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