drivers/gpu/drm/meson/meson_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2016 BayLibre, SAS
   4  * Author: Neil Armstrong <narmstrong@baylibre.com>
   5  * Copyright (C) 2014 Endless Mobile
   6  *
   7  * Written by:
   8  *     Jasper St. Pierre <jstpierre@mecheye.net>
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/mutex.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/component.h>
  16 #include <linux/of_graph.h>
  17
  18 #include <drm/drmP.h>
  19 #include <drm/drm_atomic.h>
  20 #include <drm/drm_atomic_helper.h>
  21 #include <drm/drm_fb_cma_helper.h>
  22 #include <drm/drm_fb_helper.h>
  23 #include <drm/drm_flip_work.h>
  24 #include <drm/drm_gem_cma_helper.h>
  25 #include <drm/drm_gem_framebuffer_helper.h>
  26 #include <drm/drm_plane_helper.h>
  27 #include <drm/drm_probe_helper.h>
  28 #include <drm/drm_rect.h>
  29
  30 #include "meson_drv.h"
  31 #include "meson_plane.h"
  32 #include "meson_overlay.h"
  33 #include "meson_crtc.h"
  34 #include "meson_venc_cvbs.h"
  35
  36 #include "meson_vpp.h"
  37 #include "meson_viu.h"
  38 #include "meson_venc.h"
  39 #include "meson_registers.h"
  40
  41 #define DRIVER_NAME "meson"
  42 #define DRIVER_DESC "Amlogic Meson DRM driver"
  43
  44 /**
  45  * DOC: Video Processing Unit
  46  *
  47  * VPU Handles the Global Video Processing, it includes management of the
  48  * clocks gates, blocks reset lines and power domains.
  49  *
  50  * What is missing :
  51  *
  52  * - Full reset of entire video processing HW blocks
  53  * - Scaling and setup of the VPU clock
  54  * - Bus clock gates
  55  * - Powering up video processing HW blocks
  56  * - Powering Up HDMI controller and PHY
  57  */
  58
  59 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
  60         .atomic_check        = drm_atomic_helper_check,
  61         .atomic_commit       = drm_atomic_helper_commit,
  62         .fb_create           = drm_gem_fb_create,
  63 };
  64
  65 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
  66         .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
  67 };
  68
  69 static irqreturn_t meson_irq(int irq, void *arg)
  70 {
  71         struct drm_device *dev = arg;
  72         struct meson_drm *priv = dev->dev_private;
  73
  74         (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
  75
  76         meson_crtc_irq(priv);
  77
  78         return IRQ_HANDLED;
  79 }
  80
  81 static int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
  82                              struct drm_mode_create_dumb *args)
  83 {
  84         /*
  85          * We need 64bytes aligned stride, and PAGE aligned size
  86          */
  87         args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
  88         args->size = PAGE_ALIGN(args->pitch * args->height);
  89
  90         return drm_gem_cma_dumb_create_internal(file, dev, args);
  91 }
  92
  93 DEFINE_DRM_GEM_CMA_FOPS(fops);
  94
  95 static struct drm_driver meson_driver = {
  96         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
  97
  98         /* IRQ */
  99         .irq_handler            = meson_irq,
 100
 101         /* PRIME Ops */
 102         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 103         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 104         .gem_prime_import       = drm_gem_prime_import,
 105         .gem_prime_export       = drm_gem_prime_export,
 106         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 107         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 108         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 109         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 110         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 111
 112         /* GEM Ops */
 113         .dumb_create            = meson_dumb_create,
 114         .gem_free_object_unlocked = drm_gem_cma_free_object,
 115         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 116
 117         /* Misc */
 118         .fops                   = &fops,
 119         .name                   = DRIVER_NAME,
 120         .desc                   = DRIVER_DESC,
 121         .date                   = "20161109",
 122         .major                  = 1,
 123         .minor                  = 0,
 124 };
 125
 126 static bool meson_vpu_has_available_connectors(struct device *dev)
 127 {
 128         struct device_node *ep, *remote;
 129
 130         /* Parses each endpoint and check if remote exists */
 131         for_each_endpoint_of_node(dev->of_node, ep) {
 132                 /* If the endpoint node exists, consider it enabled */
 133                 remote = of_graph_get_remote_port(ep);
 134                 if (remote)
 135                         return true;
 136         }
 137
 138         return false;
 139 }
 140
 141 static struct regmap_config meson_regmap_config = {
 142         .reg_bits       = 32,
 143         .val_bits       = 32,
 144         .reg_stride     = 4,
 145         .max_register   = 0x1000,
 146 };
 147
 148 static void meson_vpu_init(struct meson_drm *priv)
 149 {
 150         writel_relaxed(0x210000, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
 151         writel_relaxed(0x10000, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
 152         writel_relaxed(0x900000, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
 153         writel_relaxed(0x20000, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
 154 }
 155
 156 static void meson_remove_framebuffers(void)
 157 {
 158         struct apertures_struct *ap;
 159
 160         ap = alloc_apertures(1);
 161         if (!ap)
 162                 return;
 163
 164         /* The framebuffer can be located anywhere in RAM */
 165         ap->ranges[0].base = 0;
 166         ap->ranges[0].size = ~0;
 167
 168         drm_fb_helper_remove_conflicting_framebuffers(ap, "meson-drm-fb",
 169                                                       false);
 170         kfree(ap);
 171 }
 172
 173 static int meson_drv_bind_master(struct device *dev, bool has_components)
 174 {
 175         struct platform_device *pdev = to_platform_device(dev);
 176         struct meson_drm *priv;
 177         struct drm_device *drm;
 178         struct resource *res;
 179         void __iomem *regs;
 180         int ret;
 181
 182         /* Checks if an output connector is available */
 183         if (!meson_vpu_has_available_connectors(dev)) {
 184                 dev_err(dev, "No output connector available\n");
 185                 return -ENODEV;
 186         }
 187
 188         drm = drm_dev_alloc(&meson_driver, dev);
 189         if (IS_ERR(drm))
 190                 return PTR_ERR(drm);
 191
 192         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 193         if (!priv) {
 194                 ret = -ENOMEM;
 195                 goto free_drm;
 196         }
 197         drm->dev_private = priv;
 198         priv->drm = drm;
 199         priv->dev = dev;
 200
 201         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
 202         regs = devm_ioremap_resource(dev, res);
 203         if (IS_ERR(regs)) {
 204                 ret = PTR_ERR(regs);
 205                 goto free_drm;
 206         }
 207
 208         priv->io_base = regs;
 209
 210         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 211         if (!res) {
 212                 ret = -EINVAL;
 213                 goto free_drm;
 214         }
 215         /* Simply ioremap since it may be a shared register zone */
 216         regs = devm_ioremap(dev, res->start, resource_size(res));
 217         if (!regs) {
 218                 ret = -EADDRNOTAVAIL;
 219                 goto free_drm;
 220         }
 221
 222         priv->hhi = devm_regmap_init_mmio(dev, regs,
 223                                           &meson_regmap_config);
 224         if (IS_ERR(priv->hhi)) {
 225                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 226                 ret = PTR_ERR(priv->hhi);
 227                 goto free_drm;
 228         }
 229
 230         priv->canvas = meson_canvas_get(dev);
 231         if (IS_ERR(priv->canvas)) {
 232                 ret = PTR_ERR(priv->canvas);
 233                 goto free_drm;
 234         }
 235
 236         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
 237         if (ret)
 238                 goto free_drm;
 239         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
 240         if (ret) {
 241                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 242                 goto free_drm;
 243         }
 244         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
 245         if (ret) {
 246                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 247                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 248                 goto free_drm;
 249         }
 250         ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
 251         if (ret) {
 252                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 253                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 254                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 255                 goto free_drm;
 256         }
 257
 258         priv->vsync_irq = platform_get_irq(pdev, 0);
 259
 260         ret = drm_vblank_init(drm, 1);
 261         if (ret)
 262                 goto free_drm;
 263
 264         /* Remove early framebuffers (ie. simplefb) */
 265         meson_remove_framebuffers();
 266
 267         drm_mode_config_init(drm);
 268         drm->mode_config.max_width = 3840;
 269         drm->mode_config.max_height = 2160;
 270         drm->mode_config.funcs = &meson_mode_config_funcs;
 271         drm->mode_config.helper_private = &meson_mode_config_helpers;
 272
 273         /* Hardware Initialization */
 274
 275         meson_vpu_init(priv);
 276         meson_venc_init(priv);
 277         meson_vpp_init(priv);
 278         meson_viu_init(priv);
 279
 280         /* Encoder Initialization */
 281
 282         ret = meson_venc_cvbs_create(priv);
 283         if (ret)
 284                 goto free_drm;
 285
 286         if (has_components) {
 287                 ret = component_bind_all(drm->dev, drm);
 288                 if (ret) {
 289                         dev_err(drm->dev, "Couldn't bind all components\n");
 290                         goto free_drm;
 291                 }
 292         }
 293
 294         ret = meson_plane_create(priv);
 295         if (ret)
 296                 goto free_drm;
 297
 298         ret = meson_overlay_create(priv);
 299         if (ret)
 300                 goto free_drm;
 301
 302         ret = meson_crtc_create(priv);
 303         if (ret)
 304                 goto free_drm;
 305
 306         ret = drm_irq_install(drm, priv->vsync_irq);
 307         if (ret)
 308                 goto free_drm;
 309
 310         drm_mode_config_reset(drm);
 311
 312         drm_kms_helper_poll_init(drm);
 313
 314         platform_set_drvdata(pdev, priv);
 315
 316         ret = drm_dev_register(drm, 0);
 317         if (ret)
 318                 goto uninstall_irq;
 319
 320         drm_fbdev_generic_setup(drm, 32);
 321
 322         return 0;
 323
 324 uninstall_irq:
 325         drm_irq_uninstall(drm);
 326 free_drm:
 327         drm_dev_put(drm);
 328
 329         return ret;
 330 }
 331
 332 static int meson_drv_bind(struct device *dev)
 333 {
 334         return meson_drv_bind_master(dev, true);
 335 }
 336
 337 static void meson_drv_unbind(struct device *dev)
 338 {
 339         struct meson_drm *priv = dev_get_drvdata(dev);
 340         struct drm_device *drm = priv->drm;
 341
 342         if (priv->canvas) {
 343                 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
 344                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
 345                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
 346                 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
 347         }
 348
 349         drm_dev_unregister(drm);
 350         drm_irq_uninstall(drm);
 351         drm_kms_helper_poll_fini(drm);
 352         drm_mode_config_cleanup(drm);
 353         drm_dev_put(drm);
 354
 355 }
 356
 357 static const struct component_master_ops meson_drv_master_ops = {
 358         .bind   = meson_drv_bind,
 359         .unbind = meson_drv_unbind,
 360 };
 361
 362 static int compare_of(struct device *dev, void *data)
 363 {
 364         DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
 365                          dev->of_node, data);
 366
 367         return dev->of_node == data;
 368 }
 369
 370 /* Possible connectors nodes to ignore */
 371 static const struct of_device_id connectors_match[] = {
 372         { .compatible = "composite-video-connector" },
 373         { .compatible = "svideo-connector" },
 374         { .compatible = "hdmi-connector" },
 375         { .compatible = "dvi-connector" },
 376         {}
 377 };
 378
 379 static int meson_probe_remote(struct platform_device *pdev,
 380                               struct component_match **match,
 381                               struct device_node *parent,
 382                               struct device_node *remote)
 383 {
 384         struct device_node *ep, *remote_node;
 385         int count = 1;
 386
 387         /* If node is a connector, return and do not add to match table */
 388         if (of_match_node(connectors_match, remote))
 389                 return 1;
 390
 391         component_match_add(&pdev->dev, match, compare_of, remote);
 392
 393         for_each_endpoint_of_node(remote, ep) {
 394                 remote_node = of_graph_get_remote_port_parent(ep);
 395                 if (!remote_node ||
 396                     remote_node == parent || /* Ignore parent endpoint */
 397                     !of_device_is_available(remote_node)) {
 398                         of_node_put(remote_node);
 399                         continue;
 400                 }
 401
 402                 count += meson_probe_remote(pdev, match, remote, remote_node);
 403
 404                 of_node_put(remote_node);
 405         }
 406
 407         return count;
 408 }
 409
 410 static int meson_drv_probe(struct platform_device *pdev)
 411 {
 412         struct component_match *match = NULL;
 413         struct device_node *np = pdev->dev.of_node;
 414         struct device_node *ep, *remote;
 415         int count = 0;
 416
 417         for_each_endpoint_of_node(np, ep) {
 418                 remote = of_graph_get_remote_port_parent(ep);
 419                 if (!remote || !of_device_is_available(remote)) {
 420                         of_node_put(remote);
 421                         continue;
 422                 }
 423
 424                 count += meson_probe_remote(pdev, &match, np, remote);
 425                 of_node_put(remote);
 426         }
 427
 428         if (count && !match)
 429                 return meson_drv_bind_master(&pdev->dev, false);
 430
 431         /* If some endpoints were found, initialize the nodes */
 432         if (count) {
 433                 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
 434
 435                 return component_master_add_with_match(&pdev->dev,
 436                                                        &meson_drv_master_ops,
 437                                                        match);
 438         }
 439
 440         /* If no output endpoints were available, simply bail out */
 441         return 0;
 442 };
 443
 444 static const struct of_device_id dt_match[] = {
 445         { .compatible = "amlogic,meson-gxbb-vpu" },
 446         { .compatible = "amlogic,meson-gxl-vpu" },
 447         { .compatible = "amlogic,meson-gxm-vpu" },
 448         { .compatible = "amlogic,meson-g12a-vpu" },
 449         {}
 450 };
 451 MODULE_DEVICE_TABLE(of, dt_match);
 452
 453 static struct platform_driver meson_drm_platform_driver = {
 454         .probe      = meson_drv_probe,
 455         .driver     = {
 456                 .name   = "meson-drm",
 457                 .of_match_table = dt_match,
 458         },
 459 };
 460
 461 module_platform_driver(meson_drm_platform_driver);
 462
 463 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
 464 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
 465 MODULE_DESCRIPTION(DRIVER_DESC);
 466 MODULE_LICENSE("GPL");