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Commit | Line | Data |
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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 | ||
31 | struct crtc_cookie { | |
32 | void *cookie; | |
33 | int id; | |
34 | struct list_head list; | |
35 | }; | |
36 | ||
37 | struct 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 | ||
49 | struct 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 | ||
59 | struct 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 | ||
66 | struct imx_drm_connector { | |
67 | struct drm_connector *connector; | |
68 | struct list_head list; | |
69 | struct module *owner; | |
70 | }; | |
71 | ||
72 | static 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 | ||
80 | static 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 | ||
90 | static 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 | */ | |
104 | static 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 | ||
115 | int 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; | |
131 | found: | |
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 | } | |
aecfbdb1 | 140 | EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format); |
e692da4d SH |
141 | |
142 | int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc) | |
143 | { | |
144 | return drm_vblank_get(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe); | |
145 | } | |
146 | EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get); | |
147 | ||
148 | void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc) | |
149 | { | |
150 | drm_vblank_put(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe); | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put); | |
153 | ||
154 | void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc) | |
155 | { | |
156 | drm_handle_vblank(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe); | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(imx_drm_handle_vblank); | |
159 | ||
160 | static int imx_drm_enable_vblank(struct drm_device *drm, int crtc) | |
161 | { | |
162 | struct imx_drm_device *imxdrm = drm->dev_private; | |
163 | struct imx_drm_crtc *imx_drm_crtc; | |
164 | int ret; | |
165 | ||
166 | imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc); | |
167 | if (!imx_drm_crtc) | |
168 | return -EINVAL; | |
169 | ||
170 | if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank) | |
171 | return -ENOSYS; | |
172 | ||
173 | ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank( | |
174 | imx_drm_crtc->crtc); | |
175 | ||
176 | return ret; | |
177 | } | |
178 | ||
179 | static void imx_drm_disable_vblank(struct drm_device *drm, int crtc) | |
180 | { | |
181 | struct imx_drm_device *imxdrm = drm->dev_private; | |
182 | struct imx_drm_crtc *imx_drm_crtc; | |
183 | ||
184 | imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc); | |
185 | if (!imx_drm_crtc) | |
186 | return; | |
187 | ||
188 | if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank) | |
189 | return; | |
190 | ||
191 | imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc); | |
192 | } | |
193 | ||
194 | static const struct file_operations imx_drm_driver_fops = { | |
195 | .owner = THIS_MODULE, | |
196 | .open = drm_open, | |
197 | .release = drm_release, | |
198 | .unlocked_ioctl = drm_ioctl, | |
199 | .mmap = drm_gem_cma_mmap, | |
200 | .poll = drm_poll, | |
201 | .fasync = drm_fasync, | |
202 | .read = drm_read, | |
203 | .llseek = noop_llseek, | |
204 | }; | |
205 | ||
206 | static struct imx_drm_device *imx_drm_device; | |
207 | ||
208 | static struct imx_drm_device *__imx_drm_device(void) | |
209 | { | |
210 | return imx_drm_device; | |
211 | } | |
212 | ||
213 | struct drm_device *imx_drm_device_get(void) | |
214 | { | |
215 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
216 | struct imx_drm_encoder *enc; | |
217 | struct imx_drm_connector *con; | |
218 | struct imx_drm_crtc *crtc; | |
219 | ||
220 | mutex_lock(&imxdrm->mutex); | |
221 | ||
222 | list_for_each_entry(enc, &imxdrm->encoder_list, list) { | |
223 | if (!try_module_get(enc->owner)) { | |
224 | dev_err(imxdrm->dev, "could not get module %s\n", | |
225 | module_name(enc->owner)); | |
226 | goto unwind_enc; | |
227 | } | |
228 | } | |
229 | ||
230 | list_for_each_entry(con, &imxdrm->connector_list, list) { | |
231 | if (!try_module_get(con->owner)) { | |
232 | dev_err(imxdrm->dev, "could not get module %s\n", | |
233 | module_name(con->owner)); | |
234 | goto unwind_con; | |
235 | } | |
236 | } | |
237 | ||
238 | list_for_each_entry(crtc, &imxdrm->crtc_list, list) { | |
239 | if (!try_module_get(crtc->owner)) { | |
240 | dev_err(imxdrm->dev, "could not get module %s\n", | |
241 | module_name(crtc->owner)); | |
242 | goto unwind_crtc; | |
243 | } | |
244 | } | |
245 | ||
246 | imxdrm->references++; | |
247 | ||
248 | mutex_unlock(&imxdrm->mutex); | |
249 | ||
250 | return imxdrm->drm; | |
251 | ||
252 | unwind_crtc: | |
253 | list_for_each_entry_continue_reverse(crtc, &imxdrm->crtc_list, list) | |
254 | module_put(crtc->owner); | |
255 | unwind_con: | |
256 | list_for_each_entry_continue_reverse(con, &imxdrm->connector_list, list) | |
257 | module_put(con->owner); | |
258 | unwind_enc: | |
259 | list_for_each_entry_continue_reverse(enc, &imxdrm->encoder_list, list) | |
260 | module_put(enc->owner); | |
261 | ||
262 | mutex_unlock(&imxdrm->mutex); | |
263 | ||
264 | return NULL; | |
265 | ||
266 | } | |
267 | EXPORT_SYMBOL_GPL(imx_drm_device_get); | |
268 | ||
269 | void imx_drm_device_put(void) | |
270 | { | |
271 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
272 | struct imx_drm_encoder *enc; | |
273 | struct imx_drm_connector *con; | |
274 | struct imx_drm_crtc *crtc; | |
275 | ||
276 | mutex_lock(&imxdrm->mutex); | |
277 | ||
278 | list_for_each_entry(crtc, &imxdrm->crtc_list, list) | |
279 | module_put(crtc->owner); | |
280 | ||
281 | list_for_each_entry(con, &imxdrm->connector_list, list) | |
282 | module_put(con->owner); | |
283 | ||
284 | list_for_each_entry(enc, &imxdrm->encoder_list, list) | |
285 | module_put(enc->owner); | |
286 | ||
287 | imxdrm->references--; | |
288 | ||
289 | mutex_unlock(&imxdrm->mutex); | |
290 | } | |
291 | EXPORT_SYMBOL_GPL(imx_drm_device_put); | |
292 | ||
293 | static int drm_mode_group_reinit(struct drm_device *dev) | |
294 | { | |
295 | struct drm_mode_group *group = &dev->primary->mode_group; | |
296 | uint32_t *id_list = group->id_list; | |
297 | int ret; | |
298 | ||
299 | ret = drm_mode_group_init_legacy_group(dev, group); | |
300 | if (ret < 0) | |
301 | return ret; | |
302 | ||
303 | kfree(id_list); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | /* | |
308 | * register an encoder to the drm core | |
309 | */ | |
310 | static int imx_drm_encoder_register(struct imx_drm_encoder *imx_drm_encoder) | |
311 | { | |
312 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
313 | ||
314 | INIT_LIST_HEAD(&imx_drm_encoder->possible_crtcs); | |
315 | ||
316 | drm_encoder_init(imxdrm->drm, imx_drm_encoder->encoder, | |
317 | imx_drm_encoder->encoder->funcs, | |
318 | imx_drm_encoder->encoder->encoder_type); | |
319 | ||
320 | drm_mode_group_reinit(imxdrm->drm); | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | /* | |
326 | * unregister an encoder from the drm core | |
327 | */ | |
328 | static void imx_drm_encoder_unregister(struct imx_drm_encoder | |
329 | *imx_drm_encoder) | |
330 | { | |
331 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
332 | ||
333 | drm_encoder_cleanup(imx_drm_encoder->encoder); | |
334 | ||
335 | drm_mode_group_reinit(imxdrm->drm); | |
336 | } | |
337 | ||
338 | /* | |
339 | * register a connector to the drm core | |
340 | */ | |
341 | static int imx_drm_connector_register( | |
342 | struct imx_drm_connector *imx_drm_connector) | |
343 | { | |
344 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
345 | ||
346 | drm_connector_init(imxdrm->drm, imx_drm_connector->connector, | |
347 | imx_drm_connector->connector->funcs, | |
348 | imx_drm_connector->connector->connector_type); | |
349 | drm_mode_group_reinit(imxdrm->drm); | |
350 | ||
351 | return drm_sysfs_connector_add(imx_drm_connector->connector); | |
352 | } | |
353 | ||
354 | /* | |
355 | * unregister a connector from the drm core | |
356 | */ | |
357 | static void imx_drm_connector_unregister( | |
358 | struct imx_drm_connector *imx_drm_connector) | |
359 | { | |
360 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
361 | ||
362 | drm_sysfs_connector_remove(imx_drm_connector->connector); | |
363 | drm_connector_cleanup(imx_drm_connector->connector); | |
364 | ||
365 | drm_mode_group_reinit(imxdrm->drm); | |
366 | } | |
367 | ||
368 | /* | |
369 | * register a crtc to the drm core | |
370 | */ | |
371 | static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc) | |
372 | { | |
373 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
374 | int ret; | |
375 | ||
376 | drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc, | |
377 | imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs); | |
378 | ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256); | |
379 | if (ret) | |
380 | return ret; | |
381 | ||
382 | drm_crtc_helper_add(imx_drm_crtc->crtc, | |
383 | imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs); | |
384 | ||
385 | drm_mode_group_reinit(imxdrm->drm); | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | /* | |
391 | * Called by the CRTC driver when all CRTCs are registered. This | |
392 | * puts all the pieces together and initializes the driver. | |
393 | * Once this is called no more CRTCs can be registered since | |
394 | * the drm core has hardcoded the number of crtcs in several | |
395 | * places. | |
396 | */ | |
397 | static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags) | |
398 | { | |
399 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
400 | int ret; | |
401 | ||
402 | imxdrm->drm = drm; | |
403 | ||
404 | drm->dev_private = imxdrm; | |
405 | ||
406 | /* | |
407 | * enable drm irq mode. | |
408 | * - with irq_enabled = 1, we can use the vblank feature. | |
409 | * | |
410 | * P.S. note that we wouldn't use drm irq handler but | |
411 | * just specific driver own one instead because | |
412 | * drm framework supports only one irq handler and | |
413 | * drivers can well take care of their interrupts | |
414 | */ | |
415 | drm->irq_enabled = 1; | |
416 | ||
417 | drm_mode_config_init(drm); | |
418 | imx_drm_mode_config_init(drm); | |
419 | ||
420 | mutex_lock(&imxdrm->mutex); | |
421 | ||
422 | drm_kms_helper_poll_init(imxdrm->drm); | |
423 | ||
424 | /* setup the grouping for the legacy output */ | |
425 | ret = drm_mode_group_init_legacy_group(imxdrm->drm, | |
426 | &imxdrm->drm->primary->mode_group); | |
427 | if (ret) | |
428 | goto err_init; | |
429 | ||
430 | ret = drm_vblank_init(imxdrm->drm, MAX_CRTC); | |
431 | if (ret) | |
432 | goto err_init; | |
433 | ||
434 | /* | |
435 | * with vblank_disable_allowed = 1, vblank interrupt will be disabled | |
436 | * by drm timer once a current process gives up ownership of | |
437 | * vblank event.(after drm_vblank_put function is called) | |
438 | */ | |
439 | imxdrm->drm->vblank_disable_allowed = 1; | |
440 | ||
441 | ret = 0; | |
442 | ||
443 | err_init: | |
444 | mutex_unlock(&imxdrm->mutex); | |
445 | ||
446 | return ret; | |
447 | } | |
448 | ||
449 | static void imx_drm_update_possible_crtcs(void) | |
450 | { | |
451 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
452 | struct imx_drm_crtc *imx_drm_crtc; | |
453 | struct imx_drm_encoder *enc; | |
454 | struct crtc_cookie *cookie; | |
455 | ||
456 | list_for_each_entry(enc, &imxdrm->encoder_list, list) { | |
457 | u32 possible_crtcs = 0; | |
458 | ||
459 | list_for_each_entry(cookie, &enc->possible_crtcs, list) { | |
460 | list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) { | |
461 | if (imx_drm_crtc->cookie.cookie == cookie->cookie && | |
462 | imx_drm_crtc->cookie.id == cookie->id) { | |
463 | possible_crtcs |= 1 << imx_drm_crtc->pipe; | |
464 | } | |
465 | } | |
466 | } | |
467 | enc->encoder->possible_crtcs = possible_crtcs; | |
468 | enc->encoder->possible_clones = possible_crtcs; | |
469 | } | |
470 | } | |
471 | ||
472 | /* | |
473 | * imx_drm_add_crtc - add a new crtc | |
474 | * | |
475 | * The return value if !NULL is a cookie for the caller to pass to | |
476 | * imx_drm_remove_crtc later. | |
477 | */ | |
478 | int imx_drm_add_crtc(struct drm_crtc *crtc, | |
479 | struct imx_drm_crtc **new_crtc, | |
480 | const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs, | |
481 | struct module *owner, void *cookie, int id) | |
482 | { | |
483 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
484 | struct imx_drm_crtc *imx_drm_crtc; | |
485 | const struct drm_crtc_funcs *crtc_funcs; | |
486 | int ret; | |
487 | ||
488 | mutex_lock(&imxdrm->mutex); | |
489 | ||
490 | if (imxdrm->references) { | |
491 | ret = -EBUSY; | |
492 | goto err_busy; | |
493 | } | |
494 | ||
495 | imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL); | |
496 | if (!imx_drm_crtc) { | |
497 | ret = -ENOMEM; | |
498 | goto err_alloc; | |
499 | } | |
500 | ||
501 | imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs; | |
502 | imx_drm_crtc->pipe = imxdrm->pipes++; | |
503 | imx_drm_crtc->cookie.cookie = cookie; | |
504 | imx_drm_crtc->cookie.id = id; | |
505 | ||
506 | crtc_funcs = imx_drm_helper_funcs->crtc_funcs; | |
507 | ||
508 | imx_drm_crtc->crtc = crtc; | |
509 | imx_drm_crtc->imxdrm = imxdrm; | |
510 | ||
511 | imx_drm_crtc->owner = owner; | |
512 | ||
513 | list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list); | |
514 | ||
515 | *new_crtc = imx_drm_crtc; | |
516 | ||
517 | ret = imx_drm_crtc_register(imx_drm_crtc); | |
518 | if (ret) | |
519 | goto err_register; | |
520 | ||
521 | imx_drm_update_possible_crtcs(); | |
522 | ||
523 | mutex_unlock(&imxdrm->mutex); | |
524 | ||
525 | return 0; | |
526 | ||
527 | err_register: | |
528 | kfree(imx_drm_crtc); | |
529 | err_alloc: | |
530 | err_busy: | |
531 | mutex_unlock(&imxdrm->mutex); | |
532 | return ret; | |
533 | } | |
534 | EXPORT_SYMBOL_GPL(imx_drm_add_crtc); | |
535 | ||
536 | /* | |
537 | * imx_drm_remove_crtc - remove a crtc | |
538 | */ | |
539 | int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc) | |
540 | { | |
541 | struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm; | |
542 | ||
543 | mutex_lock(&imxdrm->mutex); | |
544 | ||
545 | drm_crtc_cleanup(imx_drm_crtc->crtc); | |
546 | ||
547 | list_del(&imx_drm_crtc->list); | |
548 | ||
549 | drm_mode_group_reinit(imxdrm->drm); | |
550 | ||
551 | mutex_unlock(&imxdrm->mutex); | |
552 | ||
553 | kfree(imx_drm_crtc); | |
554 | ||
555 | return 0; | |
556 | } | |
557 | EXPORT_SYMBOL_GPL(imx_drm_remove_crtc); | |
558 | ||
559 | /* | |
560 | * imx_drm_add_encoder - add a new encoder | |
561 | */ | |
562 | int imx_drm_add_encoder(struct drm_encoder *encoder, | |
563 | struct imx_drm_encoder **newenc, struct module *owner) | |
564 | { | |
565 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
566 | struct imx_drm_encoder *imx_drm_encoder; | |
567 | int ret; | |
568 | ||
569 | mutex_lock(&imxdrm->mutex); | |
570 | ||
571 | if (imxdrm->references) { | |
572 | ret = -EBUSY; | |
573 | goto err_busy; | |
574 | } | |
575 | ||
576 | imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL); | |
577 | if (!imx_drm_encoder) { | |
578 | ret = -ENOMEM; | |
579 | goto err_alloc; | |
580 | } | |
581 | ||
582 | imx_drm_encoder->encoder = encoder; | |
583 | imx_drm_encoder->owner = owner; | |
584 | ||
585 | ret = imx_drm_encoder_register(imx_drm_encoder); | |
586 | if (ret) { | |
587 | kfree(imx_drm_encoder); | |
588 | ret = -ENOMEM; | |
589 | goto err_register; | |
590 | } | |
591 | ||
592 | list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list); | |
593 | ||
594 | *newenc = imx_drm_encoder; | |
595 | ||
596 | mutex_unlock(&imxdrm->mutex); | |
597 | ||
598 | return 0; | |
599 | ||
600 | err_register: | |
601 | kfree(imx_drm_encoder); | |
602 | err_alloc: | |
603 | err_busy: | |
604 | mutex_unlock(&imxdrm->mutex); | |
605 | ||
606 | return ret; | |
607 | } | |
608 | EXPORT_SYMBOL_GPL(imx_drm_add_encoder); | |
609 | ||
610 | int imx_drm_encoder_add_possible_crtcs( | |
611 | struct imx_drm_encoder *imx_drm_encoder, | |
612 | struct device_node *np) | |
613 | { | |
614 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
615 | struct of_phandle_args args; | |
616 | struct crtc_cookie *c; | |
617 | int ret = 0; | |
618 | int i; | |
619 | ||
620 | if (!list_empty(&imx_drm_encoder->possible_crtcs)) | |
621 | return -EBUSY; | |
622 | ||
623 | for (i = 0; !ret; i++) { | |
624 | ret = of_parse_phandle_with_args(np, "crtcs", | |
625 | "#crtc-cells", i, &args); | |
626 | if (ret < 0) | |
627 | break; | |
628 | ||
629 | c = kzalloc(sizeof(*c), GFP_KERNEL); | |
630 | if (!c) { | |
631 | of_node_put(args.np); | |
632 | return -ENOMEM; | |
633 | } | |
634 | ||
635 | c->cookie = args.np; | |
636 | c->id = args.args_count > 0 ? args.args[0] : 0; | |
637 | ||
638 | of_node_put(args.np); | |
639 | ||
640 | mutex_lock(&imxdrm->mutex); | |
641 | ||
642 | list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs); | |
643 | ||
644 | mutex_unlock(&imxdrm->mutex); | |
645 | } | |
646 | ||
647 | imx_drm_update_possible_crtcs(); | |
648 | ||
649 | return 0; | |
650 | } | |
aecfbdb1 | 651 | EXPORT_SYMBOL_GPL(imx_drm_encoder_add_possible_crtcs); |
e692da4d SH |
652 | |
653 | int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder, | |
654 | struct drm_crtc *crtc) | |
655 | { | |
656 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
657 | struct imx_drm_crtc *imx_crtc; | |
658 | int i = 0; | |
659 | ||
660 | mutex_lock(&imxdrm->mutex); | |
661 | ||
662 | list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) { | |
663 | if (imx_crtc->crtc == crtc) | |
664 | goto found; | |
665 | i++; | |
666 | } | |
667 | ||
668 | mutex_unlock(&imxdrm->mutex); | |
669 | ||
670 | return -EINVAL; | |
671 | found: | |
672 | mutex_unlock(&imxdrm->mutex); | |
673 | ||
674 | return i; | |
675 | } | |
676 | ||
677 | /* | |
678 | * imx_drm_remove_encoder - remove an encoder | |
679 | */ | |
680 | int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder) | |
681 | { | |
682 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
683 | struct crtc_cookie *c, *tmp; | |
684 | ||
685 | mutex_lock(&imxdrm->mutex); | |
686 | ||
687 | imx_drm_encoder_unregister(imx_drm_encoder); | |
688 | ||
689 | list_del(&imx_drm_encoder->list); | |
690 | ||
691 | list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs, | |
692 | list) | |
693 | kfree(c); | |
694 | ||
695 | mutex_unlock(&imxdrm->mutex); | |
696 | ||
697 | kfree(imx_drm_encoder); | |
698 | ||
699 | return 0; | |
700 | } | |
701 | EXPORT_SYMBOL_GPL(imx_drm_remove_encoder); | |
702 | ||
703 | /* | |
704 | * imx_drm_add_connector - add a connector | |
705 | */ | |
706 | int imx_drm_add_connector(struct drm_connector *connector, | |
707 | struct imx_drm_connector **new_con, | |
708 | struct module *owner) | |
709 | { | |
710 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
711 | struct imx_drm_connector *imx_drm_connector; | |
712 | int ret; | |
713 | ||
714 | mutex_lock(&imxdrm->mutex); | |
715 | ||
716 | if (imxdrm->references) { | |
717 | ret = -EBUSY; | |
718 | goto err_busy; | |
719 | } | |
720 | ||
721 | imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL); | |
722 | if (!imx_drm_connector) { | |
723 | ret = -ENOMEM; | |
724 | goto err_alloc; | |
725 | } | |
726 | ||
727 | imx_drm_connector->connector = connector; | |
728 | imx_drm_connector->owner = owner; | |
729 | ||
730 | ret = imx_drm_connector_register(imx_drm_connector); | |
731 | if (ret) | |
732 | goto err_register; | |
733 | ||
734 | list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list); | |
735 | ||
736 | *new_con = imx_drm_connector; | |
737 | ||
738 | mutex_unlock(&imxdrm->mutex); | |
739 | ||
740 | return 0; | |
741 | ||
742 | err_register: | |
743 | kfree(imx_drm_connector); | |
744 | err_alloc: | |
745 | err_busy: | |
746 | mutex_unlock(&imxdrm->mutex); | |
747 | ||
748 | return ret; | |
749 | } | |
750 | EXPORT_SYMBOL_GPL(imx_drm_add_connector); | |
751 | ||
752 | void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper) | |
753 | { | |
754 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
755 | ||
756 | imxdrm->fbhelper = fbdev_helper; | |
757 | } | |
758 | EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set); | |
759 | ||
760 | /* | |
761 | * imx_drm_remove_connector - remove a connector | |
762 | */ | |
763 | int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector) | |
764 | { | |
765 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
766 | ||
767 | mutex_lock(&imxdrm->mutex); | |
768 | ||
769 | imx_drm_connector_unregister(imx_drm_connector); | |
770 | ||
771 | list_del(&imx_drm_connector->list); | |
772 | ||
773 | mutex_unlock(&imxdrm->mutex); | |
774 | ||
775 | kfree(imx_drm_connector); | |
776 | ||
777 | return 0; | |
778 | } | |
779 | EXPORT_SYMBOL_GPL(imx_drm_remove_connector); | |
780 | ||
781 | static struct drm_ioctl_desc imx_drm_ioctls[] = { | |
782 | /* none so far */ | |
783 | }; | |
784 | ||
785 | static struct drm_driver imx_drm_driver = { | |
786 | .driver_features = DRIVER_MODESET | DRIVER_GEM, | |
787 | .load = imx_drm_driver_load, | |
788 | .unload = imx_drm_driver_unload, | |
789 | .firstopen = imx_drm_driver_firstopen, | |
790 | .lastclose = imx_drm_driver_lastclose, | |
791 | .gem_free_object = drm_gem_cma_free_object, | |
792 | .gem_vm_ops = &drm_gem_cma_vm_ops, | |
793 | .dumb_create = drm_gem_cma_dumb_create, | |
794 | .dumb_map_offset = drm_gem_cma_dumb_map_offset, | |
795 | .dumb_destroy = drm_gem_cma_dumb_destroy, | |
796 | ||
797 | .get_vblank_counter = drm_vblank_count, | |
798 | .enable_vblank = imx_drm_enable_vblank, | |
799 | .disable_vblank = imx_drm_disable_vblank, | |
800 | .ioctls = imx_drm_ioctls, | |
801 | .num_ioctls = ARRAY_SIZE(imx_drm_ioctls), | |
802 | .fops = &imx_drm_driver_fops, | |
803 | .name = "imx-drm", | |
804 | .desc = "i.MX DRM graphics", | |
805 | .date = "20120507", | |
806 | .major = 1, | |
807 | .minor = 0, | |
808 | .patchlevel = 0, | |
809 | }; | |
810 | ||
811 | static int imx_drm_platform_probe(struct platform_device *pdev) | |
812 | { | |
813 | imx_drm_device->dev = &pdev->dev; | |
814 | ||
815 | return drm_platform_init(&imx_drm_driver, pdev); | |
816 | } | |
817 | ||
818 | static int imx_drm_platform_remove(struct platform_device *pdev) | |
819 | { | |
820 | drm_platform_exit(&imx_drm_driver, pdev); | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | static struct platform_driver imx_drm_pdrv = { | |
826 | .probe = imx_drm_platform_probe, | |
827 | .remove = __devexit_p(imx_drm_platform_remove), | |
828 | .driver = { | |
829 | .owner = THIS_MODULE, | |
830 | .name = "imx-drm", | |
831 | }, | |
832 | }; | |
833 | ||
834 | static struct platform_device *imx_drm_pdev; | |
835 | ||
836 | static int __init imx_drm_init(void) | |
837 | { | |
838 | int ret; | |
839 | ||
840 | imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL); | |
841 | if (!imx_drm_device) | |
842 | return -ENOMEM; | |
843 | ||
844 | mutex_init(&imx_drm_device->mutex); | |
845 | INIT_LIST_HEAD(&imx_drm_device->crtc_list); | |
846 | INIT_LIST_HEAD(&imx_drm_device->connector_list); | |
847 | INIT_LIST_HEAD(&imx_drm_device->encoder_list); | |
848 | ||
849 | imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0); | |
850 | if (!imx_drm_pdev) { | |
851 | ret = -EINVAL; | |
852 | goto err_pdev; | |
853 | } | |
854 | ||
855 | imx_drm_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32), | |
856 | ||
857 | ret = platform_driver_register(&imx_drm_pdrv); | |
858 | if (ret) | |
859 | goto err_pdrv; | |
860 | ||
861 | return 0; | |
862 | ||
863 | err_pdrv: | |
864 | platform_device_unregister(imx_drm_pdev); | |
865 | err_pdev: | |
866 | kfree(imx_drm_device); | |
867 | ||
868 | return ret; | |
869 | } | |
870 | ||
871 | static void __exit imx_drm_exit(void) | |
872 | { | |
873 | platform_device_unregister(imx_drm_pdev); | |
874 | platform_driver_unregister(&imx_drm_pdrv); | |
875 | ||
876 | kfree(imx_drm_device); | |
877 | } | |
878 | ||
879 | module_init(imx_drm_init); | |
880 | module_exit(imx_drm_exit); | |
881 | ||
882 | MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); | |
883 | MODULE_DESCRIPTION("i.MX drm driver core"); | |
884 | MODULE_LICENSE("GPL"); |