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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
4 * Author: Rob Clark <rob@ti.com>
5 */
6
7#include <linux/dma-mapping.h>
8#include <linux/platform_device.h>
9#include <linux/sort.h>
10#include <linux/sys_soc.h>
11
12#include <drm/drm_atomic.h>
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_drv.h>
15#include <drm/drm_fb_helper.h>
16#include <drm/drm_file.h>
17#include <drm/drm_ioctl.h>
18#include <drm/drm_panel.h>
19#include <drm/drm_prime.h>
20#include <drm/drm_probe_helper.h>
21#include <drm/drm_vblank.h>
22
23#include "omap_dmm_tiler.h"
24#include "omap_drv.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/*
34 * mode config funcs
35 */
36
37/* Notes about mapping DSS and DRM entities:
38 * CRTC: overlay
39 * encoder: manager.. with some extension to allow one primary CRTC
40 * and zero or more video CRTC's to be mapped to one encoder?
41 * connector: dssdev.. manager can be attached/detached from different
42 * devices
43 */
44
45static void omap_atomic_wait_for_completion(struct drm_device *dev,
46 struct drm_atomic_state *old_state)
47{
48 struct drm_crtc_state *new_crtc_state;
49 struct drm_crtc *crtc;
50 unsigned int i;
51 int ret;
52
53 for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
54 if (!new_crtc_state->active)
55 continue;
56
57 ret = omap_crtc_wait_pending(crtc);
58
59 if (!ret)
60 dev_warn(dev->dev,
61 "atomic complete timeout (pipe %u)!\n", i);
62 }
63}
64
65static void omap_atomic_commit_tail(struct drm_atomic_state *old_state)
66{
67 struct drm_device *dev = old_state->dev;
68 struct omap_drm_private *priv = dev->dev_private;
69
70 priv->dispc_ops->runtime_get(priv->dispc);
71
72 /* Apply the atomic update. */
73 drm_atomic_helper_commit_modeset_disables(dev, old_state);
74
75 if (priv->omaprev != 0x3430) {
76 /* With the current dss dispc implementation we have to enable
77 * the new modeset before we can commit planes. The dispc ovl
78 * configuration relies on the video mode configuration been
79 * written into the HW when the ovl configuration is
80 * calculated.
81 *
82 * This approach is not ideal because after a mode change the
83 * plane update is executed only after the first vblank
84 * interrupt. The dispc implementation should be fixed so that
85 * it is able use uncommitted drm state information.
86 */
87 drm_atomic_helper_commit_modeset_enables(dev, old_state);
88 omap_atomic_wait_for_completion(dev, old_state);
89
90 drm_atomic_helper_commit_planes(dev, old_state, 0);
91
92 drm_atomic_helper_commit_hw_done(old_state);
93 } else {
94 /*
95 * OMAP3 DSS seems to have issues with the work-around above,
96 * resulting in endless sync losts if a crtc is enabled without
97 * a plane. For now, skip the WA for OMAP3.
98 */
99 drm_atomic_helper_commit_planes(dev, old_state, 0);
100
101 drm_atomic_helper_commit_modeset_enables(dev, old_state);
102
103 drm_atomic_helper_commit_hw_done(old_state);
104 }
105
106 /*
107 * Wait for completion of the page flips to ensure that old buffers
108 * can't be touched by the hardware anymore before cleaning up planes.
109 */
110 omap_atomic_wait_for_completion(dev, old_state);
111
112 drm_atomic_helper_cleanup_planes(dev, old_state);
113
114 priv->dispc_ops->runtime_put(priv->dispc);
115}
116
117static const struct drm_mode_config_helper_funcs omap_mode_config_helper_funcs = {
118 .atomic_commit_tail = omap_atomic_commit_tail,
119};
120
121static const struct drm_mode_config_funcs omap_mode_config_funcs = {
122 .fb_create = omap_framebuffer_create,
123 .output_poll_changed = drm_fb_helper_output_poll_changed,
124 .atomic_check = drm_atomic_helper_check,
125 .atomic_commit = drm_atomic_helper_commit,
126};
127
128static void omap_disconnect_pipelines(struct drm_device *ddev)
129{
130 struct omap_drm_private *priv = ddev->dev_private;
131 unsigned int i;
132
133 for (i = 0; i < priv->num_pipes; i++) {
134 struct omap_drm_pipeline *pipe = &priv->pipes[i];
135
136 if (pipe->output->panel)
137 drm_panel_detach(pipe->output->panel);
138
139 omapdss_device_disconnect(NULL, pipe->output);
140
141 omapdss_device_put(pipe->output);
142 pipe->output = NULL;
143 }
144
145 memset(&priv->channels, 0, sizeof(priv->channels));
146
147 priv->num_pipes = 0;
148}
149
150static int omap_connect_pipelines(struct drm_device *ddev)
151{
152 struct omap_drm_private *priv = ddev->dev_private;
153 struct omap_dss_device *output = NULL;
154 int r;
155
156 for_each_dss_output(output) {
157 r = omapdss_device_connect(priv->dss, NULL, output);
158 if (r == -EPROBE_DEFER) {
159 omapdss_device_put(output);
160 return r;
161 } else if (r) {
162 dev_warn(output->dev, "could not connect output %s\n",
163 output->name);
164 } else {
165 struct omap_drm_pipeline *pipe;
166
167 pipe = &priv->pipes[priv->num_pipes++];
168 pipe->output = omapdss_device_get(output);
169
170 if (priv->num_pipes == ARRAY_SIZE(priv->pipes)) {
171 /* To balance the 'for_each_dss_output' loop */
172 omapdss_device_put(output);
173 break;
174 }
175 }
176 }
177
178 return 0;
179}
180
181static int omap_compare_pipelines(const void *a, const void *b)
182{
183 const struct omap_drm_pipeline *pipe1 = a;
184 const struct omap_drm_pipeline *pipe2 = b;
185
186 if (pipe1->alias_id > pipe2->alias_id)
187 return 1;
188 else if (pipe1->alias_id < pipe2->alias_id)
189 return -1;
190 return 0;
191}
192
193static int omap_modeset_init_properties(struct drm_device *dev)
194{
195 struct omap_drm_private *priv = dev->dev_private;
196 unsigned int num_planes = priv->dispc_ops->get_num_ovls(priv->dispc);
197
198 priv->zorder_prop = drm_property_create_range(dev, 0, "zorder", 0,
199 num_planes - 1);
200 if (!priv->zorder_prop)
201 return -ENOMEM;
202
203 return 0;
204}
205
206static int omap_display_id(struct omap_dss_device *output)
207{
208 struct device_node *node = NULL;
209
210 if (output->next) {
211 struct omap_dss_device *display;
212
213 display = omapdss_display_get(output);
214 node = display->dev->of_node;
215 omapdss_device_put(display);
216 } else if (output->bridge) {
217 struct drm_bridge *bridge = output->bridge;
218
219 while (bridge->next)
220 bridge = bridge->next;
221
222 node = bridge->of_node;
223 } else if (output->panel) {
224 node = output->panel->dev->of_node;
225 }
226
227 return node ? of_alias_get_id(node, "display") : -ENODEV;
228}
229
230static int omap_modeset_init(struct drm_device *dev)
231{
232 struct omap_drm_private *priv = dev->dev_private;
233 int num_ovls = priv->dispc_ops->get_num_ovls(priv->dispc);
234 int num_mgrs = priv->dispc_ops->get_num_mgrs(priv->dispc);
235 unsigned int i;
236 int ret;
237 u32 plane_crtc_mask;
238
239 if (!omapdss_stack_is_ready())
240 return -EPROBE_DEFER;
241
242 drm_mode_config_init(dev);
243
244 ret = omap_modeset_init_properties(dev);
245 if (ret < 0)
246 return ret;
247
248 /*
249 * This function creates exactly one connector, encoder, crtc,
250 * and primary plane per each connected dss-device. Each
251 * connector->encoder->crtc chain is expected to be separate
252 * and each crtc is connect to a single dss-channel. If the
253 * configuration does not match the expectations or exceeds
254 * the available resources, the configuration is rejected.
255 */
256 ret = omap_connect_pipelines(dev);
257 if (ret < 0)
258 return ret;
259
260 if (priv->num_pipes > num_mgrs || priv->num_pipes > num_ovls) {
261 dev_err(dev->dev, "%s(): Too many connected displays\n",
262 __func__);
263 return -EINVAL;
264 }
265
266 /* Create all planes first. They can all be put to any CRTC. */
267 plane_crtc_mask = (1 << priv->num_pipes) - 1;
268
269 for (i = 0; i < num_ovls; i++) {
270 enum drm_plane_type type = i < priv->num_pipes
271 ? DRM_PLANE_TYPE_PRIMARY
272 : DRM_PLANE_TYPE_OVERLAY;
273 struct drm_plane *plane;
274
275 if (WARN_ON(priv->num_planes >= ARRAY_SIZE(priv->planes)))
276 return -EINVAL;
277
278 plane = omap_plane_init(dev, i, type, plane_crtc_mask);
279 if (IS_ERR(plane))
280 return PTR_ERR(plane);
281
282 priv->planes[priv->num_planes++] = plane;
283 }
284
285 /*
286 * Create the encoders, attach the bridges and get the pipeline alias
287 * IDs.
288 */
289 for (i = 0; i < priv->num_pipes; i++) {
290 struct omap_drm_pipeline *pipe = &priv->pipes[i];
291 int id;
292
293 pipe->encoder = omap_encoder_init(dev, pipe->output);
294 if (!pipe->encoder)
295 return -ENOMEM;
296
297 if (pipe->output->bridge) {
298 ret = drm_bridge_attach(pipe->encoder,
299 pipe->output->bridge, NULL);
300 if (ret < 0)
301 return ret;
302 }
303
304 id = omap_display_id(pipe->output);
305 pipe->alias_id = id >= 0 ? id : i;
306 }
307
308 /* Sort the pipelines by DT aliases. */
309 sort(priv->pipes, priv->num_pipes, sizeof(priv->pipes[0]),
310 omap_compare_pipelines, NULL);
311
312 /*
313 * Populate the pipeline lookup table by DISPC channel. Only one display
314 * is allowed per channel.
315 */
316 for (i = 0; i < priv->num_pipes; ++i) {
317 struct omap_drm_pipeline *pipe = &priv->pipes[i];
318 enum omap_channel channel = pipe->output->dispc_channel;
319
320 if (WARN_ON(priv->channels[channel] != NULL))
321 return -EINVAL;
322
323 priv->channels[channel] = pipe;
324 }
325
326 /* Create the connectors and CRTCs. */
327 for (i = 0; i < priv->num_pipes; i++) {
328 struct omap_drm_pipeline *pipe = &priv->pipes[i];
329 struct drm_encoder *encoder = pipe->encoder;
330 struct drm_crtc *crtc;
331
332 if (!pipe->output->bridge) {
333 pipe->connector = omap_connector_init(dev, pipe->output,
334 encoder);
335 if (!pipe->connector)
336 return -ENOMEM;
337
338 drm_connector_attach_encoder(pipe->connector, encoder);
339
340 if (pipe->output->panel) {
341 ret = drm_panel_attach(pipe->output->panel,
342 pipe->connector);
343 if (ret < 0)
344 return ret;
345 }
346 }
347
348 crtc = omap_crtc_init(dev, pipe, priv->planes[i]);
349 if (IS_ERR(crtc))
350 return PTR_ERR(crtc);
351
352 encoder->possible_crtcs = 1 << i;
353 pipe->crtc = crtc;
354 }
355
356 DBG("registered %u planes, %u crtcs/encoders/connectors\n",
357 priv->num_planes, priv->num_pipes);
358
359 dev->mode_config.min_width = 8;
360 dev->mode_config.min_height = 2;
361
362 /*
363 * Note: these values are used for multiple independent things:
364 * connector mode filtering, buffer sizes, crtc sizes...
365 * Use big enough values here to cover all use cases, and do more
366 * specific checking in the respective code paths.
367 */
368 dev->mode_config.max_width = 8192;
369 dev->mode_config.max_height = 8192;
370
371 /* We want the zpos to be normalized */
372 dev->mode_config.normalize_zpos = true;
373
374 dev->mode_config.funcs = &omap_mode_config_funcs;
375 dev->mode_config.helper_private = &omap_mode_config_helper_funcs;
376
377 drm_mode_config_reset(dev);
378
379 omap_drm_irq_install(dev);
380
381 return 0;
382}
383
384/*
385 * Enable the HPD in external components if supported
386 */
387static void omap_modeset_enable_external_hpd(struct drm_device *ddev)
388{
389 struct omap_drm_private *priv = ddev->dev_private;
390 unsigned int i;
391
392 for (i = 0; i < priv->num_pipes; i++) {
393 if (priv->pipes[i].connector)
394 omap_connector_enable_hpd(priv->pipes[i].connector);
395 }
396}
397
398/*
399 * Disable the HPD in external components if supported
400 */
401static void omap_modeset_disable_external_hpd(struct drm_device *ddev)
402{
403 struct omap_drm_private *priv = ddev->dev_private;
404 unsigned int i;
405
406 for (i = 0; i < priv->num_pipes; i++) {
407 if (priv->pipes[i].connector)
408 omap_connector_disable_hpd(priv->pipes[i].connector);
409 }
410}
411
412/*
413 * drm ioctl funcs
414 */
415
416
417static int ioctl_get_param(struct drm_device *dev, void *data,
418 struct drm_file *file_priv)
419{
420 struct omap_drm_private *priv = dev->dev_private;
421 struct drm_omap_param *args = data;
422
423 DBG("%p: param=%llu", dev, args->param);
424
425 switch (args->param) {
426 case OMAP_PARAM_CHIPSET_ID:
427 args->value = priv->omaprev;
428 break;
429 default:
430 DBG("unknown parameter %lld", args->param);
431 return -EINVAL;
432 }
433
434 return 0;
435}
436
437#define OMAP_BO_USER_MASK 0x00ffffff /* flags settable by userspace */
438
439static int ioctl_gem_new(struct drm_device *dev, void *data,
440 struct drm_file *file_priv)
441{
442 struct drm_omap_gem_new *args = data;
443 u32 flags = args->flags & OMAP_BO_USER_MASK;
444
445 VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
446 args->size.bytes, flags);
447
448 return omap_gem_new_handle(dev, file_priv, args->size, flags,
449 &args->handle);
450}
451
452static int ioctl_gem_info(struct drm_device *dev, void *data,
453 struct drm_file *file_priv)
454{
455 struct drm_omap_gem_info *args = data;
456 struct drm_gem_object *obj;
457 int ret = 0;
458
459 VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
460
461 obj = drm_gem_object_lookup(file_priv, args->handle);
462 if (!obj)
463 return -ENOENT;
464
465 args->size = omap_gem_mmap_size(obj);
466 args->offset = omap_gem_mmap_offset(obj);
467
468 drm_gem_object_put_unlocked(obj);
469
470 return ret;
471}
472
473static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
474 DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param,
475 DRM_RENDER_ALLOW),
476 DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, drm_invalid_op,
477 DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
478 DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new,
479 DRM_RENDER_ALLOW),
480 /* Deprecated, to be removed. */
481 DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, drm_noop,
482 DRM_RENDER_ALLOW),
483 /* Deprecated, to be removed. */
484 DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, drm_noop,
485 DRM_RENDER_ALLOW),
486 DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info,
487 DRM_RENDER_ALLOW),
488};
489
490/*
491 * drm driver funcs
492 */
493
494static int dev_open(struct drm_device *dev, struct drm_file *file)
495{
496 file->driver_priv = NULL;
497
498 DBG("open: dev=%p, file=%p", dev, file);
499
500 return 0;
501}
502
503static const struct vm_operations_struct omap_gem_vm_ops = {
504 .fault = omap_gem_fault,
505 .open = drm_gem_vm_open,
506 .close = drm_gem_vm_close,
507};
508
509static const struct file_operations omapdriver_fops = {
510 .owner = THIS_MODULE,
511 .open = drm_open,
512 .unlocked_ioctl = drm_ioctl,
513 .compat_ioctl = drm_compat_ioctl,
514 .release = drm_release,
515 .mmap = omap_gem_mmap,
516 .poll = drm_poll,
517 .read = drm_read,
518 .llseek = noop_llseek,
519};
520
521static struct drm_driver omap_drm_driver = {
522 .driver_features = DRIVER_MODESET | DRIVER_GEM |
523 DRIVER_ATOMIC | DRIVER_RENDER,
524 .open = dev_open,
525 .lastclose = drm_fb_helper_lastclose,
526#ifdef CONFIG_DEBUG_FS
527 .debugfs_init = omap_debugfs_init,
528#endif
529 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
530 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
531 .gem_prime_export = omap_gem_prime_export,
532 .gem_prime_import = omap_gem_prime_import,
533 .gem_free_object_unlocked = omap_gem_free_object,
534 .gem_vm_ops = &omap_gem_vm_ops,
535 .dumb_create = omap_gem_dumb_create,
536 .dumb_map_offset = omap_gem_dumb_map_offset,
537 .ioctls = ioctls,
538 .num_ioctls = DRM_OMAP_NUM_IOCTLS,
539 .fops = &omapdriver_fops,
540 .name = DRIVER_NAME,
541 .desc = DRIVER_DESC,
542 .date = DRIVER_DATE,
543 .major = DRIVER_MAJOR,
544 .minor = DRIVER_MINOR,
545 .patchlevel = DRIVER_PATCHLEVEL,
546};
547
548static const struct soc_device_attribute omapdrm_soc_devices[] = {
549 { .family = "OMAP3", .data = (void *)0x3430 },
550 { .family = "OMAP4", .data = (void *)0x4430 },
551 { .family = "OMAP5", .data = (void *)0x5430 },
552 { .family = "DRA7", .data = (void *)0x0752 },
553 { /* sentinel */ }
554};
555
556static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
557{
558 const struct soc_device_attribute *soc;
559 struct drm_device *ddev;
560 unsigned int i;
561 int ret;
562
563 DBG("%s", dev_name(dev));
564
565 /* Allocate and initialize the DRM device. */
566 ddev = drm_dev_alloc(&omap_drm_driver, dev);
567 if (IS_ERR(ddev))
568 return PTR_ERR(ddev);
569
570 priv->ddev = ddev;
571 ddev->dev_private = priv;
572
573 priv->dev = dev;
574 priv->dss = omapdss_get_dss();
575 priv->dispc = dispc_get_dispc(priv->dss);
576 priv->dispc_ops = dispc_get_ops(priv->dss);
577
578 omap_crtc_pre_init(priv);
579
580 soc = soc_device_match(omapdrm_soc_devices);
581 priv->omaprev = soc ? (unsigned int)soc->data : 0;
582 priv->wq = alloc_ordered_workqueue("omapdrm", 0);
583
584 mutex_init(&priv->list_lock);
585 INIT_LIST_HEAD(&priv->obj_list);
586
587 /* Get memory bandwidth limits */
588 if (priv->dispc_ops->get_memory_bandwidth_limit)
589 priv->max_bandwidth =
590 priv->dispc_ops->get_memory_bandwidth_limit(priv->dispc);
591
592 omap_gem_init(ddev);
593
594 ret = omap_modeset_init(ddev);
595 if (ret) {
596 dev_err(priv->dev, "omap_modeset_init failed: ret=%d\n", ret);
597 goto err_gem_deinit;
598 }
599
600 /* Initialize vblank handling, start with all CRTCs disabled. */
601 ret = drm_vblank_init(ddev, priv->num_pipes);
602 if (ret) {
603 dev_err(priv->dev, "could not init vblank\n");
604 goto err_cleanup_modeset;
605 }
606
607 for (i = 0; i < priv->num_pipes; i++)
608 drm_crtc_vblank_off(priv->pipes[i].crtc);
609
610 omap_fbdev_init(ddev);
611
612 drm_kms_helper_poll_init(ddev);
613 omap_modeset_enable_external_hpd(ddev);
614
615 /*
616 * Register the DRM device with the core and the connectors with
617 * sysfs.
618 */
619 ret = drm_dev_register(ddev, 0);
620 if (ret)
621 goto err_cleanup_helpers;
622
623 return 0;
624
625err_cleanup_helpers:
626 omap_modeset_disable_external_hpd(ddev);
627 drm_kms_helper_poll_fini(ddev);
628
629 omap_fbdev_fini(ddev);
630err_cleanup_modeset:
631 drm_mode_config_cleanup(ddev);
632 omap_drm_irq_uninstall(ddev);
633err_gem_deinit:
634 omap_gem_deinit(ddev);
635 destroy_workqueue(priv->wq);
636 omap_disconnect_pipelines(ddev);
637 omap_crtc_pre_uninit(priv);
638 drm_dev_put(ddev);
639 return ret;
640}
641
642static void omapdrm_cleanup(struct omap_drm_private *priv)
643{
644 struct drm_device *ddev = priv->ddev;
645
646 DBG("");
647
648 drm_dev_unregister(ddev);
649
650 omap_modeset_disable_external_hpd(ddev);
651 drm_kms_helper_poll_fini(ddev);
652
653 omap_fbdev_fini(ddev);
654
655 drm_atomic_helper_shutdown(ddev);
656
657 drm_mode_config_cleanup(ddev);
658
659 omap_drm_irq_uninstall(ddev);
660 omap_gem_deinit(ddev);
661
662 destroy_workqueue(priv->wq);
663
664 omap_disconnect_pipelines(ddev);
665 omap_crtc_pre_uninit(priv);
666
667 drm_dev_put(ddev);
668}
669
670static int pdev_probe(struct platform_device *pdev)
671{
672 struct omap_drm_private *priv;
673 int ret;
674
675 if (omapdss_is_initialized() == false)
676 return -EPROBE_DEFER;
677
678 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
679 if (ret) {
680 dev_err(&pdev->dev, "Failed to set the DMA mask\n");
681 return ret;
682 }
683
684 /* Allocate and initialize the driver private structure. */
685 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
686 if (!priv)
687 return -ENOMEM;
688
689 platform_set_drvdata(pdev, priv);
690
691 ret = omapdrm_init(priv, &pdev->dev);
692 if (ret < 0)
693 kfree(priv);
694
695 return ret;
696}
697
698static int pdev_remove(struct platform_device *pdev)
699{
700 struct omap_drm_private *priv = platform_get_drvdata(pdev);
701
702 omapdrm_cleanup(priv);
703 kfree(priv);
704
705 return 0;
706}
707
708#ifdef CONFIG_PM_SLEEP
709static int omap_drm_suspend(struct device *dev)
710{
711 struct omap_drm_private *priv = dev_get_drvdata(dev);
712 struct drm_device *drm_dev = priv->ddev;
713
714 return drm_mode_config_helper_suspend(drm_dev);
715}
716
717static int omap_drm_resume(struct device *dev)
718{
719 struct omap_drm_private *priv = dev_get_drvdata(dev);
720 struct drm_device *drm_dev = priv->ddev;
721
722 drm_mode_config_helper_resume(drm_dev);
723
724 return omap_gem_resume(drm_dev);
725}
726#endif
727
728static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume);
729
730static struct platform_driver pdev = {
731 .driver = {
732 .name = "omapdrm",
733 .pm = &omapdrm_pm_ops,
734 },
735 .probe = pdev_probe,
736 .remove = pdev_remove,
737};
738
739static struct platform_driver * const drivers[] = {
740 &omap_dmm_driver,
741 &pdev,
742};
743
744static int __init omap_drm_init(void)
745{
746 DBG("init");
747
748 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
749}
750
751static void __exit omap_drm_fini(void)
752{
753 DBG("fini");
754
755 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
756}
757
758/* need late_initcall() so we load after dss_driver's are loaded */
759late_initcall(omap_drm_init);
760module_exit(omap_drm_fini);
761
762MODULE_AUTHOR("Rob Clark <rob@ti.com>");
763MODULE_DESCRIPTION("OMAP DRM Display Driver");
764MODULE_ALIAS("platform:" DRIVER_NAME);
765MODULE_LICENSE("GPL v2");
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
33static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS;
34
35MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs");
36module_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
50static 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
58static 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
63static 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
75static 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}
89static 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
97static 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
121cleanup:
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
131static 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
320static 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
330static 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
350static 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
364static 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
374static 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
397static 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
421static 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
442static 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 */
465static 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
513static 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
544static 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 */
561static 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 drm_modeset_lock_all(dev);
592 ret = drm_fb_helper_restore_fbdev_mode(priv->fbdev);
593 drm_modeset_unlock_all(dev);
594 if (ret)
595 DBG("failed to restore crtc mode");
596}
597
598static void dev_preclose(struct drm_device *dev, struct drm_file *file)
599{
600 DBG("preclose: dev=%p", dev);
601}
602
603static void dev_postclose(struct drm_device *dev, struct drm_file *file)
604{
605 DBG("postclose: dev=%p, file=%p", dev, file);
606}
607
608static const struct vm_operations_struct omap_gem_vm_ops = {
609 .fault = omap_gem_fault,
610 .open = drm_gem_vm_open,
611 .close = drm_gem_vm_close,
612};
613
614static const struct file_operations omapdriver_fops = {
615 .owner = THIS_MODULE,
616 .open = drm_open,
617 .unlocked_ioctl = drm_ioctl,
618 .release = drm_release,
619 .mmap = omap_gem_mmap,
620 .poll = drm_poll,
621 .read = drm_read,
622 .llseek = noop_llseek,
623};
624
625static struct drm_driver omap_drm_driver = {
626 .driver_features =
627 DRIVER_HAVE_IRQ | DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
628 .load = dev_load,
629 .unload = dev_unload,
630 .open = dev_open,
631 .lastclose = dev_lastclose,
632 .preclose = dev_preclose,
633 .postclose = dev_postclose,
634 .get_vblank_counter = drm_vblank_count,
635 .enable_vblank = omap_irq_enable_vblank,
636 .disable_vblank = omap_irq_disable_vblank,
637 .irq_preinstall = omap_irq_preinstall,
638 .irq_postinstall = omap_irq_postinstall,
639 .irq_uninstall = omap_irq_uninstall,
640 .irq_handler = omap_irq_handler,
641#ifdef CONFIG_DEBUG_FS
642 .debugfs_init = omap_debugfs_init,
643 .debugfs_cleanup = omap_debugfs_cleanup,
644#endif
645 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
646 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
647 .gem_prime_export = omap_gem_prime_export,
648 .gem_prime_import = omap_gem_prime_import,
649 .gem_free_object = omap_gem_free_object,
650 .gem_vm_ops = &omap_gem_vm_ops,
651 .dumb_create = omap_gem_dumb_create,
652 .dumb_map_offset = omap_gem_dumb_map_offset,
653 .dumb_destroy = drm_gem_dumb_destroy,
654 .ioctls = ioctls,
655 .num_ioctls = DRM_OMAP_NUM_IOCTLS,
656 .fops = &omapdriver_fops,
657 .name = DRIVER_NAME,
658 .desc = DRIVER_DESC,
659 .date = DRIVER_DATE,
660 .major = DRIVER_MAJOR,
661 .minor = DRIVER_MINOR,
662 .patchlevel = DRIVER_PATCHLEVEL,
663};
664
665static int pdev_suspend(struct platform_device *pDevice, pm_message_t state)
666{
667 DBG("");
668 return 0;
669}
670
671static int pdev_resume(struct platform_device *device)
672{
673 DBG("");
674 return 0;
675}
676
677static void pdev_shutdown(struct platform_device *device)
678{
679 DBG("");
680}
681
682static int pdev_probe(struct platform_device *device)
683{
684 int r;
685
686 if (omapdss_is_initialized() == false)
687 return -EPROBE_DEFER;
688
689 omap_crtc_pre_init();
690
691 r = omap_connect_dssdevs();
692 if (r) {
693 omap_crtc_pre_uninit();
694 return r;
695 }
696
697 DBG("%s", device->name);
698 return drm_platform_init(&omap_drm_driver, device);
699}
700
701static int pdev_remove(struct platform_device *device)
702{
703 DBG("");
704
705 drm_put_dev(platform_get_drvdata(device));
706
707 omap_disconnect_dssdevs();
708 omap_crtc_pre_uninit();
709
710 return 0;
711}
712
713#ifdef CONFIG_PM
714static const struct dev_pm_ops omapdrm_pm_ops = {
715 .resume = omap_gem_resume,
716};
717#endif
718
719static struct platform_driver pdev = {
720 .driver = {
721 .name = DRIVER_NAME,
722 .owner = THIS_MODULE,
723#ifdef CONFIG_PM
724 .pm = &omapdrm_pm_ops,
725#endif
726 },
727 .probe = pdev_probe,
728 .remove = pdev_remove,
729 .suspend = pdev_suspend,
730 .resume = pdev_resume,
731 .shutdown = pdev_shutdown,
732};
733
734static int __init omap_drm_init(void)
735{
736 int r;
737
738 DBG("init");
739
740 r = platform_driver_register(&omap_dmm_driver);
741 if (r) {
742 pr_err("DMM driver registration failed\n");
743 return r;
744 }
745
746 r = platform_driver_register(&pdev);
747 if (r) {
748 pr_err("omapdrm driver registration failed\n");
749 platform_driver_unregister(&omap_dmm_driver);
750 return r;
751 }
752
753 return 0;
754}
755
756static void __exit omap_drm_fini(void)
757{
758 DBG("fini");
759
760 platform_driver_unregister(&pdev);
761
762 platform_driver_unregister(&omap_dmm_driver);
763}
764
765/* need late_initcall() so we load after dss_driver's are loaded */
766late_initcall(omap_drm_init);
767module_exit(omap_drm_fini);
768
769MODULE_AUTHOR("Rob Clark <rob@ti.com>");
770MODULE_DESCRIPTION("OMAP DRM Display Driver");
771MODULE_ALIAS("platform:" DRIVER_NAME);
772MODULE_LICENSE("GPL v2");