2 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
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.
14 #include <linux/pm_runtime.h>
16 #include <drm/drm_atomic.h>
17 #include <drm/drm_atomic_helper.h>
18 #include <drm/drm_crtc_helper.h>
20 #include <linux/component.h>
22 #include <drm/exynos_drm.h>
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"
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
41 struct exynos_atomic_commit {
42 struct work_struct work;
43 struct drm_device *dev;
44 struct drm_atomic_state *state;
48 static void exynos_atomic_wait_for_commit(struct drm_atomic_state *state)
50 struct drm_crtc_state *crtc_state;
51 struct drm_crtc *crtc;
54 for_each_crtc_in_state(state, crtc, crtc_state, i) {
55 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
57 if (!crtc->state->enable)
60 ret = drm_crtc_vblank_get(crtc);
64 exynos_drm_crtc_wait_pending_update(exynos_crtc);
65 drm_crtc_vblank_put(crtc);
69 static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit)
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;
80 drm_atomic_helper_commit_modeset_disables(dev, state);
82 drm_atomic_helper_commit_modeset_enables(dev, state);
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.
92 for_each_crtc_in_state(state, crtc, crtc_state, i) {
93 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
95 atomic_set(&exynos_crtc->pending_update, 0);
98 for_each_plane_in_state(state, plane, plane_state, i) {
99 struct exynos_drm_crtc *exynos_crtc =
100 to_exynos_crtc(plane->crtc);
105 atomic_inc(&exynos_crtc->pending_update);
108 drm_atomic_helper_commit_planes(dev, state, false);
110 exynos_atomic_wait_for_commit(state);
112 drm_atomic_helper_cleanup_planes(dev, state);
114 drm_atomic_state_free(state);
116 spin_lock(&priv->lock);
117 priv->pending &= ~commit->crtcs;
118 spin_unlock(&priv->lock);
120 wake_up_all(&priv->wait);
125 static void exynos_drm_atomic_work(struct work_struct *work)
127 struct exynos_atomic_commit *commit = container_of(work,
128 struct exynos_atomic_commit, work);
130 exynos_atomic_commit_complete(commit);
133 static struct device *exynos_drm_get_dma_device(void);
135 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
137 struct exynos_drm_private *private;
138 struct drm_encoder *encoder;
139 unsigned int clone_mask;
142 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
146 init_waitqueue_head(&private->wait);
147 spin_lock_init(&private->lock);
149 dev_set_drvdata(dev->dev, dev);
150 dev->dev_private = (void *)private;
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");
157 goto err_free_private;
159 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
160 dev_name(private->dma_dev));
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
168 ret = drm_create_iommu_mapping(dev);
170 DRM_ERROR("failed to create iommu mapping.\n");
171 goto err_free_private;
174 drm_mode_config_init(dev);
176 exynos_drm_mode_config_init(dev);
178 /* setup possible_clones. */
181 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
182 clone_mask |= (1 << (cnt++));
184 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
185 encoder->possible_clones = clone_mask;
187 platform_set_drvdata(dev->platformdev, dev);
189 /* Try to bind all sub drivers. */
190 ret = component_bind_all(dev->dev, dev);
192 goto err_mode_config_cleanup;
194 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
198 /* Probe non kms sub drivers and virtual display driver. */
199 ret = exynos_drm_device_subdrv_probe(dev);
201 goto err_cleanup_vblank;
203 drm_mode_config_reset(dev);
206 * enable drm irq mode.
207 * - with irq_enabled = true, we can use the vblank feature.
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.
213 dev->irq_enabled = true;
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)
220 dev->vblank_disable_allowed = true;
222 /* init kms poll for handling hpd */
223 drm_kms_helper_poll_init(dev);
225 /* force connectors detection */
226 drm_helper_hpd_irq_event(dev);
231 drm_vblank_cleanup(dev);
233 component_unbind_all(dev->dev, dev);
234 err_mode_config_cleanup:
235 drm_mode_config_cleanup(dev);
236 drm_release_iommu_mapping(dev);
243 static int exynos_drm_unload(struct drm_device *dev)
245 exynos_drm_device_subdrv_remove(dev);
247 exynos_drm_fbdev_fini(dev);
248 drm_kms_helper_poll_fini(dev);
250 drm_vblank_cleanup(dev);
251 component_unbind_all(dev->dev, dev);
252 drm_mode_config_cleanup(dev);
253 drm_release_iommu_mapping(dev);
255 kfree(dev->dev_private);
256 dev->dev_private = NULL;
261 static int commit_is_pending(struct exynos_drm_private *priv, u32 crtcs)
265 spin_lock(&priv->lock);
266 pending = priv->pending & crtcs;
267 spin_unlock(&priv->lock);
272 int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state,
275 struct exynos_drm_private *priv = dev->dev_private;
276 struct exynos_atomic_commit *commit;
279 commit = kzalloc(sizeof(*commit), GFP_KERNEL);
283 ret = drm_atomic_helper_prepare_planes(dev, state);
289 /* This is the point of no return */
291 INIT_WORK(&commit->work, exynos_drm_atomic_work);
293 commit->state = state;
295 /* Wait until all affected CRTCs have completed previous commits and
296 * mark them as pending.
298 for (i = 0; i < dev->mode_config.num_crtc; ++i) {
300 commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]);
303 wait_event(priv->wait, !commit_is_pending(priv, commit->crtcs));
305 spin_lock(&priv->lock);
306 priv->pending |= commit->crtcs;
307 spin_unlock(&priv->lock);
309 drm_atomic_helper_swap_state(dev, state);
312 schedule_work(&commit->work);
314 exynos_atomic_commit_complete(commit);
319 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
321 struct drm_exynos_file_private *file_priv;
324 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
328 file->driver_priv = file_priv;
330 ret = exynos_drm_subdrv_open(dev, file);
332 goto err_file_priv_free;
338 file->driver_priv = NULL;
342 static void exynos_drm_preclose(struct drm_device *dev,
343 struct drm_file *file)
345 struct drm_crtc *crtc;
347 exynos_drm_subdrv_close(dev, file);
349 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
350 exynos_drm_crtc_cancel_page_flip(crtc, file);
353 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
355 kfree(file->driver_priv);
356 file->driver_priv = NULL;
359 static void exynos_drm_lastclose(struct drm_device *dev)
361 exynos_drm_fbdev_restore_mode(dev);
364 static 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,
370 static 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,
377 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
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),
395 static const struct file_operations exynos_drm_driver_fops = {
396 .owner = THIS_MODULE,
398 .mmap = exynos_drm_gem_mmap,
401 .unlocked_ioctl = drm_ioctl,
403 .compat_ioctl = drm_compat_ioctl,
405 .release = drm_release,
408 static 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,
440 .major = DRIVER_MAJOR,
441 .minor = DRIVER_MINOR,
444 #ifdef CONFIG_PM_SLEEP
445 static int exynos_drm_suspend(struct device *dev)
447 struct drm_device *drm_dev = dev_get_drvdata(dev);
448 struct drm_connector *connector;
450 if (pm_runtime_suspended(dev) || !drm_dev)
453 drm_modeset_lock_all(drm_dev);
454 drm_for_each_connector(connector, drm_dev) {
455 int old_dpms = connector->dpms;
457 if (connector->funcs->dpms)
458 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
460 /* Set the old mode back to the connector for resume */
461 connector->dpms = old_dpms;
463 drm_modeset_unlock_all(drm_dev);
468 static int exynos_drm_resume(struct device *dev)
470 struct drm_device *drm_dev = dev_get_drvdata(dev);
471 struct drm_connector *connector;
473 if (pm_runtime_suspended(dev) || !drm_dev)
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;
481 connector->dpms = DRM_MODE_DPMS_OFF;
482 connector->funcs->dpms(connector, dpms);
485 drm_modeset_unlock_all(drm_dev);
491 static const struct dev_pm_ops exynos_drm_pm_ops = {
492 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
495 /* forward declaration */
496 static struct platform_driver exynos_drm_platform_driver;
498 struct exynos_drm_driver_info {
499 struct platform_driver *driver;
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 */
507 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
510 * Connector drivers should not be placed before associated crtc drivers,
511 * because connector requires pipe number of its crtc during initialization.
513 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
515 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
516 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
518 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
519 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
521 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
522 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
524 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
525 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
527 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
530 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
533 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
536 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
539 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
540 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
542 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
544 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
546 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
548 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
550 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP),
553 &exynos_drm_platform_driver,
558 static int compare_dev(struct device *dev, void *data)
560 return dev == (struct device *)data;
563 static struct component_match *exynos_drm_match_add(struct device *dev)
565 struct component_match *match = NULL;
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;
572 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
575 while ((d = bus_find_device(&platform_bus_type, p,
576 &info->driver->driver,
577 (void *)platform_bus_type.match))) {
579 component_match_add(dev, &match, compare_dev, d);
585 return match ?: ERR_PTR(-ENODEV);
588 static int exynos_drm_bind(struct device *dev)
590 return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
593 static void exynos_drm_unbind(struct device *dev)
595 drm_put_dev(dev_get_drvdata(dev));
598 static const struct component_master_ops exynos_drm_ops = {
599 .bind = exynos_drm_bind,
600 .unbind = exynos_drm_unbind,
603 static int exynos_drm_platform_probe(struct platform_device *pdev)
605 struct component_match *match;
607 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
608 exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
610 match = exynos_drm_match_add(&pdev->dev);
612 return PTR_ERR(match);
614 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
618 static int exynos_drm_platform_remove(struct platform_device *pdev)
620 component_master_del(&pdev->dev, &exynos_drm_ops);
624 static struct platform_driver exynos_drm_platform_driver = {
625 .probe = exynos_drm_platform_probe,
626 .remove = exynos_drm_platform_remove,
628 .name = "exynos-drm",
629 .pm = &exynos_drm_pm_ops,
633 static struct device *exynos_drm_get_dma_device(void)
637 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
638 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
641 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
644 while ((dev = bus_find_device(&platform_bus_type, NULL,
645 &info->driver->driver,
646 (void *)platform_bus_type.match))) {
654 static void exynos_drm_unregister_devices(void)
658 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
659 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
662 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
665 while ((dev = bus_find_device(&platform_bus_type, NULL,
666 &info->driver->driver,
667 (void *)platform_bus_type.match))) {
669 platform_device_unregister(to_platform_device(dev));
674 static int exynos_drm_register_devices(void)
676 struct platform_device *pdev;
679 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
680 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
682 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
685 pdev = platform_device_register_simple(
686 info->driver->driver.name, -1, NULL, 0);
693 exynos_drm_unregister_devices();
694 return PTR_ERR(pdev);
697 static void exynos_drm_unregister_drivers(void)
701 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
702 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
707 platform_driver_unregister(info->driver);
711 static int exynos_drm_register_drivers(void)
715 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
716 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
721 ret = platform_driver_register(info->driver);
727 exynos_drm_unregister_drivers();
731 static int exynos_drm_init(void)
735 ret = exynos_drm_register_devices();
739 ret = exynos_drm_register_drivers();
741 goto err_unregister_pdevs;
745 err_unregister_pdevs:
746 exynos_drm_unregister_devices();
751 static void exynos_drm_exit(void)
753 exynos_drm_unregister_drivers();
754 exynos_drm_unregister_devices();
757 module_init(exynos_drm_init);
758 module_exit(exynos_drm_exit);
763 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
764 MODULE_LICENSE("GPL");