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imx8m-blk-ctrl.c
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linux-6.19.14/drivers/pmdomain/imx/imx8m-blk-ctrl.c
1// SPDX-License-Identifier: GPL-2.0+ 2 3/* 4 * Copyright 2021 Pengutronix, Lucas Stach <kernel@pengutronix.de> 5 */ 6 7#include <linux/bitfield.h> 8#include <linux/device.h> 9#include <linux/interconnect.h> 10#include <linux/module.h> 11#include <linux/of.h> 12#include <linux/of_platform.h> 13#include <linux/platform_device.h> 14#include <linux/pm_domain.h> 15#include <linux/pm_runtime.h> 16#include <linux/regmap.h> 17#include <linux/clk.h> 18 19#include <dt-bindings/power/imx8mm-power.h> 20#include <dt-bindings/power/imx8mn-power.h> 21#include <dt-bindings/power/imx8mp-power.h> 22#include <dt-bindings/power/imx8mq-power.h> 23 24#define BLK_SFT_RSTN 0x0 25#define BLK_CLK_EN 0x4 26#define BLK_MIPI_RESET_DIV 0x8 /* Mini/Nano/Plus DISPLAY_BLK_CTRL only */ 27 28struct imx8m_blk_ctrl_domain; 29 30struct imx8m_blk_ctrl { 31 struct device *dev; 32 struct notifier_block power_nb; 33 struct device *bus_power_dev; 34 struct regmap *regmap; 35 struct imx8m_blk_ctrl_domain *domains; 36 struct genpd_onecell_data onecell_data; 37}; 38 39struct imx8m_blk_ctrl_domain_data { 40 const char *name; 41 const char * const *clk_names; 42 const char * const *path_names; 43 const char *gpc_name; 44 int num_clks; 45 int num_paths; 46 u32 rst_mask; 47 u32 clk_mask; 48 49 /* 50 * i.MX8M Mini, Nano and Plus have a third DISPLAY_BLK_CTRL register 51 * which is used to control the reset for the MIPI Phy. 52 * Since it's only present in certain circumstances, 53 * an if-statement should be used before setting and clearing this 54 * register. 55 */ 56 u32 mipi_phy_rst_mask; 57}; 58 59#define DOMAIN_MAX_CLKS 4 60#define DOMAIN_MAX_PATHS 4 61 62struct imx8m_blk_ctrl_domain { 63 struct generic_pm_domain genpd; 64 const struct imx8m_blk_ctrl_domain_data *data; 65 struct clk_bulk_data clks[DOMAIN_MAX_CLKS]; 66 struct icc_bulk_data paths[DOMAIN_MAX_PATHS]; 67 struct device *power_dev; 68 struct imx8m_blk_ctrl *bc; 69 int num_paths; 70}; 71 72struct imx8m_blk_ctrl_data { 73 int max_reg; 74 notifier_fn_t power_notifier_fn; 75 const struct imx8m_blk_ctrl_domain_data *domains; 76 int num_domains; 77}; 78 79static inline struct imx8m_blk_ctrl_domain * 80to_imx8m_blk_ctrl_domain(struct generic_pm_domain *genpd) 81{ 82 return container_of(genpd, struct imx8m_blk_ctrl_domain, genpd); 83} 84 85static int imx8m_blk_ctrl_power_on(struct generic_pm_domain *genpd) 86{ 87 struct imx8m_blk_ctrl_domain *domain = to_imx8m_blk_ctrl_domain(genpd); 88 const struct imx8m_blk_ctrl_domain_data *data = domain->data; 89 struct imx8m_blk_ctrl *bc = domain->bc; 90 int ret; 91 92 /* make sure bus domain is awake */ 93 ret = pm_runtime_get_sync(bc->bus_power_dev); 94 if (ret < 0) { 95 pm_runtime_put_noidle(bc->bus_power_dev); 96 dev_err(bc->dev, "failed to power up bus domain\n"); 97 return ret; 98 } 99 100 /* put devices into reset */ 101 regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask); 102 if (data->mipi_phy_rst_mask) 103 regmap_clear_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_phy_rst_mask); 104 105 /* enable upstream and blk-ctrl clocks to allow reset to propagate */ 106 ret = clk_bulk_prepare_enable(data->num_clks, domain->clks); 107 if (ret) { 108 dev_err(bc->dev, "failed to enable clocks\n"); 109 goto bus_put; 110 } 111 regmap_set_bits(bc->regmap, BLK_CLK_EN, data->clk_mask); 112 113 /* power up upstream GPC domain */ 114 ret = pm_runtime_get_sync(domain->power_dev); 115 if (ret < 0) { 116 dev_err(bc->dev, "failed to power up peripheral domain\n"); 117 goto clk_disable; 118 } 119 120 /* wait for reset to propagate */ 121 udelay(5); 122 123 /* release reset */ 124 regmap_set_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask); 125 if (data->mipi_phy_rst_mask) 126 regmap_set_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_phy_rst_mask); 127 128 ret = icc_bulk_set_bw(domain->num_paths, domain->paths); 129 if (ret) 130 dev_err(bc->dev, "failed to set icc bw\n"); 131 132 /* disable upstream clocks */ 133 clk_bulk_disable_unprepare(data->num_clks, domain->clks); 134 135 return 0; 136 137clk_disable: 138 clk_bulk_disable_unprepare(data->num_clks, domain->clks); 139bus_put: 140 pm_runtime_put(bc->bus_power_dev); 141 142 return ret; 143} 144 145static int imx8m_blk_ctrl_power_off(struct generic_pm_domain *genpd) 146{ 147 struct imx8m_blk_ctrl_domain *domain = to_imx8m_blk_ctrl_domain(genpd); 148 const struct imx8m_blk_ctrl_domain_data *data = domain->data; 149 struct imx8m_blk_ctrl *bc = domain->bc; 150 151 /* put devices into reset and disable clocks */ 152 if (data->mipi_phy_rst_mask) 153 regmap_clear_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_phy_rst_mask); 154 155 regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask); 156 regmap_clear_bits(bc->regmap, BLK_CLK_EN, data->clk_mask); 157 158 /* power down upstream GPC domain */ 159 pm_runtime_put(domain->power_dev); 160 161 /* allow bus domain to suspend */ 162 pm_runtime_put(bc->bus_power_dev); 163 164 return 0; 165} 166 167static struct lock_class_key blk_ctrl_genpd_lock_class; 168 169static int imx8m_blk_ctrl_probe(struct platform_device *pdev) 170{ 171 const struct imx8m_blk_ctrl_data *bc_data; 172 struct device *dev = &pdev->dev; 173 struct imx8m_blk_ctrl *bc; 174 void __iomem *base; 175 int i, ret; 176 177 struct regmap_config regmap_config = { 178 .reg_bits = 32, 179 .val_bits = 32, 180 .reg_stride = 4, 181 }; 182 183 bc = devm_kzalloc(dev, sizeof(*bc), GFP_KERNEL); 184 if (!bc) 185 return -ENOMEM; 186 187 bc->dev = dev; 188 189 bc_data = of_device_get_match_data(dev); 190 191 base = devm_platform_ioremap_resource(pdev, 0); 192 if (IS_ERR(base)) 193 return PTR_ERR(base); 194 195 regmap_config.max_register = bc_data->max_reg; 196 bc->regmap = devm_regmap_init_mmio(dev, base, ®map_config); 197 if (IS_ERR(bc->regmap)) 198 return dev_err_probe(dev, PTR_ERR(bc->regmap), 199 "failed to init regmap\n"); 200 201 bc->domains = devm_kcalloc(dev, bc_data->num_domains, 202 sizeof(struct imx8m_blk_ctrl_domain), 203 GFP_KERNEL); 204 if (!bc->domains) 205 return -ENOMEM; 206 207 bc->onecell_data.num_domains = bc_data->num_domains; 208 bc->onecell_data.domains = 209 devm_kcalloc(dev, bc_data->num_domains, 210 sizeof(struct generic_pm_domain *), GFP_KERNEL); 211 if (!bc->onecell_data.domains) 212 return -ENOMEM; 213 214 bc->bus_power_dev = dev_pm_domain_attach_by_name(dev, "bus"); 215 if (IS_ERR(bc->bus_power_dev)) { 216 if (PTR_ERR(bc->bus_power_dev) == -ENODEV) 217 return dev_err_probe(dev, -EPROBE_DEFER, 218 "failed to attach power domain \"bus\"\n"); 219 else 220 return dev_err_probe(dev, PTR_ERR(bc->bus_power_dev), 221 "failed to attach power domain \"bus\"\n"); 222 } 223 224 for (i = 0; i < bc_data->num_domains; i++) { 225 const struct imx8m_blk_ctrl_domain_data *data = &bc_data->domains[i]; 226 struct imx8m_blk_ctrl_domain *domain = &bc->domains[i]; 227 int j; 228 229 domain->data = data; 230 domain->num_paths = data->num_paths; 231 232 for (j = 0; j < data->num_clks; j++) 233 domain->clks[j].id = data->clk_names[j]; 234 235 for (j = 0; j < data->num_paths; j++) { 236 domain->paths[j].name = data->path_names[j]; 237 /* Fake value for now, just let ICC could configure NoC mode/priority */ 238 domain->paths[j].avg_bw = 1; 239 domain->paths[j].peak_bw = 1; 240 } 241 242 ret = devm_of_icc_bulk_get(dev, data->num_paths, domain->paths); 243 if (ret) { 244 if (ret != -EPROBE_DEFER) { 245 dev_warn_once(dev, "Could not get interconnect paths, NoC will stay unconfigured!\n"); 246 domain->num_paths = 0; 247 } else { 248 dev_err_probe(dev, ret, "failed to get noc entries\n"); 249 goto cleanup_pds; 250 } 251 } 252 253 ret = devm_clk_bulk_get(dev, data->num_clks, domain->clks); 254 if (ret) { 255 dev_err_probe(dev, ret, "failed to get clock\n"); 256 goto cleanup_pds; 257 } 258 259 domain->power_dev = 260 dev_pm_domain_attach_by_name(dev, data->gpc_name); 261 if (IS_ERR_OR_NULL(domain->power_dev)) { 262 if (!domain->power_dev) 263 ret = -ENODEV; 264 else 265 ret = PTR_ERR(domain->power_dev); 266 dev_err_probe(dev, ret, 267 "failed to attach power domain \"%s\"\n", 268 data->gpc_name); 269 goto cleanup_pds; 270 } 271 272 domain->genpd.name = data->name; 273 domain->genpd.power_on = imx8m_blk_ctrl_power_on; 274 domain->genpd.power_off = imx8m_blk_ctrl_power_off; 275 domain->bc = bc; 276 277 ret = pm_genpd_init(&domain->genpd, NULL, true); 278 if (ret) { 279 dev_err_probe(dev, ret, 280 "failed to init power domain \"%s\"\n", 281 data->gpc_name); 282 dev_pm_domain_detach(domain->power_dev, true); 283 goto cleanup_pds; 284 } 285 286 /* 287 * We use runtime PM to trigger power on/off of the upstream GPC 288 * domain, as a strict hierarchical parent/child power domain 289 * setup doesn't allow us to meet the sequencing requirements. 290 * This means we have nested locking of genpd locks, without the 291 * nesting being visible at the genpd level, so we need a 292 * separate lock class to make lockdep aware of the fact that 293 * this are separate domain locks that can be nested without a 294 * self-deadlock. 295 */ 296 lockdep_set_class(&domain->genpd.mlock, 297 &blk_ctrl_genpd_lock_class); 298 299 bc->onecell_data.domains[i] = &domain->genpd; 300 } 301 302 ret = of_genpd_add_provider_onecell(dev->of_node, &bc->onecell_data); 303 if (ret) { 304 dev_err_probe(dev, ret, "failed to add power domain provider\n"); 305 goto cleanup_pds; 306 } 307 308 bc->power_nb.notifier_call = bc_data->power_notifier_fn; 309 ret = dev_pm_genpd_add_notifier(bc->bus_power_dev, &bc->power_nb); 310 if (ret) { 311 dev_err_probe(dev, ret, "failed to add power notifier\n"); 312 goto cleanup_provider; 313 } 314 315 dev_set_drvdata(dev, bc); 316 317 ret = devm_of_platform_populate(dev); 318 if (ret) 319 goto cleanup_provider; 320 321 return 0; 322 323cleanup_provider: 324 of_genpd_del_provider(dev->of_node); 325cleanup_pds: 326 for (i--; i >= 0; i--) { 327 pm_genpd_remove(&bc->domains[i].genpd); 328 dev_pm_domain_detach(bc->domains[i].power_dev, true); 329 } 330 331 dev_pm_domain_detach(bc->bus_power_dev, true); 332 333 return ret; 334} 335 336static void imx8m_blk_ctrl_remove(struct platform_device *pdev) 337{ 338 struct imx8m_blk_ctrl *bc = dev_get_drvdata(&pdev->dev); 339 int i; 340 341 of_genpd_del_provider(pdev->dev.of_node); 342 343 for (i = 0; i < bc->onecell_data.num_domains; i++) { 344 struct imx8m_blk_ctrl_domain *domain = &bc->domains[i]; 345 346 pm_genpd_remove(&domain->genpd); 347 dev_pm_domain_detach(domain->power_dev, true); 348 } 349 350 dev_pm_genpd_remove_notifier(bc->bus_power_dev); 351 352 dev_pm_domain_detach(bc->bus_power_dev, true); 353} 354 355#ifdef CONFIG_PM_SLEEP 356static int imx8m_blk_ctrl_suspend(struct device *dev) 357{ 358 struct imx8m_blk_ctrl *bc = dev_get_drvdata(dev); 359 int ret, i; 360 361 /* 362 * This may look strange, but is done so the generic PM_SLEEP code 363 * can power down our domains and more importantly power them up again 364 * after resume, without tripping over our usage of runtime PM to 365 * control the upstream GPC domains. Things happen in the right order 366 * in the system suspend/resume paths due to the device parent/child 367 * hierarchy. 368 */ 369 ret = pm_runtime_get_sync(bc->bus_power_dev); 370 if (ret < 0) { 371 pm_runtime_put_noidle(bc->bus_power_dev); 372 return ret; 373 } 374 375 for (i = 0; i < bc->onecell_data.num_domains; i++) { 376 struct imx8m_blk_ctrl_domain *domain = &bc->domains[i]; 377 378 ret = pm_runtime_get_sync(domain->power_dev); 379 if (ret < 0) { 380 pm_runtime_put_noidle(domain->power_dev); 381 goto out_fail; 382 } 383 } 384 385 return 0; 386 387out_fail: 388 for (i--; i >= 0; i--) 389 pm_runtime_put(bc->domains[i].power_dev); 390 391 pm_runtime_put(bc->bus_power_dev); 392 393 return ret; 394} 395 396static int imx8m_blk_ctrl_resume(struct device *dev) 397{ 398 struct imx8m_blk_ctrl *bc = dev_get_drvdata(dev); 399 int i; 400 401 for (i = 0; i < bc->onecell_data.num_domains; i++) 402 pm_runtime_put(bc->domains[i].power_dev); 403 404 pm_runtime_put(bc->bus_power_dev); 405 406 return 0; 407} 408#endif 409 410static const struct dev_pm_ops imx8m_blk_ctrl_pm_ops = { 411 SET_SYSTEM_SLEEP_PM_OPS(imx8m_blk_ctrl_suspend, imx8m_blk_ctrl_resume) 412}; 413 414static int imx8mm_vpu_power_notifier(struct notifier_block *nb, 415 unsigned long action, void *data) 416{ 417 struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl, 418 power_nb); 419 420 if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF) 421 return NOTIFY_OK; 422 423 /* 424 * The ADB in the VPUMIX domain has no separate reset and clock 425 * enable bits, but is ungated together with the VPU clocks. To 426 * allow the handshake with the GPC to progress we put the VPUs 427 * in reset and ungate the clocks. 428 */ 429 regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, BIT(0) | BIT(1) | BIT(2)); 430 regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(0) | BIT(1) | BIT(2)); 431 432 if (action == GENPD_NOTIFY_ON) { 433 /* 434 * On power up we have no software backchannel to the GPC to 435 * wait for the ADB handshake to happen, so we just delay for a 436 * bit. On power down the GPC driver waits for the handshake. 437 */ 438 udelay(5); 439 440 /* set "fuse" bits to enable the VPUs */ 441 regmap_set_bits(bc->regmap, 0x8, 0xffffffff); 442 regmap_set_bits(bc->regmap, 0xc, 0xffffffff); 443 regmap_set_bits(bc->regmap, 0x10, 0xffffffff); 444 regmap_set_bits(bc->regmap, 0x14, 0xffffffff); 445 } 446 447 return NOTIFY_OK; 448} 449 450static const struct imx8m_blk_ctrl_domain_data imx8mm_vpu_blk_ctl_domain_data[] = { 451 [IMX8MM_VPUBLK_PD_G1] = { 452 .name = "vpublk-g1", 453 .clk_names = (const char *[]){ "g1", }, 454 .num_clks = 1, 455 .gpc_name = "g1", 456 .rst_mask = BIT(1), 457 .clk_mask = BIT(1), 458 }, 459 [IMX8MM_VPUBLK_PD_G2] = { 460 .name = "vpublk-g2", 461 .clk_names = (const char *[]){ "g2", }, 462 .num_clks = 1, 463 .gpc_name = "g2", 464 .rst_mask = BIT(0), 465 .clk_mask = BIT(0), 466 }, 467 [IMX8MM_VPUBLK_PD_H1] = { 468 .name = "vpublk-h1", 469 .clk_names = (const char *[]){ "h1", }, 470 .num_clks = 1, 471 .gpc_name = "h1", 472 .rst_mask = BIT(2), 473 .clk_mask = BIT(2), 474 }, 475}; 476 477static const struct imx8m_blk_ctrl_data imx8mm_vpu_blk_ctl_dev_data = { 478 .max_reg = 0x18, 479 .power_notifier_fn = imx8mm_vpu_power_notifier, 480 .domains = imx8mm_vpu_blk_ctl_domain_data, 481 .num_domains = ARRAY_SIZE(imx8mm_vpu_blk_ctl_domain_data), 482}; 483 484static const struct imx8m_blk_ctrl_domain_data imx8mp_vpu_blk_ctl_domain_data[] = { 485 [IMX8MP_VPUBLK_PD_G1] = { 486 .name = "vpublk-g1", 487 .clk_names = (const char *[]){ "g1", }, 488 .num_clks = 1, 489 .gpc_name = "g1", 490 .rst_mask = BIT(1), 491 .clk_mask = BIT(1), 492 .path_names = (const char *[]){"g1"}, 493 .num_paths = 1, 494 }, 495 [IMX8MP_VPUBLK_PD_G2] = { 496 .name = "vpublk-g2", 497 .clk_names = (const char *[]){ "g2", }, 498 .num_clks = 1, 499 .gpc_name = "g2", 500 .rst_mask = BIT(0), 501 .clk_mask = BIT(0), 502 .path_names = (const char *[]){"g2"}, 503 .num_paths = 1, 504 }, 505 [IMX8MP_VPUBLK_PD_VC8000E] = { 506 .name = "vpublk-vc8000e", 507 .clk_names = (const char *[]){ "vc8000e", }, 508 .num_clks = 1, 509 .gpc_name = "vc8000e", 510 .rst_mask = BIT(2), 511 .clk_mask = BIT(2), 512 .path_names = (const char *[]){"vc8000e"}, 513 .num_paths = 1, 514 }, 515}; 516 517static const struct imx8m_blk_ctrl_data imx8mp_vpu_blk_ctl_dev_data = { 518 .max_reg = 0x18, 519 .power_notifier_fn = imx8mm_vpu_power_notifier, 520 .domains = imx8mp_vpu_blk_ctl_domain_data, 521 .num_domains = ARRAY_SIZE(imx8mp_vpu_blk_ctl_domain_data), 522}; 523 524static int imx8mm_disp_power_notifier(struct notifier_block *nb, 525 unsigned long action, void *data) 526{ 527 struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl, 528 power_nb); 529 530 if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF) 531 return NOTIFY_OK; 532 533 /* Enable bus clock and deassert bus reset */ 534 regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(12)); 535 regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(6)); 536 537 /* 538 * On power up we have no software backchannel to the GPC to 539 * wait for the ADB handshake to happen, so we just delay for a 540 * bit. On power down the GPC driver waits for the handshake. 541 */ 542 if (action == GENPD_NOTIFY_ON) 543 udelay(5); 544 545 546 return NOTIFY_OK; 547} 548 549static const struct imx8m_blk_ctrl_domain_data imx8mm_disp_blk_ctl_domain_data[] = { 550 [IMX8MM_DISPBLK_PD_CSI_BRIDGE] = { 551 .name = "dispblk-csi-bridge", 552 .clk_names = (const char *[]){ "csi-bridge-axi", "csi-bridge-apb", 553 "csi-bridge-core", }, 554 .num_clks = 3, 555 .gpc_name = "csi-bridge", 556 .rst_mask = BIT(0) | BIT(1) | BIT(2), 557 .clk_mask = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5), 558 }, 559 [IMX8MM_DISPBLK_PD_LCDIF] = { 560 .name = "dispblk-lcdif", 561 .clk_names = (const char *[]){ "lcdif-axi", "lcdif-apb", "lcdif-pix", }, 562 .num_clks = 3, 563 .gpc_name = "lcdif", 564 .clk_mask = BIT(6) | BIT(7), 565 }, 566 [IMX8MM_DISPBLK_PD_MIPI_DSI] = { 567 .name = "dispblk-mipi-dsi", 568 .clk_names = (const char *[]){ "dsi-pclk", "dsi-ref", }, 569 .num_clks = 2, 570 .gpc_name = "mipi-dsi", 571 .rst_mask = BIT(5), 572 .clk_mask = BIT(8) | BIT(9), 573 .mipi_phy_rst_mask = BIT(17), 574 }, 575 [IMX8MM_DISPBLK_PD_MIPI_CSI] = { 576 .name = "dispblk-mipi-csi", 577 .clk_names = (const char *[]){ "csi-aclk", "csi-pclk" }, 578 .num_clks = 2, 579 .gpc_name = "mipi-csi", 580 .rst_mask = BIT(3) | BIT(4), 581 .clk_mask = BIT(10) | BIT(11), 582 .mipi_phy_rst_mask = BIT(16), 583 }, 584}; 585 586static const struct imx8m_blk_ctrl_data imx8mm_disp_blk_ctl_dev_data = { 587 .max_reg = 0x2c, 588 .power_notifier_fn = imx8mm_disp_power_notifier, 589 .domains = imx8mm_disp_blk_ctl_domain_data, 590 .num_domains = ARRAY_SIZE(imx8mm_disp_blk_ctl_domain_data), 591}; 592 593 594static int imx8mn_disp_power_notifier(struct notifier_block *nb, 595 unsigned long action, void *data) 596{ 597 struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl, 598 power_nb); 599 600 if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF) 601 return NOTIFY_OK; 602 603 /* Enable bus clock and deassert bus reset */ 604 regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(8)); 605 regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(8)); 606 607 /* 608 * On power up we have no software backchannel to the GPC to 609 * wait for the ADB handshake to happen, so we just delay for a 610 * bit. On power down the GPC driver waits for the handshake. 611 */ 612 if (action == GENPD_NOTIFY_ON) 613 udelay(5); 614 615 616 return NOTIFY_OK; 617} 618 619static const struct imx8m_blk_ctrl_domain_data imx8mn_disp_blk_ctl_domain_data[] = { 620 [IMX8MN_DISPBLK_PD_MIPI_DSI] = { 621 .name = "dispblk-mipi-dsi", 622 .clk_names = (const char *[]){ "dsi-pclk", "dsi-ref", }, 623 .num_clks = 2, 624 .gpc_name = "mipi-dsi", 625 .rst_mask = BIT(0) | BIT(1), 626 .clk_mask = BIT(0) | BIT(1), 627 .mipi_phy_rst_mask = BIT(17), 628 }, 629 [IMX8MN_DISPBLK_PD_MIPI_CSI] = { 630 .name = "dispblk-mipi-csi", 631 .clk_names = (const char *[]){ "csi-aclk", "csi-pclk" }, 632 .num_clks = 2, 633 .gpc_name = "mipi-csi", 634 .rst_mask = BIT(2) | BIT(3), 635 .clk_mask = BIT(2) | BIT(3), 636 .mipi_phy_rst_mask = BIT(16), 637 }, 638 [IMX8MN_DISPBLK_PD_LCDIF] = { 639 .name = "dispblk-lcdif", 640 .clk_names = (const char *[]){ "lcdif-axi", "lcdif-apb", "lcdif-pix", }, 641 .num_clks = 3, 642 .gpc_name = "lcdif", 643 .rst_mask = BIT(4) | BIT(5), 644 .clk_mask = BIT(4) | BIT(5), 645 }, 646 [IMX8MN_DISPBLK_PD_ISI] = { 647 .name = "dispblk-isi", 648 .clk_names = (const char *[]){ "disp_axi", "disp_apb", "disp_axi_root", 649 "disp_apb_root"}, 650 .num_clks = 4, 651 .gpc_name = "isi", 652 .rst_mask = BIT(6) | BIT(7), 653 .clk_mask = BIT(6) | BIT(7), 654 }, 655}; 656 657static const struct imx8m_blk_ctrl_data imx8mn_disp_blk_ctl_dev_data = { 658 .max_reg = 0x84, 659 .power_notifier_fn = imx8mn_disp_power_notifier, 660 .domains = imx8mn_disp_blk_ctl_domain_data, 661 .num_domains = ARRAY_SIZE(imx8mn_disp_blk_ctl_domain_data), 662}; 663 664#define LCDIF_ARCACHE_CTRL 0x4c 665#define LCDIF_1_RD_HURRY GENMASK(15, 13) 666#define LCDIF_0_RD_HURRY GENMASK(12, 10) 667 668#define ISI_CACHE_CTRL 0x50 669#define ISI_V_WR_HURRY GENMASK(28, 26) 670#define ISI_U_WR_HURRY GENMASK(25, 23) 671#define ISI_Y_WR_HURRY GENMASK(22, 20) 672 673static int imx8mp_media_power_notifier(struct notifier_block *nb, 674 unsigned long action, void *data) 675{ 676 struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl, 677 power_nb); 678 679 if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF) 680 return NOTIFY_OK; 681 682 /* Enable bus clock and deassert bus reset */ 683 regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(8)); 684 regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(8)); 685 686 if (action == GENPD_NOTIFY_ON) { 687 /* 688 * On power up we have no software backchannel to the GPC to 689 * wait for the ADB handshake to happen, so we just delay for a 690 * bit. On power down the GPC driver waits for the handshake. 691 */ 692 udelay(5); 693 694 /* 695 * Set panic read hurry level for both LCDIF interfaces to 696 * maximum priority to minimize chances of display FIFO 697 * underflow. 698 */ 699 regmap_set_bits(bc->regmap, LCDIF_ARCACHE_CTRL, 700 FIELD_PREP(LCDIF_1_RD_HURRY, 7) | 701 FIELD_PREP(LCDIF_0_RD_HURRY, 7)); 702 /* Same here for ISI */ 703 regmap_set_bits(bc->regmap, ISI_CACHE_CTRL, 704 FIELD_PREP(ISI_V_WR_HURRY, 7) | 705 FIELD_PREP(ISI_U_WR_HURRY, 7) | 706 FIELD_PREP(ISI_Y_WR_HURRY, 7)); 707 } 708 709 return NOTIFY_OK; 710} 711 712/* 713 * From i.MX 8M Plus Applications Processor Reference Manual, Rev. 1, 714 * section 13.2.2, 13.2.3 715 * isp-ahb and dwe are not in Figure 13-5. Media BLK_CTRL Clocks 716 */ 717static const struct imx8m_blk_ctrl_domain_data imx8mp_media_blk_ctl_domain_data[] = { 718 [IMX8MP_MEDIABLK_PD_MIPI_DSI_1] = { 719 .name = "mediablk-mipi-dsi-1", 720 .clk_names = (const char *[]){ "apb", "phy", }, 721 .num_clks = 2, 722 .gpc_name = "mipi-dsi1", 723 .rst_mask = BIT(0) | BIT(1), 724 .clk_mask = BIT(0) | BIT(1), 725 .mipi_phy_rst_mask = BIT(17), 726 }, 727 [IMX8MP_MEDIABLK_PD_MIPI_CSI2_1] = { 728 .name = "mediablk-mipi-csi2-1", 729 .clk_names = (const char *[]){ "apb", "cam1" }, 730 .num_clks = 2, 731 .gpc_name = "mipi-csi1", 732 .rst_mask = BIT(2) | BIT(3), 733 .clk_mask = BIT(2) | BIT(3), 734 .mipi_phy_rst_mask = BIT(16), 735 }, 736 [IMX8MP_MEDIABLK_PD_LCDIF_1] = { 737 .name = "mediablk-lcdif-1", 738 .clk_names = (const char *[]){ "disp1", "apb", "axi", }, 739 .num_clks = 3, 740 .gpc_name = "lcdif1", 741 .rst_mask = BIT(4) | BIT(5) | BIT(23), 742 .clk_mask = BIT(4) | BIT(5) | BIT(23), 743 .path_names = (const char *[]){"lcdif-rd", "lcdif-wr"}, 744 .num_paths = 2, 745 }, 746 [IMX8MP_MEDIABLK_PD_ISI] = { 747 .name = "mediablk-isi", 748 .clk_names = (const char *[]){ "axi", "apb" }, 749 .num_clks = 2, 750 .gpc_name = "isi", 751 .rst_mask = BIT(6) | BIT(7), 752 .clk_mask = BIT(6) | BIT(7), 753 .path_names = (const char *[]){"isi0", "isi1", "isi2"}, 754 .num_paths = 3, 755 }, 756 [IMX8MP_MEDIABLK_PD_MIPI_CSI2_2] = { 757 .name = "mediablk-mipi-csi2-2", 758 .clk_names = (const char *[]){ "apb", "cam2" }, 759 .num_clks = 2, 760 .gpc_name = "mipi-csi2", 761 .rst_mask = BIT(9) | BIT(10), 762 .clk_mask = BIT(9) | BIT(10), 763 .mipi_phy_rst_mask = BIT(30), 764 }, 765 [IMX8MP_MEDIABLK_PD_LCDIF_2] = { 766 .name = "mediablk-lcdif-2", 767 .clk_names = (const char *[]){ "disp2", "apb", "axi", }, 768 .num_clks = 3, 769 .gpc_name = "lcdif2", 770 .rst_mask = BIT(11) | BIT(12) | BIT(24), 771 .clk_mask = BIT(11) | BIT(12) | BIT(24), 772 .path_names = (const char *[]){"lcdif-rd", "lcdif-wr"}, 773 .num_paths = 2, 774 }, 775 [IMX8MP_MEDIABLK_PD_ISP] = { 776 .name = "mediablk-isp", 777 .clk_names = (const char *[]){ "isp", "axi", "apb" }, 778 .num_clks = 3, 779 .gpc_name = "isp", 780 .rst_mask = BIT(16) | BIT(17) | BIT(18), 781 .clk_mask = BIT(16) | BIT(17) | BIT(18), 782 .path_names = (const char *[]){"isp0", "isp1"}, 783 .num_paths = 2, 784 }, 785 [IMX8MP_MEDIABLK_PD_DWE] = { 786 .name = "mediablk-dwe", 787 .clk_names = (const char *[]){ "axi", "apb" }, 788 .num_clks = 2, 789 .gpc_name = "dwe", 790 .rst_mask = BIT(19) | BIT(20) | BIT(21), 791 .clk_mask = BIT(19) | BIT(20) | BIT(21), 792 .path_names = (const char *[]){"dwe"}, 793 .num_paths = 1, 794 }, 795 [IMX8MP_MEDIABLK_PD_MIPI_DSI_2] = { 796 .name = "mediablk-mipi-dsi-2", 797 .clk_names = (const char *[]){ "phy", }, 798 .num_clks = 1, 799 .gpc_name = "mipi-dsi2", 800 .rst_mask = BIT(22), 801 .clk_mask = BIT(22), 802 .mipi_phy_rst_mask = BIT(29), 803 }, 804}; 805 806static const struct imx8m_blk_ctrl_data imx8mp_media_blk_ctl_dev_data = { 807 .max_reg = 0x138, 808 .power_notifier_fn = imx8mp_media_power_notifier, 809 .domains = imx8mp_media_blk_ctl_domain_data, 810 .num_domains = ARRAY_SIZE(imx8mp_media_blk_ctl_domain_data), 811}; 812 813static int imx8mq_vpu_power_notifier(struct notifier_block *nb, 814 unsigned long action, void *data) 815{ 816 struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl, 817 power_nb); 818 819 if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF) 820 return NOTIFY_OK; 821 822 /* 823 * The ADB in the VPUMIX domain has no separate reset and clock 824 * enable bits, but is ungated and reset together with the VPUs. The 825 * reset and clock enable inputs to the ADB is a logical OR of the 826 * VPU bits. In order to set the G2 fuse bits, the G2 clock must 827 * also be enabled. 828 */ 829 regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(0) | BIT(1)); 830 regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(0) | BIT(1)); 831 832 if (action == GENPD_NOTIFY_ON) { 833 /* 834 * On power up we have no software backchannel to the GPC to 835 * wait for the ADB handshake to happen, so we just delay for a 836 * bit. On power down the GPC driver waits for the handshake. 837 */ 838 udelay(5); 839 840 /* set "fuse" bits to enable the VPUs */ 841 regmap_set_bits(bc->regmap, 0x8, 0xffffffff); 842 regmap_set_bits(bc->regmap, 0xc, 0xffffffff); 843 regmap_set_bits(bc->regmap, 0x10, 0xffffffff); 844 } 845 846 return NOTIFY_OK; 847} 848 849/* 850 * For i.MX8MQ, the ADB in the VPUMIX domain has no separate reset and clock 851 * enable bits, but is ungated and reset together with the VPUs. 852 * Resetting G1 or G2 separately may led to system hang. 853 * Remove the rst_mask and clk_mask from the domain data of G1 and G2, 854 * Let imx8mq_vpu_power_notifier() do really vpu reset. 855 */ 856static const struct imx8m_blk_ctrl_domain_data imx8mq_vpu_blk_ctl_domain_data[] = { 857 [IMX8MQ_VPUBLK_PD_G1] = { 858 .name = "vpublk-g1", 859 .clk_names = (const char *[]){ "g1", }, 860 .num_clks = 1, 861 .gpc_name = "g1", 862 }, 863 [IMX8MQ_VPUBLK_PD_G2] = { 864 .name = "vpublk-g2", 865 .clk_names = (const char *[]){ "g2", }, 866 .num_clks = 1, 867 .gpc_name = "g2", 868 }, 869}; 870 871static const struct imx8m_blk_ctrl_data imx8mq_vpu_blk_ctl_dev_data = { 872 .max_reg = 0x14, 873 .power_notifier_fn = imx8mq_vpu_power_notifier, 874 .domains = imx8mq_vpu_blk_ctl_domain_data, 875 .num_domains = ARRAY_SIZE(imx8mq_vpu_blk_ctl_domain_data), 876}; 877 878static const struct of_device_id imx8m_blk_ctrl_of_match[] = { 879 { 880 .compatible = "fsl,imx8mm-vpu-blk-ctrl", 881 .data = &imx8mm_vpu_blk_ctl_dev_data 882 }, { 883 .compatible = "fsl,imx8mm-disp-blk-ctrl", 884 .data = &imx8mm_disp_blk_ctl_dev_data 885 }, { 886 .compatible = "fsl,imx8mn-disp-blk-ctrl", 887 .data = &imx8mn_disp_blk_ctl_dev_data 888 }, { 889 .compatible = "fsl,imx8mp-media-blk-ctrl", 890 .data = &imx8mp_media_blk_ctl_dev_data 891 }, { 892 .compatible = "fsl,imx8mq-vpu-blk-ctrl", 893 .data = &imx8mq_vpu_blk_ctl_dev_data 894 }, { 895 .compatible = "fsl,imx8mp-vpu-blk-ctrl", 896 .data = &imx8mp_vpu_blk_ctl_dev_data 897 }, { 898 /* Sentinel */ 899 } 900}; 901MODULE_DEVICE_TABLE(of, imx8m_blk_ctrl_of_match); 902 903static struct platform_driver imx8m_blk_ctrl_driver = { 904 .probe = imx8m_blk_ctrl_probe, 905 .remove = imx8m_blk_ctrl_remove, 906 .driver = { 907 .name = "imx8m-blk-ctrl", 908 .pm = &imx8m_blk_ctrl_pm_ops, 909 .of_match_table = imx8m_blk_ctrl_of_match, 910 .suppress_bind_attrs = true, 911 }, 912}; 913module_platform_driver(imx8m_blk_ctrl_driver); 914MODULE_LICENSE("GPL");
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