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/aperture.h>
  12 #include <linux/component.h>
  13 #include <linux/module.h>
  14 #include <linux/of_graph.h>
  15 #include <linux/sys_soc.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/soc/amlogic/meson-canvas.h>
  18
  19 #include <drm/drm_atomic_helper.h>
  20 #include <drm/drm_client_setup.h>
  21 #include <drm/drm_drv.h>
  22 #include <drm/drm_fbdev_dma.h>
  23 #include <drm/drm_gem_dma_helper.h>
  24 #include <drm/drm_gem_framebuffer_helper.h>
  25 #include <drm/drm_modeset_helper_vtables.h>
  26 #include <drm/drm_module.h>
  27 #include <drm/drm_probe_helper.h>
  28 #include <drm/drm_vblank.h>
  29
  30 #include "meson_crtc.h"
  31 #include "meson_drv.h"
  32 #include "meson_overlay.h"
  33 #include "meson_plane.h"
  34 #include "meson_osd_afbcd.h"
  35 #include "meson_registers.h"
  36 #include "meson_encoder_cvbs.h"
  37 #include "meson_encoder_hdmi.h"
  38 #include "meson_encoder_dsi.h"
  39 #include "meson_viu.h"
  40 #include "meson_vpp.h"
  41 #include "meson_rdma.h"
  42
  43 #define DRIVER_NAME "meson"
  44 #define DRIVER_DESC "Amlogic Meson DRM driver"
  45
  46 /**
  47  * DOC: Video Processing Unit
  48  *
  49  * VPU Handles the Global Video Processing, it includes management of the
  50  * clocks gates, blocks reset lines and power domains.
  51  *
  52  * What is missing :
  53  *
  54  * - Full reset of entire video processing HW blocks
  55  * - Scaling and setup of the VPU clock
  56  * - Bus clock gates
  57  * - Powering up video processing HW blocks
  58  * - Powering Up HDMI controller and PHY
  59  */
  60
  61 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
  62         .atomic_check        = drm_atomic_helper_check,
  63         .atomic_commit       = drm_atomic_helper_commit,
  64         .fb_create           = drm_gem_fb_create,
  65 };
  66
  67 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
  68         .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
  69 };
  70
  71 static irqreturn_t meson_irq(int irq, void *arg)
  72 {
  73         struct drm_device *dev = arg;
  74         struct meson_drm *priv = dev->dev_private;
  75
  76         (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
  77
  78         meson_crtc_irq(priv);
  79
  80         return IRQ_HANDLED;
  81 }
  82
  83 static int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
  84                              struct drm_mode_create_dumb *args)
  85 {
  86         /*
  87          * We need 64bytes aligned stride, and PAGE aligned size
  88          */
  89         args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
  90         args->size = PAGE_ALIGN(args->pitch * args->height);
  91
  92         return drm_gem_dma_dumb_create_internal(file, dev, args);
  93 }
  94
  95 DEFINE_DRM_GEM_DMA_FOPS(fops);
  96
  97 static const struct drm_driver meson_driver = {
  98         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
  99
 100         /* DMA Ops */
 101         DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(meson_dumb_create),
 102         DRM_FBDEV_DMA_DRIVER_OPS,
 103
 104         /* Misc */
 105         .fops                   = &fops,
 106         .name                   = DRIVER_NAME,
 107         .desc                   = DRIVER_DESC,
 108         .date                   = "20161109",
 109         .major                  = 1,
 110         .minor                  = 0,
 111 };
 112
 113 static bool meson_vpu_has_available_connectors(struct device *dev)
 114 {
 115         struct device_node *ep, *remote;
 116
 117         /* Parses each endpoint and check if remote exists */
 118         for_each_endpoint_of_node(dev->of_node, ep) {
 119                 /* If the endpoint node exists, consider it enabled */
 120                 remote = of_graph_get_remote_port(ep);
 121                 if (remote) {
 122                         of_node_put(remote);
 123                         of_node_put(ep);
 124                         return true;
 125                 }
 126         }
 127
 128         return false;
 129 }
 130
 131 static const struct regmap_config meson_regmap_config = {
 132         .reg_bits       = 32,
 133         .val_bits       = 32,
 134         .reg_stride     = 4,
 135         .max_register   = 0x1000,
 136 };
 137
 138 static void meson_vpu_init(struct meson_drm *priv)
 139 {
 140         u32 value;
 141
 142         /*
 143          * Slave dc0 and dc5 connected to master port 1.
 144          * By default other slaves are connected to master port 0.
 145          */
 146         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1) |
 147                 VPU_RDARB_SLAVE_TO_MASTER_PORT(5, 1);
 148         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 149
 150         /* Slave dc0 connected to master port 1 */
 151         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1);
 152         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 153
 154         /* Slave dc4 and dc7 connected to master port 1 */
 155         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(4, 1) |
 156                 VPU_RDARB_SLAVE_TO_MASTER_PORT(7, 1);
 157         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 158
 159         /* Slave dc1 connected to master port 1 */
 160         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(1, 1);
 161         writel_relaxed(value, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
 162 }
 163
 164 struct meson_drm_soc_attr {
 165         struct meson_drm_soc_limits limits;
 166         const struct soc_device_attribute *attrs;
 167 };
 168
 169 static const struct meson_drm_soc_attr meson_drm_soc_attrs[] = {
 170         /* S805X/S805Y HDMI PLL won't lock for HDMI PHY freq > 1,65GHz */
 171         {
 172                 .limits = {
 173                         .max_hdmi_phy_freq = 1650000,
 174                 },
 175                 .attrs = (const struct soc_device_attribute []) {
 176                         { .soc_id = "GXL (S805*)", },
 177                         { /* sentinel */ }
 178                 }
 179         },
 180 };
 181
 182 static int meson_drv_bind_master(struct device *dev, bool has_components)
 183 {
 184         struct platform_device *pdev = to_platform_device(dev);
 185         const struct meson_drm_match_data *match;
 186         struct meson_drm *priv;
 187         struct drm_device *drm;
 188         struct resource *res;
 189         void __iomem *regs;
 190         int ret, i;
 191
 192         /* Checks if an output connector is available */
 193         if (!meson_vpu_has_available_connectors(dev)) {
 194                 dev_err(dev, "No output connector available\n");
 195                 return -ENODEV;
 196         }
 197
 198         match = of_device_get_match_data(dev);
 199         if (!match)
 200                 return -ENODEV;
 201
 202         drm = drm_dev_alloc(&meson_driver, dev);
 203         if (IS_ERR(drm))
 204                 return PTR_ERR(drm);
 205
 206         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 207         if (!priv) {
 208                 ret = -ENOMEM;
 209                 goto free_drm;
 210         }
 211         drm->dev_private = priv;
 212         priv->drm = drm;
 213         priv->dev = dev;
 214         priv->compat = match->compat;
 215         priv->afbcd.ops = match->afbcd_ops;
 216
 217         regs = devm_platform_ioremap_resource_byname(pdev, "vpu");
 218         if (IS_ERR(regs)) {
 219                 ret = PTR_ERR(regs);
 220                 goto free_drm;
 221         }
 222
 223         priv->io_base = regs;
 224
 225         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 226         if (!res) {
 227                 ret = -EINVAL;
 228                 goto free_drm;
 229         }
 230         /* Simply ioremap since it may be a shared register zone */
 231         regs = devm_ioremap(dev, res->start, resource_size(res));
 232         if (!regs) {
 233                 ret = -EADDRNOTAVAIL;
 234                 goto free_drm;
 235         }
 236
 237         priv->hhi = devm_regmap_init_mmio(dev, regs,
 238                                           &meson_regmap_config);
 239         if (IS_ERR(priv->hhi)) {
 240                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 241                 ret = PTR_ERR(priv->hhi);
 242                 goto free_drm;
 243         }
 244
 245         priv->canvas = meson_canvas_get(dev);
 246         if (IS_ERR(priv->canvas)) {
 247                 ret = PTR_ERR(priv->canvas);
 248                 goto free_drm;
 249         }
 250
 251         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
 252         if (ret)
 253                 goto free_drm;
 254         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
 255         if (ret)
 256                 goto free_canvas_osd1;
 257         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
 258         if (ret)
 259                 goto free_canvas_vd1_0;
 260         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
 261         if (ret)
 262                 goto free_canvas_vd1_1;
 263
 264         priv->vsync_irq = platform_get_irq(pdev, 0);
 265
 266         ret = drm_vblank_init(drm, 1);
 267         if (ret)
 268                 goto free_canvas_vd1_2;
 269
 270         /* Assign limits per soc revision/package */
 271         for (i = 0 ; i < ARRAY_SIZE(meson_drm_soc_attrs) ; ++i) {
 272                 if (soc_device_match(meson_drm_soc_attrs[i].attrs)) {
 273                         priv->limits = &meson_drm_soc_attrs[i].limits;
 274                         break;
 275                 }
 276         }
 277
 278         /*
 279          * Remove early framebuffers (ie. simplefb). The framebuffer can be
 280          * located anywhere in RAM
 281          */
 282         ret = aperture_remove_all_conflicting_devices(meson_driver.name);
 283         if (ret)
 284                 goto free_canvas_vd1_2;
 285
 286         ret = drmm_mode_config_init(drm);
 287         if (ret)
 288                 goto free_canvas_vd1_2;
 289         drm->mode_config.max_width = 3840;
 290         drm->mode_config.max_height = 2160;
 291         drm->mode_config.funcs = &meson_mode_config_funcs;
 292         drm->mode_config.helper_private = &meson_mode_config_helpers;
 293
 294         /* Hardware Initialization */
 295
 296         meson_vpu_init(priv);
 297         meson_venc_init(priv);
 298         meson_vpp_init(priv);
 299         meson_viu_init(priv);
 300         if (priv->afbcd.ops) {
 301                 ret = priv->afbcd.ops->init(priv);
 302                 if (ret)
 303                         goto free_canvas_vd1_2;
 304         }
 305
 306         /* Encoder Initialization */
 307
 308         ret = meson_encoder_cvbs_probe(priv);
 309         if (ret)
 310                 goto exit_afbcd;
 311
 312         if (has_components) {
 313                 ret = component_bind_all(dev, drm);
 314                 if (ret) {
 315                         dev_err(drm->dev, "Couldn't bind all components\n");
 316                         /* Do not try to unbind */
 317                         has_components = false;
 318                         goto exit_afbcd;
 319                 }
 320         }
 321
 322         ret = meson_encoder_hdmi_probe(priv);
 323         if (ret)
 324                 goto exit_afbcd;
 325
 326         if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
 327                 ret = meson_encoder_dsi_probe(priv);
 328                 if (ret)
 329                         goto exit_afbcd;
 330         }
 331
 332         ret = meson_plane_create(priv);
 333         if (ret)
 334                 goto exit_afbcd;
 335
 336         ret = meson_overlay_create(priv);
 337         if (ret)
 338                 goto exit_afbcd;
 339
 340         ret = meson_crtc_create(priv);
 341         if (ret)
 342                 goto exit_afbcd;
 343
 344         ret = request_irq(priv->vsync_irq, meson_irq, 0, drm->driver->name, drm);
 345         if (ret)
 346                 goto exit_afbcd;
 347
 348         drm_mode_config_reset(drm);
 349
 350         drm_kms_helper_poll_init(drm);
 351
 352         platform_set_drvdata(pdev, priv);
 353
 354         ret = drm_dev_register(drm, 0);
 355         if (ret)
 356                 goto uninstall_irq;
 357
 358         drm_client_setup(drm, NULL);
 359
 360         return 0;
 361
 362 uninstall_irq:
 363         free_irq(priv->vsync_irq, drm);
 364 exit_afbcd:
 365         if (priv->afbcd.ops)
 366                 priv->afbcd.ops->exit(priv);
 367 free_canvas_vd1_2:
 368         meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 369 free_canvas_vd1_1:
 370         meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 371 free_canvas_vd1_0:
 372         meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 373 free_canvas_osd1:
 374         meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 375 free_drm:
 376         drm_dev_put(drm);
 377
 378         meson_encoder_dsi_remove(priv);
 379         meson_encoder_hdmi_remove(priv);
 380         meson_encoder_cvbs_remove(priv);
 381
 382         if (has_components)
 383                 component_unbind_all(dev, drm);
 384
 385         return ret;
 386 }
 387
 388 static int meson_drv_bind(struct device *dev)
 389 {
 390         return meson_drv_bind_master(dev, true);
 391 }
 392
 393 static void meson_drv_unbind(struct device *dev)
 394 {
 395         struct meson_drm *priv = dev_get_drvdata(dev);
 396         struct drm_device *drm = priv->drm;
 397
 398         if (priv->canvas) {
 399                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 400                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 401                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 402                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 403         }
 404
 405         drm_dev_unregister(drm);
 406         drm_kms_helper_poll_fini(drm);
 407         drm_atomic_helper_shutdown(drm);
 408         free_irq(priv->vsync_irq, drm);
 409         drm_dev_put(drm);
 410
 411         meson_encoder_dsi_remove(priv);
 412         meson_encoder_hdmi_remove(priv);
 413         meson_encoder_cvbs_remove(priv);
 414
 415         component_unbind_all(dev, drm);
 416
 417         if (priv->afbcd.ops)
 418                 priv->afbcd.ops->exit(priv);
 419 }
 420
 421 static const struct component_master_ops meson_drv_master_ops = {
 422         .bind   = meson_drv_bind,
 423         .unbind = meson_drv_unbind,
 424 };
 425
 426 static int __maybe_unused meson_drv_pm_suspend(struct device *dev)
 427 {
 428         struct meson_drm *priv = dev_get_drvdata(dev);
 429
 430         if (!priv)
 431                 return 0;
 432
 433         return drm_mode_config_helper_suspend(priv->drm);
 434 }
 435
 436 static int __maybe_unused meson_drv_pm_resume(struct device *dev)
 437 {
 438         struct meson_drm *priv = dev_get_drvdata(dev);
 439
 440         if (!priv)
 441                 return 0;
 442
 443         meson_vpu_init(priv);
 444         meson_venc_init(priv);
 445         meson_vpp_init(priv);
 446         meson_viu_init(priv);
 447         if (priv->afbcd.ops)
 448                 priv->afbcd.ops->init(priv);
 449
 450         return drm_mode_config_helper_resume(priv->drm);
 451 }
 452
 453 static void meson_drv_shutdown(struct platform_device *pdev)
 454 {
 455         struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
 456
 457         if (!priv)
 458                 return;
 459
 460         drm_kms_helper_poll_fini(priv->drm);
 461         drm_atomic_helper_shutdown(priv->drm);
 462 }
 463
 464 /*
 465  * Only devices to use as components
 466  * TOFIX: get rid of components when we can finally
 467  * get meson_dx_hdmi to stop using the meson_drm
 468  * private structure for HHI registers.
 469  */
 470 static const struct of_device_id components_dev_match[] = {
 471         { .compatible = "amlogic,meson-gxbb-dw-hdmi" },
 472         { .compatible = "amlogic,meson-gxl-dw-hdmi" },
 473         { .compatible = "amlogic,meson-gxm-dw-hdmi" },
 474         { .compatible = "amlogic,meson-g12a-dw-hdmi" },
 475         {}
 476 };
 477
 478 static int meson_drv_probe(struct platform_device *pdev)
 479 {
 480         struct component_match *match = NULL;
 481         struct device_node *np = pdev->dev.of_node;
 482         struct device_node *ep, *remote;
 483         int count = 0;
 484
 485         for_each_endpoint_of_node(np, ep) {
 486                 remote = of_graph_get_remote_port_parent(ep);
 487                 if (!remote || !of_device_is_available(remote)) {
 488                         of_node_put(remote);
 489                         continue;
 490                 }
 491
 492                 if (of_match_node(components_dev_match, remote)) {
 493                         component_match_add(&pdev->dev, &match, component_compare_of, remote);
 494
 495                         dev_dbg(&pdev->dev, "parent %pOF remote match add %pOF parent %s\n",
 496                                 np, remote, dev_name(&pdev->dev));
 497                 }
 498
 499                 of_node_put(remote);
 500
 501                 ++count;
 502         }
 503
 504         if (count && !match)
 505                 return meson_drv_bind_master(&pdev->dev, false);
 506
 507         /* If some endpoints were found, initialize the nodes */
 508         if (count) {
 509                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 510
 511                 return component_master_add_with_match(&pdev->dev,
 512                                                        &meson_drv_master_ops,
 513                                                        match);
 514         }
 515
 516         /* If no output endpoints were available, simply bail out */
 517         return 0;
 518 };
 519
 520 static void meson_drv_remove(struct platform_device *pdev)
 521 {
 522         component_master_del(&pdev->dev, &meson_drv_master_ops);
 523 }
 524
 525 static struct meson_drm_match_data meson_drm_gxbb_data = {
 526         .compat = VPU_COMPATIBLE_GXBB,
 527 };
 528
 529 static struct meson_drm_match_data meson_drm_gxl_data = {
 530         .compat = VPU_COMPATIBLE_GXL,
 531 };
 532
 533 static struct meson_drm_match_data meson_drm_gxm_data = {
 534         .compat = VPU_COMPATIBLE_GXM,
 535         .afbcd_ops = &meson_afbcd_gxm_ops,
 536 };
 537
 538 static struct meson_drm_match_data meson_drm_g12a_data = {
 539         .compat = VPU_COMPATIBLE_G12A,
 540         .afbcd_ops = &meson_afbcd_g12a_ops,
 541 };
 542
 543 static const struct of_device_id dt_match[] = {
 544         { .compatible = "amlogic,meson-gxbb-vpu",
 545           .data       = (void *)&meson_drm_gxbb_data },
 546         { .compatible = "amlogic,meson-gxl-vpu",
 547           .data       = (void *)&meson_drm_gxl_data },
 548         { .compatible = "amlogic,meson-gxm-vpu",
 549           .data       = (void *)&meson_drm_gxm_data },
 550         { .compatible = "amlogic,meson-g12a-vpu",
 551           .data       = (void *)&meson_drm_g12a_data },
 552         {}
 553 };
 554 MODULE_DEVICE_TABLE(of, dt_match);
 555
 556 static const struct dev_pm_ops meson_drv_pm_ops = {
 557         SET_SYSTEM_SLEEP_PM_OPS(meson_drv_pm_suspend, meson_drv_pm_resume)
 558 };
 559
 560 static struct platform_driver meson_drm_platform_driver = {
 561         .probe      = meson_drv_probe,
 562         .remove     = meson_drv_remove,
 563         .shutdown   = meson_drv_shutdown,
 564         .driver     = {
 565                 .name   = "meson-drm",
 566                 .of_match_table = dt_match,
 567                 .pm = &meson_drv_pm_ops,
 568         },
 569 };
 570
 571 drm_module_platform_driver(meson_drm_platform_driver);
 572
 573 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
 574 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
 575 MODULE_DESCRIPTION(DRIVER_DESC);
 576 MODULE_LICENSE("GPL");