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 } 457