drivers/gpu/drm/gma500/framebuffer.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /**************************************************************************
   3  * Copyright (c) 2007-2011, Intel Corporation.
   4  * All Rights Reserved.
   5  *
   6  **************************************************************************/
   7
   8 #include <linux/console.h>
   9 #include <linux/delay.h>
  10 #include <linux/errno.h>
  11 #include <linux/init.h>
  12 #include <linux/kernel.h>
  13 #include <linux/mm.h>
  14 #include <linux/module.h>
  15 #include <linux/pfn_t.h>
  16 #include <linux/slab.h>
  17 #include <linux/string.h>
  18 #include <linux/tty.h>
  19
  20 #include <drm/drm.h>
  21 #include <drm/drm_crtc.h>
  22 #include <drm/drm_fb_helper.h>
  23 #include <drm/drm_fourcc.h>
  24 #include <drm/drm_gem_framebuffer_helper.h>
  25
  26 #include "framebuffer.h"
  27 #include "gem.h"
  28 #include "gtt.h"
  29 #include "psb_drv.h"
  30 #include "psb_intel_drv.h"
  31 #include "psb_intel_reg.h"
  32
  33 static const struct drm_framebuffer_funcs psb_fb_funcs = {
  34         .destroy = drm_gem_fb_destroy,
  35         .create_handle = drm_gem_fb_create_handle,
  36 };
  37
  38 #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
  39
  40 static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
  41                            unsigned blue, unsigned transp,
  42                            struct fb_info *info)
  43 {
  44         struct drm_fb_helper *fb_helper = info->par;
  45         struct drm_framebuffer *fb = fb_helper->fb;
  46         uint32_t v;
  47
  48         if (!fb)
  49                 return -ENOMEM;
  50
  51         if (regno > 255)
  52                 return 1;
  53
  54         red = CMAP_TOHW(red, info->var.red.length);
  55         blue = CMAP_TOHW(blue, info->var.blue.length);
  56         green = CMAP_TOHW(green, info->var.green.length);
  57         transp = CMAP_TOHW(transp, info->var.transp.length);
  58
  59         v = (red << info->var.red.offset) |
  60             (green << info->var.green.offset) |
  61             (blue << info->var.blue.offset) |
  62             (transp << info->var.transp.offset);
  63
  64         if (regno < 16) {
  65                 switch (fb->format->cpp[0] * 8) {
  66                 case 16:
  67                         ((uint32_t *) info->pseudo_palette)[regno] = v;
  68                         break;
  69                 case 24:
  70                 case 32:
  71                         ((uint32_t *) info->pseudo_palette)[regno] = v;
  72                         break;
  73                 }
  74         }
  75
  76         return 0;
  77 }
  78
  79 static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
  80 {
  81         struct vm_area_struct *vma = vmf->vma;
  82         struct drm_framebuffer *fb = vma->vm_private_data;
  83         struct drm_device *dev = fb->dev;
  84         struct drm_psb_private *dev_priv = dev->dev_private;
  85         struct gtt_range *gtt = to_gtt_range(fb->obj[0]);
  86         int page_num;
  87         int i;
  88         unsigned long address;
  89         vm_fault_t ret = VM_FAULT_SIGBUS;
  90         unsigned long pfn;
  91         unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
  92                                   gtt->offset;
  93
  94         page_num = vma_pages(vma);
  95         address = vmf->address - (vmf->pgoff << PAGE_SHIFT);
  96
  97         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
  98
  99         for (i = 0; i < page_num; i++) {
 100                 pfn = (phys_addr >> PAGE_SHIFT);
 101
 102                 ret = vmf_insert_mixed(vma, address,
 103                                 __pfn_to_pfn_t(pfn, PFN_DEV));
 104                 if (unlikely(ret & VM_FAULT_ERROR))
 105                         break;
 106                 address += PAGE_SIZE;
 107                 phys_addr += PAGE_SIZE;
 108         }
 109         return ret;
 110 }
 111
 112 static void psbfb_vm_open(struct vm_area_struct *vma)
 113 {
 114 }
 115
 116 static void psbfb_vm_close(struct vm_area_struct *vma)
 117 {
 118 }
 119
 120 static const struct vm_operations_struct psbfb_vm_ops = {
 121         .fault  = psbfb_vm_fault,
 122         .open   = psbfb_vm_open,
 123         .close  = psbfb_vm_close
 124 };
 125
 126 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 127 {
 128         struct drm_fb_helper *fb_helper = info->par;
 129         struct drm_framebuffer *fb = fb_helper->fb;
 130
 131         if (vma->vm_pgoff != 0)
 132                 return -EINVAL;
 133         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 134                 return -EINVAL;
 135
 136         /*
 137          * If this is a GEM object then info->screen_base is the virtual
 138          * kernel remapping of the object. FIXME: Review if this is
 139          * suitable for our mmap work
 140          */
 141         vma->vm_ops = &psbfb_vm_ops;
 142         vma->vm_private_data = (void *)fb;
 143         vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
 144         return 0;
 145 }
 146
 147 static const struct fb_ops psbfb_ops = {
 148         .owner = THIS_MODULE,
 149         DRM_FB_HELPER_DEFAULT_OPS,
 150         .fb_setcolreg = psbfb_setcolreg,
 151         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 152         .fb_copyarea = psbfb_copyarea,
 153         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 154         .fb_mmap = psbfb_mmap,
 155         .fb_sync = psbfb_sync,
 156 };
 157
 158 static const struct fb_ops psbfb_unaccel_ops = {
 159         .owner = THIS_MODULE,
 160         DRM_FB_HELPER_DEFAULT_OPS,
 161         .fb_setcolreg = psbfb_setcolreg,
 162         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 163         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 164         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 165         .fb_mmap = psbfb_mmap,
 166 };
 167
 168 /**
 169  *      psb_framebuffer_init    -       initialize a framebuffer
 170  *      @dev: our DRM device
 171  *      @fb: framebuffer to set up
 172  *      @mode_cmd: mode description
 173  *      @gt: backing object
 174  *
 175  *      Configure and fill in the boilerplate for our frame buffer. Return
 176  *      0 on success or an error code if we fail.
 177  */
 178 static int psb_framebuffer_init(struct drm_device *dev,
 179                                         struct drm_framebuffer *fb,
 180                                         const struct drm_mode_fb_cmd2 *mode_cmd,
 181                                         struct drm_gem_object *obj)
 182 {
 183         const struct drm_format_info *info;
 184         int ret;
 185
 186         /*
 187          * Reject unknown formats, YUV formats, and formats with more than
 188          * 4 bytes per pixel.
 189          */
 190         info = drm_get_format_info(dev, mode_cmd);
 191         if (!info || !info->depth || info->cpp[0] > 4)
 192                 return -EINVAL;
 193
 194         if (mode_cmd->pitches[0] & 63)
 195                 return -EINVAL;
 196
 197         drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
 198         fb->obj[0] = obj;
 199         ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
 200         if (ret) {
 201                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 202                 return ret;
 203         }
 204         return 0;
 205 }
 206
 207 /**
 208  *      psb_framebuffer_create  -       create a framebuffer backed by gt
 209  *      @dev: our DRM device
 210  *      @mode_cmd: the description of the requested mode
 211  *      @gt: the backing object
 212  *
 213  *      Create a framebuffer object backed by the gt, and fill in the
 214  *      boilerplate required
 215  *
 216  *      TODO: review object references
 217  */
 218
 219 static struct drm_framebuffer *psb_framebuffer_create
 220                         (struct drm_device *dev,
 221                          const struct drm_mode_fb_cmd2 *mode_cmd,
 222                          struct drm_gem_object *obj)
 223 {
 224         struct drm_framebuffer *fb;
 225         int ret;
 226
 227         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 228         if (!fb)
 229                 return ERR_PTR(-ENOMEM);
 230
 231         ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
 232         if (ret) {
 233                 kfree(fb);
 234                 return ERR_PTR(ret);
 235         }
 236         return fb;
 237 }
 238
 239 /**
 240  *      psbfb_alloc             -       allocate frame buffer memory
 241  *      @dev: the DRM device
 242  *      @aligned_size: space needed
 243  *
 244  *      Allocate the frame buffer. In the usual case we get a GTT range that
 245  *      is stolen memory backed and life is simple. If there isn't sufficient
 246  *      we fail as we don't have the virtual mapping space to really vmap it
 247  *      and the kernel console code can't handle non linear framebuffers.
 248  *
 249  *      Re-address this as and if the framebuffer layer grows this ability.
 250  */
 251 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
 252 {
 253         struct gtt_range *backing;
 254         /* Begin by trying to use stolen memory backing */
 255         backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1, PAGE_SIZE);
 256         if (backing) {
 257                 backing->gem.funcs = &psb_gem_object_funcs;
 258                 drm_gem_private_object_init(dev, &backing->gem, aligned_size);
 259                 return backing;
 260         }
 261         return NULL;
 262 }
 263
 264 /**
 265  *      psbfb_create            -       create a framebuffer
 266  *      @fbdev: the framebuffer device
 267  *      @sizes: specification of the layout
 268  *
 269  *      Create a framebuffer to the specifications provided
 270  */
 271 static int psbfb_create(struct drm_fb_helper *fb_helper,
 272                                 struct drm_fb_helper_surface_size *sizes)
 273 {
 274         struct drm_device *dev = fb_helper->dev;
 275         struct drm_psb_private *dev_priv = dev->dev_private;
 276         struct fb_info *info;
 277         struct drm_framebuffer *fb;
 278         struct drm_mode_fb_cmd2 mode_cmd;
 279         int size;
 280         int ret;
 281         struct gtt_range *backing;
 282         u32 bpp, depth;
 283
 284         mode_cmd.width = sizes->surface_width;
 285         mode_cmd.height = sizes->surface_height;
 286         bpp = sizes->surface_bpp;
 287         depth = sizes->surface_depth;
 288
 289         /* No 24bit packed */
 290         if (bpp == 24)
 291                 bpp = 32;
 292
 293         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 8), 64);
 294
 295         size = mode_cmd.pitches[0] * mode_cmd.height;
 296         size = ALIGN(size, PAGE_SIZE);
 297
 298         /* Allocate the framebuffer in the GTT with stolen page backing */
 299         backing = psbfb_alloc(dev, size);
 300         if (backing == NULL)
 301                 return -ENOMEM;
 302
 303         memset(dev_priv->vram_addr + backing->offset, 0, size);
 304
 305         info = drm_fb_helper_alloc_fbi(fb_helper);
 306         if (IS_ERR(info)) {
 307                 ret = PTR_ERR(info);
 308                 goto out;
 309         }
 310
 311         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 312
 313         fb = psb_framebuffer_create(dev, &mode_cmd, &backing->gem);
 314         if (IS_ERR(fb)) {
 315                 ret = PTR_ERR(fb);
 316                 goto out;
 317         }
 318
 319         fb_helper->fb = fb;
 320
 321         if (dev_priv->ops->accel_2d)    /* 2D engine */
 322                 info->fbops = &psbfb_ops;
 323         else    /* Software */
 324                 info->fbops = &psbfb_unaccel_ops;
 325
 326         info->fix.smem_start = dev->mode_config.fb_base;
 327         info->fix.smem_len = size;
 328         info->fix.ywrapstep = 0;
 329         info->fix.ypanstep = 0;
 330
 331         /* Accessed stolen memory directly */
 332         info->screen_base = dev_priv->vram_addr + backing->offset;
 333         info->screen_size = size;
 334
 335         if (dev_priv->gtt.stolen_size) {
 336                 info->apertures->ranges[0].base = dev->mode_config.fb_base;
 337                 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
 338         }
 339
 340         drm_fb_helper_fill_info(info, fb_helper, sizes);
 341
 342         info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
 343         info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
 344
 345         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 346
 347         dev_dbg(dev->dev, "allocated %dx%d fb\n", fb->width, fb->height);
 348
 349         return 0;
 350 out:
 351         psb_gtt_free_range(dev, backing);
 352         return ret;
 353 }
 354
 355 /**
 356  *      psb_user_framebuffer_create     -       create framebuffer
 357  *      @dev: our DRM device
 358  *      @filp: client file
 359  *      @cmd: mode request
 360  *
 361  *      Create a new framebuffer backed by a userspace GEM object
 362  */
 363 static struct drm_framebuffer *psb_user_framebuffer_create
 364                         (struct drm_device *dev, struct drm_file *filp,
 365                          const struct drm_mode_fb_cmd2 *cmd)
 366 {
 367         struct drm_gem_object *obj;
 368
 369         /*
 370          *      Find the GEM object and thus the gtt range object that is
 371          *      to back this space
 372          */
 373         obj = drm_gem_object_lookup(filp, cmd->handles[0]);
 374         if (obj == NULL)
 375                 return ERR_PTR(-ENOENT);
 376
 377         /* Let the core code do all the work */
 378         return psb_framebuffer_create(dev, cmd, obj);
 379 }
 380
 381 static int psbfb_probe(struct drm_fb_helper *fb_helper,
 382                                 struct drm_fb_helper_surface_size *sizes)
 383 {
 384         struct drm_device *dev = fb_helper->dev;
 385         struct drm_psb_private *dev_priv = dev->dev_private;
 386         unsigned int fb_size;
 387         int bytespp;
 388
 389         bytespp = sizes->surface_bpp / 8;
 390         if (bytespp == 3)       /* no 24bit packed */
 391                 bytespp = 4;
 392
 393         /* If the mode will not fit in 32bit then switch to 16bit to get
 394            a console on full resolution. The X mode setting server will
 395            allocate its own 32bit GEM framebuffer */
 396         fb_size = ALIGN(sizes->surface_width * bytespp, 64) *
 397                   sizes->surface_height;
 398         fb_size = ALIGN(fb_size, PAGE_SIZE);
 399
 400         if (fb_size > dev_priv->vram_stolen_size) {
 401                 sizes->surface_bpp = 16;
 402                 sizes->surface_depth = 16;
 403         }
 404
 405         return psbfb_create(fb_helper, sizes);
 406 }
 407
 408 static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 409         .fb_probe = psbfb_probe,
 410 };
 411
 412 static int psb_fbdev_destroy(struct drm_device *dev,
 413                              struct drm_fb_helper *fb_helper)
 414 {
 415         struct drm_framebuffer *fb = fb_helper->fb;
 416
 417         drm_fb_helper_unregister_fbi(fb_helper);
 418
 419         drm_fb_helper_fini(fb_helper);
 420         drm_framebuffer_unregister_private(fb);
 421         drm_framebuffer_cleanup(fb);
 422
 423         if (fb->obj[0])
 424                 drm_gem_object_put(fb->obj[0]);
 425         kfree(fb);
 426
 427         return 0;
 428 }
 429
 430 int psb_fbdev_init(struct drm_device *dev)
 431 {
 432         struct drm_fb_helper *fb_helper;
 433         struct drm_psb_private *dev_priv = dev->dev_private;
 434         int ret;
 435
 436         fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
 437         if (!fb_helper) {
 438                 dev_err(dev->dev, "no memory\n");
 439                 return -ENOMEM;
 440         }
 441
 442         dev_priv->fb_helper = fb_helper;
 443
 444         drm_fb_helper_prepare(dev, fb_helper, &psb_fb_helper_funcs);
 445
 446         ret = drm_fb_helper_init(dev, fb_helper);
 447         if (ret)
 448                 goto free;
 449
 450         /* disable all the possible outputs/crtcs before entering KMS mode */
 451         drm_helper_disable_unused_functions(dev);
 452
 453         ret = drm_fb_helper_initial_config(fb_helper, 32);
 454         if (ret)
 455                 goto fini;
 456
 457         return 0;
 458
 459 fini:
 460         drm_fb_helper_fini(fb_helper);
 461 free:
 462         kfree(fb_helper);
 463         return ret;
 464 }
 465
 466 static void psb_fbdev_fini(struct drm_device *dev)
 467 {
 468         struct drm_psb_private *dev_priv = dev->dev_private;
 469
 470         if (!dev_priv->fb_helper)
 471                 return;
 472
 473         psb_fbdev_destroy(dev, dev_priv->fb_helper);
 474         kfree(dev_priv->fb_helper);
 475         dev_priv->fb_helper = NULL;
 476 }
 477
 478 static const struct drm_mode_config_funcs psb_mode_funcs = {
 479         .fb_create = psb_user_framebuffer_create,
 480         .output_poll_changed = drm_fb_helper_output_poll_changed,
 481 };
 482
 483 static void psb_setup_outputs(struct drm_device *dev)
 484 {
 485         struct drm_psb_private *dev_priv = dev->dev_private;
 486         struct drm_connector *connector;
 487
 488         drm_mode_create_scaling_mode_property(dev);
 489
 490         /* It is ok for this to fail - we just don't get backlight control */
 491         if (!dev_priv->backlight_property)
 492                 dev_priv->backlight_property = drm_property_create_range(dev, 0,
 493                                                         "backlight", 0, 100);
 494         dev_priv->ops->output_init(dev);
 495
 496         list_for_each_entry(connector, &dev->mode_config.connector_list,
 497                             head) {
 498                 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 499                 struct drm_encoder *encoder = &gma_encoder->base;
 500                 int crtc_mask = 0, clone_mask = 0;
 501
 502                 /* valid crtcs */
 503                 switch (gma_encoder->type) {
 504                 case INTEL_OUTPUT_ANALOG:
 505                         crtc_mask = (1 << 0);
 506                         clone_mask = (1 << INTEL_OUTPUT_ANALOG);
 507                         break;
 508                 case INTEL_OUTPUT_SDVO:
 509                         crtc_mask = dev_priv->ops->sdvo_mask;
 510                         clone_mask = 0;
 511                         break;
 512                 case INTEL_OUTPUT_LVDS:
 513                         crtc_mask = dev_priv->ops->lvds_mask;
 514                         clone_mask = 0;
 515                         break;
 516                 case INTEL_OUTPUT_MIPI:
 517                         crtc_mask = (1 << 0);
 518                         clone_mask = 0;
 519                         break;
 520                 case INTEL_OUTPUT_MIPI2:
 521                         crtc_mask = (1 << 2);
 522                         clone_mask = 0;
 523                         break;
 524                 case INTEL_OUTPUT_HDMI:
 525                         crtc_mask = dev_priv->ops->hdmi_mask;
 526                         clone_mask = (1 << INTEL_OUTPUT_HDMI);
 527                         break;
 528                 case INTEL_OUTPUT_DISPLAYPORT:
 529                         crtc_mask = (1 << 0) | (1 << 1);
 530                         clone_mask = 0;
 531                         break;
 532                 case INTEL_OUTPUT_EDP:
 533                         crtc_mask = (1 << 1);
 534                         clone_mask = 0;
 535                 }
 536                 encoder->possible_crtcs = crtc_mask;
 537                 encoder->possible_clones =
 538                     gma_connector_clones(dev, clone_mask);
 539         }
 540 }
 541
 542 void psb_modeset_init(struct drm_device *dev)
 543 {
 544         struct drm_psb_private *dev_priv = dev->dev_private;
 545         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 546         int i;
 547
 548         drm_mode_config_init(dev);
 549
 550         dev->mode_config.min_width = 0;
 551         dev->mode_config.min_height = 0;
 552
 553         dev->mode_config.funcs = &psb_mode_funcs;
 554
 555         /* set memory base */
 556         /* Oaktrail and Poulsbo should use BAR 2*/
 557         pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
 558                                         &(dev->mode_config.fb_base));
 559
 560         /* num pipes is 2 for PSB but 1 for Mrst */
 561         for (i = 0; i < dev_priv->num_pipe; i++)
 562                 psb_intel_crtc_init(dev, i, mode_dev);
 563
 564         dev->mode_config.max_width = 4096;
 565         dev->mode_config.max_height = 4096;
 566
 567         psb_setup_outputs(dev);
 568
 569         if (dev_priv->ops->errata)
 570                 dev_priv->ops->errata(dev);
 571
 572         dev_priv->modeset = true;
 573 }
 574
 575 void psb_modeset_cleanup(struct drm_device *dev)
 576 {
 577         struct drm_psb_private *dev_priv = dev->dev_private;
 578         if (dev_priv->modeset) {
 579                 drm_kms_helper_poll_fini(dev);
 580                 psb_fbdev_fini(dev);
 581                 drm_mode_config_cleanup(dev);
 582         }
 583 }