drivers/gpu/drm/sti/sti_drv.c

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2014
   3  * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
   4  * License terms:  GNU General Public License (GPL), version 2
   5  */
   6
   7 #include <drm/drmP.h>
   8
   9 #include <linux/component.h>
  10 #include <linux/debugfs.h>
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/of_platform.h>
  14
  15 #include <drm/drm_atomic.h>
  16 #include <drm/drm_atomic_helper.h>
  17 #include <drm/drm_crtc_helper.h>
  18 #include <drm/drm_gem_cma_helper.h>
  19 #include <drm/drm_fb_cma_helper.h>
  20 #include <drm/drm_of.h>
  21
  22 #include "sti_crtc.h"
  23 #include "sti_drv.h"
  24 #include "sti_plane.h"
  25
  26 #define DRIVER_NAME     "sti"
  27 #define DRIVER_DESC     "STMicroelectronics SoC DRM"
  28 #define DRIVER_DATE     "20140601"
  29 #define DRIVER_MAJOR    1
  30 #define DRIVER_MINOR    0
  31
  32 #define STI_MAX_FB_HEIGHT       4096
  33 #define STI_MAX_FB_WIDTH        4096
  34
  35 static int sti_drm_fps_get(void *data, u64 *val)
  36 {
  37         struct drm_device *drm_dev = data;
  38         struct drm_plane *p;
  39         unsigned int i = 0;
  40
  41         *val = 0;
  42         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
  43                 struct sti_plane *plane = to_sti_plane(p);
  44
  45                 *val |= plane->fps_info.output << i;
  46                 i++;
  47         }
  48
  49         return 0;
  50 }
  51
  52 static int sti_drm_fps_set(void *data, u64 val)
  53 {
  54         struct drm_device *drm_dev = data;
  55         struct drm_plane *p;
  56         unsigned int i = 0;
  57
  58         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
  59                 struct sti_plane *plane = to_sti_plane(p);
  60
  61                 memset(&plane->fps_info, 0, sizeof(plane->fps_info));
  62                 plane->fps_info.output = (val >> i) & 1;
  63
  64                 i++;
  65         }
  66
  67         return 0;
  68 }
  69
  70 DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
  71                         sti_drm_fps_get, sti_drm_fps_set, "%llu\n");
  72
  73 static int sti_drm_fps_dbg_show(struct seq_file *s, void *data)
  74 {
  75         struct drm_info_node *node = s->private;
  76         struct drm_device *dev = node->minor->dev;
  77         struct drm_plane *p;
  78
  79         list_for_each_entry(p, &dev->mode_config.plane_list, head) {
  80                 struct sti_plane *plane = to_sti_plane(p);
  81
  82                 seq_printf(s, "%s%s\n",
  83                            plane->fps_info.fps_str,
  84                            plane->fps_info.fips_str);
  85         }
  86
  87         return 0;
  88 }
  89
  90 static struct drm_info_list sti_drm_dbg_list[] = {
  91         {"fps_get", sti_drm_fps_dbg_show, 0},
  92 };
  93
  94 static int sti_drm_dbg_init(struct drm_minor *minor)
  95 {
  96         struct dentry *dentry;
  97         int ret;
  98
  99         ret = drm_debugfs_create_files(sti_drm_dbg_list,
 100                                        ARRAY_SIZE(sti_drm_dbg_list),
 101                                        minor->debugfs_root, minor);
 102         if (ret)
 103                 goto err;
 104
 105         dentry = debugfs_create_file("fps_show", S_IRUGO | S_IWUSR,
 106                                      minor->debugfs_root, minor->dev,
 107                                      &sti_drm_fps_fops);
 108         if (!dentry) {
 109                 ret = -ENOMEM;
 110                 goto err;
 111         }
 112
 113         DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
 114         return 0;
 115 err:
 116         DRM_ERROR("%s: cannot install debugfs\n", DRIVER_NAME);
 117         return ret;
 118 }
 119
 120 static int sti_atomic_check(struct drm_device *dev,
 121                             struct drm_atomic_state *state)
 122 {
 123         int ret;
 124
 125         ret = drm_atomic_helper_check_modeset(dev, state);
 126         if (ret)
 127                 return ret;
 128
 129         ret = drm_atomic_normalize_zpos(dev, state);
 130         if (ret)
 131                 return ret;
 132
 133         ret = drm_atomic_helper_check_planes(dev, state);
 134         if (ret)
 135                 return ret;
 136
 137         return ret;
 138 }
 139
 140 static void sti_output_poll_changed(struct drm_device *ddev)
 141 {
 142         struct sti_private *private = ddev->dev_private;
 143
 144         drm_fbdev_cma_hotplug_event(private->fbdev);
 145 }
 146
 147 static const struct drm_mode_config_funcs sti_mode_config_funcs = {
 148         .fb_create = drm_fb_cma_create,
 149         .output_poll_changed = sti_output_poll_changed,
 150         .atomic_check = sti_atomic_check,
 151         .atomic_commit = drm_atomic_helper_commit,
 152 };
 153
 154 static void sti_mode_config_init(struct drm_device *dev)
 155 {
 156         dev->mode_config.min_width = 0;
 157         dev->mode_config.min_height = 0;
 158
 159         /*
 160          * set max width and height as default value.
 161          * this value would be used to check framebuffer size limitation
 162          * at drm_mode_addfb().
 163          */
 164         dev->mode_config.max_width = STI_MAX_FB_WIDTH;
 165         dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
 166
 167         dev->mode_config.funcs = &sti_mode_config_funcs;
 168 }
 169
 170 DEFINE_DRM_GEM_CMA_FOPS(sti_driver_fops);
 171
 172 static struct drm_driver sti_driver = {
 173         .driver_features = DRIVER_MODESET |
 174             DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC,
 175         .gem_free_object_unlocked = drm_gem_cma_free_object,
 176         .gem_vm_ops = &drm_gem_cma_vm_ops,
 177         .dumb_create = drm_gem_cma_dumb_create,
 178         .fops = &sti_driver_fops,
 179
 180         .enable_vblank = sti_crtc_enable_vblank,
 181         .disable_vblank = sti_crtc_disable_vblank,
 182
 183         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 184         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 185         .gem_prime_export = drm_gem_prime_export,
 186         .gem_prime_import = drm_gem_prime_import,
 187         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 188         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 189         .gem_prime_vmap = drm_gem_cma_prime_vmap,
 190         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 191         .gem_prime_mmap = drm_gem_cma_prime_mmap,
 192
 193         .debugfs_init = sti_drm_dbg_init,
 194
 195         .name = DRIVER_NAME,
 196         .desc = DRIVER_DESC,
 197         .date = DRIVER_DATE,
 198         .major = DRIVER_MAJOR,
 199         .minor = DRIVER_MINOR,
 200 };
 201
 202 static int compare_of(struct device *dev, void *data)
 203 {
 204         return dev->of_node == data;
 205 }
 206
 207 static int sti_init(struct drm_device *ddev)
 208 {
 209         struct sti_private *private;
 210
 211         private = kzalloc(sizeof(*private), GFP_KERNEL);
 212         if (!private)
 213                 return -ENOMEM;
 214
 215         ddev->dev_private = (void *)private;
 216         dev_set_drvdata(ddev->dev, ddev);
 217         private->drm_dev = ddev;
 218
 219         drm_mode_config_init(ddev);
 220
 221         sti_mode_config_init(ddev);
 222
 223         drm_kms_helper_poll_init(ddev);
 224
 225         return 0;
 226 }
 227
 228 static void sti_cleanup(struct drm_device *ddev)
 229 {
 230         struct sti_private *private = ddev->dev_private;
 231
 232         if (private->fbdev) {
 233                 drm_fbdev_cma_fini(private->fbdev);
 234                 private->fbdev = NULL;
 235         }
 236
 237         drm_kms_helper_poll_fini(ddev);
 238         component_unbind_all(ddev->dev, ddev);
 239         kfree(private);
 240         ddev->dev_private = NULL;
 241 }
 242
 243 static int sti_bind(struct device *dev)
 244 {
 245         struct drm_device *ddev;
 246         struct sti_private *private;
 247         struct drm_fbdev_cma *fbdev;
 248         int ret;
 249
 250         ddev = drm_dev_alloc(&sti_driver, dev);
 251         if (IS_ERR(ddev))
 252                 return PTR_ERR(ddev);
 253
 254         ret = sti_init(ddev);
 255         if (ret)
 256                 goto err_drm_dev_unref;
 257
 258         ret = component_bind_all(ddev->dev, ddev);
 259         if (ret)
 260                 goto err_cleanup;
 261
 262         ret = drm_dev_register(ddev, 0);
 263         if (ret)
 264                 goto err_register;
 265
 266         drm_mode_config_reset(ddev);
 267
 268         private = ddev->dev_private;
 269         if (ddev->mode_config.num_connector) {
 270                 fbdev = drm_fbdev_cma_init(ddev, 32,
 271                                            ddev->mode_config.num_connector);
 272                 if (IS_ERR(fbdev)) {
 273                         DRM_DEBUG_DRIVER("Warning: fails to create fbdev\n");
 274                         fbdev = NULL;
 275                 }
 276                 private->fbdev = fbdev;
 277         }
 278
 279         return 0;
 280
 281 err_register:
 282         drm_mode_config_cleanup(ddev);
 283 err_cleanup:
 284         sti_cleanup(ddev);
 285 err_drm_dev_unref:
 286         drm_dev_unref(ddev);
 287         return ret;
 288 }
 289
 290 static void sti_unbind(struct device *dev)
 291 {
 292         struct drm_device *ddev = dev_get_drvdata(dev);
 293
 294         drm_dev_unregister(ddev);
 295         sti_cleanup(ddev);
 296         drm_dev_unref(ddev);
 297 }
 298
 299 static const struct component_master_ops sti_ops = {
 300         .bind = sti_bind,
 301         .unbind = sti_unbind,
 302 };
 303
 304 static int sti_platform_probe(struct platform_device *pdev)
 305 {
 306         struct device *dev = &pdev->dev;
 307         struct device_node *node = dev->of_node;
 308         struct device_node *child_np;
 309         struct component_match *match = NULL;
 310
 311         dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 312
 313         devm_of_platform_populate(dev);
 314
 315         child_np = of_get_next_available_child(node, NULL);
 316
 317         while (child_np) {
 318                 drm_of_component_match_add(dev, &match, compare_of,
 319                                            child_np);
 320                 child_np = of_get_next_available_child(node, child_np);
 321         }
 322
 323         return component_master_add_with_match(dev, &sti_ops, match);
 324 }
 325
 326 static int sti_platform_remove(struct platform_device *pdev)
 327 {
 328         component_master_del(&pdev->dev, &sti_ops);
 329
 330         return 0;
 331 }
 332
 333 static const struct of_device_id sti_dt_ids[] = {
 334         { .compatible = "st,sti-display-subsystem", },
 335         { /* end node */ },
 336 };
 337 MODULE_DEVICE_TABLE(of, sti_dt_ids);
 338
 339 static struct platform_driver sti_platform_driver = {
 340         .probe = sti_platform_probe,
 341         .remove = sti_platform_remove,
 342         .driver = {
 343                 .name = DRIVER_NAME,
 344                 .of_match_table = sti_dt_ids,
 345         },
 346 };
 347
 348 static struct platform_driver * const drivers[] = {
 349         &sti_tvout_driver,
 350         &sti_hqvdp_driver,
 351         &sti_hdmi_driver,
 352         &sti_hda_driver,
 353         &sti_dvo_driver,
 354         &sti_vtg_driver,
 355         &sti_compositor_driver,
 356         &sti_platform_driver,
 357 };
 358
 359 static int sti_drm_init(void)
 360 {
 361         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 362 }
 363 module_init(sti_drm_init);
 364
 365 static void sti_drm_exit(void)
 366 {
 367         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 368 }
 369 module_exit(sti_drm_exit);
 370
 371 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 372 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 373 MODULE_LICENSE("GPL");