1 /* 2 * (C) COPYRIGHT 2016 ARM Limited. All rights reserved. 3 * Author: Liviu Dudau <Liviu.Dudau@arm.com> 4 * 5 * This program is free software and is provided to you under the terms of the 6 * GNU General Public License version 2 as published by the Free Software 7 * Foundation, and any use by you of this program is subject to the terms 8 * of such GNU licence. 9 * 10 * ARM Mali DP500/DP550/DP650 KMS/DRM driver 11 */ 12 13 #include <linux/module.h> 14 #include <linux/clk.h> 15 #include <linux/component.h> 16 #include <linux/console.h> 17 #include <linux/of_device.h> 18 #include <linux/of_graph.h> 19 #include <linux/of_reserved_mem.h> 20 #include <linux/pm_runtime.h> 21 22 #include <drm/drmP.h> 23 #include <drm/drm_atomic.h> 24 #include <drm/drm_atomic_helper.h> 25 #include <drm/drm_crtc.h> 26 #include <drm/drm_crtc_helper.h> 27 #include <drm/drm_fb_cma_helper.h> 28 #include <drm/drm_gem_cma_helper.h> 29 #include <drm/drm_gem_framebuffer_helper.h> 30 #include <drm/drm_of.h> 31 32 #include "malidp_drv.h" 33 #include "malidp_regs.h" 34 #include "malidp_hw.h" 35 36 #define MALIDP_CONF_VALID_TIMEOUT 250 37 38 static void malidp_write_gamma_table(struct malidp_hw_device *hwdev, 39 u32 data[MALIDP_COEFFTAB_NUM_COEFFS]) 40 { 41 int i; 42 /* Update all channels with a single gamma curve. */ 43 const u32 gamma_write_mask = GENMASK(18, 16); 44 /* 45 * Always write an entire table, so the address field in 46 * DE_COEFFTAB_ADDR is 0 and we can use the gamma_write_mask bitmask 47 * directly. 48 */ 49 malidp_hw_write(hwdev, gamma_write_mask, 50 hwdev->hw->map.coeffs_base + MALIDP_COEF_TABLE_ADDR); 51 for (i = 0; i < MALIDP_COEFFTAB_NUM_COEFFS; ++i) 52 malidp_hw_write(hwdev, data[i], 53 hwdev->hw->map.coeffs_base + 54 MALIDP_COEF_TABLE_DATA); 55 } 56 57 static void malidp_atomic_commit_update_gamma(struct drm_crtc *crtc, 58 struct drm_crtc_state *old_state) 59 { 60 struct malidp_drm *malidp = crtc_to_malidp_device(crtc); 61 struct malidp_hw_device *hwdev = malidp->dev; 62 63 if (!crtc->state->color_mgmt_changed) 64 return; 65 66 if (!crtc->state->gamma_lut) { 67 malidp_hw_clearbits(hwdev, 68 MALIDP_DISP_FUNC_GAMMA, 69 MALIDP_DE_DISPLAY_FUNC); 70 } else { 71 struct malidp_crtc_state *mc = 72 to_malidp_crtc_state(crtc->state); 73 74 if (!old_state->gamma_lut || (crtc->state->gamma_lut->base.id != 75 old_state->gamma_lut->base.id)) 76 malidp_write_gamma_table(hwdev, mc->gamma_coeffs); 77 78 malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_GAMMA, 79 MALIDP_DE_DISPLAY_FUNC); 80 } 81 } 82 83 static 84 void malidp_atomic_commit_update_coloradj(struct drm_crtc *crtc, 85 struct drm_crtc_state *old_state) 86 { 87 struct malidp_drm *malidp = crtc_to_malidp_device(crtc); 88 struct malidp_hw_device *hwdev = malidp->dev; 89 int i; 90 91 if (!crtc->state->color_mgmt_changed) 92 return; 93 94 if (!crtc->state->ctm) { 95 malidp_hw_clearbits(hwdev, MALIDP_DISP_FUNC_CADJ, 96 MALIDP_DE_DISPLAY_FUNC); 97 } else { 98 struct malidp_crtc_state *mc = 99 to_malidp_crtc_state(crtc->state); 100 101 if (!old_state->ctm || (crtc->state->ctm->base.id != 102 old_state->ctm->base.id)) 103 for (i = 0; i < MALIDP_COLORADJ_NUM_COEFFS; ++i) 104 malidp_hw_write(hwdev, 105 mc->coloradj_coeffs[i], 106 hwdev->hw->map.coeffs_base + 107 MALIDP_COLOR_ADJ_COEF + 4 * i); 108 109 malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_CADJ, 110 MALIDP_DE_DISPLAY_FUNC); 111 } 112 } 113 114 static void malidp_atomic_commit_se_config(struct drm_crtc *crtc, 115 struct drm_crtc_state *old_state) 116 { 117 struct malidp_crtc_state *cs = to_malidp_crtc_state(crtc->state); 118 struct malidp_crtc_state *old_cs = to_malidp_crtc_state(old_state); 119 struct malidp_drm *malidp = crtc_to_malidp_device(crtc); 120 struct malidp_hw_device *hwdev = malidp->dev; 121 struct malidp_se_config *s = &cs->scaler_config; 122 struct malidp_se_config *old_s = &old_cs->scaler_config; 123 u32 se_control = hwdev->hw->map.se_base + 124 ((hwdev->hw->map.features & MALIDP_REGMAP_HAS_CLEARIRQ) ? 125 0x10 : 0xC); 126 u32 layer_control = se_control + MALIDP_SE_LAYER_CONTROL; 127 u32 scr = se_control + MALIDP_SE_SCALING_CONTROL; 128 u32 val; 129 130 /* Set SE_CONTROL */ 131 if (!s->scale_enable) { 132 val = malidp_hw_read(hwdev, se_control); 133 val &= ~MALIDP_SE_SCALING_EN; 134 malidp_hw_write(hwdev, val, se_control); 135 return; 136 } 137 138 hwdev->hw->se_set_scaling_coeffs(hwdev, s, old_s); 139 val = malidp_hw_read(hwdev, se_control); 140 val |= MALIDP_SE_SCALING_EN | MALIDP_SE_ALPHA_EN; 141 142 val &= ~MALIDP_SE_ENH(MALIDP_SE_ENH_MASK); 143 val |= s->enhancer_enable ? MALIDP_SE_ENH(3) : 0; 144 145 val |= MALIDP_SE_RGBO_IF_EN; 146 malidp_hw_write(hwdev, val, se_control); 147 148 /* Set IN_SIZE & OUT_SIZE. */ 149 val = MALIDP_SE_SET_V_SIZE(s->input_h) | 150 MALIDP_SE_SET_H_SIZE(s->input_w); 151 malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_IN_SIZE); 152 val = MALIDP_SE_SET_V_SIZE(s->output_h) | 153 MALIDP_SE_SET_H_SIZE(s->output_w); 154 malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_OUT_SIZE); 155 156 /* Set phase regs. */ 157 malidp_hw_write(hwdev, s->h_init_phase, scr + MALIDP_SE_H_INIT_PH); 158 malidp_hw_write(hwdev, s->h_delta_phase, scr + MALIDP_SE_H_DELTA_PH); 159 malidp_hw_write(hwdev, s->v_init_phase, scr + MALIDP_SE_V_INIT_PH); 160 malidp_hw_write(hwdev, s->v_delta_phase, scr + MALIDP_SE_V_DELTA_PH); 161 } 162 163 /* 164 * set the "config valid" bit and wait until the hardware acts on it 165 */ 166 static int malidp_set_and_wait_config_valid(struct drm_device *drm) 167 { 168 struct malidp_drm *malidp = drm->dev_private; 169 struct malidp_hw_device *hwdev = malidp->dev; 170 int ret; 171 172 atomic_set(&malidp->config_valid, 0); 173 hwdev->hw->set_config_valid(hwdev); 174 /* don't wait for config_valid flag if we are in config mode */ 175 if (hwdev->hw->in_config_mode(hwdev)) 176 return 0; 177 178 ret = wait_event_interruptible_timeout(malidp->wq, 179 atomic_read(&malidp->config_valid) == 1, 180 msecs_to_jiffies(MALIDP_CONF_VALID_TIMEOUT)); 181 182 return (ret > 0) ? 0 : -ETIMEDOUT; 183 } 184 185 static void malidp_output_poll_changed(struct drm_device *drm) 186 { 187 struct malidp_drm *malidp = drm->dev_private; 188 189 drm_fbdev_cma_hotplug_event(malidp->fbdev); 190 } 191 192 static void malidp_atomic_commit_hw_done(struct drm_atomic_state *state) 193 { 194 struct drm_pending_vblank_event *event; 195 struct drm_device *drm = state->dev; 196 struct malidp_drm *malidp = drm->dev_private; 197 198 if (malidp->crtc.enabled) { 199 /* only set config_valid if the CRTC is enabled */ 200 if (malidp_set_and_wait_config_valid(drm)) 201 DRM_DEBUG_DRIVER("timed out waiting for updated configuration\n"); 202 } 203 204 event = malidp->crtc.state->event; 205 if (event) { 206 malidp->crtc.state->event = NULL; 207 208 spin_lock_irq(&drm->event_lock); 209 if (drm_crtc_vblank_get(&malidp->crtc) == 0) 210 drm_crtc_arm_vblank_event(&malidp->crtc, event); 211 else 212 drm_crtc_send_vblank_event(&malidp->crtc, event); 213 spin_unlock_irq(&drm->event_lock); 214 } 215 drm_atomic_helper_commit_hw_done(state); 216 } 217 218 static void malidp_atomic_commit_tail(struct drm_atomic_state *state) 219 { 220 struct drm_device *drm = state->dev; 221 struct drm_crtc *crtc; 222 struct drm_crtc_state *old_crtc_state; 223 int i; 224 225 pm_runtime_get_sync(drm->dev); 226 227 drm_atomic_helper_commit_modeset_disables(drm, state); 228 229 for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) { 230 malidp_atomic_commit_update_gamma(crtc, old_crtc_state); 231 malidp_atomic_commit_update_coloradj(crtc, old_crtc_state); 232 malidp_atomic_commit_se_config(crtc, old_crtc_state); 233 } 234 235 drm_atomic_helper_commit_planes(drm, state, 0); 236 237 drm_atomic_helper_commit_modeset_enables(drm, state); 238 239 malidp_atomic_commit_hw_done(state); 240 241 drm_atomic_helper_wait_for_vblanks(drm, state); 242 243 pm_runtime_put(drm->dev); 244 245 drm_atomic_helper_cleanup_planes(drm, state); 246 } 247 248 static const struct drm_mode_config_helper_funcs malidp_mode_config_helpers = { 249 .atomic_commit_tail = malidp_atomic_commit_tail, 250 }; 251 252 static const struct drm_mode_config_funcs malidp_mode_config_funcs = { 253 .fb_create = drm_gem_fb_create, 254 .output_poll_changed = malidp_output_poll_changed, 255 .atomic_check = drm_atomic_helper_check, 256 .atomic_commit = drm_atomic_helper_commit, 257 }; 258 259 static int malidp_init(struct drm_device *drm) 260 { 261 int ret; 262 struct malidp_drm *malidp = drm->dev_private; 263 struct malidp_hw_device *hwdev = malidp->dev; 264 265 drm_mode_config_init(drm); 266 267 drm->mode_config.min_width = hwdev->min_line_size; 268 drm->mode_config.min_height = hwdev->min_line_size; 269 drm->mode_config.max_width = hwdev->max_line_size; 270 drm->mode_config.max_height = hwdev->max_line_size; 271 drm->mode_config.funcs = &malidp_mode_config_funcs; 272 drm->mode_config.helper_private = &malidp_mode_config_helpers; 273 274 ret = malidp_crtc_init(drm); 275 if (ret) { 276 drm_mode_config_cleanup(drm); 277 return ret; 278 } 279 280 return 0; 281 } 282 283 static void malidp_fini(struct drm_device *drm) 284 { 285 malidp_de_planes_destroy(drm); 286 drm_mode_config_cleanup(drm); 287 } 288 289 static int malidp_irq_init(struct platform_device *pdev) 290 { 291 int irq_de, irq_se, ret = 0; 292 struct drm_device *drm = dev_get_drvdata(&pdev->dev); 293 294 /* fetch the interrupts from DT */ 295 irq_de = platform_get_irq_byname(pdev, "DE"); 296 if (irq_de < 0) { 297 DRM_ERROR("no 'DE' IRQ specified!\n"); 298 return irq_de; 299 } 300 irq_se = platform_get_irq_byname(pdev, "SE"); 301 if (irq_se < 0) { 302 DRM_ERROR("no 'SE' IRQ specified!\n"); 303 return irq_se; 304 } 305 306 ret = malidp_de_irq_init(drm, irq_de); 307 if (ret) 308 return ret; 309 310 ret = malidp_se_irq_init(drm, irq_se); 311 if (ret) { 312 malidp_de_irq_fini(drm); 313 return ret; 314 } 315 316 return 0; 317 } 318 319 static void malidp_lastclose(struct drm_device *drm) 320 { 321 struct malidp_drm *malidp = drm->dev_private; 322 323 drm_fbdev_cma_restore_mode(malidp->fbdev); 324 } 325 326 DEFINE_DRM_GEM_CMA_FOPS(fops); 327 328 static struct drm_driver malidp_driver = { 329 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC | 330 DRIVER_PRIME, 331 .lastclose = malidp_lastclose, 332 .gem_free_object_unlocked = drm_gem_cma_free_object, 333 .gem_vm_ops = &drm_gem_cma_vm_ops, 334 .dumb_create = drm_gem_cma_dumb_create, 335 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 336 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 337 .gem_prime_export = drm_gem_prime_export, 338 .gem_prime_import = drm_gem_prime_import, 339 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 340 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 341 .gem_prime_vmap = drm_gem_cma_prime_vmap, 342 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 343 .gem_prime_mmap = drm_gem_cma_prime_mmap, 344 .fops = &fops, 345 .name = "mali-dp", 346 .desc = "ARM Mali Display Processor driver", 347 .date = "20160106", 348 .major = 1, 349 .minor = 0, 350 }; 351 352 static const struct of_device_id malidp_drm_of_match[] = { 353 { 354 .compatible = "arm,mali-dp500", 355 .data = &malidp_device[MALIDP_500] 356 }, 357 { 358 .compatible = "arm,mali-dp550", 359 .data = &malidp_device[MALIDP_550] 360 }, 361 { 362 .compatible = "arm,mali-dp650", 363 .data = &malidp_device[MALIDP_650] 364 }, 365 {}, 366 }; 367 MODULE_DEVICE_TABLE(of, malidp_drm_of_match); 368 369 static bool malidp_is_compatible_hw_id(struct malidp_hw_device *hwdev, 370 const struct of_device_id *dev_id) 371 { 372 u32 core_id; 373 const char *compatstr_dp500 = "arm,mali-dp500"; 374 bool is_dp500; 375 bool dt_is_dp500; 376 377 /* 378 * The DP500 CORE_ID register is in a different location, so check it 379 * first. If the product id field matches, then this is DP500, otherwise 380 * check the DP550/650 CORE_ID register. 381 */ 382 core_id = malidp_hw_read(hwdev, MALIDP500_DC_BASE + MALIDP_DE_CORE_ID); 383 /* Offset 0x18 will never read 0x500 on products other than DP500. */ 384 is_dp500 = (MALIDP_PRODUCT_ID(core_id) == 0x500); 385 dt_is_dp500 = strnstr(dev_id->compatible, compatstr_dp500, 386 sizeof(dev_id->compatible)) != NULL; 387 if (is_dp500 != dt_is_dp500) { 388 DRM_ERROR("Device-tree expects %s, but hardware %s DP500.\n", 389 dev_id->compatible, is_dp500 ? "is" : "is not"); 390 return false; 391 } else if (!dt_is_dp500) { 392 u16 product_id; 393 char buf[32]; 394 395 core_id = malidp_hw_read(hwdev, 396 MALIDP550_DC_BASE + MALIDP_DE_CORE_ID); 397 product_id = MALIDP_PRODUCT_ID(core_id); 398 snprintf(buf, sizeof(buf), "arm,mali-dp%X", product_id); 399 if (!strnstr(dev_id->compatible, buf, 400 sizeof(dev_id->compatible))) { 401 DRM_ERROR("Device-tree expects %s, but hardware is DP%03X.\n", 402 dev_id->compatible, product_id); 403 return false; 404 } 405 } 406 return true; 407 } 408 409 static bool malidp_has_sufficient_address_space(const struct resource *res, 410 const struct of_device_id *dev_id) 411 { 412 resource_size_t res_size = resource_size(res); 413 const char *compatstr_dp500 = "arm,mali-dp500"; 414 415 if (!strnstr(dev_id->compatible, compatstr_dp500, 416 sizeof(dev_id->compatible))) 417 return res_size >= MALIDP550_ADDR_SPACE_SIZE; 418 else if (res_size < MALIDP500_ADDR_SPACE_SIZE) 419 return false; 420 return true; 421 } 422 423 static ssize_t core_id_show(struct device *dev, struct device_attribute *attr, 424 char *buf) 425 { 426 struct drm_device *drm = dev_get_drvdata(dev); 427 struct malidp_drm *malidp = drm->dev_private; 428 429 return snprintf(buf, PAGE_SIZE, "%08x\n", malidp->core_id); 430 } 431 432 DEVICE_ATTR_RO(core_id); 433 434 static int malidp_init_sysfs(struct device *dev) 435 { 436 int ret = device_create_file(dev, &dev_attr_core_id); 437 438 if (ret) 439 DRM_ERROR("failed to create device file for core_id\n"); 440 441 return ret; 442 } 443 444 static void malidp_fini_sysfs(struct device *dev) 445 { 446 device_remove_file(dev, &dev_attr_core_id); 447 } 448 449 #define MAX_OUTPUT_CHANNELS 3 450 451 static int malidp_runtime_pm_suspend(struct device *dev) 452 { 453 struct drm_device *drm = dev_get_drvdata(dev); 454 struct malidp_drm *malidp = drm->dev_private; 455 struct malidp_hw_device *hwdev = malidp->dev; 456 457 /* we can only suspend if the hardware is in config mode */ 458 WARN_ON(!hwdev->hw->in_config_mode(hwdev)); 459 460 hwdev->pm_suspended = true; 461 clk_disable_unprepare(hwdev->mclk); 462 clk_disable_unprepare(hwdev->aclk); 463 clk_disable_unprepare(hwdev->pclk); 464 465 return 0; 466 } 467 468 static int malidp_runtime_pm_resume(struct device *dev) 469 { 470 struct drm_device *drm = dev_get_drvdata(dev); 471 struct malidp_drm *malidp = drm->dev_private; 472 struct malidp_hw_device *hwdev = malidp->dev; 473 474 clk_prepare_enable(hwdev->pclk); 475 clk_prepare_enable(hwdev->aclk); 476 clk_prepare_enable(hwdev->mclk); 477 hwdev->pm_suspended = false; 478 479 return 0; 480 } 481 482 static int malidp_bind(struct device *dev) 483 { 484 struct resource *res; 485 struct drm_device *drm; 486 struct malidp_drm *malidp; 487 struct malidp_hw_device *hwdev; 488 struct platform_device *pdev = to_platform_device(dev); 489 struct of_device_id const *dev_id; 490 /* number of lines for the R, G and B output */ 491 u8 output_width[MAX_OUTPUT_CHANNELS]; 492 int ret = 0, i; 493 u32 version, out_depth = 0; 494 495 malidp = devm_kzalloc(dev, sizeof(*malidp), GFP_KERNEL); 496 if (!malidp) 497 return -ENOMEM; 498 499 hwdev = devm_kzalloc(dev, sizeof(*hwdev), GFP_KERNEL); 500 if (!hwdev) 501 return -ENOMEM; 502 503 hwdev->hw = (struct malidp_hw *)of_device_get_match_data(dev); 504 malidp->dev = hwdev; 505 506 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 507 hwdev->regs = devm_ioremap_resource(dev, res); 508 if (IS_ERR(hwdev->regs)) 509 return PTR_ERR(hwdev->regs); 510 511 hwdev->pclk = devm_clk_get(dev, "pclk"); 512 if (IS_ERR(hwdev->pclk)) 513 return PTR_ERR(hwdev->pclk); 514 515 hwdev->aclk = devm_clk_get(dev, "aclk"); 516 if (IS_ERR(hwdev->aclk)) 517 return PTR_ERR(hwdev->aclk); 518 519 hwdev->mclk = devm_clk_get(dev, "mclk"); 520 if (IS_ERR(hwdev->mclk)) 521 return PTR_ERR(hwdev->mclk); 522 523 hwdev->pxlclk = devm_clk_get(dev, "pxlclk"); 524 if (IS_ERR(hwdev->pxlclk)) 525 return PTR_ERR(hwdev->pxlclk); 526 527 /* Get the optional framebuffer memory resource */ 528 ret = of_reserved_mem_device_init(dev); 529 if (ret && ret != -ENODEV) 530 return ret; 531 532 drm = drm_dev_alloc(&malidp_driver, dev); 533 if (IS_ERR(drm)) { 534 ret = PTR_ERR(drm); 535 goto alloc_fail; 536 } 537 538 drm->dev_private = malidp; 539 dev_set_drvdata(dev, drm); 540 541 /* Enable power management */ 542 pm_runtime_enable(dev); 543 544 /* Resume device to enable the clocks */ 545 if (pm_runtime_enabled(dev)) 546 pm_runtime_get_sync(dev); 547 else 548 malidp_runtime_pm_resume(dev); 549 550 dev_id = of_match_device(malidp_drm_of_match, dev); 551 if (!dev_id) { 552 ret = -EINVAL; 553 goto query_hw_fail; 554 } 555 556 if (!malidp_has_sufficient_address_space(res, dev_id)) { 557 DRM_ERROR("Insufficient address space in device-tree.\n"); 558 ret = -EINVAL; 559 goto query_hw_fail; 560 } 561 562 if (!malidp_is_compatible_hw_id(hwdev, dev_id)) { 563 ret = -EINVAL; 564 goto query_hw_fail; 565 } 566 567 ret = hwdev->hw->query_hw(hwdev); 568 if (ret) { 569 DRM_ERROR("Invalid HW configuration\n"); 570 goto query_hw_fail; 571 } 572 573 version = malidp_hw_read(hwdev, hwdev->hw->map.dc_base + MALIDP_DE_CORE_ID); 574 DRM_INFO("found ARM Mali-DP%3x version r%dp%d\n", version >> 16, 575 (version >> 12) & 0xf, (version >> 8) & 0xf); 576 577 malidp->core_id = version; 578 579 /* set the number of lines used for output of RGB data */ 580 ret = of_property_read_u8_array(dev->of_node, 581 "arm,malidp-output-port-lines", 582 output_width, MAX_OUTPUT_CHANNELS); 583 if (ret) 584 goto query_hw_fail; 585 586 for (i = 0; i < MAX_OUTPUT_CHANNELS; i++) 587 out_depth = (out_depth << 8) | (output_width[i] & 0xf); 588 malidp_hw_write(hwdev, out_depth, hwdev->hw->map.out_depth_base); 589 590 atomic_set(&malidp->config_valid, 0); 591 init_waitqueue_head(&malidp->wq); 592 593 ret = malidp_init(drm); 594 if (ret < 0) 595 goto query_hw_fail; 596 597 ret = malidp_init_sysfs(dev); 598 if (ret) 599 goto init_fail; 600 601 /* Set the CRTC's port so that the encoder component can find it */ 602 malidp->crtc.port = of_graph_get_port_by_id(dev->of_node, 0); 603 604 ret = component_bind_all(dev, drm); 605 if (ret) { 606 DRM_ERROR("Failed to bind all components\n"); 607 goto bind_fail; 608 } 609 610 ret = malidp_irq_init(pdev); 611 if (ret < 0) 612 goto irq_init_fail; 613 614 drm->irq_enabled = true; 615 616 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 617 if (ret < 0) { 618 DRM_ERROR("failed to initialise vblank\n"); 619 goto vblank_fail; 620 } 621 pm_runtime_put(dev); 622 623 drm_mode_config_reset(drm); 624 625 malidp->fbdev = drm_fbdev_cma_init(drm, 32, 626 drm->mode_config.num_connector); 627 628 if (IS_ERR(malidp->fbdev)) { 629 ret = PTR_ERR(malidp->fbdev); 630 malidp->fbdev = NULL; 631 goto fbdev_fail; 632 } 633 634 drm_kms_helper_poll_init(drm); 635 636 ret = drm_dev_register(drm, 0); 637 if (ret) 638 goto register_fail; 639 640 return 0; 641 642 register_fail: 643 if (malidp->fbdev) { 644 drm_fbdev_cma_fini(malidp->fbdev); 645 malidp->fbdev = NULL; 646 } 647 drm_kms_helper_poll_fini(drm); 648 fbdev_fail: 649 pm_runtime_get_sync(dev); 650 vblank_fail: 651 malidp_se_irq_fini(drm); 652 malidp_de_irq_fini(drm); 653 drm->irq_enabled = false; 654 irq_init_fail: 655 component_unbind_all(dev, drm); 656 bind_fail: 657 of_node_put(malidp->crtc.port); 658 malidp->crtc.port = NULL; 659 init_fail: 660 malidp_fini_sysfs(dev); 661 malidp_fini(drm); 662 query_hw_fail: 663 pm_runtime_put(dev); 664 if (pm_runtime_enabled(dev)) 665 pm_runtime_disable(dev); 666 else 667 malidp_runtime_pm_suspend(dev); 668 drm->dev_private = NULL; 669 dev_set_drvdata(dev, NULL); 670 drm_dev_put(drm); 671 alloc_fail: 672 of_reserved_mem_device_release(dev); 673 674 return ret; 675 } 676 677 static void malidp_unbind(struct device *dev) 678 { 679 struct drm_device *drm = dev_get_drvdata(dev); 680 struct malidp_drm *malidp = drm->dev_private; 681 682 drm_dev_unregister(drm); 683 if (malidp->fbdev) { 684 drm_fbdev_cma_fini(malidp->fbdev); 685 malidp->fbdev = NULL; 686 } 687 drm_kms_helper_poll_fini(drm); 688 pm_runtime_get_sync(dev); 689 malidp_se_irq_fini(drm); 690 malidp_de_irq_fini(drm); 691 component_unbind_all(dev, drm); 692 of_node_put(malidp->crtc.port); 693 malidp->crtc.port = NULL; 694 malidp_fini_sysfs(dev); 695 malidp_fini(drm); 696 pm_runtime_put(dev); 697 if (pm_runtime_enabled(dev)) 698 pm_runtime_disable(dev); 699 else 700 malidp_runtime_pm_suspend(dev); 701 drm->dev_private = NULL; 702 dev_set_drvdata(dev, NULL); 703 drm_dev_put(drm); 704 of_reserved_mem_device_release(dev); 705 } 706 707 static const struct component_master_ops malidp_master_ops = { 708 .bind = malidp_bind, 709 .unbind = malidp_unbind, 710 }; 711 712 static int malidp_compare_dev(struct device *dev, void *data) 713 { 714 struct device_node *np = data; 715 716 return dev->of_node == np; 717 } 718 719 static int malidp_platform_probe(struct platform_device *pdev) 720 { 721 struct device_node *port; 722 struct component_match *match = NULL; 723 724 if (!pdev->dev.of_node) 725 return -ENODEV; 726 727 /* there is only one output port inside each device, find it */ 728 port = of_graph_get_remote_node(pdev->dev.of_node, 0, 0); 729 if (!port) 730 return -ENODEV; 731 732 drm_of_component_match_add(&pdev->dev, &match, malidp_compare_dev, 733 port); 734 of_node_put(port); 735 return component_master_add_with_match(&pdev->dev, &malidp_master_ops, 736 match); 737 } 738 739 static int malidp_platform_remove(struct platform_device *pdev) 740 { 741 component_master_del(&pdev->dev, &malidp_master_ops); 742 return 0; 743 } 744 745 static int __maybe_unused malidp_pm_suspend(struct device *dev) 746 { 747 struct drm_device *drm = dev_get_drvdata(dev); 748 struct malidp_drm *malidp = drm->dev_private; 749 750 drm_kms_helper_poll_disable(drm); 751 console_lock(); 752 drm_fbdev_cma_set_suspend(malidp->fbdev, 1); 753 console_unlock(); 754 malidp->pm_state = drm_atomic_helper_suspend(drm); 755 if (IS_ERR(malidp->pm_state)) { 756 console_lock(); 757 drm_fbdev_cma_set_suspend(malidp->fbdev, 0); 758 console_unlock(); 759 drm_kms_helper_poll_enable(drm); 760 return PTR_ERR(malidp->pm_state); 761 } 762 763 return 0; 764 } 765 766 static int __maybe_unused malidp_pm_resume(struct device *dev) 767 { 768 struct drm_device *drm = dev_get_drvdata(dev); 769 struct malidp_drm *malidp = drm->dev_private; 770 771 drm_atomic_helper_resume(drm, malidp->pm_state); 772 console_lock(); 773 drm_fbdev_cma_set_suspend(malidp->fbdev, 0); 774 console_unlock(); 775 drm_kms_helper_poll_enable(drm); 776 777 return 0; 778 } 779 780 static const struct dev_pm_ops malidp_pm_ops = { 781 SET_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend, malidp_pm_resume) \ 782 SET_RUNTIME_PM_OPS(malidp_runtime_pm_suspend, malidp_runtime_pm_resume, NULL) 783 }; 784 785 static struct platform_driver malidp_platform_driver = { 786 .probe = malidp_platform_probe, 787 .remove = malidp_platform_remove, 788 .driver = { 789 .name = "mali-dp", 790 .pm = &malidp_pm_ops, 791 .of_match_table = malidp_drm_of_match, 792 }, 793 }; 794 795 module_platform_driver(malidp_platform_driver); 796 797 MODULE_AUTHOR("Liviu Dudau <Liviu.Dudau@arm.com>"); 798 MODULE_DESCRIPTION("ARM Mali DP DRM driver"); 799 MODULE_LICENSE("GPL v2"); 800