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)
76 static void imx_drm_driver_lastclose(struct drm_device *drm)
78 struct imx_drm_device *imxdrm = drm->dev_private;
81 drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
84 static int imx_drm_driver_unload(struct drm_device *drm)
86 struct imx_drm_device *imxdrm = drm->dev_private;
90 drm_mode_config_cleanup(imxdrm->drm);
91 drm_kms_helper_poll_fini(imxdrm->drm);
97 * We don't care at all for crtc numbers, but the core expects the
98 * crtcs to be numbered
100 static struct imx_drm_crtc *imx_drm_crtc_by_num(struct imx_drm_device *imxdrm,
103 struct imx_drm_crtc *imx_drm_crtc;
105 list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list)
106 if (imx_drm_crtc->pipe == num)
111 int imx_drm_crtc_panel_format_pins(struct drm_crtc *crtc, u32 encoder_type,
112 u32 interface_pix_fmt, int hsync_pin, int vsync_pin)
114 struct imx_drm_device *imxdrm = crtc->dev->dev_private;
115 struct imx_drm_crtc *imx_crtc;
116 struct imx_drm_crtc_helper_funcs *helper;
118 list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list)
119 if (imx_crtc->crtc == crtc)
124 helper = &imx_crtc->imx_drm_helper_funcs;
125 if (helper->set_interface_pix_fmt)
126 return helper->set_interface_pix_fmt(crtc,
127 encoder_type, interface_pix_fmt,
128 hsync_pin, vsync_pin);
131 EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format_pins);
133 int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type,
134 u32 interface_pix_fmt)
136 return imx_drm_crtc_panel_format_pins(crtc, encoder_type,
137 interface_pix_fmt, 2, 3);
139 EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format);
141 int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
143 return drm_vblank_get(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
145 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
147 void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
149 drm_vblank_put(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
151 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
153 void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
155 drm_handle_vblank(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
157 EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
159 static int imx_drm_enable_vblank(struct drm_device *drm, int crtc)
161 struct imx_drm_device *imxdrm = drm->dev_private;
162 struct imx_drm_crtc *imx_drm_crtc;
165 imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
169 if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
172 ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
178 static void imx_drm_disable_vblank(struct drm_device *drm, int crtc)
180 struct imx_drm_device *imxdrm = drm->dev_private;
181 struct imx_drm_crtc *imx_drm_crtc;
183 imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
187 if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
190 imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
193 static void imx_drm_driver_preclose(struct drm_device *drm,
194 struct drm_file *file)
198 if (!file->is_master)
201 for (i = 0; i < 4; i++)
202 imx_drm_disable_vblank(drm , i);
205 static const struct file_operations imx_drm_driver_fops = {
206 .owner = THIS_MODULE,
208 .release = drm_release,
209 .unlocked_ioctl = drm_ioctl,
210 .mmap = drm_gem_cma_mmap,
213 .llseek = noop_llseek,
216 static struct imx_drm_device *imx_drm_device;
218 static struct imx_drm_device *__imx_drm_device(void)
220 return imx_drm_device;
223 struct drm_device *imx_drm_device_get(void)
225 struct imx_drm_device *imxdrm = __imx_drm_device();
226 struct imx_drm_encoder *enc;
227 struct imx_drm_connector *con;
228 struct imx_drm_crtc *crtc;
230 list_for_each_entry(enc, &imxdrm->encoder_list, list) {
231 if (!try_module_get(enc->owner)) {
232 dev_err(imxdrm->dev, "could not get module %s\n",
233 module_name(enc->owner));
238 list_for_each_entry(con, &imxdrm->connector_list, list) {
239 if (!try_module_get(con->owner)) {
240 dev_err(imxdrm->dev, "could not get module %s\n",
241 module_name(con->owner));
246 list_for_each_entry(crtc, &imxdrm->crtc_list, list) {
247 if (!try_module_get(crtc->owner)) {
248 dev_err(imxdrm->dev, "could not get module %s\n",
249 module_name(crtc->owner));
257 list_for_each_entry_continue_reverse(crtc, &imxdrm->crtc_list, list)
258 module_put(crtc->owner);
260 list_for_each_entry_continue_reverse(con, &imxdrm->connector_list, list)
261 module_put(con->owner);
263 list_for_each_entry_continue_reverse(enc, &imxdrm->encoder_list, list)
264 module_put(enc->owner);
266 mutex_unlock(&imxdrm->mutex);
271 EXPORT_SYMBOL_GPL(imx_drm_device_get);
273 void imx_drm_device_put(void)
275 struct imx_drm_device *imxdrm = __imx_drm_device();
276 struct imx_drm_encoder *enc;
277 struct imx_drm_connector *con;
278 struct imx_drm_crtc *crtc;
280 mutex_lock(&imxdrm->mutex);
282 list_for_each_entry(crtc, &imxdrm->crtc_list, list)
283 module_put(crtc->owner);
285 list_for_each_entry(con, &imxdrm->connector_list, list)
286 module_put(con->owner);
288 list_for_each_entry(enc, &imxdrm->encoder_list, list)
289 module_put(enc->owner);
291 mutex_unlock(&imxdrm->mutex);
293 EXPORT_SYMBOL_GPL(imx_drm_device_put);
295 static int drm_mode_group_reinit(struct drm_device *dev)
297 struct drm_mode_group *group = &dev->primary->mode_group;
298 uint32_t *id_list = group->id_list;
301 ret = drm_mode_group_init_legacy_group(dev, group);
310 * register an encoder to the drm core
312 static int imx_drm_encoder_register(struct imx_drm_encoder *imx_drm_encoder)
314 struct imx_drm_device *imxdrm = __imx_drm_device();
316 INIT_LIST_HEAD(&imx_drm_encoder->possible_crtcs);
318 drm_encoder_init(imxdrm->drm, imx_drm_encoder->encoder,
319 imx_drm_encoder->encoder->funcs,
320 imx_drm_encoder->encoder->encoder_type);
322 drm_mode_group_reinit(imxdrm->drm);
328 * unregister an encoder from the drm core
330 static void imx_drm_encoder_unregister(struct imx_drm_encoder
333 struct imx_drm_device *imxdrm = __imx_drm_device();
335 drm_encoder_cleanup(imx_drm_encoder->encoder);
337 drm_mode_group_reinit(imxdrm->drm);
341 * register a connector to the drm core
343 static int imx_drm_connector_register(
344 struct imx_drm_connector *imx_drm_connector)
346 struct imx_drm_device *imxdrm = __imx_drm_device();
348 drm_connector_init(imxdrm->drm, imx_drm_connector->connector,
349 imx_drm_connector->connector->funcs,
350 imx_drm_connector->connector->connector_type);
351 drm_mode_group_reinit(imxdrm->drm);
353 return drm_sysfs_connector_add(imx_drm_connector->connector);
357 * unregister a connector from the drm core
359 static void imx_drm_connector_unregister(
360 struct imx_drm_connector *imx_drm_connector)
362 struct imx_drm_device *imxdrm = __imx_drm_device();
364 drm_sysfs_connector_remove(imx_drm_connector->connector);
365 drm_connector_cleanup(imx_drm_connector->connector);
367 drm_mode_group_reinit(imxdrm->drm);
371 * register a crtc to the drm core
373 static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc)
375 struct imx_drm_device *imxdrm = __imx_drm_device();
378 drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc,
379 imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
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_mode_group_reinit(imxdrm->drm);
393 * Called by the CRTC driver when all CRTCs are registered. This
394 * puts all the pieces together and initializes the driver.
395 * Once this is called no more CRTCs can be registered since
396 * the drm core has hardcoded the number of crtcs in several
399 static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
401 struct imx_drm_device *imxdrm = __imx_drm_device();
406 drm->dev_private = imxdrm;
409 * enable drm irq mode.
410 * - with irq_enabled = true, we can use the vblank feature.
412 * P.S. note that we wouldn't use drm irq handler but
413 * just specific driver own one instead because
414 * drm framework supports only one irq handler and
415 * drivers can well take care of their interrupts
417 drm->irq_enabled = true;
419 drm_mode_config_init(drm);
420 imx_drm_mode_config_init(drm);
422 mutex_lock(&imxdrm->mutex);
424 drm_kms_helper_poll_init(imxdrm->drm);
426 /* setup the grouping for the legacy output */
427 ret = drm_mode_group_init_legacy_group(imxdrm->drm,
428 &imxdrm->drm->primary->mode_group);
432 ret = drm_vblank_init(imxdrm->drm, MAX_CRTC);
437 * with vblank_disable_allowed = true, vblank interrupt will be disabled
438 * by drm timer once a current process gives up ownership of
439 * vblank event.(after drm_vblank_put function is called)
441 imxdrm->drm->vblank_disable_allowed = true;
443 if (!imx_drm_device_get())
449 mutex_unlock(&imxdrm->mutex);
454 static void imx_drm_update_possible_crtcs(void)
456 struct imx_drm_device *imxdrm = __imx_drm_device();
457 struct imx_drm_crtc *imx_drm_crtc;
458 struct imx_drm_encoder *enc;
459 struct crtc_cookie *cookie;
461 list_for_each_entry(enc, &imxdrm->encoder_list, list) {
462 u32 possible_crtcs = 0;
464 list_for_each_entry(cookie, &enc->possible_crtcs, list) {
465 list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) {
466 if (imx_drm_crtc->cookie.cookie == cookie->cookie &&
467 imx_drm_crtc->cookie.id == cookie->id) {
468 possible_crtcs |= 1 << imx_drm_crtc->pipe;
472 enc->encoder->possible_crtcs = possible_crtcs;
473 enc->encoder->possible_clones = possible_crtcs;
478 * imx_drm_add_crtc - add a new crtc
480 * The return value if !NULL is a cookie for the caller to pass to
481 * imx_drm_remove_crtc later.
483 int imx_drm_add_crtc(struct drm_crtc *crtc,
484 struct imx_drm_crtc **new_crtc,
485 const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
486 struct module *owner, void *cookie, int id)
488 struct imx_drm_device *imxdrm = __imx_drm_device();
489 struct imx_drm_crtc *imx_drm_crtc;
492 mutex_lock(&imxdrm->mutex);
494 if (imxdrm->drm->open_count) {
499 imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
505 imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
506 imx_drm_crtc->pipe = imxdrm->pipes++;
507 imx_drm_crtc->cookie.cookie = cookie;
508 imx_drm_crtc->cookie.id = id;
510 imx_drm_crtc->crtc = crtc;
511 imx_drm_crtc->imxdrm = imxdrm;
513 imx_drm_crtc->owner = owner;
515 list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list);
517 *new_crtc = imx_drm_crtc;
519 ret = imx_drm_crtc_register(imx_drm_crtc);
523 imx_drm_update_possible_crtcs();
525 mutex_unlock(&imxdrm->mutex);
533 mutex_unlock(&imxdrm->mutex);
536 EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
539 * imx_drm_remove_crtc - remove a crtc
541 int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
543 struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm;
545 mutex_lock(&imxdrm->mutex);
547 drm_crtc_cleanup(imx_drm_crtc->crtc);
549 list_del(&imx_drm_crtc->list);
551 drm_mode_group_reinit(imxdrm->drm);
553 mutex_unlock(&imxdrm->mutex);
559 EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
562 * imx_drm_add_encoder - add a new encoder
564 int imx_drm_add_encoder(struct drm_encoder *encoder,
565 struct imx_drm_encoder **newenc, struct module *owner)
567 struct imx_drm_device *imxdrm = __imx_drm_device();
568 struct imx_drm_encoder *imx_drm_encoder;
571 mutex_lock(&imxdrm->mutex);
573 if (imxdrm->drm->open_count) {
578 imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL);
579 if (!imx_drm_encoder) {
584 imx_drm_encoder->encoder = encoder;
585 imx_drm_encoder->owner = owner;
587 ret = imx_drm_encoder_register(imx_drm_encoder);
593 list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list);
595 *newenc = imx_drm_encoder;
597 mutex_unlock(&imxdrm->mutex);
602 kfree(imx_drm_encoder);
605 mutex_unlock(&imxdrm->mutex);
609 EXPORT_SYMBOL_GPL(imx_drm_add_encoder);
611 int imx_drm_encoder_add_possible_crtcs(
612 struct imx_drm_encoder *imx_drm_encoder,
613 struct device_node *np)
615 struct imx_drm_device *imxdrm = __imx_drm_device();
616 struct of_phandle_args args;
617 struct crtc_cookie *c;
621 if (!list_empty(&imx_drm_encoder->possible_crtcs))
624 for (i = 0; !ret; i++) {
625 ret = of_parse_phandle_with_args(np, "crtcs",
626 "#crtc-cells", i, &args);
630 c = kzalloc(sizeof(*c), GFP_KERNEL);
632 of_node_put(args.np);
637 c->id = args.args_count > 0 ? args.args[0] : 0;
639 of_node_put(args.np);
641 mutex_lock(&imxdrm->mutex);
643 list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs);
645 mutex_unlock(&imxdrm->mutex);
648 imx_drm_update_possible_crtcs();
652 EXPORT_SYMBOL_GPL(imx_drm_encoder_add_possible_crtcs);
654 int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder,
655 struct drm_crtc *crtc)
657 struct imx_drm_device *imxdrm = __imx_drm_device();
658 struct imx_drm_crtc *imx_crtc;
661 list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) {
662 if (imx_crtc->crtc == crtc)
671 EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);
674 * imx_drm_remove_encoder - remove an encoder
676 int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder)
678 struct imx_drm_device *imxdrm = __imx_drm_device();
679 struct crtc_cookie *c, *tmp;
681 mutex_lock(&imxdrm->mutex);
683 imx_drm_encoder_unregister(imx_drm_encoder);
685 list_del(&imx_drm_encoder->list);
687 list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs,
691 mutex_unlock(&imxdrm->mutex);
693 kfree(imx_drm_encoder);
697 EXPORT_SYMBOL_GPL(imx_drm_remove_encoder);
700 * imx_drm_add_connector - add a connector
702 int imx_drm_add_connector(struct drm_connector *connector,
703 struct imx_drm_connector **new_con,
704 struct module *owner)
706 struct imx_drm_device *imxdrm = __imx_drm_device();
707 struct imx_drm_connector *imx_drm_connector;
710 mutex_lock(&imxdrm->mutex);
712 if (imxdrm->drm->open_count) {
717 imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL);
718 if (!imx_drm_connector) {
723 imx_drm_connector->connector = connector;
724 imx_drm_connector->owner = owner;
726 ret = imx_drm_connector_register(imx_drm_connector);
730 list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list);
732 *new_con = imx_drm_connector;
734 mutex_unlock(&imxdrm->mutex);
739 kfree(imx_drm_connector);
742 mutex_unlock(&imxdrm->mutex);
746 EXPORT_SYMBOL_GPL(imx_drm_add_connector);
748 void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper)
750 struct imx_drm_device *imxdrm = __imx_drm_device();
752 imxdrm->fbhelper = fbdev_helper;
754 EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set);
757 * imx_drm_remove_connector - remove a connector
759 int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector)
761 struct imx_drm_device *imxdrm = __imx_drm_device();
763 mutex_lock(&imxdrm->mutex);
765 imx_drm_connector_unregister(imx_drm_connector);
767 list_del(&imx_drm_connector->list);
769 mutex_unlock(&imxdrm->mutex);
771 kfree(imx_drm_connector);
775 EXPORT_SYMBOL_GPL(imx_drm_remove_connector);
777 static const struct drm_ioctl_desc imx_drm_ioctls[] = {
781 static struct drm_driver imx_drm_driver = {
782 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
783 .load = imx_drm_driver_load,
784 .unload = imx_drm_driver_unload,
785 .lastclose = imx_drm_driver_lastclose,
786 .preclose = imx_drm_driver_preclose,
787 .gem_free_object = drm_gem_cma_free_object,
788 .gem_vm_ops = &drm_gem_cma_vm_ops,
789 .dumb_create = drm_gem_cma_dumb_create,
790 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
791 .dumb_destroy = drm_gem_dumb_destroy,
793 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
794 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
795 .gem_prime_import = drm_gem_prime_import,
796 .gem_prime_export = drm_gem_prime_export,
797 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
798 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
799 .gem_prime_vmap = drm_gem_cma_prime_vmap,
800 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
801 .gem_prime_mmap = drm_gem_cma_prime_mmap,
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,
809 .desc = "i.MX DRM graphics",
816 static int imx_drm_platform_probe(struct platform_device *pdev)
820 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
824 imx_drm_device->dev = &pdev->dev;
826 return drm_platform_init(&imx_drm_driver, pdev);
829 static int imx_drm_platform_remove(struct platform_device *pdev)
831 drm_platform_exit(&imx_drm_driver, pdev);
836 static struct platform_driver imx_drm_pdrv = {
837 .probe = imx_drm_platform_probe,
838 .remove = imx_drm_platform_remove,
840 .owner = THIS_MODULE,
845 static struct platform_device *imx_drm_pdev;
847 static int __init imx_drm_init(void)
851 imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL);
855 mutex_init(&imx_drm_device->mutex);
856 INIT_LIST_HEAD(&imx_drm_device->crtc_list);
857 INIT_LIST_HEAD(&imx_drm_device->connector_list);
858 INIT_LIST_HEAD(&imx_drm_device->encoder_list);
860 imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0);
866 ret = platform_driver_register(&imx_drm_pdrv);
873 platform_device_unregister(imx_drm_pdev);
875 kfree(imx_drm_device);
880 static void __exit imx_drm_exit(void)
882 platform_device_unregister(imx_drm_pdev);
883 platform_driver_unregister(&imx_drm_pdrv);
885 kfree(imx_drm_device);
888 module_init(imx_drm_init);
889 module_exit(imx_drm_exit);
891 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
892 MODULE_DESCRIPTION("i.MX drm driver core");
893 MODULE_LICENSE("GPL");