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