drivers/gpu/drm/exynos/exynos_drm_drv.c

   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  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 #include "drmP.h"
  29 #include "drm.h"
  30 #include "drm_crtc_helper.h"
  31
  32 #include <drm/exynos_drm.h>
  33
  34 #include "exynos_drm_drv.h"
  35 #include "exynos_drm_crtc.h"
  36 #include "exynos_drm_encoder.h"
  37 #include "exynos_drm_fbdev.h"
  38 #include "exynos_drm_fb.h"
  39 #include "exynos_drm_gem.h"
  40 #include "exynos_drm_plane.h"
  41
  42 #define DRIVER_NAME     "exynos"
  43 #define DRIVER_DESC     "Samsung SoC DRM"
  44 #define DRIVER_DATE     "20110530"
  45 #define DRIVER_MAJOR    1
  46 #define DRIVER_MINOR    0
  47
  48 #define VBLANK_OFF_DELAY        50000
  49
  50 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
  51 {
  52         struct exynos_drm_private *private;
  53         int ret;
  54         int nr;
  55
  56         DRM_DEBUG_DRIVER("%s\n", __FILE__);
  57
  58         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
  59         if (!private) {
  60                 DRM_ERROR("failed to allocate private\n");
  61                 return -ENOMEM;
  62         }
  63
  64         INIT_LIST_HEAD(&private->pageflip_event_list);
  65         dev->dev_private = (void *)private;
  66
  67         drm_mode_config_init(dev);
  68
  69         /* init kms poll for handling hpd */
  70         drm_kms_helper_poll_init(dev);
  71
  72         exynos_drm_mode_config_init(dev);
  73
  74         /*
  75          * EXYNOS4 is enough to have two CRTCs and each crtc would be used
  76          * without dependency of hardware.
  77          */
  78         for (nr = 0; nr < MAX_CRTC; nr++) {
  79                 ret = exynos_drm_crtc_create(dev, nr);
  80                 if (ret)
  81                         goto err_crtc;
  82         }
  83
  84         for (nr = 0; nr < MAX_PLANE; nr++) {
  85                 ret = exynos_plane_init(dev, nr);
  86                 if (ret)
  87                         goto err_crtc;
  88         }
  89
  90         ret = drm_vblank_init(dev, MAX_CRTC);
  91         if (ret)
  92                 goto err_crtc;
  93
  94         /*
  95          * probe sub drivers such as display controller and hdmi driver,
  96          * that were registered at probe() of platform driver
  97          * to the sub driver and create encoder and connector for them.
  98          */
  99         ret = exynos_drm_device_register(dev);
 100         if (ret)
 101                 goto err_vblank;
 102
 103         /* setup possible_clones. */
 104         exynos_drm_encoder_setup(dev);
 105
 106         /*
 107          * create and configure fb helper and also exynos specific
 108          * fbdev object.
 109          */
 110         ret = exynos_drm_fbdev_init(dev);
 111         if (ret) {
 112                 DRM_ERROR("failed to initialize drm fbdev\n");
 113                 goto err_drm_device;
 114         }
 115
 116         drm_vblank_offdelay = VBLANK_OFF_DELAY;
 117
 118         return 0;
 119
 120 err_drm_device:
 121         exynos_drm_device_unregister(dev);
 122 err_vblank:
 123         drm_vblank_cleanup(dev);
 124 err_crtc:
 125         drm_mode_config_cleanup(dev);
 126         kfree(private);
 127
 128         return ret;
 129 }
 130
 131 static int exynos_drm_unload(struct drm_device *dev)
 132 {
 133         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 134
 135         exynos_drm_fbdev_fini(dev);
 136         exynos_drm_device_unregister(dev);
 137         drm_vblank_cleanup(dev);
 138         drm_kms_helper_poll_fini(dev);
 139         drm_mode_config_cleanup(dev);
 140         kfree(dev->dev_private);
 141
 142         dev->dev_private = NULL;
 143
 144         return 0;
 145 }
 146
 147 static void exynos_drm_preclose(struct drm_device *dev,
 148                                         struct drm_file *file)
 149 {
 150         struct exynos_drm_private *private = dev->dev_private;
 151         struct drm_pending_vblank_event *e, *t;
 152         unsigned long flags;
 153
 154         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 155
 156         /* release events of current file */
 157         spin_lock_irqsave(&dev->event_lock, flags);
 158         list_for_each_entry_safe(e, t, &private->pageflip_event_list,
 159                         base.link) {
 160                 if (e->base.file_priv == file) {
 161                         list_del(&e->base.link);
 162                         e->base.destroy(&e->base);
 163                 }
 164         }
 165         spin_unlock_irqrestore(&dev->event_lock, flags);
 166 }
 167
 168 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 169 {
 170         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 171
 172         if (!file->driver_priv)
 173                 return;
 174
 175         kfree(file->driver_priv);
 176         file->driver_priv = NULL;
 177 }
 178
 179 static void exynos_drm_lastclose(struct drm_device *dev)
 180 {
 181         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 182
 183         exynos_drm_fbdev_restore_mode(dev);
 184 }
 185
 186 static struct vm_operations_struct exynos_drm_gem_vm_ops = {
 187         .fault = exynos_drm_gem_fault,
 188         .open = drm_gem_vm_open,
 189         .close = drm_gem_vm_close,
 190 };
 191
 192 static struct drm_ioctl_desc exynos_ioctls[] = {
 193         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 194                         DRM_UNLOCKED | DRM_AUTH),
 195         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP_OFFSET,
 196                         exynos_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
 197                         DRM_AUTH),
 198         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
 199                         exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
 200         DRM_IOCTL_DEF_DRV(EXYNOS_PLANE_SET_ZPOS, exynos_plane_set_zpos_ioctl,
 201                         DRM_UNLOCKED | DRM_AUTH),
 202 };
 203
 204 static const struct file_operations exynos_drm_driver_fops = {
 205         .owner          = THIS_MODULE,
 206         .open           = drm_open,
 207         .mmap           = exynos_drm_gem_mmap,
 208         .poll           = drm_poll,
 209         .read           = drm_read,
 210         .unlocked_ioctl = drm_ioctl,
 211         .release        = drm_release,
 212 };
 213
 214 static struct drm_driver exynos_drm_driver = {
 215         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_BUS_PLATFORM |
 216                                   DRIVER_MODESET | DRIVER_GEM,
 217         .load                   = exynos_drm_load,
 218         .unload                 = exynos_drm_unload,
 219         .preclose               = exynos_drm_preclose,
 220         .lastclose              = exynos_drm_lastclose,
 221         .postclose              = exynos_drm_postclose,
 222         .get_vblank_counter     = drm_vblank_count,
 223         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 224         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 225         .gem_init_object        = exynos_drm_gem_init_object,
 226         .gem_free_object        = exynos_drm_gem_free_object,
 227         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 228         .dumb_create            = exynos_drm_gem_dumb_create,
 229         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 230         .dumb_destroy           = exynos_drm_gem_dumb_destroy,
 231         .ioctls                 = exynos_ioctls,
 232         .fops                   = &exynos_drm_driver_fops,
 233         .name   = DRIVER_NAME,
 234         .desc   = DRIVER_DESC,
 235         .date   = DRIVER_DATE,
 236         .major  = DRIVER_MAJOR,
 237         .minor  = DRIVER_MINOR,
 238 };
 239
 240 static int exynos_drm_platform_probe(struct platform_device *pdev)
 241 {
 242         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 243
 244         exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
 245
 246         return drm_platform_init(&exynos_drm_driver, pdev);
 247 }
 248
 249 static int exynos_drm_platform_remove(struct platform_device *pdev)
 250 {
 251         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 252
 253         drm_platform_exit(&exynos_drm_driver, pdev);
 254
 255         return 0;
 256 }
 257
 258 static struct platform_driver exynos_drm_platform_driver = {
 259         .probe          = exynos_drm_platform_probe,
 260         .remove         = __devexit_p(exynos_drm_platform_remove),
 261         .driver         = {
 262                 .owner  = THIS_MODULE,
 263                 .name   = DRIVER_NAME,
 264         },
 265 };
 266
 267 static int __init exynos_drm_init(void)
 268 {
 269         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 270
 271         return platform_driver_register(&exynos_drm_platform_driver);
 272 }
 273
 274 static void __exit exynos_drm_exit(void)
 275 {
 276         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 277
 278         platform_driver_unregister(&exynos_drm_platform_driver);
 279 }
 280
 281 module_init(exynos_drm_init);
 282 module_exit(exynos_drm_exit);
 283
 284 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 285 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 286 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 287 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 288 MODULE_LICENSE("GPL");