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/fb.h>
  29 #include <linux/pm_runtime.h>
  30
  31 #include <drm/drmP.h>
  32 #include <drm/drm_crtc.h>
  33 #include <drm/drm_crtc_helper.h>
  34 #include <drm/amdgpu_drm.h>
  35 #include "amdgpu.h"
  36 #include "cikd.h"
  37
  38 #include <drm/drm_fb_helper.h>
  39
  40 #include <linux/vga_switcheroo.h>
  41
  42 /* object hierarchy -
  43    this contains a helper + a amdgpu fb
  44    the helper contains a pointer to amdgpu framebuffer baseclass.
  45 */
  46 struct amdgpu_fbdev {
  47         struct drm_fb_helper helper;
  48         struct amdgpu_framebuffer rfb;
  49         struct amdgpu_device *adev;
  50 };
  51
  52 static int
  53 amdgpufb_open(struct fb_info *info, int user)
  54 {
  55         struct amdgpu_fbdev *rfbdev = info->par;
  56         struct amdgpu_device *adev = rfbdev->adev;
  57         int ret = pm_runtime_get_sync(adev->ddev->dev);
  58         if (ret < 0 && ret != -EACCES) {
  59                 pm_runtime_mark_last_busy(adev->ddev->dev);
  60                 pm_runtime_put_autosuspend(adev->ddev->dev);
  61                 return ret;
  62         }
  63         return 0;
  64 }
  65
  66 static int
  67 amdgpufb_release(struct fb_info *info, int user)
  68 {
  69         struct amdgpu_fbdev *rfbdev = info->par;
  70         struct amdgpu_device *adev = rfbdev->adev;
  71
  72         pm_runtime_mark_last_busy(adev->ddev->dev);
  73         pm_runtime_put_autosuspend(adev->ddev->dev);
  74         return 0;
  75 }
  76
  77 static struct fb_ops amdgpufb_ops = {
  78         .owner = THIS_MODULE,
  79         .fb_open = amdgpufb_open,
  80         .fb_release = amdgpufb_release,
  81         .fb_check_var = drm_fb_helper_check_var,
  82         .fb_set_par = drm_fb_helper_set_par,
  83         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  84         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  85         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  86         .fb_pan_display = drm_fb_helper_pan_display,
  87         .fb_blank = drm_fb_helper_blank,
  88         .fb_setcmap = drm_fb_helper_setcmap,
  89         .fb_debug_enter = drm_fb_helper_debug_enter,
  90         .fb_debug_leave = drm_fb_helper_debug_leave,
  91 };
  92
  93
  94 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled)
  95 {
  96         int aligned = width;
  97         int pitch_mask = 0;
  98
  99         switch (bpp / 8) {
 100         case 1:
 101                 pitch_mask = 255;
 102                 break;
 103         case 2:
 104                 pitch_mask = 127;
 105                 break;
 106         case 3:
 107         case 4:
 108                 pitch_mask = 63;
 109                 break;
 110         }
 111
 112         aligned += pitch_mask;
 113         aligned &= ~pitch_mask;
 114         return aligned;
 115 }
 116
 117 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
 118 {
 119         struct amdgpu_bo *rbo = gem_to_amdgpu_bo(gobj);
 120         int ret;
 121
 122         ret = amdgpu_bo_reserve(rbo, false);
 123         if (likely(ret == 0)) {
 124                 amdgpu_bo_kunmap(rbo);
 125                 amdgpu_bo_unpin(rbo);
 126                 amdgpu_bo_unreserve(rbo);
 127         }
 128         drm_gem_object_unreference_unlocked(gobj);
 129 }
 130
 131 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 132                                          struct drm_mode_fb_cmd2 *mode_cmd,
 133                                          struct drm_gem_object **gobj_p)
 134 {
 135         struct amdgpu_device *adev = rfbdev->adev;
 136         struct drm_gem_object *gobj = NULL;
 137         struct amdgpu_bo *rbo = NULL;
 138         bool fb_tiled = false; /* useful for testing */
 139         u32 tiling_flags = 0;
 140         int ret;
 141         int aligned_size, size;
 142         int height = mode_cmd->height;
 143         u32 bpp, depth;
 144
 145         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 146
 147         /* need to align pitch with crtc limits */
 148         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp,
 149                                                   fb_tiled) * ((bpp + 1) / 8);
 150
 151         height = ALIGN(mode_cmd->height, 8);
 152         size = mode_cmd->pitches[0] * height;
 153         aligned_size = ALIGN(size, PAGE_SIZE);
 154         ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 155                                        AMDGPU_GEM_DOMAIN_VRAM,
 156                                        AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
 157                                        true, &gobj);
 158         if (ret) {
 159                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 160                        aligned_size);
 161                 return -ENOMEM;
 162         }
 163         rbo = gem_to_amdgpu_bo(gobj);
 164
 165         if (fb_tiled)
 166                 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
 167
 168         ret = amdgpu_bo_reserve(rbo, false);
 169         if (unlikely(ret != 0))
 170                 goto out_unref;
 171
 172         if (tiling_flags) {
 173                 ret = amdgpu_bo_set_tiling_flags(rbo,
 174                                                  tiling_flags);
 175                 if (ret)
 176                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 177         }
 178
 179
 180         ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL);
 181         if (ret) {
 182                 amdgpu_bo_unreserve(rbo);
 183                 goto out_unref;
 184         }
 185         ret = amdgpu_bo_kmap(rbo, NULL);
 186         amdgpu_bo_unreserve(rbo);
 187         if (ret) {
 188                 goto out_unref;
 189         }
 190
 191         *gobj_p = gobj;
 192         return 0;
 193 out_unref:
 194         amdgpufb_destroy_pinned_object(gobj);
 195         *gobj_p = NULL;
 196         return ret;
 197 }
 198
 199 static int amdgpufb_create(struct drm_fb_helper *helper,
 200                            struct drm_fb_helper_surface_size *sizes)
 201 {
 202         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 203         struct amdgpu_device *adev = rfbdev->adev;
 204         struct fb_info *info;
 205         struct drm_framebuffer *fb = NULL;
 206         struct drm_mode_fb_cmd2 mode_cmd;
 207         struct drm_gem_object *gobj = NULL;
 208         struct amdgpu_bo *rbo = NULL;
 209         int ret;
 210         unsigned long tmp;
 211
 212         mode_cmd.width = sizes->surface_width;
 213         mode_cmd.height = sizes->surface_height;
 214
 215         if (sizes->surface_bpp == 24)
 216                 sizes->surface_bpp = 32;
 217
 218         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 219                                                           sizes->surface_depth);
 220
 221         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 222         if (ret) {
 223                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 224                 return ret;
 225         }
 226
 227         rbo = gem_to_amdgpu_bo(gobj);
 228
 229         /* okay we have an object now allocate the framebuffer */
 230         info = drm_fb_helper_alloc_fbi(helper);
 231         if (IS_ERR(info)) {
 232                 ret = PTR_ERR(info);
 233                 goto out_unref;
 234         }
 235
 236         info->par = rfbdev;
 237         info->skip_vt_switch = true;
 238
 239         ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 240         if (ret) {
 241                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 242                 goto out_destroy_fbi;
 243         }
 244
 245         fb = &rfbdev->rfb.base;
 246
 247         /* setup helper */
 248         rfbdev->helper.fb = fb;
 249
 250         memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo));
 251
 252         strcpy(info->fix.id, "amdgpudrmfb");
 253
 254         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 255
 256         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 257         info->fbops = &amdgpufb_ops;
 258
 259         tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start;
 260         info->fix.smem_start = adev->mc.aper_base + tmp;
 261         info->fix.smem_len = amdgpu_bo_size(rbo);
 262         info->screen_base = rbo->kptr;
 263         info->screen_size = amdgpu_bo_size(rbo);
 264
 265         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 266
 267         /* setup aperture base/size for vesafb takeover */
 268         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 269         info->apertures->ranges[0].size = adev->mc.aper_size;
 270
 271         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 272
 273         if (info->screen_base == NULL) {
 274                 ret = -ENOSPC;
 275                 goto out_destroy_fbi;
 276         }
 277
 278         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 279         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->mc.aper_base);
 280         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo));
 281         DRM_INFO("fb depth is %d\n", fb->depth);
 282         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 283
 284         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 285         return 0;
 286
 287 out_destroy_fbi:
 288         drm_fb_helper_release_fbi(helper);
 289 out_unref:
 290         if (rbo) {
 291
 292         }
 293         if (fb && ret) {
 294                 drm_gem_object_unreference_unlocked(gobj);
 295                 drm_framebuffer_unregister_private(fb);
 296                 drm_framebuffer_cleanup(fb);
 297                 kfree(fb);
 298         }
 299         return ret;
 300 }
 301
 302 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
 303 {
 304         if (adev->mode_info.rfbdev)
 305                 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
 306 }
 307
 308 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 309 {
 310         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 311
 312         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 313         drm_fb_helper_release_fbi(&rfbdev->helper);
 314
 315         if (rfb->obj) {
 316                 amdgpufb_destroy_pinned_object(rfb->obj);
 317                 rfb->obj = NULL;
 318         }
 319         drm_fb_helper_fini(&rfbdev->helper);
 320         drm_framebuffer_unregister_private(&rfb->base);
 321         drm_framebuffer_cleanup(&rfb->base);
 322
 323         return 0;
 324 }
 325
 326 /** Sets the color ramps on behalf of fbcon */
 327 static void amdgpu_crtc_fb_gamma_set(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         amdgpu_crtc->lut_r[regno] = red >> 6;
 333         amdgpu_crtc->lut_g[regno] = green >> 6;
 334         amdgpu_crtc->lut_b[regno] = blue >> 6;
 335 }
 336
 337 /** Gets the color ramps on behalf of fbcon */
 338 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 339                                       u16 *blue, int regno)
 340 {
 341         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 342
 343         *red = amdgpu_crtc->lut_r[regno] << 6;
 344         *green = amdgpu_crtc->lut_g[regno] << 6;
 345         *blue = amdgpu_crtc->lut_b[regno] << 6;
 346 }
 347
 348 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 349         .gamma_set = amdgpu_crtc_fb_gamma_set,
 350         .gamma_get = amdgpu_crtc_fb_gamma_get,
 351         .fb_probe = amdgpufb_create,
 352 };
 353
 354 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 355 {
 356         struct amdgpu_fbdev *rfbdev;
 357         int bpp_sel = 32;
 358         int ret;
 359
 360         /* don't init fbdev on hw without DCE */
 361         if (!adev->mode_info.mode_config_initialized)
 362                 return 0;
 363
 364         /* don't init fbdev if there are no connectors */
 365         if (list_empty(&adev->ddev->mode_config.connector_list))
 366                 return 0;
 367
 368         /* select 8 bpp console on low vram cards */
 369         if (adev->mc.real_vram_size <= (32*1024*1024))
 370                 bpp_sel = 8;
 371
 372         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 373         if (!rfbdev)
 374                 return -ENOMEM;
 375
 376         rfbdev->adev = adev;
 377         adev->mode_info.rfbdev = rfbdev;
 378
 379         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 380                         &amdgpu_fb_helper_funcs);
 381
 382         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 383                                  adev->mode_info.num_crtc,
 384                                  AMDGPUFB_CONN_LIMIT);
 385         if (ret) {
 386                 kfree(rfbdev);
 387                 return ret;
 388         }
 389
 390         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 391
 392         /* disable all the possible outputs/crtcs before entering KMS mode */
 393         drm_helper_disable_unused_functions(adev->ddev);
 394
 395         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 396         return 0;
 397 }
 398
 399 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 400 {
 401         if (!adev->mode_info.rfbdev)
 402                 return;
 403
 404         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 405         kfree(adev->mode_info.rfbdev);
 406         adev->mode_info.rfbdev = NULL;
 407 }
 408
 409 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 410 {
 411         if (adev->mode_info.rfbdev)
 412                 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
 413                         state);
 414 }
 415
 416 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 417 {
 418         struct amdgpu_bo *robj;
 419         int size = 0;
 420
 421         if (!adev->mode_info.rfbdev)
 422                 return 0;
 423
 424         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
 425         size += amdgpu_bo_size(robj);
 426         return size;
 427 }
 428
 429 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 430 {
 431         if (!adev->mode_info.rfbdev)
 432                 return false;
 433         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
 434                 return true;
 435         return false;
 436 }
 437
 438 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
 439 {
 440         struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;
 441         struct drm_fb_helper *fb_helper;
 442         int ret;
 443
 444         if (!afbdev)
 445                 return;
 446
 447         fb_helper = &afbdev->helper;
 448
 449         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 450         if (ret)
 451                 DRM_DEBUG("failed to restore crtc mode\n");
 452 }