Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame^] | 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 | |
| 37 | #define MAX_CONNECTOR 4 |
| 38 | #define PREFERRED_BPP 32 |
| 39 | |
| 40 | #define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\ |
| 41 | drm_fb_helper) |
| 42 | |
| 43 | struct exynos_drm_fbdev { |
| 44 | struct drm_fb_helper drm_fb_helper; |
| 45 | struct drm_framebuffer *fb; |
| 46 | }; |
| 47 | |
| 48 | static int exynos_drm_fbdev_set_par(struct fb_info *info) |
| 49 | { |
| 50 | struct fb_var_screeninfo *var = &info->var; |
| 51 | |
| 52 | switch (var->bits_per_pixel) { |
| 53 | case 32: |
| 54 | case 24: |
| 55 | case 18: |
| 56 | case 16: |
| 57 | case 12: |
| 58 | info->fix.visual = FB_VISUAL_TRUECOLOR; |
| 59 | break; |
| 60 | case 1: |
| 61 | info->fix.visual = FB_VISUAL_MONO01; |
| 62 | break; |
| 63 | default: |
| 64 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
| 65 | break; |
| 66 | } |
| 67 | |
| 68 | info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8; |
| 69 | |
| 70 | return drm_fb_helper_set_par(info); |
| 71 | } |
| 72 | |
| 73 | |
| 74 | static struct fb_ops exynos_drm_fb_ops = { |
| 75 | .owner = THIS_MODULE, |
| 76 | .fb_fillrect = cfb_fillrect, |
| 77 | .fb_copyarea = cfb_copyarea, |
| 78 | .fb_imageblit = cfb_imageblit, |
| 79 | .fb_check_var = drm_fb_helper_check_var, |
| 80 | .fb_set_par = exynos_drm_fbdev_set_par, |
| 81 | .fb_blank = drm_fb_helper_blank, |
| 82 | .fb_pan_display = drm_fb_helper_pan_display, |
| 83 | .fb_setcmap = drm_fb_helper_setcmap, |
| 84 | }; |
| 85 | |
| 86 | static void exynos_drm_fbdev_update(struct drm_fb_helper *helper, |
| 87 | struct drm_framebuffer *fb, |
| 88 | unsigned int fb_width, |
| 89 | unsigned int fb_height) |
| 90 | { |
| 91 | struct fb_info *fbi = helper->fbdev; |
| 92 | struct drm_device *dev = helper->dev; |
| 93 | struct exynos_drm_fbdev *exynos_fb = to_exynos_fbdev(helper); |
| 94 | struct exynos_drm_buffer_info buffer_info; |
| 95 | unsigned int size = fb_width * fb_height * (fb->bits_per_pixel >> 3); |
| 96 | |
| 97 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 98 | |
| 99 | exynos_fb->fb = fb; |
| 100 | |
| 101 | drm_fb_helper_fill_fix(fbi, fb->pitch, fb->depth); |
| 102 | drm_fb_helper_fill_var(fbi, helper, fb_width, fb_height); |
| 103 | |
| 104 | exynos_drm_fb_update_buf_off(fb, fbi->var.xoffset, fbi->var.yoffset, |
| 105 | &buffer_info); |
| 106 | |
| 107 | dev->mode_config.fb_base = buffer_info.base_addr; |
| 108 | |
| 109 | fbi->screen_base = buffer_info.vaddr; |
| 110 | fbi->screen_size = size; |
| 111 | fbi->fix.smem_start = buffer_info.paddr; |
| 112 | fbi->fix.smem_len = size; |
| 113 | } |
| 114 | |
| 115 | static int exynos_drm_fbdev_create(struct drm_fb_helper *helper, |
| 116 | struct drm_fb_helper_surface_size *sizes) |
| 117 | { |
| 118 | struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); |
| 119 | struct drm_device *dev = helper->dev; |
| 120 | struct fb_info *fbi; |
| 121 | struct drm_mode_fb_cmd mode_cmd = { 0 }; |
| 122 | struct platform_device *pdev = dev->platformdev; |
| 123 | int ret; |
| 124 | |
| 125 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 126 | |
| 127 | DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n", |
| 128 | sizes->surface_width, sizes->surface_height, |
| 129 | sizes->surface_bpp); |
| 130 | |
| 131 | mode_cmd.width = sizes->surface_width; |
| 132 | mode_cmd.height = sizes->surface_height; |
| 133 | mode_cmd.bpp = sizes->surface_bpp; |
| 134 | mode_cmd.depth = sizes->surface_depth; |
| 135 | |
| 136 | mutex_lock(&dev->struct_mutex); |
| 137 | |
| 138 | fbi = framebuffer_alloc(0, &pdev->dev); |
| 139 | if (!fbi) { |
| 140 | DRM_ERROR("failed to allocate fb info.\n"); |
| 141 | ret = -ENOMEM; |
| 142 | goto out; |
| 143 | } |
| 144 | |
| 145 | exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd); |
| 146 | if (IS_ERR_OR_NULL(exynos_fbdev->fb)) { |
| 147 | DRM_ERROR("failed to create drm framebuffer.\n"); |
| 148 | ret = PTR_ERR(exynos_fbdev->fb); |
| 149 | goto out; |
| 150 | } |
| 151 | |
| 152 | helper->fb = exynos_fbdev->fb; |
| 153 | helper->fbdev = fbi; |
| 154 | |
| 155 | fbi->par = helper; |
| 156 | fbi->flags = FBINFO_FLAG_DEFAULT; |
| 157 | fbi->fbops = &exynos_drm_fb_ops; |
| 158 | |
| 159 | ret = fb_alloc_cmap(&fbi->cmap, 256, 0); |
| 160 | if (ret) { |
| 161 | DRM_ERROR("failed to allocate cmap.\n"); |
| 162 | goto out; |
| 163 | } |
| 164 | |
| 165 | exynos_drm_fbdev_update(helper, helper->fb, sizes->fb_width, |
| 166 | sizes->fb_height); |
| 167 | |
| 168 | /* |
| 169 | * if failed, all resources allocated above would be released by |
| 170 | * drm_mode_config_cleanup() when drm_load() had been called prior |
| 171 | * to any specific driver such as fimd or hdmi driver. |
| 172 | */ |
| 173 | out: |
| 174 | mutex_unlock(&dev->struct_mutex); |
| 175 | return ret; |
| 176 | } |
| 177 | |
| 178 | static bool |
| 179 | exynos_drm_fbdev_is_samefb(struct drm_framebuffer *fb, |
| 180 | struct drm_fb_helper_surface_size *sizes) |
| 181 | { |
| 182 | if (fb->width != sizes->surface_width) |
| 183 | return false; |
| 184 | if (fb->height != sizes->surface_height) |
| 185 | return false; |
| 186 | if (fb->bits_per_pixel != sizes->surface_bpp) |
| 187 | return false; |
| 188 | if (fb->depth != sizes->surface_depth) |
| 189 | return false; |
| 190 | |
| 191 | return true; |
| 192 | } |
| 193 | |
| 194 | static int exynos_drm_fbdev_recreate(struct drm_fb_helper *helper, |
| 195 | struct drm_fb_helper_surface_size *sizes) |
| 196 | { |
| 197 | struct drm_device *dev = helper->dev; |
| 198 | struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); |
| 199 | struct drm_framebuffer *fb = exynos_fbdev->fb; |
| 200 | struct drm_mode_fb_cmd mode_cmd = { 0 }; |
| 201 | |
| 202 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 203 | |
| 204 | if (helper->fb != fb) { |
| 205 | DRM_ERROR("drm framebuffer is different\n"); |
| 206 | return -EINVAL; |
| 207 | } |
| 208 | |
| 209 | if (exynos_drm_fbdev_is_samefb(fb, sizes)) |
| 210 | return 0; |
| 211 | |
| 212 | mode_cmd.width = sizes->surface_width; |
| 213 | mode_cmd.height = sizes->surface_height; |
| 214 | mode_cmd.bpp = sizes->surface_bpp; |
| 215 | mode_cmd.depth = sizes->surface_depth; |
| 216 | |
| 217 | if (fb->funcs->destroy) |
| 218 | fb->funcs->destroy(fb); |
| 219 | |
| 220 | exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd); |
| 221 | if (IS_ERR(exynos_fbdev->fb)) { |
| 222 | DRM_ERROR("failed to allocate fb.\n"); |
| 223 | return PTR_ERR(exynos_fbdev->fb); |
| 224 | } |
| 225 | |
| 226 | helper->fb = exynos_fbdev->fb; |
| 227 | exynos_drm_fbdev_update(helper, helper->fb, sizes->fb_width, |
| 228 | sizes->fb_height); |
| 229 | |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper, |
| 234 | struct drm_fb_helper_surface_size *sizes) |
| 235 | { |
| 236 | int ret = 0; |
| 237 | |
| 238 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 239 | |
| 240 | if (!helper->fb) { |
| 241 | ret = exynos_drm_fbdev_create(helper, sizes); |
| 242 | if (ret < 0) { |
| 243 | DRM_ERROR("failed to create fbdev.\n"); |
| 244 | return ret; |
| 245 | } |
| 246 | |
| 247 | /* |
| 248 | * fb_helper expects a value more than 1 if succeed |
| 249 | * because register_framebuffer() should be called. |
| 250 | */ |
| 251 | ret = 1; |
| 252 | } else { |
| 253 | ret = exynos_drm_fbdev_recreate(helper, sizes); |
| 254 | if (ret < 0) { |
| 255 | DRM_ERROR("failed to reconfigure fbdev\n"); |
| 256 | return ret; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | return ret; |
| 261 | } |
| 262 | |
| 263 | static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { |
| 264 | .fb_probe = exynos_drm_fbdev_probe, |
| 265 | }; |
| 266 | |
| 267 | int exynos_drm_fbdev_init(struct drm_device *dev) |
| 268 | { |
| 269 | struct exynos_drm_fbdev *fbdev; |
| 270 | struct exynos_drm_private *private = dev->dev_private; |
| 271 | struct drm_fb_helper *helper; |
| 272 | unsigned int num_crtc; |
| 273 | int ret; |
| 274 | |
| 275 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 276 | |
| 277 | if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) |
| 278 | return 0; |
| 279 | |
| 280 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); |
| 281 | if (!fbdev) { |
| 282 | DRM_ERROR("failed to allocate drm fbdev.\n"); |
| 283 | return -ENOMEM; |
| 284 | } |
| 285 | |
| 286 | private->fb_helper = helper = &fbdev->drm_fb_helper; |
| 287 | helper->funcs = &exynos_drm_fb_helper_funcs; |
| 288 | |
| 289 | num_crtc = dev->mode_config.num_crtc; |
| 290 | |
| 291 | ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR); |
| 292 | if (ret < 0) { |
| 293 | DRM_ERROR("failed to initialize drm fb helper.\n"); |
| 294 | goto err_init; |
| 295 | } |
| 296 | |
| 297 | ret = drm_fb_helper_single_add_all_connectors(helper); |
| 298 | if (ret < 0) { |
| 299 | DRM_ERROR("failed to register drm_fb_helper_connector.\n"); |
| 300 | goto err_setup; |
| 301 | |
| 302 | } |
| 303 | |
| 304 | ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); |
| 305 | if (ret < 0) { |
| 306 | DRM_ERROR("failed to set up hw configuration.\n"); |
| 307 | goto err_setup; |
| 308 | } |
| 309 | |
| 310 | return 0; |
| 311 | |
| 312 | err_setup: |
| 313 | drm_fb_helper_fini(helper); |
| 314 | |
| 315 | err_init: |
| 316 | private->fb_helper = NULL; |
| 317 | kfree(fbdev); |
| 318 | |
| 319 | return ret; |
| 320 | } |
| 321 | |
| 322 | static void exynos_drm_fbdev_destroy(struct drm_device *dev, |
| 323 | struct drm_fb_helper *fb_helper) |
| 324 | { |
| 325 | struct drm_framebuffer *fb; |
| 326 | |
| 327 | /* release drm framebuffer and real buffer */ |
| 328 | if (fb_helper->fb && fb_helper->fb->funcs) { |
| 329 | fb = fb_helper->fb; |
| 330 | if (fb && fb->funcs->destroy) |
| 331 | fb->funcs->destroy(fb); |
| 332 | } |
| 333 | |
| 334 | /* release linux framebuffer */ |
| 335 | if (fb_helper->fbdev) { |
| 336 | struct fb_info *info; |
| 337 | int ret; |
| 338 | |
| 339 | info = fb_helper->fbdev; |
| 340 | ret = unregister_framebuffer(info); |
| 341 | if (ret < 0) |
| 342 | DRM_DEBUG_KMS("failed unregister_framebuffer()\n"); |
| 343 | |
| 344 | if (info->cmap.len) |
| 345 | fb_dealloc_cmap(&info->cmap); |
| 346 | |
| 347 | framebuffer_release(info); |
| 348 | } |
| 349 | |
| 350 | drm_fb_helper_fini(fb_helper); |
| 351 | } |
| 352 | |
| 353 | void exynos_drm_fbdev_fini(struct drm_device *dev) |
| 354 | { |
| 355 | struct exynos_drm_private *private = dev->dev_private; |
| 356 | struct exynos_drm_fbdev *fbdev; |
| 357 | |
| 358 | if (!private || !private->fb_helper) |
| 359 | return; |
| 360 | |
| 361 | fbdev = to_exynos_fbdev(private->fb_helper); |
| 362 | |
| 363 | exynos_drm_fbdev_destroy(dev, private->fb_helper); |
| 364 | kfree(fbdev); |
| 365 | private->fb_helper = NULL; |
| 366 | } |
| 367 | |
| 368 | void exynos_drm_fbdev_restore_mode(struct drm_device *dev) |
| 369 | { |
| 370 | struct exynos_drm_private *private = dev->dev_private; |
| 371 | |
| 372 | if (!private || !private->fb_helper) |
| 373 | return; |
| 374 | |
| 375 | drm_fb_helper_restore_fbdev_mode(private->fb_helper); |
| 376 | } |
| 377 | |
| 378 | int exynos_drm_fbdev_reinit(struct drm_device *dev) |
| 379 | { |
| 380 | struct exynos_drm_private *private = dev->dev_private; |
| 381 | struct drm_fb_helper *fb_helper; |
| 382 | int ret; |
| 383 | |
| 384 | if (!private) |
| 385 | return -EINVAL; |
| 386 | |
| 387 | if (!dev->mode_config.num_connector) { |
| 388 | exynos_drm_fbdev_fini(dev); |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | fb_helper = private->fb_helper; |
| 393 | |
| 394 | if (fb_helper) { |
| 395 | drm_fb_helper_fini(fb_helper); |
| 396 | |
| 397 | ret = drm_fb_helper_init(dev, fb_helper, |
| 398 | dev->mode_config.num_crtc, MAX_CONNECTOR); |
| 399 | if (ret < 0) { |
| 400 | DRM_ERROR("failed to initialize drm fb helper\n"); |
| 401 | return ret; |
| 402 | } |
| 403 | |
| 404 | ret = drm_fb_helper_single_add_all_connectors(fb_helper); |
| 405 | if (ret < 0) { |
| 406 | DRM_ERROR("failed to add fb helper to connectors\n"); |
| 407 | goto err; |
| 408 | } |
| 409 | |
| 410 | ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP); |
| 411 | if (ret < 0) { |
| 412 | DRM_ERROR("failed to set up hw configuration.\n"); |
| 413 | goto err; |
| 414 | } |
| 415 | } else { |
| 416 | /* |
| 417 | * if drm_load() failed whem drm load() was called prior |
| 418 | * to specific drivers, fb_helper must be NULL and so |
| 419 | * this fuction should be called again to re-initialize and |
| 420 | * re-configure the fb helper. it means that this function |
| 421 | * has been called by the specific drivers. |
| 422 | */ |
| 423 | return exynos_drm_fbdev_init(dev); |
| 424 | } |
| 425 | |
| 426 | err: |
| 427 | /* |
| 428 | * if drm_load() failed when drm load() was called prior |
| 429 | * to specific drivers, the fb_helper must be NULL and so check it. |
| 430 | */ |
| 431 | if (fb_helper) |
| 432 | drm_fb_helper_fini(fb_helper); |
| 433 | |
| 434 | return ret; |
| 435 | } |
| 436 | |
| 437 | MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); |
| 438 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); |
| 439 | MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); |
| 440 | MODULE_DESCRIPTION("Samsung SoC DRM FBDEV Driver"); |
| 441 | MODULE_LICENSE("GPL"); |