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_framebuffer.h>
  25 #include <drm/drm_gem_framebuffer_helper.h>
  26
  27 #include "framebuffer.h"
  28 #include "gem.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 = to_drm_psb_private(dev);
  85         struct psb_gem_object *pobj = to_psb_gem_object(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 + pobj->offset;
  92
  93         page_num = vma_pages(vma);
  94         address = vmf->address - (vmf->pgoff << PAGE_SHIFT);
  95
  96         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
  97
  98         for (i = 0; i < page_num; i++) {
  99                 pfn = (phys_addr >> PAGE_SHIFT);
 100
 101                 ret = vmf_insert_mixed(vma, address,
 102                                 __pfn_to_pfn_t(pfn, PFN_DEV));
 103                 if (unlikely(ret & VM_FAULT_ERROR))
 104                         break;
 105                 address += PAGE_SIZE;
 106                 phys_addr += PAGE_SIZE;
 107         }
 108         return ret;
 109 }
 110
 111 static void psbfb_vm_open(struct vm_area_struct *vma)
 112 {
 113 }
 114
 115 static void psbfb_vm_close(struct vm_area_struct *vma)
 116 {
 117 }
 118
 119 static const struct vm_operations_struct psbfb_vm_ops = {
 120         .fault  = psbfb_vm_fault,
 121         .open   = psbfb_vm_open,
 122         .close  = psbfb_vm_close
 123 };
 124
 125 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 126 {
 127         struct drm_fb_helper *fb_helper = info->par;
 128         struct drm_framebuffer *fb = fb_helper->fb;
 129
 130         if (vma->vm_pgoff != 0)
 131                 return -EINVAL;
 132         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 133                 return -EINVAL;
 134
 135         /*
 136          * If this is a GEM object then info->screen_base is the virtual
 137          * kernel remapping of the object. FIXME: Review if this is
 138          * suitable for our mmap work
 139          */
 140         vma->vm_ops = &psbfb_vm_ops;
 141         vma->vm_private_data = (void *)fb;
 142         vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
 143         return 0;
 144 }
 145
 146 static const struct fb_ops psbfb_unaccel_ops = {
 147         .owner = THIS_MODULE,
 148         DRM_FB_HELPER_DEFAULT_OPS,
 149         .fb_setcolreg = psbfb_setcolreg,
 150         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 151         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 152         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 153         .fb_mmap = psbfb_mmap,
 154 };
 155
 156 /**
 157  *      psb_framebuffer_init    -       initialize a framebuffer
 158  *      @dev: our DRM device
 159  *      @fb: framebuffer to set up
 160  *      @mode_cmd: mode description
 161  *      @obj: backing object
 162  *
 163  *      Configure and fill in the boilerplate for our frame buffer. Return
 164  *      0 on success or an error code if we fail.
 165  */
 166 static int psb_framebuffer_init(struct drm_device *dev,
 167                                         struct drm_framebuffer *fb,
 168                                         const struct drm_mode_fb_cmd2 *mode_cmd,
 169                                         struct drm_gem_object *obj)
 170 {
 171         const struct drm_format_info *info;
 172         int ret;
 173
 174         /*
 175          * Reject unknown formats, YUV formats, and formats with more than
 176          * 4 bytes per pixel.
 177          */
 178         info = drm_get_format_info(dev, mode_cmd);
 179         if (!info || !info->depth || info->cpp[0] > 4)
 180                 return -EINVAL;
 181
 182         if (mode_cmd->pitches[0] & 63)
 183                 return -EINVAL;
 184
 185         drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
 186         fb->obj[0] = obj;
 187         ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
 188         if (ret) {
 189                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 190                 return ret;
 191         }
 192         return 0;
 193 }
 194
 195 /**
 196  *      psb_framebuffer_create  -       create a framebuffer backed by gt
 197  *      @dev: our DRM device
 198  *      @mode_cmd: the description of the requested mode
 199  *      @obj: the backing object
 200  *
 201  *      Create a framebuffer object backed by the gt, and fill in the
 202  *      boilerplate required
 203  *
 204  *      TODO: review object references
 205  */
 206
 207 static struct drm_framebuffer *psb_framebuffer_create
 208                         (struct drm_device *dev,
 209                          const struct drm_mode_fb_cmd2 *mode_cmd,
 210                          struct drm_gem_object *obj)
 211 {
 212         struct drm_framebuffer *fb;
 213         int ret;
 214
 215         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 216         if (!fb)
 217                 return ERR_PTR(-ENOMEM);
 218
 219         ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
 220         if (ret) {
 221                 kfree(fb);
 222                 return ERR_PTR(ret);
 223         }
 224         return fb;
 225 }
 226
 227 /**
 228  *      psbfb_create            -       create a framebuffer
 229  *      @fb_helper: the framebuffer helper
 230  *      @sizes: specification of the layout
 231  *
 232  *      Create a framebuffer to the specifications provided
 233  */
 234 static int psbfb_create(struct drm_fb_helper *fb_helper,
 235                                 struct drm_fb_helper_surface_size *sizes)
 236 {
 237         struct drm_device *dev = fb_helper->dev;
 238         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 239         struct pci_dev *pdev = to_pci_dev(dev->dev);
 240         struct fb_info *info;
 241         struct drm_framebuffer *fb;
 242         struct drm_mode_fb_cmd2 mode_cmd;
 243         int size;
 244         int ret;
 245         struct psb_gem_object *backing;
 246         struct drm_gem_object *obj;
 247         u32 bpp, depth;
 248
 249         mode_cmd.width = sizes->surface_width;
 250         mode_cmd.height = sizes->surface_height;
 251         bpp = sizes->surface_bpp;
 252         depth = sizes->surface_depth;
 253
 254         /* No 24bit packed */
 255         if (bpp == 24)
 256                 bpp = 32;
 257
 258         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 8), 64);
 259
 260         size = mode_cmd.pitches[0] * mode_cmd.height;
 261         size = ALIGN(size, PAGE_SIZE);
 262
 263         /* Allocate the framebuffer in the GTT with stolen page backing */
 264         backing = psb_gem_create(dev, size, "fb", true, PAGE_SIZE);
 265         if (IS_ERR(backing))
 266                 return PTR_ERR(backing);
 267         obj = &backing->base;
 268
 269         memset(dev_priv->vram_addr + backing->offset, 0, size);
 270
 271         info = drm_fb_helper_alloc_fbi(fb_helper);
 272         if (IS_ERR(info)) {
 273                 ret = PTR_ERR(info);
 274                 goto err_drm_gem_object_put;
 275         }
 276
 277         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 278
 279         fb = psb_framebuffer_create(dev, &mode_cmd, obj);
 280         if (IS_ERR(fb)) {
 281                 ret = PTR_ERR(fb);
 282                 goto err_drm_gem_object_put;
 283         }
 284
 285         fb_helper->fb = fb;
 286
 287         info->fbops = &psbfb_unaccel_ops;
 288
 289         info->fix.smem_start = dev_priv->fb_base;
 290         info->fix.smem_len = size;
 291         info->fix.ywrapstep = 0;
 292         info->fix.ypanstep = 0;
 293
 294         /* Accessed stolen memory directly */
 295         info->screen_base = dev_priv->vram_addr + backing->offset;
 296         info->screen_size = size;
 297
 298         if (dev_priv->gtt.stolen_size) {
 299                 info->apertures->ranges[0].base = dev_priv->fb_base;
 300                 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
 301         }
 302
 303         drm_fb_helper_fill_info(info, fb_helper, sizes);
 304
 305         info->fix.mmio_start = pci_resource_start(pdev, 0);
 306         info->fix.mmio_len = pci_resource_len(pdev, 0);
 307
 308         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 309
 310         dev_dbg(dev->dev, "allocated %dx%d fb\n", fb->width, fb->height);
 311
 312         return 0;
 313
 314 err_drm_gem_object_put:
 315         drm_gem_object_put(obj);
 316         return ret;
 317 }
 318
 319 /**
 320  *      psb_user_framebuffer_create     -       create framebuffer
 321  *      @dev: our DRM device
 322  *      @filp: client file
 323  *      @cmd: mode request
 324  *
 325  *      Create a new framebuffer backed by a userspace GEM object
 326  */
 327 static struct drm_framebuffer *psb_user_framebuffer_create
 328                         (struct drm_device *dev, struct drm_file *filp,
 329                          const struct drm_mode_fb_cmd2 *cmd)
 330 {
 331         struct drm_gem_object *obj;
 332         struct drm_framebuffer *fb;
 333
 334         /*
 335          *      Find the GEM object and thus the gtt range object that is
 336          *      to back this space
 337          */
 338         obj = drm_gem_object_lookup(filp, cmd->handles[0]);
 339         if (obj == NULL)
 340                 return ERR_PTR(-ENOENT);
 341
 342         /* Let the core code do all the work */
 343         fb = psb_framebuffer_create(dev, cmd, obj);
 344         if (IS_ERR(fb))
 345                 drm_gem_object_put(obj);
 346
 347         return fb;
 348 }
 349
 350 static int psbfb_probe(struct drm_fb_helper *fb_helper,
 351                                 struct drm_fb_helper_surface_size *sizes)
 352 {
 353         struct drm_device *dev = fb_helper->dev;
 354         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 355         unsigned int fb_size;
 356         int bytespp;
 357
 358         bytespp = sizes->surface_bpp / 8;
 359         if (bytespp == 3)       /* no 24bit packed */
 360                 bytespp = 4;
 361
 362         /* If the mode will not fit in 32bit then switch to 16bit to get
 363            a console on full resolution. The X mode setting server will
 364            allocate its own 32bit GEM framebuffer */
 365         fb_size = ALIGN(sizes->surface_width * bytespp, 64) *
 366                   sizes->surface_height;
 367         fb_size = ALIGN(fb_size, PAGE_SIZE);
 368
 369         if (fb_size > dev_priv->vram_stolen_size) {
 370                 sizes->surface_bpp = 16;
 371                 sizes->surface_depth = 16;
 372         }
 373
 374         return psbfb_create(fb_helper, sizes);
 375 }
 376
 377 static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 378         .fb_probe = psbfb_probe,
 379 };
 380
 381 static int psb_fbdev_destroy(struct drm_device *dev,
 382                              struct drm_fb_helper *fb_helper)
 383 {
 384         struct drm_framebuffer *fb = fb_helper->fb;
 385
 386         drm_fb_helper_unregister_fbi(fb_helper);
 387
 388         drm_fb_helper_fini(fb_helper);
 389         drm_framebuffer_unregister_private(fb);
 390         drm_framebuffer_cleanup(fb);
 391
 392         if (fb->obj[0])
 393                 drm_gem_object_put(fb->obj[0]);
 394         kfree(fb);
 395
 396         return 0;
 397 }
 398
 399 int psb_fbdev_init(struct drm_device *dev)
 400 {
 401         struct drm_fb_helper *fb_helper;
 402         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 403         int ret;
 404
 405         fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
 406         if (!fb_helper) {
 407                 dev_err(dev->dev, "no memory\n");
 408                 return -ENOMEM;
 409         }
 410
 411         dev_priv->fb_helper = fb_helper;
 412
 413         drm_fb_helper_prepare(dev, fb_helper, &psb_fb_helper_funcs);
 414
 415         ret = drm_fb_helper_init(dev, fb_helper);
 416         if (ret)
 417                 goto free;
 418
 419         /* disable all the possible outputs/crtcs before entering KMS mode */
 420         drm_helper_disable_unused_functions(dev);
 421
 422         ret = drm_fb_helper_initial_config(fb_helper, 32);
 423         if (ret)
 424                 goto fini;
 425
 426         return 0;
 427
 428 fini:
 429         drm_fb_helper_fini(fb_helper);
 430 free:
 431         kfree(fb_helper);
 432         return ret;
 433 }
 434
 435 static void psb_fbdev_fini(struct drm_device *dev)
 436 {
 437         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 438
 439         if (!dev_priv->fb_helper)
 440                 return;
 441
 442         psb_fbdev_destroy(dev, dev_priv->fb_helper);
 443         kfree(dev_priv->fb_helper);
 444         dev_priv->fb_helper = NULL;
 445 }
 446
 447 static const struct drm_mode_config_funcs psb_mode_funcs = {
 448         .fb_create = psb_user_framebuffer_create,
 449         .output_poll_changed = drm_fb_helper_output_poll_changed,
 450 };
 451
 452 static void psb_setup_outputs(struct drm_device *dev)
 453 {
 454         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 455         struct drm_connector_list_iter conn_iter;
 456         struct drm_connector *connector;
 457
 458         drm_mode_create_scaling_mode_property(dev);
 459
 460         /* It is ok for this to fail - we just don't get backlight control */
 461         if (!dev_priv->backlight_property)
 462                 dev_priv->backlight_property = drm_property_create_range(dev, 0,
 463                                                         "backlight", 0, 100);
 464         dev_priv->ops->output_init(dev);
 465
 466         drm_connector_list_iter_begin(dev, &conn_iter);
 467         drm_for_each_connector_iter(connector, &conn_iter) {
 468                 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 469                 struct drm_encoder *encoder = &gma_encoder->base;
 470                 int crtc_mask = 0, clone_mask = 0;
 471
 472                 /* valid crtcs */
 473                 switch (gma_encoder->type) {
 474                 case INTEL_OUTPUT_ANALOG:
 475                         crtc_mask = (1 << 0);
 476                         clone_mask = (1 << INTEL_OUTPUT_ANALOG);
 477                         break;
 478                 case INTEL_OUTPUT_SDVO:
 479                         crtc_mask = dev_priv->ops->sdvo_mask;
 480                         clone_mask = 0;
 481                         break;
 482                 case INTEL_OUTPUT_LVDS:
 483                         crtc_mask = dev_priv->ops->lvds_mask;
 484                         clone_mask = 0;
 485                         break;
 486                 case INTEL_OUTPUT_MIPI:
 487                         crtc_mask = (1 << 0);
 488                         clone_mask = 0;
 489                         break;
 490                 case INTEL_OUTPUT_MIPI2:
 491                         crtc_mask = (1 << 2);
 492                         clone_mask = 0;
 493                         break;
 494                 case INTEL_OUTPUT_HDMI:
 495                         crtc_mask = dev_priv->ops->hdmi_mask;
 496                         clone_mask = (1 << INTEL_OUTPUT_HDMI);
 497                         break;
 498                 case INTEL_OUTPUT_DISPLAYPORT:
 499                         crtc_mask = (1 << 0) | (1 << 1);
 500                         clone_mask = 0;
 501                         break;
 502                 case INTEL_OUTPUT_EDP:
 503                         crtc_mask = (1 << 1);
 504                         clone_mask = 0;
 505                 }
 506                 encoder->possible_crtcs = crtc_mask;
 507                 encoder->possible_clones =
 508                     gma_connector_clones(dev, clone_mask);
 509         }
 510         drm_connector_list_iter_end(&conn_iter);
 511 }
 512
 513 void psb_modeset_init(struct drm_device *dev)
 514 {
 515         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 516         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 517         struct pci_dev *pdev = to_pci_dev(dev->dev);
 518         int i;
 519
 520         if (drmm_mode_config_init(dev))
 521                 return;
 522
 523         dev->mode_config.min_width = 0;
 524         dev->mode_config.min_height = 0;
 525
 526         dev->mode_config.funcs = &psb_mode_funcs;
 527
 528         /* set memory base */
 529         /* Oaktrail and Poulsbo should use BAR 2*/
 530         pci_read_config_dword(pdev, PSB_BSM, (u32 *)&(dev_priv->fb_base));
 531
 532         /* num pipes is 2 for PSB but 1 for Mrst */
 533         for (i = 0; i < dev_priv->num_pipe; i++)
 534                 psb_intel_crtc_init(dev, i, mode_dev);
 535
 536         dev->mode_config.max_width = 4096;
 537         dev->mode_config.max_height = 4096;
 538
 539         psb_setup_outputs(dev);
 540
 541         if (dev_priv->ops->errata)
 542                 dev_priv->ops->errata(dev);
 543
 544         dev_priv->modeset = true;
 545 }
 546
 547 void psb_modeset_cleanup(struct drm_device *dev)
 548 {
 549         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 550         if (dev_priv->modeset) {
 551                 drm_kms_helper_poll_fini(dev);
 552                 psb_fbdev_fini(dev);
 553         }
 554 }