Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 1 | /* |
| 2 | * drm kms/fb cma (contiguous memory allocator) helper functions |
| 3 | * |
| 4 | * Copyright (C) 2012 Analog Device Inc. |
| 5 | * Author: Lars-Peter Clausen <lars@metafoo.de> |
| 6 | * |
| 7 | * Based on udl_fbdev.c |
| 8 | * Copyright (C) 2012 Red Hat |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * as published by the Free Software Foundation; either version 2 |
| 13 | * of the License, or (at your option) any later version. |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | */ |
| 19 | |
| 20 | #include <drm/drmP.h> |
| 21 | #include <drm/drm_crtc.h> |
| 22 | #include <drm/drm_fb_helper.h> |
| 23 | #include <drm/drm_crtc_helper.h> |
| 24 | #include <drm/drm_gem_cma_helper.h> |
| 25 | #include <drm/drm_fb_cma_helper.h> |
| 26 | #include <linux/module.h> |
| 27 | |
| 28 | struct drm_fb_cma { |
| 29 | struct drm_framebuffer fb; |
| 30 | struct drm_gem_cma_object *obj[4]; |
| 31 | }; |
| 32 | |
| 33 | struct drm_fbdev_cma { |
| 34 | struct drm_fb_helper fb_helper; |
| 35 | struct drm_fb_cma *fb; |
| 36 | }; |
| 37 | |
| 38 | static inline struct drm_fbdev_cma *to_fbdev_cma(struct drm_fb_helper *helper) |
| 39 | { |
| 40 | return container_of(helper, struct drm_fbdev_cma, fb_helper); |
| 41 | } |
| 42 | |
| 43 | static inline struct drm_fb_cma *to_fb_cma(struct drm_framebuffer *fb) |
| 44 | { |
| 45 | return container_of(fb, struct drm_fb_cma, fb); |
| 46 | } |
| 47 | |
| 48 | static void drm_fb_cma_destroy(struct drm_framebuffer *fb) |
| 49 | { |
| 50 | struct drm_fb_cma *fb_cma = to_fb_cma(fb); |
| 51 | int i; |
| 52 | |
| 53 | for (i = 0; i < 4; i++) { |
| 54 | if (fb_cma->obj[i]) |
| 55 | drm_gem_object_unreference_unlocked(&fb_cma->obj[i]->base); |
| 56 | } |
| 57 | |
| 58 | drm_framebuffer_cleanup(fb); |
| 59 | kfree(fb_cma); |
| 60 | } |
| 61 | |
| 62 | static int drm_fb_cma_create_handle(struct drm_framebuffer *fb, |
| 63 | struct drm_file *file_priv, unsigned int *handle) |
| 64 | { |
| 65 | struct drm_fb_cma *fb_cma = to_fb_cma(fb); |
| 66 | |
| 67 | return drm_gem_handle_create(file_priv, |
| 68 | &fb_cma->obj[0]->base, handle); |
| 69 | } |
| 70 | |
| 71 | static struct drm_framebuffer_funcs drm_fb_cma_funcs = { |
| 72 | .destroy = drm_fb_cma_destroy, |
| 73 | .create_handle = drm_fb_cma_create_handle, |
| 74 | }; |
| 75 | |
| 76 | static struct drm_fb_cma *drm_fb_cma_alloc(struct drm_device *dev, |
| 77 | struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_cma_object **obj, |
| 78 | unsigned int num_planes) |
| 79 | { |
| 80 | struct drm_fb_cma *fb_cma; |
| 81 | int ret; |
| 82 | int i; |
| 83 | |
| 84 | fb_cma = kzalloc(sizeof(*fb_cma), GFP_KERNEL); |
| 85 | if (!fb_cma) |
| 86 | return ERR_PTR(-ENOMEM); |
| 87 | |
Daniel Vetter | c7d73f6 | 2012-12-13 23:38:38 +0100 | [diff] [blame] | 88 | drm_helper_mode_fill_fb_struct(&fb_cma->fb, mode_cmd); |
| 89 | |
| 90 | for (i = 0; i < num_planes; i++) |
| 91 | fb_cma->obj[i] = obj[i]; |
| 92 | |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 93 | ret = drm_framebuffer_init(dev, &fb_cma->fb, &drm_fb_cma_funcs); |
| 94 | if (ret) { |
Masanari Iida | 8b513d0 | 2013-05-21 23:13:12 +0900 | [diff] [blame] | 95 | dev_err(dev->dev, "Failed to initialize framebuffer: %d\n", ret); |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 96 | kfree(fb_cma); |
| 97 | return ERR_PTR(ret); |
| 98 | } |
| 99 | |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 100 | return fb_cma; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * drm_fb_cma_create() - (struct drm_mode_config_funcs *)->fb_create callback function |
| 105 | * |
| 106 | * If your hardware has special alignment or pitch requirements these should be |
| 107 | * checked before calling this function. |
| 108 | */ |
| 109 | struct drm_framebuffer *drm_fb_cma_create(struct drm_device *dev, |
| 110 | struct drm_file *file_priv, struct drm_mode_fb_cmd2 *mode_cmd) |
| 111 | { |
| 112 | struct drm_fb_cma *fb_cma; |
| 113 | struct drm_gem_cma_object *objs[4]; |
| 114 | struct drm_gem_object *obj; |
| 115 | unsigned int hsub; |
| 116 | unsigned int vsub; |
| 117 | int ret; |
| 118 | int i; |
| 119 | |
| 120 | hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); |
| 121 | vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); |
| 122 | |
| 123 | for (i = 0; i < drm_format_num_planes(mode_cmd->pixel_format); i++) { |
| 124 | unsigned int width = mode_cmd->width / (i ? hsub : 1); |
| 125 | unsigned int height = mode_cmd->height / (i ? vsub : 1); |
| 126 | unsigned int min_size; |
| 127 | |
| 128 | obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[i]); |
| 129 | if (!obj) { |
| 130 | dev_err(dev->dev, "Failed to lookup GEM object\n"); |
| 131 | ret = -ENXIO; |
| 132 | goto err_gem_object_unreference; |
| 133 | } |
| 134 | |
| 135 | min_size = (height - 1) * mode_cmd->pitches[i] |
| 136 | + width * drm_format_plane_cpp(mode_cmd->pixel_format, i) |
| 137 | + mode_cmd->offsets[i]; |
| 138 | |
| 139 | if (obj->size < min_size) { |
| 140 | drm_gem_object_unreference_unlocked(obj); |
| 141 | ret = -EINVAL; |
| 142 | goto err_gem_object_unreference; |
| 143 | } |
| 144 | objs[i] = to_drm_gem_cma_obj(obj); |
| 145 | } |
| 146 | |
| 147 | fb_cma = drm_fb_cma_alloc(dev, mode_cmd, objs, i); |
| 148 | if (IS_ERR(fb_cma)) { |
| 149 | ret = PTR_ERR(fb_cma); |
| 150 | goto err_gem_object_unreference; |
| 151 | } |
| 152 | |
| 153 | return &fb_cma->fb; |
| 154 | |
| 155 | err_gem_object_unreference: |
| 156 | for (i--; i >= 0; i--) |
| 157 | drm_gem_object_unreference_unlocked(&objs[i]->base); |
| 158 | return ERR_PTR(ret); |
| 159 | } |
| 160 | EXPORT_SYMBOL_GPL(drm_fb_cma_create); |
| 161 | |
| 162 | /** |
| 163 | * drm_fb_cma_get_gem_obj() - Get CMA GEM object for framebuffer |
| 164 | * @fb: The framebuffer |
| 165 | * @plane: Which plane |
| 166 | * |
| 167 | * Return the CMA GEM object for given framebuffer. |
| 168 | * |
| 169 | * This function will usually be called from the CRTC callback functions. |
| 170 | */ |
| 171 | struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb, |
| 172 | unsigned int plane) |
| 173 | { |
| 174 | struct drm_fb_cma *fb_cma = to_fb_cma(fb); |
| 175 | |
| 176 | if (plane >= 4) |
| 177 | return NULL; |
| 178 | |
| 179 | return fb_cma->obj[plane]; |
| 180 | } |
| 181 | EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_obj); |
| 182 | |
Rob Clark | 6f64609 | 2012-12-10 10:46:43 -0600 | [diff] [blame] | 183 | #ifdef CONFIG_DEBUG_FS |
Lespiau, Damien | 2c9c52e | 2013-08-20 00:53:08 +0100 | [diff] [blame] | 184 | /* |
Rob Clark | 6f64609 | 2012-12-10 10:46:43 -0600 | [diff] [blame] | 185 | * drm_fb_cma_describe() - Helper to dump information about a single |
| 186 | * CMA framebuffer object |
| 187 | */ |
Lespiau, Damien | 2c9c52e | 2013-08-20 00:53:08 +0100 | [diff] [blame] | 188 | static void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m) |
Rob Clark | 6f64609 | 2012-12-10 10:46:43 -0600 | [diff] [blame] | 189 | { |
| 190 | struct drm_fb_cma *fb_cma = to_fb_cma(fb); |
| 191 | int i, n = drm_format_num_planes(fb->pixel_format); |
| 192 | |
| 193 | seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, |
| 194 | (char *)&fb->pixel_format); |
| 195 | |
| 196 | for (i = 0; i < n; i++) { |
| 197 | seq_printf(m, " %d: offset=%d pitch=%d, obj: ", |
| 198 | i, fb->offsets[i], fb->pitches[i]); |
| 199 | drm_gem_cma_describe(fb_cma->obj[i], m); |
| 200 | } |
| 201 | } |
Rob Clark | 6f64609 | 2012-12-10 10:46:43 -0600 | [diff] [blame] | 202 | |
| 203 | /** |
| 204 | * drm_fb_cma_debugfs_show() - Helper to list CMA framebuffer objects |
| 205 | * in debugfs. |
| 206 | */ |
| 207 | int drm_fb_cma_debugfs_show(struct seq_file *m, void *arg) |
| 208 | { |
| 209 | struct drm_info_node *node = (struct drm_info_node *) m->private; |
| 210 | struct drm_device *dev = node->minor->dev; |
| 211 | struct drm_framebuffer *fb; |
| 212 | int ret; |
| 213 | |
| 214 | ret = mutex_lock_interruptible(&dev->mode_config.mutex); |
| 215 | if (ret) |
| 216 | return ret; |
| 217 | |
| 218 | ret = mutex_lock_interruptible(&dev->struct_mutex); |
| 219 | if (ret) { |
| 220 | mutex_unlock(&dev->mode_config.mutex); |
| 221 | return ret; |
| 222 | } |
| 223 | |
| 224 | list_for_each_entry(fb, &dev->mode_config.fb_list, head) |
| 225 | drm_fb_cma_describe(fb, m); |
| 226 | |
| 227 | mutex_unlock(&dev->struct_mutex); |
| 228 | mutex_unlock(&dev->mode_config.mutex); |
| 229 | |
| 230 | return 0; |
| 231 | } |
| 232 | EXPORT_SYMBOL_GPL(drm_fb_cma_debugfs_show); |
| 233 | #endif |
| 234 | |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 235 | static struct fb_ops drm_fbdev_cma_ops = { |
| 236 | .owner = THIS_MODULE, |
| 237 | .fb_fillrect = sys_fillrect, |
| 238 | .fb_copyarea = sys_copyarea, |
| 239 | .fb_imageblit = sys_imageblit, |
| 240 | .fb_check_var = drm_fb_helper_check_var, |
| 241 | .fb_set_par = drm_fb_helper_set_par, |
| 242 | .fb_blank = drm_fb_helper_blank, |
| 243 | .fb_pan_display = drm_fb_helper_pan_display, |
| 244 | .fb_setcmap = drm_fb_helper_setcmap, |
| 245 | }; |
| 246 | |
| 247 | static int drm_fbdev_cma_create(struct drm_fb_helper *helper, |
| 248 | struct drm_fb_helper_surface_size *sizes) |
| 249 | { |
| 250 | struct drm_fbdev_cma *fbdev_cma = to_fbdev_cma(helper); |
| 251 | struct drm_mode_fb_cmd2 mode_cmd = { 0 }; |
| 252 | struct drm_device *dev = helper->dev; |
| 253 | struct drm_gem_cma_object *obj; |
| 254 | struct drm_framebuffer *fb; |
| 255 | unsigned int bytes_per_pixel; |
| 256 | unsigned long offset; |
| 257 | struct fb_info *fbi; |
| 258 | size_t size; |
| 259 | int ret; |
| 260 | |
Thierry Reding | e0d78d0 | 2012-10-20 10:32:46 +0000 | [diff] [blame] | 261 | DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d)\n", |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 262 | sizes->surface_width, sizes->surface_height, |
| 263 | sizes->surface_bpp); |
| 264 | |
| 265 | bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8); |
| 266 | |
| 267 | mode_cmd.width = sizes->surface_width; |
| 268 | mode_cmd.height = sizes->surface_height; |
| 269 | mode_cmd.pitches[0] = sizes->surface_width * bytes_per_pixel; |
| 270 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, |
| 271 | sizes->surface_depth); |
| 272 | |
| 273 | size = mode_cmd.pitches[0] * mode_cmd.height; |
| 274 | obj = drm_gem_cma_create(dev, size); |
Thierry Reding | 0281324 | 2012-10-20 10:32:47 +0000 | [diff] [blame] | 275 | if (IS_ERR(obj)) |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 276 | return -ENOMEM; |
| 277 | |
| 278 | fbi = framebuffer_alloc(0, dev->dev); |
| 279 | if (!fbi) { |
| 280 | dev_err(dev->dev, "Failed to allocate framebuffer info.\n"); |
| 281 | ret = -ENOMEM; |
| 282 | goto err_drm_gem_cma_free_object; |
| 283 | } |
| 284 | |
| 285 | fbdev_cma->fb = drm_fb_cma_alloc(dev, &mode_cmd, &obj, 1); |
| 286 | if (IS_ERR(fbdev_cma->fb)) { |
| 287 | dev_err(dev->dev, "Failed to allocate DRM framebuffer.\n"); |
| 288 | ret = PTR_ERR(fbdev_cma->fb); |
| 289 | goto err_framebuffer_release; |
| 290 | } |
| 291 | |
| 292 | fb = &fbdev_cma->fb->fb; |
| 293 | helper->fb = fb; |
| 294 | helper->fbdev = fbi; |
| 295 | |
| 296 | fbi->par = helper; |
| 297 | fbi->flags = FBINFO_FLAG_DEFAULT; |
| 298 | fbi->fbops = &drm_fbdev_cma_ops; |
| 299 | |
| 300 | ret = fb_alloc_cmap(&fbi->cmap, 256, 0); |
| 301 | if (ret) { |
| 302 | dev_err(dev->dev, "Failed to allocate color map.\n"); |
| 303 | goto err_drm_fb_cma_destroy; |
| 304 | } |
| 305 | |
| 306 | drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth); |
Rob Clark | 8d76612 | 2015-03-11 10:23:10 -0400 | [diff] [blame] | 307 | drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height); |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 308 | |
| 309 | offset = fbi->var.xoffset * bytes_per_pixel; |
| 310 | offset += fbi->var.yoffset * fb->pitches[0]; |
| 311 | |
| 312 | dev->mode_config.fb_base = (resource_size_t)obj->paddr; |
| 313 | fbi->screen_base = obj->vaddr + offset; |
| 314 | fbi->fix.smem_start = (unsigned long)(obj->paddr + offset); |
| 315 | fbi->screen_size = size; |
| 316 | fbi->fix.smem_len = size; |
| 317 | |
| 318 | return 0; |
| 319 | |
| 320 | err_drm_fb_cma_destroy: |
Daniel Vetter | 3620636 | 2012-12-10 20:42:17 +0100 | [diff] [blame] | 321 | drm_framebuffer_unregister_private(fb); |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 322 | drm_fb_cma_destroy(fb); |
| 323 | err_framebuffer_release: |
| 324 | framebuffer_release(fbi); |
| 325 | err_drm_gem_cma_free_object: |
| 326 | drm_gem_cma_free_object(&obj->base); |
| 327 | return ret; |
| 328 | } |
| 329 | |
Thierry Reding | 3a49387 | 2014-06-27 17:19:23 +0200 | [diff] [blame] | 330 | static const struct drm_fb_helper_funcs drm_fb_cma_helper_funcs = { |
Daniel Vetter | cd5428a | 2013-01-21 23:42:49 +0100 | [diff] [blame] | 331 | .fb_probe = drm_fbdev_cma_create, |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 332 | }; |
| 333 | |
| 334 | /** |
| 335 | * drm_fbdev_cma_init() - Allocate and initializes a drm_fbdev_cma struct |
| 336 | * @dev: DRM device |
| 337 | * @preferred_bpp: Preferred bits per pixel for the device |
| 338 | * @num_crtc: Number of CRTCs |
| 339 | * @max_conn_count: Maximum number of connectors |
| 340 | * |
| 341 | * Returns a newly allocated drm_fbdev_cma struct or a ERR_PTR. |
| 342 | */ |
| 343 | struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev, |
| 344 | unsigned int preferred_bpp, unsigned int num_crtc, |
| 345 | unsigned int max_conn_count) |
| 346 | { |
| 347 | struct drm_fbdev_cma *fbdev_cma; |
| 348 | struct drm_fb_helper *helper; |
| 349 | int ret; |
| 350 | |
| 351 | fbdev_cma = kzalloc(sizeof(*fbdev_cma), GFP_KERNEL); |
| 352 | if (!fbdev_cma) { |
| 353 | dev_err(dev->dev, "Failed to allocate drm fbdev.\n"); |
| 354 | return ERR_PTR(-ENOMEM); |
| 355 | } |
| 356 | |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 357 | helper = &fbdev_cma->fb_helper; |
| 358 | |
Thierry Reding | 10a2310 | 2014-06-27 17:19:24 +0200 | [diff] [blame] | 359 | drm_fb_helper_prepare(dev, helper, &drm_fb_cma_helper_funcs); |
| 360 | |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 361 | ret = drm_fb_helper_init(dev, helper, num_crtc, max_conn_count); |
| 362 | if (ret < 0) { |
| 363 | dev_err(dev->dev, "Failed to initialize drm fb helper.\n"); |
| 364 | goto err_free; |
| 365 | } |
| 366 | |
| 367 | ret = drm_fb_helper_single_add_all_connectors(helper); |
| 368 | if (ret < 0) { |
| 369 | dev_err(dev->dev, "Failed to add connectors.\n"); |
| 370 | goto err_drm_fb_helper_fini; |
| 371 | |
| 372 | } |
| 373 | |
Daniel Vetter | 76a39db | 2013-01-20 23:12:54 +0100 | [diff] [blame] | 374 | /* disable all the possible outputs/crtcs before entering KMS mode */ |
| 375 | drm_helper_disable_unused_functions(dev); |
| 376 | |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 377 | ret = drm_fb_helper_initial_config(helper, preferred_bpp); |
| 378 | if (ret < 0) { |
Masanari Iida | 8b513d0 | 2013-05-21 23:13:12 +0900 | [diff] [blame] | 379 | dev_err(dev->dev, "Failed to set initial hw configuration.\n"); |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 380 | goto err_drm_fb_helper_fini; |
| 381 | } |
| 382 | |
| 383 | return fbdev_cma; |
| 384 | |
| 385 | err_drm_fb_helper_fini: |
| 386 | drm_fb_helper_fini(helper); |
| 387 | err_free: |
| 388 | kfree(fbdev_cma); |
| 389 | |
| 390 | return ERR_PTR(ret); |
| 391 | } |
| 392 | EXPORT_SYMBOL_GPL(drm_fbdev_cma_init); |
| 393 | |
| 394 | /** |
| 395 | * drm_fbdev_cma_fini() - Free drm_fbdev_cma struct |
| 396 | * @fbdev_cma: The drm_fbdev_cma struct |
| 397 | */ |
| 398 | void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma) |
| 399 | { |
| 400 | if (fbdev_cma->fb_helper.fbdev) { |
| 401 | struct fb_info *info; |
| 402 | int ret; |
| 403 | |
| 404 | info = fbdev_cma->fb_helper.fbdev; |
| 405 | ret = unregister_framebuffer(info); |
| 406 | if (ret < 0) |
| 407 | DRM_DEBUG_KMS("failed unregister_framebuffer()\n"); |
| 408 | |
| 409 | if (info->cmap.len) |
| 410 | fb_dealloc_cmap(&info->cmap); |
| 411 | |
| 412 | framebuffer_release(info); |
| 413 | } |
| 414 | |
Daniel Vetter | 3620636 | 2012-12-10 20:42:17 +0100 | [diff] [blame] | 415 | if (fbdev_cma->fb) { |
| 416 | drm_framebuffer_unregister_private(&fbdev_cma->fb->fb); |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 417 | drm_fb_cma_destroy(&fbdev_cma->fb->fb); |
Daniel Vetter | 3620636 | 2012-12-10 20:42:17 +0100 | [diff] [blame] | 418 | } |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 419 | |
| 420 | drm_fb_helper_fini(&fbdev_cma->fb_helper); |
| 421 | kfree(fbdev_cma); |
| 422 | } |
| 423 | EXPORT_SYMBOL_GPL(drm_fbdev_cma_fini); |
| 424 | |
| 425 | /** |
| 426 | * drm_fbdev_cma_restore_mode() - Restores initial framebuffer mode |
| 427 | * @fbdev_cma: The drm_fbdev_cma struct, may be NULL |
| 428 | * |
| 429 | * This function is usually called from the DRM drivers lastclose callback. |
| 430 | */ |
| 431 | void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma) |
| 432 | { |
Rob Clark | 5ea1f75 | 2014-05-30 12:29:48 -0400 | [diff] [blame] | 433 | if (fbdev_cma) |
| 434 | drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev_cma->fb_helper); |
Lars-Peter Clausen | 2e3b3c4 | 2012-07-02 16:37:47 +0200 | [diff] [blame] | 435 | } |
| 436 | EXPORT_SYMBOL_GPL(drm_fbdev_cma_restore_mode); |
| 437 | |
| 438 | /** |
| 439 | * drm_fbdev_cma_hotplug_event() - Poll for hotpulug events |
| 440 | * @fbdev_cma: The drm_fbdev_cma struct, may be NULL |
| 441 | * |
| 442 | * This function is usually called from the DRM drivers output_poll_changed |
| 443 | * callback. |
| 444 | */ |
| 445 | void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma) |
| 446 | { |
| 447 | if (fbdev_cma) |
| 448 | drm_fb_helper_hotplug_event(&fbdev_cma->fb_helper); |
| 449 | } |
| 450 | EXPORT_SYMBOL_GPL(drm_fbdev_cma_hotplug_event); |