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 } 554