drivers/gpu/drm/meson/meson_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2016 BayLibre, SAS
   4  * Author: Neil Armstrong <narmstrong@baylibre.com>
   5  * Copyright (C) 2014 Endless Mobile
   6  *
   7  * Written by:
   8  *     Jasper St. Pierre <jstpierre@mecheye.net>
   9  */
  10
  11 #include <linux/component.h>
  12 #include <linux/module.h>
  13 #include <linux/of_graph.h>
  14 #include <linux/sys_soc.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/soc/amlogic/meson-canvas.h>
  17
  18 #include <drm/drm_atomic_helper.h>
  19 #include <drm/drm_drv.h>
  20 #include <drm/drm_fb_helper.h>
  21 #include <drm/drm_gem_cma_helper.h>
  22 #include <drm/drm_gem_framebuffer_helper.h>
  23 #include <drm/drm_irq.h>
  24 #include <drm/drm_modeset_helper_vtables.h>
  25 #include <drm/drm_probe_helper.h>
  26 #include <drm/drm_vblank.h>
  27
  28 #include "meson_crtc.h"
  29 #include "meson_drv.h"
  30 #include "meson_overlay.h"
  31 #include "meson_plane.h"
  32 #include "meson_osd_afbcd.h"
  33 #include "meson_registers.h"
  34 #include "meson_venc_cvbs.h"
  35 #include "meson_viu.h"
  36 #include "meson_vpp.h"
  37 #include "meson_rdma.h"
  38
  39 #define DRIVER_NAME "meson"
  40 #define DRIVER_DESC "Amlogic Meson DRM driver"
  41
  42 /**
  43  * DOC: Video Processing Unit
  44  *
  45  * VPU Handles the Global Video Processing, it includes management of the
  46  * clocks gates, blocks reset lines and power domains.
  47  *
  48  * What is missing :
  49  *
  50  * - Full reset of entire video processing HW blocks
  51  * - Scaling and setup of the VPU clock
  52  * - Bus clock gates
  53  * - Powering up video processing HW blocks
  54  * - Powering Up HDMI controller and PHY
  55  */
  56
  57 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
  58         .atomic_check        = drm_atomic_helper_check,
  59         .atomic_commit       = drm_atomic_helper_commit,
  60         .fb_create           = drm_gem_fb_create,
  61 };
  62
  63 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
  64         .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
  65 };
  66
  67 static irqreturn_t meson_irq(int irq, void *arg)
  68 {
  69         struct drm_device *dev = arg;
  70         struct meson_drm *priv = dev->dev_private;
  71
  72         (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
  73
  74         meson_crtc_irq(priv);
  75
  76         return IRQ_HANDLED;
  77 }
  78
  79 static int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
  80                              struct drm_mode_create_dumb *args)
  81 {
  82         /*
  83          * We need 64bytes aligned stride, and PAGE aligned size
  84          */
  85         args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
  86         args->size = PAGE_ALIGN(args->pitch * args->height);
  87
  88         return drm_gem_cma_dumb_create_internal(file, dev, args);
  89 }
  90
  91 DEFINE_DRM_GEM_CMA_FOPS(fops);
  92
  93 static struct drm_driver meson_driver = {
  94         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
  95
  96         /* IRQ */
  97         .irq_handler            = meson_irq,
  98
  99         /* CMA Ops */
 100         DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(meson_dumb_create),
 101
 102         /* Misc */
 103         .fops                   = &fops,
 104         .name                   = DRIVER_NAME,
 105         .desc                   = DRIVER_DESC,
 106         .date                   = "20161109",
 107         .major                  = 1,
 108         .minor                  = 0,
 109 };
 110
 111 static bool meson_vpu_has_available_connectors(struct device *dev)
 112 {
 113         struct device_node *ep, *remote;
 114
 115         /* Parses each endpoint and check if remote exists */
 116         for_each_endpoint_of_node(dev->of_node, ep) {
 117                 /* If the endpoint node exists, consider it enabled */
 118                 remote = of_graph_get_remote_port(ep);
 119                 if (remote) {
 120                         of_node_put(remote);
 121                         of_node_put(ep);
 122                         return true;
 123                 }
 124         }
 125
 126         return false;
 127 }
 128
 129 static struct regmap_config meson_regmap_config = {
 130         .reg_bits       = 32,
 131         .val_bits       = 32,
 132         .reg_stride     = 4,
 133         .max_register   = 0x1000,
 134 };
 135
 136 static void meson_vpu_init(struct meson_drm *priv)
 137 {
 138         u32 value;
 139
 140         /*
 141          * Slave dc0 and dc5 connected to master port 1.
 142          * By default other slaves are connected to master port 0.
 143          */
 144         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1) |
 145                 VPU_RDARB_SLAVE_TO_MASTER_PORT(5, 1);
 146         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 147
 148         /* Slave dc0 connected to master port 1 */
 149         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1);
 150         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 151
 152         /* Slave dc4 and dc7 connected to master port 1 */
 153         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(4, 1) |
 154                 VPU_RDARB_SLAVE_TO_MASTER_PORT(7, 1);
 155         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 156
 157         /* Slave dc1 connected to master port 1 */
 158         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(1, 1);
 159         writel_relaxed(value, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
 160 }
 161
 162 static void meson_remove_framebuffers(void)
 163 {
 164         struct apertures_struct *ap;
 165
 166         ap = alloc_apertures(1);
 167         if (!ap)
 168                 return;
 169
 170         /* The framebuffer can be located anywhere in RAM */
 171         ap->ranges[0].base = 0;
 172         ap->ranges[0].size = ~0;
 173
 174         drm_fb_helper_remove_conflicting_framebuffers(ap, "meson-drm-fb",
 175                                                       false);
 176         kfree(ap);
 177 }
 178
 179 struct meson_drm_soc_attr {
 180         struct meson_drm_soc_limits limits;
 181         const struct soc_device_attribute *attrs;
 182 };
 183
 184 static const struct meson_drm_soc_attr meson_drm_soc_attrs[] = {
 185         /* S805X/S805Y HDMI PLL won't lock for HDMI PHY freq > 1,65GHz */
 186         {
 187                 .limits = {
 188                         .max_hdmi_phy_freq = 1650000,
 189                 },
 190                 .attrs = (const struct soc_device_attribute []) {
 191                         { .soc_id = "GXL (S805*)", },
 192                         { /* sentinel */ },
 193                 }
 194         },
 195 };
 196
 197 static int meson_drv_bind_master(struct device *dev, bool has_components)
 198 {
 199         struct platform_device *pdev = to_platform_device(dev);
 200         const struct meson_drm_match_data *match;
 201         struct meson_drm *priv;
 202         struct drm_device *drm;
 203         struct resource *res;
 204         void __iomem *regs;
 205         int ret, i;
 206
 207         /* Checks if an output connector is available */
 208         if (!meson_vpu_has_available_connectors(dev)) {
 209                 dev_err(dev, "No output connector available\n");
 210                 return -ENODEV;
 211         }
 212
 213         match = of_device_get_match_data(dev);
 214         if (!match)
 215                 return -ENODEV;
 216
 217         drm = drm_dev_alloc(&meson_driver, dev);
 218         if (IS_ERR(drm))
 219                 return PTR_ERR(drm);
 220
 221         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 222         if (!priv) {
 223                 ret = -ENOMEM;
 224                 goto free_drm;
 225         }
 226         drm->dev_private = priv;
 227         priv->drm = drm;
 228         priv->dev = dev;
 229         priv->compat = match->compat;
 230         priv->afbcd.ops = match->afbcd_ops;
 231
 232         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
 233         regs = devm_ioremap_resource(dev, res);
 234         if (IS_ERR(regs)) {
 235                 ret = PTR_ERR(regs);
 236                 goto free_drm;
 237         }
 238
 239         priv->io_base = regs;
 240
 241         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 242         if (!res) {
 243                 ret = -EINVAL;
 244                 goto free_drm;
 245         }
 246         /* Simply ioremap since it may be a shared register zone */
 247         regs = devm_ioremap(dev, res->start, resource_size(res));
 248         if (!regs) {
 249                 ret = -EADDRNOTAVAIL;
 250                 goto free_drm;
 251         }
 252
 253         priv->hhi = devm_regmap_init_mmio(dev, regs,
 254                                           &meson_regmap_config);
 255         if (IS_ERR(priv->hhi)) {
 256                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 257                 ret = PTR_ERR(priv->hhi);
 258                 goto free_drm;
 259         }
 260
 261         priv->canvas = meson_canvas_get(dev);
 262         if (IS_ERR(priv->canvas)) {
 263                 ret = PTR_ERR(priv->canvas);
 264                 goto free_drm;
 265         }
 266
 267         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
 268         if (ret)
 269                 goto free_drm;
 270         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
 271         if (ret) {
 272                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 273                 goto free_drm;
 274         }
 275         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
 276         if (ret) {
 277                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 278                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 279                 goto free_drm;
 280         }
 281         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
 282         if (ret) {
 283                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 284                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 285                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 286                 goto free_drm;
 287         }
 288
 289         priv->vsync_irq = platform_get_irq(pdev, 0);
 290
 291         ret = drm_vblank_init(drm, 1);
 292         if (ret)
 293                 goto free_drm;
 294
 295         /* Assign limits per soc revision/package */
 296         for (i = 0 ; i < ARRAY_SIZE(meson_drm_soc_attrs) ; ++i) {
 297                 if (soc_device_match(meson_drm_soc_attrs[i].attrs)) {
 298                         priv->limits = &meson_drm_soc_attrs[i].limits;
 299                         break;
 300                 }
 301         }
 302
 303         /* Remove early framebuffers (ie. simplefb) */
 304         meson_remove_framebuffers();
 305
 306         ret = drmm_mode_config_init(drm);
 307         if (ret)
 308                 goto free_drm;
 309         drm->mode_config.max_width = 3840;
 310         drm->mode_config.max_height = 2160;
 311         drm->mode_config.funcs = &meson_mode_config_funcs;
 312         drm->mode_config.helper_private = &meson_mode_config_helpers;
 313
 314         /* Hardware Initialization */
 315
 316         meson_vpu_init(priv);
 317         meson_venc_init(priv);
 318         meson_vpp_init(priv);
 319         meson_viu_init(priv);
 320         if (priv->afbcd.ops) {
 321                 ret = priv->afbcd.ops->init(priv);
 322                 if (ret)
 323                         return ret;
 324         }
 325
 326         /* Encoder Initialization */
 327
 328         ret = meson_venc_cvbs_create(priv);
 329         if (ret)
 330                 goto free_drm;
 331
 332         if (has_components) {
 333                 ret = component_bind_all(drm->dev, drm);
 334                 if (ret) {
 335                         dev_err(drm->dev, "Couldn't bind all components\n");
 336                         goto free_drm;
 337                 }
 338         }
 339
 340         ret = meson_plane_create(priv);
 341         if (ret)
 342                 goto free_drm;
 343
 344         ret = meson_overlay_create(priv);
 345         if (ret)
 346                 goto free_drm;
 347
 348         ret = meson_crtc_create(priv);
 349         if (ret)
 350                 goto free_drm;
 351
 352         ret = drm_irq_install(drm, priv->vsync_irq);
 353         if (ret)
 354                 goto free_drm;
 355
 356         drm_mode_config_reset(drm);
 357
 358         drm_kms_helper_poll_init(drm);
 359
 360         platform_set_drvdata(pdev, priv);
 361
 362         ret = drm_dev_register(drm, 0);
 363         if (ret)
 364                 goto uninstall_irq;
 365
 366         drm_fbdev_generic_setup(drm, 32);
 367
 368         return 0;
 369
 370 uninstall_irq:
 371         drm_irq_uninstall(drm);
 372 free_drm:
 373         drm_dev_put(drm);
 374
 375         return ret;
 376 }
 377
 378 static int meson_drv_bind(struct device *dev)
 379 {
 380         return meson_drv_bind_master(dev, true);
 381 }
 382
 383 static void meson_drv_unbind(struct device *dev)
 384 {
 385         struct meson_drm *priv = dev_get_drvdata(dev);
 386         struct drm_device *drm = priv->drm;
 387
 388         if (priv->canvas) {
 389                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 390                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 391                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 392                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 393         }
 394
 395         drm_dev_unregister(drm);
 396         drm_kms_helper_poll_fini(drm);
 397         drm_atomic_helper_shutdown(drm);
 398         component_unbind_all(dev, drm);
 399         drm_irq_uninstall(drm);
 400         drm_dev_put(drm);
 401
 402         if (priv->afbcd.ops)
 403                 priv->afbcd.ops->exit(priv);
 404 }
 405
 406 static const struct component_master_ops meson_drv_master_ops = {
 407         .bind   = meson_drv_bind,
 408         .unbind = meson_drv_unbind,
 409 };
 410
 411 static int __maybe_unused meson_drv_pm_suspend(struct device *dev)
 412 {
 413         struct meson_drm *priv = dev_get_drvdata(dev);
 414
 415         if (!priv)
 416                 return 0;
 417
 418         return drm_mode_config_helper_suspend(priv->drm);
 419 }
 420
 421 static int __maybe_unused meson_drv_pm_resume(struct device *dev)
 422 {
 423         struct meson_drm *priv = dev_get_drvdata(dev);
 424
 425         if (!priv)
 426                 return 0;
 427
 428         meson_vpu_init(priv);
 429         meson_venc_init(priv);
 430         meson_vpp_init(priv);
 431         meson_viu_init(priv);
 432         if (priv->afbcd.ops)
 433                 priv->afbcd.ops->init(priv);
 434
 435         return drm_mode_config_helper_resume(priv->drm);
 436 }
 437
 438 static int compare_of(struct device *dev, void *data)
 439 {
 440         DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
 441                          dev->of_node, data);
 442
 443         return dev->of_node == data;
 444 }
 445
 446 /* Possible connectors nodes to ignore */
 447 static const struct of_device_id connectors_match[] = {
 448         { .compatible = "composite-video-connector" },
 449         { .compatible = "svideo-connector" },
 450         { .compatible = "hdmi-connector" },
 451         { .compatible = "dvi-connector" },
 452         {}
 453 };
 454
 455 static int meson_probe_remote(struct platform_device *pdev,
 456                               struct component_match **match,
 457                               struct device_node *parent,
 458                               struct device_node *remote)
 459 {
 460         struct device_node *ep, *remote_node;
 461         int count = 1;
 462
 463         /* If node is a connector, return and do not add to match table */
 464         if (of_match_node(connectors_match, remote))
 465                 return 1;
 466
 467         component_match_add(&pdev->dev, match, compare_of, remote);
 468
 469         for_each_endpoint_of_node(remote, ep) {
 470                 remote_node = of_graph_get_remote_port_parent(ep);
 471                 if (!remote_node ||
 472                     remote_node == parent || /* Ignore parent endpoint */
 473                     !of_device_is_available(remote_node)) {
 474                         of_node_put(remote_node);
 475                         continue;
 476                 }
 477
 478                 count += meson_probe_remote(pdev, match, remote, remote_node);
 479
 480                 of_node_put(remote_node);
 481         }
 482
 483         return count;
 484 }
 485
 486 static void meson_drv_shutdown(struct platform_device *pdev)
 487 {
 488         struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
 489
 490         if (!priv)
 491                 return;
 492
 493         drm_kms_helper_poll_fini(priv->drm);
 494         drm_atomic_helper_shutdown(priv->drm);
 495 }
 496
 497 static int meson_drv_probe(struct platform_device *pdev)
 498 {
 499         struct component_match *match = NULL;
 500         struct device_node *np = pdev->dev.of_node;
 501         struct device_node *ep, *remote;
 502         int count = 0;
 503
 504         for_each_endpoint_of_node(np, ep) {
 505                 remote = of_graph_get_remote_port_parent(ep);
 506                 if (!remote || !of_device_is_available(remote)) {
 507                         of_node_put(remote);
 508                         continue;
 509                 }
 510
 511                 count += meson_probe_remote(pdev, &match, np, remote);
 512                 of_node_put(remote);
 513         }
 514
 515         if (count && !match)
 516                 return meson_drv_bind_master(&pdev->dev, false);
 517
 518         /* If some endpoints were found, initialize the nodes */
 519         if (count) {
 520                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 521
 522                 return component_master_add_with_match(&pdev->dev,
 523                                                        &meson_drv_master_ops,
 524                                                        match);
 525         }
 526
 527         /* If no output endpoints were available, simply bail out */
 528         return 0;
 529 };
 530
 531 static int meson_drv_remove(struct platform_device *pdev)
 532 {
 533         component_master_del(&pdev->dev, &meson_drv_master_ops);
 534
 535         return 0;
 536 }
 537
 538 static struct meson_drm_match_data meson_drm_gxbb_data = {
 539         .compat = VPU_COMPATIBLE_GXBB,
 540 };
 541
 542 static struct meson_drm_match_data meson_drm_gxl_data = {
 543         .compat = VPU_COMPATIBLE_GXL,
 544 };
 545
 546 static struct meson_drm_match_data meson_drm_gxm_data = {
 547         .compat = VPU_COMPATIBLE_GXM,
 548         .afbcd_ops = &meson_afbcd_gxm_ops,
 549 };
 550
 551 static struct meson_drm_match_data meson_drm_g12a_data = {
 552         .compat = VPU_COMPATIBLE_G12A,
 553         .afbcd_ops = &meson_afbcd_g12a_ops,
 554 };
 555
 556 static const struct of_device_id dt_match[] = {
 557         { .compatible = "amlogic,meson-gxbb-vpu",
 558           .data       = (void *)&meson_drm_gxbb_data },
 559         { .compatible = "amlogic,meson-gxl-vpu",
 560           .data       = (void *)&meson_drm_gxl_data },
 561         { .compatible = "amlogic,meson-gxm-vpu",
 562           .data       = (void *)&meson_drm_gxm_data },
 563         { .compatible = "amlogic,meson-g12a-vpu",
 564           .data       = (void *)&meson_drm_g12a_data },
 565         {}
 566 };
 567 MODULE_DEVICE_TABLE(of, dt_match);
 568
 569 static const struct dev_pm_ops meson_drv_pm_ops = {
 570         SET_SYSTEM_SLEEP_PM_OPS(meson_drv_pm_suspend, meson_drv_pm_resume)
 571 };
 572
 573 static struct platform_driver meson_drm_platform_driver = {
 574         .probe      = meson_drv_probe,
 575         .remove     = meson_drv_remove,
 576         .shutdown   = meson_drv_shutdown,
 577         .driver     = {
 578                 .name   = "meson-drm",
 579                 .of_match_table = dt_match,
 580                 .pm = &meson_drv_pm_ops,
 581         },
 582 };
 583
 584 module_platform_driver(meson_drm_platform_driver);
 585
 586 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
 587 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
 588 MODULE_DESCRIPTION(DRIVER_DESC);
 589 MODULE_LICENSE("GPL");