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