1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2013 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #include <linux/delay.h> 8 9 #include <drm/drm_vblank.h> 10 11 #include "msm_drv.h" 12 #include "msm_gem.h" 13 #include "msm_mmu.h" 14 #include "mdp4_kms.h" 15 16 static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev); 17 18 static int mdp4_hw_init(struct msm_kms *kms) 19 { 20 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 21 struct drm_device *dev = mdp4_kms->dev; 22 uint32_t version, major, minor, dmap_cfg, vg_cfg; 23 unsigned long clk; 24 int ret = 0; 25 26 pm_runtime_get_sync(dev->dev); 27 28 mdp4_enable(mdp4_kms); 29 version = mdp4_read(mdp4_kms, REG_MDP4_VERSION); 30 mdp4_disable(mdp4_kms); 31 32 major = FIELD(version, MDP4_VERSION_MAJOR); 33 minor = FIELD(version, MDP4_VERSION_MINOR); 34 35 DBG("found MDP4 version v%d.%d", major, minor); 36 37 if (major != 4) { 38 DRM_DEV_ERROR(dev->dev, "unexpected MDP version: v%d.%d\n", 39 major, minor); 40 ret = -ENXIO; 41 goto out; 42 } 43 44 mdp4_kms->rev = minor; 45 46 if (mdp4_kms->rev > 1) { 47 mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER0, 0x0707ffff); 48 mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER1, 0x03073f3f); 49 } 50 51 mdp4_write(mdp4_kms, REG_MDP4_PORTMAP_MODE, 0x3); 52 53 /* max read pending cmd config, 3 pending requests: */ 54 mdp4_write(mdp4_kms, REG_MDP4_READ_CNFG, 0x02222); 55 56 clk = clk_get_rate(mdp4_kms->clk); 57 58 if ((mdp4_kms->rev >= 1) || (clk >= 90000000)) { 59 dmap_cfg = 0x47; /* 16 bytes-burst x 8 req */ 60 vg_cfg = 0x47; /* 16 bytes-burs x 8 req */ 61 } else { 62 dmap_cfg = 0x27; /* 8 bytes-burst x 8 req */ 63 vg_cfg = 0x43; /* 16 bytes-burst x 4 req */ 64 } 65 66 DBG("fetch config: dmap=%02x, vg=%02x", dmap_cfg, vg_cfg); 67 68 mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_P), dmap_cfg); 69 mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_E), dmap_cfg); 70 71 mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG1), vg_cfg); 72 mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG2), vg_cfg); 73 mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB1), vg_cfg); 74 mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB2), vg_cfg); 75 76 if (mdp4_kms->rev >= 2) 77 mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG_UPDATE_METHOD, 1); 78 mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG, 0); 79 80 /* disable CSC matrix / YUV by default: */ 81 mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG1), 0); 82 mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG2), 0); 83 mdp4_write(mdp4_kms, REG_MDP4_DMA_P_OP_MODE, 0); 84 mdp4_write(mdp4_kms, REG_MDP4_DMA_S_OP_MODE, 0); 85 mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(1), 0); 86 mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(2), 0); 87 88 if (mdp4_kms->rev > 1) 89 mdp4_write(mdp4_kms, REG_MDP4_RESET_STATUS, 1); 90 91 out: 92 pm_runtime_put_sync(dev->dev); 93 94 return ret; 95 } 96 97 static void mdp4_enable_commit(struct msm_kms *kms) 98 { 99 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 100 mdp4_enable(mdp4_kms); 101 } 102 103 static void mdp4_disable_commit(struct msm_kms *kms) 104 { 105 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 106 mdp4_disable(mdp4_kms); 107 } 108 109 static void mdp4_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state) 110 { 111 int i; 112 struct drm_crtc *crtc; 113 struct drm_crtc_state *crtc_state; 114 115 /* see 119ecb7fd */ 116 for_each_new_crtc_in_state(state, crtc, crtc_state, i) 117 drm_crtc_vblank_get(crtc); 118 } 119 120 static void mdp4_flush_commit(struct msm_kms *kms, unsigned crtc_mask) 121 { 122 /* TODO */ 123 } 124 125 static void mdp4_wait_flush(struct msm_kms *kms, unsigned crtc_mask) 126 { 127 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 128 struct drm_crtc *crtc; 129 130 for_each_crtc_mask(mdp4_kms->dev, crtc, crtc_mask) 131 mdp4_crtc_wait_for_commit_done(crtc); 132 } 133 134 static void mdp4_complete_commit(struct msm_kms *kms, unsigned crtc_mask) 135 { 136 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 137 struct drm_crtc *crtc; 138 139 /* see 119ecb7fd */ 140 for_each_crtc_mask(mdp4_kms->dev, crtc, crtc_mask) 141 drm_crtc_vblank_put(crtc); 142 } 143 144 static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate, 145 struct drm_encoder *encoder) 146 { 147 /* if we had >1 encoder, we'd need something more clever: */ 148 switch (encoder->encoder_type) { 149 case DRM_MODE_ENCODER_TMDS: 150 return mdp4_dtv_round_pixclk(encoder, rate); 151 case DRM_MODE_ENCODER_LVDS: 152 case DRM_MODE_ENCODER_DSI: 153 default: 154 return rate; 155 } 156 } 157 158 static void mdp4_destroy(struct msm_kms *kms) 159 { 160 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 161 struct device *dev = mdp4_kms->dev->dev; 162 struct msm_gem_address_space *aspace = kms->aspace; 163 164 if (mdp4_kms->blank_cursor_iova) 165 msm_gem_unpin_iova(mdp4_kms->blank_cursor_bo, kms->aspace); 166 drm_gem_object_put(mdp4_kms->blank_cursor_bo); 167 168 if (aspace) { 169 aspace->mmu->funcs->detach(aspace->mmu); 170 msm_gem_address_space_put(aspace); 171 } 172 173 if (mdp4_kms->rpm_enabled) 174 pm_runtime_disable(dev); 175 176 mdp_kms_destroy(&mdp4_kms->base); 177 178 kfree(mdp4_kms); 179 } 180 181 static const struct mdp_kms_funcs kms_funcs = { 182 .base = { 183 .hw_init = mdp4_hw_init, 184 .irq_preinstall = mdp4_irq_preinstall, 185 .irq_postinstall = mdp4_irq_postinstall, 186 .irq_uninstall = mdp4_irq_uninstall, 187 .irq = mdp4_irq, 188 .enable_vblank = mdp4_enable_vblank, 189 .disable_vblank = mdp4_disable_vblank, 190 .enable_commit = mdp4_enable_commit, 191 .disable_commit = mdp4_disable_commit, 192 .prepare_commit = mdp4_prepare_commit, 193 .flush_commit = mdp4_flush_commit, 194 .wait_flush = mdp4_wait_flush, 195 .complete_commit = mdp4_complete_commit, 196 .get_format = mdp_get_format, 197 .round_pixclk = mdp4_round_pixclk, 198 .destroy = mdp4_destroy, 199 }, 200 .set_irqmask = mdp4_set_irqmask, 201 }; 202 203 int mdp4_disable(struct mdp4_kms *mdp4_kms) 204 { 205 DBG(""); 206 207 clk_disable_unprepare(mdp4_kms->clk); 208 if (mdp4_kms->pclk) 209 clk_disable_unprepare(mdp4_kms->pclk); 210 if (mdp4_kms->lut_clk) 211 clk_disable_unprepare(mdp4_kms->lut_clk); 212 if (mdp4_kms->axi_clk) 213 clk_disable_unprepare(mdp4_kms->axi_clk); 214 215 return 0; 216 } 217 218 int mdp4_enable(struct mdp4_kms *mdp4_kms) 219 { 220 DBG(""); 221 222 clk_prepare_enable(mdp4_kms->clk); 223 if (mdp4_kms->pclk) 224 clk_prepare_enable(mdp4_kms->pclk); 225 if (mdp4_kms->lut_clk) 226 clk_prepare_enable(mdp4_kms->lut_clk); 227 if (mdp4_kms->axi_clk) 228 clk_prepare_enable(mdp4_kms->axi_clk); 229 230 return 0; 231 } 232 233 234 static int mdp4_modeset_init_intf(struct mdp4_kms *mdp4_kms, 235 int intf_type) 236 { 237 struct drm_device *dev = mdp4_kms->dev; 238 struct msm_drm_private *priv = dev->dev_private; 239 struct drm_encoder *encoder; 240 struct drm_connector *connector; 241 struct device_node *panel_node; 242 int dsi_id; 243 int ret; 244 245 switch (intf_type) { 246 case DRM_MODE_ENCODER_LVDS: 247 /* 248 * bail out early if there is no panel node (no need to 249 * initialize LCDC encoder and LVDS connector) 250 */ 251 panel_node = of_graph_get_remote_node(dev->dev->of_node, 0, 0); 252 if (!panel_node) 253 return 0; 254 255 encoder = mdp4_lcdc_encoder_init(dev, panel_node); 256 if (IS_ERR(encoder)) { 257 DRM_DEV_ERROR(dev->dev, "failed to construct LCDC encoder\n"); 258 return PTR_ERR(encoder); 259 } 260 261 /* LCDC can be hooked to DMA_P (TODO: Add DMA_S later?) */ 262 encoder->possible_crtcs = 1 << DMA_P; 263 264 connector = mdp4_lvds_connector_init(dev, panel_node, encoder); 265 if (IS_ERR(connector)) { 266 DRM_DEV_ERROR(dev->dev, "failed to initialize LVDS connector\n"); 267 return PTR_ERR(connector); 268 } 269 270 priv->encoders[priv->num_encoders++] = encoder; 271 priv->connectors[priv->num_connectors++] = connector; 272 273 break; 274 case DRM_MODE_ENCODER_TMDS: 275 encoder = mdp4_dtv_encoder_init(dev); 276 if (IS_ERR(encoder)) { 277 DRM_DEV_ERROR(dev->dev, "failed to construct DTV encoder\n"); 278 return PTR_ERR(encoder); 279 } 280 281 /* DTV can be hooked to DMA_E: */ 282 encoder->possible_crtcs = 1 << 1; 283 284 if (priv->hdmi) { 285 /* Construct bridge/connector for HDMI: */ 286 ret = msm_hdmi_modeset_init(priv->hdmi, dev, encoder); 287 if (ret) { 288 DRM_DEV_ERROR(dev->dev, "failed to initialize HDMI: %d\n", ret); 289 return ret; 290 } 291 } 292 293 priv->encoders[priv->num_encoders++] = encoder; 294 295 break; 296 case DRM_MODE_ENCODER_DSI: 297 /* only DSI1 supported for now */ 298 dsi_id = 0; 299 300 if (!priv->dsi[dsi_id]) 301 break; 302 303 encoder = mdp4_dsi_encoder_init(dev); 304 if (IS_ERR(encoder)) { 305 ret = PTR_ERR(encoder); 306 DRM_DEV_ERROR(dev->dev, 307 "failed to construct DSI encoder: %d\n", ret); 308 return ret; 309 } 310 311 /* TODO: Add DMA_S later? */ 312 encoder->possible_crtcs = 1 << DMA_P; 313 priv->encoders[priv->num_encoders++] = encoder; 314 315 ret = msm_dsi_modeset_init(priv->dsi[dsi_id], dev, encoder); 316 if (ret) { 317 DRM_DEV_ERROR(dev->dev, "failed to initialize DSI: %d\n", 318 ret); 319 return ret; 320 } 321 322 break; 323 default: 324 DRM_DEV_ERROR(dev->dev, "Invalid or unsupported interface\n"); 325 return -EINVAL; 326 } 327 328 return 0; 329 } 330 331 static int modeset_init(struct mdp4_kms *mdp4_kms) 332 { 333 struct drm_device *dev = mdp4_kms->dev; 334 struct msm_drm_private *priv = dev->dev_private; 335 struct drm_plane *plane; 336 struct drm_crtc *crtc; 337 int i, ret; 338 static const enum mdp4_pipe rgb_planes[] = { 339 RGB1, RGB2, 340 }; 341 static const enum mdp4_pipe vg_planes[] = { 342 VG1, VG2, 343 }; 344 static const enum mdp4_dma mdp4_crtcs[] = { 345 DMA_P, DMA_E, 346 }; 347 static const char * const mdp4_crtc_names[] = { 348 "DMA_P", "DMA_E", 349 }; 350 static const int mdp4_intfs[] = { 351 DRM_MODE_ENCODER_LVDS, 352 DRM_MODE_ENCODER_DSI, 353 DRM_MODE_ENCODER_TMDS, 354 }; 355 356 /* construct non-private planes: */ 357 for (i = 0; i < ARRAY_SIZE(vg_planes); i++) { 358 plane = mdp4_plane_init(dev, vg_planes[i], false); 359 if (IS_ERR(plane)) { 360 DRM_DEV_ERROR(dev->dev, 361 "failed to construct plane for VG%d\n", i + 1); 362 ret = PTR_ERR(plane); 363 goto fail; 364 } 365 priv->planes[priv->num_planes++] = plane; 366 } 367 368 for (i = 0; i < ARRAY_SIZE(mdp4_crtcs); i++) { 369 plane = mdp4_plane_init(dev, rgb_planes[i], true); 370 if (IS_ERR(plane)) { 371 DRM_DEV_ERROR(dev->dev, 372 "failed to construct plane for RGB%d\n", i + 1); 373 ret = PTR_ERR(plane); 374 goto fail; 375 } 376 377 crtc = mdp4_crtc_init(dev, plane, priv->num_crtcs, i, 378 mdp4_crtcs[i]); 379 if (IS_ERR(crtc)) { 380 DRM_DEV_ERROR(dev->dev, "failed to construct crtc for %s\n", 381 mdp4_crtc_names[i]); 382 ret = PTR_ERR(crtc); 383 goto fail; 384 } 385 386 priv->crtcs[priv->num_crtcs++] = crtc; 387 } 388 389 /* 390 * we currently set up two relatively fixed paths: 391 * 392 * LCDC/LVDS path: RGB1 -> DMA_P -> LCDC -> LVDS 393 * or 394 * DSI path: RGB1 -> DMA_P -> DSI1 -> DSI Panel 395 * 396 * DTV/HDMI path: RGB2 -> DMA_E -> DTV -> HDMI 397 */ 398 399 for (i = 0; i < ARRAY_SIZE(mdp4_intfs); i++) { 400 ret = mdp4_modeset_init_intf(mdp4_kms, mdp4_intfs[i]); 401 if (ret) { 402 DRM_DEV_ERROR(dev->dev, "failed to initialize intf: %d, %d\n", 403 i, ret); 404 goto fail; 405 } 406 } 407 408 return 0; 409 410 fail: 411 return ret; 412 } 413 414 struct msm_kms *mdp4_kms_init(struct drm_device *dev) 415 { 416 struct platform_device *pdev = to_platform_device(dev->dev); 417 struct mdp4_platform_config *config = mdp4_get_config(pdev); 418 struct mdp4_kms *mdp4_kms; 419 struct msm_kms *kms = NULL; 420 struct msm_gem_address_space *aspace; 421 int irq, ret; 422 423 mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL); 424 if (!mdp4_kms) { 425 DRM_DEV_ERROR(dev->dev, "failed to allocate kms\n"); 426 ret = -ENOMEM; 427 goto fail; 428 } 429 430 ret = mdp_kms_init(&mdp4_kms->base, &kms_funcs); 431 if (ret) { 432 DRM_DEV_ERROR(dev->dev, "failed to init kms\n"); 433 goto fail; 434 } 435 436 kms = &mdp4_kms->base.base; 437 438 mdp4_kms->dev = dev; 439 440 mdp4_kms->mmio = msm_ioremap(pdev, NULL, "MDP4"); 441 if (IS_ERR(mdp4_kms->mmio)) { 442 ret = PTR_ERR(mdp4_kms->mmio); 443 goto fail; 444 } 445 446 irq = platform_get_irq(pdev, 0); 447 if (irq < 0) { 448 ret = irq; 449 DRM_DEV_ERROR(dev->dev, "failed to get irq: %d\n", ret); 450 goto fail; 451 } 452 453 kms->irq = irq; 454 455 /* NOTE: driver for this regulator still missing upstream.. use 456 * _get_exclusive() and ignore the error if it does not exist 457 * (and hope that the bootloader left it on for us) 458 */ 459 mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd"); 460 if (IS_ERR(mdp4_kms->vdd)) 461 mdp4_kms->vdd = NULL; 462 463 if (mdp4_kms->vdd) { 464 ret = regulator_enable(mdp4_kms->vdd); 465 if (ret) { 466 DRM_DEV_ERROR(dev->dev, "failed to enable regulator vdd: %d\n", ret); 467 goto fail; 468 } 469 } 470 471 mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk"); 472 if (IS_ERR(mdp4_kms->clk)) { 473 DRM_DEV_ERROR(dev->dev, "failed to get core_clk\n"); 474 ret = PTR_ERR(mdp4_kms->clk); 475 goto fail; 476 } 477 478 mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk"); 479 if (IS_ERR(mdp4_kms->pclk)) 480 mdp4_kms->pclk = NULL; 481 482 if (mdp4_kms->rev >= 2) { 483 mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk"); 484 if (IS_ERR(mdp4_kms->lut_clk)) { 485 DRM_DEV_ERROR(dev->dev, "failed to get lut_clk\n"); 486 ret = PTR_ERR(mdp4_kms->lut_clk); 487 goto fail; 488 } 489 } 490 491 mdp4_kms->axi_clk = devm_clk_get(&pdev->dev, "bus_clk"); 492 if (IS_ERR(mdp4_kms->axi_clk)) { 493 DRM_DEV_ERROR(dev->dev, "failed to get axi_clk\n"); 494 ret = PTR_ERR(mdp4_kms->axi_clk); 495 goto fail; 496 } 497 498 clk_set_rate(mdp4_kms->clk, config->max_clk); 499 if (mdp4_kms->lut_clk) 500 clk_set_rate(mdp4_kms->lut_clk, config->max_clk); 501 502 pm_runtime_enable(dev->dev); 503 mdp4_kms->rpm_enabled = true; 504 505 /* make sure things are off before attaching iommu (bootloader could 506 * have left things on, in which case we'll start getting faults if 507 * we don't disable): 508 */ 509 mdp4_enable(mdp4_kms); 510 mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0); 511 mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0); 512 mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0); 513 mdp4_disable(mdp4_kms); 514 mdelay(16); 515 516 if (config->iommu) { 517 struct msm_mmu *mmu = msm_iommu_new(&pdev->dev, 518 config->iommu); 519 520 aspace = msm_gem_address_space_create(mmu, 521 "mdp4", 0x1000, 0x100000000 - 0x1000); 522 523 if (IS_ERR(aspace)) { 524 if (!IS_ERR(mmu)) 525 mmu->funcs->destroy(mmu); 526 ret = PTR_ERR(aspace); 527 goto fail; 528 } 529 530 kms->aspace = aspace; 531 } else { 532 DRM_DEV_INFO(dev->dev, "no iommu, fallback to phys " 533 "contig buffers for scanout\n"); 534 aspace = NULL; 535 } 536 537 ret = modeset_init(mdp4_kms); 538 if (ret) { 539 DRM_DEV_ERROR(dev->dev, "modeset_init failed: %d\n", ret); 540 goto fail; 541 } 542 543 mdp4_kms->blank_cursor_bo = msm_gem_new(dev, SZ_16K, MSM_BO_WC | MSM_BO_SCANOUT); 544 if (IS_ERR(mdp4_kms->blank_cursor_bo)) { 545 ret = PTR_ERR(mdp4_kms->blank_cursor_bo); 546 DRM_DEV_ERROR(dev->dev, "could not allocate blank-cursor bo: %d\n", ret); 547 mdp4_kms->blank_cursor_bo = NULL; 548 goto fail; 549 } 550 551 ret = msm_gem_get_and_pin_iova(mdp4_kms->blank_cursor_bo, kms->aspace, 552 &mdp4_kms->blank_cursor_iova); 553 if (ret) { 554 DRM_DEV_ERROR(dev->dev, "could not pin blank-cursor bo: %d\n", ret); 555 goto fail; 556 } 557 558 dev->mode_config.min_width = 0; 559 dev->mode_config.min_height = 0; 560 dev->mode_config.max_width = 2048; 561 dev->mode_config.max_height = 2048; 562 563 return kms; 564 565 fail: 566 if (kms) 567 mdp4_destroy(kms); 568 return ERR_PTR(ret); 569 } 570 571 static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev) 572 { 573 static struct mdp4_platform_config config = {}; 574 575 /* TODO: Chips that aren't apq8064 have a 200 Mhz max_clk */ 576 config.max_clk = 266667000; 577 config.iommu = iommu_domain_alloc(&platform_bus_type); 578 579 return &config; 580 } 581