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
  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 struct fb_ops amdgpufb_ops = {
  52         .owner = THIS_MODULE,
  53         .fb_check_var = drm_fb_helper_check_var,
  54         .fb_set_par = drm_fb_helper_set_par,
  55         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  56         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  57         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  58         .fb_pan_display = drm_fb_helper_pan_display,
  59         .fb_blank = drm_fb_helper_blank,
  60         .fb_setcmap = drm_fb_helper_setcmap,
  61         .fb_debug_enter = drm_fb_helper_debug_enter,
  62         .fb_debug_leave = drm_fb_helper_debug_leave,
  63 };
  64
  65
  66 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled)
  67 {
  68         int aligned = width;
  69         int pitch_mask = 0;
  70
  71         switch (bpp / 8) {
  72         case 1:
  73                 pitch_mask = 255;
  74                 break;
  75         case 2:
  76                 pitch_mask = 127;
  77                 break;
  78         case 3:
  79         case 4:
  80                 pitch_mask = 63;
  81                 break;
  82         }
  83
  84         aligned += pitch_mask;
  85         aligned &= ~pitch_mask;
  86         return aligned;
  87 }
  88
  89 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
  90 {
  91         struct amdgpu_bo *rbo = gem_to_amdgpu_bo(gobj);
  92         int ret;
  93
  94         ret = amdgpu_bo_reserve(rbo, false);
  95         if (likely(ret == 0)) {
  96                 amdgpu_bo_kunmap(rbo);
  97                 amdgpu_bo_unpin(rbo);
  98                 amdgpu_bo_unreserve(rbo);
  99         }
 100         drm_gem_object_unreference_unlocked(gobj);
 101 }
 102
 103 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 104                                          struct drm_mode_fb_cmd2 *mode_cmd,
 105                                          struct drm_gem_object **gobj_p)
 106 {
 107         struct amdgpu_device *adev = rfbdev->adev;
 108         struct drm_gem_object *gobj = NULL;
 109         struct amdgpu_bo *rbo = NULL;
 110         bool fb_tiled = false; /* useful for testing */
 111         u32 tiling_flags = 0;
 112         int ret;
 113         int aligned_size, size;
 114         int height = mode_cmd->height;
 115         u32 bpp, depth;
 116
 117         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 118
 119         /* need to align pitch with crtc limits */
 120         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp,
 121                                                   fb_tiled) * ((bpp + 1) / 8);
 122
 123         height = ALIGN(mode_cmd->height, 8);
 124         size = mode_cmd->pitches[0] * height;
 125         aligned_size = ALIGN(size, PAGE_SIZE);
 126         ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 127                                        AMDGPU_GEM_DOMAIN_VRAM,
 128                                        AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
 129                                        true, &gobj);
 130         if (ret) {
 131                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 132                        aligned_size);
 133                 return -ENOMEM;
 134         }
 135         rbo = gem_to_amdgpu_bo(gobj);
 136
 137         if (fb_tiled)
 138                 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
 139
 140         ret = amdgpu_bo_reserve(rbo, false);
 141         if (unlikely(ret != 0))
 142                 goto out_unref;
 143
 144         if (tiling_flags) {
 145                 ret = amdgpu_bo_set_tiling_flags(rbo,
 146                                                  tiling_flags);
 147                 if (ret)
 148                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 149         }
 150
 151
 152         ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL);
 153         if (ret) {
 154                 amdgpu_bo_unreserve(rbo);
 155                 goto out_unref;
 156         }
 157         ret = amdgpu_bo_kmap(rbo, NULL);
 158         amdgpu_bo_unreserve(rbo);
 159         if (ret) {
 160                 goto out_unref;
 161         }
 162
 163         *gobj_p = gobj;
 164         return 0;
 165 out_unref:
 166         amdgpufb_destroy_pinned_object(gobj);
 167         *gobj_p = NULL;
 168         return ret;
 169 }
 170
 171 static int amdgpufb_create(struct drm_fb_helper *helper,
 172                            struct drm_fb_helper_surface_size *sizes)
 173 {
 174         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 175         struct amdgpu_device *adev = rfbdev->adev;
 176         struct fb_info *info;
 177         struct drm_framebuffer *fb = NULL;
 178         struct drm_mode_fb_cmd2 mode_cmd;
 179         struct drm_gem_object *gobj = NULL;
 180         struct amdgpu_bo *rbo = NULL;
 181         int ret;
 182         unsigned long tmp;
 183
 184         mode_cmd.width = sizes->surface_width;
 185         mode_cmd.height = sizes->surface_height;
 186
 187         if (sizes->surface_bpp == 24)
 188                 sizes->surface_bpp = 32;
 189
 190         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 191                                                           sizes->surface_depth);
 192
 193         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 194         if (ret) {
 195                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 196                 return ret;
 197         }
 198
 199         rbo = gem_to_amdgpu_bo(gobj);
 200
 201         /* okay we have an object now allocate the framebuffer */
 202         info = drm_fb_helper_alloc_fbi(helper);
 203         if (IS_ERR(info)) {
 204                 ret = PTR_ERR(info);
 205                 goto out_unref;
 206         }
 207
 208         info->par = rfbdev;
 209         info->skip_vt_switch = true;
 210
 211         ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 212         if (ret) {
 213                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 214                 goto out_destroy_fbi;
 215         }
 216
 217         fb = &rfbdev->rfb.base;
 218
 219         /* setup helper */
 220         rfbdev->helper.fb = fb;
 221
 222         memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo));
 223
 224         strcpy(info->fix.id, "amdgpudrmfb");
 225
 226         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 227
 228         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 229         info->fbops = &amdgpufb_ops;
 230
 231         tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start;
 232         info->fix.smem_start = adev->mc.aper_base + tmp;
 233         info->fix.smem_len = amdgpu_bo_size(rbo);
 234         info->screen_base = rbo->kptr;
 235         info->screen_size = amdgpu_bo_size(rbo);
 236
 237         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 238
 239         /* setup aperture base/size for vesafb takeover */
 240         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 241         info->apertures->ranges[0].size = adev->mc.aper_size;
 242
 243         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 244
 245         if (info->screen_base == NULL) {
 246                 ret = -ENOSPC;
 247                 goto out_destroy_fbi;
 248         }
 249
 250         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 251         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->mc.aper_base);
 252         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo));
 253         DRM_INFO("fb depth is %d\n", fb->depth);
 254         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 255
 256         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 257         return 0;
 258
 259 out_destroy_fbi:
 260         drm_fb_helper_release_fbi(helper);
 261 out_unref:
 262         if (rbo) {
 263
 264         }
 265         if (fb && ret) {
 266                 drm_gem_object_unreference_unlocked(gobj);
 267                 drm_framebuffer_unregister_private(fb);
 268                 drm_framebuffer_cleanup(fb);
 269                 kfree(fb);
 270         }
 271         return ret;
 272 }
 273
 274 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
 275 {
 276         if (adev->mode_info.rfbdev)
 277                 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
 278 }
 279
 280 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 281 {
 282         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 283
 284         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 285         drm_fb_helper_release_fbi(&rfbdev->helper);
 286
 287         if (rfb->obj) {
 288                 amdgpufb_destroy_pinned_object(rfb->obj);
 289                 rfb->obj = NULL;
 290         }
 291         drm_fb_helper_fini(&rfbdev->helper);
 292         drm_framebuffer_unregister_private(&rfb->base);
 293         drm_framebuffer_cleanup(&rfb->base);
 294
 295         return 0;
 296 }
 297
 298 /** Sets the color ramps on behalf of fbcon */
 299 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 300                                       u16 blue, int regno)
 301 {
 302         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 303
 304         amdgpu_crtc->lut_r[regno] = red >> 6;
 305         amdgpu_crtc->lut_g[regno] = green >> 6;
 306         amdgpu_crtc->lut_b[regno] = blue >> 6;
 307 }
 308
 309 /** Gets the color ramps on behalf of fbcon */
 310 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 311                                       u16 *blue, int regno)
 312 {
 313         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 314
 315         *red = amdgpu_crtc->lut_r[regno] << 6;
 316         *green = amdgpu_crtc->lut_g[regno] << 6;
 317         *blue = amdgpu_crtc->lut_b[regno] << 6;
 318 }
 319
 320 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 321         .gamma_set = amdgpu_crtc_fb_gamma_set,
 322         .gamma_get = amdgpu_crtc_fb_gamma_get,
 323         .fb_probe = amdgpufb_create,
 324 };
 325
 326 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 327 {
 328         struct amdgpu_fbdev *rfbdev;
 329         int bpp_sel = 32;
 330         int ret;
 331
 332         /* don't init fbdev on hw without DCE */
 333         if (!adev->mode_info.mode_config_initialized)
 334                 return 0;
 335
 336         /* don't init fbdev if there are no connectors */
 337         if (list_empty(&adev->ddev->mode_config.connector_list))
 338                 return 0;
 339
 340         /* select 8 bpp console on low vram cards */
 341         if (adev->mc.real_vram_size <= (32*1024*1024))
 342                 bpp_sel = 8;
 343
 344         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 345         if (!rfbdev)
 346                 return -ENOMEM;
 347
 348         rfbdev->adev = adev;
 349         adev->mode_info.rfbdev = rfbdev;
 350
 351         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 352                         &amdgpu_fb_helper_funcs);
 353
 354         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 355                                  adev->mode_info.num_crtc,
 356                                  AMDGPUFB_CONN_LIMIT);
 357         if (ret) {
 358                 kfree(rfbdev);
 359                 return ret;
 360         }
 361
 362         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 363
 364         /* disable all the possible outputs/crtcs before entering KMS mode */
 365         drm_helper_disable_unused_functions(adev->ddev);
 366
 367         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 368         return 0;
 369 }
 370
 371 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 372 {
 373         if (!adev->mode_info.rfbdev)
 374                 return;
 375
 376         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 377         kfree(adev->mode_info.rfbdev);
 378         adev->mode_info.rfbdev = NULL;
 379 }
 380
 381 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 382 {
 383         if (adev->mode_info.rfbdev)
 384                 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
 385                         state);
 386 }
 387
 388 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 389 {
 390         struct amdgpu_bo *robj;
 391         int size = 0;
 392
 393         if (!adev->mode_info.rfbdev)
 394                 return 0;
 395
 396         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
 397         size += amdgpu_bo_size(robj);
 398         return size;
 399 }
 400
 401 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 402 {
 403         if (!adev->mode_info.rfbdev)
 404                 return false;
 405         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
 406                 return true;
 407         return false;
 408 }
 409
 410 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
 411 {
 412         struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;
 413         struct drm_fb_helper *fb_helper;
 414         int ret;
 415
 416         if (!afbdev)
 417                 return;
 418
 419         fb_helper = &afbdev->helper;
 420
 421         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 422         if (ret)
 423                 DRM_DEBUG("failed to restore crtc mode\n");
 424 }