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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; | |
e692da4d SH |
44 | int pipes; |
45 | struct drm_fbdev_cma *fbhelper; | |
46 | }; | |
47 | ||
48 | struct imx_drm_crtc { | |
49 | struct drm_crtc *crtc; | |
50 | struct list_head list; | |
51 | struct imx_drm_device *imxdrm; | |
52 | int pipe; | |
53 | struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs; | |
54 | struct module *owner; | |
55 | struct crtc_cookie cookie; | |
56 | }; | |
57 | ||
58 | struct imx_drm_encoder { | |
59 | struct drm_encoder *encoder; | |
60 | struct list_head list; | |
61 | struct module *owner; | |
62 | struct list_head possible_crtcs; | |
63 | }; | |
64 | ||
65 | struct imx_drm_connector { | |
66 | struct drm_connector *connector; | |
67 | struct list_head list; | |
68 | struct module *owner; | |
69 | }; | |
70 | ||
e692da4d SH |
71 | static void imx_drm_driver_lastclose(struct drm_device *drm) |
72 | { | |
73 | struct imx_drm_device *imxdrm = drm->dev_private; | |
74 | ||
75 | if (imxdrm->fbhelper) | |
76 | drm_fbdev_cma_restore_mode(imxdrm->fbhelper); | |
e692da4d SH |
77 | } |
78 | ||
79 | static int imx_drm_driver_unload(struct drm_device *drm) | |
80 | { | |
81 | struct imx_drm_device *imxdrm = drm->dev_private; | |
82 | ||
aaba4b58 DV |
83 | imx_drm_device_put(); |
84 | ||
e692da4d SH |
85 | drm_mode_config_cleanup(imxdrm->drm); |
86 | drm_kms_helper_poll_fini(imxdrm->drm); | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | /* | |
92 | * We don't care at all for crtc numbers, but the core expects the | |
93 | * crtcs to be numbered | |
94 | */ | |
95 | static struct imx_drm_crtc *imx_drm_crtc_by_num(struct imx_drm_device *imxdrm, | |
96 | int num) | |
97 | { | |
98 | struct imx_drm_crtc *imx_drm_crtc; | |
99 | ||
100 | list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) | |
101 | if (imx_drm_crtc->pipe == num) | |
102 | return imx_drm_crtc; | |
103 | return NULL; | |
104 | } | |
105 | ||
2ea42608 PZ |
106 | int imx_drm_crtc_panel_format_pins(struct drm_crtc *crtc, u32 encoder_type, |
107 | u32 interface_pix_fmt, int hsync_pin, int vsync_pin) | |
e692da4d SH |
108 | { |
109 | struct imx_drm_device *imxdrm = crtc->dev->dev_private; | |
110 | struct imx_drm_crtc *imx_crtc; | |
111 | struct imx_drm_crtc_helper_funcs *helper; | |
112 | ||
113 | mutex_lock(&imxdrm->mutex); | |
114 | ||
115 | list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) | |
116 | if (imx_crtc->crtc == crtc) | |
117 | goto found; | |
118 | ||
119 | mutex_unlock(&imxdrm->mutex); | |
120 | ||
121 | return -EINVAL; | |
122 | found: | |
123 | mutex_unlock(&imxdrm->mutex); | |
124 | ||
125 | helper = &imx_crtc->imx_drm_helper_funcs; | |
126 | if (helper->set_interface_pix_fmt) | |
127 | return helper->set_interface_pix_fmt(crtc, | |
2ea42608 PZ |
128 | encoder_type, interface_pix_fmt, |
129 | hsync_pin, vsync_pin); | |
e692da4d SH |
130 | return 0; |
131 | } | |
2ea42608 PZ |
132 | EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format_pins); |
133 | ||
134 | int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type, | |
135 | u32 interface_pix_fmt) | |
136 | { | |
137 | return imx_drm_crtc_panel_format_pins(crtc, encoder_type, | |
079461bf | 138 | interface_pix_fmt, 2, 3); |
2ea42608 | 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, | |
e692da4d SH |
201 | .read = drm_read, |
202 | .llseek = noop_llseek, | |
203 | }; | |
204 | ||
205 | static struct imx_drm_device *imx_drm_device; | |
206 | ||
207 | static struct imx_drm_device *__imx_drm_device(void) | |
208 | { | |
209 | return imx_drm_device; | |
210 | } | |
211 | ||
212 | struct 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 | ||
e692da4d SH |
219 | list_for_each_entry(enc, &imxdrm->encoder_list, list) { |
220 | if (!try_module_get(enc->owner)) { | |
221 | dev_err(imxdrm->dev, "could not get module %s\n", | |
222 | module_name(enc->owner)); | |
223 | goto unwind_enc; | |
224 | } | |
225 | } | |
226 | ||
227 | list_for_each_entry(con, &imxdrm->connector_list, list) { | |
228 | if (!try_module_get(con->owner)) { | |
229 | dev_err(imxdrm->dev, "could not get module %s\n", | |
230 | module_name(con->owner)); | |
231 | goto unwind_con; | |
232 | } | |
233 | } | |
234 | ||
235 | list_for_each_entry(crtc, &imxdrm->crtc_list, list) { | |
236 | if (!try_module_get(crtc->owner)) { | |
237 | dev_err(imxdrm->dev, "could not get module %s\n", | |
238 | module_name(crtc->owner)); | |
239 | goto unwind_crtc; | |
240 | } | |
241 | } | |
242 | ||
e692da4d SH |
243 | return imxdrm->drm; |
244 | ||
245 | unwind_crtc: | |
246 | list_for_each_entry_continue_reverse(crtc, &imxdrm->crtc_list, list) | |
247 | module_put(crtc->owner); | |
248 | unwind_con: | |
249 | list_for_each_entry_continue_reverse(con, &imxdrm->connector_list, list) | |
250 | module_put(con->owner); | |
251 | unwind_enc: | |
252 | list_for_each_entry_continue_reverse(enc, &imxdrm->encoder_list, list) | |
253 | module_put(enc->owner); | |
254 | ||
255 | mutex_unlock(&imxdrm->mutex); | |
256 | ||
257 | return NULL; | |
258 | ||
259 | } | |
260 | EXPORT_SYMBOL_GPL(imx_drm_device_get); | |
261 | ||
262 | void imx_drm_device_put(void) | |
263 | { | |
264 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
265 | struct imx_drm_encoder *enc; | |
266 | struct imx_drm_connector *con; | |
267 | struct imx_drm_crtc *crtc; | |
268 | ||
269 | mutex_lock(&imxdrm->mutex); | |
270 | ||
271 | list_for_each_entry(crtc, &imxdrm->crtc_list, list) | |
272 | module_put(crtc->owner); | |
273 | ||
274 | list_for_each_entry(con, &imxdrm->connector_list, list) | |
275 | module_put(con->owner); | |
276 | ||
277 | list_for_each_entry(enc, &imxdrm->encoder_list, list) | |
278 | module_put(enc->owner); | |
279 | ||
e692da4d SH |
280 | mutex_unlock(&imxdrm->mutex); |
281 | } | |
282 | EXPORT_SYMBOL_GPL(imx_drm_device_put); | |
283 | ||
284 | static int drm_mode_group_reinit(struct drm_device *dev) | |
285 | { | |
286 | struct drm_mode_group *group = &dev->primary->mode_group; | |
287 | uint32_t *id_list = group->id_list; | |
288 | int ret; | |
289 | ||
290 | ret = drm_mode_group_init_legacy_group(dev, group); | |
291 | if (ret < 0) | |
292 | return ret; | |
293 | ||
294 | kfree(id_list); | |
295 | return 0; | |
296 | } | |
297 | ||
298 | /* | |
299 | * register an encoder to the drm core | |
300 | */ | |
301 | static int imx_drm_encoder_register(struct imx_drm_encoder *imx_drm_encoder) | |
302 | { | |
303 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
304 | ||
305 | INIT_LIST_HEAD(&imx_drm_encoder->possible_crtcs); | |
306 | ||
307 | drm_encoder_init(imxdrm->drm, imx_drm_encoder->encoder, | |
308 | imx_drm_encoder->encoder->funcs, | |
309 | imx_drm_encoder->encoder->encoder_type); | |
310 | ||
311 | drm_mode_group_reinit(imxdrm->drm); | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | /* | |
317 | * unregister an encoder from the drm core | |
318 | */ | |
319 | static void imx_drm_encoder_unregister(struct imx_drm_encoder | |
320 | *imx_drm_encoder) | |
321 | { | |
322 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
323 | ||
324 | drm_encoder_cleanup(imx_drm_encoder->encoder); | |
325 | ||
326 | drm_mode_group_reinit(imxdrm->drm); | |
327 | } | |
328 | ||
329 | /* | |
330 | * register a connector to the drm core | |
331 | */ | |
332 | static int imx_drm_connector_register( | |
333 | struct imx_drm_connector *imx_drm_connector) | |
334 | { | |
335 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
336 | ||
337 | drm_connector_init(imxdrm->drm, imx_drm_connector->connector, | |
338 | imx_drm_connector->connector->funcs, | |
339 | imx_drm_connector->connector->connector_type); | |
340 | drm_mode_group_reinit(imxdrm->drm); | |
341 | ||
342 | return drm_sysfs_connector_add(imx_drm_connector->connector); | |
343 | } | |
344 | ||
345 | /* | |
346 | * unregister a connector from the drm core | |
347 | */ | |
348 | static void imx_drm_connector_unregister( | |
349 | struct imx_drm_connector *imx_drm_connector) | |
350 | { | |
351 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
352 | ||
353 | drm_sysfs_connector_remove(imx_drm_connector->connector); | |
354 | drm_connector_cleanup(imx_drm_connector->connector); | |
355 | ||
356 | drm_mode_group_reinit(imxdrm->drm); | |
357 | } | |
358 | ||
359 | /* | |
360 | * register a crtc to the drm core | |
361 | */ | |
362 | static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc) | |
363 | { | |
364 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
365 | int ret; | |
366 | ||
367 | drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc, | |
368 | imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs); | |
369 | ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256); | |
370 | if (ret) | |
371 | return ret; | |
372 | ||
373 | drm_crtc_helper_add(imx_drm_crtc->crtc, | |
374 | imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs); | |
375 | ||
376 | drm_mode_group_reinit(imxdrm->drm); | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | /* | |
382 | * Called by the CRTC driver when all CRTCs are registered. This | |
383 | * puts all the pieces together and initializes the driver. | |
384 | * Once this is called no more CRTCs can be registered since | |
385 | * the drm core has hardcoded the number of crtcs in several | |
386 | * places. | |
387 | */ | |
388 | static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags) | |
389 | { | |
390 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
391 | int ret; | |
392 | ||
393 | imxdrm->drm = drm; | |
394 | ||
395 | drm->dev_private = imxdrm; | |
396 | ||
397 | /* | |
398 | * enable drm irq mode. | |
4423843c | 399 | * - with irq_enabled = true, we can use the vblank feature. |
e692da4d SH |
400 | * |
401 | * P.S. note that we wouldn't use drm irq handler but | |
402 | * just specific driver own one instead because | |
403 | * drm framework supports only one irq handler and | |
404 | * drivers can well take care of their interrupts | |
405 | */ | |
4423843c | 406 | drm->irq_enabled = true; |
e692da4d SH |
407 | |
408 | drm_mode_config_init(drm); | |
409 | imx_drm_mode_config_init(drm); | |
410 | ||
411 | mutex_lock(&imxdrm->mutex); | |
412 | ||
413 | drm_kms_helper_poll_init(imxdrm->drm); | |
414 | ||
415 | /* setup the grouping for the legacy output */ | |
416 | ret = drm_mode_group_init_legacy_group(imxdrm->drm, | |
417 | &imxdrm->drm->primary->mode_group); | |
418 | if (ret) | |
419 | goto err_init; | |
420 | ||
421 | ret = drm_vblank_init(imxdrm->drm, MAX_CRTC); | |
422 | if (ret) | |
423 | goto err_init; | |
424 | ||
425 | /* | |
ba0bf120 | 426 | * with vblank_disable_allowed = true, vblank interrupt will be disabled |
e692da4d SH |
427 | * by drm timer once a current process gives up ownership of |
428 | * vblank event.(after drm_vblank_put function is called) | |
429 | */ | |
ba0bf120 | 430 | imxdrm->drm->vblank_disable_allowed = true; |
e692da4d | 431 | |
aaba4b58 DV |
432 | if (!imx_drm_device_get()) |
433 | ret = -EINVAL; | |
434 | ||
e692da4d SH |
435 | ret = 0; |
436 | ||
437 | err_init: | |
438 | mutex_unlock(&imxdrm->mutex); | |
439 | ||
440 | return ret; | |
441 | } | |
442 | ||
443 | static void imx_drm_update_possible_crtcs(void) | |
444 | { | |
445 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
446 | struct imx_drm_crtc *imx_drm_crtc; | |
447 | struct imx_drm_encoder *enc; | |
448 | struct crtc_cookie *cookie; | |
449 | ||
450 | list_for_each_entry(enc, &imxdrm->encoder_list, list) { | |
451 | u32 possible_crtcs = 0; | |
452 | ||
453 | list_for_each_entry(cookie, &enc->possible_crtcs, list) { | |
454 | list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) { | |
455 | if (imx_drm_crtc->cookie.cookie == cookie->cookie && | |
456 | imx_drm_crtc->cookie.id == cookie->id) { | |
457 | possible_crtcs |= 1 << imx_drm_crtc->pipe; | |
458 | } | |
459 | } | |
460 | } | |
461 | enc->encoder->possible_crtcs = possible_crtcs; | |
462 | enc->encoder->possible_clones = possible_crtcs; | |
463 | } | |
464 | } | |
465 | ||
466 | /* | |
467 | * imx_drm_add_crtc - add a new crtc | |
468 | * | |
469 | * The return value if !NULL is a cookie for the caller to pass to | |
470 | * imx_drm_remove_crtc later. | |
471 | */ | |
472 | int imx_drm_add_crtc(struct drm_crtc *crtc, | |
473 | struct imx_drm_crtc **new_crtc, | |
474 | const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs, | |
475 | struct module *owner, void *cookie, int id) | |
476 | { | |
477 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
478 | struct imx_drm_crtc *imx_drm_crtc; | |
e692da4d SH |
479 | int ret; |
480 | ||
481 | mutex_lock(&imxdrm->mutex); | |
482 | ||
099326d8 | 483 | if (imxdrm->drm->open_count) { |
e692da4d SH |
484 | ret = -EBUSY; |
485 | goto err_busy; | |
486 | } | |
487 | ||
488 | imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL); | |
489 | if (!imx_drm_crtc) { | |
490 | ret = -ENOMEM; | |
491 | goto err_alloc; | |
492 | } | |
493 | ||
494 | imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs; | |
495 | imx_drm_crtc->pipe = imxdrm->pipes++; | |
496 | imx_drm_crtc->cookie.cookie = cookie; | |
497 | imx_drm_crtc->cookie.id = id; | |
498 | ||
e692da4d SH |
499 | imx_drm_crtc->crtc = crtc; |
500 | imx_drm_crtc->imxdrm = imxdrm; | |
501 | ||
502 | imx_drm_crtc->owner = owner; | |
503 | ||
504 | list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list); | |
505 | ||
506 | *new_crtc = imx_drm_crtc; | |
507 | ||
508 | ret = imx_drm_crtc_register(imx_drm_crtc); | |
509 | if (ret) | |
510 | goto err_register; | |
511 | ||
512 | imx_drm_update_possible_crtcs(); | |
513 | ||
514 | mutex_unlock(&imxdrm->mutex); | |
515 | ||
516 | return 0; | |
517 | ||
518 | err_register: | |
519 | kfree(imx_drm_crtc); | |
520 | err_alloc: | |
521 | err_busy: | |
522 | mutex_unlock(&imxdrm->mutex); | |
523 | return ret; | |
524 | } | |
525 | EXPORT_SYMBOL_GPL(imx_drm_add_crtc); | |
526 | ||
527 | /* | |
528 | * imx_drm_remove_crtc - remove a crtc | |
529 | */ | |
530 | int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc) | |
531 | { | |
532 | struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm; | |
533 | ||
534 | mutex_lock(&imxdrm->mutex); | |
535 | ||
536 | drm_crtc_cleanup(imx_drm_crtc->crtc); | |
537 | ||
538 | list_del(&imx_drm_crtc->list); | |
539 | ||
540 | drm_mode_group_reinit(imxdrm->drm); | |
541 | ||
542 | mutex_unlock(&imxdrm->mutex); | |
543 | ||
544 | kfree(imx_drm_crtc); | |
545 | ||
546 | return 0; | |
547 | } | |
548 | EXPORT_SYMBOL_GPL(imx_drm_remove_crtc); | |
549 | ||
550 | /* | |
551 | * imx_drm_add_encoder - add a new encoder | |
552 | */ | |
553 | int imx_drm_add_encoder(struct drm_encoder *encoder, | |
554 | struct imx_drm_encoder **newenc, struct module *owner) | |
555 | { | |
556 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
557 | struct imx_drm_encoder *imx_drm_encoder; | |
558 | int ret; | |
559 | ||
560 | mutex_lock(&imxdrm->mutex); | |
561 | ||
099326d8 | 562 | if (imxdrm->drm->open_count) { |
e692da4d SH |
563 | ret = -EBUSY; |
564 | goto err_busy; | |
565 | } | |
566 | ||
567 | imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL); | |
568 | if (!imx_drm_encoder) { | |
569 | ret = -ENOMEM; | |
570 | goto err_alloc; | |
571 | } | |
572 | ||
573 | imx_drm_encoder->encoder = encoder; | |
574 | imx_drm_encoder->owner = owner; | |
575 | ||
576 | ret = imx_drm_encoder_register(imx_drm_encoder); | |
577 | if (ret) { | |
e692da4d SH |
578 | ret = -ENOMEM; |
579 | goto err_register; | |
580 | } | |
581 | ||
582 | list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list); | |
583 | ||
584 | *newenc = imx_drm_encoder; | |
585 | ||
586 | mutex_unlock(&imxdrm->mutex); | |
587 | ||
588 | return 0; | |
589 | ||
590 | err_register: | |
591 | kfree(imx_drm_encoder); | |
592 | err_alloc: | |
593 | err_busy: | |
594 | mutex_unlock(&imxdrm->mutex); | |
595 | ||
596 | return ret; | |
597 | } | |
598 | EXPORT_SYMBOL_GPL(imx_drm_add_encoder); | |
599 | ||
600 | int imx_drm_encoder_add_possible_crtcs( | |
601 | struct imx_drm_encoder *imx_drm_encoder, | |
602 | struct device_node *np) | |
603 | { | |
604 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
605 | struct of_phandle_args args; | |
606 | struct crtc_cookie *c; | |
607 | int ret = 0; | |
608 | int i; | |
609 | ||
610 | if (!list_empty(&imx_drm_encoder->possible_crtcs)) | |
611 | return -EBUSY; | |
612 | ||
613 | for (i = 0; !ret; i++) { | |
614 | ret = of_parse_phandle_with_args(np, "crtcs", | |
615 | "#crtc-cells", i, &args); | |
616 | if (ret < 0) | |
617 | break; | |
618 | ||
619 | c = kzalloc(sizeof(*c), GFP_KERNEL); | |
620 | if (!c) { | |
621 | of_node_put(args.np); | |
622 | return -ENOMEM; | |
623 | } | |
624 | ||
625 | c->cookie = args.np; | |
626 | c->id = args.args_count > 0 ? args.args[0] : 0; | |
627 | ||
628 | of_node_put(args.np); | |
629 | ||
630 | mutex_lock(&imxdrm->mutex); | |
631 | ||
632 | list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs); | |
633 | ||
634 | mutex_unlock(&imxdrm->mutex); | |
635 | } | |
636 | ||
637 | imx_drm_update_possible_crtcs(); | |
638 | ||
639 | return 0; | |
640 | } | |
aecfbdb1 | 641 | EXPORT_SYMBOL_GPL(imx_drm_encoder_add_possible_crtcs); |
e692da4d SH |
642 | |
643 | int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder, | |
644 | struct drm_crtc *crtc) | |
645 | { | |
646 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
647 | struct imx_drm_crtc *imx_crtc; | |
648 | int i = 0; | |
649 | ||
650 | mutex_lock(&imxdrm->mutex); | |
651 | ||
652 | list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) { | |
653 | if (imx_crtc->crtc == crtc) | |
654 | goto found; | |
655 | i++; | |
656 | } | |
657 | ||
658 | mutex_unlock(&imxdrm->mutex); | |
659 | ||
660 | return -EINVAL; | |
661 | found: | |
662 | mutex_unlock(&imxdrm->mutex); | |
663 | ||
664 | return i; | |
665 | } | |
ea8d1583 | 666 | EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id); |
e692da4d SH |
667 | |
668 | /* | |
669 | * imx_drm_remove_encoder - remove an encoder | |
670 | */ | |
671 | int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder) | |
672 | { | |
673 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
674 | struct crtc_cookie *c, *tmp; | |
675 | ||
676 | mutex_lock(&imxdrm->mutex); | |
677 | ||
678 | imx_drm_encoder_unregister(imx_drm_encoder); | |
679 | ||
680 | list_del(&imx_drm_encoder->list); | |
681 | ||
682 | list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs, | |
683 | list) | |
684 | kfree(c); | |
685 | ||
686 | mutex_unlock(&imxdrm->mutex); | |
687 | ||
688 | kfree(imx_drm_encoder); | |
689 | ||
690 | return 0; | |
691 | } | |
692 | EXPORT_SYMBOL_GPL(imx_drm_remove_encoder); | |
693 | ||
694 | /* | |
695 | * imx_drm_add_connector - add a connector | |
696 | */ | |
697 | int imx_drm_add_connector(struct drm_connector *connector, | |
698 | struct imx_drm_connector **new_con, | |
699 | struct module *owner) | |
700 | { | |
701 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
702 | struct imx_drm_connector *imx_drm_connector; | |
703 | int ret; | |
704 | ||
705 | mutex_lock(&imxdrm->mutex); | |
706 | ||
099326d8 | 707 | if (imxdrm->drm->open_count) { |
e692da4d SH |
708 | ret = -EBUSY; |
709 | goto err_busy; | |
710 | } | |
711 | ||
712 | imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL); | |
713 | if (!imx_drm_connector) { | |
714 | ret = -ENOMEM; | |
715 | goto err_alloc; | |
716 | } | |
717 | ||
718 | imx_drm_connector->connector = connector; | |
719 | imx_drm_connector->owner = owner; | |
720 | ||
721 | ret = imx_drm_connector_register(imx_drm_connector); | |
722 | if (ret) | |
723 | goto err_register; | |
724 | ||
725 | list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list); | |
726 | ||
727 | *new_con = imx_drm_connector; | |
728 | ||
729 | mutex_unlock(&imxdrm->mutex); | |
730 | ||
731 | return 0; | |
732 | ||
733 | err_register: | |
734 | kfree(imx_drm_connector); | |
735 | err_alloc: | |
736 | err_busy: | |
737 | mutex_unlock(&imxdrm->mutex); | |
738 | ||
739 | return ret; | |
740 | } | |
741 | EXPORT_SYMBOL_GPL(imx_drm_add_connector); | |
742 | ||
743 | void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper) | |
744 | { | |
745 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
746 | ||
747 | imxdrm->fbhelper = fbdev_helper; | |
748 | } | |
749 | EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set); | |
750 | ||
751 | /* | |
752 | * imx_drm_remove_connector - remove a connector | |
753 | */ | |
754 | int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector) | |
755 | { | |
756 | struct imx_drm_device *imxdrm = __imx_drm_device(); | |
757 | ||
758 | mutex_lock(&imxdrm->mutex); | |
759 | ||
760 | imx_drm_connector_unregister(imx_drm_connector); | |
761 | ||
762 | list_del(&imx_drm_connector->list); | |
763 | ||
764 | mutex_unlock(&imxdrm->mutex); | |
765 | ||
766 | kfree(imx_drm_connector); | |
767 | ||
768 | return 0; | |
769 | } | |
770 | EXPORT_SYMBOL_GPL(imx_drm_remove_connector); | |
771 | ||
baa70943 | 772 | static const struct drm_ioctl_desc imx_drm_ioctls[] = { |
e692da4d SH |
773 | /* none so far */ |
774 | }; | |
775 | ||
776 | static struct drm_driver imx_drm_driver = { | |
777 | .driver_features = DRIVER_MODESET | DRIVER_GEM, | |
778 | .load = imx_drm_driver_load, | |
779 | .unload = imx_drm_driver_unload, | |
e692da4d SH |
780 | .lastclose = imx_drm_driver_lastclose, |
781 | .gem_free_object = drm_gem_cma_free_object, | |
782 | .gem_vm_ops = &drm_gem_cma_vm_ops, | |
783 | .dumb_create = drm_gem_cma_dumb_create, | |
784 | .dumb_map_offset = drm_gem_cma_dumb_map_offset, | |
43387b37 | 785 | .dumb_destroy = drm_gem_dumb_destroy, |
e692da4d SH |
786 | |
787 | .get_vblank_counter = drm_vblank_count, | |
788 | .enable_vblank = imx_drm_enable_vblank, | |
789 | .disable_vblank = imx_drm_disable_vblank, | |
790 | .ioctls = imx_drm_ioctls, | |
791 | .num_ioctls = ARRAY_SIZE(imx_drm_ioctls), | |
792 | .fops = &imx_drm_driver_fops, | |
793 | .name = "imx-drm", | |
794 | .desc = "i.MX DRM graphics", | |
795 | .date = "20120507", | |
796 | .major = 1, | |
797 | .minor = 0, | |
798 | .patchlevel = 0, | |
799 | }; | |
800 | ||
801 | static int imx_drm_platform_probe(struct platform_device *pdev) | |
802 | { | |
803 | imx_drm_device->dev = &pdev->dev; | |
804 | ||
805 | return drm_platform_init(&imx_drm_driver, pdev); | |
806 | } | |
807 | ||
808 | static int imx_drm_platform_remove(struct platform_device *pdev) | |
809 | { | |
810 | drm_platform_exit(&imx_drm_driver, pdev); | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | static struct platform_driver imx_drm_pdrv = { | |
816 | .probe = imx_drm_platform_probe, | |
99c28f10 | 817 | .remove = imx_drm_platform_remove, |
e692da4d SH |
818 | .driver = { |
819 | .owner = THIS_MODULE, | |
820 | .name = "imx-drm", | |
821 | }, | |
822 | }; | |
823 | ||
824 | static struct platform_device *imx_drm_pdev; | |
825 | ||
826 | static int __init imx_drm_init(void) | |
827 | { | |
828 | int ret; | |
829 | ||
830 | imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL); | |
831 | if (!imx_drm_device) | |
832 | return -ENOMEM; | |
833 | ||
834 | mutex_init(&imx_drm_device->mutex); | |
835 | INIT_LIST_HEAD(&imx_drm_device->crtc_list); | |
836 | INIT_LIST_HEAD(&imx_drm_device->connector_list); | |
837 | INIT_LIST_HEAD(&imx_drm_device->encoder_list); | |
838 | ||
839 | imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0); | |
840 | if (!imx_drm_pdev) { | |
841 | ret = -EINVAL; | |
842 | goto err_pdev; | |
843 | } | |
844 | ||
845 | imx_drm_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32), | |
846 | ||
847 | ret = platform_driver_register(&imx_drm_pdrv); | |
848 | if (ret) | |
849 | goto err_pdrv; | |
850 | ||
851 | return 0; | |
852 | ||
853 | err_pdrv: | |
854 | platform_device_unregister(imx_drm_pdev); | |
855 | err_pdev: | |
856 | kfree(imx_drm_device); | |
857 | ||
858 | return ret; | |
859 | } | |
860 | ||
861 | static void __exit imx_drm_exit(void) | |
862 | { | |
863 | platform_device_unregister(imx_drm_pdev); | |
864 | platform_driver_unregister(&imx_drm_pdrv); | |
865 | ||
866 | kfree(imx_drm_device); | |
867 | } | |
868 | ||
869 | module_init(imx_drm_init); | |
870 | module_exit(imx_drm_exit); | |
871 | ||
872 | MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); | |
873 | MODULE_DESCRIPTION("i.MX drm driver core"); | |
874 | MODULE_LICENSE("GPL"); |