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 dev->mode_config.allow_fb_modifiers = true; 92 93 out: 94 pm_runtime_put_sync(dev->dev); 95 96 return ret; 97 } 98 99 static void mdp4_enable_commit(struct msm_kms *kms) 100 { 101 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 102 mdp4_enable(mdp4_kms); 103 } 104 105 static void mdp4_disable_commit(struct msm_kms *kms) 106 { 107 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 108 mdp4_disable(mdp4_kms); 109 } 110 111 static void mdp4_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state) 112 { 113 int i; 114 struct drm_crtc *crtc; 115 struct drm_crtc_state *crtc_state; 116 117 /* see 119ecb7fd */ 118 for_each_new_crtc_in_state(state, crtc, crtc_state, i) 119 drm_crtc_vblank_get(crtc); 120 } 121 122 static void mdp4_flush_commit(struct msm_kms *kms, unsigned crtc_mask) 123 { 124 /* TODO */ 125 } 126 127 static void mdp4_wait_flush(struct msm_kms *kms, unsigned crtc_mask) 128 { 129 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 130 struct drm_crtc *crtc; 131 132 for_each_crtc_mask(mdp4_kms->dev, crtc, crtc_mask) 133 mdp4_crtc_wait_for_commit_done(crtc); 134 } 135 136 static void mdp4_complete_commit(struct msm_kms *kms, unsigned crtc_mask) 137 { 138 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 139 struct drm_crtc *crtc; 140 141 /* see 119ecb7fd */ 142 for_each_crtc_mask(mdp4_kms->dev, crtc, crtc_mask) 143 drm_crtc_vblank_put(crtc); 144 } 145 146 static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate, 147 struct drm_encoder *encoder) 148 { 149 /* if we had >1 encoder, we'd need something more clever: */ 150 switch (encoder->encoder_type) { 151 case DRM_MODE_ENCODER_TMDS: 152 return mdp4_dtv_round_pixclk(encoder, rate); 153 case DRM_MODE_ENCODER_LVDS: 154 case DRM_MODE_ENCODER_DSI: 155 default: 156 return rate; 157 } 158 } 159 160 static void mdp4_destroy(struct msm_kms *kms) 161 { 162 struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); 163 struct device *dev = mdp4_kms->dev->dev; 164 struct msm_gem_address_space *aspace = kms->aspace; 165 166 if (mdp4_kms->blank_cursor_iova) 167 msm_gem_unpin_iova(mdp4_kms->blank_cursor_bo, kms->aspace); 168 drm_gem_object_put_unlocked(mdp4_kms->blank_cursor_bo); 169 170 if (aspace) { 171 aspace->mmu->funcs->detach(aspace->mmu); 172 msm_gem_address_space_put(aspace); 173 } 174 175 if (mdp4_kms->rpm_enabled) 176 pm_runtime_disable(dev); 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 mdp_kms_init(&mdp4_kms->base, &kms_funcs); 431 432 kms = &mdp4_kms->base.base; 433 434 mdp4_kms->dev = dev; 435 436 mdp4_kms->mmio = msm_ioremap(pdev, NULL, "MDP4"); 437 if (IS_ERR(mdp4_kms->mmio)) { 438 ret = PTR_ERR(mdp4_kms->mmio); 439 goto fail; 440 } 441 442 irq = platform_get_irq(pdev, 0); 443 if (irq < 0) { 444 ret = irq; 445 DRM_DEV_ERROR(dev->dev, "failed to get irq: %d\n", ret); 446 goto fail; 447 } 448 449 kms->irq = irq; 450 451 /* NOTE: driver for this regulator still missing upstream.. use 452 * _get_exclusive() and ignore the error if it does not exist 453 * (and hope that the bootloader left it on for us) 454 */ 455 mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd"); 456 if (IS_ERR(mdp4_kms->vdd)) 457 mdp4_kms->vdd = NULL; 458 459 if (mdp4_kms->vdd) { 460 ret = regulator_enable(mdp4_kms->vdd); 461 if (ret) { 462 DRM_DEV_ERROR(dev->dev, "failed to enable regulator vdd: %d\n", ret); 463 goto fail; 464 } 465 } 466 467 mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk"); 468 if (IS_ERR(mdp4_kms->clk)) { 469 DRM_DEV_ERROR(dev->dev, "failed to get core_clk\n"); 470 ret = PTR_ERR(mdp4_kms->clk); 471 goto fail; 472 } 473 474 mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk"); 475 if (IS_ERR(mdp4_kms->pclk)) 476 mdp4_kms->pclk = NULL; 477 478 if (mdp4_kms->rev >= 2) { 479 mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk"); 480 if (IS_ERR(mdp4_kms->lut_clk)) { 481 DRM_DEV_ERROR(dev->dev, "failed to get lut_clk\n"); 482 ret = PTR_ERR(mdp4_kms->lut_clk); 483 goto fail; 484 } 485 } 486 487 mdp4_kms->axi_clk = devm_clk_get(&pdev->dev, "bus_clk"); 488 if (IS_ERR(mdp4_kms->axi_clk)) { 489 DRM_DEV_ERROR(dev->dev, "failed to get axi_clk\n"); 490 ret = PTR_ERR(mdp4_kms->axi_clk); 491 goto fail; 492 } 493 494 clk_set_rate(mdp4_kms->clk, config->max_clk); 495 if (mdp4_kms->lut_clk) 496 clk_set_rate(mdp4_kms->lut_clk, config->max_clk); 497 498 pm_runtime_enable(dev->dev); 499 mdp4_kms->rpm_enabled = true; 500 501 /* make sure things are off before attaching iommu (bootloader could 502 * have left things on, in which case we'll start getting faults if 503 * we don't disable): 504 */ 505 mdp4_enable(mdp4_kms); 506 mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0); 507 mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0); 508 mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0); 509 mdp4_disable(mdp4_kms); 510 mdelay(16); 511 512 if (config->iommu) { 513 aspace = msm_gem_address_space_create(&pdev->dev, 514 config->iommu, "mdp4"); 515 if (IS_ERR(aspace)) { 516 ret = PTR_ERR(aspace); 517 goto fail; 518 } 519 520 kms->aspace = aspace; 521 522 ret = aspace->mmu->funcs->attach(aspace->mmu); 523 if (ret) 524 goto fail; 525 } else { 526 DRM_DEV_INFO(dev->dev, "no iommu, fallback to phys " 527 "contig buffers for scanout\n"); 528 aspace = NULL; 529 } 530 531 ret = modeset_init(mdp4_kms); 532 if (ret) { 533 DRM_DEV_ERROR(dev->dev, "modeset_init failed: %d\n", ret); 534 goto fail; 535 } 536 537 mdp4_kms->blank_cursor_bo = msm_gem_new(dev, SZ_16K, MSM_BO_WC | MSM_BO_SCANOUT); 538 if (IS_ERR(mdp4_kms->blank_cursor_bo)) { 539 ret = PTR_ERR(mdp4_kms->blank_cursor_bo); 540 DRM_DEV_ERROR(dev->dev, "could not allocate blank-cursor bo: %d\n", ret); 541 mdp4_kms->blank_cursor_bo = NULL; 542 goto fail; 543 } 544 545 ret = msm_gem_get_and_pin_iova(mdp4_kms->blank_cursor_bo, kms->aspace, 546 &mdp4_kms->blank_cursor_iova); 547 if (ret) { 548 DRM_DEV_ERROR(dev->dev, "could not pin blank-cursor bo: %d\n", ret); 549 goto fail; 550 } 551 552 dev->mode_config.min_width = 0; 553 dev->mode_config.min_height = 0; 554 dev->mode_config.max_width = 2048; 555 dev->mode_config.max_height = 2048; 556 557 return kms; 558 559 fail: 560 if (kms) 561 mdp4_destroy(kms); 562 return ERR_PTR(ret); 563 } 564 565 static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev) 566 { 567 static struct mdp4_platform_config config = {}; 568 569 /* TODO: Chips that aren't apq8064 have a 200 Mhz max_clk */ 570 config.max_clk = 266667000; 571 config.iommu = iommu_domain_alloc(&platform_bus_type); 572 if (config.iommu) { 573 config.iommu->geometry.aperture_start = 0x1000; 574 config.iommu->geometry.aperture_end = 0xffffffff; 575 } 576 577 return &config; 578 } 579