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_crtc_helper.h> 23 #include <drm/drm_fb_helper.h> 24 #include <drm/drm_fourcc.h> 25 #include <drm/drm_framebuffer.h> 26 #include <drm/drm_gem_framebuffer_helper.h> 27 #include <drm/drm_modeset_helper.h> 28 29 #include "framebuffer.h" 30 #include "gem.h" 31 #include "psb_drv.h" 32 #include "psb_intel_drv.h" 33 #include "psb_intel_reg.h" 34 35 static const struct drm_framebuffer_funcs psb_fb_funcs = { 36 .destroy = drm_gem_fb_destroy, 37 .create_handle = drm_gem_fb_create_handle, 38 }; 39 40 #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16) 41 42 static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green, 43 unsigned blue, unsigned transp, 44 struct fb_info *info) 45 { 46 struct drm_fb_helper *fb_helper = info->par; 47 struct drm_framebuffer *fb = fb_helper->fb; 48 uint32_t v; 49 50 if (!fb) 51 return -ENOMEM; 52 53 if (regno > 255) 54 return 1; 55 56 red = CMAP_TOHW(red, info->var.red.length); 57 blue = CMAP_TOHW(blue, info->var.blue.length); 58 green = CMAP_TOHW(green, info->var.green.length); 59 transp = CMAP_TOHW(transp, info->var.transp.length); 60 61 v = (red << info->var.red.offset) | 62 (green << info->var.green.offset) | 63 (blue << info->var.blue.offset) | 64 (transp << info->var.transp.offset); 65 66 if (regno < 16) { 67 switch (fb->format->cpp[0] * 8) { 68 case 16: 69 ((uint32_t *) info->pseudo_palette)[regno] = v; 70 break; 71 case 24: 72 case 32: 73 ((uint32_t *) info->pseudo_palette)[regno] = v; 74 break; 75 } 76 } 77 78 return 0; 79 } 80 81 static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf) 82 { 83 struct vm_area_struct *vma = vmf->vma; 84 struct drm_framebuffer *fb = vma->vm_private_data; 85 struct drm_device *dev = fb->dev; 86 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 87 struct psb_gem_object *pobj = to_psb_gem_object(fb->obj[0]); 88 int page_num; 89 int i; 90 unsigned long address; 91 vm_fault_t ret = VM_FAULT_SIGBUS; 92 unsigned long pfn; 93 unsigned long phys_addr = (unsigned long)dev_priv->stolen_base + pobj->offset; 94 95 page_num = vma_pages(vma); 96 address = vmf->address - (vmf->pgoff << PAGE_SHIFT); 97 98 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 99 100 for (i = 0; i < page_num; i++) { 101 pfn = (phys_addr >> PAGE_SHIFT); 102 103 ret = vmf_insert_mixed(vma, address, 104 __pfn_to_pfn_t(pfn, PFN_DEV)); 105 if (unlikely(ret & VM_FAULT_ERROR)) 106 break; 107 address += PAGE_SIZE; 108 phys_addr += PAGE_SIZE; 109 } 110 return ret; 111 } 112 113 static void psbfb_vm_open(struct vm_area_struct *vma) 114 { 115 } 116 117 static void psbfb_vm_close(struct vm_area_struct *vma) 118 { 119 } 120 121 static const struct vm_operations_struct psbfb_vm_ops = { 122 .fault = psbfb_vm_fault, 123 .open = psbfb_vm_open, 124 .close = psbfb_vm_close 125 }; 126 127 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma) 128 { 129 struct drm_fb_helper *fb_helper = info->par; 130 struct drm_framebuffer *fb = fb_helper->fb; 131 132 if (vma->vm_pgoff != 0) 133 return -EINVAL; 134 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) 135 return -EINVAL; 136 137 /* 138 * If this is a GEM object then info->screen_base is the virtual 139 * kernel remapping of the object. FIXME: Review if this is 140 * suitable for our mmap work 141 */ 142 vma->vm_ops = &psbfb_vm_ops; 143 vma->vm_private_data = (void *)fb; 144 vm_flags_set(vma, VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP); 145 return 0; 146 } 147 148 static const struct fb_ops psbfb_unaccel_ops = { 149 .owner = THIS_MODULE, 150 DRM_FB_HELPER_DEFAULT_OPS, 151 .fb_setcolreg = psbfb_setcolreg, 152 .fb_read = drm_fb_helper_cfb_read, 153 .fb_write = drm_fb_helper_cfb_write, 154 .fb_fillrect = drm_fb_helper_cfb_fillrect, 155 .fb_copyarea = drm_fb_helper_cfb_copyarea, 156 .fb_imageblit = drm_fb_helper_cfb_imageblit, 157 .fb_mmap = psbfb_mmap, 158 }; 159 160 /** 161 * psb_framebuffer_init - initialize a framebuffer 162 * @dev: our DRM device 163 * @fb: framebuffer to set up 164 * @mode_cmd: mode description 165 * @obj: backing object 166 * 167 * Configure and fill in the boilerplate for our frame buffer. Return 168 * 0 on success or an error code if we fail. 169 */ 170 static int psb_framebuffer_init(struct drm_device *dev, 171 struct drm_framebuffer *fb, 172 const struct drm_mode_fb_cmd2 *mode_cmd, 173 struct drm_gem_object *obj) 174 { 175 const struct drm_format_info *info; 176 int ret; 177 178 /* 179 * Reject unknown formats, YUV formats, and formats with more than 180 * 4 bytes per pixel. 181 */ 182 info = drm_get_format_info(dev, mode_cmd); 183 if (!info || !info->depth || info->cpp[0] > 4) 184 return -EINVAL; 185 186 if (mode_cmd->pitches[0] & 63) 187 return -EINVAL; 188 189 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 190 fb->obj[0] = obj; 191 ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs); 192 if (ret) { 193 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 194 return ret; 195 } 196 return 0; 197 } 198 199 /** 200 * psb_framebuffer_create - create a framebuffer backed by gt 201 * @dev: our DRM device 202 * @mode_cmd: the description of the requested mode 203 * @obj: the backing object 204 * 205 * Create a framebuffer object backed by the gt, and fill in the 206 * boilerplate required 207 * 208 * TODO: review object references 209 */ 210 211 static struct drm_framebuffer *psb_framebuffer_create 212 (struct drm_device *dev, 213 const struct drm_mode_fb_cmd2 *mode_cmd, 214 struct drm_gem_object *obj) 215 { 216 struct drm_framebuffer *fb; 217 int ret; 218 219 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 220 if (!fb) 221 return ERR_PTR(-ENOMEM); 222 223 ret = psb_framebuffer_init(dev, fb, mode_cmd, obj); 224 if (ret) { 225 kfree(fb); 226 return ERR_PTR(ret); 227 } 228 return fb; 229 } 230 231 /** 232 * psbfb_create - create a framebuffer 233 * @fb_helper: the framebuffer helper 234 * @sizes: specification of the layout 235 * 236 * Create a framebuffer to the specifications provided 237 */ 238 static int psbfb_create(struct drm_fb_helper *fb_helper, 239 struct drm_fb_helper_surface_size *sizes) 240 { 241 struct drm_device *dev = fb_helper->dev; 242 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 243 struct pci_dev *pdev = to_pci_dev(dev->dev); 244 struct fb_info *info; 245 struct drm_framebuffer *fb; 246 struct drm_mode_fb_cmd2 mode_cmd; 247 int size; 248 int ret; 249 struct psb_gem_object *backing; 250 struct drm_gem_object *obj; 251 u32 bpp, depth; 252 253 mode_cmd.width = sizes->surface_width; 254 mode_cmd.height = sizes->surface_height; 255 bpp = sizes->surface_bpp; 256 depth = sizes->surface_depth; 257 258 /* No 24bit packed */ 259 if (bpp == 24) 260 bpp = 32; 261 262 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 8), 64); 263 264 size = mode_cmd.pitches[0] * mode_cmd.height; 265 size = ALIGN(size, PAGE_SIZE); 266 267 /* Allocate the framebuffer in the GTT with stolen page backing */ 268 backing = psb_gem_create(dev, size, "fb", true, PAGE_SIZE); 269 if (IS_ERR(backing)) 270 return PTR_ERR(backing); 271 obj = &backing->base; 272 273 memset(dev_priv->vram_addr + backing->offset, 0, size); 274 275 info = drm_fb_helper_alloc_info(fb_helper); 276 if (IS_ERR(info)) { 277 ret = PTR_ERR(info); 278 goto err_drm_gem_object_put; 279 } 280 281 mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth); 282 283 fb = psb_framebuffer_create(dev, &mode_cmd, obj); 284 if (IS_ERR(fb)) { 285 ret = PTR_ERR(fb); 286 goto err_drm_gem_object_put; 287 } 288 289 fb_helper->fb = fb; 290 291 info->fbops = &psbfb_unaccel_ops; 292 293 info->fix.smem_start = dev_priv->fb_base; 294 info->fix.smem_len = size; 295 info->fix.ywrapstep = 0; 296 info->fix.ypanstep = 0; 297 298 /* Accessed stolen memory directly */ 299 info->screen_base = dev_priv->vram_addr + backing->offset; 300 info->screen_size = size; 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_info(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, 32, &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); 422 if (ret) 423 goto fini; 424 425 return 0; 426 427 fini: 428 drm_fb_helper_fini(fb_helper); 429 free: 430 drm_fb_helper_unprepare(fb_helper); 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 drm_fb_helper_unprepare(dev_priv->fb_helper); 444 kfree(dev_priv->fb_helper); 445 dev_priv->fb_helper = NULL; 446 } 447 448 static const struct drm_mode_config_funcs psb_mode_funcs = { 449 .fb_create = psb_user_framebuffer_create, 450 .output_poll_changed = drm_fb_helper_output_poll_changed, 451 }; 452 453 static void psb_setup_outputs(struct drm_device *dev) 454 { 455 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 456 struct drm_connector_list_iter conn_iter; 457 struct drm_connector *connector; 458 459 drm_mode_create_scaling_mode_property(dev); 460 461 /* It is ok for this to fail - we just don't get backlight control */ 462 if (!dev_priv->backlight_property) 463 dev_priv->backlight_property = drm_property_create_range(dev, 0, 464 "backlight", 0, 100); 465 dev_priv->ops->output_init(dev); 466 467 drm_connector_list_iter_begin(dev, &conn_iter); 468 drm_for_each_connector_iter(connector, &conn_iter) { 469 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 470 struct drm_encoder *encoder = &gma_encoder->base; 471 int crtc_mask = 0, clone_mask = 0; 472 473 /* valid crtcs */ 474 switch (gma_encoder->type) { 475 case INTEL_OUTPUT_ANALOG: 476 crtc_mask = (1 << 0); 477 clone_mask = (1 << INTEL_OUTPUT_ANALOG); 478 break; 479 case INTEL_OUTPUT_SDVO: 480 crtc_mask = dev_priv->ops->sdvo_mask; 481 clone_mask = 0; 482 break; 483 case INTEL_OUTPUT_LVDS: 484 crtc_mask = dev_priv->ops->lvds_mask; 485 clone_mask = 0; 486 break; 487 case INTEL_OUTPUT_MIPI: 488 crtc_mask = (1 << 0); 489 clone_mask = 0; 490 break; 491 case INTEL_OUTPUT_MIPI2: 492 crtc_mask = (1 << 2); 493 clone_mask = 0; 494 break; 495 case INTEL_OUTPUT_HDMI: 496 crtc_mask = dev_priv->ops->hdmi_mask; 497 clone_mask = (1 << INTEL_OUTPUT_HDMI); 498 break; 499 case INTEL_OUTPUT_DISPLAYPORT: 500 crtc_mask = (1 << 0) | (1 << 1); 501 clone_mask = 0; 502 break; 503 case INTEL_OUTPUT_EDP: 504 crtc_mask = (1 << 1); 505 clone_mask = 0; 506 } 507 encoder->possible_crtcs = crtc_mask; 508 encoder->possible_clones = 509 gma_connector_clones(dev, clone_mask); 510 } 511 drm_connector_list_iter_end(&conn_iter); 512 } 513 514 void psb_modeset_init(struct drm_device *dev) 515 { 516 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 517 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 518 struct pci_dev *pdev = to_pci_dev(dev->dev); 519 int i; 520 521 if (drmm_mode_config_init(dev)) 522 return; 523 524 dev->mode_config.min_width = 0; 525 dev->mode_config.min_height = 0; 526 527 dev->mode_config.funcs = &psb_mode_funcs; 528 529 /* set memory base */ 530 /* Oaktrail and Poulsbo should use BAR 2*/ 531 pci_read_config_dword(pdev, PSB_BSM, (u32 *)&(dev_priv->fb_base)); 532 533 /* num pipes is 2 for PSB but 1 for Mrst */ 534 for (i = 0; i < dev_priv->num_pipe; i++) 535 psb_intel_crtc_init(dev, i, mode_dev); 536 537 dev->mode_config.max_width = 4096; 538 dev->mode_config.max_height = 4096; 539 540 psb_setup_outputs(dev); 541 542 if (dev_priv->ops->errata) 543 dev_priv->ops->errata(dev); 544 545 dev_priv->modeset = true; 546 } 547 548 void psb_modeset_cleanup(struct drm_device *dev) 549 { 550 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 551 if (dev_priv->modeset) { 552 drm_kms_helper_poll_fini(dev); 553 psb_fbdev_fini(dev); 554 } 555 } 556