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 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(drm, &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 DRM_FB_HELPER_DEFAULT_OPS, 190 .fb_fillrect = drm_fb_helper_sys_fillrect, 191 .fb_copyarea = drm_fb_helper_sys_copyarea, 192 .fb_imageblit = drm_fb_helper_sys_imageblit, 193 }; 194 195 static int tegra_fbdev_probe(struct drm_fb_helper *helper, 196 struct drm_fb_helper_surface_size *sizes) 197 { 198 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper); 199 struct tegra_drm *tegra = helper->dev->dev_private; 200 struct drm_device *drm = helper->dev; 201 struct drm_mode_fb_cmd2 cmd = { 0 }; 202 unsigned int bytes_per_pixel; 203 struct drm_framebuffer *fb; 204 unsigned long offset; 205 struct fb_info *info; 206 struct tegra_bo *bo; 207 size_t size; 208 int err; 209 210 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8); 211 212 cmd.width = sizes->surface_width; 213 cmd.height = sizes->surface_height; 214 cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel, 215 tegra->pitch_align); 216 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 217 sizes->surface_depth); 218 219 size = cmd.pitches[0] * cmd.height; 220 221 bo = tegra_bo_create(drm, size, 0); 222 if (IS_ERR(bo)) 223 return PTR_ERR(bo); 224 225 info = drm_fb_helper_alloc_fbi(helper); 226 if (IS_ERR(info)) { 227 dev_err(drm->dev, "failed to allocate framebuffer info\n"); 228 drm_gem_object_unreference_unlocked(&bo->gem); 229 return PTR_ERR(info); 230 } 231 232 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1); 233 if (IS_ERR(fbdev->fb)) { 234 err = PTR_ERR(fbdev->fb); 235 dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n", 236 err); 237 drm_gem_object_unreference_unlocked(&bo->gem); 238 return PTR_ERR(fbdev->fb); 239 } 240 241 fb = &fbdev->fb->base; 242 helper->fb = fb; 243 helper->fbdev = info; 244 245 info->par = helper; 246 info->flags = FBINFO_FLAG_DEFAULT; 247 info->fbops = &tegra_fb_ops; 248 249 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth); 250 drm_fb_helper_fill_var(info, helper, fb->width, fb->height); 251 252 offset = info->var.xoffset * bytes_per_pixel + 253 info->var.yoffset * fb->pitches[0]; 254 255 if (bo->pages) { 256 bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP, 257 pgprot_writecombine(PAGE_KERNEL)); 258 if (!bo->vaddr) { 259 dev_err(drm->dev, "failed to vmap() framebuffer\n"); 260 err = -ENOMEM; 261 goto destroy; 262 } 263 } 264 265 drm->mode_config.fb_base = (resource_size_t)bo->paddr; 266 info->screen_base = (void __iomem *)bo->vaddr + offset; 267 info->screen_size = size; 268 info->fix.smem_start = (unsigned long)(bo->paddr + offset); 269 info->fix.smem_len = size; 270 271 return 0; 272 273 destroy: 274 drm_framebuffer_remove(fb); 275 return err; 276 } 277 278 static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = { 279 .fb_probe = tegra_fbdev_probe, 280 }; 281 282 static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm) 283 { 284 struct tegra_fbdev *fbdev; 285 286 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); 287 if (!fbdev) { 288 dev_err(drm->dev, "failed to allocate DRM fbdev\n"); 289 return ERR_PTR(-ENOMEM); 290 } 291 292 drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs); 293 294 return fbdev; 295 } 296 297 static void tegra_fbdev_free(struct tegra_fbdev *fbdev) 298 { 299 kfree(fbdev); 300 } 301 302 static int tegra_fbdev_init(struct tegra_fbdev *fbdev, 303 unsigned int preferred_bpp, 304 unsigned int num_crtc, 305 unsigned int max_connectors) 306 { 307 struct drm_device *drm = fbdev->base.dev; 308 int err; 309 310 err = drm_fb_helper_init(drm, &fbdev->base, max_connectors); 311 if (err < 0) { 312 dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n", 313 err); 314 return err; 315 } 316 317 err = drm_fb_helper_single_add_all_connectors(&fbdev->base); 318 if (err < 0) { 319 dev_err(drm->dev, "failed to add connectors: %d\n", err); 320 goto fini; 321 } 322 323 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp); 324 if (err < 0) { 325 dev_err(drm->dev, "failed to set initial configuration: %d\n", 326 err); 327 goto fini; 328 } 329 330 return 0; 331 332 fini: 333 drm_fb_helper_fini(&fbdev->base); 334 return err; 335 } 336 337 static void tegra_fbdev_exit(struct tegra_fbdev *fbdev) 338 { 339 drm_fb_helper_unregister_fbi(&fbdev->base); 340 341 if (fbdev->fb) 342 drm_framebuffer_remove(&fbdev->fb->base); 343 344 drm_fb_helper_fini(&fbdev->base); 345 tegra_fbdev_free(fbdev); 346 } 347 348 void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev) 349 { 350 if (fbdev) 351 drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base); 352 } 353 354 void tegra_fb_output_poll_changed(struct drm_device *drm) 355 { 356 struct tegra_drm *tegra = drm->dev_private; 357 358 if (tegra->fbdev) 359 drm_fb_helper_hotplug_event(&tegra->fbdev->base); 360 } 361 #endif 362 363 int tegra_drm_fb_prepare(struct drm_device *drm) 364 { 365 #ifdef CONFIG_DRM_FBDEV_EMULATION 366 struct tegra_drm *tegra = drm->dev_private; 367 368 tegra->fbdev = tegra_fbdev_create(drm); 369 if (IS_ERR(tegra->fbdev)) 370 return PTR_ERR(tegra->fbdev); 371 #endif 372 373 return 0; 374 } 375 376 void tegra_drm_fb_free(struct drm_device *drm) 377 { 378 #ifdef CONFIG_DRM_FBDEV_EMULATION 379 struct tegra_drm *tegra = drm->dev_private; 380 381 tegra_fbdev_free(tegra->fbdev); 382 #endif 383 } 384 385 int tegra_drm_fb_init(struct drm_device *drm) 386 { 387 #ifdef CONFIG_DRM_FBDEV_EMULATION 388 struct tegra_drm *tegra = drm->dev_private; 389 int err; 390 391 err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc, 392 drm->mode_config.num_connector); 393 if (err < 0) 394 return err; 395 #endif 396 397 return 0; 398 } 399 400 void tegra_drm_fb_exit(struct drm_device *drm) 401 { 402 #ifdef CONFIG_DRM_FBDEV_EMULATION 403 struct tegra_drm *tegra = drm->dev_private; 404 405 tegra_fbdev_exit(tegra->fbdev); 406 #endif 407 } 408 409 void tegra_drm_fb_suspend(struct drm_device *drm) 410 { 411 #ifdef CONFIG_DRM_FBDEV_EMULATION 412 struct tegra_drm *tegra = drm->dev_private; 413 414 console_lock(); 415 drm_fb_helper_set_suspend(&tegra->fbdev->base, 1); 416 console_unlock(); 417 #endif 418 } 419 420 void tegra_drm_fb_resume(struct drm_device *drm) 421 { 422 #ifdef CONFIG_DRM_FBDEV_EMULATION 423 struct tegra_drm *tegra = drm->dev_private; 424 425 console_lock(); 426 drm_fb_helper_set_suspend(&tegra->fbdev->base, 0); 427 console_unlock(); 428 #endif 429 } 430