Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/gpu/drm/omapdrm/omap_drv.c

  1 /*
  2  * drivers/gpu/drm/omapdrm/omap_drv.c
  3  *
  4  * Copyright (C) 2011 Texas Instruments
  5  * Author: Rob Clark <rob@ti.com>
  6  *
  7  * This program is free software; you can redistribute it and/or modify it
  8  * under the terms of the GNU General Public License version 2 as published by
  9  * the Free Software Foundation.
 10  *
 11  * This program is distributed in the hope that it will be useful, but WITHOUT
 12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 14  * more details.
 15  *
 16  * You should have received a copy of the GNU General Public License along with
 17  * this program.  If not, see <http://www.gnu.org/licenses/>.
 18  */
 19 
 20 #include "omap_drv.h"
 21 
 22 #include "drm_crtc_helper.h"
 23 #include "drm_fb_helper.h"
 24 #include "omap_dmm_tiler.h"
 25 
 26 #define DRIVER_NAME             MODULE_NAME
 27 #define DRIVER_DESC             "OMAP DRM"
 28 #define DRIVER_DATE             "20110917"
 29 #define DRIVER_MAJOR            1
 30 #define DRIVER_MINOR            0
 31 #define DRIVER_PATCHLEVEL       0
 32 
 33 static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS;
 34 
 35 MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs");
 36 module_param(num_crtc, int, 0600);
 37 
 38 /*
 39  * mode config funcs
 40  */
 41 
 42 /* Notes about mapping DSS and DRM entities:
 43  *    CRTC:        overlay
 44  *    encoder:     manager.. with some extension to allow one primary CRTC
 45  *                 and zero or more video CRTC's to be mapped to one encoder?
 46  *    connector:   dssdev.. manager can be attached/detached from different
 47  *                 devices
 48  */
 49 
 50 static void omap_fb_output_poll_changed(struct drm_device *dev)
 51 {
 52         struct omap_drm_private *priv = dev->dev_private;
 53         DBG("dev=%p", dev);
 54         if (priv->fbdev)
 55                 drm_fb_helper_hotplug_event(priv->fbdev);
 56 }
 57 
 58 static const struct drm_mode_config_funcs omap_mode_config_funcs = {
 59         .fb_create = omap_framebuffer_create,
 60         .output_poll_changed = omap_fb_output_poll_changed,
 61 };
 62 
 63 static int get_connector_type(struct omap_dss_device *dssdev)
 64 {
 65         switch (dssdev->type) {
 66         case OMAP_DISPLAY_TYPE_HDMI:
 67                 return DRM_MODE_CONNECTOR_HDMIA;
 68         case OMAP_DISPLAY_TYPE_DVI:
 69                 return DRM_MODE_CONNECTOR_DVID;
 70         default:
 71                 return DRM_MODE_CONNECTOR_Unknown;
 72         }
 73 }
 74 
 75 static bool channel_used(struct drm_device *dev, enum omap_channel channel)
 76 {
 77         struct omap_drm_private *priv = dev->dev_private;
 78         int i;
 79 
 80         for (i = 0; i < priv->num_crtcs; i++) {
 81                 struct drm_crtc *crtc = priv->crtcs[i];
 82 
 83                 if (omap_crtc_channel(crtc) == channel)
 84                         return true;
 85         }
 86 
 87         return false;
 88 }
 89 static void omap_disconnect_dssdevs(void)
 90 {
 91         struct omap_dss_device *dssdev = NULL;
 92 
 93         for_each_dss_dev(dssdev)
 94                 dssdev->driver->disconnect(dssdev);
 95 }
 96 
 97 static int omap_connect_dssdevs(void)
 98 {
 99         int r;
100         struct omap_dss_device *dssdev = NULL;
101         bool no_displays = true;
102 
103         for_each_dss_dev(dssdev) {
104                 r = dssdev->driver->connect(dssdev);
105                 if (r == -EPROBE_DEFER) {
106                         omap_dss_put_device(dssdev);
107                         goto cleanup;
108                 } else if (r) {
109                         dev_warn(dssdev->dev, "could not connect display: %s\n",
110                                 dssdev->name);
111                 } else {
112                         no_displays = false;
113                 }
114         }
115 
116         if (no_displays)
117                 return -EPROBE_DEFER;
118 
119         return 0;
120 
121 cleanup:
122         /*
123          * if we are deferring probe, we disconnect the devices we previously
124          * connected
125          */
126         omap_disconnect_dssdevs();
127 
128         return r;
129 }
130 
131 static int omap_modeset_init(struct drm_device *dev)
132 {
133         struct omap_drm_private *priv = dev->dev_private;
134         struct omap_dss_device *dssdev = NULL;
135         int num_ovls = dss_feat_get_num_ovls();
136         int num_mgrs = dss_feat_get_num_mgrs();
137         int num_crtcs;
138         int i, id = 0;
139 
140         drm_mode_config_init(dev);
141 
142         omap_drm_irq_install(dev);
143 
144         /*
145          * We usually don't want to create a CRTC for each manager, at least
146          * not until we have a way to expose private planes to userspace.
147          * Otherwise there would not be enough video pipes left for drm planes.
148          * We use the num_crtc argument to limit the number of crtcs we create.
149          */
150         num_crtcs = min3(num_crtc, num_mgrs, num_ovls);
151 
152         dssdev = NULL;
153 
154         for_each_dss_dev(dssdev) {
155                 struct drm_connector *connector;
156                 struct drm_encoder *encoder;
157                 enum omap_channel channel;
158                 struct omap_overlay_manager *mgr;
159 
160                 if (!omapdss_device_is_connected(dssdev))
161                         continue;
162 
163                 encoder = omap_encoder_init(dev, dssdev);
164 
165                 if (!encoder) {
166                         dev_err(dev->dev, "could not create encoder: %s\n",
167                                         dssdev->name);
168                         return -ENOMEM;
169                 }
170 
171                 connector = omap_connector_init(dev,
172                                 get_connector_type(dssdev), dssdev, encoder);
173 
174                 if (!connector) {
175                         dev_err(dev->dev, "could not create connector: %s\n",
176                                         dssdev->name);
177                         return -ENOMEM;
178                 }
179 
180                 BUG_ON(priv->num_encoders >= ARRAY_SIZE(priv->encoders));
181                 BUG_ON(priv->num_connectors >= ARRAY_SIZE(priv->connectors));
182 
183                 priv->encoders[priv->num_encoders++] = encoder;
184                 priv->connectors[priv->num_connectors++] = connector;
185 
186                 drm_mode_connector_attach_encoder(connector, encoder);
187 
188                 /*
189                  * if we have reached the limit of the crtcs we are allowed to
190                  * create, let's not try to look for a crtc for this
191                  * panel/encoder and onwards, we will, of course, populate the
192                  * the possible_crtcs field for all the encoders with the final
193                  * set of crtcs we create
194                  */
195                 if (id == num_crtcs)
196                         continue;
197 
198                 /*
199                  * get the recommended DISPC channel for this encoder. For now,
200                  * we only try to get create a crtc out of the recommended, the
201                  * other possible channels to which the encoder can connect are
202                  * not considered.
203                  */
204 
205                 mgr = omapdss_find_mgr_from_display(dssdev);
206                 channel = mgr->id;
207                 /*
208                  * if this channel hasn't already been taken by a previously
209                  * allocated crtc, we create a new crtc for it
210                  */
211                 if (!channel_used(dev, channel)) {
212                         struct drm_plane *plane;
213                         struct drm_crtc *crtc;
214 
215                         plane = omap_plane_init(dev, id, true);
216                         crtc = omap_crtc_init(dev, plane, channel, id);
217 
218                         BUG_ON(priv->num_crtcs >= ARRAY_SIZE(priv->crtcs));
219                         priv->crtcs[id] = crtc;
220                         priv->num_crtcs++;
221 
222                         priv->planes[id] = plane;
223                         priv->num_planes++;
224 
225                         id++;
226                 }
227         }
228 
229         /*
230          * we have allocated crtcs according to the need of the panels/encoders,
231          * adding more crtcs here if needed
232          */
233         for (; id < num_crtcs; id++) {
234 
235                 /* find a free manager for this crtc */
236                 for (i = 0; i < num_mgrs; i++) {
237                         if (!channel_used(dev, i)) {
238                                 struct drm_plane *plane;
239                                 struct drm_crtc *crtc;
240 
241                                 plane = omap_plane_init(dev, id, true);
242                                 crtc = omap_crtc_init(dev, plane, i, id);
243 
244                                 BUG_ON(priv->num_crtcs >=
245                                         ARRAY_SIZE(priv->crtcs));
246 
247                                 priv->crtcs[id] = crtc;
248                                 priv->num_crtcs++;
249 
250                                 priv->planes[id] = plane;
251                                 priv->num_planes++;
252 
253                                 break;
254                         } else {
255                                 continue;
256                         }
257                 }
258 
259                 if (i == num_mgrs) {
260                         /* this shouldn't really happen */
261                         dev_err(dev->dev, "no managers left for crtc\n");
262                         return -ENOMEM;
263                 }
264         }
265 
266         /*
267          * Create normal planes for the remaining overlays:
268          */
269         for (; id < num_ovls; id++) {
270                 struct drm_plane *plane = omap_plane_init(dev, id, false);
271 
272                 BUG_ON(priv->num_planes >= ARRAY_SIZE(priv->planes));
273                 priv->planes[priv->num_planes++] = plane;
274         }
275 
276         for (i = 0; i < priv->num_encoders; i++) {
277                 struct drm_encoder *encoder = priv->encoders[i];
278                 struct omap_dss_device *dssdev =
279                                         omap_encoder_get_dssdev(encoder);
280                 struct omap_dss_device *output;
281 
282                 output = omapdss_find_output_from_display(dssdev);
283 
284                 /* figure out which crtc's we can connect the encoder to: */
285                 encoder->possible_crtcs = 0;
286                 for (id = 0; id < priv->num_crtcs; id++) {
287                         struct drm_crtc *crtc = priv->crtcs[id];
288                         enum omap_channel crtc_channel;
289                         enum omap_dss_output_id supported_outputs;
290 
291                         crtc_channel = omap_crtc_channel(crtc);
292                         supported_outputs =
293                                 dss_feat_get_supported_outputs(crtc_channel);
294 
295                         if (supported_outputs & output->id)
296                                 encoder->possible_crtcs |= (1 << id);
297                 }
298 
299                 omap_dss_put_device(output);
300         }
301 
302         DBG("registered %d planes, %d crtcs, %d encoders and %d connectors\n",
303                 priv->num_planes, priv->num_crtcs, priv->num_encoders,
304                 priv->num_connectors);
305 
306         dev->mode_config.min_width = 32;
307         dev->mode_config.min_height = 32;
308 
309         /* note: eventually will need some cpu_is_omapXYZ() type stuff here
310          * to fill in these limits properly on different OMAP generations..
311          */
312         dev->mode_config.max_width = 2048;
313         dev->mode_config.max_height = 2048;
314 
315         dev->mode_config.funcs = &omap_mode_config_funcs;
316 
317         return 0;
318 }
319 
320 static void omap_modeset_free(struct drm_device *dev)
321 {
322         drm_mode_config_cleanup(dev);
323 }
324 
325 /*
326  * drm ioctl funcs
327  */
328 
329 
330 static int ioctl_get_param(struct drm_device *dev, void *data,
331                 struct drm_file *file_priv)
332 {
333         struct omap_drm_private *priv = dev->dev_private;
334         struct drm_omap_param *args = data;
335 
336         DBG("%p: param=%llu", dev, args->param);
337 
338         switch (args->param) {
339         case OMAP_PARAM_CHIPSET_ID:
340                 args->value = priv->omaprev;
341                 break;
342         default:
343                 DBG("unknown parameter %lld", args->param);
344                 return -EINVAL;
345         }
346 
347         return 0;
348 }
349 
350 static int ioctl_set_param(struct drm_device *dev, void *data,
351                 struct drm_file *file_priv)
352 {
353         struct drm_omap_param *args = data;
354 
355         switch (args->param) {
356         default:
357                 DBG("unknown parameter %lld", args->param);
358                 return -EINVAL;
359         }
360 
361         return 0;
362 }
363 
364 static int ioctl_gem_new(struct drm_device *dev, void *data,
365                 struct drm_file *file_priv)
366 {
367         struct drm_omap_gem_new *args = data;
368         VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
369                         args->size.bytes, args->flags);
370         return omap_gem_new_handle(dev, file_priv, args->size,
371                         args->flags, &args->handle);
372 }
373 
374 static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
375                 struct drm_file *file_priv)
376 {
377         struct drm_omap_gem_cpu_prep *args = data;
378         struct drm_gem_object *obj;
379         int ret;
380 
381         VERB("%p:%p: handle=%d, op=%x", dev, file_priv, args->handle, args->op);
382 
383         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
384         if (!obj)
385                 return -ENOENT;
386 
387         ret = omap_gem_op_sync(obj, args->op);
388 
389         if (!ret)
390                 ret = omap_gem_op_start(obj, args->op);
391 
392         drm_gem_object_unreference_unlocked(obj);
393 
394         return ret;
395 }
396 
397 static int ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
398                 struct drm_file *file_priv)
399 {
400         struct drm_omap_gem_cpu_fini *args = data;
401         struct drm_gem_object *obj;
402         int ret;
403 
404         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
405 
406         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
407         if (!obj)
408                 return -ENOENT;
409 
410         /* XXX flushy, flushy */
411         ret = 0;
412 
413         if (!ret)
414                 ret = omap_gem_op_finish(obj, args->op);
415 
416         drm_gem_object_unreference_unlocked(obj);
417 
418         return ret;
419 }
420 
421 static int ioctl_gem_info(struct drm_device *dev, void *data,
422                 struct drm_file *file_priv)
423 {
424         struct drm_omap_gem_info *args = data;
425         struct drm_gem_object *obj;
426         int ret = 0;
427 
428         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
429 
430         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
431         if (!obj)
432                 return -ENOENT;
433 
434         args->size = omap_gem_mmap_size(obj);
435         args->offset = omap_gem_mmap_offset(obj);
436 
437         drm_gem_object_unreference_unlocked(obj);
438 
439         return ret;
440 }
441 
442 static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
443         DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_UNLOCKED|DRM_AUTH),
444         DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_UNLOCKED|DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
445         DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_UNLOCKED|DRM_AUTH),
446         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_UNLOCKED|DRM_AUTH),
447         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_UNLOCKED|DRM_AUTH),
448         DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_UNLOCKED|DRM_AUTH),
449 };
450 
451 /*
452  * drm driver funcs
453  */
454 
455 /**
456  * load - setup chip and create an initial config
457  * @dev: DRM device
458  * @flags: startup flags
459  *
460  * The driver load routine has to do several things:
461  *   - initialize the memory manager
462  *   - allocate initial config memory
463  *   - setup the DRM framebuffer with the allocated memory
464  */
465 static int dev_load(struct drm_device *dev, unsigned long flags)
466 {
467         struct omap_drm_platform_data *pdata = dev->dev->platform_data;
468         struct omap_drm_private *priv;
469         int ret;
470 
471         DBG("load: dev=%p", dev);
472 
473         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
474         if (!priv)
475                 return -ENOMEM;
476 
477         priv->omaprev = pdata->omaprev;
478 
479         dev->dev_private = priv;
480 
481         priv->wq = alloc_ordered_workqueue("omapdrm", 0);
482 
483         INIT_LIST_HEAD(&priv->obj_list);
484 
485         omap_gem_init(dev);
486 
487         ret = omap_modeset_init(dev);
488         if (ret) {
489                 dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret);
490                 dev->dev_private = NULL;
491                 kfree(priv);
492                 return ret;
493         }
494 
495         ret = drm_vblank_init(dev, priv->num_crtcs);
496         if (ret)
497                 dev_warn(dev->dev, "could not init vblank\n");
498 
499         priv->fbdev = omap_fbdev_init(dev);
500         if (!priv->fbdev) {
501                 dev_warn(dev->dev, "omap_fbdev_init failed\n");
502                 /* well, limp along without an fbdev.. maybe X11 will work? */
503         }
504 
505         /* store off drm_device for use in pm ops */
506         dev_set_drvdata(dev->dev, dev);
507 
508         drm_kms_helper_poll_init(dev);
509 
510         return 0;
511 }
512 
513 static int dev_unload(struct drm_device *dev)
514 {
515         struct omap_drm_private *priv = dev->dev_private;
516         int i;
517 
518         DBG("unload: dev=%p", dev);
519 
520         drm_kms_helper_poll_fini(dev);
521 
522         omap_fbdev_free(dev);
523 
524         /* flush crtcs so the fbs get released */
525         for (i = 0; i < priv->num_crtcs; i++)
526                 omap_crtc_flush(priv->crtcs[i]);
527 
528         omap_modeset_free(dev);
529         omap_gem_deinit(dev);
530 
531         destroy_workqueue(priv->wq);
532 
533         drm_vblank_cleanup(dev);
534         omap_drm_irq_uninstall(dev);
535 
536         kfree(dev->dev_private);
537         dev->dev_private = NULL;
538 
539         dev_set_drvdata(dev->dev, NULL);
540 
541         return 0;
542 }
543 
544 static int dev_open(struct drm_device *dev, struct drm_file *file)
545 {
546         file->driver_priv = NULL;
547 
548         DBG("open: dev=%p, file=%p", dev, file);
549 
550         return 0;
551 }
552 
553 /**
554  * lastclose - clean up after all DRM clients have exited
555  * @dev: DRM device
556  *
557  * Take care of cleaning up after all DRM clients have exited.  In the
558  * mode setting case, we want to restore the kernel's initial mode (just
559  * in case the last client left us in a bad state).
560  */
561 static void dev_lastclose(struct drm_device *dev)
562 {
563         int i;
564 
565         /* we don't support vga-switcheroo.. so just make sure the fbdev
566          * mode is active
567          */
568         struct omap_drm_private *priv = dev->dev_private;
569         int ret;
570 
571         DBG("lastclose: dev=%p", dev);
572 
573         if (priv->rotation_prop) {
574                 /* need to restore default rotation state.. not sure
575                  * if there is a cleaner way to restore properties to
576                  * default state?  Maybe a flag that properties should
577                  * automatically be restored to default state on
578                  * lastclose?
579                  */
580                 for (i = 0; i < priv->num_crtcs; i++) {
581                         drm_object_property_set_value(&priv->crtcs[i]->base,
582                                         priv->rotation_prop, 0);
583                 }
584 
585                 for (i = 0; i < priv->num_planes; i++) {
586                         drm_object_property_set_value(&priv->planes[i]->base,
587                                         priv->rotation_prop, 0);
588                 }
589         }
590 
591         ret = drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
592         if (ret)
593                 DBG("failed to restore crtc mode");
594 }
595 
596 static void dev_preclose(struct drm_device *dev, struct drm_file *file)
597 {
598         DBG("preclose: dev=%p", dev);
599 }
600 
601 static void dev_postclose(struct drm_device *dev, struct drm_file *file)
602 {
603         DBG("postclose: dev=%p, file=%p", dev, file);
604 }
605 
606 static const struct vm_operations_struct omap_gem_vm_ops = {
607         .fault = omap_gem_fault,
608         .open = drm_gem_vm_open,
609         .close = drm_gem_vm_close,
610 };
611 
612 static const struct file_operations omapdriver_fops = {
613                 .owner = THIS_MODULE,
614                 .open = drm_open,
615                 .unlocked_ioctl = drm_ioctl,
616                 .release = drm_release,
617                 .mmap = omap_gem_mmap,
618                 .poll = drm_poll,
619                 .read = drm_read,
620                 .llseek = noop_llseek,
621 };
622 
623 static struct drm_driver omap_drm_driver = {
624                 .driver_features =
625                                 DRIVER_HAVE_IRQ | DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
626                 .load = dev_load,
627                 .unload = dev_unload,
628                 .open = dev_open,
629                 .lastclose = dev_lastclose,
630                 .preclose = dev_preclose,
631                 .postclose = dev_postclose,
632                 .set_busid = drm_platform_set_busid,
633                 .get_vblank_counter = drm_vblank_count,
634                 .enable_vblank = omap_irq_enable_vblank,
635                 .disable_vblank = omap_irq_disable_vblank,
636                 .irq_preinstall = omap_irq_preinstall,
637                 .irq_postinstall = omap_irq_postinstall,
638                 .irq_uninstall = omap_irq_uninstall,
639                 .irq_handler = omap_irq_handler,
640 #ifdef CONFIG_DEBUG_FS
641                 .debugfs_init = omap_debugfs_init,
642                 .debugfs_cleanup = omap_debugfs_cleanup,
643 #endif
644                 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
645                 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
646                 .gem_prime_export = omap_gem_prime_export,
647                 .gem_prime_import = omap_gem_prime_import,
648                 .gem_free_object = omap_gem_free_object,
649                 .gem_vm_ops = &omap_gem_vm_ops,
650                 .dumb_create = omap_gem_dumb_create,
651                 .dumb_map_offset = omap_gem_dumb_map_offset,
652                 .dumb_destroy = drm_gem_dumb_destroy,
653                 .ioctls = ioctls,
654                 .num_ioctls = DRM_OMAP_NUM_IOCTLS,
655                 .fops = &omapdriver_fops,
656                 .name = DRIVER_NAME,
657                 .desc = DRIVER_DESC,
658                 .date = DRIVER_DATE,
659                 .major = DRIVER_MAJOR,
660                 .minor = DRIVER_MINOR,
661                 .patchlevel = DRIVER_PATCHLEVEL,
662 };
663 
664 static int pdev_suspend(struct platform_device *pDevice, pm_message_t state)
665 {
666         DBG("");
667         return 0;
668 }
669 
670 static int pdev_resume(struct platform_device *device)
671 {
672         DBG("");
673         return 0;
674 }
675 
676 static void pdev_shutdown(struct platform_device *device)
677 {
678         DBG("");
679 }
680 
681 static int pdev_probe(struct platform_device *device)
682 {
683         int r;
684 
685         if (omapdss_is_initialized() == false)
686                 return -EPROBE_DEFER;
687 
688         omap_crtc_pre_init();
689 
690         r = omap_connect_dssdevs();
691         if (r) {
692                 omap_crtc_pre_uninit();
693                 return r;
694         }
695 
696         DBG("%s", device->name);
697         return drm_platform_init(&omap_drm_driver, device);
698 }
699 
700 static int pdev_remove(struct platform_device *device)
701 {
702         DBG("");
703 
704         drm_put_dev(platform_get_drvdata(device));
705 
706         omap_disconnect_dssdevs();
707         omap_crtc_pre_uninit();
708 
709         return 0;
710 }
711 
712 #ifdef CONFIG_PM
713 static const struct dev_pm_ops omapdrm_pm_ops = {
714         .resume = omap_gem_resume,
715 };
716 #endif
717 
718 static struct platform_driver pdev = {
719                 .driver = {
720                         .name = DRIVER_NAME,
721                         .owner = THIS_MODULE,
722 #ifdef CONFIG_PM
723                         .pm = &omapdrm_pm_ops,
724 #endif
725                 },
726                 .probe = pdev_probe,
727                 .remove = pdev_remove,
728                 .suspend = pdev_suspend,
729                 .resume = pdev_resume,
730                 .shutdown = pdev_shutdown,
731 };
732 
733 static int __init omap_drm_init(void)
734 {
735         int r;
736 
737         DBG("init");
738 
739         r = platform_driver_register(&omap_dmm_driver);
740         if (r) {
741                 pr_err("DMM driver registration failed\n");
742                 return r;
743         }
744 
745         r = platform_driver_register(&pdev);
746         if (r) {
747                 pr_err("omapdrm driver registration failed\n");
748                 platform_driver_unregister(&omap_dmm_driver);
749                 return r;
750         }
751 
752         return 0;
753 }
754 
755 static void __exit omap_drm_fini(void)
756 {
757         DBG("fini");
758 
759         platform_driver_unregister(&pdev);
760 
761         platform_driver_unregister(&omap_dmm_driver);
762 }
763 
764 /* need late_initcall() so we load after dss_driver's are loaded */
765 late_initcall(omap_drm_init);
766 module_exit(omap_drm_fini);
767 
768 MODULE_AUTHOR("Rob Clark <rob@ti.com>");
769 MODULE_DESCRIPTION("OMAP DRM Display Driver");
770 MODULE_ALIAS("platform:" DRIVER_NAME);
771 MODULE_LICENSE("GPL v2");
772 

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