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_flip_work.h>
  34 #include <drm/drm_crtc_helper.h>
  35 #include <drm/drm_plane_helper.h>
  36 #include <drm/drm_gem_cma_helper.h>
  37 #include <drm/drm_gem_framebuffer_helper.h>
  38 #include <drm/drm_fb_cma_helper.h>
  39 #include <drm/drm_rect.h>
  40 #include <drm/drm_fb_helper.h>
  41
  42 #include "meson_drv.h"
  43 #include "meson_plane.h"
  44 #include "meson_crtc.h"
  45 #include "meson_venc_cvbs.h"
  46
  47 #include "meson_vpp.h"
  48 #include "meson_viu.h"
  49 #include "meson_venc.h"
  50 #include "meson_canvas.h"
  51 #include "meson_registers.h"
  52
  53 #define DRIVER_NAME "meson"
  54 #define DRIVER_DESC "Amlogic Meson DRM driver"
  55
  56 /**
  57  * DOC: Video Processing Unit
  58  *
  59  * VPU Handles the Global Video Processing, it includes management of the
  60  * clocks gates, blocks reset lines and power domains.
  61  *
  62  * What is missing :
  63  *
  64  * - Full reset of entire video processing HW blocks
  65  * - Scaling and setup of the VPU clock
  66  * - Bus clock gates
  67  * - Powering up video processing HW blocks
  68  * - Powering Up HDMI controller and PHY
  69  */
  70
  71 static void meson_fb_output_poll_changed(struct drm_device *dev)
  72 {
  73         struct meson_drm *priv = dev->dev_private;
  74
  75         drm_fbdev_cma_hotplug_event(priv->fbdev);
  76 }
  77
  78 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
  79         .output_poll_changed = meson_fb_output_poll_changed,
  80         .atomic_check        = drm_atomic_helper_check,
  81         .atomic_commit       = drm_atomic_helper_commit,
  82         .fb_create           = drm_gem_fb_create,
  83 };
  84
  85 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
  86         .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
  87 };
  88
  89 static irqreturn_t meson_irq(int irq, void *arg)
  90 {
  91         struct drm_device *dev = arg;
  92         struct meson_drm *priv = dev->dev_private;
  93
  94         (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
  95
  96         meson_crtc_irq(priv);
  97
  98         return IRQ_HANDLED;
  99 }
 100
 101 DEFINE_DRM_GEM_CMA_FOPS(fops);
 102
 103 static struct drm_driver meson_driver = {
 104         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_GEM |
 105                                   DRIVER_MODESET | DRIVER_PRIME |
 106                                   DRIVER_ATOMIC,
 107
 108         /* IRQ */
 109         .irq_handler            = meson_irq,
 110
 111         /* PRIME Ops */
 112         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 113         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 114         .gem_prime_import       = drm_gem_prime_import,
 115         .gem_prime_export       = drm_gem_prime_export,
 116         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 117         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 118         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 119         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 120         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 121
 122         /* GEM Ops */
 123         .dumb_create            = drm_gem_cma_dumb_create,
 124         .gem_free_object_unlocked = drm_gem_cma_free_object,
 125         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 126
 127         /* Misc */
 128         .fops                   = &fops,
 129         .name                   = DRIVER_NAME,
 130         .desc                   = DRIVER_DESC,
 131         .date                   = "20161109",
 132         .major                  = 1,
 133         .minor                  = 0,
 134 };
 135
 136 static bool meson_vpu_has_available_connectors(struct device *dev)
 137 {
 138         struct device_node *ep, *remote;
 139
 140         /* Parses each endpoint and check if remote exists */
 141         for_each_endpoint_of_node(dev->of_node, ep) {
 142                 /* If the endpoint node exists, consider it enabled */
 143                 remote = of_graph_get_remote_port(ep);
 144                 if (remote) {
 145                         of_node_put(remote);
 146                         of_node_put(ep);
 147                         return true;
 148                 }
 149         }
 150
 151         return false;
 152 }
 153
 154 static struct regmap_config meson_regmap_config = {
 155         .reg_bits       = 32,
 156         .val_bits       = 32,
 157         .reg_stride     = 4,
 158         .max_register   = 0x1000,
 159 };
 160
 161 static void meson_vpu_init(struct meson_drm *priv)
 162 {
 163         writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 164         writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 165         writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 166         writel_relaxed(0x20000, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
 167 }
 168
 169 static int meson_drv_bind_master(struct device *dev, bool has_components)
 170 {
 171         struct platform_device *pdev = to_platform_device(dev);
 172         struct meson_drm *priv;
 173         struct drm_device *drm;
 174         struct resource *res;
 175         void __iomem *regs;
 176         int ret;
 177
 178         /* Checks if an output connector is available */
 179         if (!meson_vpu_has_available_connectors(dev)) {
 180                 dev_err(dev, "No output connector available\n");
 181                 return -ENODEV;
 182         }
 183
 184         drm = drm_dev_alloc(&meson_driver, dev);
 185         if (IS_ERR(drm))
 186                 return PTR_ERR(drm);
 187
 188         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 189         if (!priv) {
 190                 ret = -ENOMEM;
 191                 goto free_drm;
 192         }
 193         drm->dev_private = priv;
 194         priv->drm = drm;
 195         priv->dev = dev;
 196
 197         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
 198         regs = devm_ioremap_resource(dev, res);
 199         if (IS_ERR(regs)) {
 200                 ret = PTR_ERR(regs);
 201                 goto free_drm;
 202         }
 203
 204         priv->io_base = regs;
 205
 206         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 207         if (!res) {
 208                 ret = -EINVAL;
 209                 goto free_drm;
 210         }
 211         /* Simply ioremap since it may be a shared register zone */
 212         regs = devm_ioremap(dev, res->start, resource_size(res));
 213         if (!regs) {
 214                 ret = -EADDRNOTAVAIL;
 215                 goto free_drm;
 216         }
 217
 218         priv->hhi = devm_regmap_init_mmio(dev, regs,
 219                                           &meson_regmap_config);
 220         if (IS_ERR(priv->hhi)) {
 221                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 222                 ret = PTR_ERR(priv->hhi);
 223                 goto free_drm;
 224         }
 225
 226         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
 227         if (!res) {
 228                 ret = -EINVAL;
 229                 goto free_drm;
 230         }
 231         /* Simply ioremap since it may be a shared register zone */
 232         regs = devm_ioremap(dev, res->start, resource_size(res));
 233         if (!regs) {
 234                 ret = -EADDRNOTAVAIL;
 235                 goto free_drm;
 236         }
 237
 238         priv->dmc = devm_regmap_init_mmio(dev, regs,
 239                                           &meson_regmap_config);
 240         if (IS_ERR(priv->dmc)) {
 241                 dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
 242                 ret = PTR_ERR(priv->dmc);
 243                 goto free_drm;
 244         }
 245
 246         priv->vsync_irq = platform_get_irq(pdev, 0);
 247
 248         ret = drm_vblank_init(drm, 1);
 249         if (ret)
 250                 goto free_drm;
 251
 252         drm_mode_config_init(drm);
 253         drm->mode_config.max_width = 3840;
 254         drm->mode_config.max_height = 2160;
 255         drm->mode_config.funcs = &meson_mode_config_funcs;
 256         drm->mode_config.helper_private = &meson_mode_config_helpers;
 257
 258         /* Hardware Initialization */
 259
 260         meson_vpu_init(priv);
 261         meson_venc_init(priv);
 262         meson_vpp_init(priv);
 263         meson_viu_init(priv);
 264
 265         /* Encoder Initialization */
 266
 267         ret = meson_venc_cvbs_create(priv);
 268         if (ret)
 269                 goto free_drm;
 270
 271         if (has_components) {
 272                 ret = component_bind_all(drm->dev, drm);
 273                 if (ret) {
 274                         dev_err(drm->dev, "Couldn't bind all components\n");
 275                         goto free_drm;
 276                 }
 277         }
 278
 279         ret = meson_plane_create(priv);
 280         if (ret)
 281                 goto free_drm;
 282
 283         ret = meson_crtc_create(priv);
 284         if (ret)
 285                 goto free_drm;
 286
 287         ret = drm_irq_install(drm, priv->vsync_irq);
 288         if (ret)
 289                 goto free_drm;
 290
 291         drm_mode_config_reset(drm);
 292
 293         priv->fbdev = drm_fbdev_cma_init(drm, 32,
 294                                          drm->mode_config.num_connector);
 295         if (IS_ERR(priv->fbdev)) {
 296                 ret = PTR_ERR(priv->fbdev);
 297                 goto free_drm;
 298         }
 299
 300         drm_kms_helper_poll_init(drm);
 301
 302         platform_set_drvdata(pdev, priv);
 303
 304         ret = drm_dev_register(drm, 0);
 305         if (ret)
 306                 goto uninstall_irq;
 307
 308         return 0;
 309
 310 uninstall_irq:
 311         drm_irq_uninstall(drm);
 312 free_drm:
 313         drm_dev_put(drm);
 314
 315         return ret;
 316 }
 317
 318 static int meson_drv_bind(struct device *dev)
 319 {
 320         return meson_drv_bind_master(dev, true);
 321 }
 322
 323 static void meson_drv_unbind(struct device *dev)
 324 {
 325         struct meson_drm *priv = dev_get_drvdata(dev);
 326         struct drm_device *drm = priv->drm;
 327
 328         drm_dev_unregister(drm);
 329         drm_irq_uninstall(drm);
 330         drm_kms_helper_poll_fini(drm);
 331         drm_fbdev_cma_fini(priv->fbdev);
 332         drm_mode_config_cleanup(drm);
 333         drm_dev_put(drm);
 334
 335 }
 336
 337 static const struct component_master_ops meson_drv_master_ops = {
 338         .bind   = meson_drv_bind,
 339         .unbind = meson_drv_unbind,
 340 };
 341
 342 static int compare_of(struct device *dev, void *data)
 343 {
 344         DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
 345                          dev->of_node, data);
 346
 347         return dev->of_node == data;
 348 }
 349
 350 /* Possible connectors nodes to ignore */
 351 static const struct of_device_id connectors_match[] = {
 352         { .compatible = "composite-video-connector" },
 353         { .compatible = "svideo-connector" },
 354         { .compatible = "hdmi-connector" },
 355         { .compatible = "dvi-connector" },
 356         {}
 357 };
 358
 359 static int meson_probe_remote(struct platform_device *pdev,
 360                               struct component_match **match,
 361                               struct device_node *parent,
 362                               struct device_node *remote)
 363 {
 364         struct device_node *ep, *remote_node;
 365         int count = 1;
 366
 367         /* If node is a connector, return and do not add to match table */
 368         if (of_match_node(connectors_match, remote))
 369                 return 1;
 370
 371         component_match_add(&pdev->dev, match, compare_of, remote);
 372
 373         for_each_endpoint_of_node(remote, ep) {
 374                 remote_node = of_graph_get_remote_port_parent(ep);
 375                 if (!remote_node ||
 376                     remote_node == parent || /* Ignore parent endpoint */
 377                     !of_device_is_available(remote_node)) {
 378                         of_node_put(remote_node);
 379                         continue;
 380                 }
 381
 382                 count += meson_probe_remote(pdev, match, remote, remote_node);
 383
 384                 of_node_put(remote_node);
 385         }
 386
 387         return count;
 388 }
 389
 390 static void meson_drv_shutdown(struct platform_device *pdev)
 391 {
 392         struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
 393
 394         if (!priv)
 395                 return;
 396
 397         drm_kms_helper_poll_fini(priv->drm);
 398         drm_atomic_helper_shutdown(priv->drm);
 399 }
 400
 401 static int meson_drv_probe(struct platform_device *pdev)
 402 {
 403         struct component_match *match = NULL;
 404         struct device_node *np = pdev->dev.of_node;
 405         struct device_node *ep, *remote;
 406         int count = 0;
 407
 408         for_each_endpoint_of_node(np, ep) {
 409                 remote = of_graph_get_remote_port_parent(ep);
 410                 if (!remote || !of_device_is_available(remote)) {
 411                         of_node_put(remote);
 412                         continue;
 413                 }
 414
 415                 count += meson_probe_remote(pdev, &match, np, remote);
 416                 of_node_put(remote);
 417         }
 418
 419         if (count && !match)
 420                 return meson_drv_bind_master(&pdev->dev, false);
 421
 422         /* If some endpoints were found, initialize the nodes */
 423         if (count) {
 424                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 425
 426                 return component_master_add_with_match(&pdev->dev,
 427                                                        &meson_drv_master_ops,
 428                                                        match);
 429         }
 430
 431         /* If no output endpoints were available, simply bail out */
 432         return 0;
 433 };
 434
 435 static const struct of_device_id dt_match[] = {
 436         { .compatible = "amlogic,meson-gxbb-vpu" },
 437         { .compatible = "amlogic,meson-gxl-vpu" },
 438         { .compatible = "amlogic,meson-gxm-vpu" },
 439         {}
 440 };
 441 MODULE_DEVICE_TABLE(of, dt_match);
 442
 443 static struct platform_driver meson_drm_platform_driver = {
 444         .probe      = meson_drv_probe,
 445         .shutdown   = meson_drv_shutdown,
 446         .driver     = {
 447                 .name   = "meson-drm",
 448                 .of_match_table = dt_match,
 449         },
 450 };
 451
 452 module_platform_driver(meson_drm_platform_driver);
 453
 454 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
 455 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
 456 MODULE_DESCRIPTION(DRIVER_DESC);
 457 MODULE_LICENSE("GPL");