drivers/gpu/drm/meson/meson_drv.c

   1 /*
   2  * Copyright (C) 2016 BayLibre, SAS
   3  * Author: Neil Armstrong <narmstrong@baylibre.com>
   4  * Copyright (C) 2014 Endless Mobile
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  * Written by:
  20  *     Jasper St. Pierre <jstpierre@mecheye.net>
  21  */
  22
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/mutex.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/component.h>
  28 #include <linux/of_graph.h>
  29
  30 #include <drm/drmP.h>
  31 #include <drm/drm_atomic.h>
  32 #include <drm/drm_atomic_helper.h>
  33 #include <drm/drm_fb_cma_helper.h>
  34 #include <drm/drm_fb_helper.h>
  35 #include <drm/drm_flip_work.h>
  36 #include <drm/drm_gem_cma_helper.h>
  37 #include <drm/drm_gem_framebuffer_helper.h>
  38 #include <drm/drm_plane_helper.h>
  39 #include <drm/drm_probe_helper.h>
  40 #include <drm/drm_rect.h>
  41
  42 #include "meson_drv.h"
  43 #include "meson_plane.h"
  44 #include "meson_overlay.h"
  45 #include "meson_crtc.h"
  46 #include "meson_venc_cvbs.h"
  47
  48 #include "meson_vpp.h"
  49 #include "meson_viu.h"
  50 #include "meson_venc.h"
  51 #include "meson_canvas.h"
  52 #include "meson_registers.h"
  53
  54 #define DRIVER_NAME "meson"
  55 #define DRIVER_DESC "Amlogic Meson DRM driver"
  56
  57 /**
  58  * DOC: Video Processing Unit
  59  *
  60  * VPU Handles the Global Video Processing, it includes management of the
  61  * clocks gates, blocks reset lines and power domains.
  62  *
  63  * What is missing :
  64  *
  65  * - Full reset of entire video processing HW blocks
  66  * - Scaling and setup of the VPU clock
  67  * - Bus clock gates
  68  * - Powering up video processing HW blocks
  69  * - Powering Up HDMI controller and PHY
  70  */
  71
  72 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
  73         .atomic_check        = drm_atomic_helper_check,
  74         .atomic_commit       = drm_atomic_helper_commit,
  75         .fb_create           = drm_gem_fb_create,
  76 };
  77
  78 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
  79         .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
  80 };
  81
  82 static irqreturn_t meson_irq(int irq, void *arg)
  83 {
  84         struct drm_device *dev = arg;
  85         struct meson_drm *priv = dev->dev_private;
  86
  87         (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
  88
  89         meson_crtc_irq(priv);
  90
  91         return IRQ_HANDLED;
  92 }
  93
  94 DEFINE_DRM_GEM_CMA_FOPS(fops);
  95
  96 static struct drm_driver meson_driver = {
  97         .driver_features        = DRIVER_GEM |
  98                                   DRIVER_MODESET | DRIVER_PRIME |
  99                                   DRIVER_ATOMIC,
 100
 101         /* IRQ */
 102         .irq_handler            = meson_irq,
 103
 104         /* PRIME Ops */
 105         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 106         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 107         .gem_prime_import       = drm_gem_prime_import,
 108         .gem_prime_export       = drm_gem_prime_export,
 109         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 110         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 111         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 112         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 113         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 114
 115         /* GEM Ops */
 116         .dumb_create            = drm_gem_cma_dumb_create,
 117         .gem_free_object_unlocked = drm_gem_cma_free_object,
 118         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 119
 120         /* Misc */
 121         .fops                   = &fops,
 122         .name                   = DRIVER_NAME,
 123         .desc                   = DRIVER_DESC,
 124         .date                   = "20161109",
 125         .major                  = 1,
 126         .minor                  = 0,
 127 };
 128
 129 static bool meson_vpu_has_available_connectors(struct device *dev)
 130 {
 131         struct device_node *ep, *remote;
 132
 133         /* Parses each endpoint and check if remote exists */
 134         for_each_endpoint_of_node(dev->of_node, ep) {
 135                 /* If the endpoint node exists, consider it enabled */
 136                 remote = of_graph_get_remote_port(ep);
 137                 if (remote)
 138                         return true;
 139         }
 140
 141         return false;
 142 }
 143
 144 static struct regmap_config meson_regmap_config = {
 145         .reg_bits       = 32,
 146         .val_bits       = 32,
 147         .reg_stride     = 4,
 148         .max_register   = 0x1000,
 149 };
 150
 151 static void meson_vpu_init(struct meson_drm *priv)
 152 {
 153         writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 154         writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 155         writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 156         writel_relaxed(0x20000, 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 static int meson_drv_bind_master(struct device *dev, bool has_components)
 177 {
 178         struct platform_device *pdev = to_platform_device(dev);
 179         struct meson_drm *priv;
 180         struct drm_device *drm;
 181         struct resource *res;
 182         void __iomem *regs;
 183         int ret;
 184
 185         /* Checks if an output connector is available */
 186         if (!meson_vpu_has_available_connectors(dev)) {
 187                 dev_err(dev, "No output connector available\n");
 188                 return -ENODEV;
 189         }
 190
 191         drm = drm_dev_alloc(&meson_driver, dev);
 192         if (IS_ERR(drm))
 193                 return PTR_ERR(drm);
 194
 195         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 196         if (!priv) {
 197                 ret = -ENOMEM;
 198                 goto free_drm;
 199         }
 200         drm->dev_private = priv;
 201         priv->drm = drm;
 202         priv->dev = dev;
 203
 204         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
 205         regs = devm_ioremap_resource(dev, res);
 206         if (IS_ERR(regs)) {
 207                 ret = PTR_ERR(regs);
 208                 goto free_drm;
 209         }
 210
 211         priv->io_base = regs;
 212
 213         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 214         if (!res) {
 215                 ret = -EINVAL;
 216                 goto free_drm;
 217         }
 218         /* Simply ioremap since it may be a shared register zone */
 219         regs = devm_ioremap(dev, res->start, resource_size(res));
 220         if (!regs) {
 221                 ret = -EADDRNOTAVAIL;
 222                 goto free_drm;
 223         }
 224
 225         priv->hhi = devm_regmap_init_mmio(dev, regs,
 226                                           &meson_regmap_config);
 227         if (IS_ERR(priv->hhi)) {
 228                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 229                 ret = PTR_ERR(priv->hhi);
 230                 goto free_drm;
 231         }
 232
 233         priv->canvas = meson_canvas_get(dev);
 234         if (!IS_ERR(priv->canvas)) {
 235                 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
 236                 if (ret)
 237                         goto free_drm;
 238                 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
 239                 if (ret) {
 240                         meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 241                         goto free_drm;
 242                 }
 243                 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
 244                 if (ret) {
 245                         meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 246                         meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 247                         goto free_drm;
 248                 }
 249                 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
 250                 if (ret) {
 251                         meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 252                         meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 253                         meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 254                         goto free_drm;
 255                 }
 256         } else {
 257                 priv->canvas = NULL;
 258
 259                 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
 260                 if (!res) {
 261                         ret = -EINVAL;
 262                         goto free_drm;
 263                 }
 264                 /* Simply ioremap since it may be a shared register zone */
 265                 regs = devm_ioremap(dev, res->start, resource_size(res));
 266                 if (!regs) {
 267                         ret = -EADDRNOTAVAIL;
 268                         goto free_drm;
 269                 }
 270
 271                 priv->dmc = devm_regmap_init_mmio(dev, regs,
 272                                                   &meson_regmap_config);
 273                 if (IS_ERR(priv->dmc)) {
 274                         dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
 275                         ret = PTR_ERR(priv->dmc);
 276                         goto free_drm;
 277                 }
 278         }
 279
 280         priv->vsync_irq = platform_get_irq(pdev, 0);
 281
 282         ret = drm_vblank_init(drm, 1);
 283         if (ret)
 284                 goto free_drm;
 285
 286         /* Remove early framebuffers (ie. simplefb) */
 287         meson_remove_framebuffers();
 288
 289         drm_mode_config_init(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
 302         /* Encoder Initialization */
 303
 304         ret = meson_venc_cvbs_create(priv);
 305         if (ret)
 306                 goto free_drm;
 307
 308         if (has_components) {
 309                 ret = component_bind_all(drm->dev, drm);
 310                 if (ret) {
 311                         dev_err(drm->dev, "Couldn't bind all components\n");
 312                         goto free_drm;
 313                 }
 314         }
 315
 316         ret = meson_plane_create(priv);
 317         if (ret)
 318                 goto free_drm;
 319
 320         ret = meson_overlay_create(priv);
 321         if (ret)
 322                 goto free_drm;
 323
 324         ret = meson_crtc_create(priv);
 325         if (ret)
 326                 goto free_drm;
 327
 328         ret = drm_irq_install(drm, priv->vsync_irq);
 329         if (ret)
 330                 goto free_drm;
 331
 332         drm_mode_config_reset(drm);
 333
 334         drm_kms_helper_poll_init(drm);
 335
 336         platform_set_drvdata(pdev, priv);
 337
 338         ret = drm_dev_register(drm, 0);
 339         if (ret)
 340                 goto uninstall_irq;
 341
 342         drm_fbdev_generic_setup(drm, 32);
 343
 344         return 0;
 345
 346 uninstall_irq:
 347         drm_irq_uninstall(drm);
 348 free_drm:
 349         drm_dev_put(drm);
 350
 351         return ret;
 352 }
 353
 354 static int meson_drv_bind(struct device *dev)
 355 {
 356         return meson_drv_bind_master(dev, true);
 357 }
 358
 359 static void meson_drv_unbind(struct device *dev)
 360 {
 361         struct meson_drm *priv = dev_get_drvdata(dev);
 362         struct drm_device *drm = priv->drm;
 363
 364         if (priv->canvas) {
 365                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 366                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 367                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 368                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 369         }
 370
 371         drm_dev_unregister(drm);
 372         drm_irq_uninstall(drm);
 373         drm_kms_helper_poll_fini(drm);
 374         drm_mode_config_cleanup(drm);
 375         drm_dev_put(drm);
 376
 377 }
 378
 379 static const struct component_master_ops meson_drv_master_ops = {
 380         .bind   = meson_drv_bind,
 381         .unbind = meson_drv_unbind,
 382 };
 383
 384 static int compare_of(struct device *dev, void *data)
 385 {
 386         DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
 387                          dev->of_node, data);
 388
 389         return dev->of_node == data;
 390 }
 391
 392 /* Possible connectors nodes to ignore */
 393 static const struct of_device_id connectors_match[] = {
 394         { .compatible = "composite-video-connector" },
 395         { .compatible = "svideo-connector" },
 396         { .compatible = "hdmi-connector" },
 397         { .compatible = "dvi-connector" },
 398         {}
 399 };
 400
 401 static int meson_probe_remote(struct platform_device *pdev,
 402                               struct component_match **match,
 403                               struct device_node *parent,
 404                               struct device_node *remote)
 405 {
 406         struct device_node *ep, *remote_node;
 407         int count = 1;
 408
 409         /* If node is a connector, return and do not add to match table */
 410         if (of_match_node(connectors_match, remote))
 411                 return 1;
 412
 413         component_match_add(&pdev->dev, match, compare_of, remote);
 414
 415         for_each_endpoint_of_node(remote, ep) {
 416                 remote_node = of_graph_get_remote_port_parent(ep);
 417                 if (!remote_node ||
 418                     remote_node == parent || /* Ignore parent endpoint */
 419                     !of_device_is_available(remote_node)) {
 420                         of_node_put(remote_node);
 421                         continue;
 422                 }
 423
 424                 count += meson_probe_remote(pdev, match, remote, remote_node);
 425
 426                 of_node_put(remote_node);
 427         }
 428
 429         return count;
 430 }
 431
 432 static int meson_drv_probe(struct platform_device *pdev)
 433 {
 434         struct component_match *match = NULL;
 435         struct device_node *np = pdev->dev.of_node;
 436         struct device_node *ep, *remote;
 437         int count = 0;
 438
 439         for_each_endpoint_of_node(np, ep) {
 440                 remote = of_graph_get_remote_port_parent(ep);
 441                 if (!remote || !of_device_is_available(remote)) {
 442                         of_node_put(remote);
 443                         continue;
 444                 }
 445
 446                 count += meson_probe_remote(pdev, &match, np, remote);
 447                 of_node_put(remote);
 448         }
 449
 450         if (count && !match)
 451                 return meson_drv_bind_master(&pdev->dev, false);
 452
 453         /* If some endpoints were found, initialize the nodes */
 454         if (count) {
 455                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 456
 457                 return component_master_add_with_match(&pdev->dev,
 458                                                        &meson_drv_master_ops,
 459                                                        match);
 460         }
 461
 462         /* If no output endpoints were available, simply bail out */
 463         return 0;
 464 };
 465
 466 static const struct of_device_id dt_match[] = {
 467         { .compatible = "amlogic,meson-gxbb-vpu" },
 468         { .compatible = "amlogic,meson-gxl-vpu" },
 469         { .compatible = "amlogic,meson-gxm-vpu" },
 470         {}
 471 };
 472 MODULE_DEVICE_TABLE(of, dt_match);
 473
 474 static struct platform_driver meson_drm_platform_driver = {
 475         .probe      = meson_drv_probe,
 476         .driver     = {
 477                 .name   = "meson-drm",
 478                 .of_match_table = dt_match,
 479         },
 480 };
 481
 482 module_platform_driver(meson_drm_platform_driver);
 483
 484 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
 485 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
 486 MODULE_DESCRIPTION(DRIVER_DESC);
 487 MODULE_LICENSE("GPL");