drivers/gpu/drm/tegra/fb.c

   1 /*
   2  * Copyright (C) 2012-2013 Avionic Design GmbH
   3  * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
   4  *
   5  * Based on the KMS/FB CMA helpers
   6  *   Copyright (C) 2012 Analog Device Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/console.h>
  14
  15 #include "drm.h"
  16 #include "gem.h"
  17
  18 static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
  19 {
  20         return container_of(fb, struct tegra_fb, base);
  21 }
  22
  23 #ifdef CONFIG_DRM_FBDEV_EMULATION
  24 static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
  25 {
  26         return container_of(helper, struct tegra_fbdev, base);
  27 }
  28 #endif
  29
  30 struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
  31                                     unsigned int index)
  32 {
  33         struct tegra_fb *fb = to_tegra_fb(framebuffer);
  34
  35         if (index >= framebuffer->format->num_planes)
  36                 return NULL;
  37
  38         return fb->planes[index];
  39 }
  40
  41 bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
  42 {
  43         struct tegra_fb *fb = to_tegra_fb(framebuffer);
  44
  45         if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
  46                 return true;
  47
  48         return false;
  49 }
  50
  51 int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
  52                         struct tegra_bo_tiling *tiling)
  53 {
  54         struct tegra_fb *fb = to_tegra_fb(framebuffer);
  55         uint64_t modifier = fb->base.modifier;
  56
  57         switch (modifier) {
  58         case DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED:
  59                 tiling->mode = TEGRA_BO_TILING_MODE_TILED;
  60                 tiling->value = 0;
  61                 break;
  62
  63         case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0):
  64                 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
  65                 tiling->value = 0;
  66                 break;
  67
  68         case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1):
  69                 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
  70                 tiling->value = 1;
  71                 break;
  72
  73         case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2):
  74                 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
  75                 tiling->value = 2;
  76                 break;
  77
  78         case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3):
  79                 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
  80                 tiling->value = 3;
  81                 break;
  82
  83         case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4):
  84                 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
  85                 tiling->value = 4;
  86                 break;
  87
  88         case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5):
  89                 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
  90                 tiling->value = 5;
  91                 break;
  92
  93         default:
  94                 /* TODO: handle YUV formats? */
  95                 *tiling = fb->planes[0]->tiling;
  96                 break;
  97         }
  98
  99         return 0;
 100 }
 101
 102 static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
 103 {
 104         struct tegra_fb *fb = to_tegra_fb(framebuffer);
 105         unsigned int i;
 106
 107         for (i = 0; i < fb->num_planes; i++) {
 108                 struct tegra_bo *bo = fb->planes[i];
 109
 110                 if (bo) {
 111                         if (bo->pages)
 112                                 vunmap(bo->vaddr);
 113
 114                         drm_gem_object_put_unlocked(&bo->gem);
 115                 }
 116         }
 117
 118         drm_framebuffer_cleanup(framebuffer);
 119         kfree(fb->planes);
 120         kfree(fb);
 121 }
 122
 123 static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
 124                                   struct drm_file *file, unsigned int *handle)
 125 {
 126         struct tegra_fb *fb = to_tegra_fb(framebuffer);
 127
 128         return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
 129 }
 130
 131 static const struct drm_framebuffer_funcs tegra_fb_funcs = {
 132         .destroy = tegra_fb_destroy,
 133         .create_handle = tegra_fb_create_handle,
 134 };
 135
 136 static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
 137                                        const struct drm_mode_fb_cmd2 *mode_cmd,
 138                                        struct tegra_bo **planes,
 139                                        unsigned int num_planes)
 140 {
 141         struct tegra_fb *fb;
 142         unsigned int i;
 143         int err;
 144
 145         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 146         if (!fb)
 147                 return ERR_PTR(-ENOMEM);
 148
 149         fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
 150         if (!fb->planes) {
 151                 kfree(fb);
 152                 return ERR_PTR(-ENOMEM);
 153         }
 154
 155         fb->num_planes = num_planes;
 156
 157         drm_helper_mode_fill_fb_struct(drm, &fb->base, mode_cmd);
 158
 159         for (i = 0; i < fb->num_planes; i++)
 160                 fb->planes[i] = planes[i];
 161
 162         err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
 163         if (err < 0) {
 164                 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
 165                         err);
 166                 kfree(fb->planes);
 167                 kfree(fb);
 168                 return ERR_PTR(err);
 169         }
 170
 171         return fb;
 172 }
 173
 174 struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
 175                                         struct drm_file *file,
 176                                         const struct drm_mode_fb_cmd2 *cmd)
 177 {
 178         unsigned int hsub, vsub, i;
 179         struct tegra_bo *planes[4];
 180         struct drm_gem_object *gem;
 181         struct tegra_fb *fb;
 182         int err;
 183
 184         hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
 185         vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
 186
 187         for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
 188                 unsigned int width = cmd->width / (i ? hsub : 1);
 189                 unsigned int height = cmd->height / (i ? vsub : 1);
 190                 unsigned int size, bpp;
 191
 192                 gem = drm_gem_object_lookup(file, cmd->handles[i]);
 193                 if (!gem) {
 194                         err = -ENXIO;
 195                         goto unreference;
 196                 }
 197
 198                 bpp = drm_format_plane_cpp(cmd->pixel_format, i);
 199
 200                 size = (height - 1) * cmd->pitches[i] +
 201                        width * bpp + cmd->offsets[i];
 202
 203                 if (gem->size < size) {
 204                         err = -EINVAL;
 205                         goto unreference;
 206                 }
 207
 208                 planes[i] = to_tegra_bo(gem);
 209         }
 210
 211         fb = tegra_fb_alloc(drm, cmd, planes, i);
 212         if (IS_ERR(fb)) {
 213                 err = PTR_ERR(fb);
 214                 goto unreference;
 215         }
 216
 217         return &fb->base;
 218
 219 unreference:
 220         while (i--)
 221                 drm_gem_object_put_unlocked(&planes[i]->gem);
 222
 223         return ERR_PTR(err);
 224 }
 225
 226 #ifdef CONFIG_DRM_FBDEV_EMULATION
 227 static struct fb_ops tegra_fb_ops = {
 228         .owner = THIS_MODULE,
 229         DRM_FB_HELPER_DEFAULT_OPS,
 230         .fb_fillrect = drm_fb_helper_sys_fillrect,
 231         .fb_copyarea = drm_fb_helper_sys_copyarea,
 232         .fb_imageblit = drm_fb_helper_sys_imageblit,
 233 };
 234
 235 static int tegra_fbdev_probe(struct drm_fb_helper *helper,
 236                              struct drm_fb_helper_surface_size *sizes)
 237 {
 238         struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
 239         struct tegra_drm *tegra = helper->dev->dev_private;
 240         struct drm_device *drm = helper->dev;
 241         struct drm_mode_fb_cmd2 cmd = { 0 };
 242         unsigned int bytes_per_pixel;
 243         struct drm_framebuffer *fb;
 244         unsigned long offset;
 245         struct fb_info *info;
 246         struct tegra_bo *bo;
 247         size_t size;
 248         int err;
 249
 250         bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
 251
 252         cmd.width = sizes->surface_width;
 253         cmd.height = sizes->surface_height;
 254         cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
 255                                   tegra->pitch_align);
 256
 257         cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 258                                                      sizes->surface_depth);
 259
 260         size = cmd.pitches[0] * cmd.height;
 261
 262         bo = tegra_bo_create(drm, size, 0);
 263         if (IS_ERR(bo))
 264                 return PTR_ERR(bo);
 265
 266         info = drm_fb_helper_alloc_fbi(helper);
 267         if (IS_ERR(info)) {
 268                 dev_err(drm->dev, "failed to allocate framebuffer info\n");
 269                 drm_gem_object_put_unlocked(&bo->gem);
 270                 return PTR_ERR(info);
 271         }
 272
 273         fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
 274         if (IS_ERR(fbdev->fb)) {
 275                 err = PTR_ERR(fbdev->fb);
 276                 dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
 277                         err);
 278                 drm_gem_object_put_unlocked(&bo->gem);
 279                 return PTR_ERR(fbdev->fb);
 280         }
 281
 282         fb = &fbdev->fb->base;
 283         helper->fb = fb;
 284         helper->fbdev = info;
 285
 286         info->par = helper;
 287         info->flags = FBINFO_FLAG_DEFAULT;
 288         info->fbops = &tegra_fb_ops;
 289
 290         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 291         drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
 292
 293         offset = info->var.xoffset * bytes_per_pixel +
 294                  info->var.yoffset * fb->pitches[0];
 295
 296         if (bo->pages) {
 297                 bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
 298                                  pgprot_writecombine(PAGE_KERNEL));
 299                 if (!bo->vaddr) {
 300                         dev_err(drm->dev, "failed to vmap() framebuffer\n");
 301                         err = -ENOMEM;
 302                         goto destroy;
 303                 }
 304         }
 305
 306         drm->mode_config.fb_base = (resource_size_t)bo->paddr;
 307         info->screen_base = (void __iomem *)bo->vaddr + offset;
 308         info->screen_size = size;
 309         info->fix.smem_start = (unsigned long)(bo->paddr + offset);
 310         info->fix.smem_len = size;
 311
 312         return 0;
 313
 314 destroy:
 315         drm_framebuffer_remove(fb);
 316         return err;
 317 }
 318
 319 static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
 320         .fb_probe = tegra_fbdev_probe,
 321 };
 322
 323 static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
 324 {
 325         struct tegra_fbdev *fbdev;
 326
 327         fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
 328         if (!fbdev) {
 329                 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
 330                 return ERR_PTR(-ENOMEM);
 331         }
 332
 333         drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
 334
 335         return fbdev;
 336 }
 337
 338 static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
 339 {
 340         kfree(fbdev);
 341 }
 342
 343 static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
 344                             unsigned int preferred_bpp,
 345                             unsigned int num_crtc,
 346                             unsigned int max_connectors)
 347 {
 348         struct drm_device *drm = fbdev->base.dev;
 349         int err;
 350
 351         err = drm_fb_helper_init(drm, &fbdev->base, max_connectors);
 352         if (err < 0) {
 353                 dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
 354                         err);
 355                 return err;
 356         }
 357
 358         err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
 359         if (err < 0) {
 360                 dev_err(drm->dev, "failed to add connectors: %d\n", err);
 361                 goto fini;
 362         }
 363
 364         err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
 365         if (err < 0) {
 366                 dev_err(drm->dev, "failed to set initial configuration: %d\n",
 367                         err);
 368                 goto fini;
 369         }
 370
 371         return 0;
 372
 373 fini:
 374         drm_fb_helper_fini(&fbdev->base);
 375         return err;
 376 }
 377
 378 static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
 379 {
 380         drm_fb_helper_unregister_fbi(&fbdev->base);
 381
 382         if (fbdev->fb)
 383                 drm_framebuffer_remove(&fbdev->fb->base);
 384
 385         drm_fb_helper_fini(&fbdev->base);
 386         tegra_fbdev_free(fbdev);
 387 }
 388 #endif
 389
 390 int tegra_drm_fb_prepare(struct drm_device *drm)
 391 {
 392 #ifdef CONFIG_DRM_FBDEV_EMULATION
 393         struct tegra_drm *tegra = drm->dev_private;
 394
 395         tegra->fbdev = tegra_fbdev_create(drm);
 396         if (IS_ERR(tegra->fbdev))
 397                 return PTR_ERR(tegra->fbdev);
 398 #endif
 399
 400         return 0;
 401 }
 402
 403 void tegra_drm_fb_free(struct drm_device *drm)
 404 {
 405 #ifdef CONFIG_DRM_FBDEV_EMULATION
 406         struct tegra_drm *tegra = drm->dev_private;
 407
 408         tegra_fbdev_free(tegra->fbdev);
 409 #endif
 410 }
 411
 412 int tegra_drm_fb_init(struct drm_device *drm)
 413 {
 414 #ifdef CONFIG_DRM_FBDEV_EMULATION
 415         struct tegra_drm *tegra = drm->dev_private;
 416         int err;
 417
 418         err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
 419                                drm->mode_config.num_connector);
 420         if (err < 0)
 421                 return err;
 422 #endif
 423
 424         return 0;
 425 }
 426
 427 void tegra_drm_fb_exit(struct drm_device *drm)
 428 {
 429 #ifdef CONFIG_DRM_FBDEV_EMULATION
 430         struct tegra_drm *tegra = drm->dev_private;
 431
 432         tegra_fbdev_exit(tegra->fbdev);
 433 #endif
 434 }
 435
 436 void tegra_drm_fb_suspend(struct drm_device *drm)
 437 {
 438 #ifdef CONFIG_DRM_FBDEV_EMULATION
 439         struct tegra_drm *tegra = drm->dev_private;
 440
 441         console_lock();
 442         drm_fb_helper_set_suspend(&tegra->fbdev->base, 1);
 443         console_unlock();
 444 #endif
 445 }
 446
 447 void tegra_drm_fb_resume(struct drm_device *drm)
 448 {
 449 #ifdef CONFIG_DRM_FBDEV_EMULATION
 450         struct tegra_drm *tegra = drm->dev_private;
 451
 452         console_lock();
 453         drm_fb_helper_set_suspend(&tegra->fbdev->base, 0);
 454         console_unlock();
 455 #endif
 456 }