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path: root/drivers/gpu/drm/tegra/drm.c
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Diffstat (limited to 'drivers/gpu/drm/tegra/drm.c')
-rw-r--r--drivers/gpu/drm/tegra/drm.c714
1 files changed, 714 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
new file mode 100644
index 00000000000..28e17813771
--- /dev/null
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -0,0 +1,714 @@
+/*
+ * Copyright (C) 2012 Avionic Design GmbH
+ * Copyright (C) 2012-2013 NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/host1x.h>
+
+#include "drm.h"
+#include "gem.h"
+
+#define DRIVER_NAME "tegra"
+#define DRIVER_DESC "NVIDIA Tegra graphics"
+#define DRIVER_DATE "20120330"
+#define DRIVER_MAJOR 0
+#define DRIVER_MINOR 0
+#define DRIVER_PATCHLEVEL 0
+
+struct tegra_drm_file {
+ struct list_head contexts;
+};
+
+static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
+{
+ struct host1x_device *device = to_host1x_device(drm->dev);
+ struct tegra_drm *tegra;
+ int err;
+
+ tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
+ if (!tegra)
+ return -ENOMEM;
+
+ dev_set_drvdata(drm->dev, tegra);
+ mutex_init(&tegra->clients_lock);
+ INIT_LIST_HEAD(&tegra->clients);
+ drm->dev_private = tegra;
+ tegra->drm = drm;
+
+ drm_mode_config_init(drm);
+
+ err = host1x_device_init(device);
+ if (err < 0)
+ return err;
+
+ /*
+ * We don't use the drm_irq_install() helpers provided by the DRM
+ * core, so we need to set this manually in order to allow the
+ * DRM_IOCTL_WAIT_VBLANK to operate correctly.
+ */
+ drm->irq_enabled = true;
+
+ err = drm_vblank_init(drm, drm->mode_config.num_crtc);
+ if (err < 0)
+ return err;
+
+ err = tegra_drm_fb_init(drm);
+ if (err < 0)
+ return err;
+
+ drm_kms_helper_poll_init(drm);
+
+ return 0;
+}
+
+static int tegra_drm_unload(struct drm_device *drm)
+{
+ struct host1x_device *device = to_host1x_device(drm->dev);
+ int err;
+
+ drm_kms_helper_poll_fini(drm);
+ tegra_drm_fb_exit(drm);
+ drm_vblank_cleanup(drm);
+ drm_mode_config_cleanup(drm);
+
+ err = host1x_device_exit(device);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
+{
+ struct tegra_drm_file *fpriv;
+
+ fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
+ if (!fpriv)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&fpriv->contexts);
+ filp->driver_priv = fpriv;
+
+ return 0;
+}
+
+static void tegra_drm_context_free(struct tegra_drm_context *context)
+{
+ context->client->ops->close_channel(context);
+ kfree(context);
+}
+
+static void tegra_drm_lastclose(struct drm_device *drm)
+{
+ struct tegra_drm *tegra = drm->dev_private;
+
+ tegra_fbdev_restore_mode(tegra->fbdev);
+}
+
+static struct host1x_bo *
+host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
+{
+ struct drm_gem_object *gem;
+ struct tegra_bo *bo;
+
+ gem = drm_gem_object_lookup(drm, file, handle);
+ if (!gem)
+ return NULL;
+
+ mutex_lock(&drm->struct_mutex);
+ drm_gem_object_unreference(gem);
+ mutex_unlock(&drm->struct_mutex);
+
+ bo = to_tegra_bo(gem);
+ return &bo->base;
+}
+
+int tegra_drm_submit(struct tegra_drm_context *context,
+ struct drm_tegra_submit *args, struct drm_device *drm,
+ struct drm_file *file)
+{
+ unsigned int num_cmdbufs = args->num_cmdbufs;
+ unsigned int num_relocs = args->num_relocs;
+ unsigned int num_waitchks = args->num_waitchks;
+ struct drm_tegra_cmdbuf __user *cmdbufs =
+ (void * __user)(uintptr_t)args->cmdbufs;
+ struct drm_tegra_reloc __user *relocs =
+ (void * __user)(uintptr_t)args->relocs;
+ struct drm_tegra_waitchk __user *waitchks =
+ (void * __user)(uintptr_t)args->waitchks;
+ struct drm_tegra_syncpt syncpt;
+ struct host1x_job *job;
+ int err;
+
+ /* We don't yet support other than one syncpt_incr struct per submit */
+ if (args->num_syncpts != 1)
+ return -EINVAL;
+
+ job = host1x_job_alloc(context->channel, args->num_cmdbufs,
+ args->num_relocs, args->num_waitchks);
+ if (!job)
+ return -ENOMEM;
+
+ job->num_relocs = args->num_relocs;
+ job->num_waitchk = args->num_waitchks;
+ job->client = (u32)args->context;
+ job->class = context->client->base.class;
+ job->serialize = true;
+
+ while (num_cmdbufs) {
+ struct drm_tegra_cmdbuf cmdbuf;
+ struct host1x_bo *bo;
+
+ err = copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf));
+ if (err)
+ goto fail;
+
+ bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
+ if (!bo) {
+ err = -ENOENT;
+ goto fail;
+ }
+
+ host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
+ num_cmdbufs--;
+ cmdbufs++;
+ }
+
+ err = copy_from_user(job->relocarray, relocs,
+ sizeof(*relocs) * num_relocs);
+ if (err)
+ goto fail;
+
+ while (num_relocs--) {
+ struct host1x_reloc *reloc = &job->relocarray[num_relocs];
+ struct host1x_bo *cmdbuf, *target;
+
+ cmdbuf = host1x_bo_lookup(drm, file, (u32)reloc->cmdbuf);
+ target = host1x_bo_lookup(drm, file, (u32)reloc->target);
+
+ reloc->cmdbuf = cmdbuf;
+ reloc->target = target;
+
+ if (!reloc->target || !reloc->cmdbuf) {
+ err = -ENOENT;
+ goto fail;
+ }
+ }
+
+ err = copy_from_user(job->waitchk, waitchks,
+ sizeof(*waitchks) * num_waitchks);
+ if (err)
+ goto fail;
+
+ err = copy_from_user(&syncpt, (void * __user)(uintptr_t)args->syncpts,
+ sizeof(syncpt));
+ if (err)
+ goto fail;
+
+ job->is_addr_reg = context->client->ops->is_addr_reg;
+ job->syncpt_incrs = syncpt.incrs;
+ job->syncpt_id = syncpt.id;
+ job->timeout = 10000;
+
+ if (args->timeout && args->timeout < 10000)
+ job->timeout = args->timeout;
+
+ err = host1x_job_pin(job, context->client->base.dev);
+ if (err)
+ goto fail;
+
+ err = host1x_job_submit(job);
+ if (err)
+ goto fail_submit;
+
+ args->fence = job->syncpt_end;
+
+ host1x_job_put(job);
+ return 0;
+
+fail_submit:
+ host1x_job_unpin(job);
+fail:
+ host1x_job_put(job);
+ return err;
+}
+
+
+#ifdef CONFIG_DRM_TEGRA_STAGING
+static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
+{
+ return (struct tegra_drm_context *)(uintptr_t)context;
+}
+
+static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
+ struct tegra_drm_context *context)
+{
+ struct tegra_drm_context *ctx;
+
+ list_for_each_entry(ctx, &file->contexts, list)
+ if (ctx == context)
+ return true;
+
+ return false;
+}
+
+static int tegra_gem_create(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct drm_tegra_gem_create *args = data;
+ struct tegra_bo *bo;
+
+ bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
+ &args->handle);
+ if (IS_ERR(bo))
+ return PTR_ERR(bo);
+
+ return 0;
+}
+
+static int tegra_gem_mmap(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct drm_tegra_gem_mmap *args = data;
+ struct drm_gem_object *gem;
+ struct tegra_bo *bo;
+
+ gem = drm_gem_object_lookup(drm, file, args->handle);
+ if (!gem)
+ return -EINVAL;
+
+ bo = to_tegra_bo(gem);
+
+ args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
+
+ drm_gem_object_unreference(gem);
+
+ return 0;
+}
+
+static int tegra_syncpt_read(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct host1x *host = dev_get_drvdata(drm->dev->parent);
+ struct drm_tegra_syncpt_read *args = data;
+ struct host1x_syncpt *sp;
+
+ sp = host1x_syncpt_get(host, args->id);
+ if (!sp)
+ return -EINVAL;
+
+ args->value = host1x_syncpt_read_min(sp);
+ return 0;
+}
+
+static int tegra_syncpt_incr(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
+ struct drm_tegra_syncpt_incr *args = data;
+ struct host1x_syncpt *sp;
+
+ sp = host1x_syncpt_get(host1x, args->id);
+ if (!sp)
+ return -EINVAL;
+
+ return host1x_syncpt_incr(sp);
+}
+
+static int tegra_syncpt_wait(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
+ struct drm_tegra_syncpt_wait *args = data;
+ struct host1x_syncpt *sp;
+
+ sp = host1x_syncpt_get(host1x, args->id);
+ if (!sp)
+ return -EINVAL;
+
+ return host1x_syncpt_wait(sp, args->thresh, args->timeout,
+ &args->value);
+}
+
+static int tegra_open_channel(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct tegra_drm *tegra = drm->dev_private;
+ struct drm_tegra_open_channel *args = data;
+ struct tegra_drm_context *context;
+ struct tegra_drm_client *client;
+ int err = -ENODEV;
+
+ context = kzalloc(sizeof(*context), GFP_KERNEL);
+ if (!context)
+ return -ENOMEM;
+
+ list_for_each_entry(client, &tegra->clients, list)
+ if (client->base.class == args->client) {
+ err = client->ops->open_channel(client, context);
+ if (err)
+ break;
+
+ list_add(&context->list, &fpriv->contexts);
+ args->context = (uintptr_t)context;
+ context->client = client;
+ return 0;
+ }
+
+ kfree(context);
+ return err;
+}
+
+static int tegra_close_channel(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_close_channel *args = data;
+ struct tegra_drm_context *context;
+
+ context = tegra_drm_get_context(args->context);
+
+ if (!tegra_drm_file_owns_context(fpriv, context))
+ return -EINVAL;
+
+ list_del(&context->list);
+ tegra_drm_context_free(context);
+
+ return 0;
+}
+
+static int tegra_get_syncpt(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_get_syncpt *args = data;
+ struct tegra_drm_context *context;
+ struct host1x_syncpt *syncpt;
+
+ context = tegra_drm_get_context(args->context);
+
+ if (!tegra_drm_file_owns_context(fpriv, context))
+ return -ENODEV;
+
+ if (args->index >= context->client->base.num_syncpts)
+ return -EINVAL;
+
+ syncpt = context->client->base.syncpts[args->index];
+ args->id = host1x_syncpt_id(syncpt);
+
+ return 0;
+}
+
+static int tegra_submit(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_submit *args = data;
+ struct tegra_drm_context *context;
+
+ context = tegra_drm_get_context(args->context);
+
+ if (!tegra_drm_file_owns_context(fpriv, context))
+ return -ENODEV;
+
+ return context->client->ops->submit(context, args, drm, file);
+}
+
+static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_get_syncpt_base *args = data;
+ struct tegra_drm_context *context;
+ struct host1x_syncpt_base *base;
+ struct host1x_syncpt *syncpt;
+
+ context = tegra_drm_get_context(args->context);
+
+ if (!tegra_drm_file_owns_context(fpriv, context))
+ return -ENODEV;
+
+ if (args->syncpt >= context->client->base.num_syncpts)
+ return -EINVAL;
+
+ syncpt = context->client->base.syncpts[args->syncpt];
+
+ base = host1x_syncpt_get_base(syncpt);
+ if (!base)
+ return -ENXIO;
+
+ args->id = host1x_syncpt_base_id(base);
+
+ return 0;
+}
+#endif
+
+static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
+#ifdef CONFIG_DRM_TEGRA_STAGING
+ DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED | DRM_AUTH),
+ DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
+#endif
+};
+
+static const struct file_operations tegra_drm_fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+ .mmap = tegra_drm_mmap,
+ .poll = drm_poll,
+ .read = drm_read,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = drm_compat_ioctl,
+#endif
+ .llseek = noop_llseek,
+};
+
+static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm, int pipe)
+{
+ struct drm_crtc *crtc;
+
+ list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
+ struct tegra_dc *dc = to_tegra_dc(crtc);
+
+ if (dc->pipe == pipe)
+ return crtc;
+ }
+
+ return NULL;
+}
+
+static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
+{
+ /* TODO: implement real hardware counter using syncpoints */
+ return drm_vblank_count(dev, crtc);
+}
+
+static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
+{
+ struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
+ struct tegra_dc *dc = to_tegra_dc(crtc);
+
+ if (!crtc)
+ return -ENODEV;
+
+ tegra_dc_enable_vblank(dc);
+
+ return 0;
+}
+
+static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
+{
+ struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
+ struct tegra_dc *dc = to_tegra_dc(crtc);
+
+ if (crtc)
+ tegra_dc_disable_vblank(dc);
+}
+
+static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct tegra_drm_context *context, *tmp;
+ struct drm_crtc *crtc;
+
+ list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
+ tegra_dc_cancel_page_flip(crtc, file);
+
+ list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
+ tegra_drm_context_free(context);
+
+ kfree(fpriv);
+}
+
+#ifdef CONFIG_DEBUG_FS
+static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
+{
+ struct drm_info_node *node = (struct drm_info_node *)s->private;
+ struct drm_device *drm = node->minor->dev;
+ struct drm_framebuffer *fb;
+
+ mutex_lock(&drm->mode_config.fb_lock);
+
+ list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
+ seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
+ fb->base.id, fb->width, fb->height, fb->depth,
+ fb->bits_per_pixel,
+ atomic_read(&fb->refcount.refcount));
+ }
+
+ mutex_unlock(&drm->mode_config.fb_lock);
+
+ return 0;
+}
+
+static struct drm_info_list tegra_debugfs_list[] = {
+ { "framebuffers", tegra_debugfs_framebuffers, 0 },
+};
+
+static int tegra_debugfs_init(struct drm_minor *minor)
+{
+ return drm_debugfs_create_files(tegra_debugfs_list,
+ ARRAY_SIZE(tegra_debugfs_list),
+ minor->debugfs_root, minor);
+}
+
+static void tegra_debugfs_cleanup(struct drm_minor *minor)
+{
+ drm_debugfs_remove_files(tegra_debugfs_list,
+ ARRAY_SIZE(tegra_debugfs_list), minor);
+}
+#endif
+
+struct drm_driver tegra_drm_driver = {
+ .driver_features = DRIVER_MODESET | DRIVER_GEM,
+ .load = tegra_drm_load,
+ .unload = tegra_drm_unload,
+ .open = tegra_drm_open,
+ .preclose = tegra_drm_preclose,
+ .lastclose = tegra_drm_lastclose,
+
+ .get_vblank_counter = tegra_drm_get_vblank_counter,
+ .enable_vblank = tegra_drm_enable_vblank,
+ .disable_vblank = tegra_drm_disable_vblank,
+
+#if defined(CONFIG_DEBUG_FS)
+ .debugfs_init = tegra_debugfs_init,
+ .debugfs_cleanup = tegra_debugfs_cleanup,
+#endif
+
+ .gem_free_object = tegra_bo_free_object,
+ .gem_vm_ops = &tegra_bo_vm_ops,
+ .dumb_create = tegra_bo_dumb_create,
+ .dumb_map_offset = tegra_bo_dumb_map_offset,
+ .dumb_destroy = drm_gem_dumb_destroy,
+
+ .ioctls = tegra_drm_ioctls,
+ .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
+ .fops = &tegra_drm_fops,
+
+ .name = DRIVER_NAME,
+ .desc = DRIVER_DESC,
+ .date = DRIVER_DATE,
+ .major = DRIVER_MAJOR,
+ .minor = DRIVER_MINOR,
+ .patchlevel = DRIVER_PATCHLEVEL,
+};
+
+int tegra_drm_register_client(struct tegra_drm *tegra,
+ struct tegra_drm_client *client)
+{
+ mutex_lock(&tegra->clients_lock);
+ list_add_tail(&client->list, &tegra->clients);
+ mutex_unlock(&tegra->clients_lock);
+
+ return 0;
+}
+
+int tegra_drm_unregister_client(struct tegra_drm *tegra,
+ struct tegra_drm_client *client)
+{
+ mutex_lock(&tegra->clients_lock);
+ list_del_init(&client->list);
+ mutex_unlock(&tegra->clients_lock);
+
+ return 0;
+}
+
+static int host1x_drm_probe(struct host1x_device *device)
+{
+ return drm_host1x_init(&tegra_drm_driver, device);
+}
+
+static int host1x_drm_remove(struct host1x_device *device)
+{
+ drm_host1x_exit(&tegra_drm_driver, device);
+
+ return 0;
+}
+
+static const struct of_device_id host1x_drm_subdevs[] = {
+ { .compatible = "nvidia,tegra20-dc", },
+ { .compatible = "nvidia,tegra20-hdmi", },
+ { .compatible = "nvidia,tegra20-gr2d", },
+ { .compatible = "nvidia,tegra20-gr3d", },
+ { .compatible = "nvidia,tegra30-dc", },
+ { .compatible = "nvidia,tegra30-hdmi", },
+ { .compatible = "nvidia,tegra30-gr2d", },
+ { .compatible = "nvidia,tegra30-gr3d", },
+ { .compatible = "nvidia,tegra114-hdmi", },
+ { .compatible = "nvidia,tegra114-gr3d", },
+ { /* sentinel */ }
+};
+
+static struct host1x_driver host1x_drm_driver = {
+ .name = "drm",
+ .probe = host1x_drm_probe,
+ .remove = host1x_drm_remove,
+ .subdevs = host1x_drm_subdevs,
+};
+
+static int __init host1x_drm_init(void)
+{
+ int err;
+
+ err = host1x_driver_register(&host1x_drm_driver);
+ if (err < 0)
+ return err;
+
+ err = platform_driver_register(&tegra_dc_driver);
+ if (err < 0)
+ goto unregister_host1x;
+
+ err = platform_driver_register(&tegra_hdmi_driver);
+ if (err < 0)
+ goto unregister_dc;
+
+ err = platform_driver_register(&tegra_gr2d_driver);
+ if (err < 0)
+ goto unregister_hdmi;
+
+ err = platform_driver_register(&tegra_gr3d_driver);
+ if (err < 0)
+ goto unregister_gr2d;
+
+ return 0;
+
+unregister_gr2d:
+ platform_driver_unregister(&tegra_gr2d_driver);
+unregister_hdmi:
+ platform_driver_unregister(&tegra_hdmi_driver);
+unregister_dc:
+ platform_driver_unregister(&tegra_dc_driver);
+unregister_host1x:
+ host1x_driver_unregister(&host1x_drm_driver);
+ return err;
+}
+module_init(host1x_drm_init);
+
+static void __exit host1x_drm_exit(void)
+{
+ platform_driver_unregister(&tegra_gr3d_driver);
+ platform_driver_unregister(&tegra_gr2d_driver);
+ platform_driver_unregister(&tegra_hdmi_driver);
+ platform_driver_unregister(&tegra_dc_driver);
+ host1x_driver_unregister(&host1x_drm_driver);
+}
+module_exit(host1x_drm_exit);
+
+MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
+MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
+MODULE_LICENSE("GPL v2");