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_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 irqreturn_t meson_irq(int irq, void *arg)
  79 {
  80         struct drm_device *dev = arg;
  81         struct meson_drm *priv = dev->dev_private;
  82
  83         (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
  84
  85         meson_crtc_irq(priv);
  86
  87         return IRQ_HANDLED;
  88 }
  89
  90 DEFINE_DRM_GEM_CMA_FOPS(fops);
  91
  92 static struct drm_driver meson_driver = {
  93         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_GEM |
  94                                   DRIVER_MODESET | DRIVER_PRIME |
  95                                   DRIVER_ATOMIC,
  96
  97         /* IRQ */
  98         .irq_handler            = meson_irq,
  99
 100         /* PRIME Ops */
 101         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 102         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 103         .gem_prime_import       = drm_gem_prime_import,
 104         .gem_prime_export       = drm_gem_prime_export,
 105         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 106         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 107         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 108         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 109         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 110
 111         /* GEM Ops */
 112         .dumb_create            = drm_gem_cma_dumb_create,
 113         .gem_free_object_unlocked = drm_gem_cma_free_object,
 114         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 115
 116         /* Misc */
 117         .fops                   = &fops,
 118         .name                   = DRIVER_NAME,
 119         .desc                   = DRIVER_DESC,
 120         .date                   = "20161109",
 121         .major                  = 1,
 122         .minor                  = 0,
 123 };
 124
 125 static bool meson_vpu_has_available_connectors(struct device *dev)
 126 {
 127         struct device_node *ep, *remote;
 128
 129         /* Parses each endpoint and check if remote exists */
 130         for_each_endpoint_of_node(dev->of_node, ep) {
 131                 /* If the endpoint node exists, consider it enabled */
 132                 remote = of_graph_get_remote_port(ep);
 133                 if (remote)
 134                         return true;
 135         }
 136
 137         return false;
 138 }
 139
 140 static struct regmap_config meson_regmap_config = {
 141         .reg_bits       = 32,
 142         .val_bits       = 32,
 143         .reg_stride     = 4,
 144         .max_register   = 0x1000,
 145 };
 146
 147 static void meson_vpu_init(struct meson_drm *priv)
 148 {
 149         writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 150         writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 151         writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 152         writel_relaxed(0x20000, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
 153 }
 154
 155 static int meson_drv_bind_master(struct device *dev, bool has_components)
 156 {
 157         struct platform_device *pdev = to_platform_device(dev);
 158         struct meson_drm *priv;
 159         struct drm_device *drm;
 160         struct resource *res;
 161         void __iomem *regs;
 162         int ret;
 163
 164         /* Checks if an output connector is available */
 165         if (!meson_vpu_has_available_connectors(dev)) {
 166                 dev_err(dev, "No output connector available\n");
 167                 return -ENODEV;
 168         }
 169
 170         drm = drm_dev_alloc(&meson_driver, dev);
 171         if (IS_ERR(drm))
 172                 return PTR_ERR(drm);
 173
 174         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 175         if (!priv) {
 176                 ret = -ENOMEM;
 177                 goto free_drm;
 178         }
 179         drm->dev_private = priv;
 180         priv->drm = drm;
 181         priv->dev = dev;
 182
 183         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
 184         regs = devm_ioremap_resource(dev, res);
 185         if (IS_ERR(regs)) {
 186                 ret = PTR_ERR(regs);
 187                 goto free_drm;
 188         }
 189
 190         priv->io_base = regs;
 191
 192         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 193         if (!res) {
 194                 ret = -EINVAL;
 195                 goto free_drm;
 196         }
 197         /* Simply ioremap since it may be a shared register zone */
 198         regs = devm_ioremap(dev, res->start, resource_size(res));
 199         if (!regs) {
 200                 ret = -EADDRNOTAVAIL;
 201                 goto free_drm;
 202         }
 203
 204         priv->hhi = devm_regmap_init_mmio(dev, regs,
 205                                           &meson_regmap_config);
 206         if (IS_ERR(priv->hhi)) {
 207                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 208                 ret = PTR_ERR(priv->hhi);
 209                 goto free_drm;
 210         }
 211
 212         priv->canvas = meson_canvas_get(dev);
 213         if (!IS_ERR(priv->canvas)) {
 214                 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
 215                 if (ret)
 216                         goto free_drm;
 217                 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
 218                 if (ret) {
 219                         meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 220                         goto free_drm;
 221                 }
 222                 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
 223                 if (ret) {
 224                         meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 225                         meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 226                         goto free_drm;
 227                 }
 228                 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
 229                 if (ret) {
 230                         meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 231                         meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 232                         meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 233                         goto free_drm;
 234                 }
 235         } else {
 236                 priv->canvas = NULL;
 237
 238                 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
 239                 if (!res) {
 240                         ret = -EINVAL;
 241                         goto free_drm;
 242                 }
 243                 /* Simply ioremap since it may be a shared register zone */
 244                 regs = devm_ioremap(dev, res->start, resource_size(res));
 245                 if (!regs) {
 246                         ret = -EADDRNOTAVAIL;
 247                         goto free_drm;
 248                 }
 249
 250                 priv->dmc = devm_regmap_init_mmio(dev, regs,
 251                                                   &meson_regmap_config);
 252                 if (IS_ERR(priv->dmc)) {
 253                         dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
 254                         ret = PTR_ERR(priv->dmc);
 255                         goto free_drm;
 256                 }
 257         }
 258
 259         priv->vsync_irq = platform_get_irq(pdev, 0);
 260
 261         ret = drm_vblank_init(drm, 1);
 262         if (ret)
 263                 goto free_drm;
 264
 265         drm_mode_config_init(drm);
 266         drm->mode_config.max_width = 3840;
 267         drm->mode_config.max_height = 2160;
 268         drm->mode_config.funcs = &meson_mode_config_funcs;
 269
 270         /* Hardware Initialization */
 271
 272         meson_vpu_init(priv);
 273         meson_venc_init(priv);
 274         meson_vpp_init(priv);
 275         meson_viu_init(priv);
 276
 277         /* Encoder Initialization */
 278
 279         ret = meson_venc_cvbs_create(priv);
 280         if (ret)
 281                 goto free_drm;
 282
 283         if (has_components) {
 284                 ret = component_bind_all(drm->dev, drm);
 285                 if (ret) {
 286                         dev_err(drm->dev, "Couldn't bind all components\n");
 287                         goto free_drm;
 288                 }
 289         }
 290
 291         ret = meson_plane_create(priv);
 292         if (ret)
 293                 goto free_drm;
 294
 295         ret = meson_overlay_create(priv);
 296         if (ret)
 297                 goto free_drm;
 298
 299         ret = meson_crtc_create(priv);
 300         if (ret)
 301                 goto free_drm;
 302
 303         ret = drm_irq_install(drm, priv->vsync_irq);
 304         if (ret)
 305                 goto free_drm;
 306
 307         drm_mode_config_reset(drm);
 308
 309         drm_kms_helper_poll_init(drm);
 310
 311         platform_set_drvdata(pdev, priv);
 312
 313         ret = drm_dev_register(drm, 0);
 314         if (ret)
 315                 goto free_drm;
 316
 317         drm_fbdev_generic_setup(drm, 32);
 318
 319         return 0;
 320
 321 free_drm:
 322         drm_dev_put(drm);
 323
 324         return ret;
 325 }
 326
 327 static int meson_drv_bind(struct device *dev)
 328 {
 329         return meson_drv_bind_master(dev, true);
 330 }
 331
 332 static void meson_drv_unbind(struct device *dev)
 333 {
 334         struct drm_device *drm = dev_get_drvdata(dev);
 335         struct meson_drm *priv = drm->dev_private;
 336
 337         if (priv->canvas) {
 338                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 339                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 340                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 341                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 342         }
 343
 344         drm_dev_unregister(drm);
 345         drm_kms_helper_poll_fini(drm);
 346         drm_mode_config_cleanup(drm);
 347         drm_dev_put(drm);
 348
 349 }
 350
 351 static const struct component_master_ops meson_drv_master_ops = {
 352         .bind   = meson_drv_bind,
 353         .unbind = meson_drv_unbind,
 354 };
 355
 356 static int compare_of(struct device *dev, void *data)
 357 {
 358         DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
 359                          dev->of_node, data);
 360
 361         return dev->of_node == data;
 362 }
 363
 364 /* Possible connectors nodes to ignore */
 365 static const struct of_device_id connectors_match[] = {
 366         { .compatible = "composite-video-connector" },
 367         { .compatible = "svideo-connector" },
 368         { .compatible = "hdmi-connector" },
 369         { .compatible = "dvi-connector" },
 370         {}
 371 };
 372
 373 static int meson_probe_remote(struct platform_device *pdev,
 374                               struct component_match **match,
 375                               struct device_node *parent,
 376                               struct device_node *remote)
 377 {
 378         struct device_node *ep, *remote_node;
 379         int count = 1;
 380
 381         /* If node is a connector, return and do not add to match table */
 382         if (of_match_node(connectors_match, remote))
 383                 return 1;
 384
 385         component_match_add(&pdev->dev, match, compare_of, remote);
 386
 387         for_each_endpoint_of_node(remote, ep) {
 388                 remote_node = of_graph_get_remote_port_parent(ep);
 389                 if (!remote_node ||
 390                     remote_node == parent || /* Ignore parent endpoint */
 391                     !of_device_is_available(remote_node))
 392                         continue;
 393
 394                 count += meson_probe_remote(pdev, match, remote, remote_node);
 395
 396                 of_node_put(remote_node);
 397         }
 398
 399         return count;
 400 }
 401
 402 static int meson_drv_probe(struct platform_device *pdev)
 403 {
 404         struct component_match *match = NULL;
 405         struct device_node *np = pdev->dev.of_node;
 406         struct device_node *ep, *remote;
 407         int count = 0;
 408
 409         for_each_endpoint_of_node(np, ep) {
 410                 remote = of_graph_get_remote_port_parent(ep);
 411                 if (!remote || !of_device_is_available(remote))
 412                         continue;
 413
 414                 count += meson_probe_remote(pdev, &match, np, remote);
 415         }
 416
 417         if (count && !match)
 418                 return meson_drv_bind_master(&pdev->dev, false);
 419
 420         /* If some endpoints were found, initialize the nodes */
 421         if (count) {
 422                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 423
 424                 return component_master_add_with_match(&pdev->dev,
 425                                                        &meson_drv_master_ops,
 426                                                        match);
 427         }
 428
 429         /* If no output endpoints were available, simply bail out */
 430         return 0;
 431 };
 432
 433 static const struct of_device_id dt_match[] = {
 434         { .compatible = "amlogic,meson-gxbb-vpu" },
 435         { .compatible = "amlogic,meson-gxl-vpu" },
 436         { .compatible = "amlogic,meson-gxm-vpu" },
 437         {}
 438 };
 439 MODULE_DEVICE_TABLE(of, dt_match);
 440
 441 static struct platform_driver meson_drm_platform_driver = {
 442         .probe      = meson_drv_probe,
 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");