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 = drm_fb_helper_sys_fillrect,
 188         .fb_copyarea = drm_fb_helper_sys_copyarea,
 189         .fb_imageblit = drm_fb_helper_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 = drm_fb_helper_alloc_fbi(helper);
 228         if (IS_ERR(info)) {
 229                 dev_err(drm->dev, "failed to allocate framebuffer info\n");
 230                 drm_gem_object_unreference_unlocked(&bo->gem);
 231                 return PTR_ERR(info);
 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         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 252         drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
 253
 254         offset = info->var.xoffset * bytes_per_pixel +
 255                  info->var.yoffset * fb->pitches[0];
 256
 257         if (bo->pages) {
 258                 bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
 259                                  pgprot_writecombine(PAGE_KERNEL));
 260                 if (!bo->vaddr) {
 261                         dev_err(drm->dev, "failed to vmap() framebuffer\n");
 262                         err = -ENOMEM;
 263                         goto destroy;
 264                 }
 265         }
 266
 267         drm->mode_config.fb_base = (resource_size_t)bo->paddr;
 268         info->screen_base = (void __iomem *)bo->vaddr + offset;
 269         info->screen_size = size;
 270         info->fix.smem_start = (unsigned long)(bo->paddr + offset);
 271         info->fix.smem_len = size;
 272
 273         return 0;
 274
 275 destroy:
 276         drm_framebuffer_unregister_private(fb);
 277         tegra_fb_destroy(fb);
 278 release:
 279         drm_fb_helper_release_fbi(helper);
 280         return err;
 281 }
 282
 283 static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
 284         .fb_probe = tegra_fbdev_probe,
 285 };
 286
 287 static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
 288 {
 289         struct tegra_fbdev *fbdev;
 290
 291         fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
 292         if (!fbdev) {
 293                 dev_err(drm->dev, "failed to allocate DRM fbdev\n");
 294                 return ERR_PTR(-ENOMEM);
 295         }
 296
 297         drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
 298
 299         return fbdev;
 300 }
 301
 302 static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
 303 {
 304         kfree(fbdev);
 305 }
 306
 307 static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
 308                             unsigned int preferred_bpp,
 309                             unsigned int num_crtc,
 310                             unsigned int max_connectors)
 311 {
 312         struct drm_device *drm = fbdev->base.dev;
 313         int err;
 314
 315         err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
 316         if (err < 0) {
 317                 dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
 318                         err);
 319                 return err;
 320         }
 321
 322         err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
 323         if (err < 0) {
 324                 dev_err(drm->dev, "failed to add connectors: %d\n", err);
 325                 goto fini;
 326         }
 327
 328         err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
 329         if (err < 0) {
 330                 dev_err(drm->dev, "failed to set initial configuration: %d\n",
 331                         err);
 332                 goto fini;
 333         }
 334
 335         return 0;
 336
 337 fini:
 338         drm_fb_helper_fini(&fbdev->base);
 339         return err;
 340 }
 341
 342 static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
 343 {
 344         drm_fb_helper_unregister_fbi(&fbdev->base);
 345         drm_fb_helper_release_fbi(&fbdev->base);
 346
 347         if (fbdev->fb) {
 348                 drm_framebuffer_unregister_private(&fbdev->fb->base);
 349                 drm_framebuffer_remove(&fbdev->fb->base);
 350         }
 351
 352         drm_fb_helper_fini(&fbdev->base);
 353         tegra_fbdev_free(fbdev);
 354 }
 355
 356 void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
 357 {
 358         if (fbdev)
 359                 drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
 360 }
 361
 362 void tegra_fb_output_poll_changed(struct drm_device *drm)
 363 {
 364         struct tegra_drm *tegra = drm->dev_private;
 365
 366         if (tegra->fbdev)
 367                 drm_fb_helper_hotplug_event(&tegra->fbdev->base);
 368 }
 369 #endif
 370
 371 int tegra_drm_fb_prepare(struct drm_device *drm)
 372 {
 373 #ifdef CONFIG_DRM_TEGRA_FBDEV
 374         struct tegra_drm *tegra = drm->dev_private;
 375
 376         tegra->fbdev = tegra_fbdev_create(drm);
 377         if (IS_ERR(tegra->fbdev))
 378                 return PTR_ERR(tegra->fbdev);
 379 #endif
 380
 381         return 0;
 382 }
 383
 384 void tegra_drm_fb_free(struct drm_device *drm)
 385 {
 386 #ifdef CONFIG_DRM_TEGRA_FBDEV
 387         struct tegra_drm *tegra = drm->dev_private;
 388
 389         tegra_fbdev_free(tegra->fbdev);
 390 #endif
 391 }
 392
 393 int tegra_drm_fb_init(struct drm_device *drm)
 394 {
 395 #ifdef CONFIG_DRM_TEGRA_FBDEV
 396         struct tegra_drm *tegra = drm->dev_private;
 397         int err;
 398
 399         err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
 400                                drm->mode_config.num_connector);
 401         if (err < 0)
 402                 return err;
 403 #endif
 404
 405         return 0;
 406 }
 407
 408 void tegra_drm_fb_exit(struct drm_device *drm)
 409 {
 410 #ifdef CONFIG_DRM_TEGRA_FBDEV
 411         struct tegra_drm *tegra = drm->dev_private;
 412
 413         tegra_fbdev_exit(tegra->fbdev);
 414 #endif
 415 }