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 static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper) 22 { 23 return container_of(helper, struct tegra_fbdev, base); 24 } 25 26 struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer, 27 unsigned int index) 28 { 29 struct tegra_fb *fb = to_tegra_fb(framebuffer); 30 31 if (index >= drm_format_num_planes(framebuffer->pixel_format)) 32 return NULL; 33 34 return fb->planes[index]; 35 } 36 37 bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer) 38 { 39 struct tegra_fb *fb = to_tegra_fb(framebuffer); 40 41 if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP) 42 return true; 43 44 return false; 45 } 46 47 bool tegra_fb_is_tiled(struct drm_framebuffer *framebuffer) 48 { 49 struct tegra_fb *fb = to_tegra_fb(framebuffer); 50 51 if (fb->planes[0]->flags & TEGRA_BO_TILED) 52 return true; 53 54 return false; 55 } 56 57 static void tegra_fb_destroy(struct drm_framebuffer *framebuffer) 58 { 59 struct tegra_fb *fb = to_tegra_fb(framebuffer); 60 unsigned int i; 61 62 for (i = 0; i < fb->num_planes; i++) { 63 struct tegra_bo *bo = fb->planes[i]; 64 65 if (bo) 66 drm_gem_object_unreference_unlocked(&bo->gem); 67 } 68 69 drm_framebuffer_cleanup(framebuffer); 70 kfree(fb->planes); 71 kfree(fb); 72 } 73 74 static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer, 75 struct drm_file *file, unsigned int *handle) 76 { 77 struct tegra_fb *fb = to_tegra_fb(framebuffer); 78 79 return drm_gem_handle_create(file, &fb->planes[0]->gem, handle); 80 } 81 82 static struct drm_framebuffer_funcs tegra_fb_funcs = { 83 .destroy = tegra_fb_destroy, 84 .create_handle = tegra_fb_create_handle, 85 }; 86 87 static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm, 88 struct drm_mode_fb_cmd2 *mode_cmd, 89 struct tegra_bo **planes, 90 unsigned int num_planes) 91 { 92 struct tegra_fb *fb; 93 unsigned int i; 94 int err; 95 96 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 97 if (!fb) 98 return ERR_PTR(-ENOMEM); 99 100 fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL); 101 if (!fb->planes) 102 return ERR_PTR(-ENOMEM); 103 104 fb->num_planes = num_planes; 105 106 drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd); 107 108 for (i = 0; i < fb->num_planes; i++) 109 fb->planes[i] = planes[i]; 110 111 err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs); 112 if (err < 0) { 113 dev_err(drm->dev, "failed to initialize framebuffer: %d\n", 114 err); 115 kfree(fb->planes); 116 kfree(fb); 117 return ERR_PTR(err); 118 } 119 120 return fb; 121 } 122 123 static struct drm_framebuffer *tegra_fb_create(struct drm_device *drm, 124 struct drm_file *file, 125 struct drm_mode_fb_cmd2 *cmd) 126 { 127 unsigned int hsub, vsub, i; 128 struct tegra_bo *planes[4]; 129 struct drm_gem_object *gem; 130 struct tegra_fb *fb; 131 int err; 132 133 hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format); 134 vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format); 135 136 for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) { 137 unsigned int width = cmd->width / (i ? hsub : 1); 138 unsigned int height = cmd->height / (i ? vsub : 1); 139 unsigned int size, bpp; 140 141 gem = drm_gem_object_lookup(drm, file, cmd->handles[i]); 142 if (!gem) { 143 err = -ENXIO; 144 goto unreference; 145 } 146 147 bpp = drm_format_plane_cpp(cmd->pixel_format, i); 148 149 size = (height - 1) * cmd->pitches[i] + 150 width * bpp + cmd->offsets[i]; 151 152 if (gem->size < size) { 153 err = -EINVAL; 154 goto unreference; 155 } 156 157 planes[i] = to_tegra_bo(gem); 158 } 159 160 fb = tegra_fb_alloc(drm, cmd, planes, i); 161 if (IS_ERR(fb)) { 162 err = PTR_ERR(fb); 163 goto unreference; 164 } 165 166 return &fb->base; 167 168 unreference: 169 while (i--) 170 drm_gem_object_unreference_unlocked(&planes[i]->gem); 171 172 return ERR_PTR(err); 173 } 174 175 static struct fb_ops tegra_fb_ops = { 176 .owner = THIS_MODULE, 177 .fb_fillrect = sys_fillrect, 178 .fb_copyarea = sys_copyarea, 179 .fb_imageblit = sys_imageblit, 180 .fb_check_var = drm_fb_helper_check_var, 181 .fb_set_par = drm_fb_helper_set_par, 182 .fb_blank = drm_fb_helper_blank, 183 .fb_pan_display = drm_fb_helper_pan_display, 184 .fb_setcmap = drm_fb_helper_setcmap, 185 }; 186 187 static int tegra_fbdev_probe(struct drm_fb_helper *helper, 188 struct drm_fb_helper_surface_size *sizes) 189 { 190 struct tegra_fbdev *fbdev = to_tegra_fbdev(helper); 191 struct drm_device *drm = helper->dev; 192 struct drm_mode_fb_cmd2 cmd = { 0 }; 193 unsigned int bytes_per_pixel; 194 struct drm_framebuffer *fb; 195 unsigned long offset; 196 struct fb_info *info; 197 struct tegra_bo *bo; 198 size_t size; 199 int err; 200 201 bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8); 202 203 cmd.width = sizes->surface_width; 204 cmd.height = sizes->surface_height; 205 cmd.pitches[0] = sizes->surface_width * bytes_per_pixel; 206 cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 207 sizes->surface_depth); 208 209 size = cmd.pitches[0] * cmd.height; 210 211 bo = tegra_bo_create(drm, size, 0); 212 if (IS_ERR(bo)) 213 return PTR_ERR(bo); 214 215 info = framebuffer_alloc(0, drm->dev); 216 if (!info) { 217 dev_err(drm->dev, "failed to allocate framebuffer info\n"); 218 tegra_bo_free_object(&bo->gem); 219 return -ENOMEM; 220 } 221 222 fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1); 223 if (IS_ERR(fbdev->fb)) { 224 dev_err(drm->dev, "failed to allocate DRM framebuffer\n"); 225 err = PTR_ERR(fbdev->fb); 226 goto release; 227 } 228 229 fb = &fbdev->fb->base; 230 helper->fb = fb; 231 helper->fbdev = info; 232 233 info->par = helper; 234 info->flags = FBINFO_FLAG_DEFAULT; 235 info->fbops = &tegra_fb_ops; 236 237 err = fb_alloc_cmap(&info->cmap, 256, 0); 238 if (err < 0) { 239 dev_err(drm->dev, "failed to allocate color map: %d\n", err); 240 goto destroy; 241 } 242 243 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 244 drm_fb_helper_fill_var(info, helper, fb->width, fb->height); 245 246 offset = info->var.xoffset * bytes_per_pixel + 247 info->var.yoffset * fb->pitches[0]; 248 249 drm->mode_config.fb_base = (resource_size_t)bo->paddr; 250 info->screen_base = (void __iomem *)bo->vaddr + offset; 251 info->screen_size = size; 252 info->fix.smem_start = (unsigned long)(bo->paddr + offset); 253 info->fix.smem_len = size; 254 255 return 0; 256 257 destroy: 258 drm_framebuffer_unregister_private(fb); 259 tegra_fb_destroy(fb); 260 release: 261 framebuffer_release(info); 262 return err; 263 } 264 265 static struct drm_fb_helper_funcs tegra_fb_helper_funcs = { 266 .fb_probe = tegra_fbdev_probe, 267 }; 268 269 static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm, 270 unsigned int preferred_bpp, 271 unsigned int num_crtc, 272 unsigned int max_connectors) 273 { 274 struct drm_fb_helper *helper; 275 struct tegra_fbdev *fbdev; 276 int err; 277 278 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); 279 if (!fbdev) { 280 dev_err(drm->dev, "failed to allocate DRM fbdev\n"); 281 return ERR_PTR(-ENOMEM); 282 } 283 284 fbdev->base.funcs = &tegra_fb_helper_funcs; 285 helper = &fbdev->base; 286 287 err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors); 288 if (err < 0) { 289 dev_err(drm->dev, "failed to initialize DRM FB helper\n"); 290 goto free; 291 } 292 293 err = drm_fb_helper_single_add_all_connectors(&fbdev->base); 294 if (err < 0) { 295 dev_err(drm->dev, "failed to add connectors\n"); 296 goto fini; 297 } 298 299 drm_helper_disable_unused_functions(drm); 300 301 err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp); 302 if (err < 0) { 303 dev_err(drm->dev, "failed to set initial configuration\n"); 304 goto fini; 305 } 306 307 return fbdev; 308 309 fini: 310 drm_fb_helper_fini(&fbdev->base); 311 free: 312 kfree(fbdev); 313 return ERR_PTR(err); 314 } 315 316 static void tegra_fbdev_free(struct tegra_fbdev *fbdev) 317 { 318 struct fb_info *info = fbdev->base.fbdev; 319 320 if (info) { 321 int err; 322 323 err = unregister_framebuffer(info); 324 if (err < 0) 325 DRM_DEBUG_KMS("failed to unregister framebuffer\n"); 326 327 if (info->cmap.len) 328 fb_dealloc_cmap(&info->cmap); 329 330 framebuffer_release(info); 331 } 332 333 if (fbdev->fb) { 334 drm_framebuffer_unregister_private(&fbdev->fb->base); 335 tegra_fb_destroy(&fbdev->fb->base); 336 } 337 338 drm_fb_helper_fini(&fbdev->base); 339 kfree(fbdev); 340 } 341 342 static void tegra_fb_output_poll_changed(struct drm_device *drm) 343 { 344 struct tegra_drm *tegra = drm->dev_private; 345 346 if (tegra->fbdev) 347 drm_fb_helper_hotplug_event(&tegra->fbdev->base); 348 } 349 350 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = { 351 .fb_create = tegra_fb_create, 352 .output_poll_changed = tegra_fb_output_poll_changed, 353 }; 354 355 int tegra_drm_fb_init(struct drm_device *drm) 356 { 357 struct tegra_drm *tegra = drm->dev_private; 358 struct tegra_fbdev *fbdev; 359 360 drm->mode_config.min_width = 0; 361 drm->mode_config.min_height = 0; 362 363 drm->mode_config.max_width = 4096; 364 drm->mode_config.max_height = 4096; 365 366 drm->mode_config.funcs = &tegra_drm_mode_funcs; 367 368 fbdev = tegra_fbdev_create(drm, 32, drm->mode_config.num_crtc, 369 drm->mode_config.num_connector); 370 if (IS_ERR(fbdev)) 371 return PTR_ERR(fbdev); 372 373 tegra->fbdev = fbdev; 374 375 return 0; 376 } 377 378 void tegra_drm_fb_exit(struct drm_device *drm) 379 { 380 struct tegra_drm *tegra = drm->dev_private; 381 382 tegra_fbdev_free(tegra->fbdev); 383 } 384 385 void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev) 386 { 387 if (fbdev) { 388 drm_modeset_lock_all(fbdev->base.dev); 389 drm_fb_helper_restore_fbdev_mode(&fbdev->base); 390 drm_modeset_unlock_all(fbdev->base.dev); 391 } 392 } 393