rk_drm.c revision 1.5.2.1
1 /* $NetBSD: rk_drm.c,v 1.5.2.1 2021/05/13 00:47:24 thorpej 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: rk_drm.c,v 1.5.2.1 2021/05/13 00:47:24 thorpej 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/rockchip/rk_drm.h> 52 53 #define RK_DRM_MAX_WIDTH 3840 54 #define RK_DRM_MAX_HEIGHT 2160 55 56 static TAILQ_HEAD(, rk_drm_ports) rk_drm_ports = 57 TAILQ_HEAD_INITIALIZER(rk_drm_ports); 58 59 static const struct device_compatible_entry compat_data[] = { 60 { .compat = "rockchip,display-subsystem" }, 61 DEVICE_COMPAT_EOL 62 }; 63 64 static const char * fb_compatible[] = { 65 "simple-framebuffer", 66 NULL 67 }; 68 69 static int rk_drm_match(device_t, cfdata_t, void *); 70 static void rk_drm_attach(device_t, device_t, void *); 71 72 static void rk_drm_init(device_t); 73 static vmem_t *rk_drm_alloc_cma_pool(struct drm_device *, size_t); 74 75 static int rk_drm_set_busid(struct drm_device *, struct drm_master *); 76 77 static uint32_t rk_drm_get_vblank_counter(struct drm_device *, unsigned int); 78 static int rk_drm_enable_vblank(struct drm_device *, unsigned int); 79 static void rk_drm_disable_vblank(struct drm_device *, unsigned int); 80 81 static int rk_drm_load(struct drm_device *, unsigned long); 82 static int rk_drm_unload(struct drm_device *); 83 84 static struct drm_driver rk_drm_driver = { 85 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, 86 .dev_priv_size = 0, 87 .load = rk_drm_load, 88 .unload = rk_drm_unload, 89 90 .gem_free_object = drm_gem_cma_free_object, 91 .mmap_object = drm_gem_or_legacy_mmap_object, 92 .gem_uvm_ops = &drm_gem_cma_uvm_ops, 93 94 .dumb_create = drm_gem_cma_dumb_create, 95 .dumb_map_offset = drm_gem_cma_dumb_map_offset, 96 .dumb_destroy = drm_gem_dumb_destroy, 97 98 .get_vblank_counter = rk_drm_get_vblank_counter, 99 .enable_vblank = rk_drm_enable_vblank, 100 .disable_vblank = rk_drm_disable_vblank, 101 102 .name = DRIVER_NAME, 103 .desc = DRIVER_DESC, 104 .date = DRIVER_DATE, 105 .major = DRIVER_MAJOR, 106 .minor = DRIVER_MINOR, 107 .patchlevel = DRIVER_PATCHLEVEL, 108 109 .set_busid = rk_drm_set_busid, 110 }; 111 112 CFATTACH_DECL_NEW(rk_drm, sizeof(struct rk_drm_softc), 113 rk_drm_match, rk_drm_attach, NULL, NULL); 114 115 static int 116 rk_drm_match(device_t parent, cfdata_t cf, void *aux) 117 { 118 struct fdt_attach_args * const faa = aux; 119 120 return of_compatible_match(faa->faa_phandle, compat_data); 121 } 122 123 static void 124 rk_drm_attach(device_t parent, device_t self, void *aux) 125 { 126 struct rk_drm_softc * const sc = device_private(self); 127 struct fdt_attach_args * const faa = aux; 128 struct drm_driver * const driver = &rk_drm_driver; 129 prop_dictionary_t dict = device_properties(self); 130 bool is_disabled; 131 132 sc->sc_dev = self; 133 sc->sc_dmat = faa->faa_dmat; 134 sc->sc_bst = faa->faa_bst; 135 sc->sc_phandle = faa->faa_phandle; 136 137 aprint_naive("\n"); 138 139 if (prop_dictionary_get_bool(dict, "disabled", &is_disabled) && is_disabled) { 140 aprint_normal(": (disabled)\n"); 141 return; 142 } 143 144 aprint_normal("\n"); 145 146 sc->sc_ddev = drm_dev_alloc(driver, sc->sc_dev); 147 if (sc->sc_ddev == NULL) { 148 aprint_error_dev(self, "couldn't allocate DRM device\n"); 149 return; 150 } 151 sc->sc_ddev->dev_private = sc; 152 sc->sc_ddev->bst = sc->sc_bst; 153 sc->sc_ddev->bus_dmat = sc->sc_dmat; 154 sc->sc_ddev->dmat = sc->sc_ddev->bus_dmat; 155 sc->sc_ddev->dmat_subregion_p = false; 156 157 fdt_remove_bycompat(fb_compatible); 158 159 config_defer(self, rk_drm_init); 160 } 161 162 static void 163 rk_drm_init(device_t dev) 164 { 165 struct rk_drm_softc * const sc = device_private(dev); 166 struct drm_driver * const driver = &rk_drm_driver; 167 int error; 168 169 error = -drm_dev_register(sc->sc_ddev, 0); 170 if (error) { 171 drm_dev_unref(sc->sc_ddev); 172 aprint_error_dev(dev, "couldn't register DRM device: %d\n", 173 error); 174 return; 175 } 176 177 aprint_normal_dev(dev, "initialized %s %d.%d.%d %s on minor %d\n", 178 driver->name, driver->major, driver->minor, driver->patchlevel, 179 driver->date, sc->sc_ddev->primary->index); 180 } 181 182 static vmem_t * 183 rk_drm_alloc_cma_pool(struct drm_device *ddev, size_t cma_size) 184 { 185 struct rk_drm_softc * const sc = rk_drm_private(ddev); 186 bus_dma_segment_t segs[1]; 187 int nsegs; 188 int error; 189 190 error = bus_dmamem_alloc(sc->sc_dmat, cma_size, PAGE_SIZE, 0, 191 segs, 1, &nsegs, BUS_DMA_NOWAIT); 192 if (error) { 193 aprint_error_dev(sc->sc_dev, "couldn't allocate CMA pool\n"); 194 return NULL; 195 } 196 197 return vmem_create("rkdrm", segs[0].ds_addr, segs[0].ds_len, 198 PAGE_SIZE, NULL, NULL, NULL, 0, VM_SLEEP, IPL_NONE); 199 } 200 201 static int 202 rk_drm_set_busid(struct drm_device *ddev, struct drm_master *master) 203 { 204 struct rk_drm_softc * const sc = rk_drm_private(ddev); 205 char id[32]; 206 207 snprintf(id, sizeof(id), "platform:rk:%u", device_unit(sc->sc_dev)); 208 209 master->unique = kzalloc(strlen(id) + 1, GFP_KERNEL); 210 if (master->unique == NULL) 211 return -ENOMEM; 212 strcpy(master->unique, id); 213 master->unique_len = strlen(master->unique); 214 215 return 0; 216 } 217 218 static int 219 rk_drm_fb_create_handle(struct drm_framebuffer *fb, 220 struct drm_file *file, unsigned int *handle) 221 { 222 struct rk_drm_framebuffer *sfb = to_rk_drm_framebuffer(fb); 223 224 return drm_gem_handle_create(file, &sfb->obj->base, handle); 225 } 226 227 static void 228 rk_drm_fb_destroy(struct drm_framebuffer *fb) 229 { 230 struct rk_drm_framebuffer *sfb = to_rk_drm_framebuffer(fb); 231 232 drm_framebuffer_cleanup(fb); 233 drm_gem_object_unreference_unlocked(&sfb->obj->base); 234 kmem_free(sfb, sizeof(*sfb)); 235 } 236 237 static const struct drm_framebuffer_funcs rk_drm_framebuffer_funcs = { 238 .create_handle = rk_drm_fb_create_handle, 239 .destroy = rk_drm_fb_destroy, 240 }; 241 242 static struct drm_framebuffer * 243 rk_drm_fb_create(struct drm_device *ddev, struct drm_file *file, 244 struct drm_mode_fb_cmd2 *cmd) 245 { 246 struct rk_drm_framebuffer *fb; 247 struct drm_gem_object *gem_obj; 248 int error; 249 250 if (cmd->flags) 251 return NULL; 252 253 gem_obj = drm_gem_object_lookup(ddev, file, cmd->handles[0]); 254 if (gem_obj == NULL) 255 return NULL; 256 257 fb = kmem_zalloc(sizeof(*fb), KM_SLEEP); 258 fb->obj = to_drm_gem_cma_obj(gem_obj); 259 fb->base.pitches[0] = cmd->pitches[0]; 260 fb->base.pitches[1] = cmd->pitches[1]; 261 fb->base.pitches[2] = cmd->pitches[2]; 262 fb->base.offsets[0] = cmd->offsets[0]; 263 fb->base.offsets[1] = cmd->offsets[2]; 264 fb->base.offsets[2] = cmd->offsets[1]; 265 fb->base.width = cmd->width; 266 fb->base.height = cmd->height; 267 fb->base.pixel_format = cmd->pixel_format; 268 fb->base.bits_per_pixel = drm_format_plane_cpp(fb->base.pixel_format, 0) * 8; 269 270 switch (fb->base.pixel_format) { 271 case DRM_FORMAT_XRGB8888: 272 case DRM_FORMAT_ARGB8888: 273 fb->base.depth = 32; 274 break; 275 default: 276 break; 277 } 278 279 error = drm_framebuffer_init(ddev, &fb->base, &rk_drm_framebuffer_funcs); 280 if (error != 0) 281 goto dealloc; 282 283 return &fb->base; 284 285 dealloc: 286 drm_framebuffer_cleanup(&fb->base); 287 kmem_free(fb, sizeof(*fb)); 288 drm_gem_object_unreference_unlocked(gem_obj); 289 290 return NULL; 291 } 292 293 static struct drm_mode_config_funcs rk_drm_mode_config_funcs = { 294 .fb_create = rk_drm_fb_create, 295 }; 296 297 static int 298 rk_drm_fb_probe(struct drm_fb_helper *helper, struct drm_fb_helper_surface_size *sizes) 299 { 300 struct rk_drm_softc * const sc = rk_drm_private(helper->dev); 301 struct drm_device *ddev = helper->dev; 302 struct rk_drm_framebuffer *sfb = to_rk_drm_framebuffer(helper->fb); 303 struct drm_framebuffer *fb = helper->fb; 304 struct rk_drmfb_attach_args sfa; 305 size_t cma_size; 306 int error; 307 308 const u_int width = sizes->surface_width; 309 const u_int height = sizes->surface_height; 310 const u_int pitch = width * (32 / 8); 311 312 const size_t size = roundup(height * pitch, PAGE_SIZE); 313 314 /* Reserve enough memory for the FB console plus a 4K plane, rounded to 1MB */ 315 cma_size = size; 316 cma_size += (RK_DRM_MAX_WIDTH * RK_DRM_MAX_HEIGHT * 4); 317 cma_size = roundup(cma_size, 1024 * 1024); 318 sc->sc_ddev->cma_pool = rk_drm_alloc_cma_pool(sc->sc_ddev, cma_size); 319 if (sc->sc_ddev->cma_pool != NULL) 320 aprint_normal_dev(sc->sc_dev, "reserved %u MB DRAM for CMA\n", 321 (u_int)(cma_size / (1024 * 1024))); 322 323 sfb->obj = drm_gem_cma_create(ddev, size); 324 if (sfb->obj == NULL) { 325 DRM_ERROR("failed to allocate memory for framebuffer\n"); 326 return -ENOMEM; 327 } 328 329 fb->pitches[0] = pitch; 330 fb->offsets[0] = 0; 331 fb->width = width; 332 fb->height = height; 333 #ifdef __ARM_BIG_ENDIAN 334 fb->pixel_format = DRM_FORMAT_BGRX8888; 335 #else 336 fb->pixel_format = DRM_FORMAT_XRGB8888; 337 #endif 338 drm_fb_get_bpp_depth(fb->pixel_format, &fb->depth, &fb->bits_per_pixel); 339 340 error = drm_framebuffer_init(ddev, fb, &rk_drm_framebuffer_funcs); 341 if (error != 0) { 342 DRM_ERROR("failed to initialize framebuffer\n"); 343 return error; 344 } 345 346 memset(&sfa, 0, sizeof(sfa)); 347 sfa.sfa_drm_dev = ddev; 348 sfa.sfa_fb_helper = helper; 349 sfa.sfa_fb_sizes = *sizes; 350 sfa.sfa_fb_bst = sc->sc_bst; 351 sfa.sfa_fb_dmat = sc->sc_dmat; 352 sfa.sfa_fb_linebytes = helper->fb->pitches[0]; 353 354 helper->fbdev = config_found(ddev->dev, &sfa, NULL, 355 CFARG_IATTR, "rkfbbus", 356 CFARG_EOL); 357 if (helper->fbdev == NULL) { 358 DRM_ERROR("unable to attach framebuffer\n"); 359 return -ENXIO; 360 } 361 362 return 0; 363 } 364 365 static struct drm_fb_helper_funcs rk_drm_fb_helper_funcs = { 366 .fb_probe = rk_drm_fb_probe, 367 }; 368 369 static int 370 rk_drm_load(struct drm_device *ddev, unsigned long flags) 371 { 372 struct rk_drm_softc * const sc = rk_drm_private(ddev); 373 struct rk_drm_ports *sport; 374 struct rk_drm_fbdev *fbdev; 375 struct fdt_endpoint *ep; 376 const u_int *data; 377 int datalen, error, num_crtc, ep_index; 378 379 drm_mode_config_init(ddev); 380 ddev->mode_config.min_width = 0; 381 ddev->mode_config.min_height = 0; 382 ddev->mode_config.max_width = RK_DRM_MAX_WIDTH; 383 ddev->mode_config.max_height = RK_DRM_MAX_HEIGHT; 384 ddev->mode_config.funcs = &rk_drm_mode_config_funcs; 385 386 num_crtc = 0; 387 data = fdtbus_get_prop(sc->sc_phandle, "ports", &datalen); 388 while (datalen >= 4) { 389 const int crtc_phandle = fdtbus_get_phandle_from_native(be32dec(data)); 390 391 TAILQ_FOREACH(sport, &rk_drm_ports, entries) 392 if (sport->phandle == crtc_phandle && sport->ddev == NULL) { 393 sport->ddev = ddev; 394 for (ep_index = 0; (ep = fdt_endpoint_get_from_index(sport->port, 0, ep_index)) != NULL; ep_index++) { 395 error = fdt_endpoint_activate_direct(ep, true); 396 if (error != 0) 397 aprint_debug_dev(sc->sc_dev, 398 "failed to activate endpoint %d: %d\n", 399 ep_index, error); 400 } 401 num_crtc++; 402 } 403 404 datalen -= 4; 405 data++; 406 } 407 408 if (num_crtc == 0) { 409 aprint_error_dev(sc->sc_dev, "no display interface ports configured\n"); 410 error = ENXIO; 411 goto drmerr; 412 } 413 414 fbdev = kmem_zalloc(sizeof(*fbdev), KM_SLEEP); 415 416 drm_fb_helper_prepare(ddev, &fbdev->helper, &rk_drm_fb_helper_funcs); 417 418 error = drm_fb_helper_init(ddev, &fbdev->helper, num_crtc, num_crtc); 419 if (error) 420 goto allocerr; 421 422 fbdev->helper.fb = kmem_zalloc(sizeof(struct rk_drm_framebuffer), KM_SLEEP); 423 424 drm_fb_helper_single_add_all_connectors(&fbdev->helper); 425 426 drm_helper_disable_unused_functions(ddev); 427 428 drm_fb_helper_initial_config(&fbdev->helper, 32); 429 430 /* XXX */ 431 ddev->irq_enabled = true; 432 drm_vblank_init(ddev, num_crtc); 433 434 return 0; 435 436 allocerr: 437 kmem_free(fbdev, sizeof(*fbdev)); 438 drmerr: 439 drm_mode_config_cleanup(ddev); 440 441 return error; 442 } 443 444 static uint32_t 445 rk_drm_get_vblank_counter(struct drm_device *ddev, unsigned int crtc) 446 { 447 struct rk_drm_softc * const sc = rk_drm_private(ddev); 448 449 if (crtc >= __arraycount(sc->sc_vbl)) 450 return 0; 451 452 if (sc->sc_vbl[crtc].get_vblank_counter == NULL) 453 return 0; 454 455 return sc->sc_vbl[crtc].get_vblank_counter(sc->sc_vbl[crtc].priv); 456 } 457 458 static int 459 rk_drm_enable_vblank(struct drm_device *ddev, unsigned int crtc) 460 { 461 struct rk_drm_softc * const sc = rk_drm_private(ddev); 462 463 if (crtc >= __arraycount(sc->sc_vbl)) 464 return 0; 465 466 if (sc->sc_vbl[crtc].enable_vblank == NULL) 467 return 0; 468 469 sc->sc_vbl[crtc].enable_vblank(sc->sc_vbl[crtc].priv); 470 471 return 0; 472 } 473 474 static void 475 rk_drm_disable_vblank(struct drm_device *ddev, unsigned int crtc) 476 { 477 struct rk_drm_softc * const sc = rk_drm_private(ddev); 478 479 if (crtc >= __arraycount(sc->sc_vbl)) 480 return; 481 482 if (sc->sc_vbl[crtc].disable_vblank == NULL) 483 return; 484 485 sc->sc_vbl[crtc].disable_vblank(sc->sc_vbl[crtc].priv); 486 } 487 488 static int 489 rk_drm_unload(struct drm_device *ddev) 490 { 491 drm_mode_config_cleanup(ddev); 492 493 return 0; 494 } 495 496 int 497 rk_drm_register_port(int phandle, struct fdt_device_ports *port) 498 { 499 struct rk_drm_ports *sport; 500 501 sport = kmem_zalloc(sizeof(*sport), KM_SLEEP); 502 sport->phandle = phandle; 503 sport->port = port; 504 sport->ddev = NULL; 505 TAILQ_INSERT_TAIL(&rk_drm_ports, sport, entries); 506 507 return 0; 508 } 509 510 struct drm_device * 511 rk_drm_port_device(struct fdt_device_ports *port) 512 { 513 struct rk_drm_ports *sport; 514 515 TAILQ_FOREACH(sport, &rk_drm_ports, entries) 516 if (sport->port == port) 517 return sport->ddev; 518 519 return NULL; 520 } 521
Indexes created Sun Oct 19 02:09:48 GMT 2025