drivers/gpu/drm/tegra/drm.c

   1 /*
   2  * Copyright (C) 2012 Avionic Design GmbH
   3  * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
   4  *
   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.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/of_address.h>
  12 #include <linux/of_platform.h>
  13
  14 #include <mach/clk.h>
  15 #include <linux/dma-mapping.h>
  16 #include <asm/dma-iommu.h>
  17
  18 #include "drm.h"
  19
  20 #define DRIVER_NAME "tegra"
  21 #define DRIVER_DESC "NVIDIA Tegra graphics"
  22 #define DRIVER_DATE "20120330"
  23 #define DRIVER_MAJOR 0
  24 #define DRIVER_MINOR 0
  25 #define DRIVER_PATCHLEVEL 0
  26
  27 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
  28 {
  29         struct device *dev = drm->dev;
  30         struct host1x *host1x;
  31         int err;
  32
  33         host1x = dev_get_drvdata(dev);
  34         drm->dev_private = host1x;
  35         host1x->drm = drm;
  36
  37         drm_mode_config_init(drm);
  38
  39         err = host1x_drm_init(host1x, drm);
  40         if (err < 0)
  41                 return err;
  42
  43         err = tegra_drm_fb_init(drm);
  44         if (err < 0)
  45                 return err;
  46
  47         drm_kms_helper_poll_init(drm);
  48
  49         return 0;
  50 }
  51
  52 static int tegra_drm_unload(struct drm_device *drm)
  53 {
  54         drm_kms_helper_poll_fini(drm);
  55         tegra_drm_fb_exit(drm);
  56
  57         drm_mode_config_cleanup(drm);
  58
  59         return 0;
  60 }
  61
  62 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
  63 {
  64         return 0;
  65 }
  66
  67 static void tegra_drm_lastclose(struct drm_device *drm)
  68 {
  69         struct host1x *host1x = drm->dev_private;
  70
  71         drm_fbdev_cma_restore_mode(host1x->fbdev);
  72 }
  73
  74 static struct drm_ioctl_desc tegra_drm_ioctls[] = {
  75 };
  76
  77 static const struct file_operations tegra_drm_fops = {
  78         .owner = THIS_MODULE,
  79         .open = drm_open,
  80         .release = drm_release,
  81         .unlocked_ioctl = drm_ioctl,
  82         .mmap = drm_gem_cma_mmap,
  83         .poll = drm_poll,
  84         .fasync = drm_fasync,
  85         .read = drm_read,
  86 #ifdef CONFIG_COMPAT
  87         .compat_ioctl = drm_compat_ioctl,
  88 #endif
  89         .llseek = noop_llseek,
  90 };
  91
  92 struct drm_driver tegra_drm_driver = {
  93         .driver_features = DRIVER_BUS_PLATFORM | DRIVER_MODESET | DRIVER_GEM,
  94         .load = tegra_drm_load,
  95         .unload = tegra_drm_unload,
  96         .open = tegra_drm_open,
  97         .lastclose = tegra_drm_lastclose,
  98
  99         .gem_free_object = drm_gem_cma_free_object,
 100         .gem_vm_ops = &drm_gem_cma_vm_ops,
 101         .dumb_create = drm_gem_cma_dumb_create,
 102         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
 103         .dumb_destroy = drm_gem_cma_dumb_destroy,
 104
 105         .ioctls = tegra_drm_ioctls,
 106         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 107         .fops = &tegra_drm_fops,
 108
 109         .name = DRIVER_NAME,
 110         .desc = DRIVER_DESC,
 111         .date = DRIVER_DATE,
 112         .major = DRIVER_MAJOR,
 113         .minor = DRIVER_MINOR,
 114         .patchlevel = DRIVER_PATCHLEVEL,
 115 };