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 | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 36 | #include "exynos_drm_gem.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 { |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 45 | struct drm_fb_helper drm_fb_helper; |
| 46 | struct exynos_drm_gem_obj *exynos_gem_obj; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 47 | }; |
| 48 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 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, |
Sascha Hauer | 83b316f | 2012-02-01 11:38:37 +0100 | [diff] [blame^] | 55 | .fb_set_par = drm_fb_helper_set_par, |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 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 | |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 61 | static int exynos_drm_fbdev_update(struct drm_fb_helper *helper, |
Seung-Woo Kim | aa6b2b6 | 2011-11-04 13:44:38 +0900 | [diff] [blame] | 62 | struct drm_framebuffer *fb) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 63 | { |
| 64 | struct fb_info *fbi = helper->fbdev; |
| 65 | struct drm_device *dev = helper->dev; |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 66 | struct exynos_drm_gem_buf *buffer; |
Seung-Woo Kim | aa6b2b6 | 2011-11-04 13:44:38 +0900 | [diff] [blame] | 67 | unsigned int size = fb->width * fb->height * (fb->bits_per_pixel >> 3); |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 68 | unsigned long offset; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 69 | |
| 70 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 71 | |
Ville Syrjälä | 01f2c77 | 2011-12-20 00:06:49 +0200 | [diff] [blame] | 72 | drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth); |
Seung-Woo Kim | aa6b2b6 | 2011-11-04 13:44:38 +0900 | [diff] [blame] | 73 | drm_fb_helper_fill_var(fbi, helper, fb->width, fb->height); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 74 | |
Seung-Woo Kim | 229d353 | 2011-12-15 14:36:22 +0900 | [diff] [blame] | 75 | /* RGB formats use only one buffer */ |
| 76 | buffer = exynos_drm_fb_buffer(fb, 0); |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 77 | if (!buffer) { |
| 78 | DRM_LOG_KMS("buffer is null.\n"); |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 79 | return -EFAULT; |
| 80 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 81 | |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 82 | offset = fbi->var.xoffset * (fb->bits_per_pixel >> 3); |
Ville Syrjälä | 01f2c77 | 2011-12-20 00:06:49 +0200 | [diff] [blame] | 83 | offset += fbi->var.yoffset * fb->pitches[0]; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 84 | |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 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); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 88 | fbi->screen_size = size; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 89 | fbi->fix.smem_len = size; |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 90 | |
| 91 | return 0; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 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); |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 98 | struct exynos_drm_gem_obj *exynos_gem_obj; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 99 | struct drm_device *dev = helper->dev; |
| 100 | struct fb_info *fbi; |
Joonyoung Shim | a794d57 | 2011-12-08 15:05:19 +0900 | [diff] [blame] | 101 | struct drm_mode_fb_cmd2 mode_cmd = { 0 }; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 102 | struct platform_device *pdev = dev->platformdev; |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 103 | unsigned long size; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 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; |
Joonyoung Shim | a794d57 | 2011-12-08 15:05:19 +0900 | [diff] [blame] | 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); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 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 | |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 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); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 131 | goto out; |
| 132 | } |
| 133 | |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 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 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 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 | |
Seung-Woo Kim | aa6b2b6 | 2011-11-04 13:44:38 +0900 | [diff] [blame] | 156 | ret = exynos_drm_fbdev_update(helper, helper->fb); |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 157 | if (ret < 0) { |
Inki Dae | 19c8b83 | 2011-10-14 13:29:46 +0900 | [diff] [blame] | 158 | fb_dealloc_cmap(&fbi->cmap); |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 159 | goto out; |
| 160 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 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 bool |
| 173 | exynos_drm_fbdev_is_samefb(struct drm_framebuffer *fb, |
| 174 | struct drm_fb_helper_surface_size *sizes) |
| 175 | { |
| 176 | if (fb->width != sizes->surface_width) |
| 177 | return false; |
| 178 | if (fb->height != sizes->surface_height) |
| 179 | return false; |
| 180 | if (fb->bits_per_pixel != sizes->surface_bpp) |
| 181 | return false; |
| 182 | if (fb->depth != sizes->surface_depth) |
| 183 | return false; |
| 184 | |
| 185 | return true; |
| 186 | } |
| 187 | |
| 188 | static int exynos_drm_fbdev_recreate(struct drm_fb_helper *helper, |
| 189 | struct drm_fb_helper_surface_size *sizes) |
| 190 | { |
| 191 | struct drm_device *dev = helper->dev; |
| 192 | struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper); |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 193 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 194 | struct drm_framebuffer *fb = helper->fb; |
Joonyoung Shim | a794d57 | 2011-12-08 15:05:19 +0900 | [diff] [blame] | 195 | struct drm_mode_fb_cmd2 mode_cmd = { 0 }; |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 196 | unsigned long size; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 197 | |
| 198 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 199 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 200 | if (exynos_drm_fbdev_is_samefb(fb, sizes)) |
| 201 | return 0; |
| 202 | |
| 203 | mode_cmd.width = sizes->surface_width; |
| 204 | mode_cmd.height = sizes->surface_height; |
Joonyoung Shim | a794d57 | 2011-12-08 15:05:19 +0900 | [diff] [blame] | 205 | mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3); |
| 206 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, |
| 207 | sizes->surface_depth); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 208 | |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 209 | if (exynos_fbdev->exynos_gem_obj) |
| 210 | exynos_drm_gem_destroy(exynos_fbdev->exynos_gem_obj); |
| 211 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 212 | if (fb->funcs->destroy) |
| 213 | fb->funcs->destroy(fb); |
| 214 | |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 215 | size = mode_cmd.pitches[0] * mode_cmd.height; |
| 216 | exynos_gem_obj = exynos_drm_gem_create(dev, size); |
| 217 | if (IS_ERR(exynos_gem_obj)) |
| 218 | return PTR_ERR(exynos_gem_obj); |
| 219 | |
| 220 | exynos_fbdev->exynos_gem_obj = exynos_gem_obj; |
| 221 | |
| 222 | helper->fb = exynos_drm_framebuffer_init(dev, &mode_cmd, |
| 223 | &exynos_gem_obj->base); |
| 224 | if (IS_ERR_OR_NULL(helper->fb)) { |
| 225 | DRM_ERROR("failed to create drm framebuffer.\n"); |
| 226 | return PTR_ERR(helper->fb); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 227 | } |
| 228 | |
Seung-Woo Kim | aa6b2b6 | 2011-11-04 13:44:38 +0900 | [diff] [blame] | 229 | return exynos_drm_fbdev_update(helper, helper->fb); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper, |
| 233 | struct drm_fb_helper_surface_size *sizes) |
| 234 | { |
| 235 | int ret = 0; |
| 236 | |
| 237 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 238 | |
| 239 | if (!helper->fb) { |
| 240 | ret = exynos_drm_fbdev_create(helper, sizes); |
| 241 | if (ret < 0) { |
| 242 | DRM_ERROR("failed to create fbdev.\n"); |
| 243 | return ret; |
| 244 | } |
| 245 | |
| 246 | /* |
| 247 | * fb_helper expects a value more than 1 if succeed |
| 248 | * because register_framebuffer() should be called. |
| 249 | */ |
| 250 | ret = 1; |
| 251 | } else { |
| 252 | ret = exynos_drm_fbdev_recreate(helper, sizes); |
| 253 | if (ret < 0) { |
| 254 | DRM_ERROR("failed to reconfigure fbdev\n"); |
| 255 | return ret; |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | return ret; |
| 260 | } |
| 261 | |
| 262 | static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { |
| 263 | .fb_probe = exynos_drm_fbdev_probe, |
| 264 | }; |
| 265 | |
| 266 | int exynos_drm_fbdev_init(struct drm_device *dev) |
| 267 | { |
| 268 | struct exynos_drm_fbdev *fbdev; |
| 269 | struct exynos_drm_private *private = dev->dev_private; |
| 270 | struct drm_fb_helper *helper; |
| 271 | unsigned int num_crtc; |
| 272 | int ret; |
| 273 | |
| 274 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 275 | |
| 276 | if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) |
| 277 | return 0; |
| 278 | |
| 279 | fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); |
| 280 | if (!fbdev) { |
| 281 | DRM_ERROR("failed to allocate drm fbdev.\n"); |
| 282 | return -ENOMEM; |
| 283 | } |
| 284 | |
| 285 | private->fb_helper = helper = &fbdev->drm_fb_helper; |
| 286 | helper->funcs = &exynos_drm_fb_helper_funcs; |
| 287 | |
| 288 | num_crtc = dev->mode_config.num_crtc; |
| 289 | |
| 290 | ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR); |
| 291 | if (ret < 0) { |
| 292 | DRM_ERROR("failed to initialize drm fb helper.\n"); |
| 293 | goto err_init; |
| 294 | } |
| 295 | |
| 296 | ret = drm_fb_helper_single_add_all_connectors(helper); |
| 297 | if (ret < 0) { |
| 298 | DRM_ERROR("failed to register drm_fb_helper_connector.\n"); |
| 299 | goto err_setup; |
| 300 | |
| 301 | } |
| 302 | |
| 303 | ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP); |
| 304 | if (ret < 0) { |
| 305 | DRM_ERROR("failed to set up hw configuration.\n"); |
| 306 | goto err_setup; |
| 307 | } |
| 308 | |
| 309 | return 0; |
| 310 | |
| 311 | err_setup: |
| 312 | drm_fb_helper_fini(helper); |
| 313 | |
| 314 | err_init: |
| 315 | private->fb_helper = NULL; |
| 316 | kfree(fbdev); |
| 317 | |
| 318 | return ret; |
| 319 | } |
| 320 | |
| 321 | static void exynos_drm_fbdev_destroy(struct drm_device *dev, |
| 322 | struct drm_fb_helper *fb_helper) |
| 323 | { |
| 324 | struct drm_framebuffer *fb; |
| 325 | |
| 326 | /* release drm framebuffer and real buffer */ |
| 327 | if (fb_helper->fb && fb_helper->fb->funcs) { |
| 328 | fb = fb_helper->fb; |
| 329 | if (fb && fb->funcs->destroy) |
| 330 | fb->funcs->destroy(fb); |
| 331 | } |
| 332 | |
| 333 | /* release linux framebuffer */ |
| 334 | if (fb_helper->fbdev) { |
| 335 | struct fb_info *info; |
| 336 | int ret; |
| 337 | |
| 338 | info = fb_helper->fbdev; |
| 339 | ret = unregister_framebuffer(info); |
| 340 | if (ret < 0) |
| 341 | DRM_DEBUG_KMS("failed unregister_framebuffer()\n"); |
| 342 | |
| 343 | if (info->cmap.len) |
| 344 | fb_dealloc_cmap(&info->cmap); |
| 345 | |
| 346 | framebuffer_release(info); |
| 347 | } |
| 348 | |
| 349 | drm_fb_helper_fini(fb_helper); |
| 350 | } |
| 351 | |
| 352 | void exynos_drm_fbdev_fini(struct drm_device *dev) |
| 353 | { |
| 354 | struct exynos_drm_private *private = dev->dev_private; |
| 355 | struct exynos_drm_fbdev *fbdev; |
| 356 | |
| 357 | if (!private || !private->fb_helper) |
| 358 | return; |
| 359 | |
| 360 | fbdev = to_exynos_fbdev(private->fb_helper); |
| 361 | |
Joonyoung Shim | e1533c0 | 2011-12-13 14:46:57 +0900 | [diff] [blame] | 362 | if (fbdev->exynos_gem_obj) |
| 363 | exynos_drm_gem_destroy(fbdev->exynos_gem_obj); |
| 364 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 365 | exynos_drm_fbdev_destroy(dev, private->fb_helper); |
| 366 | kfree(fbdev); |
| 367 | private->fb_helper = NULL; |
| 368 | } |
| 369 | |
| 370 | void exynos_drm_fbdev_restore_mode(struct drm_device *dev) |
| 371 | { |
| 372 | struct exynos_drm_private *private = dev->dev_private; |
| 373 | |
| 374 | if (!private || !private->fb_helper) |
| 375 | return; |
| 376 | |
| 377 | drm_fb_helper_restore_fbdev_mode(private->fb_helper); |
| 378 | } |
| 379 | |
| 380 | int exynos_drm_fbdev_reinit(struct drm_device *dev) |
| 381 | { |
| 382 | struct exynos_drm_private *private = dev->dev_private; |
| 383 | struct drm_fb_helper *fb_helper; |
| 384 | int ret; |
| 385 | |
| 386 | if (!private) |
| 387 | return -EINVAL; |
| 388 | |
Inki Dae | f6b9825 | 2011-10-14 13:29:50 +0900 | [diff] [blame] | 389 | /* |
| 390 | * if all sub drivers were unloaded then num_connector is 0 |
| 391 | * so at this time, the framebuffers also should be destroyed. |
| 392 | */ |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 393 | if (!dev->mode_config.num_connector) { |
| 394 | exynos_drm_fbdev_fini(dev); |
| 395 | return 0; |
| 396 | } |
| 397 | |
| 398 | fb_helper = private->fb_helper; |
| 399 | |
| 400 | if (fb_helper) { |
Joonyoung Shim | 84b4699 | 2011-11-04 13:41:46 +0900 | [diff] [blame] | 401 | struct list_head temp_list; |
| 402 | |
| 403 | INIT_LIST_HEAD(&temp_list); |
| 404 | |
| 405 | /* |
| 406 | * fb_helper is reintialized but kernel fb is reused |
| 407 | * so kernel_fb_list need to be backuped and restored |
| 408 | */ |
| 409 | if (!list_empty(&fb_helper->kernel_fb_list)) |
| 410 | list_replace_init(&fb_helper->kernel_fb_list, |
| 411 | &temp_list); |
| 412 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 413 | drm_fb_helper_fini(fb_helper); |
| 414 | |
| 415 | ret = drm_fb_helper_init(dev, fb_helper, |
| 416 | dev->mode_config.num_crtc, MAX_CONNECTOR); |
| 417 | if (ret < 0) { |
| 418 | DRM_ERROR("failed to initialize drm fb helper\n"); |
| 419 | return ret; |
| 420 | } |
| 421 | |
Joonyoung Shim | 84b4699 | 2011-11-04 13:41:46 +0900 | [diff] [blame] | 422 | if (!list_empty(&temp_list)) |
| 423 | list_replace(&temp_list, &fb_helper->kernel_fb_list); |
| 424 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 425 | ret = drm_fb_helper_single_add_all_connectors(fb_helper); |
| 426 | if (ret < 0) { |
| 427 | DRM_ERROR("failed to add fb helper to connectors\n"); |
| 428 | goto err; |
| 429 | } |
| 430 | |
| 431 | ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP); |
| 432 | if (ret < 0) { |
| 433 | DRM_ERROR("failed to set up hw configuration.\n"); |
| 434 | goto err; |
| 435 | } |
| 436 | } else { |
| 437 | /* |
| 438 | * if drm_load() failed whem drm load() was called prior |
| 439 | * to specific drivers, fb_helper must be NULL and so |
| 440 | * this fuction should be called again to re-initialize and |
| 441 | * re-configure the fb helper. it means that this function |
| 442 | * has been called by the specific drivers. |
| 443 | */ |
Inki Dae | f6b9825 | 2011-10-14 13:29:50 +0900 | [diff] [blame] | 444 | ret = exynos_drm_fbdev_init(dev); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 445 | } |
| 446 | |
Inki Dae | 601b44e | 2011-10-14 13:29:49 +0900 | [diff] [blame] | 447 | return ret; |
| 448 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 449 | err: |
| 450 | /* |
| 451 | * if drm_load() failed when drm load() was called prior |
| 452 | * to specific drivers, the fb_helper must be NULL and so check it. |
| 453 | */ |
| 454 | if (fb_helper) |
| 455 | drm_fb_helper_fini(fb_helper); |
| 456 | |
| 457 | return ret; |
| 458 | } |
| 459 | |
| 460 | MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); |
| 461 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); |
| 462 | MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); |
| 463 | MODULE_DESCRIPTION("Samsung SoC DRM FBDEV Driver"); |
| 464 | MODULE_LICENSE("GPL"); |