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 <[email protected]>
   5  * Copyright (C) 2014 Endless Mobile
   6  *
   7  * Written by:
   8  *     Jasper St. Pierre <[email protected]>
   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_aperture.h>
  19 #include <drm/drm_atomic_helper.h>
  20 #include <drm/drm_drv.h>
  21 #include <drm/drm_fb_helper.h>
  22 #include <drm/drm_gem_cma_helper.h>
  23 #include <drm/drm_gem_framebuffer_helper.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 const struct drm_driver meson_driver = {
  94         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
  95
  96         /* CMA Ops */
  97         DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(meson_dumb_create),
  98
  99         /* Misc */
 100         .fops                   = &fops,
 101         .name                   = DRIVER_NAME,
 102         .desc                   = DRIVER_DESC,
 103         .date                   = "20161109",
 104         .major                  = 1,
 105         .minor                  = 0,
 106 };
 107
 108 static bool meson_vpu_has_available_connectors(struct device *dev)
 109 {
 110         struct device_node *ep, *remote;
 111
 112         /* Parses each endpoint and check if remote exists */
 113         for_each_endpoint_of_node(dev->of_node, ep) {
 114                 /* If the endpoint node exists, consider it enabled */
 115                 remote = of_graph_get_remote_port(ep);
 116                 if (remote)
 117                         return true;
 118         }
 119
 120         return false;
 121 }
 122
 123 static struct regmap_config meson_regmap_config = {
 124         .reg_bits       = 32,
 125         .val_bits       = 32,
 126         .reg_stride     = 4,
 127         .max_register   = 0x1000,
 128 };
 129
 130 static void meson_vpu_init(struct meson_drm *priv)
 131 {
 132         u32 value;
 133
 134         /*
 135          * Slave dc0 and dc5 connected to master port 1.
 136          * By default other slaves are connected to master port 0.
 137          */
 138         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1) |
 139                 VPU_RDARB_SLAVE_TO_MASTER_PORT(5, 1);
 140         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 141
 142         /* Slave dc0 connected to master port 1 */
 143         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1);
 144         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 145
 146         /* Slave dc4 and dc7 connected to master port 1 */
 147         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(4, 1) |
 148                 VPU_RDARB_SLAVE_TO_MASTER_PORT(7, 1);
 149         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 150
 151         /* Slave dc1 connected to master port 1 */
 152         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(1, 1);
 153         writel_relaxed(value, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
 154 }
 155
 156 struct meson_drm_soc_attr {
 157         struct meson_drm_soc_limits limits;
 158         const struct soc_device_attribute *attrs;
 159 };
 160
 161 static const struct meson_drm_soc_attr meson_drm_soc_attrs[] = {
 162         /* S805X/S805Y HDMI PLL won't lock for HDMI PHY freq > 1,65GHz */
 163         {
 164                 .limits = {
 165                         .max_hdmi_phy_freq = 1650000,
 166                 },
 167                 .attrs = (const struct soc_device_attribute []) {
 168                         { .soc_id = "GXL (S805*)", },
 169                         { /* sentinel */ },
 170                 }
 171         },
 172 };
 173
 174 static int meson_drv_bind_master(struct device *dev, bool has_components)
 175 {
 176         struct platform_device *pdev = to_platform_device(dev);
 177         const struct meson_drm_match_data *match;
 178         struct meson_drm *priv;
 179         struct drm_device *drm;
 180         struct resource *res;
 181         void __iomem *regs;
 182         int ret, i;
 183
 184         /* Checks if an output connector is available */
 185         if (!meson_vpu_has_available_connectors(dev)) {
 186                 dev_err(dev, "No output connector available\n");
 187                 return -ENODEV;
 188         }
 189
 190         match = of_device_get_match_data(dev);
 191         if (!match)
 192                 return -ENODEV;
 193
 194         drm = drm_dev_alloc(&meson_driver, dev);
 195         if (IS_ERR(drm))
 196                 return PTR_ERR(drm);
 197
 198         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 199         if (!priv) {
 200                 ret = -ENOMEM;
 201                 goto free_drm;
 202         }
 203         drm->dev_private = priv;
 204         priv->drm = drm;
 205         priv->dev = dev;
 206         priv->compat = match->compat;
 207         priv->afbcd.ops = match->afbcd_ops;
 208
 209         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
 210         regs = devm_ioremap_resource(dev, res);
 211         if (IS_ERR(regs)) {
 212                 ret = PTR_ERR(regs);
 213                 goto free_drm;
 214         }
 215
 216         priv->io_base = regs;
 217
 218         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 219         if (!res) {
 220                 ret = -EINVAL;
 221                 goto free_drm;
 222         }
 223         /* Simply ioremap since it may be a shared register zone */
 224         regs = devm_ioremap(dev, res->start, resource_size(res));
 225         if (!regs) {
 226                 ret = -EADDRNOTAVAIL;
 227                 goto free_drm;
 228         }
 229
 230         priv->hhi = devm_regmap_init_mmio(dev, regs,
 231                                           &meson_regmap_config);
 232         if (IS_ERR(priv->hhi)) {
 233                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 234                 ret = PTR_ERR(priv->hhi);
 235                 goto free_drm;
 236         }
 237
 238         priv->canvas = meson_canvas_get(dev);
 239         if (IS_ERR(priv->canvas)) {
 240                 ret = PTR_ERR(priv->canvas);
 241                 goto free_drm;
 242         }
 243
 244         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
 245         if (ret)
 246                 goto free_drm;
 247         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
 248         if (ret) {
 249                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 250                 goto free_drm;
 251         }
 252         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
 253         if (ret) {
 254                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 255                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 256                 goto free_drm;
 257         }
 258         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
 259         if (ret) {
 260                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 261                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 262                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 263                 goto free_drm;
 264         }
 265
 266         priv->vsync_irq = platform_get_irq(pdev, 0);
 267
 268         ret = drm_vblank_init(drm, 1);
 269         if (ret)
 270                 goto free_drm;
 271
 272         /* Assign limits per soc revision/package */
 273         for (i = 0 ; i < ARRAY_SIZE(meson_drm_soc_attrs) ; ++i) {
 274                 if (soc_device_match(meson_drm_soc_attrs[i].attrs)) {
 275                         priv->limits = &meson_drm_soc_attrs[i].limits;
 276                         break;
 277                 }
 278         }
 279
 280         /*
 281          * Remove early framebuffers (ie. simplefb). The framebuffer can be
 282          * located anywhere in RAM
 283          */
 284         ret = drm_aperture_remove_framebuffers(false, &meson_driver);
 285         if (ret)
 286                 goto free_drm;
 287
 288         ret = drmm_mode_config_init(drm);
 289         if (ret)
 290                 goto free_drm;
 291         drm->mode_config.max_width = 3840;
 292         drm->mode_config.max_height = 2160;
 293         drm->mode_config.funcs = &meson_mode_config_funcs;
 294         drm->mode_config.helper_private = &meson_mode_config_helpers;
 295
 296         /* Hardware Initialization */
 297
 298         meson_vpu_init(priv);
 299         meson_venc_init(priv);
 300         meson_vpp_init(priv);
 301         meson_viu_init(priv);
 302         if (priv->afbcd.ops) {
 303                 ret = priv->afbcd.ops->init(priv);
 304                 if (ret)
 305                         return ret;
 306         }
 307
 308         /* Encoder Initialization */
 309
 310         ret = meson_venc_cvbs_create(priv);
 311         if (ret)
 312                 goto free_drm;
 313
 314         if (has_components) {
 315                 ret = component_bind_all(drm->dev, drm);
 316                 if (ret) {
 317                         dev_err(drm->dev, "Couldn't bind all components\n");
 318                         goto free_drm;
 319                 }
 320         }
 321
 322         ret = meson_plane_create(priv);
 323         if (ret)
 324                 goto free_drm;
 325
 326         ret = meson_overlay_create(priv);
 327         if (ret)
 328                 goto free_drm;
 329
 330         ret = meson_crtc_create(priv);
 331         if (ret)
 332                 goto free_drm;
 333
 334         ret = request_irq(priv->vsync_irq, meson_irq, 0, drm->driver->name, drm);
 335         if (ret)
 336                 goto free_drm;
 337
 338         drm_mode_config_reset(drm);
 339
 340         drm_kms_helper_poll_init(drm);
 341
 342         platform_set_drvdata(pdev, priv);
 343
 344         ret = drm_dev_register(drm, 0);
 345         if (ret)
 346                 goto uninstall_irq;
 347
 348         drm_fbdev_generic_setup(drm, 32);
 349
 350         return 0;
 351
 352 uninstall_irq:
 353         free_irq(priv->vsync_irq, drm);
 354 free_drm:
 355         drm_dev_put(drm);
 356
 357         return ret;
 358 }
 359
 360 static int meson_drv_bind(struct device *dev)
 361 {
 362         return meson_drv_bind_master(dev, true);
 363 }
 364
 365 static void meson_drv_unbind(struct device *dev)
 366 {
 367         struct meson_drm *priv = dev_get_drvdata(dev);
 368         struct drm_device *drm = priv->drm;
 369
 370         if (priv->canvas) {
 371                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 372                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 373                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 374                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 375         }
 376
 377         drm_dev_unregister(drm);
 378         drm_kms_helper_poll_fini(drm);
 379         drm_atomic_helper_shutdown(drm);
 380         component_unbind_all(dev, drm);
 381         free_irq(priv->vsync_irq, drm);
 382         drm_dev_put(drm);
 383
 384         if (priv->afbcd.ops) {
 385                 priv->afbcd.ops->reset(priv);
 386                 meson_rdma_free(priv);
 387         }
 388 }
 389
 390 static const struct component_master_ops meson_drv_master_ops = {
 391         .bind   = meson_drv_bind,
 392         .unbind = meson_drv_unbind,
 393 };
 394
 395 static int __maybe_unused meson_drv_pm_suspend(struct device *dev)
 396 {
 397         struct meson_drm *priv = dev_get_drvdata(dev);
 398
 399         if (!priv)
 400                 return 0;
 401
 402         return drm_mode_config_helper_suspend(priv->drm);
 403 }
 404
 405 static int __maybe_unused meson_drv_pm_resume(struct device *dev)
 406 {
 407         struct meson_drm *priv = dev_get_drvdata(dev);
 408
 409         if (!priv)
 410                 return 0;
 411
 412         meson_vpu_init(priv);
 413         meson_venc_init(priv);
 414         meson_vpp_init(priv);
 415         meson_viu_init(priv);
 416         if (priv->afbcd.ops)
 417                 priv->afbcd.ops->init(priv);
 418
 419         return drm_mode_config_helper_resume(priv->drm);
 420 }
 421
 422 static int compare_of(struct device *dev, void *data)
 423 {
 424         DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
 425                          dev->of_node, data);
 426
 427         return dev->of_node == data;
 428 }
 429
 430 /* Possible connectors nodes to ignore */
 431 static const struct of_device_id connectors_match[] = {
 432         { .compatible = "composite-video-connector" },
 433         { .compatible = "svideo-connector" },
 434         { .compatible = "hdmi-connector" },
 435         { .compatible = "dvi-connector" },
 436         {}
 437 };
 438
 439 static int meson_probe_remote(struct platform_device *pdev,
 440                               struct component_match **match,
 441                               struct device_node *parent,
 442                               struct device_node *remote)
 443 {
 444         struct device_node *ep, *remote_node;
 445         int count = 1;
 446
 447         /* If node is a connector, return and do not add to match table */
 448         if (of_match_node(connectors_match, remote))
 449                 return 1;
 450
 451         component_match_add(&pdev->dev, match, compare_of, remote);
 452
 453         for_each_endpoint_of_node(remote, ep) {
 454                 remote_node = of_graph_get_remote_port_parent(ep);
 455                 if (!remote_node ||
 456                     remote_node == parent || /* Ignore parent endpoint */
 457                     !of_device_is_available(remote_node)) {
 458                         of_node_put(remote_node);
 459                         continue;
 460                 }
 461
 462                 count += meson_probe_remote(pdev, match, remote, remote_node);
 463
 464                 of_node_put(remote_node);
 465         }
 466
 467         return count;
 468 }
 469
 470 static void meson_drv_shutdown(struct platform_device *pdev)
 471 {
 472         struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
 473
 474         if (!priv)
 475                 return;
 476
 477         drm_kms_helper_poll_fini(priv->drm);
 478         drm_atomic_helper_shutdown(priv->drm);
 479 }
 480
 481 static int meson_drv_probe(struct platform_device *pdev)
 482 {
 483         struct component_match *match = NULL;
 484         struct device_node *np = pdev->dev.of_node;
 485         struct device_node *ep, *remote;
 486         int count = 0;
 487
 488         for_each_endpoint_of_node(np, ep) {
 489                 remote = of_graph_get_remote_port_parent(ep);
 490                 if (!remote || !of_device_is_available(remote)) {
 491                         of_node_put(remote);
 492                         continue;
 493                 }
 494
 495                 count += meson_probe_remote(pdev, &match, np, remote);
 496                 of_node_put(remote);
 497         }
 498
 499         if (count && !match)
 500                 return meson_drv_bind_master(&pdev->dev, false);
 501
 502         /* If some endpoints were found, initialize the nodes */
 503         if (count) {
 504                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 505
 506                 return component_master_add_with_match(&pdev->dev,
 507                                                        &meson_drv_master_ops,
 508                                                        match);
 509         }
 510
 511         /* If no output endpoints were available, simply bail out */
 512         return 0;
 513 };
 514
 515 static struct meson_drm_match_data meson_drm_gxbb_data = {
 516         .compat = VPU_COMPATIBLE_GXBB,
 517 };
 518
 519 static struct meson_drm_match_data meson_drm_gxl_data = {
 520         .compat = VPU_COMPATIBLE_GXL,
 521 };
 522
 523 static struct meson_drm_match_data meson_drm_gxm_data = {
 524         .compat = VPU_COMPATIBLE_GXM,
 525         .afbcd_ops = &meson_afbcd_gxm_ops,
 526 };
 527
 528 static struct meson_drm_match_data meson_drm_g12a_data = {
 529         .compat = VPU_COMPATIBLE_G12A,
 530         .afbcd_ops = &meson_afbcd_g12a_ops,
 531 };
 532
 533 static const struct of_device_id dt_match[] = {
 534         { .compatible = "amlogic,meson-gxbb-vpu",
 535           .data       = (void *)&meson_drm_gxbb_data },
 536         { .compatible = "amlogic,meson-gxl-vpu",
 537           .data       = (void *)&meson_drm_gxl_data },
 538         { .compatible = "amlogic,meson-gxm-vpu",
 539           .data       = (void *)&meson_drm_gxm_data },
 540         { .compatible = "amlogic,meson-g12a-vpu",
 541           .data       = (void *)&meson_drm_g12a_data },
 542         {}
 543 };
 544 MODULE_DEVICE_TABLE(of, dt_match);
 545
 546 static const struct dev_pm_ops meson_drv_pm_ops = {
 547         SET_SYSTEM_SLEEP_PM_OPS(meson_drv_pm_suspend, meson_drv_pm_resume)
 548 };
 549
 550 static struct platform_driver meson_drm_platform_driver = {
 551         .probe      = meson_drv_probe,
 552         .shutdown   = meson_drv_shutdown,
 553         .driver     = {
 554                 .name   = "meson-drm",
 555                 .of_match_table = dt_match,
 556                 .pm = &meson_drv_pm_ops,
 557         },
 558 };
 559
 560 module_platform_driver(meson_drm_platform_driver);
 561
 562 MODULE_AUTHOR("Jasper St. Pierre <[email protected]>");
 563 MODULE_AUTHOR("Neil Armstrong <[email protected]>");
 564 MODULE_DESCRIPTION(DRIVER_DESC);
 565 MODULE_LICENSE("GPL");