drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c

   1 /*
   2  * Copyright © 2007 David Airlie
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *     David Airlie
  25  */
  26 #include <linux/module.h>
  27 #include <linux/slab.h>
  28 #include <linux/pm_runtime.h>
  29
  30 #include <drm/drmP.h>
  31 #include <drm/drm_crtc.h>
  32 #include <drm/drm_crtc_helper.h>
  33 #include <drm/amdgpu_drm.h>
  34 #include "amdgpu.h"
  35 #include "cikd.h"
  36
  37 #include <drm/drm_fb_helper.h>
  38
  39 #include <linux/vga_switcheroo.h>
  40
  41 /* object hierarchy -
  42    this contains a helper + a amdgpu fb
  43    the helper contains a pointer to amdgpu framebuffer baseclass.
  44 */
  45 struct amdgpu_fbdev {
  46         struct drm_fb_helper helper;
  47         struct amdgpu_framebuffer rfb;
  48         struct amdgpu_device *adev;
  49 };
  50
  51 static int
  52 amdgpufb_open(struct fb_info *info, int user)
  53 {
  54         struct amdgpu_fbdev *rfbdev = info->par;
  55         struct amdgpu_device *adev = rfbdev->adev;
  56         int ret = pm_runtime_get_sync(adev->ddev->dev);
  57         if (ret < 0 && ret != -EACCES) {
  58                 pm_runtime_mark_last_busy(adev->ddev->dev);
  59                 pm_runtime_put_autosuspend(adev->ddev->dev);
  60                 return ret;
  61         }
  62         return 0;
  63 }
  64
  65 static int
  66 amdgpufb_release(struct fb_info *info, int user)
  67 {
  68         struct amdgpu_fbdev *rfbdev = info->par;
  69         struct amdgpu_device *adev = rfbdev->adev;
  70
  71         pm_runtime_mark_last_busy(adev->ddev->dev);
  72         pm_runtime_put_autosuspend(adev->ddev->dev);
  73         return 0;
  74 }
  75
  76 static struct fb_ops amdgpufb_ops = {
  77         .owner = THIS_MODULE,
  78         DRM_FB_HELPER_DEFAULT_OPS,
  79         .fb_open = amdgpufb_open,
  80         .fb_release = amdgpufb_release,
  81         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  82         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  83         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  84 };
  85
  86
  87 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int cpp, bool tiled)
  88 {
  89         int aligned = width;
  90         int pitch_mask = 0;
  91
  92         switch (cpp) {
  93         case 1:
  94                 pitch_mask = 255;
  95                 break;
  96         case 2:
  97                 pitch_mask = 127;
  98                 break;
  99         case 3:
 100         case 4:
 101                 pitch_mask = 63;
 102                 break;
 103         }
 104
 105         aligned += pitch_mask;
 106         aligned &= ~pitch_mask;
 107         return aligned * cpp;
 108 }
 109
 110 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
 111 {
 112         struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
 113         int ret;
 114
 115         ret = amdgpu_bo_reserve(abo, true);
 116         if (likely(ret == 0)) {
 117                 amdgpu_bo_kunmap(abo);
 118                 amdgpu_bo_unpin(abo);
 119                 amdgpu_bo_unreserve(abo);
 120         }
 121         drm_gem_object_unreference_unlocked(gobj);
 122 }
 123
 124 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 125                                          struct drm_mode_fb_cmd2 *mode_cmd,
 126                                          struct drm_gem_object **gobj_p)
 127 {
 128         struct amdgpu_device *adev = rfbdev->adev;
 129         struct drm_gem_object *gobj = NULL;
 130         struct amdgpu_bo *abo = NULL;
 131         bool fb_tiled = false; /* useful for testing */
 132         u32 tiling_flags = 0;
 133         int ret;
 134         int aligned_size, size;
 135         int height = mode_cmd->height;
 136         u32 cpp;
 137
 138         cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);
 139
 140         /* need to align pitch with crtc limits */
 141         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
 142                                                   fb_tiled);
 143
 144         height = ALIGN(mode_cmd->height, 8);
 145         size = mode_cmd->pitches[0] * height;
 146         aligned_size = ALIGN(size, PAGE_SIZE);
 147         ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 148                                        AMDGPU_GEM_DOMAIN_VRAM,
 149                                        AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 150                                        AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
 151                                        AMDGPU_GEM_CREATE_VRAM_CLEARED,
 152                                        true, &gobj);
 153         if (ret) {
 154                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
 155                 return -ENOMEM;
 156         }
 157         abo = gem_to_amdgpu_bo(gobj);
 158
 159         if (fb_tiled)
 160                 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
 161
 162         ret = amdgpu_bo_reserve(abo, false);
 163         if (unlikely(ret != 0))
 164                 goto out_unref;
 165
 166         if (tiling_flags) {
 167                 ret = amdgpu_bo_set_tiling_flags(abo,
 168                                                  tiling_flags);
 169                 if (ret)
 170                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 171         }
 172
 173
 174         ret = amdgpu_bo_pin(abo, AMDGPU_GEM_DOMAIN_VRAM, NULL);
 175         if (ret) {
 176                 amdgpu_bo_unreserve(abo);
 177                 goto out_unref;
 178         }
 179         ret = amdgpu_bo_kmap(abo, NULL);
 180         amdgpu_bo_unreserve(abo);
 181         if (ret) {
 182                 goto out_unref;
 183         }
 184
 185         *gobj_p = gobj;
 186         return 0;
 187 out_unref:
 188         amdgpufb_destroy_pinned_object(gobj);
 189         *gobj_p = NULL;
 190         return ret;
 191 }
 192
 193 static int amdgpufb_create(struct drm_fb_helper *helper,
 194                            struct drm_fb_helper_surface_size *sizes)
 195 {
 196         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 197         struct amdgpu_device *adev = rfbdev->adev;
 198         struct fb_info *info;
 199         struct drm_framebuffer *fb = NULL;
 200         struct drm_mode_fb_cmd2 mode_cmd;
 201         struct drm_gem_object *gobj = NULL;
 202         struct amdgpu_bo *abo = NULL;
 203         int ret;
 204         unsigned long tmp;
 205
 206         mode_cmd.width = sizes->surface_width;
 207         mode_cmd.height = sizes->surface_height;
 208
 209         if (sizes->surface_bpp == 24)
 210                 sizes->surface_bpp = 32;
 211
 212         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 213                                                           sizes->surface_depth);
 214
 215         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 216         if (ret) {
 217                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 218                 return ret;
 219         }
 220
 221         abo = gem_to_amdgpu_bo(gobj);
 222
 223         /* okay we have an object now allocate the framebuffer */
 224         info = drm_fb_helper_alloc_fbi(helper);
 225         if (IS_ERR(info)) {
 226                 ret = PTR_ERR(info);
 227                 goto out;
 228         }
 229
 230         info->par = rfbdev;
 231         info->skip_vt_switch = true;
 232
 233         ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 234         if (ret) {
 235                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 236                 goto out;
 237         }
 238
 239         fb = &rfbdev->rfb.base;
 240
 241         /* setup helper */
 242         rfbdev->helper.fb = fb;
 243
 244         strcpy(info->fix.id, "amdgpudrmfb");
 245
 246         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 247
 248         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 249         info->fbops = &amdgpufb_ops;
 250
 251         tmp = amdgpu_bo_gpu_offset(abo) - adev->mc.vram_start;
 252         info->fix.smem_start = adev->mc.aper_base + tmp;
 253         info->fix.smem_len = amdgpu_bo_size(abo);
 254         info->screen_base = abo->kptr;
 255         info->screen_size = amdgpu_bo_size(abo);
 256
 257         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 258
 259         /* setup aperture base/size for vesafb takeover */
 260         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 261         info->apertures->ranges[0].size = adev->mc.aper_size;
 262
 263         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 264
 265         if (info->screen_base == NULL) {
 266                 ret = -ENOSPC;
 267                 goto out;
 268         }
 269
 270         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 271         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->mc.aper_base);
 272         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(abo));
 273         DRM_INFO("fb depth is %d\n", fb->format->depth);
 274         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 275
 276         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 277         return 0;
 278
 279 out:
 280         if (abo) {
 281
 282         }
 283         if (fb && ret) {
 284                 drm_gem_object_unreference_unlocked(gobj);
 285                 drm_framebuffer_unregister_private(fb);
 286                 drm_framebuffer_cleanup(fb);
 287                 kfree(fb);
 288         }
 289         return ret;
 290 }
 291
 292 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
 293 {
 294         if (adev->mode_info.rfbdev)
 295                 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
 296 }
 297
 298 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 299 {
 300         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 301
 302         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 303
 304         if (rfb->obj) {
 305                 amdgpufb_destroy_pinned_object(rfb->obj);
 306                 rfb->obj = NULL;
 307         }
 308         drm_fb_helper_fini(&rfbdev->helper);
 309         drm_framebuffer_unregister_private(&rfb->base);
 310         drm_framebuffer_cleanup(&rfb->base);
 311
 312         return 0;
 313 }
 314
 315 /** Sets the color ramps on behalf of fbcon */
 316 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 317                                       u16 blue, int regno)
 318 {
 319         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 320
 321         amdgpu_crtc->lut_r[regno] = red >> 6;
 322         amdgpu_crtc->lut_g[regno] = green >> 6;
 323         amdgpu_crtc->lut_b[regno] = blue >> 6;
 324 }
 325
 326 /** Gets the color ramps on behalf of fbcon */
 327 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 328                                       u16 *blue, int regno)
 329 {
 330         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 331
 332         *red = amdgpu_crtc->lut_r[regno] << 6;
 333         *green = amdgpu_crtc->lut_g[regno] << 6;
 334         *blue = amdgpu_crtc->lut_b[regno] << 6;
 335 }
 336
 337 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 338         .gamma_set = amdgpu_crtc_fb_gamma_set,
 339         .gamma_get = amdgpu_crtc_fb_gamma_get,
 340         .fb_probe = amdgpufb_create,
 341 };
 342
 343 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 344 {
 345         struct amdgpu_fbdev *rfbdev;
 346         int bpp_sel = 32;
 347         int ret;
 348
 349         /* don't init fbdev on hw without DCE */
 350         if (!adev->mode_info.mode_config_initialized)
 351                 return 0;
 352
 353         /* don't init fbdev if there are no connectors */
 354         if (list_empty(&adev->ddev->mode_config.connector_list))
 355                 return 0;
 356
 357         /* select 8 bpp console on low vram cards */
 358         if (adev->mc.real_vram_size <= (32*1024*1024))
 359                 bpp_sel = 8;
 360
 361         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 362         if (!rfbdev)
 363                 return -ENOMEM;
 364
 365         rfbdev->adev = adev;
 366         adev->mode_info.rfbdev = rfbdev;
 367
 368         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 369                         &amdgpu_fb_helper_funcs);
 370
 371         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 372                                  AMDGPUFB_CONN_LIMIT);
 373         if (ret) {
 374                 kfree(rfbdev);
 375                 return ret;
 376         }
 377
 378         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 379
 380         /* disable all the possible outputs/crtcs before entering KMS mode */
 381         drm_helper_disable_unused_functions(adev->ddev);
 382
 383         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 384         return 0;
 385 }
 386
 387 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 388 {
 389         if (!adev->mode_info.rfbdev)
 390                 return;
 391
 392         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 393         kfree(adev->mode_info.rfbdev);
 394         adev->mode_info.rfbdev = NULL;
 395 }
 396
 397 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 398 {
 399         if (adev->mode_info.rfbdev)
 400                 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
 401                         state);
 402 }
 403
 404 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 405 {
 406         struct amdgpu_bo *robj;
 407         int size = 0;
 408
 409         if (!adev->mode_info.rfbdev)
 410                 return 0;
 411
 412         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
 413         size += amdgpu_bo_size(robj);
 414         return size;
 415 }
 416
 417 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 418 {
 419         if (!adev->mode_info.rfbdev)
 420                 return false;
 421         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
 422                 return true;
 423         return false;
 424 }
 425
 426 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
 427 {
 428         struct amdgpu_fbdev *afbdev;
 429         struct drm_fb_helper *fb_helper;
 430         int ret;
 431
 432         if (!adev)
 433                 return;
 434
 435         afbdev = adev->mode_info.rfbdev;
 436
 437         if (!afbdev)
 438                 return;
 439
 440         fb_helper = &afbdev->helper;
 441
 442         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 443         if (ret)
 444                 DRM_DEBUG("failed to restore crtc mode\n");
 445 }