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/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/mutex.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/component.h>
  16 #include <linux/of_graph.h>
  17
  18 #include <drm/drmP.h>
  19 #include <drm/drm_atomic.h>
  20 #include <drm/drm_atomic_helper.h>
  21 #include <drm/drm_fb_cma_helper.h>
  22 #include <drm/drm_fb_helper.h>
  23 #include <drm/drm_flip_work.h>
  24 #include <drm/drm_gem_cma_helper.h>
  25 #include <drm/drm_gem_framebuffer_helper.h>
  26 #include <drm/drm_plane_helper.h>
  27 #include <drm/drm_probe_helper.h>
  28 #include <drm/drm_rect.h>
  29
  30 #include "meson_drv.h"
  31 #include "meson_plane.h"
  32 #include "meson_overlay.h"
  33 #include "meson_crtc.h"
  34 #include "meson_venc_cvbs.h"
  35
  36 #include "meson_vpp.h"
  37 #include "meson_viu.h"
  38 #include "meson_venc.h"
  39 #include "meson_registers.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_cma_dumb_create_internal(file, dev, args);
  91 }
  92
  93 DEFINE_DRM_GEM_CMA_FOPS(fops);
  94
  95 static struct drm_driver meson_driver = {
  96         .driver_features        = DRIVER_GEM |
  97                                   DRIVER_MODESET | DRIVER_PRIME |
  98                                   DRIVER_ATOMIC,
  99
 100         /* IRQ */
 101         .irq_handler            = meson_irq,
 102
 103         /* PRIME Ops */
 104         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 105         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 106         .gem_prime_import       = drm_gem_prime_import,
 107         .gem_prime_export       = drm_gem_prime_export,
 108         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 109         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 110         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 111         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 112         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 113
 114         /* GEM Ops */
 115         .dumb_create            = meson_dumb_create,
 116         .gem_free_object_unlocked = drm_gem_cma_free_object,
 117         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 118
 119         /* Misc */
 120         .fops                   = &fops,
 121         .name                   = DRIVER_NAME,
 122         .desc                   = DRIVER_DESC,
 123         .date                   = "20161109",
 124         .major                  = 1,
 125         .minor                  = 0,
 126 };
 127
 128 static bool meson_vpu_has_available_connectors(struct device *dev)
 129 {
 130         struct device_node *ep, *remote;
 131
 132         /* Parses each endpoint and check if remote exists */
 133         for_each_endpoint_of_node(dev->of_node, ep) {
 134                 /* If the endpoint node exists, consider it enabled */
 135                 remote = of_graph_get_remote_port(ep);
 136                 if (remote)
 137                         return true;
 138         }
 139
 140         return false;
 141 }
 142
 143 static struct regmap_config meson_regmap_config = {
 144         .reg_bits       = 32,
 145         .val_bits       = 32,
 146         .reg_stride     = 4,
 147         .max_register   = 0x1000,
 148 };
 149
 150 static void meson_vpu_init(struct meson_drm *priv)
 151 {
 152         writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 153         writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 154         writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 155         writel_relaxed(0x20000, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
 156 }
 157
 158 static void meson_remove_framebuffers(void)
 159 {
 160         struct apertures_struct *ap;
 161
 162         ap = alloc_apertures(1);
 163         if (!ap)
 164                 return;
 165
 166         /* The framebuffer can be located anywhere in RAM */
 167         ap->ranges[0].base = 0;
 168         ap->ranges[0].size = ~0;
 169
 170         drm_fb_helper_remove_conflicting_framebuffers(ap, "meson-drm-fb",
 171                                                       false);
 172         kfree(ap);
 173 }
 174
 175 static int meson_drv_bind_master(struct device *dev, bool has_components)
 176 {
 177         struct platform_device *pdev = to_platform_device(dev);
 178         struct meson_drm *priv;
 179         struct drm_device *drm;
 180         struct resource *res;
 181         void __iomem *regs;
 182         int ret;
 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         drm = drm_dev_alloc(&meson_driver, dev);
 191         if (IS_ERR(drm))
 192                 return PTR_ERR(drm);
 193
 194         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 195         if (!priv) {
 196                 ret = -ENOMEM;
 197                 goto free_drm;
 198         }
 199         drm->dev_private = priv;
 200         priv->drm = drm;
 201         priv->dev = dev;
 202
 203         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
 204         regs = devm_ioremap_resource(dev, res);
 205         if (IS_ERR(regs)) {
 206                 ret = PTR_ERR(regs);
 207                 goto free_drm;
 208         }
 209
 210         priv->io_base = regs;
 211
 212         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 213         if (!res) {
 214                 ret = -EINVAL;
 215                 goto free_drm;
 216         }
 217         /* Simply ioremap since it may be a shared register zone */
 218         regs = devm_ioremap(dev, res->start, resource_size(res));
 219         if (!regs) {
 220                 ret = -EADDRNOTAVAIL;
 221                 goto free_drm;
 222         }
 223
 224         priv->hhi = devm_regmap_init_mmio(dev, regs,
 225                                           &meson_regmap_config);
 226         if (IS_ERR(priv->hhi)) {
 227                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 228                 ret = PTR_ERR(priv->hhi);
 229                 goto free_drm;
 230         }
 231
 232         priv->canvas = meson_canvas_get(dev);
 233         if (IS_ERR(priv->canvas)) {
 234                 ret = PTR_ERR(priv->canvas);
 235                 goto free_drm;
 236         }
 237
 238         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
 239         if (ret)
 240                 goto free_drm;
 241         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
 242         if (ret) {
 243                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 244                 goto free_drm;
 245         }
 246         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
 247         if (ret) {
 248                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 249                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 250                 goto free_drm;
 251         }
 252         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
 253         if (ret) {
 254                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 255                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 256                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 257                 goto free_drm;
 258         }
 259
 260         priv->vsync_irq = platform_get_irq(pdev, 0);
 261
 262         ret = drm_vblank_init(drm, 1);
 263         if (ret)
 264                 goto free_drm;
 265
 266         /* Remove early framebuffers (ie. simplefb) */
 267         meson_remove_framebuffers();
 268
 269         drm_mode_config_init(drm);
 270         drm->mode_config.max_width = 3840;
 271         drm->mode_config.max_height = 2160;
 272         drm->mode_config.funcs = &meson_mode_config_funcs;
 273         drm->mode_config.helper_private = &meson_mode_config_helpers;
 274
 275         /* Hardware Initialization */
 276
 277         meson_vpu_init(priv);
 278         meson_venc_init(priv);
 279         meson_vpp_init(priv);
 280         meson_viu_init(priv);
 281
 282         /* Encoder Initialization */
 283
 284         ret = meson_venc_cvbs_create(priv);
 285         if (ret)
 286                 goto free_drm;
 287
 288         if (has_components) {
 289                 ret = component_bind_all(drm->dev, drm);
 290                 if (ret) {
 291                         dev_err(drm->dev, "Couldn't bind all components\n");
 292                         goto free_drm;
 293                 }
 294         }
 295
 296         ret = meson_plane_create(priv);
 297         if (ret)
 298                 goto free_drm;
 299
 300         ret = meson_overlay_create(priv);
 301         if (ret)
 302                 goto free_drm;
 303
 304         ret = meson_crtc_create(priv);
 305         if (ret)
 306                 goto free_drm;
 307
 308         ret = drm_irq_install(drm, priv->vsync_irq);
 309         if (ret)
 310                 goto free_drm;
 311
 312         drm_mode_config_reset(drm);
 313
 314         drm_kms_helper_poll_init(drm);
 315
 316         platform_set_drvdata(pdev, priv);
 317
 318         ret = drm_dev_register(drm, 0);
 319         if (ret)
 320                 goto uninstall_irq;
 321
 322         drm_fbdev_generic_setup(drm, 32);
 323
 324         return 0;
 325
 326 uninstall_irq:
 327         drm_irq_uninstall(drm);
 328 free_drm:
 329         drm_dev_put(drm);
 330
 331         return ret;
 332 }
 333
 334 static int meson_drv_bind(struct device *dev)
 335 {
 336         return meson_drv_bind_master(dev, true);
 337 }
 338
 339 static void meson_drv_unbind(struct device *dev)
 340 {
 341         struct meson_drm *priv = dev_get_drvdata(dev);
 342         struct drm_device *drm = priv->drm;
 343
 344         if (priv->canvas) {
 345                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 346                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 347                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 348                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 349         }
 350
 351         drm_dev_unregister(drm);
 352         drm_irq_uninstall(drm);
 353         drm_kms_helper_poll_fini(drm);
 354         drm_mode_config_cleanup(drm);
 355         drm_dev_put(drm);
 356
 357 }
 358
 359 static const struct component_master_ops meson_drv_master_ops = {
 360         .bind   = meson_drv_bind,
 361         .unbind = meson_drv_unbind,
 362 };
 363
 364 static int compare_of(struct device *dev, void *data)
 365 {
 366         DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
 367                          dev->of_node, data);
 368
 369         return dev->of_node == data;
 370 }
 371
 372 /* Possible connectors nodes to ignore */
 373 static const struct of_device_id connectors_match[] = {
 374         { .compatible = "composite-video-connector" },
 375         { .compatible = "svideo-connector" },
 376         { .compatible = "hdmi-connector" },
 377         { .compatible = "dvi-connector" },
 378         {}
 379 };
 380
 381 static int meson_probe_remote(struct platform_device *pdev,
 382                               struct component_match **match,
 383                               struct device_node *parent,
 384                               struct device_node *remote)
 385 {
 386         struct device_node *ep, *remote_node;
 387         int count = 1;
 388
 389         /* If node is a connector, return and do not add to match table */
 390         if (of_match_node(connectors_match, remote))
 391                 return 1;
 392
 393         component_match_add(&pdev->dev, match, compare_of, remote);
 394
 395         for_each_endpoint_of_node(remote, ep) {
 396                 remote_node = of_graph_get_remote_port_parent(ep);
 397                 if (!remote_node ||
 398                     remote_node == parent || /* Ignore parent endpoint */
 399                     !of_device_is_available(remote_node)) {
 400                         of_node_put(remote_node);
 401                         continue;
 402                 }
 403
 404                 count += meson_probe_remote(pdev, match, remote, remote_node);
 405
 406                 of_node_put(remote_node);
 407         }
 408
 409         return count;
 410 }
 411
 412 static int meson_drv_probe(struct platform_device *pdev)
 413 {
 414         struct component_match *match = NULL;
 415         struct device_node *np = pdev->dev.of_node;
 416         struct device_node *ep, *remote;
 417         int count = 0;
 418
 419         for_each_endpoint_of_node(np, ep) {
 420                 remote = of_graph_get_remote_port_parent(ep);
 421                 if (!remote || !of_device_is_available(remote)) {
 422                         of_node_put(remote);
 423                         continue;
 424                 }
 425
 426                 count += meson_probe_remote(pdev, &match, np, remote);
 427                 of_node_put(remote);
 428         }
 429
 430         if (count && !match)
 431                 return meson_drv_bind_master(&pdev->dev, false);
 432
 433         /* If some endpoints were found, initialize the nodes */
 434         if (count) {
 435                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 436
 437                 return component_master_add_with_match(&pdev->dev,
 438                                                        &meson_drv_master_ops,
 439                                                        match);
 440         }
 441
 442         /* If no output endpoints were available, simply bail out */
 443         return 0;
 444 };
 445
 446 static const struct of_device_id dt_match[] = {
 447         { .compatible = "amlogic,meson-gxbb-vpu" },
 448         { .compatible = "amlogic,meson-gxl-vpu" },
 449         { .compatible = "amlogic,meson-gxm-vpu" },
 450         { .compatible = "amlogic,meson-g12a-vpu" },
 451         {}
 452 };
 453 MODULE_DEVICE_TABLE(of, dt_match);
 454
 455 static struct platform_driver meson_drm_platform_driver = {
 456         .probe      = meson_drv_probe,
 457         .driver     = {
 458                 .name   = "meson-drm",
 459                 .of_match_table = dt_match,
 460         },
 461 };
 462
 463 module_platform_driver(meson_drm_platform_driver);
 464
 465 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
 466 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
 467 MODULE_DESCRIPTION(DRIVER_DESC);
 468 MODULE_LICENSE("GPL");