1 /* exynos_drm_fbdev.c 2 * 3 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 4 * Authors: 5 * Inki Dae <inki.dae@samsung.com> 6 * Joonyoung Shim <jy0922.shim@samsung.com> 7 * Seung-Woo Kim <sw0312.kim@samsung.com> 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice (including the next 17 * paragraph) shall be included in all copies or substantial portions of the 18 * Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 26 * OTHER DEALINGS IN THE SOFTWARE. 27 */ 28 29 #include "drmP.h" 30 #include "drm_crtc.h" 31 #include "drm_fb_helper.h" 32 #include "drm_crtc_helper.h" 33 34 #include "exynos_drm_drv.h" 35 #include "exynos_drm_fb.h" 36 #include "exynos_drm_gem.h" 37 38 #define MAX_CONNECTOR 4 39 #define PREFERRED_BPP 32 40 41 #define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\ 42 drm_fb_helper) 43 44 struct exynos_drm_fbdev { 45 struct drm_fb_helper drm_fb_helper; 46 struct exynos_drm_gem_obj *exynos_gem_obj; 47 }; 48 49 static int exynos_drm_fbdev_set_par(struct fb_info *info) 50 { 51 struct fb_var_screeninfo *var = &info->var; 52 53 switch (var->bits_per_pixel) { 54 case 32: 55 case 24: 56 case 18: 57 case 16: 58 case 12: 59 info->fix.visual = FB_VISUAL_TRUECOLOR; 60 break; 61 case 1: 62 info->fix.visual = FB_VISUAL_MONO01; 63 break; 64 default: 65 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 66 break; 67 } 68 69 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8; 70 71 return drm_fb_helper_set_par(info); 72 } 73 74 75 static struct fb_ops exynos_drm_fb_ops = { 76 .owner = THIS_MODULE, 77 .fb_fillrect = cfb_fillrect, 78 .fb_copyarea = cfb_copyarea, 79 .fb_imageblit = cfb_imageblit, 80 .fb_check_var = drm_fb_helper_check_var, 81 .fb_set_par = exynos_drm_fbdev_set_par, 82 .fb_blank = drm_fb_helper_blank, 83 .fb_pan_display = drm_fb_helper_pan_display, 84 .fb_setcmap = drm_fb_helper_setcmap, 85 }; 86 87 static int exynos_drm_fbdev_update(struct drm_fb_helper *helper, 88 struct drm_framebuffer *fb) 89 { 90 struct fb_info *fbi = helper->fbdev; 91 struct drm_device *dev = helper->dev; 92 struct exynos_drm_gem_buf *buffer; 93 unsigned int size = fb->width * fb->height * (fb->bits_per_pixel >> 3); 94 unsigned long offset; 95 96 DRM_DEBUG_KMS("%s\n", __FILE__); 97 98 drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth); 99 drm_fb_helper_fill_var(fbi, helper, fb->width, fb->height); 100 101 /* RGB formats use only one buffer */ 102 buffer = exynos_drm_fb_buffer(fb, 0); 103 if (!buffer) { 104 DRM_LOG_KMS("buffer is null.\n"); 105 return -EFAULT; 106 } 107 108 offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3); 109 offset += fbi->var.yoffset * fb->pitches[0]; 110 111 dev->mode_config.fb_base = (resource_size_t)buffer->dma_addr; 112 fbi->screen_base = buffer->kvaddr + offset; 113 fbi->fix.smem_start = (unsigned long)(buffer->dma_addr + offset); 114 fbi->screen_size = size; 115 fbi->fix.smem_len = size; 116 117 return 0; 118 } 119 120 static int exynos_drm_fbdev_create(struct drm_fb_helper *helper, 121 struct drm_fb_helper_surface_size *sizes) 122 { 123 struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); 124 struct exynos_drm_gem_obj *exynos_gem_obj; 125 struct drm_device *dev = helper->dev; 126 struct fb_info *fbi; 127 struct drm_mode_fb_cmd2 mode_cmd = { 0 }; 128 struct platform_device *pdev = dev->platformdev; 129 unsigned long size; 130 int ret; 131 132 DRM_DEBUG_KMS("%s\n", __FILE__); 133 134 DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n", 135 sizes->surface_width, sizes->surface_height, 136 sizes->surface_bpp); 137 138 mode_cmd.width = sizes->surface_width; 139 mode_cmd.height = sizes->surface_height; 140 mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3); 141 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 142 sizes->surface_depth); 143 144 mutex_lock(&dev->struct_mutex); 145 146 fbi = framebuffer_alloc(0, &pdev->dev); 147 if (!fbi) { 148 DRM_ERROR("failed to allocate fb info.\n"); 149 ret = -ENOMEM; 150 goto out; 151 } 152 153 size = mode_cmd.pitches[0] * mode_cmd.height; 154 exynos_gem_obj = exynos_drm_gem_create(dev, size); 155 if (IS_ERR(exynos_gem_obj)) { 156 ret = PTR_ERR(exynos_gem_obj); 157 goto out; 158 } 159 160 exynos_fbdev->exynos_gem_obj = exynos_gem_obj; 161 162 helper->fb = exynos_drm_framebuffer_init(dev, &mode_cmd, 163 &exynos_gem_obj->base); 164 if (IS_ERR_OR_NULL(helper->fb)) { 165 DRM_ERROR("failed to create drm framebuffer.\n"); 166 ret = PTR_ERR(helper->fb); 167 goto out; 168 } 169 170 helper->fbdev = fbi; 171 172 fbi->par = helper; 173 fbi->flags = FBINFO_FLAG_DEFAULT; 174 fbi->fbops = &exynos_drm_fb_ops; 175 176 ret = fb_alloc_cmap(&fbi->cmap, 256, 0); 177 if (ret) { 178 DRM_ERROR("failed to allocate cmap.\n"); 179 goto out; 180 } 181 182 ret = exynos_drm_fbdev_update(helper, helper->fb); 183 if (ret < 0) { 184 fb_dealloc_cmap(&fbi->cmap); 185 goto out; 186 } 187 188 /* 189 * if failed, all resources allocated above would be released by 190 * drm_mode_config_cleanup() when drm_load() had been called prior 191 * to any specific driver such as fimd or hdmi driver. 192 */ 193 out: 194 mutex_unlock(&dev->struct_mutex); 195 return ret; 196 } 197 198 static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper, 199 struct drm_fb_helper_surface_size *sizes) 200 { 201 int ret = 0; 202 203 DRM_DEBUG_KMS("%s\n", __FILE__); 204 205 /* 206 * with !helper->fb, it means that this funcion is called first time 207 * and after that, the helper->fb would be used as clone mode. 208 */ 209 if (!helper->fb) { 210 ret = exynos_drm_fbdev_create(helper, sizes); 211 if (ret < 0) { 212 DRM_ERROR("failed to create fbdev.\n"); 213 return ret; 214 } 215 216 /* 217 * fb_helper expects a value more than 1 if succeed 218 * because register_framebuffer() should be called. 219 */ 220 ret = 1; 221 } 222 223 return ret; 224 } 225 226 static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { 227 .fb_probe = exynos_drm_fbdev_probe, 228 }; 229 230 int exynos_drm_fbdev_init(struct drm_device *dev) 231 { 232 struct exynos_drm_fbdev *fbdev; 233 struct exynos_drm_private *private = dev->dev_private; 234 struct drm_fb_helper *helper; 235 unsigned int num_crtc; 236 int ret; 237 238 DRM_DEBUG_KMS("%s\n", __FILE__); 239 240 if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) 241 return 0; 242 243 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); 244 if (!fbdev) { 245 DRM_ERROR("failed to allocate drm fbdev.\n"); 246 return -ENOMEM; 247 } 248 249 private->fb_helper = helper = &fbdev->drm_fb_helper; 250 helper->funcs = &exynos_drm_fb_helper_funcs; 251 252 num_crtc = dev->mode_config.num_crtc; 253 254 ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR); 255 if (ret < 0) { 256 DRM_ERROR("failed to initialize drm fb helper.\n"); 257 goto err_init; 258 } 259 260 ret = drm_fb_helper_single_add_all_connectors(helper); 261 if (ret < 0) { 262 DRM_ERROR("failed to register drm_fb_helper_connector.\n"); 263 goto err_setup; 264 265 } 266 267 ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); 268 if (ret < 0) { 269 DRM_ERROR("failed to set up hw configuration.\n"); 270 goto err_setup; 271 } 272 273 return 0; 274 275 err_setup: 276 drm_fb_helper_fini(helper); 277 278 err_init: 279 private->fb_helper = NULL; 280 kfree(fbdev); 281 282 return ret; 283 } 284 285 static void exynos_drm_fbdev_destroy(struct drm_device *dev, 286 struct drm_fb_helper *fb_helper) 287 { 288 struct drm_framebuffer *fb; 289 290 /* release drm framebuffer and real buffer */ 291 if (fb_helper->fb && fb_helper->fb->funcs) { 292 fb = fb_helper->fb; 293 if (fb && fb->funcs->destroy) 294 fb->funcs->destroy(fb); 295 } 296 297 /* release linux framebuffer */ 298 if (fb_helper->fbdev) { 299 struct fb_info *info; 300 int ret; 301 302 info = fb_helper->fbdev; 303 ret = unregister_framebuffer(info); 304 if (ret < 0) 305 DRM_DEBUG_KMS("failed unregister_framebuffer()\n"); 306 307 if (info->cmap.len) 308 fb_dealloc_cmap(&info->cmap); 309 310 framebuffer_release(info); 311 } 312 313 drm_fb_helper_fini(fb_helper); 314 } 315 316 void exynos_drm_fbdev_fini(struct drm_device *dev) 317 { 318 struct exynos_drm_private *private = dev->dev_private; 319 struct exynos_drm_fbdev *fbdev; 320 321 if (!private || !private->fb_helper) 322 return; 323 324 fbdev = to_exynos_fbdev(private->fb_helper); 325 326 if (fbdev->exynos_gem_obj) 327 exynos_drm_gem_destroy(fbdev->exynos_gem_obj); 328 329 exynos_drm_fbdev_destroy(dev, private->fb_helper); 330 kfree(fbdev); 331 private->fb_helper = NULL; 332 } 333 334 void exynos_drm_fbdev_restore_mode(struct drm_device *dev) 335 { 336 struct exynos_drm_private *private = dev->dev_private; 337 338 if (!private || !private->fb_helper) 339 return; 340 341 drm_fb_helper_restore_fbdev_mode(private->fb_helper); 342 } 343 344 int exynos_drm_fbdev_reinit(struct drm_device *dev) 345 { 346 struct exynos_drm_private *private = dev->dev_private; 347 struct drm_fb_helper *fb_helper; 348 int ret; 349 350 if (!private) 351 return -EINVAL; 352 353 /* 354 * if all sub drivers were unloaded then num_connector is 0 355 * so at this time, the framebuffers also should be destroyed. 356 */ 357 if (!dev->mode_config.num_connector) { 358 exynos_drm_fbdev_fini(dev); 359 return 0; 360 } 361 362 fb_helper = private->fb_helper; 363 364 if (fb_helper) { 365 struct list_head temp_list; 366 367 INIT_LIST_HEAD(&temp_list); 368 369 /* 370 * fb_helper is reintialized but kernel fb is reused 371 * so kernel_fb_list need to be backuped and restored 372 */ 373 if (!list_empty(&fb_helper->kernel_fb_list)) 374 list_replace_init(&fb_helper->kernel_fb_list, 375 &temp_list); 376 377 drm_fb_helper_fini(fb_helper); 378 379 ret = drm_fb_helper_init(dev, fb_helper, 380 dev->mode_config.num_crtc, MAX_CONNECTOR); 381 if (ret < 0) { 382 DRM_ERROR("failed to initialize drm fb helper\n"); 383 return ret; 384 } 385 386 if (!list_empty(&temp_list)) 387 list_replace(&temp_list, &fb_helper->kernel_fb_list); 388 389 ret = drm_fb_helper_single_add_all_connectors(fb_helper); 390 if (ret < 0) { 391 DRM_ERROR("failed to add fb helper to connectors\n"); 392 goto err; 393 } 394 395 ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP); 396 if (ret < 0) { 397 DRM_ERROR("failed to set up hw configuration.\n"); 398 goto err; 399 } 400 } else { 401 /* 402 * if drm_load() failed whem drm load() was called prior 403 * to specific drivers, fb_helper must be NULL and so 404 * this fuction should be called again to re-initialize and 405 * re-configure the fb helper. it means that this function 406 * has been called by the specific drivers. 407 */ 408 ret = exynos_drm_fbdev_init(dev); 409 } 410 411 return ret; 412 413 err: 414 /* 415 * if drm_load() failed when drm load() was called prior 416 * to specific drivers, the fb_helper must be NULL and so check it. 417 */ 418 if (fb_helper) 419 drm_fb_helper_fini(fb_helper); 420 421 return ret; 422 } 423 424 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 425 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 426 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 427 MODULE_DESCRIPTION("Samsung SoC DRM FBDEV Driver"); 428 MODULE_LICENSE("GPL"); 429