2 * Freescale i.MX drm driver
4 * Copyright (C) 2011 Sascha Hauer, Pengutronix
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.
17 #include <linux/device.h>
18 #include <linux/platform_device.h>
20 #include <drm/drm_fb_helper.h>
21 #include <drm/drm_crtc_helper.h>
23 #include <linux/module.h>
24 #include <drm/drm_gem_cma_helper.h>
25 #include <drm/drm_fb_cma_helper.h>
34 struct list_head list;
37 struct imx_drm_device {
38 struct drm_device *drm;
40 struct list_head crtc_list;
41 struct list_head encoder_list;
42 struct list_head connector_list;
45 struct drm_fbdev_cma *fbhelper;
49 struct drm_crtc *crtc;
50 struct list_head list;
51 struct imx_drm_device *imxdrm;
53 struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs;
55 struct crtc_cookie cookie;
58 struct imx_drm_encoder {
59 struct drm_encoder *encoder;
60 struct list_head list;
62 struct list_head possible_crtcs;
65 struct imx_drm_connector {
66 struct drm_connector *connector;
67 struct list_head list;
71 int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
75 EXPORT_SYMBOL_GPL(imx_drm_crtc_id);
77 static void imx_drm_driver_lastclose(struct drm_device *drm)
79 struct imx_drm_device *imxdrm = drm->dev_private;
82 drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
85 static int imx_drm_driver_unload(struct drm_device *drm)
87 struct imx_drm_device *imxdrm = drm->dev_private;
91 drm_vblank_cleanup(imxdrm->drm);
92 drm_kms_helper_poll_fini(imxdrm->drm);
93 drm_mode_config_cleanup(imxdrm->drm);
99 * We don't care at all for crtc numbers, but the core expects the
100 * crtcs to be numbered
102 static struct imx_drm_crtc *imx_drm_crtc_by_num(struct imx_drm_device *imxdrm,
105 struct imx_drm_crtc *imx_drm_crtc;
107 list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list)
108 if (imx_drm_crtc->pipe == num)
113 int imx_drm_crtc_panel_format_pins(struct drm_crtc *crtc, u32 encoder_type,
114 u32 interface_pix_fmt, int hsync_pin, int vsync_pin)
116 struct imx_drm_device *imxdrm = crtc->dev->dev_private;
117 struct imx_drm_crtc *imx_crtc;
118 struct imx_drm_crtc_helper_funcs *helper;
120 list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list)
121 if (imx_crtc->crtc == crtc)
126 helper = &imx_crtc->imx_drm_helper_funcs;
127 if (helper->set_interface_pix_fmt)
128 return helper->set_interface_pix_fmt(crtc,
129 encoder_type, interface_pix_fmt,
130 hsync_pin, vsync_pin);
133 EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format_pins);
135 int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type,
136 u32 interface_pix_fmt)
138 return imx_drm_crtc_panel_format_pins(crtc, encoder_type,
139 interface_pix_fmt, 2, 3);
141 EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format);
143 int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
145 return drm_vblank_get(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
147 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
149 void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
151 drm_vblank_put(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
153 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
155 void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
157 drm_handle_vblank(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
159 EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
161 static int imx_drm_enable_vblank(struct drm_device *drm, int crtc)
163 struct imx_drm_device *imxdrm = drm->dev_private;
164 struct imx_drm_crtc *imx_drm_crtc;
167 imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
171 if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
174 ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
180 static void imx_drm_disable_vblank(struct drm_device *drm, int crtc)
182 struct imx_drm_device *imxdrm = drm->dev_private;
183 struct imx_drm_crtc *imx_drm_crtc;
185 imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
189 if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
192 imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
195 static void imx_drm_driver_preclose(struct drm_device *drm,
196 struct drm_file *file)
200 if (!file->is_master)
203 for (i = 0; i < MAX_CRTC; i++)
204 imx_drm_disable_vblank(drm, i);
207 static const struct file_operations imx_drm_driver_fops = {
208 .owner = THIS_MODULE,
210 .release = drm_release,
211 .unlocked_ioctl = drm_ioctl,
212 .mmap = drm_gem_cma_mmap,
215 .llseek = noop_llseek,
218 static struct imx_drm_device *imx_drm_device;
220 static struct imx_drm_device *__imx_drm_device(void)
222 return imx_drm_device;
225 struct drm_device *imx_drm_device_get(void)
227 struct imx_drm_device *imxdrm = __imx_drm_device();
228 struct imx_drm_encoder *enc;
229 struct imx_drm_connector *con;
230 struct imx_drm_crtc *crtc;
232 list_for_each_entry(enc, &imxdrm->encoder_list, list) {
233 if (!try_module_get(enc->owner)) {
234 dev_err(imxdrm->dev, "could not get module %s\n",
235 module_name(enc->owner));
240 list_for_each_entry(con, &imxdrm->connector_list, list) {
241 if (!try_module_get(con->owner)) {
242 dev_err(imxdrm->dev, "could not get module %s\n",
243 module_name(con->owner));
248 list_for_each_entry(crtc, &imxdrm->crtc_list, list) {
249 if (!try_module_get(crtc->owner)) {
250 dev_err(imxdrm->dev, "could not get module %s\n",
251 module_name(crtc->owner));
259 list_for_each_entry_continue_reverse(crtc, &imxdrm->crtc_list, list)
260 module_put(crtc->owner);
262 list_for_each_entry_continue_reverse(con, &imxdrm->connector_list, list)
263 module_put(con->owner);
265 list_for_each_entry_continue_reverse(enc, &imxdrm->encoder_list, list)
266 module_put(enc->owner);
268 mutex_unlock(&imxdrm->mutex);
273 EXPORT_SYMBOL_GPL(imx_drm_device_get);
275 void imx_drm_device_put(void)
277 struct imx_drm_device *imxdrm = __imx_drm_device();
278 struct imx_drm_encoder *enc;
279 struct imx_drm_connector *con;
280 struct imx_drm_crtc *crtc;
282 mutex_lock(&imxdrm->mutex);
284 list_for_each_entry(crtc, &imxdrm->crtc_list, list)
285 module_put(crtc->owner);
287 list_for_each_entry(con, &imxdrm->connector_list, list)
288 module_put(con->owner);
290 list_for_each_entry(enc, &imxdrm->encoder_list, list)
291 module_put(enc->owner);
293 mutex_unlock(&imxdrm->mutex);
295 EXPORT_SYMBOL_GPL(imx_drm_device_put);
297 static int drm_mode_group_reinit(struct drm_device *dev)
299 struct drm_mode_group *group = &dev->primary->mode_group;
300 uint32_t *id_list = group->id_list;
303 ret = drm_mode_group_init_legacy_group(dev, group);
312 * register an encoder to the drm core
314 static int imx_drm_encoder_register(struct imx_drm_encoder *imx_drm_encoder)
316 struct imx_drm_device *imxdrm = __imx_drm_device();
318 INIT_LIST_HEAD(&imx_drm_encoder->possible_crtcs);
320 drm_encoder_init(imxdrm->drm, imx_drm_encoder->encoder,
321 imx_drm_encoder->encoder->funcs,
322 imx_drm_encoder->encoder->encoder_type);
324 drm_mode_group_reinit(imxdrm->drm);
330 * unregister an encoder from the drm core
332 static void imx_drm_encoder_unregister(struct imx_drm_encoder
335 struct imx_drm_device *imxdrm = __imx_drm_device();
337 drm_encoder_cleanup(imx_drm_encoder->encoder);
339 drm_mode_group_reinit(imxdrm->drm);
343 * register a connector to the drm core
345 static int imx_drm_connector_register(
346 struct imx_drm_connector *imx_drm_connector)
348 struct imx_drm_device *imxdrm = __imx_drm_device();
350 drm_connector_init(imxdrm->drm, imx_drm_connector->connector,
351 imx_drm_connector->connector->funcs,
352 imx_drm_connector->connector->connector_type);
353 drm_mode_group_reinit(imxdrm->drm);
355 return drm_sysfs_connector_add(imx_drm_connector->connector);
359 * unregister a connector from the drm core
361 static void imx_drm_connector_unregister(
362 struct imx_drm_connector *imx_drm_connector)
364 struct imx_drm_device *imxdrm = __imx_drm_device();
366 drm_sysfs_connector_remove(imx_drm_connector->connector);
367 drm_connector_cleanup(imx_drm_connector->connector);
369 drm_mode_group_reinit(imxdrm->drm);
373 * register a crtc to the drm core
375 static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc)
377 struct imx_drm_device *imxdrm = __imx_drm_device();
380 ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
384 drm_crtc_helper_add(imx_drm_crtc->crtc,
385 imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
387 drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc,
388 imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
390 drm_mode_group_reinit(imxdrm->drm);
396 * Called by the CRTC driver when all CRTCs are registered. This
397 * puts all the pieces together and initializes the driver.
398 * Once this is called no more CRTCs can be registered since
399 * the drm core has hardcoded the number of crtcs in several
402 static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
404 struct imx_drm_device *imxdrm = __imx_drm_device();
409 drm->dev_private = imxdrm;
412 * enable drm irq mode.
413 * - with irq_enabled = true, we can use the vblank feature.
415 * P.S. note that we wouldn't use drm irq handler but
416 * just specific driver own one instead because
417 * drm framework supports only one irq handler and
418 * drivers can well take care of their interrupts
420 drm->irq_enabled = true;
422 drm_mode_config_init(drm);
423 imx_drm_mode_config_init(drm);
425 mutex_lock(&imxdrm->mutex);
427 drm_kms_helper_poll_init(imxdrm->drm);
429 /* setup the grouping for the legacy output */
430 ret = drm_mode_group_init_legacy_group(imxdrm->drm,
431 &imxdrm->drm->primary->mode_group);
435 ret = drm_vblank_init(imxdrm->drm, MAX_CRTC);
440 * with vblank_disable_allowed = true, vblank interrupt will be disabled
441 * by drm timer once a current process gives up ownership of
442 * vblank event.(after drm_vblank_put function is called)
444 imxdrm->drm->vblank_disable_allowed = true;
446 if (!imx_drm_device_get()) {
451 platform_set_drvdata(drm->platformdev, drm);
452 mutex_unlock(&imxdrm->mutex);
456 drm_vblank_cleanup(drm);
458 drm_kms_helper_poll_fini(drm);
459 drm_mode_config_cleanup(drm);
460 mutex_unlock(&imxdrm->mutex);
465 static void imx_drm_update_possible_crtcs(void)
467 struct imx_drm_device *imxdrm = __imx_drm_device();
468 struct imx_drm_crtc *imx_drm_crtc;
469 struct imx_drm_encoder *enc;
470 struct crtc_cookie *cookie;
472 list_for_each_entry(enc, &imxdrm->encoder_list, list) {
473 u32 possible_crtcs = 0;
475 list_for_each_entry(cookie, &enc->possible_crtcs, list) {
476 list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) {
477 if (imx_drm_crtc->cookie.cookie == cookie->cookie &&
478 imx_drm_crtc->cookie.id == cookie->id) {
479 possible_crtcs |= 1 << imx_drm_crtc->pipe;
483 enc->encoder->possible_crtcs = possible_crtcs;
484 enc->encoder->possible_clones = possible_crtcs;
489 * imx_drm_add_crtc - add a new crtc
491 * The return value if !NULL is a cookie for the caller to pass to
492 * imx_drm_remove_crtc later.
494 int imx_drm_add_crtc(struct drm_crtc *crtc,
495 struct imx_drm_crtc **new_crtc,
496 const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
497 struct module *owner, void *cookie, int id)
499 struct imx_drm_device *imxdrm = __imx_drm_device();
500 struct imx_drm_crtc *imx_drm_crtc;
503 mutex_lock(&imxdrm->mutex);
506 * The vblank arrays are dimensioned by MAX_CRTC - we can't
507 * pass IDs greater than this to those functions.
509 if (imxdrm->pipes >= MAX_CRTC) {
514 if (imxdrm->drm->open_count) {
519 imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
525 imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
526 imx_drm_crtc->pipe = imxdrm->pipes++;
527 imx_drm_crtc->cookie.cookie = cookie;
528 imx_drm_crtc->cookie.id = id;
530 imx_drm_crtc->crtc = crtc;
531 imx_drm_crtc->imxdrm = imxdrm;
533 imx_drm_crtc->owner = owner;
535 list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list);
537 *new_crtc = imx_drm_crtc;
539 ret = imx_drm_crtc_register(imx_drm_crtc);
543 imx_drm_update_possible_crtcs();
545 mutex_unlock(&imxdrm->mutex);
550 list_del(&imx_drm_crtc->list);
554 mutex_unlock(&imxdrm->mutex);
557 EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
560 * imx_drm_remove_crtc - remove a crtc
562 int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
564 struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm;
566 mutex_lock(&imxdrm->mutex);
568 drm_crtc_cleanup(imx_drm_crtc->crtc);
570 list_del(&imx_drm_crtc->list);
572 drm_mode_group_reinit(imxdrm->drm);
574 mutex_unlock(&imxdrm->mutex);
580 EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
583 * imx_drm_add_encoder - add a new encoder
585 int imx_drm_add_encoder(struct drm_encoder *encoder,
586 struct imx_drm_encoder **newenc, struct module *owner)
588 struct imx_drm_device *imxdrm = __imx_drm_device();
589 struct imx_drm_encoder *imx_drm_encoder;
592 mutex_lock(&imxdrm->mutex);
594 if (imxdrm->drm->open_count) {
599 imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL);
600 if (!imx_drm_encoder) {
605 imx_drm_encoder->encoder = encoder;
606 imx_drm_encoder->owner = owner;
608 ret = imx_drm_encoder_register(imx_drm_encoder);
614 list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list);
616 *newenc = imx_drm_encoder;
618 mutex_unlock(&imxdrm->mutex);
623 kfree(imx_drm_encoder);
626 mutex_unlock(&imxdrm->mutex);
630 EXPORT_SYMBOL_GPL(imx_drm_add_encoder);
632 int imx_drm_encoder_add_possible_crtcs(
633 struct imx_drm_encoder *imx_drm_encoder,
634 struct device_node *np)
636 struct imx_drm_device *imxdrm = __imx_drm_device();
637 struct of_phandle_args args;
638 struct crtc_cookie *c;
642 if (!list_empty(&imx_drm_encoder->possible_crtcs))
645 for (i = 0; !ret; i++) {
646 ret = of_parse_phandle_with_args(np, "crtcs",
647 "#crtc-cells", i, &args);
651 c = kzalloc(sizeof(*c), GFP_KERNEL);
653 of_node_put(args.np);
658 c->id = args.args_count > 0 ? args.args[0] : 0;
660 of_node_put(args.np);
662 mutex_lock(&imxdrm->mutex);
664 list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs);
666 mutex_unlock(&imxdrm->mutex);
669 imx_drm_update_possible_crtcs();
673 EXPORT_SYMBOL_GPL(imx_drm_encoder_add_possible_crtcs);
675 int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder,
676 struct drm_crtc *crtc)
678 struct imx_drm_device *imxdrm = __imx_drm_device();
679 struct imx_drm_crtc *imx_crtc;
682 list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) {
683 if (imx_crtc->crtc == crtc)
692 EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);
695 * imx_drm_remove_encoder - remove an encoder
697 int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder)
699 struct imx_drm_device *imxdrm = __imx_drm_device();
700 struct crtc_cookie *c, *tmp;
702 mutex_lock(&imxdrm->mutex);
704 imx_drm_encoder_unregister(imx_drm_encoder);
706 list_del(&imx_drm_encoder->list);
708 list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs,
712 mutex_unlock(&imxdrm->mutex);
714 kfree(imx_drm_encoder);
718 EXPORT_SYMBOL_GPL(imx_drm_remove_encoder);
721 * imx_drm_add_connector - add a connector
723 int imx_drm_add_connector(struct drm_connector *connector,
724 struct imx_drm_connector **new_con,
725 struct module *owner)
727 struct imx_drm_device *imxdrm = __imx_drm_device();
728 struct imx_drm_connector *imx_drm_connector;
731 mutex_lock(&imxdrm->mutex);
733 if (imxdrm->drm->open_count) {
738 imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL);
739 if (!imx_drm_connector) {
744 imx_drm_connector->connector = connector;
745 imx_drm_connector->owner = owner;
747 ret = imx_drm_connector_register(imx_drm_connector);
751 list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list);
753 *new_con = imx_drm_connector;
755 mutex_unlock(&imxdrm->mutex);
760 kfree(imx_drm_connector);
763 mutex_unlock(&imxdrm->mutex);
767 EXPORT_SYMBOL_GPL(imx_drm_add_connector);
769 void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper)
771 struct imx_drm_device *imxdrm = __imx_drm_device();
773 imxdrm->fbhelper = fbdev_helper;
775 EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set);
778 * imx_drm_remove_connector - remove a connector
780 int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector)
782 struct imx_drm_device *imxdrm = __imx_drm_device();
784 mutex_lock(&imxdrm->mutex);
786 imx_drm_connector_unregister(imx_drm_connector);
788 list_del(&imx_drm_connector->list);
790 mutex_unlock(&imxdrm->mutex);
792 kfree(imx_drm_connector);
796 EXPORT_SYMBOL_GPL(imx_drm_remove_connector);
798 static const struct drm_ioctl_desc imx_drm_ioctls[] = {
802 static struct drm_driver imx_drm_driver = {
803 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
804 .load = imx_drm_driver_load,
805 .unload = imx_drm_driver_unload,
806 .lastclose = imx_drm_driver_lastclose,
807 .preclose = imx_drm_driver_preclose,
808 .gem_free_object = drm_gem_cma_free_object,
809 .gem_vm_ops = &drm_gem_cma_vm_ops,
810 .dumb_create = drm_gem_cma_dumb_create,
811 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
812 .dumb_destroy = drm_gem_dumb_destroy,
814 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
815 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
816 .gem_prime_import = drm_gem_prime_import,
817 .gem_prime_export = drm_gem_prime_export,
818 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
819 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
820 .gem_prime_vmap = drm_gem_cma_prime_vmap,
821 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
822 .gem_prime_mmap = drm_gem_cma_prime_mmap,
823 .get_vblank_counter = drm_vblank_count,
824 .enable_vblank = imx_drm_enable_vblank,
825 .disable_vblank = imx_drm_disable_vblank,
826 .ioctls = imx_drm_ioctls,
827 .num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
828 .fops = &imx_drm_driver_fops,
830 .desc = "i.MX DRM graphics",
837 static int imx_drm_platform_probe(struct platform_device *pdev)
841 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
845 imx_drm_device->dev = &pdev->dev;
847 return drm_platform_init(&imx_drm_driver, pdev);
850 static int imx_drm_platform_remove(struct platform_device *pdev)
852 drm_put_dev(platform_get_drvdata(pdev));
857 static struct platform_driver imx_drm_pdrv = {
858 .probe = imx_drm_platform_probe,
859 .remove = imx_drm_platform_remove,
861 .owner = THIS_MODULE,
866 static struct platform_device *imx_drm_pdev;
868 static int __init imx_drm_init(void)
872 imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL);
876 mutex_init(&imx_drm_device->mutex);
877 INIT_LIST_HEAD(&imx_drm_device->crtc_list);
878 INIT_LIST_HEAD(&imx_drm_device->connector_list);
879 INIT_LIST_HEAD(&imx_drm_device->encoder_list);
881 imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0);
882 if (IS_ERR(imx_drm_pdev)) {
883 ret = PTR_ERR(imx_drm_pdev);
887 ret = platform_driver_register(&imx_drm_pdrv);
894 platform_device_unregister(imx_drm_pdev);
896 kfree(imx_drm_device);
901 static void __exit imx_drm_exit(void)
903 platform_device_unregister(imx_drm_pdev);
904 platform_driver_unregister(&imx_drm_pdrv);
906 kfree(imx_drm_device);
909 module_init(imx_drm_init);
910 module_exit(imx_drm_exit);
912 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
913 MODULE_DESCRIPTION("i.MX drm driver core");
914 MODULE_LICENSE("GPL");