Commit | Line | Data |
---|---|---|
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 | ||
2ea42608 PZ |
115 | int imx_drm_crtc_panel_format_pins(struct drm_crtc *crtc, u32 encoder_type, |
116 | u32 interface_pix_fmt, int hsync_pin, int vsync_pin) | |
e692da4d SH |
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, | |
2ea42608 PZ |
137 | encoder_type, interface_pix_fmt, |
138 | hsync_pin, vsync_pin); | |
e692da4d SH |
139 | return 0; |
140 | } | |
2ea42608 PZ |
141 | EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format_pins); |
142 | ||
143 | int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type, | |
144 | u32 interface_pix_fmt) | |
145 | { | |
146 | return imx_drm_crtc_panel_format_pins(crtc, encoder_type, | |
079461bf | 147 | interface_pix_fmt, 2, 3); |
2ea42608 | 148 | } |
aecfbdb1 | 149 | EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format); |
e692da4d SH |
150 | |
151 | int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc) | |
152 | { | |
153 | return drm_vblank_get(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe); | |
154 | } | |
155 | EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get); | |
156 | ||
157 | void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc) | |
158 | { | |
159 | drm_vblank_put(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe); | |
160 | } | |
161 | EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put); | |
162 | ||
163 | void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc) | |
164 | { | |
165 | drm_handle_vblank(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe); | |
166 | } | |
167 | EXPORT_SYMBOL_GPL(imx_drm_handle_vblank); | |
168 | ||
169 | static int imx_drm_enable_vblank(struct drm_device *drm, int crtc) | |
170 | { | |
171 | struct imx_drm_device *imxdrm = drm->dev_private; | |
172 | struct imx_drm_crtc *imx_drm_crtc; | |
173 | int ret; | |
174 | ||
175 | imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc); | |
176 | if (!imx_drm_crtc) | |
177 | return -EINVAL; | |
178 | ||
179 | if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank) | |
180 | return -ENOSYS; | |
181 | ||
182 | ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank( | |
183 | imx_drm_crtc->crtc); | |
184 | ||
185 | return ret; | |
186 | } | |
187 | ||
188 | static void imx_drm_disable_vblank(struct drm_device *drm, int crtc) | |
189 | { | |
190 | struct imx_drm_device *imxdrm = drm->dev_private; | |
191 | struct imx_drm_crtc *imx_drm_crtc; | |
192 | ||
193 | imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc); | |
194 | if (!imx_drm_crtc) | |
195 | return; | |
196 | ||
197 | if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank) | |
198 | return; | |
199 | ||
200 | imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc); | |
201 | } | |
202 | ||
203 | static const struct file_operations imx_drm_driver_fops = { | |
204 | .owner = THIS_MODULE, | |
205 | .open = drm_open, | |
206 | .release = drm_release, | |
207 | .unlocked_ioctl = drm_ioctl, | |
208 | .mmap = drm_gem_cma_mmap, | |
209 | .poll = drm_poll, | |
210 | .fasync = drm_fasync, | |
211 | .read = drm_read, | |
212 | .llseek = noop_llseek, | |
213 | }; | |
214 | ||
215 | static struct imx_drm_device *imx_drm_device; | |
216 | ||
217 | static struct imx_drm_device *__imx_drm_device(void) | |
218 | { | |
219 | return imx_drm_device; | |
220 | } | |
221 | ||
222 | struct drm_device *imx_drm_device_get(void) | |
223 | { | |
224 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
225 | struct imx_drm_encoder *enc; | |
226 | struct imx_drm_connector *con; | |
227 | struct imx_drm_crtc *crtc; | |
228 | ||
229 | mutex_lock(&imxdrm->mutex); | |
230 | ||
231 | list_for_each_entry(enc, &imxdrm->encoder_list, list) { | |
232 | if (!try_module_get(enc->owner)) { | |
233 | dev_err(imxdrm->dev, "could not get module %s\n", | |
234 | module_name(enc->owner)); | |
235 | goto unwind_enc; | |
236 | } | |
237 | } | |
238 | ||
239 | list_for_each_entry(con, &imxdrm->connector_list, list) { | |
240 | if (!try_module_get(con->owner)) { | |
241 | dev_err(imxdrm->dev, "could not get module %s\n", | |
242 | module_name(con->owner)); | |
243 | goto unwind_con; | |
244 | } | |
245 | } | |
246 | ||
247 | list_for_each_entry(crtc, &imxdrm->crtc_list, list) { | |
248 | if (!try_module_get(crtc->owner)) { | |
249 | dev_err(imxdrm->dev, "could not get module %s\n", | |
250 | module_name(crtc->owner)); | |
251 | goto unwind_crtc; | |
252 | } | |
253 | } | |
254 | ||
255 | imxdrm->references++; | |
256 | ||
257 | mutex_unlock(&imxdrm->mutex); | |
258 | ||
259 | return imxdrm->drm; | |
260 | ||
261 | unwind_crtc: | |
262 | list_for_each_entry_continue_reverse(crtc, &imxdrm->crtc_list, list) | |
263 | module_put(crtc->owner); | |
264 | unwind_con: | |
265 | list_for_each_entry_continue_reverse(con, &imxdrm->connector_list, list) | |
266 | module_put(con->owner); | |
267 | unwind_enc: | |
268 | list_for_each_entry_continue_reverse(enc, &imxdrm->encoder_list, list) | |
269 | module_put(enc->owner); | |
270 | ||
271 | mutex_unlock(&imxdrm->mutex); | |
272 | ||
273 | return NULL; | |
274 | ||
275 | } | |
276 | EXPORT_SYMBOL_GPL(imx_drm_device_get); | |
277 | ||
278 | void imx_drm_device_put(void) | |
279 | { | |
280 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
281 | struct imx_drm_encoder *enc; | |
282 | struct imx_drm_connector *con; | |
283 | struct imx_drm_crtc *crtc; | |
284 | ||
285 | mutex_lock(&imxdrm->mutex); | |
286 | ||
287 | list_for_each_entry(crtc, &imxdrm->crtc_list, list) | |
288 | module_put(crtc->owner); | |
289 | ||
290 | list_for_each_entry(con, &imxdrm->connector_list, list) | |
291 | module_put(con->owner); | |
292 | ||
293 | list_for_each_entry(enc, &imxdrm->encoder_list, list) | |
294 | module_put(enc->owner); | |
295 | ||
296 | imxdrm->references--; | |
297 | ||
298 | mutex_unlock(&imxdrm->mutex); | |
299 | } | |
300 | EXPORT_SYMBOL_GPL(imx_drm_device_put); | |
301 | ||
302 | static int drm_mode_group_reinit(struct drm_device *dev) | |
303 | { | |
304 | struct drm_mode_group *group = &dev->primary->mode_group; | |
305 | uint32_t *id_list = group->id_list; | |
306 | int ret; | |
307 | ||
308 | ret = drm_mode_group_init_legacy_group(dev, group); | |
309 | if (ret < 0) | |
310 | return ret; | |
311 | ||
312 | kfree(id_list); | |
313 | return 0; | |
314 | } | |
315 | ||
316 | /* | |
317 | * register an encoder to the drm core | |
318 | */ | |
319 | static int imx_drm_encoder_register(struct imx_drm_encoder *imx_drm_encoder) | |
320 | { | |
321 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
322 | ||
323 | INIT_LIST_HEAD(&imx_drm_encoder->possible_crtcs); | |
324 | ||
325 | drm_encoder_init(imxdrm->drm, imx_drm_encoder->encoder, | |
326 | imx_drm_encoder->encoder->funcs, | |
327 | imx_drm_encoder->encoder->encoder_type); | |
328 | ||
329 | drm_mode_group_reinit(imxdrm->drm); | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | /* | |
335 | * unregister an encoder from the drm core | |
336 | */ | |
337 | static void imx_drm_encoder_unregister(struct imx_drm_encoder | |
338 | *imx_drm_encoder) | |
339 | { | |
340 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
341 | ||
342 | drm_encoder_cleanup(imx_drm_encoder->encoder); | |
343 | ||
344 | drm_mode_group_reinit(imxdrm->drm); | |
345 | } | |
346 | ||
347 | /* | |
348 | * register a connector to the drm core | |
349 | */ | |
350 | static int imx_drm_connector_register( | |
351 | struct imx_drm_connector *imx_drm_connector) | |
352 | { | |
353 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
354 | ||
355 | drm_connector_init(imxdrm->drm, imx_drm_connector->connector, | |
356 | imx_drm_connector->connector->funcs, | |
357 | imx_drm_connector->connector->connector_type); | |
358 | drm_mode_group_reinit(imxdrm->drm); | |
359 | ||
360 | return drm_sysfs_connector_add(imx_drm_connector->connector); | |
361 | } | |
362 | ||
363 | /* | |
364 | * unregister a connector from the drm core | |
365 | */ | |
366 | static void imx_drm_connector_unregister( | |
367 | struct imx_drm_connector *imx_drm_connector) | |
368 | { | |
369 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
370 | ||
371 | drm_sysfs_connector_remove(imx_drm_connector->connector); | |
372 | drm_connector_cleanup(imx_drm_connector->connector); | |
373 | ||
374 | drm_mode_group_reinit(imxdrm->drm); | |
375 | } | |
376 | ||
377 | /* | |
378 | * register a crtc to the drm core | |
379 | */ | |
380 | static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc) | |
381 | { | |
382 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
383 | int ret; | |
384 | ||
385 | drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc, | |
386 | imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs); | |
387 | ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256); | |
388 | if (ret) | |
389 | return ret; | |
390 | ||
391 | drm_crtc_helper_add(imx_drm_crtc->crtc, | |
392 | imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs); | |
393 | ||
394 | drm_mode_group_reinit(imxdrm->drm); | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | /* | |
400 | * Called by the CRTC driver when all CRTCs are registered. This | |
401 | * puts all the pieces together and initializes the driver. | |
402 | * Once this is called no more CRTCs can be registered since | |
403 | * the drm core has hardcoded the number of crtcs in several | |
404 | * places. | |
405 | */ | |
406 | static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags) | |
407 | { | |
408 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
409 | int ret; | |
410 | ||
411 | imxdrm->drm = drm; | |
412 | ||
413 | drm->dev_private = imxdrm; | |
414 | ||
415 | /* | |
416 | * enable drm irq mode. | |
417 | * - with irq_enabled = 1, we can use the vblank feature. | |
418 | * | |
419 | * P.S. note that we wouldn't use drm irq handler but | |
420 | * just specific driver own one instead because | |
421 | * drm framework supports only one irq handler and | |
422 | * drivers can well take care of their interrupts | |
423 | */ | |
424 | drm->irq_enabled = 1; | |
425 | ||
426 | drm_mode_config_init(drm); | |
427 | imx_drm_mode_config_init(drm); | |
428 | ||
429 | mutex_lock(&imxdrm->mutex); | |
430 | ||
431 | drm_kms_helper_poll_init(imxdrm->drm); | |
432 | ||
433 | /* setup the grouping for the legacy output */ | |
434 | ret = drm_mode_group_init_legacy_group(imxdrm->drm, | |
435 | &imxdrm->drm->primary->mode_group); | |
436 | if (ret) | |
437 | goto err_init; | |
438 | ||
439 | ret = drm_vblank_init(imxdrm->drm, MAX_CRTC); | |
440 | if (ret) | |
441 | goto err_init; | |
442 | ||
443 | /* | |
444 | * with vblank_disable_allowed = 1, vblank interrupt will be disabled | |
445 | * by drm timer once a current process gives up ownership of | |
446 | * vblank event.(after drm_vblank_put function is called) | |
447 | */ | |
448 | imxdrm->drm->vblank_disable_allowed = 1; | |
449 | ||
450 | ret = 0; | |
451 | ||
452 | err_init: | |
453 | mutex_unlock(&imxdrm->mutex); | |
454 | ||
455 | return ret; | |
456 | } | |
457 | ||
458 | static void imx_drm_update_possible_crtcs(void) | |
459 | { | |
460 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
461 | struct imx_drm_crtc *imx_drm_crtc; | |
462 | struct imx_drm_encoder *enc; | |
463 | struct crtc_cookie *cookie; | |
464 | ||
465 | list_for_each_entry(enc, &imxdrm->encoder_list, list) { | |
466 | u32 possible_crtcs = 0; | |
467 | ||
468 | list_for_each_entry(cookie, &enc->possible_crtcs, list) { | |
469 | list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) { | |
470 | if (imx_drm_crtc->cookie.cookie == cookie->cookie && | |
471 | imx_drm_crtc->cookie.id == cookie->id) { | |
472 | possible_crtcs |= 1 << imx_drm_crtc->pipe; | |
473 | } | |
474 | } | |
475 | } | |
476 | enc->encoder->possible_crtcs = possible_crtcs; | |
477 | enc->encoder->possible_clones = possible_crtcs; | |
478 | } | |
479 | } | |
480 | ||
481 | /* | |
482 | * imx_drm_add_crtc - add a new crtc | |
483 | * | |
484 | * The return value if !NULL is a cookie for the caller to pass to | |
485 | * imx_drm_remove_crtc later. | |
486 | */ | |
487 | int imx_drm_add_crtc(struct drm_crtc *crtc, | |
488 | struct imx_drm_crtc **new_crtc, | |
489 | const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs, | |
490 | struct module *owner, void *cookie, int id) | |
491 | { | |
492 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
493 | struct imx_drm_crtc *imx_drm_crtc; | |
e692da4d SH |
494 | int ret; |
495 | ||
496 | mutex_lock(&imxdrm->mutex); | |
497 | ||
498 | if (imxdrm->references) { | |
499 | ret = -EBUSY; | |
500 | goto err_busy; | |
501 | } | |
502 | ||
503 | imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL); | |
504 | if (!imx_drm_crtc) { | |
505 | ret = -ENOMEM; | |
506 | goto err_alloc; | |
507 | } | |
508 | ||
509 | imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs; | |
510 | imx_drm_crtc->pipe = imxdrm->pipes++; | |
511 | imx_drm_crtc->cookie.cookie = cookie; | |
512 | imx_drm_crtc->cookie.id = id; | |
513 | ||
e692da4d SH |
514 | imx_drm_crtc->crtc = crtc; |
515 | imx_drm_crtc->imxdrm = imxdrm; | |
516 | ||
517 | imx_drm_crtc->owner = owner; | |
518 | ||
519 | list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list); | |
520 | ||
521 | *new_crtc = imx_drm_crtc; | |
522 | ||
523 | ret = imx_drm_crtc_register(imx_drm_crtc); | |
524 | if (ret) | |
525 | goto err_register; | |
526 | ||
527 | imx_drm_update_possible_crtcs(); | |
528 | ||
529 | mutex_unlock(&imxdrm->mutex); | |
530 | ||
531 | return 0; | |
532 | ||
533 | err_register: | |
534 | kfree(imx_drm_crtc); | |
535 | err_alloc: | |
536 | err_busy: | |
537 | mutex_unlock(&imxdrm->mutex); | |
538 | return ret; | |
539 | } | |
540 | EXPORT_SYMBOL_GPL(imx_drm_add_crtc); | |
541 | ||
542 | /* | |
543 | * imx_drm_remove_crtc - remove a crtc | |
544 | */ | |
545 | int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc) | |
546 | { | |
547 | struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm; | |
548 | ||
549 | mutex_lock(&imxdrm->mutex); | |
550 | ||
551 | drm_crtc_cleanup(imx_drm_crtc->crtc); | |
552 | ||
553 | list_del(&imx_drm_crtc->list); | |
554 | ||
555 | drm_mode_group_reinit(imxdrm->drm); | |
556 | ||
557 | mutex_unlock(&imxdrm->mutex); | |
558 | ||
559 | kfree(imx_drm_crtc); | |
560 | ||
561 | return 0; | |
562 | } | |
563 | EXPORT_SYMBOL_GPL(imx_drm_remove_crtc); | |
564 | ||
565 | /* | |
566 | * imx_drm_add_encoder - add a new encoder | |
567 | */ | |
568 | int imx_drm_add_encoder(struct drm_encoder *encoder, | |
569 | struct imx_drm_encoder **newenc, struct module *owner) | |
570 | { | |
571 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
572 | struct imx_drm_encoder *imx_drm_encoder; | |
573 | int ret; | |
574 | ||
575 | mutex_lock(&imxdrm->mutex); | |
576 | ||
577 | if (imxdrm->references) { | |
578 | ret = -EBUSY; | |
579 | goto err_busy; | |
580 | } | |
581 | ||
582 | imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL); | |
583 | if (!imx_drm_encoder) { | |
584 | ret = -ENOMEM; | |
585 | goto err_alloc; | |
586 | } | |
587 | ||
588 | imx_drm_encoder->encoder = encoder; | |
589 | imx_drm_encoder->owner = owner; | |
590 | ||
591 | ret = imx_drm_encoder_register(imx_drm_encoder); | |
592 | if (ret) { | |
e692da4d SH |
593 | ret = -ENOMEM; |
594 | goto err_register; | |
595 | } | |
596 | ||
597 | list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list); | |
598 | ||
599 | *newenc = imx_drm_encoder; | |
600 | ||
601 | mutex_unlock(&imxdrm->mutex); | |
602 | ||
603 | return 0; | |
604 | ||
605 | err_register: | |
606 | kfree(imx_drm_encoder); | |
607 | err_alloc: | |
608 | err_busy: | |
609 | mutex_unlock(&imxdrm->mutex); | |
610 | ||
611 | return ret; | |
612 | } | |
613 | EXPORT_SYMBOL_GPL(imx_drm_add_encoder); | |
614 | ||
615 | int imx_drm_encoder_add_possible_crtcs( | |
616 | struct imx_drm_encoder *imx_drm_encoder, | |
617 | struct device_node *np) | |
618 | { | |
619 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
620 | struct of_phandle_args args; | |
621 | struct crtc_cookie *c; | |
622 | int ret = 0; | |
623 | int i; | |
624 | ||
625 | if (!list_empty(&imx_drm_encoder->possible_crtcs)) | |
626 | return -EBUSY; | |
627 | ||
628 | for (i = 0; !ret; i++) { | |
629 | ret = of_parse_phandle_with_args(np, "crtcs", | |
630 | "#crtc-cells", i, &args); | |
631 | if (ret < 0) | |
632 | break; | |
633 | ||
634 | c = kzalloc(sizeof(*c), GFP_KERNEL); | |
635 | if (!c) { | |
636 | of_node_put(args.np); | |
637 | return -ENOMEM; | |
638 | } | |
639 | ||
640 | c->cookie = args.np; | |
641 | c->id = args.args_count > 0 ? args.args[0] : 0; | |
642 | ||
643 | of_node_put(args.np); | |
644 | ||
645 | mutex_lock(&imxdrm->mutex); | |
646 | ||
647 | list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs); | |
648 | ||
649 | mutex_unlock(&imxdrm->mutex); | |
650 | } | |
651 | ||
652 | imx_drm_update_possible_crtcs(); | |
653 | ||
654 | return 0; | |
655 | } | |
aecfbdb1 | 656 | EXPORT_SYMBOL_GPL(imx_drm_encoder_add_possible_crtcs); |
e692da4d SH |
657 | |
658 | int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder, | |
659 | struct drm_crtc *crtc) | |
660 | { | |
661 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
662 | struct imx_drm_crtc *imx_crtc; | |
663 | int i = 0; | |
664 | ||
665 | mutex_lock(&imxdrm->mutex); | |
666 | ||
667 | list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) { | |
668 | if (imx_crtc->crtc == crtc) | |
669 | goto found; | |
670 | i++; | |
671 | } | |
672 | ||
673 | mutex_unlock(&imxdrm->mutex); | |
674 | ||
675 | return -EINVAL; | |
676 | found: | |
677 | mutex_unlock(&imxdrm->mutex); | |
678 | ||
679 | return i; | |
680 | } | |
681 | ||
682 | /* | |
683 | * imx_drm_remove_encoder - remove an encoder | |
684 | */ | |
685 | int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder) | |
686 | { | |
687 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
688 | struct crtc_cookie *c, *tmp; | |
689 | ||
690 | mutex_lock(&imxdrm->mutex); | |
691 | ||
692 | imx_drm_encoder_unregister(imx_drm_encoder); | |
693 | ||
694 | list_del(&imx_drm_encoder->list); | |
695 | ||
696 | list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs, | |
697 | list) | |
698 | kfree(c); | |
699 | ||
700 | mutex_unlock(&imxdrm->mutex); | |
701 | ||
702 | kfree(imx_drm_encoder); | |
703 | ||
704 | return 0; | |
705 | } | |
706 | EXPORT_SYMBOL_GPL(imx_drm_remove_encoder); | |
707 | ||
708 | /* | |
709 | * imx_drm_add_connector - add a connector | |
710 | */ | |
711 | int imx_drm_add_connector(struct drm_connector *connector, | |
712 | struct imx_drm_connector **new_con, | |
713 | struct module *owner) | |
714 | { | |
715 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
716 | struct imx_drm_connector *imx_drm_connector; | |
717 | int ret; | |
718 | ||
719 | mutex_lock(&imxdrm->mutex); | |
720 | ||
721 | if (imxdrm->references) { | |
722 | ret = -EBUSY; | |
723 | goto err_busy; | |
724 | } | |
725 | ||
726 | imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL); | |
727 | if (!imx_drm_connector) { | |
728 | ret = -ENOMEM; | |
729 | goto err_alloc; | |
730 | } | |
731 | ||
732 | imx_drm_connector->connector = connector; | |
733 | imx_drm_connector->owner = owner; | |
734 | ||
735 | ret = imx_drm_connector_register(imx_drm_connector); | |
736 | if (ret) | |
737 | goto err_register; | |
738 | ||
739 | list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list); | |
740 | ||
741 | *new_con = imx_drm_connector; | |
742 | ||
743 | mutex_unlock(&imxdrm->mutex); | |
744 | ||
745 | return 0; | |
746 | ||
747 | err_register: | |
748 | kfree(imx_drm_connector); | |
749 | err_alloc: | |
750 | err_busy: | |
751 | mutex_unlock(&imxdrm->mutex); | |
752 | ||
753 | return ret; | |
754 | } | |
755 | EXPORT_SYMBOL_GPL(imx_drm_add_connector); | |
756 | ||
757 | void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper) | |
758 | { | |
759 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
760 | ||
761 | imxdrm->fbhelper = fbdev_helper; | |
762 | } | |
763 | EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set); | |
764 | ||
765 | /* | |
766 | * imx_drm_remove_connector - remove a connector | |
767 | */ | |
768 | int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector) | |
769 | { | |
770 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
771 | ||
772 | mutex_lock(&imxdrm->mutex); | |
773 | ||
774 | imx_drm_connector_unregister(imx_drm_connector); | |
775 | ||
776 | list_del(&imx_drm_connector->list); | |
777 | ||
778 | mutex_unlock(&imxdrm->mutex); | |
779 | ||
780 | kfree(imx_drm_connector); | |
781 | ||
782 | return 0; | |
783 | } | |
784 | EXPORT_SYMBOL_GPL(imx_drm_remove_connector); | |
785 | ||
786 | static struct drm_ioctl_desc imx_drm_ioctls[] = { | |
787 | /* none so far */ | |
788 | }; | |
789 | ||
790 | static struct drm_driver imx_drm_driver = { | |
791 | .driver_features = DRIVER_MODESET | DRIVER_GEM, | |
792 | .load = imx_drm_driver_load, | |
793 | .unload = imx_drm_driver_unload, | |
794 | .firstopen = imx_drm_driver_firstopen, | |
795 | .lastclose = imx_drm_driver_lastclose, | |
796 | .gem_free_object = drm_gem_cma_free_object, | |
797 | .gem_vm_ops = &drm_gem_cma_vm_ops, | |
798 | .dumb_create = drm_gem_cma_dumb_create, | |
799 | .dumb_map_offset = drm_gem_cma_dumb_map_offset, | |
800 | .dumb_destroy = drm_gem_cma_dumb_destroy, | |
801 | ||
802 | .get_vblank_counter = drm_vblank_count, | |
803 | .enable_vblank = imx_drm_enable_vblank, | |
804 | .disable_vblank = imx_drm_disable_vblank, | |
805 | .ioctls = imx_drm_ioctls, | |
806 | .num_ioctls = ARRAY_SIZE(imx_drm_ioctls), | |
807 | .fops = &imx_drm_driver_fops, | |
808 | .name = "imx-drm", | |
809 | .desc = "i.MX DRM graphics", | |
810 | .date = "20120507", | |
811 | .major = 1, | |
812 | .minor = 0, | |
813 | .patchlevel = 0, | |
814 | }; | |
815 | ||
816 | static int imx_drm_platform_probe(struct platform_device *pdev) | |
817 | { | |
818 | imx_drm_device->dev = &pdev->dev; | |
819 | ||
820 | return drm_platform_init(&imx_drm_driver, pdev); | |
821 | } | |
822 | ||
823 | static int imx_drm_platform_remove(struct platform_device *pdev) | |
824 | { | |
825 | drm_platform_exit(&imx_drm_driver, pdev); | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
830 | static struct platform_driver imx_drm_pdrv = { | |
831 | .probe = imx_drm_platform_probe, | |
99c28f10 | 832 | .remove = imx_drm_platform_remove, |
e692da4d SH |
833 | .driver = { |
834 | .owner = THIS_MODULE, | |
835 | .name = "imx-drm", | |
836 | }, | |
837 | }; | |
838 | ||
839 | static struct platform_device *imx_drm_pdev; | |
840 | ||
841 | static int __init imx_drm_init(void) | |
842 | { | |
843 | int ret; | |
844 | ||
845 | imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL); | |
846 | if (!imx_drm_device) | |
847 | return -ENOMEM; | |
848 | ||
849 | mutex_init(&imx_drm_device->mutex); | |
850 | INIT_LIST_HEAD(&imx_drm_device->crtc_list); | |
851 | INIT_LIST_HEAD(&imx_drm_device->connector_list); | |
852 | INIT_LIST_HEAD(&imx_drm_device->encoder_list); | |
853 | ||
854 | imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0); | |
855 | if (!imx_drm_pdev) { | |
856 | ret = -EINVAL; | |
857 | goto err_pdev; | |
858 | } | |
859 | ||
860 | imx_drm_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32), | |
861 | ||
862 | ret = platform_driver_register(&imx_drm_pdrv); | |
863 | if (ret) | |
864 | goto err_pdrv; | |
865 | ||
866 | return 0; | |
867 | ||
868 | err_pdrv: | |
869 | platform_device_unregister(imx_drm_pdev); | |
870 | err_pdev: | |
871 | kfree(imx_drm_device); | |
872 | ||
873 | return ret; | |
874 | } | |
875 | ||
876 | static void __exit imx_drm_exit(void) | |
877 | { | |
878 | platform_device_unregister(imx_drm_pdev); | |
879 | platform_driver_unregister(&imx_drm_pdrv); | |
880 | ||
881 | kfree(imx_drm_device); | |
882 | } | |
883 | ||
884 | module_init(imx_drm_init); | |
885 | module_exit(imx_drm_exit); | |
886 | ||
887 | MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); | |
888 | MODULE_DESCRIPTION("i.MX drm driver core"); | |
889 | MODULE_LICENSE("GPL"); |