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 } 434