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