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 list_head fbdev_list;
  49         struct amdgpu_device *adev;
  50 };
  51
  52 static struct fb_ops amdgpufb_ops = {
  53         .owner = THIS_MODULE,
  54         .fb_check_var = drm_fb_helper_check_var,
  55         .fb_set_par = drm_fb_helper_set_par,
  56         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  57         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  58         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  59         .fb_pan_display = drm_fb_helper_pan_display,
  60         .fb_blank = drm_fb_helper_blank,
  61         .fb_setcmap = drm_fb_helper_setcmap,
  62         .fb_debug_enter = drm_fb_helper_debug_enter,
  63         .fb_debug_leave = drm_fb_helper_debug_leave,
  64 };
  65
  66
  67 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled)
  68 {
  69         int aligned = width;
  70         int pitch_mask = 0;
  71
  72         switch (bpp / 8) {
  73         case 1:
  74                 pitch_mask = 255;
  75                 break;
  76         case 2:
  77                 pitch_mask = 127;
  78                 break;
  79         case 3:
  80         case 4:
  81                 pitch_mask = 63;
  82                 break;
  83         }
  84
  85         aligned += pitch_mask;
  86         aligned &= ~pitch_mask;
  87         return aligned;
  88 }
  89
  90 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
  91 {
  92         struct amdgpu_bo *rbo = gem_to_amdgpu_bo(gobj);
  93         int ret;
  94
  95         ret = amdgpu_bo_reserve(rbo, false);
  96         if (likely(ret == 0)) {
  97                 amdgpu_bo_kunmap(rbo);
  98                 amdgpu_bo_unpin(rbo);
  99                 amdgpu_bo_unreserve(rbo);
 100         }
 101         drm_gem_object_unreference_unlocked(gobj);
 102 }
 103
 104 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 105                                          struct drm_mode_fb_cmd2 *mode_cmd,
 106                                          struct drm_gem_object **gobj_p)
 107 {
 108         struct amdgpu_device *adev = rfbdev->adev;
 109         struct drm_gem_object *gobj = NULL;
 110         struct amdgpu_bo *rbo = NULL;
 111         bool fb_tiled = false; /* useful for testing */
 112         u32 tiling_flags = 0;
 113         int ret;
 114         int aligned_size, size;
 115         int height = mode_cmd->height;
 116         u32 bpp, depth;
 117
 118         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 119
 120         /* need to align pitch with crtc limits */
 121         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp,
 122                                                   fb_tiled) * ((bpp + 1) / 8);
 123
 124         height = ALIGN(mode_cmd->height, 8);
 125         size = mode_cmd->pitches[0] * height;
 126         aligned_size = ALIGN(size, PAGE_SIZE);
 127         ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 128                                        AMDGPU_GEM_DOMAIN_VRAM,
 129                                        AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
 130                                        true, &gobj);
 131         if (ret) {
 132                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 133                        aligned_size);
 134                 return -ENOMEM;
 135         }
 136         rbo = gem_to_amdgpu_bo(gobj);
 137
 138         if (fb_tiled)
 139                 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
 140
 141         ret = amdgpu_bo_reserve(rbo, false);
 142         if (unlikely(ret != 0))
 143                 goto out_unref;
 144
 145         if (tiling_flags) {
 146                 ret = amdgpu_bo_set_tiling_flags(rbo,
 147                                                  tiling_flags);
 148                 if (ret)
 149                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 150         }
 151
 152
 153         ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL);
 154         if (ret) {
 155                 amdgpu_bo_unreserve(rbo);
 156                 goto out_unref;
 157         }
 158         ret = amdgpu_bo_kmap(rbo, NULL);
 159         amdgpu_bo_unreserve(rbo);
 160         if (ret) {
 161                 goto out_unref;
 162         }
 163
 164         *gobj_p = gobj;
 165         return 0;
 166 out_unref:
 167         amdgpufb_destroy_pinned_object(gobj);
 168         *gobj_p = NULL;
 169         return ret;
 170 }
 171
 172 static int amdgpufb_create(struct drm_fb_helper *helper,
 173                            struct drm_fb_helper_surface_size *sizes)
 174 {
 175         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 176         struct amdgpu_device *adev = rfbdev->adev;
 177         struct fb_info *info;
 178         struct drm_framebuffer *fb = NULL;
 179         struct drm_mode_fb_cmd2 mode_cmd;
 180         struct drm_gem_object *gobj = NULL;
 181         struct amdgpu_bo *rbo = NULL;
 182         int ret;
 183         unsigned long tmp;
 184
 185         mode_cmd.width = sizes->surface_width;
 186         mode_cmd.height = sizes->surface_height;
 187
 188         if (sizes->surface_bpp == 24)
 189                 sizes->surface_bpp = 32;
 190
 191         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 192                                                           sizes->surface_depth);
 193
 194         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 195         if (ret) {
 196                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 197                 return ret;
 198         }
 199
 200         rbo = gem_to_amdgpu_bo(gobj);
 201
 202         /* okay we have an object now allocate the framebuffer */
 203         info = drm_fb_helper_alloc_fbi(helper);
 204         if (IS_ERR(info)) {
 205                 ret = PTR_ERR(info);
 206                 goto out_unref;
 207         }
 208
 209         info->par = rfbdev;
 210         info->skip_vt_switch = true;
 211
 212         ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 213         if (ret) {
 214                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 215                 goto out_destroy_fbi;
 216         }
 217
 218         fb = &rfbdev->rfb.base;
 219
 220         /* setup helper */
 221         rfbdev->helper.fb = fb;
 222
 223         memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo));
 224
 225         strcpy(info->fix.id, "amdgpudrmfb");
 226
 227         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 228
 229         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 230         info->fbops = &amdgpufb_ops;
 231
 232         tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start;
 233         info->fix.smem_start = adev->mc.aper_base + tmp;
 234         info->fix.smem_len = amdgpu_bo_size(rbo);
 235         info->screen_base = rbo->kptr;
 236         info->screen_size = amdgpu_bo_size(rbo);
 237
 238         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 239
 240         /* setup aperture base/size for vesafb takeover */
 241         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 242         info->apertures->ranges[0].size = adev->mc.aper_size;
 243
 244         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 245
 246         if (info->screen_base == NULL) {
 247                 ret = -ENOSPC;
 248                 goto out_destroy_fbi;
 249         }
 250
 251         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 252         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->mc.aper_base);
 253         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo));
 254         DRM_INFO("fb depth is %d\n", fb->depth);
 255         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 256
 257         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 258         return 0;
 259
 260 out_destroy_fbi:
 261         drm_fb_helper_release_fbi(helper);
 262 out_unref:
 263         if (rbo) {
 264
 265         }
 266         if (fb && ret) {
 267                 drm_gem_object_unreference(gobj);
 268                 drm_framebuffer_unregister_private(fb);
 269                 drm_framebuffer_cleanup(fb);
 270                 kfree(fb);
 271         }
 272         return ret;
 273 }
 274
 275 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
 276 {
 277         if (adev->mode_info.rfbdev)
 278                 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
 279 }
 280
 281 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 282 {
 283         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 284
 285         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 286         drm_fb_helper_release_fbi(&rfbdev->helper);
 287
 288         if (rfb->obj) {
 289                 amdgpufb_destroy_pinned_object(rfb->obj);
 290                 rfb->obj = NULL;
 291         }
 292         drm_fb_helper_fini(&rfbdev->helper);
 293         drm_framebuffer_unregister_private(&rfb->base);
 294         drm_framebuffer_cleanup(&rfb->base);
 295
 296         return 0;
 297 }
 298
 299 /** Sets the color ramps on behalf of fbcon */
 300 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 301                                       u16 blue, int regno)
 302 {
 303         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 304
 305         amdgpu_crtc->lut_r[regno] = red >> 6;
 306         amdgpu_crtc->lut_g[regno] = green >> 6;
 307         amdgpu_crtc->lut_b[regno] = blue >> 6;
 308 }
 309
 310 /** Gets the color ramps on behalf of fbcon */
 311 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 312                                       u16 *blue, int regno)
 313 {
 314         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 315
 316         *red = amdgpu_crtc->lut_r[regno] << 6;
 317         *green = amdgpu_crtc->lut_g[regno] << 6;
 318         *blue = amdgpu_crtc->lut_b[regno] << 6;
 319 }
 320
 321 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 322         .gamma_set = amdgpu_crtc_fb_gamma_set,
 323         .gamma_get = amdgpu_crtc_fb_gamma_get,
 324         .fb_probe = amdgpufb_create,
 325 };
 326
 327 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 328 {
 329         struct amdgpu_fbdev *rfbdev;
 330         int bpp_sel = 32;
 331         int ret;
 332
 333         /* don't init fbdev on hw without DCE */
 334         if (!adev->mode_info.mode_config_initialized)
 335                 return 0;
 336
 337         /* select 8 bpp console on low vram cards */
 338         if (adev->mc.real_vram_size <= (32*1024*1024))
 339                 bpp_sel = 8;
 340
 341         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 342         if (!rfbdev)
 343                 return -ENOMEM;
 344
 345         rfbdev->adev = adev;
 346         adev->mode_info.rfbdev = rfbdev;
 347
 348         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 349                         &amdgpu_fb_helper_funcs);
 350
 351         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 352                                  adev->mode_info.num_crtc,
 353                                  AMDGPUFB_CONN_LIMIT);
 354         if (ret) {
 355                 kfree(rfbdev);
 356                 return ret;
 357         }
 358
 359         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 360
 361         /* disable all the possible outputs/crtcs before entering KMS mode */
 362         drm_helper_disable_unused_functions(adev->ddev);
 363
 364         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 365         return 0;
 366 }
 367
 368 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 369 {
 370         if (!adev->mode_info.rfbdev)
 371                 return;
 372
 373         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 374         kfree(adev->mode_info.rfbdev);
 375         adev->mode_info.rfbdev = NULL;
 376 }
 377
 378 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 379 {
 380         if (adev->mode_info.rfbdev)
 381                 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
 382                         state);
 383 }
 384
 385 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 386 {
 387         struct amdgpu_bo *robj;
 388         int size = 0;
 389
 390         if (!adev->mode_info.rfbdev)
 391                 return 0;
 392
 393         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
 394         size += amdgpu_bo_size(robj);
 395         return size;
 396 }
 397
 398 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 399 {
 400         if (!adev->mode_info.rfbdev)
 401                 return false;
 402         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
 403                 return true;
 404         return false;
 405 }
 406
 407 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
 408 {
 409         struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;
 410         struct drm_fb_helper *fb_helper;
 411         int ret;
 412
 413         if (!afbdev)
 414                 return;
 415
 416         fb_helper = &afbdev->helper;
 417
 418         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 419         if (ret)
 420                 DRM_DEBUG("failed to restore crtc mode\n");
 421 }