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