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 (fourcc_mod_tegra_mod(modifier)) {
  58         case NV_FORMAT_MOD_TEGRA_TILED:
  59                 tiling->mode = TEGRA_BO_TILING_MODE_TILED;
  60                 tiling->value = 0;
  61                 break;
  62
  63         case NV_FORMAT_MOD_TEGRA_16BX2_BLOCK(0):
  64                 tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
  65                 tiling->value = fourcc_mod_tegra_param(modifier);
  66                 if (tiling->value > 5)
  67                         return -EINVAL;
  68                 break;
  69
  70         default:
  71                 /* TODO: handle YUV formats? */
  72                 *tiling = fb->planes[0]->tiling;
  73                 break;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
  80 {
  81         struct tegra_fb *fb = to_tegra_fb(framebuffer);
  82         unsigned int i;
  83
  84         for (i = 0; i < fb->num_planes; i++) {
  85                 struct tegra_bo *bo = fb->planes[i];
  86
  87                 if (bo) {
  88                         if (bo->pages)
  89                                 vunmap(bo->vaddr);
  90
  91                         drm_gem_object_unreference_unlocked(&bo->gem);
  92                 }
  93         }
  94
  95         drm_framebuffer_cleanup(framebuffer);
  96         kfree(fb->planes);
  97         kfree(fb);
  98 }
  99
 100 static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
 101                                   struct drm_file *file, unsigned int *handle)
 102 {
 103         struct tegra_fb *fb = to_tegra_fb(framebuffer);
 104
 105         return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
 106 }
 107
 108 static const struct drm_framebuffer_funcs tegra_fb_funcs = {
 109         .destroy = tegra_fb_destroy,
 110         .create_handle = tegra_fb_create_handle,
 111 };
 112
 113 static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
 114                                        const struct drm_mode_fb_cmd2 *mode_cmd,
 115                                        struct tegra_bo **planes,
 116                                        unsigned int num_planes)
 117 {
 118         struct tegra_fb *fb;
 119         unsigned int i;
 120         int err;
 121
 122         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 123         if (!fb)
 124                 return ERR_PTR(-ENOMEM);
 125
 126         fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
 127         if (!fb->planes) {
 128                 kfree(fb);
 129                 return ERR_PTR(-ENOMEM);
 130         }
 131
 132         fb->num_planes = num_planes;
 133
 134         drm_helper_mode_fill_fb_struct(drm, &fb->base, mode_cmd);
 135
 136         for (i = 0; i < fb->num_planes; i++)
 137                 fb->planes[i] = planes[i];
 138
 139         err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
 140         if (err < 0) {
 141                 dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
 142                         err);
 143                 kfree(fb->planes);
 144                 kfree(fb);
 145                 return ERR_PTR(err);
 146         }
 147
 148         return fb;
 149 }
 150
 151 struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
 152                                         struct drm_file *file,
 153                                         const struct drm_mode_fb_cmd2 *cmd)
 154 {
 155         unsigned int hsub, vsub, i;
 156         struct tegra_bo *planes[4];
 157         struct drm_gem_object *gem;
 158         struct tegra_fb *fb;
 159         int err;
 160
 161         hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
 162         vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
 163
 164         for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
 165                 unsigned int width = cmd->width / (i ? hsub : 1);
 166                 unsigned int height = cmd->height / (i ? vsub : 1);
 167                 unsigned int size, bpp;
 168
 169                 gem = drm_gem_object_lookup(file, cmd->handles[i]);
 170                 if (!gem) {
 171                         err = -ENXIO;
 172                         goto unreference;
 173                 }
 174
 175                 bpp = drm_format_plane_cpp(cmd->pixel_format, i);
 176
 177                 size = (height - 1) * cmd->pitches[i] +
 178                        width * bpp + cmd->offsets[i];
 179
 180                 if (gem->size < size) {
 181                         err = -EINVAL;
 182                         goto unreference;
 183                 }
 184
 185                 planes[i] = to_tegra_bo(gem);
 186         }
 187
 188         fb = tegra_fb_alloc(drm, cmd, planes, i);
 189         if (IS_ERR(fb)) {
 190                 err = PTR_ERR(fb);
 191                 goto unreference;
 192         }
 193
 194         return &fb->base;
 195
 196 unreference:
 197         while (i--)
 198                 drm_gem_object_unreference_unlocked(&planes[i]->gem);
 199
 200         return ERR_PTR(err);
 201 }
 202
 203 #ifdef CONFIG_DRM_FBDEV_EMULATION
 204 static struct fb_ops tegra_fb_ops = {
 205         .owner = THIS_MODULE,
 206         DRM_FB_HELPER_DEFAULT_OPS,
 207         .fb_fillrect = drm_fb_helper_sys_fillrect,
 208         .fb_copyarea = drm_fb_helper_sys_copyarea,
 209         .fb_imageblit = drm_fb_helper_sys_imageblit,
 210 };
 211
 212 static int tegra_fbdev_probe(struct drm_fb_helper *helper,
 213                              struct drm_fb_helper_surface_size *sizes)
 214 {
 215         struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
 216         struct tegra_drm *tegra = helper->dev->dev_private;
 217         struct drm_device *drm = helper->dev;
 218         struct drm_mode_fb_cmd2 cmd = { 0 };
 219         unsigned int bytes_per_pixel;
 220         struct drm_framebuffer *fb;
 221         unsigned long offset;
 222         struct fb_info *info;
 223         struct tegra_bo *bo;
 224         size_t size;
 225         int err;
 226
 227         bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
 228
 229         cmd.width = sizes->surface_width;
 230         cmd.height = sizes->surface_height;
 231         cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
 232                                   tegra->pitch_align);
 233         cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 234                                                      sizes->surface_depth);
 235
 236         size = cmd.pitches[0] * cmd.height;
 237
 238         bo = tegra_bo_create(drm, size, 0);
 239         if (IS_ERR(bo))
 240                 return PTR_ERR(bo);
 241
 242         info = drm_fb_helper_alloc_fbi(helper);
 243         if (IS_ERR(info)) {
 244                 dev_err(drm->dev, "failed to allocate framebuffer info\n");
 245                 drm_gem_object_unreference_unlocked(&bo->gem);
 246                 return PTR_ERR(info);
 247         }
 248
 249         fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
 250         if (IS_ERR(fbdev->fb)) {
 251                 err = PTR_ERR(fbdev->fb);
 252                 dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
 253                         err);
 254                 drm_gem_object_unreference_unlocked(&bo->gem);
 255                 return PTR_ERR(fbdev->fb);
 256         }
 257
 258         fb = &fbdev->fb->base;
 259         helper->fb = fb;
 260         helper->fbdev = info;
 261
 262         info->par = helper;
 263         info->flags = FBINFO_FLAG_DEFAULT;
 264         info->fbops = &tegra_fb_ops;
 265
 266         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 267         drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
 268
 269         offset = info->var.xoffset * bytes_per_pixel +
 270                  info->var.yoffset * fb->pitches[0];
 271
 272         if (bo->pages) {
 273                 bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
 274                                  pgprot_writecombine(PAGE_KERNEL));
 275                 if (!bo->vaddr) {
 276                         dev_err(drm->dev, "failed to vmap() framebuffer\n");
 277                         err = -ENOMEM;
 278                         goto destroy;
 279                 }
 280         }
 281
 282         drm->mode_config.fb_base = (resource_size_t)bo->paddr;
 283         info->screen_base = (void __iomem *)bo->vaddr + offset;
 284         info->screen_size = size;
 285         info->fix.smem_start = (unsigned long)(bo->paddr + offset);
 286         info->fix.smem_len = size;
 287
 288         return 0;
 289
 290 destroy:
 291         drm_framebuffer_remove(fb);
 292         return err;
 293 }
 294
 295 static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
 296         .fb_probe = tegra_fbdev_probe,
 297 };
 298
 299 static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
 300 {
 301         struct tegra_fbdev *fbdev;
 302
 303         fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
 304         if (!fbdev) {
 305                 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
 306                 return ERR_PTR(-ENOMEM);
 307         }
 308
 309         drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
 310
 311         return fbdev;
 312 }
 313
 314 static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
 315 {
 316         kfree(fbdev);
 317 }
 318
 319 static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
 320                             unsigned int preferred_bpp,
 321                             unsigned int num_crtc,
 322                             unsigned int max_connectors)
 323 {
 324         struct drm_device *drm = fbdev->base.dev;
 325         int err;
 326
 327         err = drm_fb_helper_init(drm, &fbdev->base, max_connectors);
 328         if (err < 0) {
 329                 dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
 330                         err);
 331                 return err;
 332         }
 333
 334         err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
 335         if (err < 0) {
 336                 dev_err(drm->dev, "failed to add connectors: %d\n", err);
 337                 goto fini;
 338         }
 339
 340         err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
 341         if (err < 0) {
 342                 dev_err(drm->dev, "failed to set initial configuration: %d\n",
 343                         err);
 344                 goto fini;
 345         }
 346
 347         return 0;
 348
 349 fini:
 350         drm_fb_helper_fini(&fbdev->base);
 351         return err;
 352 }
 353
 354 static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
 355 {
 356         drm_fb_helper_unregister_fbi(&fbdev->base);
 357
 358         if (fbdev->fb)
 359                 drm_framebuffer_remove(&fbdev->fb->base);
 360
 361         drm_fb_helper_fini(&fbdev->base);
 362         tegra_fbdev_free(fbdev);
 363 }
 364
 365 void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
 366 {
 367         if (fbdev)
 368                 drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
 369 }
 370
 371 void tegra_fb_output_poll_changed(struct drm_device *drm)
 372 {
 373         struct tegra_drm *tegra = drm->dev_private;
 374
 375         if (tegra->fbdev)
 376                 drm_fb_helper_hotplug_event(&tegra->fbdev->base);
 377 }
 378 #endif
 379
 380 int tegra_drm_fb_prepare(struct drm_device *drm)
 381 {
 382 #ifdef CONFIG_DRM_FBDEV_EMULATION
 383         struct tegra_drm *tegra = drm->dev_private;
 384
 385         tegra->fbdev = tegra_fbdev_create(drm);
 386         if (IS_ERR(tegra->fbdev))
 387                 return PTR_ERR(tegra->fbdev);
 388 #endif
 389
 390         return 0;
 391 }
 392
 393 void tegra_drm_fb_free(struct drm_device *drm)
 394 {
 395 #ifdef CONFIG_DRM_FBDEV_EMULATION
 396         struct tegra_drm *tegra = drm->dev_private;
 397
 398         tegra_fbdev_free(tegra->fbdev);
 399 #endif
 400 }
 401
 402 int tegra_drm_fb_init(struct drm_device *drm)
 403 {
 404 #ifdef CONFIG_DRM_FBDEV_EMULATION
 405         struct tegra_drm *tegra = drm->dev_private;
 406         int err;
 407
 408         err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
 409                                drm->mode_config.num_connector);
 410         if (err < 0)
 411                 return err;
 412 #endif
 413
 414         return 0;
 415 }
 416
 417 void tegra_drm_fb_exit(struct drm_device *drm)
 418 {
 419 #ifdef CONFIG_DRM_FBDEV_EMULATION
 420         struct tegra_drm *tegra = drm->dev_private;
 421
 422         tegra_fbdev_exit(tegra->fbdev);
 423 #endif
 424 }
 425
 426 void tegra_drm_fb_suspend(struct drm_device *drm)
 427 {
 428 #ifdef CONFIG_DRM_FBDEV_EMULATION
 429         struct tegra_drm *tegra = drm->dev_private;
 430
 431         console_lock();
 432         drm_fb_helper_set_suspend(&tegra->fbdev->base, 1);
 433         console_unlock();
 434 #endif
 435 }
 436
 437 void tegra_drm_fb_resume(struct drm_device *drm)
 438 {
 439 #ifdef CONFIG_DRM_FBDEV_EMULATION
 440         struct tegra_drm *tegra = drm->dev_private;
 441
 442         console_lock();
 443         drm_fb_helper_set_suspend(&tegra->fbdev->base, 0);
 444         console_unlock();
 445 #endif
 446 }