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         regs = devm_platform_ioremap_resource_byname(pdev, "vpu");
 210         if (IS_ERR(regs)) {
 211                 ret = PTR_ERR(regs);
 212                 goto free_drm;
 213         }
 214
 215         priv->io_base = regs;
 216
 217         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 218         if (!res) {
 219                 ret = -EINVAL;
 220                 goto free_drm;
 221         }
 222         /* Simply ioremap since it may be a shared register zone */
 223         regs = devm_ioremap(dev, res->start, resource_size(res));
 224         if (!regs) {
 225                 ret = -EADDRNOTAVAIL;
 226                 goto free_drm;
 227         }
 228
 229         priv->hhi = devm_regmap_init_mmio(dev, regs,
 230                                           &meson_regmap_config);
 231         if (IS_ERR(priv->hhi)) {
 232                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 233                 ret = PTR_ERR(priv->hhi);
 234                 goto free_drm;
 235         }
 236
 237         priv->canvas = meson_canvas_get(dev);
 238         if (IS_ERR(priv->canvas)) {
 239                 ret = PTR_ERR(priv->canvas);
 240                 goto free_drm;
 241         }
 242
 243         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
 244         if (ret)
 245                 goto free_drm;
 246         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
 247         if (ret) {
 248                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 249                 goto free_drm;
 250         }
 251         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
 252         if (ret) {
 253                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 254                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 255                 goto free_drm;
 256         }
 257         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
 258         if (ret) {
 259                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 260                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 261                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 262                 goto free_drm;
 263         }
 264
 265         priv->vsync_irq = platform_get_irq(pdev, 0);
 266
 267         ret = drm_vblank_init(drm, 1);
 268         if (ret)
 269                 goto free_drm;
 270
 271         /* Assign limits per soc revision/package */
 272         for (i = 0 ; i < ARRAY_SIZE(meson_drm_soc_attrs) ; ++i) {
 273                 if (soc_device_match(meson_drm_soc_attrs[i].attrs)) {
 274                         priv->limits = &meson_drm_soc_attrs[i].limits;
 275                         break;
 276                 }
 277         }
 278
 279         /*
 280          * Remove early framebuffers (ie. simplefb). The framebuffer can be
 281          * located anywhere in RAM
 282          */
 283         ret = drm_aperture_remove_framebuffers(false, &meson_driver);
 284         if (ret)
 285                 goto free_drm;
 286
 287         ret = drmm_mode_config_init(drm);
 288         if (ret)
 289                 goto free_drm;
 290         drm->mode_config.max_width = 3840;
 291         drm->mode_config.max_height = 2160;
 292         drm->mode_config.funcs = &meson_mode_config_funcs;
 293         drm->mode_config.helper_private = &meson_mode_config_helpers;
 294
 295         /* Hardware Initialization */
 296
 297         meson_vpu_init(priv);
 298         meson_venc_init(priv);
 299         meson_vpp_init(priv);
 300         meson_viu_init(priv);
 301         if (priv->afbcd.ops) {
 302                 ret = priv->afbcd.ops->init(priv);
 303                 if (ret)
 304                         return ret;
 305         }
 306
 307         /* Encoder Initialization */
 308
 309         ret = meson_venc_cvbs_create(priv);
 310         if (ret)
 311                 goto free_drm;
 312
 313         if (has_components) {
 314                 ret = component_bind_all(drm->dev, drm);
 315                 if (ret) {
 316                         dev_err(drm->dev, "Couldn't bind all components\n");
 317                         goto free_drm;
 318                 }
 319         }
 320
 321         ret = meson_plane_create(priv);
 322         if (ret)
 323                 goto free_drm;
 324
 325         ret = meson_overlay_create(priv);
 326         if (ret)
 327                 goto free_drm;
 328
 329         ret = meson_crtc_create(priv);
 330         if (ret)
 331                 goto free_drm;
 332
 333         ret = request_irq(priv->vsync_irq, meson_irq, 0, drm->driver->name, drm);
 334         if (ret)
 335                 goto free_drm;
 336
 337         drm_mode_config_reset(drm);
 338
 339         drm_kms_helper_poll_init(drm);
 340
 341         platform_set_drvdata(pdev, priv);
 342
 343         ret = drm_dev_register(drm, 0);
 344         if (ret)
 345                 goto uninstall_irq;
 346
 347         drm_fbdev_generic_setup(drm, 32);
 348
 349         return 0;
 350
 351 uninstall_irq:
 352         free_irq(priv->vsync_irq, drm);
 353 free_drm:
 354         drm_dev_put(drm);
 355
 356         return ret;
 357 }
 358
 359 static int meson_drv_bind(struct device *dev)
 360 {
 361         return meson_drv_bind_master(dev, true);
 362 }
 363
 364 static void meson_drv_unbind(struct device *dev)
 365 {
 366         struct meson_drm *priv = dev_get_drvdata(dev);
 367         struct drm_device *drm = priv->drm;
 368
 369         if (priv->canvas) {
 370                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 371                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 372                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 373                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 374         }
 375
 376         drm_dev_unregister(drm);
 377         drm_kms_helper_poll_fini(drm);
 378         drm_atomic_helper_shutdown(drm);
 379         component_unbind_all(dev, drm);
 380         free_irq(priv->vsync_irq, drm);
 381         drm_dev_put(drm);
 382
 383         if (priv->afbcd.ops) {
 384                 priv->afbcd.ops->reset(priv);
 385                 meson_rdma_free(priv);
 386         }
 387 }
 388
 389 static const struct component_master_ops meson_drv_master_ops = {
 390         .bind   = meson_drv_bind,
 391         .unbind = meson_drv_unbind,
 392 };
 393
 394 static int __maybe_unused meson_drv_pm_suspend(struct device *dev)
 395 {
 396         struct meson_drm *priv = dev_get_drvdata(dev);
 397
 398         if (!priv)
 399                 return 0;
 400
 401         return drm_mode_config_helper_suspend(priv->drm);
 402 }
 403
 404 static int __maybe_unused meson_drv_pm_resume(struct device *dev)
 405 {
 406         struct meson_drm *priv = dev_get_drvdata(dev);
 407
 408         if (!priv)
 409                 return 0;
 410
 411         meson_vpu_init(priv);
 412         meson_venc_init(priv);
 413         meson_vpp_init(priv);
 414         meson_viu_init(priv);
 415         if (priv->afbcd.ops)
 416                 priv->afbcd.ops->init(priv);
 417
 418         return drm_mode_config_helper_resume(priv->drm);
 419 }
 420
 421 static int compare_of(struct device *dev, void *data)
 422 {
 423         DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
 424                          dev->of_node, data);
 425
 426         return dev->of_node == data;
 427 }
 428
 429 /* Possible connectors nodes to ignore */
 430 static const struct of_device_id connectors_match[] = {
 431         { .compatible = "composite-video-connector" },
 432         { .compatible = "svideo-connector" },
 433         { .compatible = "hdmi-connector" },
 434         { .compatible = "dvi-connector" },
 435         {}
 436 };
 437
 438 static int meson_probe_remote(struct platform_device *pdev,
 439                               struct component_match **match,
 440                               struct device_node *parent,
 441                               struct device_node *remote)
 442 {
 443         struct device_node *ep, *remote_node;
 444         int count = 1;
 445
 446         /* If node is a connector, return and do not add to match table */
 447         if (of_match_node(connectors_match, remote))
 448                 return 1;
 449
 450         component_match_add(&pdev->dev, match, compare_of, remote);
 451
 452         for_each_endpoint_of_node(remote, ep) {
 453                 remote_node = of_graph_get_remote_port_parent(ep);
 454                 if (!remote_node ||
 455                     remote_node == parent || /* Ignore parent endpoint */
 456                     !of_device_is_available(remote_node)) {
 457                         of_node_put(remote_node);
 458                         continue;
 459                 }
 460
 461                 count += meson_probe_remote(pdev, match, remote, remote_node);
 462
 463                 of_node_put(remote_node);
 464         }
 465
 466         return count;
 467 }
 468
 469 static void meson_drv_shutdown(struct platform_device *pdev)
 470 {
 471         struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
 472
 473         if (!priv)
 474                 return;
 475
 476         drm_kms_helper_poll_fini(priv->drm);
 477         drm_atomic_helper_shutdown(priv->drm);
 478 }
 479
 480 static int meson_drv_probe(struct platform_device *pdev)
 481 {
 482         struct component_match *match = NULL;
 483         struct device_node *np = pdev->dev.of_node;
 484         struct device_node *ep, *remote;
 485         int count = 0;
 486
 487         for_each_endpoint_of_node(np, ep) {
 488                 remote = of_graph_get_remote_port_parent(ep);
 489                 if (!remote || !of_device_is_available(remote)) {
 490                         of_node_put(remote);
 491                         continue;
 492                 }
 493
 494                 count += meson_probe_remote(pdev, &match, np, remote);
 495                 of_node_put(remote);
 496         }
 497
 498         if (count && !match)
 499                 return meson_drv_bind_master(&pdev->dev, false);
 500
 501         /* If some endpoints were found, initialize the nodes */
 502         if (count) {
 503                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 504
 505                 return component_master_add_with_match(&pdev->dev,
 506                                                        &meson_drv_master_ops,
 507                                                        match);
 508         }
 509
 510         /* If no output endpoints were available, simply bail out */
 511         return 0;
 512 };
 513
 514 static struct meson_drm_match_data meson_drm_gxbb_data = {
 515         .compat = VPU_COMPATIBLE_GXBB,
 516 };
 517
 518 static struct meson_drm_match_data meson_drm_gxl_data = {
 519         .compat = VPU_COMPATIBLE_GXL,
 520 };
 521
 522 static struct meson_drm_match_data meson_drm_gxm_data = {
 523         .compat = VPU_COMPATIBLE_GXM,
 524         .afbcd_ops = &meson_afbcd_gxm_ops,
 525 };
 526
 527 static struct meson_drm_match_data meson_drm_g12a_data = {
 528         .compat = VPU_COMPATIBLE_G12A,
 529         .afbcd_ops = &meson_afbcd_g12a_ops,
 530 };
 531
 532 static const struct of_device_id dt_match[] = {
 533         { .compatible = "amlogic,meson-gxbb-vpu",
 534           .data       = (void *)&meson_drm_gxbb_data },
 535         { .compatible = "amlogic,meson-gxl-vpu",
 536           .data       = (void *)&meson_drm_gxl_data },
 537         { .compatible = "amlogic,meson-gxm-vpu",
 538           .data       = (void *)&meson_drm_gxm_data },
 539         { .compatible = "amlogic,meson-g12a-vpu",
 540           .data       = (void *)&meson_drm_g12a_data },
 541         {}
 542 };
 543 MODULE_DEVICE_TABLE(of, dt_match);
 544
 545 static const struct dev_pm_ops meson_drv_pm_ops = {
 546         SET_SYSTEM_SLEEP_PM_OPS(meson_drv_pm_suspend, meson_drv_pm_resume)
 547 };
 548
 549 static struct platform_driver meson_drm_platform_driver = {
 550         .probe      = meson_drv_probe,
 551         .shutdown   = meson_drv_shutdown,
 552         .driver     = {
 553                 .name   = "meson-drm",
 554                 .of_match_table = dt_match,
 555                 .pm = &meson_drv_pm_ops,
 556         },
 557 };
 558
 559 module_platform_driver(meson_drm_platform_driver);
 560
 561 MODULE_AUTHOR("Jasper St. Pierre <[email protected]>");
 562 MODULE_AUTHOR("Neil Armstrong <[email protected]>");
 563 MODULE_DESCRIPTION(DRIVER_DESC);
 564 MODULE_LICENSE("GPL");