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" |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 36 | #include "exynos_drm_buf.h" |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 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 drm_framebuffer *fb; |
| 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 | |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 87 | static int exynos_drm_fbdev_update(struct drm_fb_helper *helper, |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 88 | struct drm_framebuffer *fb, |
| 89 | unsigned int fb_width, |
| 90 | unsigned int fb_height) |
| 91 | { |
| 92 | struct fb_info *fbi = helper->fbdev; |
| 93 | struct drm_device *dev = helper->dev; |
| 94 | struct exynos_drm_fbdev *exynos_fb = to_exynos_fbdev(helper); |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 95 | struct exynos_drm_buf_entry *entry; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 96 | unsigned int size = fb_width * fb_height * (fb->bits_per_pixel >> 3); |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 97 | unsigned long offset; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 98 | |
| 99 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 100 | |
| 101 | exynos_fb->fb = fb; |
| 102 | |
Ville Syrjälä | 01f2c77 | 2011-12-20 00:06:49 +0200 | [diff] [blame^] | 103 | drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 104 | drm_fb_helper_fill_var(fbi, helper, fb_width, fb_height); |
| 105 | |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 106 | entry = exynos_drm_fb_get_buf(fb); |
| 107 | if (!entry) { |
| 108 | DRM_LOG_KMS("entry is null.\n"); |
| 109 | return -EFAULT; |
| 110 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 111 | |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 112 | offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3); |
Ville Syrjälä | 01f2c77 | 2011-12-20 00:06:49 +0200 | [diff] [blame^] | 113 | offset += fbi->var.yoffset * fb->pitches[0]; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 114 | |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 115 | dev->mode_config.fb_base = entry->paddr; |
| 116 | fbi->screen_base = entry->vaddr + offset; |
| 117 | fbi->fix.smem_start = entry->paddr + offset; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 118 | fbi->screen_size = size; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 119 | fbi->fix.smem_len = size; |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 120 | |
| 121 | return 0; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | static int exynos_drm_fbdev_create(struct drm_fb_helper *helper, |
| 125 | struct drm_fb_helper_surface_size *sizes) |
| 126 | { |
| 127 | struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); |
| 128 | struct drm_device *dev = helper->dev; |
| 129 | struct fb_info *fbi; |
| 130 | struct drm_mode_fb_cmd mode_cmd = { 0 }; |
| 131 | struct platform_device *pdev = dev->platformdev; |
| 132 | int ret; |
| 133 | |
| 134 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 135 | |
| 136 | DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n", |
| 137 | sizes->surface_width, sizes->surface_height, |
| 138 | sizes->surface_bpp); |
| 139 | |
| 140 | mode_cmd.width = sizes->surface_width; |
| 141 | mode_cmd.height = sizes->surface_height; |
| 142 | mode_cmd.bpp = sizes->surface_bpp; |
| 143 | mode_cmd.depth = sizes->surface_depth; |
| 144 | |
| 145 | mutex_lock(&dev->struct_mutex); |
| 146 | |
| 147 | fbi = framebuffer_alloc(0, &pdev->dev); |
| 148 | if (!fbi) { |
| 149 | DRM_ERROR("failed to allocate fb info.\n"); |
| 150 | ret = -ENOMEM; |
| 151 | goto out; |
| 152 | } |
| 153 | |
| 154 | exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd); |
| 155 | if (IS_ERR_OR_NULL(exynos_fbdev->fb)) { |
| 156 | DRM_ERROR("failed to create drm framebuffer.\n"); |
| 157 | ret = PTR_ERR(exynos_fbdev->fb); |
| 158 | goto out; |
| 159 | } |
| 160 | |
| 161 | helper->fb = exynos_fbdev->fb; |
| 162 | helper->fbdev = fbi; |
| 163 | |
| 164 | fbi->par = helper; |
| 165 | fbi->flags = FBINFO_FLAG_DEFAULT; |
| 166 | fbi->fbops = &exynos_drm_fb_ops; |
| 167 | |
| 168 | ret = fb_alloc_cmap(&fbi->cmap, 256, 0); |
| 169 | if (ret) { |
| 170 | DRM_ERROR("failed to allocate cmap.\n"); |
| 171 | goto out; |
| 172 | } |
| 173 | |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 174 | ret = exynos_drm_fbdev_update(helper, helper->fb, sizes->fb_width, |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 175 | sizes->fb_height); |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 176 | if (ret < 0) |
| 177 | fb_dealloc_cmap(&fbi->cmap); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 178 | |
| 179 | /* |
| 180 | * if failed, all resources allocated above would be released by |
| 181 | * drm_mode_config_cleanup() when drm_load() had been called prior |
| 182 | * to any specific driver such as fimd or hdmi driver. |
| 183 | */ |
| 184 | out: |
| 185 | mutex_unlock(&dev->struct_mutex); |
| 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | static bool |
| 190 | exynos_drm_fbdev_is_samefb(struct drm_framebuffer *fb, |
| 191 | struct drm_fb_helper_surface_size *sizes) |
| 192 | { |
| 193 | if (fb->width != sizes->surface_width) |
| 194 | return false; |
| 195 | if (fb->height != sizes->surface_height) |
| 196 | return false; |
| 197 | if (fb->bits_per_pixel != sizes->surface_bpp) |
| 198 | return false; |
| 199 | if (fb->depth != sizes->surface_depth) |
| 200 | return false; |
| 201 | |
| 202 | return true; |
| 203 | } |
| 204 | |
| 205 | static int exynos_drm_fbdev_recreate(struct drm_fb_helper *helper, |
| 206 | struct drm_fb_helper_surface_size *sizes) |
| 207 | { |
| 208 | struct drm_device *dev = helper->dev; |
| 209 | struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); |
| 210 | struct drm_framebuffer *fb = exynos_fbdev->fb; |
| 211 | struct drm_mode_fb_cmd mode_cmd = { 0 }; |
| 212 | |
| 213 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 214 | |
| 215 | if (helper->fb != fb) { |
| 216 | DRM_ERROR("drm framebuffer is different\n"); |
| 217 | return -EINVAL; |
| 218 | } |
| 219 | |
| 220 | if (exynos_drm_fbdev_is_samefb(fb, sizes)) |
| 221 | return 0; |
| 222 | |
| 223 | mode_cmd.width = sizes->surface_width; |
| 224 | mode_cmd.height = sizes->surface_height; |
| 225 | mode_cmd.bpp = sizes->surface_bpp; |
| 226 | mode_cmd.depth = sizes->surface_depth; |
| 227 | |
| 228 | if (fb->funcs->destroy) |
| 229 | fb->funcs->destroy(fb); |
| 230 | |
| 231 | exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd); |
| 232 | if (IS_ERR(exynos_fbdev->fb)) { |
| 233 | DRM_ERROR("failed to allocate fb.\n"); |
| 234 | return PTR_ERR(exynos_fbdev->fb); |
| 235 | } |
| 236 | |
| 237 | helper->fb = exynos_fbdev->fb; |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 238 | return exynos_drm_fbdev_update(helper, helper->fb, sizes->fb_width, |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 239 | sizes->fb_height); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper, |
| 243 | struct drm_fb_helper_surface_size *sizes) |
| 244 | { |
| 245 | int ret = 0; |
| 246 | |
| 247 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 248 | |
| 249 | if (!helper->fb) { |
| 250 | ret = exynos_drm_fbdev_create(helper, sizes); |
| 251 | if (ret < 0) { |
| 252 | DRM_ERROR("failed to create fbdev.\n"); |
| 253 | return ret; |
| 254 | } |
| 255 | |
| 256 | /* |
| 257 | * fb_helper expects a value more than 1 if succeed |
| 258 | * because register_framebuffer() should be called. |
| 259 | */ |
| 260 | ret = 1; |
| 261 | } else { |
| 262 | ret = exynos_drm_fbdev_recreate(helper, sizes); |
| 263 | if (ret < 0) { |
| 264 | DRM_ERROR("failed to reconfigure fbdev\n"); |
| 265 | return ret; |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | return ret; |
| 270 | } |
| 271 | |
| 272 | static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { |
| 273 | .fb_probe = exynos_drm_fbdev_probe, |
| 274 | }; |
| 275 | |
| 276 | int exynos_drm_fbdev_init(struct drm_device *dev) |
| 277 | { |
| 278 | struct exynos_drm_fbdev *fbdev; |
| 279 | struct exynos_drm_private *private = dev->dev_private; |
| 280 | struct drm_fb_helper *helper; |
| 281 | unsigned int num_crtc; |
| 282 | int ret; |
| 283 | |
| 284 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 285 | |
| 286 | if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) |
| 287 | return 0; |
| 288 | |
| 289 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); |
| 290 | if (!fbdev) { |
| 291 | DRM_ERROR("failed to allocate drm fbdev.\n"); |
| 292 | return -ENOMEM; |
| 293 | } |
| 294 | |
| 295 | private->fb_helper = helper = &fbdev->drm_fb_helper; |
| 296 | helper->funcs = &exynos_drm_fb_helper_funcs; |
| 297 | |
| 298 | num_crtc = dev->mode_config.num_crtc; |
| 299 | |
| 300 | ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR); |
| 301 | if (ret < 0) { |
| 302 | DRM_ERROR("failed to initialize drm fb helper.\n"); |
| 303 | goto err_init; |
| 304 | } |
| 305 | |
| 306 | ret = drm_fb_helper_single_add_all_connectors(helper); |
| 307 | if (ret < 0) { |
| 308 | DRM_ERROR("failed to register drm_fb_helper_connector.\n"); |
| 309 | goto err_setup; |
| 310 | |
| 311 | } |
| 312 | |
| 313 | ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); |
| 314 | if (ret < 0) { |
| 315 | DRM_ERROR("failed to set up hw configuration.\n"); |
| 316 | goto err_setup; |
| 317 | } |
| 318 | |
| 319 | return 0; |
| 320 | |
| 321 | err_setup: |
| 322 | drm_fb_helper_fini(helper); |
| 323 | |
| 324 | err_init: |
| 325 | private->fb_helper = NULL; |
| 326 | kfree(fbdev); |
| 327 | |
| 328 | return ret; |
| 329 | } |
| 330 | |
| 331 | static void exynos_drm_fbdev_destroy(struct drm_device *dev, |
| 332 | struct drm_fb_helper *fb_helper) |
| 333 | { |
| 334 | struct drm_framebuffer *fb; |
| 335 | |
| 336 | /* release drm framebuffer and real buffer */ |
| 337 | if (fb_helper->fb && fb_helper->fb->funcs) { |
| 338 | fb = fb_helper->fb; |
| 339 | if (fb && fb->funcs->destroy) |
| 340 | fb->funcs->destroy(fb); |
| 341 | } |
| 342 | |
| 343 | /* release linux framebuffer */ |
| 344 | if (fb_helper->fbdev) { |
| 345 | struct fb_info *info; |
| 346 | int ret; |
| 347 | |
| 348 | info = fb_helper->fbdev; |
| 349 | ret = unregister_framebuffer(info); |
| 350 | if (ret < 0) |
| 351 | DRM_DEBUG_KMS("failed unregister_framebuffer()\n"); |
| 352 | |
| 353 | if (info->cmap.len) |
| 354 | fb_dealloc_cmap(&info->cmap); |
| 355 | |
| 356 | framebuffer_release(info); |
| 357 | } |
| 358 | |
| 359 | drm_fb_helper_fini(fb_helper); |
| 360 | } |
| 361 | |
| 362 | void exynos_drm_fbdev_fini(struct drm_device *dev) |
| 363 | { |
| 364 | struct exynos_drm_private *private = dev->dev_private; |
| 365 | struct exynos_drm_fbdev *fbdev; |
| 366 | |
| 367 | if (!private || !private->fb_helper) |
| 368 | return; |
| 369 | |
| 370 | fbdev = to_exynos_fbdev(private->fb_helper); |
| 371 | |
| 372 | exynos_drm_fbdev_destroy(dev, private->fb_helper); |
| 373 | kfree(fbdev); |
| 374 | private->fb_helper = NULL; |
| 375 | } |
| 376 | |
| 377 | void exynos_drm_fbdev_restore_mode(struct drm_device *dev) |
| 378 | { |
| 379 | struct exynos_drm_private *private = dev->dev_private; |
| 380 | |
| 381 | if (!private || !private->fb_helper) |
| 382 | return; |
| 383 | |
| 384 | drm_fb_helper_restore_fbdev_mode(private->fb_helper); |
| 385 | } |
| 386 | |
| 387 | int exynos_drm_fbdev_reinit(struct drm_device *dev) |
| 388 | { |
| 389 | struct exynos_drm_private *private = dev->dev_private; |
| 390 | struct drm_fb_helper *fb_helper; |
| 391 | int ret; |
| 392 | |
| 393 | if (!private) |
| 394 | return -EINVAL; |
| 395 | |
Inki Dae | f6b9825 | 2011-10-14 13:29:50 +0900 | [diff] [blame] | 396 | /* |
| 397 | * if all sub drivers were unloaded then num_connector is 0 |
| 398 | * so at this time, the framebuffers also should be destroyed. |
| 399 | */ |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 400 | if (!dev->mode_config.num_connector) { |
| 401 | exynos_drm_fbdev_fini(dev); |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | fb_helper = private->fb_helper; |
| 406 | |
| 407 | if (fb_helper) { |
| 408 | drm_fb_helper_fini(fb_helper); |
| 409 | |
| 410 | ret = drm_fb_helper_init(dev, fb_helper, |
| 411 | dev->mode_config.num_crtc, MAX_CONNECTOR); |
| 412 | if (ret < 0) { |
| 413 | DRM_ERROR("failed to initialize drm fb helper\n"); |
| 414 | return ret; |
| 415 | } |
| 416 | |
| 417 | ret = drm_fb_helper_single_add_all_connectors(fb_helper); |
| 418 | if (ret < 0) { |
| 419 | DRM_ERROR("failed to add fb helper to connectors\n"); |
| 420 | goto err; |
| 421 | } |
| 422 | |
| 423 | ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP); |
| 424 | if (ret < 0) { |
| 425 | DRM_ERROR("failed to set up hw configuration.\n"); |
| 426 | goto err; |
| 427 | } |
| 428 | } else { |
| 429 | /* |
| 430 | * if drm_load() failed whem drm load() was called prior |
| 431 | * to specific drivers, fb_helper must be NULL and so |
| 432 | * this fuction should be called again to re-initialize and |
| 433 | * re-configure the fb helper. it means that this function |
| 434 | * has been called by the specific drivers. |
| 435 | */ |
Inki Dae | f6b9825 | 2011-10-14 13:29:50 +0900 | [diff] [blame] | 436 | ret = exynos_drm_fbdev_init(dev); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 437 | } |
| 438 | |
Inki Dae | 601b44e | 2011-10-14 13:29:49 +0900 | [diff] [blame] | 439 | return ret; |
| 440 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 441 | err: |
| 442 | /* |
| 443 | * if drm_load() failed when drm load() was called prior |
| 444 | * to specific drivers, the fb_helper must be NULL and so check it. |
| 445 | */ |
| 446 | if (fb_helper) |
| 447 | drm_fb_helper_fini(fb_helper); |
| 448 | |
| 449 | return ret; |
| 450 | } |
| 451 | |
| 452 | MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); |
| 453 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); |
| 454 | MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); |
| 455 | MODULE_DESCRIPTION("Samsung SoC DRM FBDEV Driver"); |
| 456 | MODULE_LICENSE("GPL"); |