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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#include <drm/drm_fb_helper.h>
20
21#include <linux/component.h>
22
23#include <drm/exynos_drm.h>
24
25#include "exynos_drm_drv.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_iommu.h"
33
34#define DRIVER_NAME "exynos"
35#define DRIVER_DESC "Samsung SoC DRM"
36#define DRIVER_DATE "20110530"
37#define DRIVER_MAJOR 1
38#define DRIVER_MINOR 0
39
40int exynos_atomic_check(struct drm_device *dev,
41 struct drm_atomic_state *state)
42{
43 int ret;
44
45 ret = drm_atomic_helper_check_modeset(dev, state);
46 if (ret)
47 return ret;
48
49 ret = drm_atomic_normalize_zpos(dev, state);
50 if (ret)
51 return ret;
52
53 ret = drm_atomic_helper_check_planes(dev, state);
54 if (ret)
55 return ret;
56
57 return ret;
58}
59
60static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
61{
62 struct drm_exynos_file_private *file_priv;
63 int ret;
64
65 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
66 if (!file_priv)
67 return -ENOMEM;
68
69 file->driver_priv = file_priv;
70
71 ret = exynos_drm_subdrv_open(dev, file);
72 if (ret)
73 goto err_file_priv_free;
74
75 return ret;
76
77err_file_priv_free:
78 kfree(file_priv);
79 file->driver_priv = NULL;
80 return ret;
81}
82
83static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
84{
85 exynos_drm_subdrv_close(dev, file);
86 kfree(file->driver_priv);
87 file->driver_priv = NULL;
88}
89
90static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
91 .fault = exynos_drm_gem_fault,
92 .open = drm_gem_vm_open,
93 .close = drm_gem_vm_close,
94};
95
96static const struct drm_ioctl_desc exynos_ioctls[] = {
97 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
98 DRM_AUTH | DRM_RENDER_ALLOW),
99 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
100 DRM_AUTH | DRM_RENDER_ALLOW),
101 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
102 DRM_RENDER_ALLOW),
103 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
104 DRM_AUTH),
105 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
106 DRM_AUTH | DRM_RENDER_ALLOW),
107 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
108 DRM_AUTH | DRM_RENDER_ALLOW),
109 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
110 DRM_AUTH | DRM_RENDER_ALLOW),
111};
112
113static const struct file_operations exynos_drm_driver_fops = {
114 .owner = THIS_MODULE,
115 .open = drm_open,
116 .mmap = exynos_drm_gem_mmap,
117 .poll = drm_poll,
118 .read = drm_read,
119 .unlocked_ioctl = drm_ioctl,
120 .compat_ioctl = drm_compat_ioctl,
121 .release = drm_release,
122};
123
124static struct drm_driver exynos_drm_driver = {
125 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
126 | DRIVER_ATOMIC | DRIVER_RENDER,
127 .open = exynos_drm_open,
128 .lastclose = drm_fb_helper_lastclose,
129 .postclose = exynos_drm_postclose,
130 .gem_free_object_unlocked = exynos_drm_gem_free_object,
131 .gem_vm_ops = &exynos_drm_gem_vm_ops,
132 .dumb_create = exynos_drm_gem_dumb_create,
133 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
134 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
135 .gem_prime_export = drm_gem_prime_export,
136 .gem_prime_import = exynos_drm_gem_prime_import,
137 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
138 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table,
139 .gem_prime_vmap = exynos_drm_gem_prime_vmap,
140 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap,
141 .gem_prime_mmap = exynos_drm_gem_prime_mmap,
142 .ioctls = exynos_ioctls,
143 .num_ioctls = ARRAY_SIZE(exynos_ioctls),
144 .fops = &exynos_drm_driver_fops,
145 .name = DRIVER_NAME,
146 .desc = DRIVER_DESC,
147 .date = DRIVER_DATE,
148 .major = DRIVER_MAJOR,
149 .minor = DRIVER_MINOR,
150};
151
152#ifdef CONFIG_PM_SLEEP
153static int exynos_drm_suspend(struct device *dev)
154{
155 struct drm_device *drm_dev = dev_get_drvdata(dev);
156 struct exynos_drm_private *private;
157
158 if (pm_runtime_suspended(dev) || !drm_dev)
159 return 0;
160
161 private = drm_dev->dev_private;
162
163 drm_kms_helper_poll_disable(drm_dev);
164 exynos_drm_fbdev_suspend(drm_dev);
165 private->suspend_state = drm_atomic_helper_suspend(drm_dev);
166 if (IS_ERR(private->suspend_state)) {
167 exynos_drm_fbdev_resume(drm_dev);
168 drm_kms_helper_poll_enable(drm_dev);
169 return PTR_ERR(private->suspend_state);
170 }
171
172 return 0;
173}
174
175static int exynos_drm_resume(struct device *dev)
176{
177 struct drm_device *drm_dev = dev_get_drvdata(dev);
178 struct exynos_drm_private *private;
179
180 if (pm_runtime_suspended(dev) || !drm_dev)
181 return 0;
182
183 private = drm_dev->dev_private;
184 drm_atomic_helper_resume(drm_dev, private->suspend_state);
185 exynos_drm_fbdev_resume(drm_dev);
186 drm_kms_helper_poll_enable(drm_dev);
187
188 return 0;
189}
190#endif
191
192static const struct dev_pm_ops exynos_drm_pm_ops = {
193 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
194};
195
196/* forward declaration */
197static struct platform_driver exynos_drm_platform_driver;
198
199struct exynos_drm_driver_info {
200 struct platform_driver *driver;
201 unsigned int flags;
202};
203
204#define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */
205#define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */
206#define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */
207
208#define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
209
210/*
211 * Connector drivers should not be placed before associated crtc drivers,
212 * because connector requires pipe number of its crtc during initialization.
213 */
214static struct exynos_drm_driver_info exynos_drm_drivers[] = {
215 {
216 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
217 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
218 }, {
219 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
220 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
221 }, {
222 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
223 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
224 }, {
225 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
226 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
227 }, {
228 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
229 DRM_COMPONENT_DRIVER
230 }, {
231 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
232 DRM_COMPONENT_DRIVER
233 }, {
234 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
235 DRM_COMPONENT_DRIVER
236 }, {
237 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
238 DRM_COMPONENT_DRIVER
239 }, {
240 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
241 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
242 }, {
243 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
244 }, {
245 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
246 }, {
247 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
248 }, {
249 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
250 }, {
251 &exynos_drm_platform_driver,
252 DRM_VIRTUAL_DEVICE
253 }
254};
255
256static int compare_dev(struct device *dev, void *data)
257{
258 return dev == (struct device *)data;
259}
260
261static struct component_match *exynos_drm_match_add(struct device *dev)
262{
263 struct component_match *match = NULL;
264 int i;
265
266 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
267 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
268 struct device *p = NULL, *d;
269
270 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
271 continue;
272
273 while ((d = bus_find_device(&platform_bus_type, p,
274 &info->driver->driver,
275 (void *)platform_bus_type.match))) {
276 put_device(p);
277 component_match_add(dev, &match, compare_dev, d);
278 p = d;
279 }
280 put_device(p);
281 }
282
283 return match ?: ERR_PTR(-ENODEV);
284}
285
286static struct device *exynos_drm_get_dma_device(void)
287{
288 int i;
289
290 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
291 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
292 struct device *dev;
293
294 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
295 continue;
296
297 while ((dev = bus_find_device(&platform_bus_type, NULL,
298 &info->driver->driver,
299 (void *)platform_bus_type.match))) {
300 put_device(dev);
301 return dev;
302 }
303 }
304 return NULL;
305}
306
307static int exynos_drm_bind(struct device *dev)
308{
309 struct exynos_drm_private *private;
310 struct drm_encoder *encoder;
311 struct drm_device *drm;
312 unsigned int clone_mask;
313 int cnt, ret;
314
315 drm = drm_dev_alloc(&exynos_drm_driver, dev);
316 if (IS_ERR(drm))
317 return PTR_ERR(drm);
318
319 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
320 if (!private) {
321 ret = -ENOMEM;
322 goto err_free_drm;
323 }
324
325 init_waitqueue_head(&private->wait);
326 spin_lock_init(&private->lock);
327
328 dev_set_drvdata(dev, drm);
329 drm->dev_private = (void *)private;
330
331 /* the first real CRTC device is used for all dma mapping operations */
332 private->dma_dev = exynos_drm_get_dma_device();
333 if (!private->dma_dev) {
334 DRM_ERROR("no device found for DMA mapping operations.\n");
335 ret = -ENODEV;
336 goto err_free_private;
337 }
338 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
339 dev_name(private->dma_dev));
340
341 /* create common IOMMU mapping for all devices attached to Exynos DRM */
342 ret = drm_create_iommu_mapping(drm);
343 if (ret < 0) {
344 DRM_ERROR("failed to create iommu mapping.\n");
345 goto err_free_private;
346 }
347
348 drm_mode_config_init(drm);
349
350 exynos_drm_mode_config_init(drm);
351
352 /* setup possible_clones. */
353 cnt = 0;
354 clone_mask = 0;
355 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
356 clone_mask |= (1 << (cnt++));
357
358 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
359 encoder->possible_clones = clone_mask;
360
361 /* Try to bind all sub drivers. */
362 ret = component_bind_all(drm->dev, drm);
363 if (ret)
364 goto err_mode_config_cleanup;
365
366 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
367 if (ret)
368 goto err_unbind_all;
369
370 /* Probe non kms sub drivers and virtual display driver. */
371 ret = exynos_drm_device_subdrv_probe(drm);
372 if (ret)
373 goto err_unbind_all;
374
375 drm_mode_config_reset(drm);
376
377 /*
378 * enable drm irq mode.
379 * - with irq_enabled = true, we can use the vblank feature.
380 *
381 * P.S. note that we wouldn't use drm irq handler but
382 * just specific driver own one instead because
383 * drm framework supports only one irq handler.
384 */
385 drm->irq_enabled = true;
386
387 /* init kms poll for handling hpd */
388 drm_kms_helper_poll_init(drm);
389
390 ret = exynos_drm_fbdev_init(drm);
391 if (ret)
392 goto err_cleanup_poll;
393
394 /* register the DRM device */
395 ret = drm_dev_register(drm, 0);
396 if (ret < 0)
397 goto err_cleanup_fbdev;
398
399 return 0;
400
401err_cleanup_fbdev:
402 exynos_drm_fbdev_fini(drm);
403err_cleanup_poll:
404 drm_kms_helper_poll_fini(drm);
405 exynos_drm_device_subdrv_remove(drm);
406err_unbind_all:
407 component_unbind_all(drm->dev, drm);
408err_mode_config_cleanup:
409 drm_mode_config_cleanup(drm);
410 drm_release_iommu_mapping(drm);
411err_free_private:
412 kfree(private);
413err_free_drm:
414 drm_dev_unref(drm);
415
416 return ret;
417}
418
419static void exynos_drm_unbind(struct device *dev)
420{
421 struct drm_device *drm = dev_get_drvdata(dev);
422
423 drm_dev_unregister(drm);
424
425 exynos_drm_device_subdrv_remove(drm);
426
427 exynos_drm_fbdev_fini(drm);
428 drm_kms_helper_poll_fini(drm);
429
430 component_unbind_all(drm->dev, drm);
431 drm_mode_config_cleanup(drm);
432 drm_release_iommu_mapping(drm);
433
434 kfree(drm->dev_private);
435 drm->dev_private = NULL;
436 dev_set_drvdata(dev, NULL);
437
438 drm_dev_unref(drm);
439}
440
441static const struct component_master_ops exynos_drm_ops = {
442 .bind = exynos_drm_bind,
443 .unbind = exynos_drm_unbind,
444};
445
446static int exynos_drm_platform_probe(struct platform_device *pdev)
447{
448 struct component_match *match;
449
450 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
451
452 match = exynos_drm_match_add(&pdev->dev);
453 if (IS_ERR(match))
454 return PTR_ERR(match);
455
456 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
457 match);
458}
459
460static int exynos_drm_platform_remove(struct platform_device *pdev)
461{
462 component_master_del(&pdev->dev, &exynos_drm_ops);
463 return 0;
464}
465
466static struct platform_driver exynos_drm_platform_driver = {
467 .probe = exynos_drm_platform_probe,
468 .remove = exynos_drm_platform_remove,
469 .driver = {
470 .name = "exynos-drm",
471 .pm = &exynos_drm_pm_ops,
472 },
473};
474
475static void exynos_drm_unregister_devices(void)
476{
477 int i;
478
479 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
480 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
481 struct device *dev;
482
483 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
484 continue;
485
486 while ((dev = bus_find_device(&platform_bus_type, NULL,
487 &info->driver->driver,
488 (void *)platform_bus_type.match))) {
489 put_device(dev);
490 platform_device_unregister(to_platform_device(dev));
491 }
492 }
493}
494
495static int exynos_drm_register_devices(void)
496{
497 struct platform_device *pdev;
498 int i;
499
500 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
501 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
502
503 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
504 continue;
505
506 pdev = platform_device_register_simple(
507 info->driver->driver.name, -1, NULL, 0);
508 if (IS_ERR(pdev))
509 goto fail;
510 }
511
512 return 0;
513fail:
514 exynos_drm_unregister_devices();
515 return PTR_ERR(pdev);
516}
517
518static void exynos_drm_unregister_drivers(void)
519{
520 int i;
521
522 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
523 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
524
525 if (!info->driver)
526 continue;
527
528 platform_driver_unregister(info->driver);
529 }
530}
531
532static int exynos_drm_register_drivers(void)
533{
534 int i, ret;
535
536 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
537 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
538
539 if (!info->driver)
540 continue;
541
542 ret = platform_driver_register(info->driver);
543 if (ret)
544 goto fail;
545 }
546 return 0;
547fail:
548 exynos_drm_unregister_drivers();
549 return ret;
550}
551
552static int exynos_drm_init(void)
553{
554 int ret;
555
556 ret = exynos_drm_register_devices();
557 if (ret)
558 return ret;
559
560 ret = exynos_drm_register_drivers();
561 if (ret)
562 goto err_unregister_pdevs;
563
564 return 0;
565
566err_unregister_pdevs:
567 exynos_drm_unregister_devices();
568
569 return ret;
570}
571
572static void exynos_drm_exit(void)
573{
574 exynos_drm_unregister_drivers();
575 exynos_drm_unregister_devices();
576}
577
578module_init(exynos_drm_init);
579module_exit(exynos_drm_exit);
580
581MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
582MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
583MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
584MODULE_DESCRIPTION("Samsung SoC DRM Driver");
585MODULE_LICENSE("GPL");