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         .fb_open = amdgpufb_open,
  79         .fb_release = amdgpufb_release,
  80         .fb_check_var = drm_fb_helper_check_var,
  81         .fb_set_par = drm_fb_helper_set_par,
  82         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  83         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  84         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  85         .fb_pan_display = drm_fb_helper_pan_display,
  86         .fb_blank = drm_fb_helper_blank,
  87         .fb_setcmap = drm_fb_helper_setcmap,
  88         .fb_debug_enter = drm_fb_helper_debug_enter,
  89         .fb_debug_leave = drm_fb_helper_debug_leave,
  90 };
  91
  92
  93 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled)
  94 {
  95         int aligned = width;
  96         int pitch_mask = 0;
  97
  98         switch (bpp / 8) {
  99         case 1:
 100                 pitch_mask = 255;
 101                 break;
 102         case 2:
 103                 pitch_mask = 127;
 104                 break;
 105         case 3:
 106         case 4:
 107                 pitch_mask = 63;
 108                 break;
 109         }
 110
 111         aligned += pitch_mask;
 112         aligned &= ~pitch_mask;
 113         return aligned;
 114 }
 115
 116 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
 117 {
 118         struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
 119         int ret;
 120
 121         ret = amdgpu_bo_reserve(abo, false);
 122         if (likely(ret == 0)) {
 123                 amdgpu_bo_kunmap(abo);
 124                 amdgpu_bo_unpin(abo);
 125                 amdgpu_bo_unreserve(abo);
 126         }
 127         drm_gem_object_unreference_unlocked(gobj);
 128 }
 129
 130 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 131                                          struct drm_mode_fb_cmd2 *mode_cmd,
 132                                          struct drm_gem_object **gobj_p)
 133 {
 134         struct amdgpu_device *adev = rfbdev->adev;
 135         struct drm_gem_object *gobj = NULL;
 136         struct amdgpu_bo *abo = NULL;
 137         bool fb_tiled = false; /* useful for testing */
 138         u32 tiling_flags = 0;
 139         int ret;
 140         int aligned_size, size;
 141         int height = mode_cmd->height;
 142         u32 bpp, depth;
 143
 144         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 145
 146         /* need to align pitch with crtc limits */
 147         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp,
 148                                                   fb_tiled) * ((bpp + 1) / 8);
 149
 150         height = ALIGN(mode_cmd->height, 8);
 151         size = mode_cmd->pitches[0] * height;
 152         aligned_size = ALIGN(size, PAGE_SIZE);
 153         ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 154                                        AMDGPU_GEM_DOMAIN_VRAM,
 155                                        AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
 156                                        true, &gobj);
 157         if (ret) {
 158                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 159                        aligned_size);
 160                 return -ENOMEM;
 161         }
 162         abo = gem_to_amdgpu_bo(gobj);
 163
 164         if (fb_tiled)
 165                 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
 166
 167         ret = amdgpu_bo_reserve(abo, false);
 168         if (unlikely(ret != 0))
 169                 goto out_unref;
 170
 171         if (tiling_flags) {
 172                 ret = amdgpu_bo_set_tiling_flags(abo,
 173                                                  tiling_flags);
 174                 if (ret)
 175                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 176         }
 177
 178
 179         ret = amdgpu_bo_pin_restricted(abo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL);
 180         if (ret) {
 181                 amdgpu_bo_unreserve(abo);
 182                 goto out_unref;
 183         }
 184         ret = amdgpu_bo_kmap(abo, NULL);
 185         amdgpu_bo_unreserve(abo);
 186         if (ret) {
 187                 goto out_unref;
 188         }
 189
 190         *gobj_p = gobj;
 191         return 0;
 192 out_unref:
 193         amdgpufb_destroy_pinned_object(gobj);
 194         *gobj_p = NULL;
 195         return ret;
 196 }
 197
 198 static int amdgpufb_create(struct drm_fb_helper *helper,
 199                            struct drm_fb_helper_surface_size *sizes)
 200 {
 201         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 202         struct amdgpu_device *adev = rfbdev->adev;
 203         struct fb_info *info;
 204         struct drm_framebuffer *fb = NULL;
 205         struct drm_mode_fb_cmd2 mode_cmd;
 206         struct drm_gem_object *gobj = NULL;
 207         struct amdgpu_bo *abo = NULL;
 208         int ret;
 209         unsigned long tmp;
 210
 211         mode_cmd.width = sizes->surface_width;
 212         mode_cmd.height = sizes->surface_height;
 213
 214         if (sizes->surface_bpp == 24)
 215                 sizes->surface_bpp = 32;
 216
 217         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 218                                                           sizes->surface_depth);
 219
 220         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 221         if (ret) {
 222                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 223                 return ret;
 224         }
 225
 226         abo = gem_to_amdgpu_bo(gobj);
 227
 228         /* okay we have an object now allocate the framebuffer */
 229         info = drm_fb_helper_alloc_fbi(helper);
 230         if (IS_ERR(info)) {
 231                 ret = PTR_ERR(info);
 232                 goto out_unref;
 233         }
 234
 235         info->par = rfbdev;
 236         info->skip_vt_switch = true;
 237
 238         ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 239         if (ret) {
 240                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 241                 goto out_destroy_fbi;
 242         }
 243
 244         fb = &rfbdev->rfb.base;
 245
 246         /* setup helper */
 247         rfbdev->helper.fb = fb;
 248
 249         memset_io(abo->kptr, 0x0, amdgpu_bo_size(abo));
 250
 251         strcpy(info->fix.id, "amdgpudrmfb");
 252
 253         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 254
 255         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 256         info->fbops = &amdgpufb_ops;
 257
 258         tmp = amdgpu_bo_gpu_offset(abo) - adev->mc.vram_start;
 259         info->fix.smem_start = adev->mc.aper_base + tmp;
 260         info->fix.smem_len = amdgpu_bo_size(abo);
 261         info->screen_base = abo->kptr;
 262         info->screen_size = amdgpu_bo_size(abo);
 263
 264         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 265
 266         /* setup aperture base/size for vesafb takeover */
 267         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 268         info->apertures->ranges[0].size = adev->mc.aper_size;
 269
 270         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 271
 272         if (info->screen_base == NULL) {
 273                 ret = -ENOSPC;
 274                 goto out_destroy_fbi;
 275         }
 276
 277         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 278         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->mc.aper_base);
 279         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(abo));
 280         DRM_INFO("fb depth is %d\n", fb->depth);
 281         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 282
 283         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 284         return 0;
 285
 286 out_destroy_fbi:
 287         drm_fb_helper_release_fbi(helper);
 288 out_unref:
 289         if (abo) {
 290
 291         }
 292         if (fb && ret) {
 293                 drm_gem_object_unreference_unlocked(gobj);
 294                 drm_framebuffer_unregister_private(fb);
 295                 drm_framebuffer_cleanup(fb);
 296                 kfree(fb);
 297         }
 298         return ret;
 299 }
 300
 301 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
 302 {
 303         if (adev->mode_info.rfbdev)
 304                 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
 305 }
 306
 307 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 308 {
 309         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 310
 311         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 312         drm_fb_helper_release_fbi(&rfbdev->helper);
 313
 314         if (rfb->obj) {
 315                 amdgpufb_destroy_pinned_object(rfb->obj);
 316                 rfb->obj = NULL;
 317         }
 318         drm_fb_helper_fini(&rfbdev->helper);
 319         drm_framebuffer_unregister_private(&rfb->base);
 320         drm_framebuffer_cleanup(&rfb->base);
 321
 322         return 0;
 323 }
 324
 325 /** Sets the color ramps on behalf of fbcon */
 326 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 327                                       u16 blue, int regno)
 328 {
 329         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 330
 331         amdgpu_crtc->lut_r[regno] = red >> 6;
 332         amdgpu_crtc->lut_g[regno] = green >> 6;
 333         amdgpu_crtc->lut_b[regno] = blue >> 6;
 334 }
 335
 336 /** Gets the color ramps on behalf of fbcon */
 337 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 338                                       u16 *blue, int regno)
 339 {
 340         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 341
 342         *red = amdgpu_crtc->lut_r[regno] << 6;
 343         *green = amdgpu_crtc->lut_g[regno] << 6;
 344         *blue = amdgpu_crtc->lut_b[regno] << 6;
 345 }
 346
 347 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 348         .gamma_set = amdgpu_crtc_fb_gamma_set,
 349         .gamma_get = amdgpu_crtc_fb_gamma_get,
 350         .fb_probe = amdgpufb_create,
 351 };
 352
 353 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 354 {
 355         struct amdgpu_fbdev *rfbdev;
 356         int bpp_sel = 32;
 357         int ret;
 358
 359         /* don't init fbdev on hw without DCE */
 360         if (!adev->mode_info.mode_config_initialized)
 361                 return 0;
 362
 363         /* don't init fbdev if there are no connectors */
 364         if (list_empty(&adev->ddev->mode_config.connector_list))
 365                 return 0;
 366
 367         /* select 8 bpp console on low vram cards */
 368         if (adev->mc.real_vram_size <= (32*1024*1024))
 369                 bpp_sel = 8;
 370
 371         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 372         if (!rfbdev)
 373                 return -ENOMEM;
 374
 375         rfbdev->adev = adev;
 376         adev->mode_info.rfbdev = rfbdev;
 377
 378         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 379                         &amdgpu_fb_helper_funcs);
 380
 381         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 382                                  adev->mode_info.num_crtc,
 383                                  AMDGPUFB_CONN_LIMIT);
 384         if (ret) {
 385                 kfree(rfbdev);
 386                 return ret;
 387         }
 388
 389         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 390
 391         /* disable all the possible outputs/crtcs before entering KMS mode */
 392         drm_helper_disable_unused_functions(adev->ddev);
 393
 394         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 395         return 0;
 396 }
 397
 398 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 399 {
 400         if (!adev->mode_info.rfbdev)
 401                 return;
 402
 403         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 404         kfree(adev->mode_info.rfbdev);
 405         adev->mode_info.rfbdev = NULL;
 406 }
 407
 408 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 409 {
 410         if (adev->mode_info.rfbdev)
 411                 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
 412                         state);
 413 }
 414
 415 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 416 {
 417         struct amdgpu_bo *robj;
 418         int size = 0;
 419
 420         if (!adev->mode_info.rfbdev)
 421                 return 0;
 422
 423         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
 424         size += amdgpu_bo_size(robj);
 425         return size;
 426 }
 427
 428 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 429 {
 430         if (!adev->mode_info.rfbdev)
 431                 return false;
 432         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
 433                 return true;
 434         return false;
 435 }
 436
 437 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
 438 {
 439         struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;
 440         struct drm_fb_helper *fb_helper;
 441         int ret;
 442
 443         if (!afbdev)
 444                 return;
 445
 446         fb_helper = &afbdev->helper;
 447
 448         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 449         if (ret)
 450                 DRM_DEBUG("failed to restore crtc mode\n");
 451 }