drivers/gpu/drm/sti/sti_drv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) STMicroelectronics SA 2014
   4  * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
   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_gem_framebuffer_helper.h>
  20 #include <drm/drm_fb_helper.h>
  21 #include <drm/drm_fb_cma_helper.h>
  22 #include <drm/drm_of.h>
  23
  24 #include "sti_crtc.h"
  25 #include "sti_drv.h"
  26 #include "sti_plane.h"
  27
  28 #define DRIVER_NAME     "sti"
  29 #define DRIVER_DESC     "STMicroelectronics SoC DRM"
  30 #define DRIVER_DATE     "20140601"
  31 #define DRIVER_MAJOR    1
  32 #define DRIVER_MINOR    0
  33
  34 #define STI_MAX_FB_HEIGHT       4096
  35 #define STI_MAX_FB_WIDTH        4096
  36
  37 static int sti_drm_fps_get(void *data, u64 *val)
  38 {
  39         struct drm_device *drm_dev = data;
  40         struct drm_plane *p;
  41         unsigned int i = 0;
  42
  43         *val = 0;
  44         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
  45                 struct sti_plane *plane = to_sti_plane(p);
  46
  47                 *val |= plane->fps_info.output << i;
  48                 i++;
  49         }
  50
  51         return 0;
  52 }
  53
  54 static int sti_drm_fps_set(void *data, u64 val)
  55 {
  56         struct drm_device *drm_dev = data;
  57         struct drm_plane *p;
  58         unsigned int i = 0;
  59
  60         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
  61                 struct sti_plane *plane = to_sti_plane(p);
  62
  63                 memset(&plane->fps_info, 0, sizeof(plane->fps_info));
  64                 plane->fps_info.output = (val >> i) & 1;
  65
  66                 i++;
  67         }
  68
  69         return 0;
  70 }
  71
  72 DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
  73                         sti_drm_fps_get, sti_drm_fps_set, "%llu\n");
  74
  75 static int sti_drm_fps_dbg_show(struct seq_file *s, void *data)
  76 {
  77         struct drm_info_node *node = s->private;
  78         struct drm_device *dev = node->minor->dev;
  79         struct drm_plane *p;
  80
  81         list_for_each_entry(p, &dev->mode_config.plane_list, head) {
  82                 struct sti_plane *plane = to_sti_plane(p);
  83
  84                 seq_printf(s, "%s%s\n",
  85                            plane->fps_info.fps_str,
  86                            plane->fps_info.fips_str);
  87         }
  88
  89         return 0;
  90 }
  91
  92 static struct drm_info_list sti_drm_dbg_list[] = {
  93         {"fps_get", sti_drm_fps_dbg_show, 0},
  94 };
  95
  96 static int sti_drm_dbg_init(struct drm_minor *minor)
  97 {
  98         struct dentry *dentry;
  99         int ret;
 100
 101         ret = drm_debugfs_create_files(sti_drm_dbg_list,
 102                                        ARRAY_SIZE(sti_drm_dbg_list),
 103                                        minor->debugfs_root, minor);
 104         if (ret)
 105                 goto err;
 106
 107         dentry = debugfs_create_file("fps_show", S_IRUGO | S_IWUSR,
 108                                      minor->debugfs_root, minor->dev,
 109                                      &sti_drm_fps_fops);
 110         if (!dentry) {
 111                 ret = -ENOMEM;
 112                 goto err;
 113         }
 114
 115         DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
 116         return 0;
 117 err:
 118         DRM_ERROR("%s: cannot install debugfs\n", DRIVER_NAME);
 119         return ret;
 120 }
 121
 122 static int sti_atomic_check(struct drm_device *dev,
 123                             struct drm_atomic_state *state)
 124 {
 125         int ret;
 126
 127         ret = drm_atomic_helper_check_modeset(dev, state);
 128         if (ret)
 129                 return ret;
 130
 131         ret = drm_atomic_normalize_zpos(dev, state);
 132         if (ret)
 133                 return ret;
 134
 135         ret = drm_atomic_helper_check_planes(dev, state);
 136         if (ret)
 137                 return ret;
 138
 139         return ret;
 140 }
 141
 142 static const struct drm_mode_config_funcs sti_mode_config_funcs = {
 143         .fb_create = drm_gem_fb_create,
 144         .output_poll_changed = drm_fb_helper_output_poll_changed,
 145         .atomic_check = sti_atomic_check,
 146         .atomic_commit = drm_atomic_helper_commit,
 147 };
 148
 149 static void sti_mode_config_init(struct drm_device *dev)
 150 {
 151         dev->mode_config.min_width = 0;
 152         dev->mode_config.min_height = 0;
 153
 154         /*
 155          * set max width and height as default value.
 156          * this value would be used to check framebuffer size limitation
 157          * at drm_mode_addfb().
 158          */
 159         dev->mode_config.max_width = STI_MAX_FB_WIDTH;
 160         dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
 161
 162         dev->mode_config.funcs = &sti_mode_config_funcs;
 163 }
 164
 165 DEFINE_DRM_GEM_CMA_FOPS(sti_driver_fops);
 166
 167 static struct drm_driver sti_driver = {
 168         .driver_features = DRIVER_MODESET |
 169             DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC,
 170         .gem_free_object_unlocked = drm_gem_cma_free_object,
 171         .gem_vm_ops = &drm_gem_cma_vm_ops,
 172         .dumb_create = drm_gem_cma_dumb_create,
 173         .fops = &sti_driver_fops,
 174
 175         .enable_vblank = sti_crtc_enable_vblank,
 176         .disable_vblank = sti_crtc_disable_vblank,
 177
 178         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 179         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 180         .gem_prime_export = drm_gem_prime_export,
 181         .gem_prime_import = drm_gem_prime_import,
 182         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 183         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 184         .gem_prime_vmap = drm_gem_cma_prime_vmap,
 185         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 186         .gem_prime_mmap = drm_gem_cma_prime_mmap,
 187
 188         .debugfs_init = sti_drm_dbg_init,
 189
 190         .name = DRIVER_NAME,
 191         .desc = DRIVER_DESC,
 192         .date = DRIVER_DATE,
 193         .major = DRIVER_MAJOR,
 194         .minor = DRIVER_MINOR,
 195 };
 196
 197 static int compare_of(struct device *dev, void *data)
 198 {
 199         return dev->of_node == data;
 200 }
 201
 202 static int sti_init(struct drm_device *ddev)
 203 {
 204         struct sti_private *private;
 205
 206         private = kzalloc(sizeof(*private), GFP_KERNEL);
 207         if (!private)
 208                 return -ENOMEM;
 209
 210         ddev->dev_private = (void *)private;
 211         dev_set_drvdata(ddev->dev, ddev);
 212         private->drm_dev = ddev;
 213
 214         drm_mode_config_init(ddev);
 215
 216         sti_mode_config_init(ddev);
 217
 218         drm_kms_helper_poll_init(ddev);
 219
 220         return 0;
 221 }
 222
 223 static void sti_cleanup(struct drm_device *ddev)
 224 {
 225         struct sti_private *private = ddev->dev_private;
 226
 227         drm_fb_cma_fbdev_fini(ddev);
 228         drm_kms_helper_poll_fini(ddev);
 229         component_unbind_all(ddev->dev, ddev);
 230         kfree(private);
 231         ddev->dev_private = NULL;
 232 }
 233
 234 static int sti_bind(struct device *dev)
 235 {
 236         struct drm_device *ddev;
 237         int ret;
 238
 239         ddev = drm_dev_alloc(&sti_driver, dev);
 240         if (IS_ERR(ddev))
 241                 return PTR_ERR(ddev);
 242
 243         ret = sti_init(ddev);
 244         if (ret)
 245                 goto err_drm_dev_unref;
 246
 247         ret = component_bind_all(ddev->dev, ddev);
 248         if (ret)
 249                 goto err_cleanup;
 250
 251         ret = drm_dev_register(ddev, 0);
 252         if (ret)
 253                 goto err_register;
 254
 255         drm_mode_config_reset(ddev);
 256
 257         if (ddev->mode_config.num_connector) {
 258                 ret = drm_fb_cma_fbdev_init(ddev, 32, 0);
 259                 if (ret)
 260                         DRM_DEBUG_DRIVER("Warning: fails to create fbdev\n");
 261         }
 262
 263         return 0;
 264
 265 err_register:
 266         drm_mode_config_cleanup(ddev);
 267 err_cleanup:
 268         sti_cleanup(ddev);
 269 err_drm_dev_unref:
 270         drm_dev_unref(ddev);
 271         return ret;
 272 }
 273
 274 static void sti_unbind(struct device *dev)
 275 {
 276         struct drm_device *ddev = dev_get_drvdata(dev);
 277
 278         drm_dev_unregister(ddev);
 279         sti_cleanup(ddev);
 280         drm_dev_unref(ddev);
 281 }
 282
 283 static const struct component_master_ops sti_ops = {
 284         .bind = sti_bind,
 285         .unbind = sti_unbind,
 286 };
 287
 288 static int sti_platform_probe(struct platform_device *pdev)
 289 {
 290         struct device *dev = &pdev->dev;
 291         struct device_node *node = dev->of_node;
 292         struct device_node *child_np;
 293         struct component_match *match = NULL;
 294
 295         dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 296
 297         devm_of_platform_populate(dev);
 298
 299         child_np = of_get_next_available_child(node, NULL);
 300
 301         while (child_np) {
 302                 drm_of_component_match_add(dev, &match, compare_of,
 303                                            child_np);
 304                 child_np = of_get_next_available_child(node, child_np);
 305         }
 306
 307         return component_master_add_with_match(dev, &sti_ops, match);
 308 }
 309
 310 static int sti_platform_remove(struct platform_device *pdev)
 311 {
 312         component_master_del(&pdev->dev, &sti_ops);
 313
 314         return 0;
 315 }
 316
 317 static const struct of_device_id sti_dt_ids[] = {
 318         { .compatible = "st,sti-display-subsystem", },
 319         { /* end node */ },
 320 };
 321 MODULE_DEVICE_TABLE(of, sti_dt_ids);
 322
 323 static struct platform_driver sti_platform_driver = {
 324         .probe = sti_platform_probe,
 325         .remove = sti_platform_remove,
 326         .driver = {
 327                 .name = DRIVER_NAME,
 328                 .of_match_table = sti_dt_ids,
 329         },
 330 };
 331
 332 static struct platform_driver * const drivers[] = {
 333         &sti_tvout_driver,
 334         &sti_hqvdp_driver,
 335         &sti_hdmi_driver,
 336         &sti_hda_driver,
 337         &sti_dvo_driver,
 338         &sti_vtg_driver,
 339         &sti_compositor_driver,
 340         &sti_platform_driver,
 341 };
 342
 343 static int sti_drm_init(void)
 344 {
 345         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 346 }
 347 module_init(sti_drm_init);
 348
 349 static void sti_drm_exit(void)
 350 {
 351         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 352 }
 353 module_exit(sti_drm_exit);
 354
 355 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 356 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 357 MODULE_LICENSE("GPL");