2 * Copyright (C) 2012 Avionic Design GmbH
3 * Copyright (C) 2012-2013 NVIDIA CORPORATION. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/module.h>
11 #include <linux/of_address.h>
12 #include <linux/of_platform.h>
14 #include <linux/dma-mapping.h>
15 #include <asm/dma-iommu.h>
20 #include "host1x_client.h"
26 #define DRIVER_NAME "tegra"
27 #define DRIVER_DESC "NVIDIA Tegra graphics"
28 #define DRIVER_DATE "20120330"
29 #define DRIVER_MAJOR 0
30 #define DRIVER_MINOR 0
31 #define DRIVER_PATCHLEVEL 0
33 struct host1x_drm_client {
34 struct host1x_client *client;
35 struct device_node *np;
36 struct list_head list;
39 static int host1x_add_drm_client(struct host1x_drm *host1x,
40 struct device_node *np)
42 struct host1x_drm_client *client;
44 client = kzalloc(sizeof(*client), GFP_KERNEL);
48 INIT_LIST_HEAD(&client->list);
49 client->np = of_node_get(np);
51 list_add_tail(&client->list, &host1x->drm_clients);
56 static int host1x_activate_drm_client(struct host1x_drm *host1x,
57 struct host1x_drm_client *drm,
58 struct host1x_client *client)
60 mutex_lock(&host1x->drm_clients_lock);
61 list_del_init(&drm->list);
62 list_add_tail(&drm->list, &host1x->drm_active);
64 mutex_unlock(&host1x->drm_clients_lock);
69 static int host1x_remove_drm_client(struct host1x_drm *host1x,
70 struct host1x_drm_client *client)
72 mutex_lock(&host1x->drm_clients_lock);
73 list_del_init(&client->list);
74 mutex_unlock(&host1x->drm_clients_lock);
76 of_node_put(client->np);
82 static int host1x_parse_dt(struct host1x_drm *host1x)
84 static const char * const compat[] = {
86 "nvidia,tegra20-hdmi",
87 "nvidia,tegra20-gr2d",
89 "nvidia,tegra30-hdmi",
90 "nvidia,tegra30-gr2d",
95 for (i = 0; i < ARRAY_SIZE(compat); i++) {
96 struct device_node *np;
98 for_each_child_of_node(host1x->dev->of_node, np) {
99 if (of_device_is_compatible(np, compat[i]) &&
100 of_device_is_available(np)) {
101 err = host1x_add_drm_client(host1x, np);
111 int host1x_drm_alloc(struct platform_device *pdev)
113 struct host1x_drm *host1x;
116 host1x = devm_kzalloc(&pdev->dev, sizeof(*host1x), GFP_KERNEL);
120 mutex_init(&host1x->drm_clients_lock);
121 INIT_LIST_HEAD(&host1x->drm_clients);
122 INIT_LIST_HEAD(&host1x->drm_active);
123 mutex_init(&host1x->clients_lock);
124 INIT_LIST_HEAD(&host1x->clients);
125 host1x->dev = &pdev->dev;
127 err = host1x_parse_dt(host1x);
129 dev_err(&pdev->dev, "failed to parse DT: %d\n", err);
133 host1x_set_drm_data(&pdev->dev, host1x);
138 int host1x_drm_init(struct host1x_drm *host1x, struct drm_device *drm)
140 struct host1x_client *client;
142 mutex_lock(&host1x->clients_lock);
144 list_for_each_entry(client, &host1x->clients, list) {
145 if (client->ops && client->ops->drm_init) {
146 int err = client->ops->drm_init(client, drm);
149 "DRM setup failed for %s: %d\n",
150 dev_name(client->dev), err);
156 mutex_unlock(&host1x->clients_lock);
161 int host1x_drm_exit(struct host1x_drm *host1x)
163 struct platform_device *pdev = to_platform_device(host1x->dev);
164 struct host1x_client *client;
169 mutex_lock(&host1x->clients_lock);
171 list_for_each_entry_reverse(client, &host1x->clients, list) {
172 if (client->ops && client->ops->drm_exit) {
173 int err = client->ops->drm_exit(client);
176 "DRM cleanup failed for %s: %d\n",
177 dev_name(client->dev), err);
183 mutex_unlock(&host1x->clients_lock);
185 drm_platform_exit(&tegra_drm_driver, pdev);
191 int host1x_register_client(struct host1x_drm *host1x,
192 struct host1x_client *client)
194 struct host1x_drm_client *drm, *tmp;
197 mutex_lock(&host1x->clients_lock);
198 list_add_tail(&client->list, &host1x->clients);
199 mutex_unlock(&host1x->clients_lock);
201 list_for_each_entry_safe(drm, tmp, &host1x->drm_clients, list)
202 if (drm->np == client->dev->of_node)
203 host1x_activate_drm_client(host1x, drm, client);
205 if (list_empty(&host1x->drm_clients)) {
206 struct platform_device *pdev = to_platform_device(host1x->dev);
208 err = drm_platform_init(&tegra_drm_driver, pdev);
210 dev_err(host1x->dev, "drm_platform_init(): %d\n", err);
218 int host1x_unregister_client(struct host1x_drm *host1x,
219 struct host1x_client *client)
221 struct host1x_drm_client *drm, *tmp;
224 list_for_each_entry_safe(drm, tmp, &host1x->drm_active, list) {
225 if (drm->client == client) {
226 err = host1x_drm_exit(host1x);
228 dev_err(host1x->dev, "host1x_drm_exit(): %d\n",
233 host1x_remove_drm_client(host1x, drm);
238 mutex_lock(&host1x->clients_lock);
239 list_del_init(&client->list);
240 mutex_unlock(&host1x->clients_lock);
245 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
247 struct host1x_drm *host1x;
250 host1x = host1x_get_drm_data(drm->dev);
251 drm->dev_private = host1x;
254 drm_mode_config_init(drm);
256 err = host1x_drm_init(host1x, drm);
260 err = drm_vblank_init(drm, drm->mode_config.num_crtc);
264 err = tegra_drm_fb_init(drm);
268 drm_kms_helper_poll_init(drm);
273 static int tegra_drm_unload(struct drm_device *drm)
275 drm_kms_helper_poll_fini(drm);
276 tegra_drm_fb_exit(drm);
278 drm_mode_config_cleanup(drm);
283 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
285 struct host1x_drm_file *fpriv;
287 fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
291 INIT_LIST_HEAD(&fpriv->contexts);
292 filp->driver_priv = fpriv;
297 static void host1x_drm_context_free(struct host1x_drm_context *context)
299 context->client->ops->close_channel(context);
303 static void tegra_drm_lastclose(struct drm_device *drm)
305 struct host1x_drm *host1x = drm->dev_private;
307 tegra_fbdev_restore_mode(host1x->fbdev);
310 #ifdef CONFIG_DRM_TEGRA_STAGING
311 static bool host1x_drm_file_owns_context(struct host1x_drm_file *file,
312 struct host1x_drm_context *context)
314 struct host1x_drm_context *ctx;
316 list_for_each_entry(ctx, &file->contexts, list)
323 static int tegra_gem_create(struct drm_device *drm, void *data,
324 struct drm_file *file)
326 struct drm_tegra_gem_create *args = data;
329 bo = tegra_bo_create_with_handle(file, drm, args->size,
337 static int tegra_gem_mmap(struct drm_device *drm, void *data,
338 struct drm_file *file)
340 struct drm_tegra_gem_mmap *args = data;
341 struct drm_gem_object *gem;
344 gem = drm_gem_object_lookup(drm, file, args->handle);
348 bo = to_tegra_bo(gem);
350 args->offset = tegra_bo_get_mmap_offset(bo);
352 drm_gem_object_unreference(gem);
357 static int tegra_syncpt_read(struct drm_device *drm, void *data,
358 struct drm_file *file)
360 struct drm_tegra_syncpt_read *args = data;
361 struct host1x *host = dev_get_drvdata(drm->dev);
362 struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
367 args->value = host1x_syncpt_read_min(sp);
371 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
372 struct drm_file *file)
374 struct drm_tegra_syncpt_incr *args = data;
375 struct host1x *host = dev_get_drvdata(drm->dev);
376 struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
381 host1x_syncpt_incr(sp);
385 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
386 struct drm_file *file)
388 struct drm_tegra_syncpt_wait *args = data;
389 struct host1x *host = dev_get_drvdata(drm->dev);
390 struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
395 return host1x_syncpt_wait(sp, args->thresh, args->timeout,
399 static int tegra_open_channel(struct drm_device *drm, void *data,
400 struct drm_file *file)
402 struct drm_tegra_open_channel *args = data;
403 struct host1x_client *client;
404 struct host1x_drm_context *context;
405 struct host1x_drm_file *fpriv = file->driver_priv;
406 struct host1x_drm *host1x = drm->dev_private;
409 context = kzalloc(sizeof(*context), GFP_KERNEL);
413 list_for_each_entry(client, &host1x->clients, list)
414 if (client->class == args->client) {
415 err = client->ops->open_channel(client, context);
419 context->client = client;
420 list_add(&context->list, &fpriv->contexts);
421 args->context = (uintptr_t)context;
429 static int tegra_close_channel(struct drm_device *drm, void *data,
430 struct drm_file *file)
432 struct drm_tegra_close_channel *args = data;
433 struct host1x_drm_file *fpriv = file->driver_priv;
434 struct host1x_drm_context *context =
435 (struct host1x_drm_context *)(uintptr_t)args->context;
437 if (!host1x_drm_file_owns_context(fpriv, context))
440 list_del(&context->list);
441 host1x_drm_context_free(context);
446 static int tegra_get_syncpt(struct drm_device *drm, void *data,
447 struct drm_file *file)
449 struct drm_tegra_get_syncpt *args = data;
450 struct host1x_drm_file *fpriv = file->driver_priv;
451 struct host1x_drm_context *context =
452 (struct host1x_drm_context *)(uintptr_t)args->context;
453 struct host1x_syncpt *syncpt;
455 if (!host1x_drm_file_owns_context(fpriv, context))
458 if (args->index >= context->client->num_syncpts)
461 syncpt = context->client->syncpts[args->index];
462 args->id = host1x_syncpt_id(syncpt);
467 static int tegra_submit(struct drm_device *drm, void *data,
468 struct drm_file *file)
470 struct drm_tegra_submit *args = data;
471 struct host1x_drm_file *fpriv = file->driver_priv;
472 struct host1x_drm_context *context =
473 (struct host1x_drm_context *)(uintptr_t)args->context;
475 if (!host1x_drm_file_owns_context(fpriv, context))
478 return context->client->ops->submit(context, args, drm, file);
482 static struct drm_ioctl_desc tegra_drm_ioctls[] = {
483 #ifdef CONFIG_DRM_TEGRA_STAGING
484 DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED | DRM_AUTH),
485 DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
486 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
487 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
488 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
489 DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
490 DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
491 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
492 DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
496 static const struct file_operations tegra_drm_fops = {
497 .owner = THIS_MODULE,
499 .release = drm_release,
500 .unlocked_ioctl = drm_ioctl,
501 .mmap = tegra_drm_mmap,
503 .fasync = drm_fasync,
506 .compat_ioctl = drm_compat_ioctl,
508 .llseek = noop_llseek,
511 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm, int pipe)
513 struct drm_crtc *crtc;
515 list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
516 struct tegra_dc *dc = to_tegra_dc(crtc);
518 if (dc->pipe == pipe)
525 static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
527 /* TODO: implement real hardware counter using syncpoints */
528 return drm_vblank_count(dev, crtc);
531 static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
533 struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
534 struct tegra_dc *dc = to_tegra_dc(crtc);
539 tegra_dc_enable_vblank(dc);
544 static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
546 struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
547 struct tegra_dc *dc = to_tegra_dc(crtc);
550 tegra_dc_disable_vblank(dc);
553 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
555 struct host1x_drm_file *fpriv = file->driver_priv;
556 struct host1x_drm_context *context, *tmp;
557 struct drm_crtc *crtc;
559 list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
560 tegra_dc_cancel_page_flip(crtc, file);
562 list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
563 host1x_drm_context_free(context);
568 #ifdef CONFIG_DEBUG_FS
569 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
571 struct drm_info_node *node = (struct drm_info_node *)s->private;
572 struct drm_device *drm = node->minor->dev;
573 struct drm_framebuffer *fb;
575 mutex_lock(&drm->mode_config.fb_lock);
577 list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
578 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
579 fb->base.id, fb->width, fb->height, fb->depth,
581 atomic_read(&fb->refcount.refcount));
584 mutex_unlock(&drm->mode_config.fb_lock);
589 static struct drm_info_list tegra_debugfs_list[] = {
590 { "framebuffers", tegra_debugfs_framebuffers, 0 },
593 static int tegra_debugfs_init(struct drm_minor *minor)
595 return drm_debugfs_create_files(tegra_debugfs_list,
596 ARRAY_SIZE(tegra_debugfs_list),
597 minor->debugfs_root, minor);
600 static void tegra_debugfs_cleanup(struct drm_minor *minor)
602 drm_debugfs_remove_files(tegra_debugfs_list,
603 ARRAY_SIZE(tegra_debugfs_list), minor);
607 struct drm_driver tegra_drm_driver = {
608 .driver_features = DRIVER_BUS_PLATFORM | DRIVER_MODESET | DRIVER_GEM,
609 .load = tegra_drm_load,
610 .unload = tegra_drm_unload,
611 .open = tegra_drm_open,
612 .preclose = tegra_drm_preclose,
613 .lastclose = tegra_drm_lastclose,
615 .get_vblank_counter = tegra_drm_get_vblank_counter,
616 .enable_vblank = tegra_drm_enable_vblank,
617 .disable_vblank = tegra_drm_disable_vblank,
619 #if defined(CONFIG_DEBUG_FS)
620 .debugfs_init = tegra_debugfs_init,
621 .debugfs_cleanup = tegra_debugfs_cleanup,
624 .gem_free_object = tegra_bo_free_object,
625 .gem_vm_ops = &tegra_bo_vm_ops,
626 .dumb_create = tegra_bo_dumb_create,
627 .dumb_map_offset = tegra_bo_dumb_map_offset,
628 .dumb_destroy = tegra_bo_dumb_destroy,
630 .ioctls = tegra_drm_ioctls,
631 .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
632 .fops = &tegra_drm_fops,
637 .major = DRIVER_MAJOR,
638 .minor = DRIVER_MINOR,
639 .patchlevel = DRIVER_PATCHLEVEL,