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         .dumb_destroy           = drm_gem_dumb_destroy,
 120         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 121         .gem_free_object_unlocked = drm_gem_cma_free_object,
 122         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 123
 124         /* Misc */
 125         .fops                   = &fops,
 126         .name                   = DRIVER_NAME,
 127         .desc                   = DRIVER_DESC,
 128         .date                   = "20161109",
 129         .major                  = 1,
 130         .minor                  = 0,
 131 };
 132
 133 static bool meson_vpu_has_available_connectors(struct device *dev)
 134 {
 135         struct device_node *ep, *remote;
 136
 137         /* Parses each endpoint and check if remote exists */
 138         for_each_endpoint_of_node(dev->of_node, ep) {
 139                 /* If the endpoint node exists, consider it enabled */
 140                 remote = of_graph_get_remote_port(ep);
 141                 if (remote)
 142                         return true;
 143         }
 144
 145         return false;
 146 }
 147
 148 static struct regmap_config meson_regmap_config = {
 149         .reg_bits       = 32,
 150         .val_bits       = 32,
 151         .reg_stride     = 4,
 152         .max_register   = 0x1000,
 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                 return PTR_ERR(regs);
 187
 188         priv->io_base = regs;
 189
 190         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 191         /* Simply ioremap since it may be a shared register zone */
 192         regs = devm_ioremap(dev, res->start, resource_size(res));
 193         if (!regs)
 194                 return -EADDRNOTAVAIL;
 195
 196         priv->hhi = devm_regmap_init_mmio(dev, regs,
 197                                           &meson_regmap_config);
 198         if (IS_ERR(priv->hhi)) {
 199                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 200                 return PTR_ERR(priv->hhi);
 201         }
 202
 203         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
 204         /* Simply ioremap since it may be a shared register zone */
 205         regs = devm_ioremap(dev, res->start, resource_size(res));
 206         if (!regs)
 207                 return -EADDRNOTAVAIL;
 208
 209         priv->dmc = devm_regmap_init_mmio(dev, regs,
 210                                           &meson_regmap_config);
 211         if (IS_ERR(priv->dmc)) {
 212                 dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
 213                 return PTR_ERR(priv->dmc);
 214         }
 215
 216         priv->vsync_irq = platform_get_irq(pdev, 0);
 217
 218         drm_vblank_init(drm, 1);
 219         drm_mode_config_init(drm);
 220         drm->mode_config.max_width = 3840;
 221         drm->mode_config.max_height = 2160;
 222         drm->mode_config.funcs = &meson_mode_config_funcs;
 223
 224         /* Hardware Initialization */
 225
 226         meson_venc_init(priv);
 227         meson_vpp_init(priv);
 228         meson_viu_init(priv);
 229
 230         /* Encoder Initialization */
 231
 232         ret = meson_venc_cvbs_create(priv);
 233         if (ret)
 234                 goto free_drm;
 235
 236         if (has_components) {
 237                 ret = component_bind_all(drm->dev, drm);
 238                 if (ret) {
 239                         dev_err(drm->dev, "Couldn't bind all components\n");
 240                         goto free_drm;
 241                 }
 242         }
 243
 244         ret = meson_plane_create(priv);
 245         if (ret)
 246                 goto free_drm;
 247
 248         ret = meson_crtc_create(priv);
 249         if (ret)
 250                 goto free_drm;
 251
 252         ret = drm_irq_install(drm, priv->vsync_irq);
 253         if (ret)
 254                 goto free_drm;
 255
 256         drm_mode_config_reset(drm);
 257
 258         priv->fbdev = drm_fbdev_cma_init(drm, 32,
 259                                          drm->mode_config.num_connector);
 260         if (IS_ERR(priv->fbdev)) {
 261                 ret = PTR_ERR(priv->fbdev);
 262                 goto free_drm;
 263         }
 264
 265         drm_kms_helper_poll_init(drm);
 266
 267         platform_set_drvdata(pdev, priv);
 268
 269         ret = drm_dev_register(drm, 0);
 270         if (ret)
 271                 goto free_drm;
 272
 273         return 0;
 274
 275 free_drm:
 276         drm_dev_unref(drm);
 277
 278         return ret;
 279 }
 280
 281 static int meson_drv_bind(struct device *dev)
 282 {
 283         return meson_drv_bind_master(dev, true);
 284 }
 285
 286 static void meson_drv_unbind(struct device *dev)
 287 {
 288         struct drm_device *drm = dev_get_drvdata(dev);
 289         struct meson_drm *priv = drm->dev_private;
 290
 291         drm_dev_unregister(drm);
 292         drm_kms_helper_poll_fini(drm);
 293         drm_fbdev_cma_fini(priv->fbdev);
 294         drm_mode_config_cleanup(drm);
 295         drm_dev_unref(drm);
 296
 297 }
 298
 299 static const struct component_master_ops meson_drv_master_ops = {
 300         .bind   = meson_drv_bind,
 301         .unbind = meson_drv_unbind,
 302 };
 303
 304 static int compare_of(struct device *dev, void *data)
 305 {
 306         DRM_DEBUG_DRIVER("Comparing of node %s with %s\n",
 307                          of_node_full_name(dev->of_node),
 308                          of_node_full_name(data));
 309
 310         return dev->of_node == data;
 311 }
 312
 313 /* Possible connectors nodes to ignore */
 314 static const struct of_device_id connectors_match[] = {
 315         { .compatible = "composite-video-connector" },
 316         { .compatible = "svideo-connector" },
 317         { .compatible = "hdmi-connector" },
 318         { .compatible = "dvi-connector" },
 319         {}
 320 };
 321
 322 static int meson_probe_remote(struct platform_device *pdev,
 323                               struct component_match **match,
 324                               struct device_node *parent,
 325                               struct device_node *remote)
 326 {
 327         struct device_node *ep, *remote_node;
 328         int count = 1;
 329
 330         /* If node is a connector, return and do not add to match table */
 331         if (of_match_node(connectors_match, remote))
 332                 return 1;
 333
 334         component_match_add(&pdev->dev, match, compare_of, remote);
 335
 336         for_each_endpoint_of_node(remote, ep) {
 337                 remote_node = of_graph_get_remote_port_parent(ep);
 338                 if (!remote_node ||
 339                     remote_node == parent || /* Ignore parent endpoint */
 340                     !of_device_is_available(remote_node))
 341                         continue;
 342
 343                 count += meson_probe_remote(pdev, match, remote, remote_node);
 344
 345                 of_node_put(remote_node);
 346         }
 347
 348         return count;
 349 }
 350
 351 static int meson_drv_probe(struct platform_device *pdev)
 352 {
 353         struct component_match *match = NULL;
 354         struct device_node *np = pdev->dev.of_node;
 355         struct device_node *ep, *remote;
 356         int count = 0;
 357
 358         for_each_endpoint_of_node(np, ep) {
 359                 remote = of_graph_get_remote_port_parent(ep);
 360                 if (!remote || !of_device_is_available(remote))
 361                         continue;
 362
 363                 count += meson_probe_remote(pdev, &match, np, remote);
 364         }
 365
 366         if (count && !match)
 367                 return meson_drv_bind_master(&pdev->dev, false);
 368
 369         /* If some endpoints were found, initialize the nodes */
 370         if (count) {
 371                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 372
 373                 return component_master_add_with_match(&pdev->dev,
 374                                                        &meson_drv_master_ops,
 375                                                        match);
 376         }
 377
 378         /* If no output endpoints were available, simply bail out */
 379         return 0;
 380 };
 381
 382 static const struct of_device_id dt_match[] = {
 383         { .compatible = "amlogic,meson-gxbb-vpu" },
 384         { .compatible = "amlogic,meson-gxl-vpu" },
 385         { .compatible = "amlogic,meson-gxm-vpu" },
 386         {}
 387 };
 388 MODULE_DEVICE_TABLE(of, dt_match);
 389
 390 static struct platform_driver meson_drm_platform_driver = {
 391         .probe      = meson_drv_probe,
 392         .driver     = {
 393                 .name   = "meson-drm",
 394                 .of_match_table = dt_match,
 395         },
 396 };
 397
 398 module_platform_driver(meson_drm_platform_driver);
 399
 400 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
 401 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
 402 MODULE_DESCRIPTION(DRIVER_DESC);
 403 MODULE_LICENSE("GPL");