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1/*
2 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
3 * Authors:
4 * Inki Dae <inki.dae@samsung.com>
5 * Joonyoung Shim <jy0922.shim@samsung.com>
6 * Seung-Woo Kim <sw0312.kim@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/pm_runtime.h>
15#include <drm/drmP.h>
16#include <drm/drm_atomic.h>
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_crtc_helper.h>
19
20#include <linux/component.h>
21
22#include <drm/exynos_drm.h>
23
24#include "exynos_drm_drv.h"
25#include "exynos_drm_crtc.h"
26#include "exynos_drm_fbdev.h"
27#include "exynos_drm_fb.h"
28#include "exynos_drm_gem.h"
29#include "exynos_drm_plane.h"
30#include "exynos_drm_vidi.h"
31#include "exynos_drm_g2d.h"
32#include "exynos_drm_ipp.h"
33#include "exynos_drm_iommu.h"
34
35#define DRIVER_NAME "exynos"
36#define DRIVER_DESC "Samsung SoC DRM"
37#define DRIVER_DATE "20110530"
38#define DRIVER_MAJOR 1
39#define DRIVER_MINOR 0
40
41struct exynos_atomic_commit {
42 struct work_struct work;
43 struct drm_device *dev;
44 struct drm_atomic_state *state;
45 u32 crtcs;
46};
47
48static void exynos_atomic_wait_for_commit(struct drm_atomic_state *state)
49{
50 struct drm_crtc_state *crtc_state;
51 struct drm_crtc *crtc;
52 int i, ret;
53
54 for_each_crtc_in_state(state, crtc, crtc_state, i) {
55 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
56
57 if (!crtc->state->enable)
58 continue;
59
60 ret = drm_crtc_vblank_get(crtc);
61 if (ret)
62 continue;
63
64 exynos_drm_crtc_wait_pending_update(exynos_crtc);
65 drm_crtc_vblank_put(crtc);
66 }
67}
68
69static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit)
70{
71 struct drm_device *dev = commit->dev;
72 struct exynos_drm_private *priv = dev->dev_private;
73 struct drm_atomic_state *state = commit->state;
74 struct drm_plane *plane;
75 struct drm_crtc *crtc;
76 struct drm_plane_state *plane_state;
77 struct drm_crtc_state *crtc_state;
78 int i;
79
80 drm_atomic_helper_commit_modeset_disables(dev, state);
81
82 drm_atomic_helper_commit_modeset_enables(dev, state);
83
84 /*
85 * Exynos can't update planes with CRTCs and encoders disabled,
86 * its updates routines, specially for FIMD, requires the clocks
87 * to be enabled. So it is necessary to handle the modeset operations
88 * *before* the commit_planes() step, this way it will always
89 * have the relevant clocks enabled to perform the update.
90 */
91
92 for_each_crtc_in_state(state, crtc, crtc_state, i) {
93 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
94
95 atomic_set(&exynos_crtc->pending_update, 0);
96 }
97
98 for_each_plane_in_state(state, plane, plane_state, i) {
99 struct exynos_drm_crtc *exynos_crtc =
100 to_exynos_crtc(plane->crtc);
101
102 if (!plane->crtc)
103 continue;
104
105 atomic_inc(&exynos_crtc->pending_update);
106 }
107
108 drm_atomic_helper_commit_planes(dev, state, false);
109
110 exynos_atomic_wait_for_commit(state);
111
112 drm_atomic_helper_cleanup_planes(dev, state);
113
114 drm_atomic_state_free(state);
115
116 spin_lock(&priv->lock);
117 priv->pending &= ~commit->crtcs;
118 spin_unlock(&priv->lock);
119
120 wake_up_all(&priv->wait);
121
122 kfree(commit);
123}
124
125static void exynos_drm_atomic_work(struct work_struct *work)
126{
127 struct exynos_atomic_commit *commit = container_of(work,
128 struct exynos_atomic_commit, work);
129
130 exynos_atomic_commit_complete(commit);
131}
132
133static struct device *exynos_drm_get_dma_device(void);
134
135static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
136{
137 struct exynos_drm_private *private;
138 struct drm_encoder *encoder;
139 unsigned int clone_mask;
140 int cnt, ret;
141
142 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
143 if (!private)
144 return -ENOMEM;
145
146 init_waitqueue_head(&private->wait);
147 spin_lock_init(&private->lock);
148
149 dev_set_drvdata(dev->dev, dev);
150 dev->dev_private = (void *)private;
151
152 /* the first real CRTC device is used for all dma mapping operations */
153 private->dma_dev = exynos_drm_get_dma_device();
154 if (!private->dma_dev) {
155 DRM_ERROR("no device found for DMA mapping operations.\n");
156 ret = -ENODEV;
157 goto err_free_private;
158 }
159 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
160 dev_name(private->dma_dev));
161
162 /*
163 * create mapping to manage iommu table and set a pointer to iommu
164 * mapping structure to iommu_mapping of private data.
165 * also this iommu_mapping can be used to check if iommu is supported
166 * or not.
167 */
168 ret = drm_create_iommu_mapping(dev);
169 if (ret < 0) {
170 DRM_ERROR("failed to create iommu mapping.\n");
171 goto err_free_private;
172 }
173
174 drm_mode_config_init(dev);
175
176 exynos_drm_mode_config_init(dev);
177
178 /* setup possible_clones. */
179 cnt = 0;
180 clone_mask = 0;
181 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
182 clone_mask |= (1 << (cnt++));
183
184 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
185 encoder->possible_clones = clone_mask;
186
187 platform_set_drvdata(dev->platformdev, dev);
188
189 /* Try to bind all sub drivers. */
190 ret = component_bind_all(dev->dev, dev);
191 if (ret)
192 goto err_mode_config_cleanup;
193
194 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
195 if (ret)
196 goto err_unbind_all;
197
198 /* Probe non kms sub drivers and virtual display driver. */
199 ret = exynos_drm_device_subdrv_probe(dev);
200 if (ret)
201 goto err_cleanup_vblank;
202
203 drm_mode_config_reset(dev);
204
205 /*
206 * enable drm irq mode.
207 * - with irq_enabled = true, we can use the vblank feature.
208 *
209 * P.S. note that we wouldn't use drm irq handler but
210 * just specific driver own one instead because
211 * drm framework supports only one irq handler.
212 */
213 dev->irq_enabled = true;
214
215 /*
216 * with vblank_disable_allowed = true, vblank interrupt will be disabled
217 * by drm timer once a current process gives up ownership of
218 * vblank event.(after drm_vblank_put function is called)
219 */
220 dev->vblank_disable_allowed = true;
221
222 /* init kms poll for handling hpd */
223 drm_kms_helper_poll_init(dev);
224
225 /* force connectors detection */
226 drm_helper_hpd_irq_event(dev);
227
228 return 0;
229
230err_cleanup_vblank:
231 drm_vblank_cleanup(dev);
232err_unbind_all:
233 component_unbind_all(dev->dev, dev);
234err_mode_config_cleanup:
235 drm_mode_config_cleanup(dev);
236 drm_release_iommu_mapping(dev);
237err_free_private:
238 kfree(private);
239
240 return ret;
241}
242
243static int exynos_drm_unload(struct drm_device *dev)
244{
245 exynos_drm_device_subdrv_remove(dev);
246
247 exynos_drm_fbdev_fini(dev);
248 drm_kms_helper_poll_fini(dev);
249
250 drm_vblank_cleanup(dev);
251 component_unbind_all(dev->dev, dev);
252 drm_mode_config_cleanup(dev);
253 drm_release_iommu_mapping(dev);
254
255 kfree(dev->dev_private);
256 dev->dev_private = NULL;
257
258 return 0;
259}
260
261static int commit_is_pending(struct exynos_drm_private *priv, u32 crtcs)
262{
263 bool pending;
264
265 spin_lock(&priv->lock);
266 pending = priv->pending & crtcs;
267 spin_unlock(&priv->lock);
268
269 return pending;
270}
271
272int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state,
273 bool async)
274{
275 struct exynos_drm_private *priv = dev->dev_private;
276 struct exynos_atomic_commit *commit;
277 int i, ret;
278
279 commit = kzalloc(sizeof(*commit), GFP_KERNEL);
280 if (!commit)
281 return -ENOMEM;
282
283 ret = drm_atomic_helper_prepare_planes(dev, state);
284 if (ret) {
285 kfree(commit);
286 return ret;
287 }
288
289 /* This is the point of no return */
290
291 INIT_WORK(&commit->work, exynos_drm_atomic_work);
292 commit->dev = dev;
293 commit->state = state;
294
295 /* Wait until all affected CRTCs have completed previous commits and
296 * mark them as pending.
297 */
298 for (i = 0; i < dev->mode_config.num_crtc; ++i) {
299 if (state->crtcs[i])
300 commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]);
301 }
302
303 wait_event(priv->wait, !commit_is_pending(priv, commit->crtcs));
304
305 spin_lock(&priv->lock);
306 priv->pending |= commit->crtcs;
307 spin_unlock(&priv->lock);
308
309 drm_atomic_helper_swap_state(dev, state);
310
311 if (async)
312 schedule_work(&commit->work);
313 else
314 exynos_atomic_commit_complete(commit);
315
316 return 0;
317}
318
319static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
320{
321 struct drm_exynos_file_private *file_priv;
322 int ret;
323
324 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
325 if (!file_priv)
326 return -ENOMEM;
327
328 file->driver_priv = file_priv;
329
330 ret = exynos_drm_subdrv_open(dev, file);
331 if (ret)
332 goto err_file_priv_free;
333
334 return ret;
335
336err_file_priv_free:
337 kfree(file_priv);
338 file->driver_priv = NULL;
339 return ret;
340}
341
342static void exynos_drm_preclose(struct drm_device *dev,
343 struct drm_file *file)
344{
345 struct drm_crtc *crtc;
346
347 exynos_drm_subdrv_close(dev, file);
348
349 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
350 exynos_drm_crtc_cancel_page_flip(crtc, file);
351}
352
353static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
354{
355 kfree(file->driver_priv);
356 file->driver_priv = NULL;
357}
358
359static void exynos_drm_lastclose(struct drm_device *dev)
360{
361 exynos_drm_fbdev_restore_mode(dev);
362}
363
364static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
365 .fault = exynos_drm_gem_fault,
366 .open = drm_gem_vm_open,
367 .close = drm_gem_vm_close,
368};
369
370static const struct drm_ioctl_desc exynos_ioctls[] = {
371 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
372 DRM_AUTH | DRM_RENDER_ALLOW),
373 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
374 DRM_AUTH | DRM_RENDER_ALLOW),
375 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
376 DRM_RENDER_ALLOW),
377 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
378 DRM_AUTH),
379 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
380 DRM_AUTH | DRM_RENDER_ALLOW),
381 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
382 DRM_AUTH | DRM_RENDER_ALLOW),
383 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
384 DRM_AUTH | DRM_RENDER_ALLOW),
385 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property,
386 DRM_AUTH | DRM_RENDER_ALLOW),
387 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property,
388 DRM_AUTH | DRM_RENDER_ALLOW),
389 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf,
390 DRM_AUTH | DRM_RENDER_ALLOW),
391 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl,
392 DRM_AUTH | DRM_RENDER_ALLOW),
393};
394
395static const struct file_operations exynos_drm_driver_fops = {
396 .owner = THIS_MODULE,
397 .open = drm_open,
398 .mmap = exynos_drm_gem_mmap,
399 .poll = drm_poll,
400 .read = drm_read,
401 .unlocked_ioctl = drm_ioctl,
402#ifdef CONFIG_COMPAT
403 .compat_ioctl = drm_compat_ioctl,
404#endif
405 .release = drm_release,
406};
407
408static struct drm_driver exynos_drm_driver = {
409 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
410 | DRIVER_ATOMIC | DRIVER_RENDER,
411 .load = exynos_drm_load,
412 .unload = exynos_drm_unload,
413 .open = exynos_drm_open,
414 .preclose = exynos_drm_preclose,
415 .lastclose = exynos_drm_lastclose,
416 .postclose = exynos_drm_postclose,
417 .set_busid = drm_platform_set_busid,
418 .get_vblank_counter = drm_vblank_no_hw_counter,
419 .enable_vblank = exynos_drm_crtc_enable_vblank,
420 .disable_vblank = exynos_drm_crtc_disable_vblank,
421 .gem_free_object = exynos_drm_gem_free_object,
422 .gem_vm_ops = &exynos_drm_gem_vm_ops,
423 .dumb_create = exynos_drm_gem_dumb_create,
424 .dumb_map_offset = exynos_drm_gem_dumb_map_offset,
425 .dumb_destroy = drm_gem_dumb_destroy,
426 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
427 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
428 .gem_prime_export = drm_gem_prime_export,
429 .gem_prime_import = drm_gem_prime_import,
430 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
431 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table,
432 .gem_prime_vmap = exynos_drm_gem_prime_vmap,
433 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap,
434 .ioctls = exynos_ioctls,
435 .num_ioctls = ARRAY_SIZE(exynos_ioctls),
436 .fops = &exynos_drm_driver_fops,
437 .name = DRIVER_NAME,
438 .desc = DRIVER_DESC,
439 .date = DRIVER_DATE,
440 .major = DRIVER_MAJOR,
441 .minor = DRIVER_MINOR,
442};
443
444#ifdef CONFIG_PM_SLEEP
445static int exynos_drm_suspend(struct device *dev)
446{
447 struct drm_device *drm_dev = dev_get_drvdata(dev);
448 struct drm_connector *connector;
449
450 if (pm_runtime_suspended(dev) || !drm_dev)
451 return 0;
452
453 drm_modeset_lock_all(drm_dev);
454 drm_for_each_connector(connector, drm_dev) {
455 int old_dpms = connector->dpms;
456
457 if (connector->funcs->dpms)
458 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
459
460 /* Set the old mode back to the connector for resume */
461 connector->dpms = old_dpms;
462 }
463 drm_modeset_unlock_all(drm_dev);
464
465 return 0;
466}
467
468static int exynos_drm_resume(struct device *dev)
469{
470 struct drm_device *drm_dev = dev_get_drvdata(dev);
471 struct drm_connector *connector;
472
473 if (pm_runtime_suspended(dev) || !drm_dev)
474 return 0;
475
476 drm_modeset_lock_all(drm_dev);
477 drm_for_each_connector(connector, drm_dev) {
478 if (connector->funcs->dpms) {
479 int dpms = connector->dpms;
480
481 connector->dpms = DRM_MODE_DPMS_OFF;
482 connector->funcs->dpms(connector, dpms);
483 }
484 }
485 drm_modeset_unlock_all(drm_dev);
486
487 return 0;
488}
489#endif
490
491static const struct dev_pm_ops exynos_drm_pm_ops = {
492 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
493};
494
495/* forward declaration */
496static struct platform_driver exynos_drm_platform_driver;
497
498struct exynos_drm_driver_info {
499 struct platform_driver *driver;
500 unsigned int flags;
501};
502
503#define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */
504#define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */
505#define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */
506
507#define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
508
509/*
510 * Connector drivers should not be placed before associated crtc drivers,
511 * because connector requires pipe number of its crtc during initialization.
512 */
513static struct exynos_drm_driver_info exynos_drm_drivers[] = {
514 {
515 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
516 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
517 }, {
518 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
519 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
520 }, {
521 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
522 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
523 }, {
524 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
525 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
526 }, {
527 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
528 DRM_COMPONENT_DRIVER
529 }, {
530 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
531 DRM_COMPONENT_DRIVER
532 }, {
533 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
534 DRM_COMPONENT_DRIVER
535 }, {
536 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
537 DRM_COMPONENT_DRIVER
538 }, {
539 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
540 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
541 }, {
542 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
543 }, {
544 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
545 }, {
546 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
547 }, {
548 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
549 }, {
550 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP),
551 DRM_VIRTUAL_DEVICE
552 }, {
553 &exynos_drm_platform_driver,
554 DRM_VIRTUAL_DEVICE
555 }
556};
557
558static int compare_dev(struct device *dev, void *data)
559{
560 return dev == (struct device *)data;
561}
562
563static struct component_match *exynos_drm_match_add(struct device *dev)
564{
565 struct component_match *match = NULL;
566 int i;
567
568 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
569 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
570 struct device *p = NULL, *d;
571
572 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
573 continue;
574
575 while ((d = bus_find_device(&platform_bus_type, p,
576 &info->driver->driver,
577 (void *)platform_bus_type.match))) {
578 put_device(p);
579 component_match_add(dev, &match, compare_dev, d);
580 p = d;
581 }
582 put_device(p);
583 }
584
585 return match ?: ERR_PTR(-ENODEV);
586}
587
588static int exynos_drm_bind(struct device *dev)
589{
590 return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
591}
592
593static void exynos_drm_unbind(struct device *dev)
594{
595 drm_put_dev(dev_get_drvdata(dev));
596}
597
598static const struct component_master_ops exynos_drm_ops = {
599 .bind = exynos_drm_bind,
600 .unbind = exynos_drm_unbind,
601};
602
603static int exynos_drm_platform_probe(struct platform_device *pdev)
604{
605 struct component_match *match;
606
607 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
608 exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
609
610 match = exynos_drm_match_add(&pdev->dev);
611 if (IS_ERR(match))
612 return PTR_ERR(match);
613
614 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
615 match);
616}
617
618static int exynos_drm_platform_remove(struct platform_device *pdev)
619{
620 component_master_del(&pdev->dev, &exynos_drm_ops);
621 return 0;
622}
623
624static struct platform_driver exynos_drm_platform_driver = {
625 .probe = exynos_drm_platform_probe,
626 .remove = exynos_drm_platform_remove,
627 .driver = {
628 .name = "exynos-drm",
629 .pm = &exynos_drm_pm_ops,
630 },
631};
632
633static struct device *exynos_drm_get_dma_device(void)
634{
635 int i;
636
637 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
638 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
639 struct device *dev;
640
641 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
642 continue;
643
644 while ((dev = bus_find_device(&platform_bus_type, NULL,
645 &info->driver->driver,
646 (void *)platform_bus_type.match))) {
647 put_device(dev);
648 return dev;
649 }
650 }
651 return NULL;
652}
653
654static void exynos_drm_unregister_devices(void)
655{
656 int i;
657
658 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
659 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
660 struct device *dev;
661
662 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
663 continue;
664
665 while ((dev = bus_find_device(&platform_bus_type, NULL,
666 &info->driver->driver,
667 (void *)platform_bus_type.match))) {
668 put_device(dev);
669 platform_device_unregister(to_platform_device(dev));
670 }
671 }
672}
673
674static int exynos_drm_register_devices(void)
675{
676 struct platform_device *pdev;
677 int i;
678
679 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
680 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
681
682 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
683 continue;
684
685 pdev = platform_device_register_simple(
686 info->driver->driver.name, -1, NULL, 0);
687 if (IS_ERR(pdev))
688 goto fail;
689 }
690
691 return 0;
692fail:
693 exynos_drm_unregister_devices();
694 return PTR_ERR(pdev);
695}
696
697static void exynos_drm_unregister_drivers(void)
698{
699 int i;
700
701 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
702 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
703
704 if (!info->driver)
705 continue;
706
707 platform_driver_unregister(info->driver);
708 }
709}
710
711static int exynos_drm_register_drivers(void)
712{
713 int i, ret;
714
715 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
716 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
717
718 if (!info->driver)
719 continue;
720
721 ret = platform_driver_register(info->driver);
722 if (ret)
723 goto fail;
724 }
725 return 0;
726fail:
727 exynos_drm_unregister_drivers();
728 return ret;
729}
730
731static int exynos_drm_init(void)
732{
733 int ret;
734
735 ret = exynos_drm_register_devices();
736 if (ret)
737 return ret;
738
739 ret = exynos_drm_register_drivers();
740 if (ret)
741 goto err_unregister_pdevs;
742
743 return 0;
744
745err_unregister_pdevs:
746 exynos_drm_unregister_devices();
747
748 return ret;
749}
750
751static void exynos_drm_exit(void)
752{
753 exynos_drm_unregister_drivers();
754 exynos_drm_unregister_devices();
755}
756
757module_init(exynos_drm_init);
758module_exit(exynos_drm_exit);
759
760MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
761MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
762MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
763MODULE_DESCRIPTION("Samsung SoC DRM Driver");
764MODULE_LICENSE("GPL");
1/*
2 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
3 * Authors:
4 * Inki Dae <inki.dae@samsung.com>
5 * Joonyoung Shim <jy0922.shim@samsung.com>
6 * Seung-Woo Kim <sw0312.kim@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/pm_runtime.h>
15#include <drm/drmP.h>
16#include <drm/drm_atomic.h>
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_crtc_helper.h>
19
20#include <linux/component.h>
21
22#include <drm/exynos_drm.h>
23
24#include "exynos_drm_drv.h"
25#include "exynos_drm_crtc.h"
26#include "exynos_drm_fbdev.h"
27#include "exynos_drm_fb.h"
28#include "exynos_drm_gem.h"
29#include "exynos_drm_plane.h"
30#include "exynos_drm_vidi.h"
31#include "exynos_drm_g2d.h"
32#include "exynos_drm_ipp.h"
33#include "exynos_drm_iommu.h"
34
35#define DRIVER_NAME "exynos"
36#define DRIVER_DESC "Samsung SoC DRM"
37#define DRIVER_DATE "20110530"
38#define DRIVER_MAJOR 1
39#define DRIVER_MINOR 0
40
41struct exynos_atomic_commit {
42 struct work_struct work;
43 struct drm_device *dev;
44 struct drm_atomic_state *state;
45 u32 crtcs;
46};
47
48static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit)
49{
50 struct drm_device *dev = commit->dev;
51 struct exynos_drm_private *priv = dev->dev_private;
52 struct drm_atomic_state *state = commit->state;
53
54 drm_atomic_helper_commit_modeset_disables(dev, state);
55
56 drm_atomic_helper_commit_modeset_enables(dev, state);
57
58 /*
59 * Exynos can't update planes with CRTCs and encoders disabled,
60 * its updates routines, specially for FIMD, requires the clocks
61 * to be enabled. So it is necessary to handle the modeset operations
62 * *before* the commit_planes() step, this way it will always
63 * have the relevant clocks enabled to perform the update.
64 */
65
66 drm_atomic_helper_commit_planes(dev, state, 0);
67
68 drm_atomic_helper_wait_for_vblanks(dev, state);
69
70 drm_atomic_helper_cleanup_planes(dev, state);
71
72 drm_atomic_state_put(state);
73
74 spin_lock(&priv->lock);
75 priv->pending &= ~commit->crtcs;
76 spin_unlock(&priv->lock);
77
78 wake_up_all(&priv->wait);
79
80 kfree(commit);
81}
82
83static void exynos_drm_atomic_work(struct work_struct *work)
84{
85 struct exynos_atomic_commit *commit = container_of(work,
86 struct exynos_atomic_commit, work);
87
88 exynos_atomic_commit_complete(commit);
89}
90
91static struct device *exynos_drm_get_dma_device(void);
92
93static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
94{
95 struct exynos_drm_private *private;
96 struct drm_encoder *encoder;
97 unsigned int clone_mask;
98 int cnt, ret;
99
100 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
101 if (!private)
102 return -ENOMEM;
103
104 init_waitqueue_head(&private->wait);
105 spin_lock_init(&private->lock);
106
107 dev_set_drvdata(dev->dev, dev);
108 dev->dev_private = (void *)private;
109
110 /* the first real CRTC device is used for all dma mapping operations */
111 private->dma_dev = exynos_drm_get_dma_device();
112 if (!private->dma_dev) {
113 DRM_ERROR("no device found for DMA mapping operations.\n");
114 ret = -ENODEV;
115 goto err_free_private;
116 }
117 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
118 dev_name(private->dma_dev));
119
120 /* create common IOMMU mapping for all devices attached to Exynos DRM */
121 ret = drm_create_iommu_mapping(dev);
122 if (ret < 0) {
123 DRM_ERROR("failed to create iommu mapping.\n");
124 goto err_free_private;
125 }
126
127 drm_mode_config_init(dev);
128
129 exynos_drm_mode_config_init(dev);
130
131 /* setup possible_clones. */
132 cnt = 0;
133 clone_mask = 0;
134 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
135 clone_mask |= (1 << (cnt++));
136
137 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
138 encoder->possible_clones = clone_mask;
139
140 platform_set_drvdata(dev->platformdev, dev);
141
142 /* Try to bind all sub drivers. */
143 ret = component_bind_all(dev->dev, dev);
144 if (ret)
145 goto err_mode_config_cleanup;
146
147 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
148 if (ret)
149 goto err_unbind_all;
150
151 /* Probe non kms sub drivers and virtual display driver. */
152 ret = exynos_drm_device_subdrv_probe(dev);
153 if (ret)
154 goto err_cleanup_vblank;
155
156 drm_mode_config_reset(dev);
157
158 /*
159 * enable drm irq mode.
160 * - with irq_enabled = true, we can use the vblank feature.
161 *
162 * P.S. note that we wouldn't use drm irq handler but
163 * just specific driver own one instead because
164 * drm framework supports only one irq handler.
165 */
166 dev->irq_enabled = true;
167
168 /* init kms poll for handling hpd */
169 drm_kms_helper_poll_init(dev);
170
171 /* force connectors detection */
172 drm_helper_hpd_irq_event(dev);
173
174 return 0;
175
176err_cleanup_vblank:
177 drm_vblank_cleanup(dev);
178err_unbind_all:
179 component_unbind_all(dev->dev, dev);
180err_mode_config_cleanup:
181 drm_mode_config_cleanup(dev);
182 drm_release_iommu_mapping(dev);
183err_free_private:
184 kfree(private);
185
186 return ret;
187}
188
189static int exynos_drm_unload(struct drm_device *dev)
190{
191 exynos_drm_device_subdrv_remove(dev);
192
193 exynos_drm_fbdev_fini(dev);
194 drm_kms_helper_poll_fini(dev);
195
196 drm_vblank_cleanup(dev);
197 component_unbind_all(dev->dev, dev);
198 drm_mode_config_cleanup(dev);
199 drm_release_iommu_mapping(dev);
200
201 kfree(dev->dev_private);
202 dev->dev_private = NULL;
203
204 return 0;
205}
206
207static int commit_is_pending(struct exynos_drm_private *priv, u32 crtcs)
208{
209 bool pending;
210
211 spin_lock(&priv->lock);
212 pending = priv->pending & crtcs;
213 spin_unlock(&priv->lock);
214
215 return pending;
216}
217
218int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state,
219 bool nonblock)
220{
221 struct exynos_drm_private *priv = dev->dev_private;
222 struct exynos_atomic_commit *commit;
223 struct drm_crtc *crtc;
224 struct drm_crtc_state *crtc_state;
225 int i, ret;
226
227 commit = kzalloc(sizeof(*commit), GFP_KERNEL);
228 if (!commit)
229 return -ENOMEM;
230
231 ret = drm_atomic_helper_prepare_planes(dev, state);
232 if (ret) {
233 kfree(commit);
234 return ret;
235 }
236
237 /* This is the point of no return */
238
239 INIT_WORK(&commit->work, exynos_drm_atomic_work);
240 commit->dev = dev;
241 commit->state = state;
242
243 /* Wait until all affected CRTCs have completed previous commits and
244 * mark them as pending.
245 */
246 for_each_crtc_in_state(state, crtc, crtc_state, i)
247 commit->crtcs |= drm_crtc_mask(crtc);
248
249 wait_event(priv->wait, !commit_is_pending(priv, commit->crtcs));
250
251 spin_lock(&priv->lock);
252 priv->pending |= commit->crtcs;
253 spin_unlock(&priv->lock);
254
255 drm_atomic_helper_swap_state(state, true);
256
257 drm_atomic_state_get(state);
258 if (nonblock)
259 schedule_work(&commit->work);
260 else
261 exynos_atomic_commit_complete(commit);
262
263 return 0;
264}
265
266int exynos_atomic_check(struct drm_device *dev,
267 struct drm_atomic_state *state)
268{
269 int ret;
270
271 ret = drm_atomic_helper_check_modeset(dev, state);
272 if (ret)
273 return ret;
274
275 ret = drm_atomic_normalize_zpos(dev, state);
276 if (ret)
277 return ret;
278
279 ret = drm_atomic_helper_check_planes(dev, state);
280 if (ret)
281 return ret;
282
283 return ret;
284}
285
286static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
287{
288 struct drm_exynos_file_private *file_priv;
289 int ret;
290
291 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
292 if (!file_priv)
293 return -ENOMEM;
294
295 file->driver_priv = file_priv;
296
297 ret = exynos_drm_subdrv_open(dev, file);
298 if (ret)
299 goto err_file_priv_free;
300
301 return ret;
302
303err_file_priv_free:
304 kfree(file_priv);
305 file->driver_priv = NULL;
306 return ret;
307}
308
309static void exynos_drm_preclose(struct drm_device *dev,
310 struct drm_file *file)
311{
312 struct drm_crtc *crtc;
313
314 exynos_drm_subdrv_close(dev, file);
315
316 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
317 exynos_drm_crtc_cancel_page_flip(crtc, file);
318}
319
320static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
321{
322 kfree(file->driver_priv);
323 file->driver_priv = NULL;
324}
325
326static void exynos_drm_lastclose(struct drm_device *dev)
327{
328 exynos_drm_fbdev_restore_mode(dev);
329}
330
331static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
332 .fault = exynos_drm_gem_fault,
333 .open = drm_gem_vm_open,
334 .close = drm_gem_vm_close,
335};
336
337static const struct drm_ioctl_desc exynos_ioctls[] = {
338 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
339 DRM_AUTH | DRM_RENDER_ALLOW),
340 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
341 DRM_AUTH | DRM_RENDER_ALLOW),
342 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
343 DRM_RENDER_ALLOW),
344 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
345 DRM_AUTH),
346 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
347 DRM_AUTH | DRM_RENDER_ALLOW),
348 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
349 DRM_AUTH | DRM_RENDER_ALLOW),
350 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
351 DRM_AUTH | DRM_RENDER_ALLOW),
352 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property,
353 DRM_AUTH | DRM_RENDER_ALLOW),
354 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property,
355 DRM_AUTH | DRM_RENDER_ALLOW),
356 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf,
357 DRM_AUTH | DRM_RENDER_ALLOW),
358 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl,
359 DRM_AUTH | DRM_RENDER_ALLOW),
360};
361
362static const struct file_operations exynos_drm_driver_fops = {
363 .owner = THIS_MODULE,
364 .open = drm_open,
365 .mmap = exynos_drm_gem_mmap,
366 .poll = drm_poll,
367 .read = drm_read,
368 .unlocked_ioctl = drm_ioctl,
369 .compat_ioctl = drm_compat_ioctl,
370 .release = drm_release,
371};
372
373static struct drm_driver exynos_drm_driver = {
374 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
375 | DRIVER_ATOMIC | DRIVER_RENDER,
376 .load = exynos_drm_load,
377 .unload = exynos_drm_unload,
378 .open = exynos_drm_open,
379 .preclose = exynos_drm_preclose,
380 .lastclose = exynos_drm_lastclose,
381 .postclose = exynos_drm_postclose,
382 .get_vblank_counter = drm_vblank_no_hw_counter,
383 .enable_vblank = exynos_drm_crtc_enable_vblank,
384 .disable_vblank = exynos_drm_crtc_disable_vblank,
385 .gem_free_object_unlocked = exynos_drm_gem_free_object,
386 .gem_vm_ops = &exynos_drm_gem_vm_ops,
387 .dumb_create = exynos_drm_gem_dumb_create,
388 .dumb_map_offset = exynos_drm_gem_dumb_map_offset,
389 .dumb_destroy = drm_gem_dumb_destroy,
390 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
391 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
392 .gem_prime_export = drm_gem_prime_export,
393 .gem_prime_import = drm_gem_prime_import,
394 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
395 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table,
396 .gem_prime_vmap = exynos_drm_gem_prime_vmap,
397 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap,
398 .gem_prime_mmap = exynos_drm_gem_prime_mmap,
399 .ioctls = exynos_ioctls,
400 .num_ioctls = ARRAY_SIZE(exynos_ioctls),
401 .fops = &exynos_drm_driver_fops,
402 .name = DRIVER_NAME,
403 .desc = DRIVER_DESC,
404 .date = DRIVER_DATE,
405 .major = DRIVER_MAJOR,
406 .minor = DRIVER_MINOR,
407};
408
409#ifdef CONFIG_PM_SLEEP
410static int exynos_drm_suspend(struct device *dev)
411{
412 struct drm_device *drm_dev = dev_get_drvdata(dev);
413 struct drm_connector *connector;
414
415 if (pm_runtime_suspended(dev) || !drm_dev)
416 return 0;
417
418 drm_modeset_lock_all(drm_dev);
419 drm_for_each_connector(connector, drm_dev) {
420 int old_dpms = connector->dpms;
421
422 if (connector->funcs->dpms)
423 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
424
425 /* Set the old mode back to the connector for resume */
426 connector->dpms = old_dpms;
427 }
428 drm_modeset_unlock_all(drm_dev);
429
430 return 0;
431}
432
433static int exynos_drm_resume(struct device *dev)
434{
435 struct drm_device *drm_dev = dev_get_drvdata(dev);
436 struct drm_connector *connector;
437
438 if (pm_runtime_suspended(dev) || !drm_dev)
439 return 0;
440
441 drm_modeset_lock_all(drm_dev);
442 drm_for_each_connector(connector, drm_dev) {
443 if (connector->funcs->dpms) {
444 int dpms = connector->dpms;
445
446 connector->dpms = DRM_MODE_DPMS_OFF;
447 connector->funcs->dpms(connector, dpms);
448 }
449 }
450 drm_modeset_unlock_all(drm_dev);
451
452 return 0;
453}
454#endif
455
456static const struct dev_pm_ops exynos_drm_pm_ops = {
457 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
458};
459
460/* forward declaration */
461static struct platform_driver exynos_drm_platform_driver;
462
463struct exynos_drm_driver_info {
464 struct platform_driver *driver;
465 unsigned int flags;
466};
467
468#define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */
469#define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */
470#define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */
471
472#define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
473
474/*
475 * Connector drivers should not be placed before associated crtc drivers,
476 * because connector requires pipe number of its crtc during initialization.
477 */
478static struct exynos_drm_driver_info exynos_drm_drivers[] = {
479 {
480 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
481 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
482 }, {
483 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
484 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
485 }, {
486 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
487 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
488 }, {
489 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
490 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
491 }, {
492 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
493 DRM_COMPONENT_DRIVER
494 }, {
495 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
496 DRM_COMPONENT_DRIVER
497 }, {
498 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
499 DRM_COMPONENT_DRIVER
500 }, {
501 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
502 DRM_COMPONENT_DRIVER
503 }, {
504 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
505 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
506 }, {
507 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
508 }, {
509 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
510 }, {
511 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
512 }, {
513 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
514 }, {
515 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP),
516 DRM_VIRTUAL_DEVICE
517 }, {
518 &exynos_drm_platform_driver,
519 DRM_VIRTUAL_DEVICE
520 }
521};
522
523static int compare_dev(struct device *dev, void *data)
524{
525 return dev == (struct device *)data;
526}
527
528static struct component_match *exynos_drm_match_add(struct device *dev)
529{
530 struct component_match *match = NULL;
531 int i;
532
533 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
534 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
535 struct device *p = NULL, *d;
536
537 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
538 continue;
539
540 while ((d = bus_find_device(&platform_bus_type, p,
541 &info->driver->driver,
542 (void *)platform_bus_type.match))) {
543 put_device(p);
544 component_match_add(dev, &match, compare_dev, d);
545 p = d;
546 }
547 put_device(p);
548 }
549
550 return match ?: ERR_PTR(-ENODEV);
551}
552
553static int exynos_drm_bind(struct device *dev)
554{
555 return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
556}
557
558static void exynos_drm_unbind(struct device *dev)
559{
560 drm_put_dev(dev_get_drvdata(dev));
561}
562
563static const struct component_master_ops exynos_drm_ops = {
564 .bind = exynos_drm_bind,
565 .unbind = exynos_drm_unbind,
566};
567
568static int exynos_drm_platform_probe(struct platform_device *pdev)
569{
570 struct component_match *match;
571
572 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
573 exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
574
575 match = exynos_drm_match_add(&pdev->dev);
576 if (IS_ERR(match))
577 return PTR_ERR(match);
578
579 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
580 match);
581}
582
583static int exynos_drm_platform_remove(struct platform_device *pdev)
584{
585 component_master_del(&pdev->dev, &exynos_drm_ops);
586 return 0;
587}
588
589static struct platform_driver exynos_drm_platform_driver = {
590 .probe = exynos_drm_platform_probe,
591 .remove = exynos_drm_platform_remove,
592 .driver = {
593 .name = "exynos-drm",
594 .pm = &exynos_drm_pm_ops,
595 },
596};
597
598static struct device *exynos_drm_get_dma_device(void)
599{
600 int i;
601
602 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
603 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
604 struct device *dev;
605
606 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
607 continue;
608
609 while ((dev = bus_find_device(&platform_bus_type, NULL,
610 &info->driver->driver,
611 (void *)platform_bus_type.match))) {
612 put_device(dev);
613 return dev;
614 }
615 }
616 return NULL;
617}
618
619static void exynos_drm_unregister_devices(void)
620{
621 int i;
622
623 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
624 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
625 struct device *dev;
626
627 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
628 continue;
629
630 while ((dev = bus_find_device(&platform_bus_type, NULL,
631 &info->driver->driver,
632 (void *)platform_bus_type.match))) {
633 put_device(dev);
634 platform_device_unregister(to_platform_device(dev));
635 }
636 }
637}
638
639static int exynos_drm_register_devices(void)
640{
641 struct platform_device *pdev;
642 int i;
643
644 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
645 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
646
647 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
648 continue;
649
650 pdev = platform_device_register_simple(
651 info->driver->driver.name, -1, NULL, 0);
652 if (IS_ERR(pdev))
653 goto fail;
654 }
655
656 return 0;
657fail:
658 exynos_drm_unregister_devices();
659 return PTR_ERR(pdev);
660}
661
662static void exynos_drm_unregister_drivers(void)
663{
664 int i;
665
666 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
667 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
668
669 if (!info->driver)
670 continue;
671
672 platform_driver_unregister(info->driver);
673 }
674}
675
676static int exynos_drm_register_drivers(void)
677{
678 int i, ret;
679
680 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
681 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
682
683 if (!info->driver)
684 continue;
685
686 ret = platform_driver_register(info->driver);
687 if (ret)
688 goto fail;
689 }
690 return 0;
691fail:
692 exynos_drm_unregister_drivers();
693 return ret;
694}
695
696static int exynos_drm_init(void)
697{
698 int ret;
699
700 ret = exynos_drm_register_devices();
701 if (ret)
702 return ret;
703
704 ret = exynos_drm_register_drivers();
705 if (ret)
706 goto err_unregister_pdevs;
707
708 return 0;
709
710err_unregister_pdevs:
711 exynos_drm_unregister_devices();
712
713 return ret;
714}
715
716static void exynos_drm_exit(void)
717{
718 exynos_drm_unregister_drivers();
719 exynos_drm_unregister_devices();
720}
721
722module_init(exynos_drm_init);
723module_exit(exynos_drm_exit);
724
725MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
726MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
727MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
728MODULE_DESCRIPTION("Samsung SoC DRM Driver");
729MODULE_LICENSE("GPL");