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