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 struct fb_ops exynos_drm_fb_ops = { 50 .owner = THIS_MODULE, 51 .fb_fillrect = cfb_fillrect, 52 .fb_copyarea = cfb_copyarea, 53 .fb_imageblit = cfb_imageblit, 54 .fb_check_var = drm_fb_helper_check_var, 55 .fb_set_par = drm_fb_helper_set_par, 56 .fb_blank = drm_fb_helper_blank, 57 .fb_pan_display = drm_fb_helper_pan_display, 58 .fb_setcmap = drm_fb_helper_setcmap, 59 }; 60 61 static int exynos_drm_fbdev_update(struct drm_fb_helper *helper, 62 struct drm_framebuffer *fb) 63 { 64 struct fb_info *fbi = helper->fbdev; 65 struct drm_device *dev = helper->dev; 66 struct exynos_drm_gem_buf *buffer; 67 unsigned int size = fb->width * fb->height * (fb->bits_per_pixel >> 3); 68 unsigned long offset; 69 70 DRM_DEBUG_KMS("%s\n", __FILE__); 71 72 drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth); 73 drm_fb_helper_fill_var(fbi, helper, fb->width, fb->height); 74 75 /* RGB formats use only one buffer */ 76 buffer = exynos_drm_fb_buffer(fb, 0); 77 if (!buffer) { 78 DRM_LOG_KMS("buffer is null.\n"); 79 return -EFAULT; 80 } 81 82 offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3); 83 offset += fbi->var.yoffset * fb->pitches[0]; 84 85 dev->mode_config.fb_base = (resource_size_t)buffer->dma_addr; 86 fbi->screen_base = buffer->kvaddr + offset; 87 fbi->fix.smem_start = (unsigned long)(buffer->dma_addr + offset); 88 fbi->screen_size = size; 89 fbi->fix.smem_len = size; 90 91 return 0; 92 } 93 94 static int exynos_drm_fbdev_create(struct drm_fb_helper *helper, 95 struct drm_fb_helper_surface_size *sizes) 96 { 97 struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); 98 struct exynos_drm_gem_obj *exynos_gem_obj; 99 struct drm_device *dev = helper->dev; 100 struct fb_info *fbi; 101 struct drm_mode_fb_cmd2 mode_cmd = { 0 }; 102 struct platform_device *pdev = dev->platformdev; 103 unsigned long size; 104 int ret; 105 106 DRM_DEBUG_KMS("%s\n", __FILE__); 107 108 DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n", 109 sizes->surface_width, sizes->surface_height, 110 sizes->surface_bpp); 111 112 mode_cmd.width = sizes->surface_width; 113 mode_cmd.height = sizes->surface_height; 114 mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3); 115 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 116 sizes->surface_depth); 117 118 mutex_lock(&dev->struct_mutex); 119 120 fbi = framebuffer_alloc(0, &pdev->dev); 121 if (!fbi) { 122 DRM_ERROR("failed to allocate fb info.\n"); 123 ret = -ENOMEM; 124 goto out; 125 } 126 127 size = mode_cmd.pitches[0] * mode_cmd.height; 128 exynos_gem_obj = exynos_drm_gem_create(dev, size); 129 if (IS_ERR(exynos_gem_obj)) { 130 ret = PTR_ERR(exynos_gem_obj); 131 goto out; 132 } 133 134 exynos_fbdev->exynos_gem_obj = exynos_gem_obj; 135 136 helper->fb = exynos_drm_framebuffer_init(dev, &mode_cmd, 137 &exynos_gem_obj->base); 138 if (IS_ERR_OR_NULL(helper->fb)) { 139 DRM_ERROR("failed to create drm framebuffer.\n"); 140 ret = PTR_ERR(helper->fb); 141 goto out; 142 } 143 144 helper->fbdev = fbi; 145 146 fbi->par = helper; 147 fbi->flags = FBINFO_FLAG_DEFAULT; 148 fbi->fbops = &exynos_drm_fb_ops; 149 150 ret = fb_alloc_cmap(&fbi->cmap, 256, 0); 151 if (ret) { 152 DRM_ERROR("failed to allocate cmap.\n"); 153 goto out; 154 } 155 156 ret = exynos_drm_fbdev_update(helper, helper->fb); 157 if (ret < 0) { 158 fb_dealloc_cmap(&fbi->cmap); 159 goto out; 160 } 161 162 /* 163 * if failed, all resources allocated above would be released by 164 * drm_mode_config_cleanup() when drm_load() had been called prior 165 * to any specific driver such as fimd or hdmi driver. 166 */ 167 out: 168 mutex_unlock(&dev->struct_mutex); 169 return ret; 170 } 171 172 static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper, 173 struct drm_fb_helper_surface_size *sizes) 174 { 175 int ret = 0; 176 177 DRM_DEBUG_KMS("%s\n", __FILE__); 178 179 /* 180 * with !helper->fb, it means that this funcion is called first time 181 * and after that, the helper->fb would be used as clone mode. 182 */ 183 if (!helper->fb) { 184 ret = exynos_drm_fbdev_create(helper, sizes); 185 if (ret < 0) { 186 DRM_ERROR("failed to create fbdev.\n"); 187 return ret; 188 } 189 190 /* 191 * fb_helper expects a value more than 1 if succeed 192 * because register_framebuffer() should be called. 193 */ 194 ret = 1; 195 } 196 197 return ret; 198 } 199 200 static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { 201 .fb_probe = exynos_drm_fbdev_probe, 202 }; 203 204 int exynos_drm_fbdev_init(struct drm_device *dev) 205 { 206 struct exynos_drm_fbdev *fbdev; 207 struct exynos_drm_private *private = dev->dev_private; 208 struct drm_fb_helper *helper; 209 unsigned int num_crtc; 210 int ret; 211 212 DRM_DEBUG_KMS("%s\n", __FILE__); 213 214 if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) 215 return 0; 216 217 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); 218 if (!fbdev) { 219 DRM_ERROR("failed to allocate drm fbdev.\n"); 220 return -ENOMEM; 221 } 222 223 private->fb_helper = helper = &fbdev->drm_fb_helper; 224 helper->funcs = &exynos_drm_fb_helper_funcs; 225 226 num_crtc = dev->mode_config.num_crtc; 227 228 ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR); 229 if (ret < 0) { 230 DRM_ERROR("failed to initialize drm fb helper.\n"); 231 goto err_init; 232 } 233 234 ret = drm_fb_helper_single_add_all_connectors(helper); 235 if (ret < 0) { 236 DRM_ERROR("failed to register drm_fb_helper_connector.\n"); 237 goto err_setup; 238 239 } 240 241 ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); 242 if (ret < 0) { 243 DRM_ERROR("failed to set up hw configuration.\n"); 244 goto err_setup; 245 } 246 247 return 0; 248 249 err_setup: 250 drm_fb_helper_fini(helper); 251 252 err_init: 253 private->fb_helper = NULL; 254 kfree(fbdev); 255 256 return ret; 257 } 258 259 static void exynos_drm_fbdev_destroy(struct drm_device *dev, 260 struct drm_fb_helper *fb_helper) 261 { 262 struct drm_framebuffer *fb; 263 264 /* release drm framebuffer and real buffer */ 265 if (fb_helper->fb && fb_helper->fb->funcs) { 266 fb = fb_helper->fb; 267 if (fb && fb->funcs->destroy) 268 fb->funcs->destroy(fb); 269 } 270 271 /* release linux framebuffer */ 272 if (fb_helper->fbdev) { 273 struct fb_info *info; 274 int ret; 275 276 info = fb_helper->fbdev; 277 ret = unregister_framebuffer(info); 278 if (ret < 0) 279 DRM_DEBUG_KMS("failed unregister_framebuffer()\n"); 280 281 if (info->cmap.len) 282 fb_dealloc_cmap(&info->cmap); 283 284 framebuffer_release(info); 285 } 286 287 drm_fb_helper_fini(fb_helper); 288 } 289 290 void exynos_drm_fbdev_fini(struct drm_device *dev) 291 { 292 struct exynos_drm_private *private = dev->dev_private; 293 struct exynos_drm_fbdev *fbdev; 294 295 if (!private || !private->fb_helper) 296 return; 297 298 fbdev = to_exynos_fbdev(private->fb_helper); 299 300 if (fbdev->exynos_gem_obj) 301 exynos_drm_gem_destroy(fbdev->exynos_gem_obj); 302 303 exynos_drm_fbdev_destroy(dev, private->fb_helper); 304 kfree(fbdev); 305 private->fb_helper = NULL; 306 } 307 308 void exynos_drm_fbdev_restore_mode(struct drm_device *dev) 309 { 310 struct exynos_drm_private *private = dev->dev_private; 311 312 if (!private || !private->fb_helper) 313 return; 314 315 drm_fb_helper_restore_fbdev_mode(private->fb_helper); 316 } 317 318 int exynos_drm_fbdev_reinit(struct drm_device *dev) 319 { 320 struct exynos_drm_private *private = dev->dev_private; 321 struct drm_fb_helper *fb_helper; 322 int ret; 323 324 if (!private) 325 return -EINVAL; 326 327 /* 328 * if all sub drivers were unloaded then num_connector is 0 329 * so at this time, the framebuffers also should be destroyed. 330 */ 331 if (!dev->mode_config.num_connector) { 332 exynos_drm_fbdev_fini(dev); 333 return 0; 334 } 335 336 fb_helper = private->fb_helper; 337 338 if (fb_helper) { 339 struct list_head temp_list; 340 341 INIT_LIST_HEAD(&temp_list); 342 343 /* 344 * fb_helper is reintialized but kernel fb is reused 345 * so kernel_fb_list need to be backuped and restored 346 */ 347 if (!list_empty(&fb_helper->kernel_fb_list)) 348 list_replace_init(&fb_helper->kernel_fb_list, 349 &temp_list); 350 351 drm_fb_helper_fini(fb_helper); 352 353 ret = drm_fb_helper_init(dev, fb_helper, 354 dev->mode_config.num_crtc, MAX_CONNECTOR); 355 if (ret < 0) { 356 DRM_ERROR("failed to initialize drm fb helper\n"); 357 return ret; 358 } 359 360 if (!list_empty(&temp_list)) 361 list_replace(&temp_list, &fb_helper->kernel_fb_list); 362 363 ret = drm_fb_helper_single_add_all_connectors(fb_helper); 364 if (ret < 0) { 365 DRM_ERROR("failed to add fb helper to connectors\n"); 366 goto err; 367 } 368 369 ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP); 370 if (ret < 0) { 371 DRM_ERROR("failed to set up hw configuration.\n"); 372 goto err; 373 } 374 } else { 375 /* 376 * if drm_load() failed whem drm load() was called prior 377 * to specific drivers, fb_helper must be NULL and so 378 * this fuction should be called again to re-initialize and 379 * re-configure the fb helper. it means that this function 380 * has been called by the specific drivers. 381 */ 382 ret = exynos_drm_fbdev_init(dev); 383 } 384 385 return ret; 386 387 err: 388 /* 389 * if drm_load() failed when drm load() was called prior 390 * to specific drivers, the fb_helper must be NULL and so check it. 391 */ 392 if (fb_helper) 393 drm_fb_helper_fini(fb_helper); 394 395 return ret; 396 } 397 398 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 399 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 400 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 401 MODULE_DESCRIPTION("Samsung SoC DRM FBDEV Driver"); 402 MODULE_LICENSE("GPL"); 403