sunxi_drm.c revision 1.10
1 /* $NetBSD: sunxi_drm.c,v 1.10 2019/12/15 01:00:58 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 2019 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: sunxi_drm.c,v 1.10 2019/12/15 01:00:58 mrg Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/intr.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/conf.h> 39 40 #include <uvm/uvm_extern.h> 41 #include <uvm/uvm_object.h> 42 #include <uvm/uvm_device.h> 43 44 #include <drm/drmP.h> 45 #include <drm/drm_crtc_helper.h> 46 #include <drm/drm_fb_helper.h> 47 48 #include <dev/fdt/fdtvar.h> 49 #include <dev/fdt/fdt_port.h> 50 51 #include <arm/sunxi/sunxi_drm.h> 52 53 #define SUNXI_DRM_MAX_WIDTH 3840 54 #define SUNXI_DRM_MAX_HEIGHT 2160 55 56 static TAILQ_HEAD(, sunxi_drm_endpoint) sunxi_drm_endpoints = 57 TAILQ_HEAD_INITIALIZER(sunxi_drm_endpoints); 58 59 static const char * const compatible[] = { 60 "allwinner,sun8i-h3-display-engine", 61 "allwinner,sun50i-a64-display-engine", 62 NULL 63 }; 64 65 static const char * fb_compatible[] = { 66 "allwinner,simple-framebuffer", 67 NULL 68 }; 69 70 static int sunxi_drm_match(device_t, cfdata_t, void *); 71 static void sunxi_drm_attach(device_t, device_t, void *); 72 73 static void sunxi_drm_init(device_t); 74 static vmem_t *sunxi_drm_alloc_cma_pool(struct drm_device *, size_t); 75 76 static int sunxi_drm_set_busid(struct drm_device *, struct drm_master *); 77 78 static uint32_t sunxi_drm_get_vblank_counter(struct drm_device *, unsigned int); 79 static int sunxi_drm_enable_vblank(struct drm_device *, unsigned int); 80 static void sunxi_drm_disable_vblank(struct drm_device *, unsigned int); 81 82 static int sunxi_drm_load(struct drm_device *, unsigned long); 83 static int sunxi_drm_unload(struct drm_device *); 84 85 static struct drm_driver sunxi_drm_driver = { 86 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, 87 .dev_priv_size = 0, 88 .load = sunxi_drm_load, 89 .unload = sunxi_drm_unload, 90 91 .gem_free_object = drm_gem_cma_free_object, 92 .mmap_object = drm_gem_or_legacy_mmap_object, 93 .gem_uvm_ops = &drm_gem_cma_uvm_ops, 94 95 .dumb_create = drm_gem_cma_dumb_create, 96 .dumb_map_offset = drm_gem_cma_dumb_map_offset, 97 .dumb_destroy = drm_gem_dumb_destroy, 98 99 .get_vblank_counter = sunxi_drm_get_vblank_counter, 100 .enable_vblank = sunxi_drm_enable_vblank, 101 .disable_vblank = sunxi_drm_disable_vblank, 102 103 .name = DRIVER_NAME, 104 .desc = DRIVER_DESC, 105 .date = DRIVER_DATE, 106 .major = DRIVER_MAJOR, 107 .minor = DRIVER_MINOR, 108 .patchlevel = DRIVER_PATCHLEVEL, 109 110 .set_busid = sunxi_drm_set_busid, 111 }; 112 113 CFATTACH_DECL_NEW(sunxi_drm, sizeof(struct sunxi_drm_softc), 114 sunxi_drm_match, sunxi_drm_attach, NULL, NULL); 115 116 static int 117 sunxi_drm_match(device_t parent, cfdata_t cf, void *aux) 118 { 119 struct fdt_attach_args * const faa = aux; 120 121 return of_match_compatible(faa->faa_phandle, compatible); 122 } 123 124 static void 125 sunxi_drm_attach(device_t parent, device_t self, void *aux) 126 { 127 struct sunxi_drm_softc * const sc = device_private(self); 128 struct fdt_attach_args * const faa = aux; 129 struct drm_driver * const driver = &sunxi_drm_driver; 130 prop_dictionary_t dict = device_properties(self); 131 bool is_disabled; 132 133 sc->sc_dev = self; 134 sc->sc_dmat = faa->faa_dmat; 135 sc->sc_bst = faa->faa_bst; 136 sc->sc_phandle = faa->faa_phandle; 137 138 aprint_naive("\n"); 139 140 if (prop_dictionary_get_bool(dict, "disabled", &is_disabled) && is_disabled) { 141 aprint_normal(": Display Engine Pipeline (disabled)\n"); 142 return; 143 } 144 145 aprint_normal(": Display Engine Pipeline\n"); 146 147 sc->sc_ddev = drm_dev_alloc(driver, sc->sc_dev); 148 if (sc->sc_ddev == NULL) { 149 aprint_error_dev(self, "couldn't allocate DRM device\n"); 150 return; 151 } 152 sc->sc_ddev->dev_private = sc; 153 sc->sc_ddev->bst = sc->sc_bst; 154 sc->sc_ddev->bus_dmat = sc->sc_dmat; 155 sc->sc_ddev->dmat = sc->sc_ddev->bus_dmat; 156 sc->sc_ddev->dmat_subregion_p = false; 157 158 fdt_remove_bycompat(fb_compatible); 159 160 config_defer(self, sunxi_drm_init); 161 } 162 163 static void 164 sunxi_drm_init(device_t dev) 165 { 166 struct sunxi_drm_softc * const sc = device_private(dev); 167 struct drm_driver * const driver = &sunxi_drm_driver; 168 int error; 169 170 error = -drm_dev_register(sc->sc_ddev, 0); 171 if (error) { 172 drm_dev_unref(sc->sc_ddev); 173 aprint_error_dev(dev, "couldn't register DRM device: %d\n", 174 error); 175 return; 176 } 177 178 aprint_normal_dev(dev, "initialized %s %d.%d.%d %s on minor %d\n", 179 driver->name, driver->major, driver->minor, driver->patchlevel, 180 driver->date, sc->sc_ddev->primary->index); 181 } 182 183 static vmem_t * 184 sunxi_drm_alloc_cma_pool(struct drm_device *ddev, size_t cma_size) 185 { 186 struct sunxi_drm_softc * const sc = sunxi_drm_private(ddev); 187 bus_dma_segment_t segs[1]; 188 int nsegs; 189 int error; 190 191 error = bus_dmamem_alloc(sc->sc_dmat, cma_size, PAGE_SIZE, 0, 192 segs, 1, &nsegs, BUS_DMA_NOWAIT); 193 if (error) { 194 aprint_error_dev(sc->sc_dev, "couldn't allocate CMA pool\n"); 195 return NULL; 196 } 197 198 return vmem_create("sunxidrm", segs[0].ds_addr, segs[0].ds_len, 199 PAGE_SIZE, NULL, NULL, NULL, 0, VM_SLEEP, IPL_NONE); 200 } 201 202 static int 203 sunxi_drm_set_busid(struct drm_device *ddev, struct drm_master *master) 204 { 205 struct sunxi_drm_softc * const sc = sunxi_drm_private(ddev); 206 char id[32]; 207 208 snprintf(id, sizeof(id), "platform:sunxi:%u", device_unit(sc->sc_dev)); 209 210 master->unique = kzalloc(strlen(id) + 1, GFP_KERNEL); 211 if (master->unique == NULL) 212 return -ENOMEM; 213 strcpy(master->unique, id); 214 master->unique_len = strlen(master->unique); 215 216 return 0; 217 } 218 219 static int 220 sunxi_drm_fb_create_handle(struct drm_framebuffer *fb, 221 struct drm_file *file, unsigned int *handle) 222 { 223 struct sunxi_drm_framebuffer *sfb = to_sunxi_drm_framebuffer(fb); 224 225 return drm_gem_handle_create(file, &sfb->obj->base, handle); 226 } 227 228 static void 229 sunxi_drm_fb_destroy(struct drm_framebuffer *fb) 230 { 231 struct sunxi_drm_framebuffer *sfb = to_sunxi_drm_framebuffer(fb); 232 233 drm_framebuffer_cleanup(fb); 234 drm_gem_object_unreference_unlocked(&sfb->obj->base); 235 kmem_free(sfb, sizeof(*sfb)); 236 } 237 238 static const struct drm_framebuffer_funcs sunxi_drm_framebuffer_funcs = { 239 .create_handle = sunxi_drm_fb_create_handle, 240 .destroy = sunxi_drm_fb_destroy, 241 }; 242 243 static struct drm_framebuffer * 244 sunxi_drm_fb_create(struct drm_device *ddev, struct drm_file *file, 245 struct drm_mode_fb_cmd2 *cmd) 246 { 247 struct sunxi_drm_framebuffer *fb; 248 struct drm_gem_object *gem_obj; 249 int error; 250 251 if (cmd->flags) 252 return NULL; 253 254 gem_obj = drm_gem_object_lookup(ddev, file, cmd->handles[0]); 255 if (gem_obj == NULL) 256 return NULL; 257 258 fb = kmem_zalloc(sizeof(*fb), KM_SLEEP); 259 fb->obj = to_drm_gem_cma_obj(gem_obj); 260 fb->base.pitches[0] = cmd->pitches[0]; 261 fb->base.pitches[1] = cmd->pitches[1]; 262 fb->base.pitches[2] = cmd->pitches[2]; 263 fb->base.offsets[0] = cmd->offsets[0]; 264 fb->base.offsets[1] = cmd->offsets[2]; 265 fb->base.offsets[2] = cmd->offsets[1]; 266 fb->base.width = cmd->width; 267 fb->base.height = cmd->height; 268 fb->base.pixel_format = cmd->pixel_format; 269 fb->base.bits_per_pixel = drm_format_plane_cpp(fb->base.pixel_format, 0) * 8; 270 271 switch (fb->base.pixel_format) { 272 case DRM_FORMAT_XRGB8888: 273 case DRM_FORMAT_ARGB8888: 274 fb->base.depth = 32; 275 break; 276 default: 277 break; 278 } 279 280 error = drm_framebuffer_init(ddev, &fb->base, &sunxi_drm_framebuffer_funcs); 281 if (error != 0) 282 goto dealloc; 283 284 return &fb->base; 285 286 dealloc: 287 drm_framebuffer_cleanup(&fb->base); 288 kmem_free(fb, sizeof(*fb)); 289 drm_gem_object_unreference_unlocked(gem_obj); 290 291 return NULL; 292 } 293 294 static struct drm_mode_config_funcs sunxi_drm_mode_config_funcs = { 295 .fb_create = sunxi_drm_fb_create, 296 }; 297 298 static int 299 sunxi_drm_simplefb_lookup(bus_addr_t *paddr, bus_size_t *psize) 300 { 301 static const char * compat[] = { "simple-framebuffer", NULL }; 302 int chosen, child; 303 304 chosen = OF_finddevice("/chosen"); 305 if (chosen == -1) 306 return ENOENT; 307 308 for (child = OF_child(chosen); child; child = OF_peer(child)) { 309 if (!fdtbus_status_okay(child)) 310 continue; 311 if (!of_match_compatible(child, compat)) 312 continue; 313 return fdtbus_get_reg(child, 0, paddr, psize); 314 } 315 316 return ENOENT; 317 } 318 319 static int 320 sunxi_drm_fb_probe(struct drm_fb_helper *helper, struct drm_fb_helper_surface_size *sizes) 321 { 322 struct sunxi_drm_softc * const sc = sunxi_drm_private(helper->dev); 323 struct drm_device *ddev = helper->dev; 324 struct sunxi_drm_framebuffer *sfb = to_sunxi_drm_framebuffer(helper->fb); 325 struct drm_framebuffer *fb = helper->fb; 326 struct sunxi_drmfb_attach_args sfa; 327 bus_addr_t sfb_addr; 328 bus_size_t sfb_size; 329 size_t cma_size; 330 int error; 331 332 const u_int width = sizes->surface_width; 333 const u_int height = sizes->surface_height; 334 const u_int pitch = width * (32 / 8); 335 336 const size_t size = roundup(height * pitch, PAGE_SIZE); 337 338 if (sunxi_drm_simplefb_lookup(&sfb_addr, &sfb_size) != 0) 339 sfb_size = 0; 340 341 /* Reserve enough memory for a 4K plane, rounded to 1MB */ 342 cma_size = (SUNXI_DRM_MAX_WIDTH * SUNXI_DRM_MAX_HEIGHT * 4); 343 if (sfb_size == 0) { 344 /* Add memory for FB console if we cannot reclaim bootloader memory */ 345 cma_size += size; 346 } 347 cma_size = roundup(cma_size, 1024 * 1024); 348 sc->sc_ddev->cma_pool = sunxi_drm_alloc_cma_pool(sc->sc_ddev, cma_size); 349 if (sc->sc_ddev->cma_pool != NULL) { 350 if (sfb_size != 0) { 351 error = vmem_add(sc->sc_ddev->cma_pool, sfb_addr, 352 sfb_size, VM_SLEEP); 353 if (error != 0) 354 sfb_size = 0; 355 } 356 aprint_normal_dev(sc->sc_dev, "reserved %u MB DRAM for CMA", 357 (u_int)((cma_size + sfb_size) / (1024 * 1024))); 358 if (sfb_size != 0) 359 aprint_normal(" (%u MB reclaimed from bootloader)", 360 (u_int)(sfb_size / (1024 * 1024))); 361 aprint_normal("\n"); 362 } 363 364 sfb->obj = drm_gem_cma_create(ddev, size); 365 if (sfb->obj == NULL) { 366 DRM_ERROR("failed to allocate memory for framebuffer\n"); 367 return -ENOMEM; 368 } 369 370 fb->pitches[0] = pitch; 371 fb->offsets[0] = 0; 372 fb->width = width; 373 fb->height = height; 374 fb->pixel_format = DRM_FORMAT_XRGB8888; 375 drm_fb_get_bpp_depth(fb->pixel_format, &fb->depth, &fb->bits_per_pixel); 376 377 error = drm_framebuffer_init(ddev, fb, &sunxi_drm_framebuffer_funcs); 378 if (error != 0) { 379 DRM_ERROR("failed to initialize framebuffer\n"); 380 return error; 381 } 382 383 memset(&sfa, 0, sizeof(sfa)); 384 sfa.sfa_drm_dev = ddev; 385 sfa.sfa_fb_helper = helper; 386 sfa.sfa_fb_sizes = *sizes; 387 sfa.sfa_fb_bst = sc->sc_bst; 388 sfa.sfa_fb_dmat = sc->sc_dmat; 389 sfa.sfa_fb_linebytes = helper->fb->pitches[0]; 390 391 helper->fbdev = config_found_ia(ddev->dev, "sunxifbbus", &sfa, NULL); 392 if (helper->fbdev == NULL) { 393 DRM_ERROR("unable to attach framebuffer\n"); 394 return -ENXIO; 395 } 396 397 return 0; 398 } 399 400 static struct drm_fb_helper_funcs sunxi_drm_fb_helper_funcs = { 401 .fb_probe = sunxi_drm_fb_probe, 402 }; 403 404 static int 405 sunxi_drm_load(struct drm_device *ddev, unsigned long flags) 406 { 407 struct sunxi_drm_softc * const sc = sunxi_drm_private(ddev); 408 struct sunxi_drm_endpoint *sep; 409 struct sunxi_drm_fbdev *fbdev; 410 const u_int *data; 411 int datalen, error, num_crtc; 412 413 drm_mode_config_init(ddev); 414 ddev->mode_config.min_width = 0; 415 ddev->mode_config.min_height = 0; 416 ddev->mode_config.max_width = SUNXI_DRM_MAX_WIDTH; 417 ddev->mode_config.max_height = SUNXI_DRM_MAX_HEIGHT; 418 ddev->mode_config.funcs = &sunxi_drm_mode_config_funcs; 419 420 num_crtc = 0; 421 data = fdtbus_get_prop(sc->sc_phandle, "allwinner,pipelines", &datalen); 422 while (datalen >= 4) { 423 const int crtc_phandle = fdtbus_get_phandle_from_native(be32dec(data)); 424 425 TAILQ_FOREACH(sep, &sunxi_drm_endpoints, entries) 426 if (sep->phandle == crtc_phandle && sep->ddev == NULL) { 427 sep->ddev = ddev; 428 error = fdt_endpoint_activate_direct(sep->ep, true); 429 if (error != 0) { 430 aprint_error_dev(sc->sc_dev, "failed to activate endpoint: %d\n", 431 error); 432 } 433 if (fdt_endpoint_type(sep->ep) == EP_DRM_CRTC) 434 num_crtc++; 435 } 436 437 datalen -= 4; 438 data++; 439 } 440 441 if (num_crtc == 0) { 442 aprint_error_dev(sc->sc_dev, "no pipelines configured\n"); 443 error = ENXIO; 444 goto drmerr; 445 } 446 447 fbdev = kmem_zalloc(sizeof(*fbdev), KM_SLEEP); 448 449 drm_fb_helper_prepare(ddev, &fbdev->helper, &sunxi_drm_fb_helper_funcs); 450 451 error = drm_fb_helper_init(ddev, &fbdev->helper, num_crtc, num_crtc); 452 if (error) 453 goto allocerr; 454 455 fbdev->helper.fb = kmem_zalloc(sizeof(struct sunxi_drm_framebuffer), KM_SLEEP); 456 457 drm_fb_helper_single_add_all_connectors(&fbdev->helper); 458 459 drm_helper_disable_unused_functions(ddev); 460 461 drm_fb_helper_initial_config(&fbdev->helper, 32); 462 463 /* XXX */ 464 ddev->irq_enabled = true; 465 drm_vblank_init(ddev, num_crtc); 466 467 return 0; 468 469 allocerr: 470 kmem_free(fbdev, sizeof(*fbdev)); 471 drmerr: 472 drm_mode_config_cleanup(ddev); 473 474 return error; 475 } 476 477 static uint32_t 478 sunxi_drm_get_vblank_counter(struct drm_device *ddev, unsigned int crtc) 479 { 480 struct sunxi_drm_softc * const sc = sunxi_drm_private(ddev); 481 482 if (crtc >= __arraycount(sc->sc_vbl)) 483 return 0; 484 485 if (sc->sc_vbl[crtc].get_vblank_counter == NULL) 486 return 0; 487 488 return sc->sc_vbl[crtc].get_vblank_counter(sc->sc_vbl[crtc].priv); 489 } 490 491 static int 492 sunxi_drm_enable_vblank(struct drm_device *ddev, unsigned int crtc) 493 { 494 struct sunxi_drm_softc * const sc = sunxi_drm_private(ddev); 495 496 if (crtc >= __arraycount(sc->sc_vbl)) 497 return 0; 498 499 if (sc->sc_vbl[crtc].enable_vblank == NULL) 500 return 0; 501 502 sc->sc_vbl[crtc].enable_vblank(sc->sc_vbl[crtc].priv); 503 504 return 0; 505 } 506 507 static void 508 sunxi_drm_disable_vblank(struct drm_device *ddev, unsigned int crtc) 509 { 510 struct sunxi_drm_softc * const sc = sunxi_drm_private(ddev); 511 512 if (crtc >= __arraycount(sc->sc_vbl)) 513 return; 514 515 if (sc->sc_vbl[crtc].disable_vblank == NULL) 516 return; 517 518 sc->sc_vbl[crtc].disable_vblank(sc->sc_vbl[crtc].priv); 519 } 520 521 static int 522 sunxi_drm_unload(struct drm_device *ddev) 523 { 524 drm_mode_config_cleanup(ddev); 525 526 return 0; 527 } 528 529 int 530 sunxi_drm_register_endpoint(int phandle, struct fdt_endpoint *ep) 531 { 532 struct sunxi_drm_endpoint *sep; 533 534 sep = kmem_zalloc(sizeof(*sep), KM_SLEEP); 535 sep->phandle = phandle; 536 sep->ep = ep; 537 sep->ddev = NULL; 538 TAILQ_INSERT_TAIL(&sunxi_drm_endpoints, sep, entries); 539 540 return 0; 541 } 542 543 struct drm_device * 544 sunxi_drm_endpoint_device(struct fdt_endpoint *ep) 545 { 546 struct sunxi_drm_endpoint *sep; 547 548 TAILQ_FOREACH(sep, &sunxi_drm_endpoints, entries) 549 if (sep->ep == ep) 550 return sep->ddev; 551 552 return NULL; 553 } 554
Indexes created Thu Sep 25 08:09:54 GMT 2025