm->references) {
571 ret = -EBUSY;
572 goto err_busy;
573 }
574
575 imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL);
576 if (!imx_drm_encoder) {
577 ret = -ENOMEM;
578 goto err_alloc;
579 }
580
581 imx_drm_encoder->encoder = encoder;
582 imx_drm_encoder->owner = owner;
583
584 ret = imx_drm_encoder_register(imx_drm_encoder);
585 if (ret) {
586 kfree(imx_drm_encoder);
587 ret = -ENOMEM;
588 goto err_register;
589 }
590
591 list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list);
592
593 *newenc = imx_drm_encoder;
594
595 mutex_unlock(&imxdrm->mutex);
596
597 return 0;
598
599err_register:
600 kfree(imx_drm_encoder);
601err_alloc:
602err_busy:
603 mutex_unlock(&imxdrm->mutex);
604
605 return ret;
606}
607EXPORT_SYMBOL_GPL(imx_drm_add_encoder);
608
609int imx_drm_encoder_add_possible_crtcs(
610 struct imx_drm_encoder *imx_drm_encoder,
611 struct device_node *np)
612{
613 struct imx_drm_device *imxdrm = __imx_drm_device();
614 struct of_phandle_args args;
615 struct crtc_cookie *c;
616 int ret = 0;
617 int i;
618
619 if (!list_empty(&imx_drm_encoder->possible_crtcs))
620 return -EBUSY;
621
622 for (i = 0; !ret; i++) {
623 ret = of_parse_phandle_with_args(np, "crtcs",
624 "#crtc-cells", i, &args);
625 if (ret < 0)
626 break;
627
628 c = kzalloc(sizeof(*c), GFP_KERNEL);
629 if (!c) {
630 of_node_put(args.np);
631 return -ENOMEM;
632 }
633
634 c->cookie = args.np;
635 c->id = args.args_count > 0 ? args.args[0] : 0;
636
637 of_node_put(args.np);
638
639 mutex_lock(&imxdrm->mutex);
640
641 list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs);
642
643 mutex_unlock(&imxdrm->mutex);
644 }
645
646 imx_drm_update_possible_crtcs();
647
648 return 0;
649}
650
651int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder,
652 struct drm_crtc *crtc)
653{
654 struct imx_drm_device *imxdrm = __imx_drm_device();
655 struct imx_drm_crtc *imx_crtc;
656 int i = 0;
657
658 mutex_lock(&imxdrm->mutex);
659
660 list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) {
661 if (imx_crtc->crtc == crtc)
662 goto found;
663 i++;
664 }
665
666 mutex_unlock(&imxdrm->mutex);
667
668 return -EINVAL;
669found:
670 mutex_unlock(&imxdrm->mutex);
671
672 return i;
673}
674
675/*
676 * imx_drm_remove_encoder - remove an encoder
677 */
678int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder)
679{
680 struct imx_drm_device *imxdrm = __imx_drm_device();
681 struct crtc_cookie *c, *tmp;
682
683 mutex_lock(&imxdrm->mutex);
684
685 imx_drm_encoder_unregister(imx_drm_encoder);
686
687 list_del(&imx_drm_encoder->list);
688
689 list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs,
690 list)
691 kfree(c);
692
693 mutex_unlock(&imxdrm->mutex);
694
695 kfree(imx_drm_encoder);
696
697 return 0;
698}
699EXPORT_SYMBOL_GPL(imx_drm_remove_encoder);
700
701/*
702 * imx_drm_add_connector - add a connector
703 */
704int imx_drm_add_connector(struct drm_connector *connector,
705 struct imx_drm_connector **new_con,
706 struct module *owner)
707{
708 struct imx_drm_device *imxdrm = __imx_drm_device();
709 struct imx_drm_connector *imx_drm_connector;
710 int ret;
711
712 mutex_lock(&imxdrm->mutex);
713
714 if (imxdrm->references) {
715 ret = -EBUSY;
716 goto err_busy;
717 }
718
719 imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL);
720 if (!imx_drm_connector) {
721 ret = -ENOMEM;
722 goto err_alloc;
723 }
724
725 imx_drm_connector->connector = connector;
726 imx_drm_connector->owner = owner;
727
728 ret = imx_drm_connector_register(imx_drm_connector);
729 if (ret)
730 goto err_register;
731
732 list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list);
733
734 *new_con = imx_drm_connector;
735
736 mutex_unlock(&imxdrm->mutex);
737
738 return 0;
739
740err_register:
741 kfree(imx_drm_connector);
742err_alloc:
743err_busy:
744 mutex_unlock(&imxdrm->mutex);
745
746 return ret;
747}
748EXPORT_SYMBOL_GPL(imx_drm_add_connector);
749
750void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper)
751{
752 struct imx_drm_device *imxdrm = __imx_drm_device();
753
754 imxdrm->fbhelper = fbdev_helper;
755}
756EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set);
757
758/*
759 * imx_drm_remove_connector - remove a connector
760 */
761int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector)
762{
763 struct imx_drm_device *imxdrm = __imx_drm_device();
764
765 mutex_lock(&imxdrm->mutex);
766
767 imx_drm_connector_unregister(imx_drm_connector);
768
769 list_del(&imx_drm_connector->list);
770
771 mutex_unlock(&imxdrm->mutex);
772
773 kfree(imx_drm_connector);
774
775 return 0;
776}
777EXPORT_SYMBOL_GPL(imx_drm_remove_connector);
778
779static struct drm_ioctl_desc imx_drm_ioctls[] = {
780 /* none so far */
781};
782
783static struct drm_driver imx_drm_driver = {
784 .driver_features = DRIVER_MODESET | DRIVER_GEM,
785 .load = imx_drm_driver_load,
786 .unload = imx_drm_driver_unload,
787 .firstopen = imx_drm_driver_firstopen,
788 .lastclose = imx_drm_driver_lastclose,
789 .gem_free_object = drm_gem_cma_free_object,
790 .gem_vm_ops = &drm_gem_cma_vm_ops,
791 .dumb_create = drm_gem_cma_dumb_create,
792 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
793 .dumb_destroy = drm_gem_cma_dumb_destroy,
794
795 .get_vblank_counter = drm_vblank_count,
796 .enable_vblank = imx_drm_enable_vblank,
797 .disable_vblank = imx_drm_disable_vblank,
798 .ioctls = imx_drm_ioctls,
799 .num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
800 .fops = &imx_drm_driver_fops,
801 .name = "imx-drm",
802 .desc = "i.MX DRM graphics",
803 .date = "20120507",
804 .major = 1,
805 .minor = 0,
806 .patchlevel = 0,
807};
808
809static int imx_drm_platform_probe(struct platform_device *pdev)
810{
811 imx_drm_device->dev = &pdev->dev;
812
813 return drm_platform_init(&imx_drm_driver, pdev);
814}
815
816static int imx_drm_platform_remove(struct platform_device *pdev)
817{
818 drm_platform_exit(&imx_drm_driver, pdev);
819
820 return 0;
821}
822
823static struct platform_driver imx_drm_pdrv = {
824 .probe = imx_drm_platform_probe,
825 .remove = __devexit_p(imx_drm_platform_remove),
826 .driver = {
827 .owner = THIS_MODULE,
828 .name = "imx-drm",
829 },
830};
831
832static struct platform_device *imx_drm_pdev;
833
834static int __init imx_drm_init(void)
835{
836 int ret;
837
838 imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL);
839 if (!imx_drm_device)
840 return -ENOMEM;
841
842 mutex_init(&imx_drm_device->mutex);
843 INIT_LIST_HEAD(&imx_drm_device->crtc_list);
844 INIT_LIST_HEAD(&imx_drm_device->connector_list);
845 INIT_LIST_HEAD(&imx_drm_device->encoder_list);
846
847 imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0);
848 if (!imx_drm_pdev) {
849 ret = -EINVAL;
850 goto err_pdev;
851 }
852
853 imx_drm_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32),
854
855 ret = platform_driver_register(&imx_drm_pdrv);
856 if (ret)
857 goto err_pdrv;
858
859 return 0;
860
861err_pdrv:
862 platform_device_unregister(imx_drm_pdev);
863err_pdev:
864 kfree(imx_drm_device);
865
866 return ret;
867}
868
869static void __exit imx_drm_exit(void)
870{
871 platform_device_unregister(imx_drm_pdev);
872 platform_driver_unregister(&imx_drm_pdrv);
873
874 kfree(imx_drm_device);
875}
876
877module_init(imx_drm_init);
878module_exit(imx_drm_exit);
879
880MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
881MODULE_DESCRIPTION("i.MX drm driver core");
882MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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