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_dma_helper.h>
  23 #include <drm/drm_gem_framebuffer_helper.h>
  24 #include <drm/drm_modeset_helper_vtables.h>
  25 #include <drm/drm_module.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_encoder_cvbs.h"
  36 #include "meson_encoder_hdmi.h"
  37 #include "meson_viu.h"
  38 #include "meson_vpp.h"
  39 #include "meson_rdma.h"
  40
  41 #define DRIVER_NAME "meson"
  42 #define DRIVER_DESC "Amlogic Meson DRM driver"
  43
  44 /**
  45  * DOC: Video Processing Unit
  46  *
  47  * VPU Handles the Global Video Processing, it includes management of the
  48  * clocks gates, blocks reset lines and power domains.
  49  *
  50  * What is missing :
  51  *
  52  * - Full reset of entire video processing HW blocks
  53  * - Scaling and setup of the VPU clock
  54  * - Bus clock gates
  55  * - Powering up video processing HW blocks
  56  * - Powering Up HDMI controller and PHY
  57  */
  58
  59 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
  60         .atomic_check        = drm_atomic_helper_check,
  61         .atomic_commit       = drm_atomic_helper_commit,
  62         .fb_create           = drm_gem_fb_create,
  63 };
  64
  65 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
  66         .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
  67 };
  68
  69 static irqreturn_t meson_irq(int irq, void *arg)
  70 {
  71         struct drm_device *dev = arg;
  72         struct meson_drm *priv = dev->dev_private;
  73
  74         (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
  75
  76         meson_crtc_irq(priv);
  77
  78         return IRQ_HANDLED;
  79 }
  80
  81 static int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
  82                              struct drm_mode_create_dumb *args)
  83 {
  84         /*
  85          * We need 64bytes aligned stride, and PAGE aligned size
  86          */
  87         args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
  88         args->size = PAGE_ALIGN(args->pitch * args->height);
  89
  90         return drm_gem_dma_dumb_create_internal(file, dev, args);
  91 }
  92
  93 DEFINE_DRM_GEM_DMA_FOPS(fops);
  94
  95 static const struct drm_driver meson_driver = {
  96         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
  97
  98         /* DMA Ops */
  99         DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(meson_dumb_create),
 100
 101         /* Misc */
 102         .fops                   = &fops,
 103         .name                   = DRIVER_NAME,
 104         .desc                   = DRIVER_DESC,
 105         .date                   = "20161109",
 106         .major                  = 1,
 107         .minor                  = 0,
 108 };
 109
 110 static bool meson_vpu_has_available_connectors(struct device *dev)
 111 {
 112         struct device_node *ep, *remote;
 113
 114         /* Parses each endpoint and check if remote exists */
 115         for_each_endpoint_of_node(dev->of_node, ep) {
 116                 /* If the endpoint node exists, consider it enabled */
 117                 remote = of_graph_get_remote_port(ep);
 118                 if (remote) {
 119                         of_node_put(remote);
 120                         of_node_put(ep);
 121                         return true;
 122                 }
 123         }
 124
 125         return false;
 126 }
 127
 128 static struct regmap_config meson_regmap_config = {
 129         .reg_bits       = 32,
 130         .val_bits       = 32,
 131         .reg_stride     = 4,
 132         .max_register   = 0x1000,
 133 };
 134
 135 static void meson_vpu_init(struct meson_drm *priv)
 136 {
 137         u32 value;
 138
 139         /*
 140          * Slave dc0 and dc5 connected to master port 1.
 141          * By default other slaves are connected to master port 0.
 142          */
 143         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1) |
 144                 VPU_RDARB_SLAVE_TO_MASTER_PORT(5, 1);
 145         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 146
 147         /* Slave dc0 connected to master port 1 */
 148         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1);
 149         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 150
 151         /* Slave dc4 and dc7 connected to master port 1 */
 152         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(4, 1) |
 153                 VPU_RDARB_SLAVE_TO_MASTER_PORT(7, 1);
 154         writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 155
 156         /* Slave dc1 connected to master port 1 */
 157         value = VPU_RDARB_SLAVE_TO_MASTER_PORT(1, 1);
 158         writel_relaxed(value, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
 159 }
 160
 161 struct meson_drm_soc_attr {
 162         struct meson_drm_soc_limits limits;
 163         const struct soc_device_attribute *attrs;
 164 };
 165
 166 static const struct meson_drm_soc_attr meson_drm_soc_attrs[] = {
 167         /* S805X/S805Y HDMI PLL won't lock for HDMI PHY freq > 1,65GHz */
 168         {
 169                 .limits = {
 170                         .max_hdmi_phy_freq = 1650000,
 171                 },
 172                 .attrs = (const struct soc_device_attribute []) {
 173                         { .soc_id = "GXL (S805*)", },
 174                         { /* sentinel */ }
 175                 }
 176         },
 177 };
 178
 179 static int meson_drv_bind_master(struct device *dev, bool has_components)
 180 {
 181         struct platform_device *pdev = to_platform_device(dev);
 182         const struct meson_drm_match_data *match;
 183         struct meson_drm *priv;
 184         struct drm_device *drm;
 185         struct resource *res;
 186         void __iomem *regs;
 187         int ret, i;
 188
 189         /* Checks if an output connector is available */
 190         if (!meson_vpu_has_available_connectors(dev)) {
 191                 dev_err(dev, "No output connector available\n");
 192                 return -ENODEV;
 193         }
 194
 195         match = of_device_get_match_data(dev);
 196         if (!match)
 197                 return -ENODEV;
 198
 199         drm = drm_dev_alloc(&meson_driver, dev);
 200         if (IS_ERR(drm))
 201                 return PTR_ERR(drm);
 202
 203         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 204         if (!priv) {
 205                 ret = -ENOMEM;
 206                 goto free_drm;
 207         }
 208         drm->dev_private = priv;
 209         priv->drm = drm;
 210         priv->dev = dev;
 211         priv->compat = match->compat;
 212         priv->afbcd.ops = match->afbcd_ops;
 213
 214         regs = devm_platform_ioremap_resource_byname(pdev, "vpu");
 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_driver);
 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                         goto free_drm;
 310         }
 311
 312         /* Encoder Initialization */
 313
 314         ret = meson_encoder_cvbs_init(priv);
 315         if (ret)
 316                 goto exit_afbcd;
 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 exit_afbcd;
 323                 }
 324         }
 325
 326         ret = meson_encoder_hdmi_init(priv);
 327         if (ret)
 328                 goto exit_afbcd;
 329
 330         ret = meson_plane_create(priv);
 331         if (ret)
 332                 goto exit_afbcd;
 333
 334         ret = meson_overlay_create(priv);
 335         if (ret)
 336                 goto exit_afbcd;
 337
 338         ret = meson_crtc_create(priv);
 339         if (ret)
 340                 goto exit_afbcd;
 341
 342         ret = request_irq(priv->vsync_irq, meson_irq, 0, drm->driver->name, drm);
 343         if (ret)
 344                 goto exit_afbcd;
 345
 346         drm_mode_config_reset(drm);
 347
 348         drm_kms_helper_poll_init(drm);
 349
 350         platform_set_drvdata(pdev, priv);
 351
 352         ret = drm_dev_register(drm, 0);
 353         if (ret)
 354                 goto uninstall_irq;
 355
 356         drm_fbdev_generic_setup(drm, 32);
 357
 358         return 0;
 359
 360 uninstall_irq:
 361         free_irq(priv->vsync_irq, drm);
 362 exit_afbcd:
 363         if (priv->afbcd.ops)
 364                 priv->afbcd.ops->exit(priv);
 365 free_drm:
 366         drm_dev_put(drm);
 367
 368         return ret;
 369 }
 370
 371 static int meson_drv_bind(struct device *dev)
 372 {
 373         return meson_drv_bind_master(dev, true);
 374 }
 375
 376 static void meson_drv_unbind(struct device *dev)
 377 {
 378         struct meson_drm *priv = dev_get_drvdata(dev);
 379         struct drm_device *drm = priv->drm;
 380
 381         if (priv->canvas) {
 382                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 383                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 384                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 385                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 386         }
 387
 388         drm_dev_unregister(drm);
 389         drm_kms_helper_poll_fini(drm);
 390         drm_atomic_helper_shutdown(drm);
 391         component_unbind_all(dev, drm);
 392         free_irq(priv->vsync_irq, drm);
 393         drm_dev_put(drm);
 394
 395         if (priv->afbcd.ops)
 396                 priv->afbcd.ops->exit(priv);
 397 }
 398
 399 static const struct component_master_ops meson_drv_master_ops = {
 400         .bind   = meson_drv_bind,
 401         .unbind = meson_drv_unbind,
 402 };
 403
 404 static int __maybe_unused meson_drv_pm_suspend(struct device *dev)
 405 {
 406         struct meson_drm *priv = dev_get_drvdata(dev);
 407
 408         if (!priv)
 409                 return 0;
 410
 411         return drm_mode_config_helper_suspend(priv->drm);
 412 }
 413
 414 static int __maybe_unused meson_drv_pm_resume(struct device *dev)
 415 {
 416         struct meson_drm *priv = dev_get_drvdata(dev);
 417
 418         if (!priv)
 419                 return 0;
 420
 421         meson_vpu_init(priv);
 422         meson_venc_init(priv);
 423         meson_vpp_init(priv);
 424         meson_viu_init(priv);
 425         if (priv->afbcd.ops)
 426                 priv->afbcd.ops->init(priv);
 427
 428         return drm_mode_config_helper_resume(priv->drm);
 429 }
 430
 431 static void meson_drv_shutdown(struct platform_device *pdev)
 432 {
 433         struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
 434
 435         if (!priv)
 436                 return;
 437
 438         drm_kms_helper_poll_fini(priv->drm);
 439         drm_atomic_helper_shutdown(priv->drm);
 440 }
 441
 442 /* Possible connectors nodes to ignore */
 443 static const struct of_device_id connectors_match[] = {
 444         { .compatible = "composite-video-connector" },
 445         { .compatible = "svideo-connector" },
 446         {}
 447 };
 448
 449 static int meson_drv_probe(struct platform_device *pdev)
 450 {
 451         struct component_match *match = NULL;
 452         struct device_node *np = pdev->dev.of_node;
 453         struct device_node *ep, *remote;
 454         int count = 0;
 455
 456         for_each_endpoint_of_node(np, ep) {
 457                 remote = of_graph_get_remote_port_parent(ep);
 458                 if (!remote || !of_device_is_available(remote)) {
 459                         of_node_put(remote);
 460                         continue;
 461                 }
 462
 463                 /* If an analog connector is detected, count it as an output */
 464                 if (of_match_node(connectors_match, remote)) {
 465                         ++count;
 466                         of_node_put(remote);
 467                         continue;
 468                 }
 469
 470                 dev_dbg(&pdev->dev, "parent %pOF remote match add %pOF parent %s\n",
 471                         np, remote, dev_name(&pdev->dev));
 472
 473                 component_match_add(&pdev->dev, &match, component_compare_of, remote);
 474
 475                 of_node_put(remote);
 476
 477                 ++count;
 478         }
 479
 480         if (count && !match)
 481                 return meson_drv_bind_master(&pdev->dev, false);
 482
 483         /* If some endpoints were found, initialize the nodes */
 484         if (count) {
 485                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 486
 487                 return component_master_add_with_match(&pdev->dev,
 488                                                        &meson_drv_master_ops,
 489                                                        match);
 490         }
 491
 492         /* If no output endpoints were available, simply bail out */
 493         return 0;
 494 };
 495
 496 static struct meson_drm_match_data meson_drm_gxbb_data = {
 497         .compat = VPU_COMPATIBLE_GXBB,
 498 };
 499
 500 static struct meson_drm_match_data meson_drm_gxl_data = {
 501         .compat = VPU_COMPATIBLE_GXL,
 502 };
 503
 504 static struct meson_drm_match_data meson_drm_gxm_data = {
 505         .compat = VPU_COMPATIBLE_GXM,
 506         .afbcd_ops = &meson_afbcd_gxm_ops,
 507 };
 508
 509 static struct meson_drm_match_data meson_drm_g12a_data = {
 510         .compat = VPU_COMPATIBLE_G12A,
 511         .afbcd_ops = &meson_afbcd_g12a_ops,
 512 };
 513
 514 static const struct of_device_id dt_match[] = {
 515         { .compatible = "amlogic,meson-gxbb-vpu",
 516           .data       = (void *)&meson_drm_gxbb_data },
 517         { .compatible = "amlogic,meson-gxl-vpu",
 518           .data       = (void *)&meson_drm_gxl_data },
 519         { .compatible = "amlogic,meson-gxm-vpu",
 520           .data       = (void *)&meson_drm_gxm_data },
 521         { .compatible = "amlogic,meson-g12a-vpu",
 522           .data       = (void *)&meson_drm_g12a_data },
 523         {}
 524 };
 525 MODULE_DEVICE_TABLE(of, dt_match);
 526
 527 static const struct dev_pm_ops meson_drv_pm_ops = {
 528         SET_SYSTEM_SLEEP_PM_OPS(meson_drv_pm_suspend, meson_drv_pm_resume)
 529 };
 530
 531 static struct platform_driver meson_drm_platform_driver = {
 532         .probe      = meson_drv_probe,
 533         .shutdown   = meson_drv_shutdown,
 534         .driver     = {
 535                 .name   = "meson-drm",
 536                 .of_match_table = dt_match,
 537                 .pm = &meson_drv_pm_ops,
 538         },
 539 };
 540
 541 drm_module_platform_driver(meson_drm_platform_driver);
 542
 543 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
 544 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
 545 MODULE_DESCRIPTION(DRIVER_DESC);
 546 MODULE_LICENSE("GPL");