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->mode_config.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->mode_config.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->mode_config.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 } 555