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