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