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