drivers/gpu/drm/meson/meson_drv.c

   1 /*
   2  * Copyright (C) 2016 BayLibre, SAS
   3  * Author: Neil Armstrong <[email protected]>
   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 <[email protected]>
  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/of_graph.h>
  28
  29 #include <drm/drmP.h>
  30 #include <drm/drm_atomic.h>
  31 #include <drm/drm_atomic_helper.h>
  32 #include <drm/drm_flip_work.h>
  33 #include <drm/drm_crtc_helper.h>
  34 #include <drm/drm_plane_helper.h>
  35 #include <drm/drm_gem_cma_helper.h>
  36 #include <drm/drm_fb_cma_helper.h>
  37 #include <drm/drm_rect.h>
  38 #include <drm/drm_fb_helper.h>
  39
  40 #include "meson_drv.h"
  41 #include "meson_plane.h"
  42 #include "meson_crtc.h"
  43 #include "meson_venc_cvbs.h"
  44
  45 #include "meson_vpp.h"
  46 #include "meson_viu.h"
  47 #include "meson_venc.h"
  48 #include "meson_canvas.h"
  49 #include "meson_registers.h"
  50
  51 #define DRIVER_NAME "meson"
  52 #define DRIVER_DESC "Amlogic Meson DRM driver"
  53
  54 /*
  55  * Video Processing Unit
  56  *
  57  * VPU Handles the Global Video Processing, it includes management of the
  58  * clocks gates, blocks reset lines and power domains.
  59  *
  60  * What is missing :
  61  * - Full reset of entire video processing HW blocks
  62  * - Scaling and setup of the VPU clock
  63  * - Bus clock gates
  64  * - Powering up video processing HW blocks
  65  * - Powering Up HDMI controller and PHY
  66  */
  67
  68 static void meson_fb_output_poll_changed(struct drm_device *dev)
  69 {
  70         struct meson_drm *priv = dev->dev_private;
  71
  72         drm_fbdev_cma_hotplug_event(priv->fbdev);
  73 }
  74
  75 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
  76         .output_poll_changed = meson_fb_output_poll_changed,
  77         .atomic_check        = drm_atomic_helper_check,
  78         .atomic_commit       = drm_atomic_helper_commit,
  79         .fb_create           = drm_fb_cma_create,
  80 };
  81
  82 static int meson_enable_vblank(struct drm_device *dev, unsigned int crtc)
  83 {
  84         struct meson_drm *priv = dev->dev_private;
  85
  86         meson_venc_enable_vsync(priv);
  87
  88         return 0;
  89 }
  90
  91 static void meson_disable_vblank(struct drm_device *dev, unsigned int crtc)
  92 {
  93         struct meson_drm *priv = dev->dev_private;
  94
  95         meson_venc_disable_vsync(priv);
  96 }
  97
  98 static irqreturn_t meson_irq(int irq, void *arg)
  99 {
 100         struct drm_device *dev = arg;
 101         struct meson_drm *priv = dev->dev_private;
 102
 103         (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
 104
 105         meson_crtc_irq(priv);
 106
 107         return IRQ_HANDLED;
 108 }
 109
 110 static const struct file_operations fops = {
 111         .owner          = THIS_MODULE,
 112         .open           = drm_open,
 113         .release        = drm_release,
 114         .unlocked_ioctl = drm_ioctl,
 115 #ifdef CONFIG_COMPAT
 116         .compat_ioctl   = drm_compat_ioctl,
 117 #endif
 118         .poll           = drm_poll,
 119         .read           = drm_read,
 120         .llseek         = no_llseek,
 121         .mmap           = drm_gem_cma_mmap,
 122 };
 123
 124 static struct drm_driver meson_driver = {
 125         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_GEM |
 126                                   DRIVER_MODESET | DRIVER_PRIME |
 127                                   DRIVER_ATOMIC,
 128
 129         /* Vblank */
 130         .enable_vblank          = meson_enable_vblank,
 131         .disable_vblank         = meson_disable_vblank,
 132         .get_vblank_counter     = drm_vblank_no_hw_counter,
 133
 134         /* IRQ */
 135         .irq_handler            = meson_irq,
 136
 137         /* PRIME Ops */
 138         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 139         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 140         .gem_prime_import       = drm_gem_prime_import,
 141         .gem_prime_export       = drm_gem_prime_export,
 142         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 143         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 144         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 145         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 146         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 147
 148         /* GEM Ops */
 149         .dumb_create            = drm_gem_cma_dumb_create,
 150         .dumb_destroy           = drm_gem_dumb_destroy,
 151         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 152         .gem_free_object_unlocked = drm_gem_cma_free_object,
 153         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 154
 155         /* Misc */
 156         .fops                   = &fops,
 157         .name                   = DRIVER_NAME,
 158         .desc                   = DRIVER_DESC,
 159         .date                   = "20161109",
 160         .major                  = 1,
 161         .minor                  = 0,
 162 };
 163
 164 static bool meson_vpu_has_available_connectors(struct device *dev)
 165 {
 166         struct device_node *ep, *remote;
 167
 168         /* Parses each endpoint and check if remote exists */
 169         for_each_endpoint_of_node(dev->of_node, ep) {
 170                 /* If the endpoint node exists, consider it enabled */
 171                 remote = of_graph_get_remote_port(ep);
 172                 if (remote)
 173                         return true;
 174         }
 175
 176         return false;
 177 }
 178
 179 static struct regmap_config meson_regmap_config = {
 180         .reg_bits       = 32,
 181         .val_bits       = 32,
 182         .reg_stride     = 4,
 183         .max_register   = 0x1000,
 184 };
 185
 186 static int meson_drv_probe(struct platform_device *pdev)
 187 {
 188         struct device *dev = &pdev->dev;
 189         struct meson_drm *priv;
 190         struct drm_device *drm;
 191         struct resource *res;
 192         void __iomem *regs;
 193         int ret;
 194
 195         /* Checks if an output connector is available */
 196         if (!meson_vpu_has_available_connectors(dev)) {
 197                 dev_err(dev, "No output connector available\n");
 198                 return -ENODEV;
 199         }
 200
 201         drm = drm_dev_alloc(&meson_driver, dev);
 202         if (IS_ERR(drm))
 203                 return PTR_ERR(drm);
 204
 205         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 206         if (!priv) {
 207                 ret = -ENOMEM;
 208                 goto free_drm;
 209         }
 210         drm->dev_private = priv;
 211         priv->drm = drm;
 212         priv->dev = dev;
 213
 214         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
 215         regs = devm_ioremap_resource(dev, res);
 216         if (IS_ERR(regs))
 217                 return PTR_ERR(regs);
 218
 219         priv->io_base = regs;
 220
 221         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
 222         /* Simply ioremap since it may be a shared register zone */
 223         regs = devm_ioremap(dev, res->start, resource_size(res));
 224         if (!regs)
 225                 return -EADDRNOTAVAIL;
 226
 227         priv->hhi = devm_regmap_init_mmio(dev, regs,
 228                                           &meson_regmap_config);
 229         if (IS_ERR(priv->hhi)) {
 230                 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
 231                 return PTR_ERR(priv->hhi);
 232         }
 233
 234         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
 235         /* Simply ioremap since it may be a shared register zone */
 236         regs = devm_ioremap(dev, res->start, resource_size(res));
 237         if (!regs)
 238                 return -EADDRNOTAVAIL;
 239
 240         priv->dmc = devm_regmap_init_mmio(dev, regs,
 241                                           &meson_regmap_config);
 242         if (IS_ERR(priv->dmc)) {
 243                 dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
 244                 return PTR_ERR(priv->dmc);
 245         }
 246
 247         priv->vsync_irq = platform_get_irq(pdev, 0);
 248
 249         drm_vblank_init(drm, 1);
 250         drm_mode_config_init(drm);
 251
 252         /* Encoder Initialization */
 253
 254         ret = meson_venc_cvbs_create(priv);
 255         if (ret)
 256                 goto free_drm;
 257
 258         /* Hardware Initialization */
 259
 260         meson_venc_init(priv);
 261         meson_vpp_init(priv);
 262         meson_viu_init(priv);
 263
 264         ret = meson_plane_create(priv);
 265         if (ret)
 266                 goto free_drm;
 267
 268         ret = meson_crtc_create(priv);
 269         if (ret)
 270                 goto free_drm;
 271
 272         ret = drm_irq_install(drm, priv->vsync_irq);
 273         if (ret)
 274                 goto free_drm;
 275
 276         drm_mode_config_reset(drm);
 277         drm->mode_config.max_width = 8192;
 278         drm->mode_config.max_height = 8192;
 279         drm->mode_config.funcs = &meson_mode_config_funcs;
 280
 281         priv->fbdev = drm_fbdev_cma_init(drm, 32,
 282                                          drm->mode_config.num_crtc,
 283                                          drm->mode_config.num_connector);
 284         if (IS_ERR(priv->fbdev)) {
 285                 ret = PTR_ERR(priv->fbdev);
 286                 goto free_drm;
 287         }
 288
 289         drm_kms_helper_poll_init(drm);
 290
 291         platform_set_drvdata(pdev, priv);
 292
 293         ret = drm_dev_register(drm, 0);
 294         if (ret)
 295                 goto free_drm;
 296
 297         return 0;
 298
 299 free_drm:
 300         drm_dev_unref(drm);
 301
 302         return ret;
 303 }
 304
 305 static int meson_drv_remove(struct platform_device *pdev)
 306 {
 307         struct drm_device *drm = dev_get_drvdata(&pdev->dev);
 308         struct meson_drm *priv = drm->dev_private;
 309
 310         drm_dev_unregister(drm);
 311         drm_kms_helper_poll_fini(drm);
 312         drm_fbdev_cma_fini(priv->fbdev);
 313         drm_mode_config_cleanup(drm);
 314         drm_vblank_cleanup(drm);
 315         drm_dev_unref(drm);
 316
 317         return 0;
 318 }
 319
 320 static const struct of_device_id dt_match[] = {
 321         { .compatible = "amlogic,meson-gxbb-vpu" },
 322         { .compatible = "amlogic,meson-gxl-vpu" },
 323         { .compatible = "amlogic,meson-gxm-vpu" },
 324         {}
 325 };
 326 MODULE_DEVICE_TABLE(of, dt_match);
 327
 328 static struct platform_driver meson_drm_platform_driver = {
 329         .probe      = meson_drv_probe,
 330         .remove     = meson_drv_remove,
 331         .driver     = {
 332                 .owner  = THIS_MODULE,
 333                 .name   = DRIVER_NAME,
 334                 .of_match_table = dt_match,
 335         },
 336 };
 337
 338 module_platform_driver(meson_drm_platform_driver);
 339
 340 MODULE_AUTHOR("Jasper St. Pierre <[email protected]>");
 341 MODULE_AUTHOR("Neil Armstrong <[email protected]>");
 342 MODULE_DESCRIPTION(DRIVER_DESC);
 343 MODULE_LICENSE("GPL");