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
  29 #include <drm/drmP.h>
  30 #include <drm/drm_crtc.h>
  31 #include <drm/drm_crtc_helper.h>
  32 #include <drm/amdgpu_drm.h>
  33 #include "amdgpu.h"
  34 #include "cikd.h"
  35
  36 #include <drm/drm_fb_helper.h>
  37
  38 #include <linux/vga_switcheroo.h>
  39
  40 /* object hierarchy -
  41    this contains a helper + a amdgpu fb
  42    the helper contains a pointer to amdgpu framebuffer baseclass.
  43 */
  44 struct amdgpu_fbdev {
  45         struct drm_fb_helper helper;
  46         struct amdgpu_framebuffer rfb;
  47         struct amdgpu_device *adev;
  48 };
  49
  50 static struct fb_ops amdgpufb_ops = {
  51         .owner = THIS_MODULE,
  52         .fb_check_var = drm_fb_helper_check_var,
  53         .fb_set_par = drm_fb_helper_set_par,
  54         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  55         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  56         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  57         .fb_pan_display = drm_fb_helper_pan_display,
  58         .fb_blank = drm_fb_helper_blank,
  59         .fb_setcmap = drm_fb_helper_setcmap,
  60         .fb_debug_enter = drm_fb_helper_debug_enter,
  61         .fb_debug_leave = drm_fb_helper_debug_leave,
  62 };
  63
  64
  65 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled)
  66 {
  67         int aligned = width;
  68         int pitch_mask = 0;
  69
  70         switch (bpp / 8) {
  71         case 1:
  72                 pitch_mask = 255;
  73                 break;
  74         case 2:
  75                 pitch_mask = 127;
  76                 break;
  77         case 3:
  78         case 4:
  79                 pitch_mask = 63;
  80                 break;
  81         }
  82
  83         aligned += pitch_mask;
  84         aligned &= ~pitch_mask;
  85         return aligned;
  86 }
  87
  88 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
  89 {
  90         struct amdgpu_bo *rbo = gem_to_amdgpu_bo(gobj);
  91         int ret;
  92
  93         ret = amdgpu_bo_reserve(rbo, false);
  94         if (likely(ret == 0)) {
  95                 amdgpu_bo_kunmap(rbo);
  96                 amdgpu_bo_unpin(rbo);
  97                 amdgpu_bo_unreserve(rbo);
  98         }
  99         drm_gem_object_unreference_unlocked(gobj);
 100 }
 101
 102 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 103                                          struct drm_mode_fb_cmd2 *mode_cmd,
 104                                          struct drm_gem_object **gobj_p)
 105 {
 106         struct amdgpu_device *adev = rfbdev->adev;
 107         struct drm_gem_object *gobj = NULL;
 108         struct amdgpu_bo *rbo = NULL;
 109         bool fb_tiled = false; /* useful for testing */
 110         u32 tiling_flags = 0;
 111         int ret;
 112         int aligned_size, size;
 113         int height = mode_cmd->height;
 114         u32 bpp, depth;
 115
 116         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 117
 118         /* need to align pitch with crtc limits */
 119         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp,
 120                                                   fb_tiled) * ((bpp + 1) / 8);
 121
 122         height = ALIGN(mode_cmd->height, 8);
 123         size = mode_cmd->pitches[0] * height;
 124         aligned_size = ALIGN(size, PAGE_SIZE);
 125         ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 126                                        AMDGPU_GEM_DOMAIN_VRAM,
 127                                        AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
 128                                        true, &gobj);
 129         if (ret) {
 130                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 131                        aligned_size);
 132                 return -ENOMEM;
 133         }
 134         rbo = gem_to_amdgpu_bo(gobj);
 135
 136         if (fb_tiled)
 137                 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
 138
 139         ret = amdgpu_bo_reserve(rbo, false);
 140         if (unlikely(ret != 0))
 141                 goto out_unref;
 142
 143         if (tiling_flags) {
 144                 ret = amdgpu_bo_set_tiling_flags(rbo,
 145                                                  tiling_flags);
 146                 if (ret)
 147                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 148         }
 149
 150
 151         ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL);
 152         if (ret) {
 153                 amdgpu_bo_unreserve(rbo);
 154                 goto out_unref;
 155         }
 156         ret = amdgpu_bo_kmap(rbo, NULL);
 157         amdgpu_bo_unreserve(rbo);
 158         if (ret) {
 159                 goto out_unref;
 160         }
 161
 162         *gobj_p = gobj;
 163         return 0;
 164 out_unref:
 165         amdgpufb_destroy_pinned_object(gobj);
 166         *gobj_p = NULL;
 167         return ret;
 168 }
 169
 170 static int amdgpufb_create(struct drm_fb_helper *helper,
 171                            struct drm_fb_helper_surface_size *sizes)
 172 {
 173         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 174         struct amdgpu_device *adev = rfbdev->adev;
 175         struct fb_info *info;
 176         struct drm_framebuffer *fb = NULL;
 177         struct drm_mode_fb_cmd2 mode_cmd;
 178         struct drm_gem_object *gobj = NULL;
 179         struct amdgpu_bo *rbo = NULL;
 180         int ret;
 181         unsigned long tmp;
 182
 183         mode_cmd.width = sizes->surface_width;
 184         mode_cmd.height = sizes->surface_height;
 185
 186         if (sizes->surface_bpp == 24)
 187                 sizes->surface_bpp = 32;
 188
 189         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 190                                                           sizes->surface_depth);
 191
 192         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 193         if (ret) {
 194                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 195                 return ret;
 196         }
 197
 198         rbo = gem_to_amdgpu_bo(gobj);
 199
 200         /* okay we have an object now allocate the framebuffer */
 201         info = drm_fb_helper_alloc_fbi(helper);
 202         if (IS_ERR(info)) {
 203                 ret = PTR_ERR(info);
 204                 goto out_unref;
 205         }
 206
 207         info->par = rfbdev;
 208         info->skip_vt_switch = true;
 209
 210         ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 211         if (ret) {
 212                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 213                 goto out_destroy_fbi;
 214         }
 215
 216         fb = &rfbdev->rfb.base;
 217
 218         /* setup helper */
 219         rfbdev->helper.fb = fb;
 220
 221         memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo));
 222
 223         strcpy(info->fix.id, "amdgpudrmfb");
 224
 225         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 226
 227         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 228         info->fbops = &amdgpufb_ops;
 229
 230         tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start;
 231         info->fix.smem_start = adev->mc.aper_base + tmp;
 232         info->fix.smem_len = amdgpu_bo_size(rbo);
 233         info->screen_base = rbo->kptr;
 234         info->screen_size = amdgpu_bo_size(rbo);
 235
 236         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 237
 238         /* setup aperture base/size for vesafb takeover */
 239         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 240         info->apertures->ranges[0].size = adev->mc.aper_size;
 241
 242         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 243
 244         if (info->screen_base == NULL) {
 245                 ret = -ENOSPC;
 246                 goto out_destroy_fbi;
 247         }
 248
 249         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 250         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->mc.aper_base);
 251         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo));
 252         DRM_INFO("fb depth is %d\n", fb->depth);
 253         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 254
 255         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 256         return 0;
 257
 258 out_destroy_fbi:
 259         drm_fb_helper_release_fbi(helper);
 260 out_unref:
 261         if (rbo) {
 262
 263         }
 264         if (fb && ret) {
 265                 drm_gem_object_unreference_unlocked(gobj);
 266                 drm_framebuffer_unregister_private(fb);
 267                 drm_framebuffer_cleanup(fb);
 268                 kfree(fb);
 269         }
 270         return ret;
 271 }
 272
 273 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
 274 {
 275         if (adev->mode_info.rfbdev)
 276                 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
 277 }
 278
 279 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 280 {
 281         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 282
 283         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 284         drm_fb_helper_release_fbi(&rfbdev->helper);
 285
 286         if (rfb->obj) {
 287                 amdgpufb_destroy_pinned_object(rfb->obj);
 288                 rfb->obj = NULL;
 289         }
 290         drm_fb_helper_fini(&rfbdev->helper);
 291         drm_framebuffer_unregister_private(&rfb->base);
 292         drm_framebuffer_cleanup(&rfb->base);
 293
 294         return 0;
 295 }
 296
 297 /** Sets the color ramps on behalf of fbcon */
 298 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 299                                       u16 blue, int regno)
 300 {
 301         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 302
 303         amdgpu_crtc->lut_r[regno] = red >> 6;
 304         amdgpu_crtc->lut_g[regno] = green >> 6;
 305         amdgpu_crtc->lut_b[regno] = blue >> 6;
 306 }
 307
 308 /** Gets the color ramps on behalf of fbcon */
 309 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 310                                       u16 *blue, int regno)
 311 {
 312         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 313
 314         *red = amdgpu_crtc->lut_r[regno] << 6;
 315         *green = amdgpu_crtc->lut_g[regno] << 6;
 316         *blue = amdgpu_crtc->lut_b[regno] << 6;
 317 }
 318
 319 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 320         .gamma_set = amdgpu_crtc_fb_gamma_set,
 321         .gamma_get = amdgpu_crtc_fb_gamma_get,
 322         .fb_probe = amdgpufb_create,
 323 };
 324
 325 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 326 {
 327         struct amdgpu_fbdev *rfbdev;
 328         int bpp_sel = 32;
 329         int ret;
 330
 331         /* don't init fbdev on hw without DCE */
 332         if (!adev->mode_info.mode_config_initialized)
 333                 return 0;
 334
 335         /* don't init fbdev if there are no connectors */
 336         if (list_empty(&adev->ddev->mode_config.connector_list))
 337                 return 0;
 338
 339         /* select 8 bpp console on low vram cards */
 340         if (adev->mc.real_vram_size <= (32*1024*1024))
 341                 bpp_sel = 8;
 342
 343         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 344         if (!rfbdev)
 345                 return -ENOMEM;
 346
 347         rfbdev->adev = adev;
 348         adev->mode_info.rfbdev = rfbdev;
 349
 350         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 351                         &amdgpu_fb_helper_funcs);
 352
 353         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 354                                  adev->mode_info.num_crtc,
 355                                  AMDGPUFB_CONN_LIMIT);
 356         if (ret) {
 357                 kfree(rfbdev);
 358                 return ret;
 359         }
 360
 361         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 362
 363         /* disable all the possible outputs/crtcs before entering KMS mode */
 364         drm_helper_disable_unused_functions(adev->ddev);
 365
 366         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 367         return 0;
 368 }
 369
 370 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 371 {
 372         if (!adev->mode_info.rfbdev)
 373                 return;
 374
 375         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 376         kfree(adev->mode_info.rfbdev);
 377         adev->mode_info.rfbdev = NULL;
 378 }
 379
 380 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 381 {
 382         if (adev->mode_info.rfbdev)
 383                 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
 384                         state);
 385 }
 386
 387 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 388 {
 389         struct amdgpu_bo *robj;
 390         int size = 0;
 391
 392         if (!adev->mode_info.rfbdev)
 393                 return 0;
 394
 395         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
 396         size += amdgpu_bo_size(robj);
 397         return size;
 398 }
 399
 400 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 401 {
 402         if (!adev->mode_info.rfbdev)
 403                 return false;
 404         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
 405                 return true;
 406         return false;
 407 }
 408
 409 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
 410 {
 411         struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;
 412         struct drm_fb_helper *fb_helper;
 413         int ret;
 414
 415         if (!afbdev)
 416                 return;
 417
 418         fb_helper = &afbdev->helper;
 419
 420         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 421         if (ret)
 422                 DRM_DEBUG("failed to restore crtc mode\n");
 423 }