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                         return true;
 146         }
 147
 148         return false;
 149 }
 150
 151 static struct regmap_config meson_regmap_config = {
 152         .reg_bits       = 32,
 153         .val_bits       = 32,
 154         .reg_stride     = 4,
 155         .max_register   = 0x1000,
 156 };
 157
 158 static void meson_vpu_init(struct meson_drm *priv)
 159 {
 160         writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 161         writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 162         writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 163         writel_relaxed(0x20000, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
 164 }
 165
 166 static int meson_drv_bind_master(struct device *dev, bool has_components)
 167 {
 168         struct platform_device *pdev = to_platform_device(dev);
 169         struct meson_drm *priv;
 170         struct drm_device *drm;
 171         struct resource *res;
 172         void __iomem *regs;
 173         int ret;
 174
 175         /* Checks if an output connector is available */
 176         if (!meson_vpu_has_available_connectors(dev)) {
 177                 dev_err(dev, "No output connector available\n");
 178                 return -ENODEV;
 179         }
 180
 181         drm = drm_dev_alloc(&meson_driver, dev);
 182         if (IS_ERR(drm))
 183                 return PTR_ERR(drm);
 184
 185         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 186         if (!priv) {
 187                 ret = -ENOMEM;
 188                 goto free_drm;
 189         }
 190         drm->dev_private = priv;
 191         priv->drm = drm;
 192         priv->dev = dev;
 193
 194         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
 195         regs = devm_ioremap_resource(dev, res);
 196         if (IS_ERR(regs)) {
 197                 ret = PTR_ERR(regs);
 198                 goto free_drm;
 199         }
 200
 201         priv->io_base = regs;
 202
 203         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 204         if (!res) {
 205                 ret = -EINVAL;
 206                 goto free_drm;
 207         }
 208         /* Simply ioremap since it may be a shared register zone */
 209         regs = devm_ioremap(dev, res->start, resource_size(res));
 210         if (!regs) {
 211                 ret = -EADDRNOTAVAIL;
 212                 goto free_drm;
 213         }
 214
 215         priv->hhi = devm_regmap_init_mmio(dev, regs,
 216                                           &meson_regmap_config);
 217         if (IS_ERR(priv->hhi)) {
 218                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 219                 ret = PTR_ERR(priv->hhi);
 220                 goto free_drm;
 221         }
 222
 223         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
 224         if (!res) {
 225                 ret = -EINVAL;
 226                 goto free_drm;
 227         }
 228         /* Simply ioremap since it may be a shared register zone */
 229         regs = devm_ioremap(dev, res->start, resource_size(res));
 230         if (!regs) {
 231                 ret = -EADDRNOTAVAIL;
 232                 goto free_drm;
 233         }
 234
 235         priv->dmc = devm_regmap_init_mmio(dev, regs,
 236                                           &meson_regmap_config);
 237         if (IS_ERR(priv->dmc)) {
 238                 dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
 239                 ret = PTR_ERR(priv->dmc);
 240                 goto free_drm;
 241         }
 242
 243         priv->vsync_irq = platform_get_irq(pdev, 0);
 244
 245         ret = drm_vblank_init(drm, 1);
 246         if (ret)
 247                 goto free_drm;
 248
 249         drm_mode_config_init(drm);
 250         drm->mode_config.max_width = 3840;
 251         drm->mode_config.max_height = 2160;
 252         drm->mode_config.funcs = &meson_mode_config_funcs;
 253         drm->mode_config.helper_private = &meson_mode_config_helpers;
 254
 255         /* Hardware Initialization */
 256
 257         meson_vpu_init(priv);
 258         meson_venc_init(priv);
 259         meson_vpp_init(priv);
 260         meson_viu_init(priv);
 261
 262         /* Encoder Initialization */
 263
 264         ret = meson_venc_cvbs_create(priv);
 265         if (ret)
 266                 goto free_drm;
 267
 268         if (has_components) {
 269                 ret = component_bind_all(drm->dev, drm);
 270                 if (ret) {
 271                         dev_err(drm->dev, "Couldn't bind all components\n");
 272                         goto free_drm;
 273                 }
 274         }
 275
 276         ret = meson_plane_create(priv);
 277         if (ret)
 278                 goto free_drm;
 279
 280         ret = meson_crtc_create(priv);
 281         if (ret)
 282                 goto free_drm;
 283
 284         ret = drm_irq_install(drm, priv->vsync_irq);
 285         if (ret)
 286                 goto free_drm;
 287
 288         drm_mode_config_reset(drm);
 289
 290         priv->fbdev = drm_fbdev_cma_init(drm, 32,
 291                                          drm->mode_config.num_connector);
 292         if (IS_ERR(priv->fbdev)) {
 293                 ret = PTR_ERR(priv->fbdev);
 294                 goto free_drm;
 295         }
 296
 297         drm_kms_helper_poll_init(drm);
 298
 299         platform_set_drvdata(pdev, priv);
 300
 301         ret = drm_dev_register(drm, 0);
 302         if (ret)
 303                 goto uninstall_irq;
 304
 305         return 0;
 306
 307 uninstall_irq:
 308         drm_irq_uninstall(drm);
 309 free_drm:
 310         drm_dev_put(drm);
 311
 312         return ret;
 313 }
 314
 315 static int meson_drv_bind(struct device *dev)
 316 {
 317         return meson_drv_bind_master(dev, true);
 318 }
 319
 320 static void meson_drv_unbind(struct device *dev)
 321 {
 322         struct meson_drm *priv = dev_get_drvdata(dev);
 323         struct drm_device *drm = priv->drm;
 324
 325         drm_dev_unregister(drm);
 326         drm_irq_uninstall(drm);
 327         drm_kms_helper_poll_fini(drm);
 328         drm_fbdev_cma_fini(priv->fbdev);
 329         drm_mode_config_cleanup(drm);
 330         drm_dev_put(drm);
 331
 332 }
 333
 334 static const struct component_master_ops meson_drv_master_ops = {
 335         .bind   = meson_drv_bind,
 336         .unbind = meson_drv_unbind,
 337 };
 338
 339 static int compare_of(struct device *dev, void *data)
 340 {
 341         DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
 342                          dev->of_node, data);
 343
 344         return dev->of_node == data;
 345 }
 346
 347 /* Possible connectors nodes to ignore */
 348 static const struct of_device_id connectors_match[] = {
 349         { .compatible = "composite-video-connector" },
 350         { .compatible = "svideo-connector" },
 351         { .compatible = "hdmi-connector" },
 352         { .compatible = "dvi-connector" },
 353         {}
 354 };
 355
 356 static int meson_probe_remote(struct platform_device *pdev,
 357                               struct component_match **match,
 358                               struct device_node *parent,
 359                               struct device_node *remote)
 360 {
 361         struct device_node *ep, *remote_node;
 362         int count = 1;
 363
 364         /* If node is a connector, return and do not add to match table */
 365         if (of_match_node(connectors_match, remote))
 366                 return 1;
 367
 368         component_match_add(&pdev->dev, match, compare_of, remote);
 369
 370         for_each_endpoint_of_node(remote, ep) {
 371                 remote_node = of_graph_get_remote_port_parent(ep);
 372                 if (!remote_node ||
 373                     remote_node == parent || /* Ignore parent endpoint */
 374                     !of_device_is_available(remote_node)) {
 375                         of_node_put(remote_node);
 376                         continue;
 377                 }
 378
 379                 count += meson_probe_remote(pdev, match, remote, remote_node);
 380
 381                 of_node_put(remote_node);
 382         }
 383
 384         return count;
 385 }
 386
 387 static void meson_drv_shutdown(struct platform_device *pdev)
 388 {
 389         struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
 390
 391         if (!priv)
 392                 return;
 393
 394         drm_kms_helper_poll_fini(priv->drm);
 395         drm_atomic_helper_shutdown(priv->drm);
 396 }
 397
 398 static int meson_drv_probe(struct platform_device *pdev)
 399 {
 400         struct component_match *match = NULL;
 401         struct device_node *np = pdev->dev.of_node;
 402         struct device_node *ep, *remote;
 403         int count = 0;
 404
 405         for_each_endpoint_of_node(np, ep) {
 406                 remote = of_graph_get_remote_port_parent(ep);
 407                 if (!remote || !of_device_is_available(remote)) {
 408                         of_node_put(remote);
 409                         continue;
 410                 }
 411
 412                 count += meson_probe_remote(pdev, &match, np, remote);
 413                 of_node_put(remote);
 414         }
 415
 416         if (count && !match)
 417                 return meson_drv_bind_master(&pdev->dev, false);
 418
 419         /* If some endpoints were found, initialize the nodes */
 420         if (count) {
 421                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 422
 423                 return component_master_add_with_match(&pdev->dev,
 424                                                        &meson_drv_master_ops,
 425                                                        match);
 426         }
 427
 428         /* If no output endpoints were available, simply bail out */
 429         return 0;
 430 };
 431
 432 static const struct of_device_id dt_match[] = {
 433         { .compatible = "amlogic,meson-gxbb-vpu" },
 434         { .compatible = "amlogic,meson-gxl-vpu" },
 435         { .compatible = "amlogic,meson-gxm-vpu" },
 436         {}
 437 };
 438 MODULE_DEVICE_TABLE(of, dt_match);
 439
 440 static struct platform_driver meson_drm_platform_driver = {
 441         .probe      = meson_drv_probe,
 442         .shutdown   = meson_drv_shutdown,
 443         .driver     = {
 444                 .name   = "meson-drm",
 445                 .of_match_table = dt_match,
 446         },
 447 };
 448
 449 module_platform_driver(meson_drm_platform_driver);
 450
 451 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
 452 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
 453 MODULE_DESCRIPTION(DRIVER_DESC);
 454 MODULE_LICENSE("GPL");