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 const struct drm_mode_config_funcs sti_mode_config_funcs = {
 123         .fb_create = drm_gem_fb_create,
 124         .output_poll_changed = drm_fb_helper_output_poll_changed,
 125         .atomic_check = drm_atomic_helper_check,
 126         .atomic_commit = drm_atomic_helper_commit,
 127 };
 128
 129 static void sti_mode_config_init(struct drm_device *dev)
 130 {
 131         dev->mode_config.min_width = 0;
 132         dev->mode_config.min_height = 0;
 133
 134         /*
 135          * set max width and height as default value.
 136          * this value would be used to check framebuffer size limitation
 137          * at drm_mode_addfb().
 138          */
 139         dev->mode_config.max_width = STI_MAX_FB_WIDTH;
 140         dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
 141
 142         dev->mode_config.funcs = &sti_mode_config_funcs;
 143
 144         dev->mode_config.normalize_zpos = true;
 145 }
 146
 147 DEFINE_DRM_GEM_CMA_FOPS(sti_driver_fops);
 148
 149 static struct drm_driver sti_driver = {
 150         .driver_features = DRIVER_MODESET |
 151             DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC,
 152         .gem_free_object_unlocked = drm_gem_cma_free_object,
 153         .gem_vm_ops = &drm_gem_cma_vm_ops,
 154         .dumb_create = drm_gem_cma_dumb_create,
 155         .fops = &sti_driver_fops,
 156
 157         .enable_vblank = sti_crtc_enable_vblank,
 158         .disable_vblank = sti_crtc_disable_vblank,
 159
 160         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 161         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 162         .gem_prime_export = drm_gem_prime_export,
 163         .gem_prime_import = drm_gem_prime_import,
 164         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 165         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 166         .gem_prime_vmap = drm_gem_cma_prime_vmap,
 167         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 168         .gem_prime_mmap = drm_gem_cma_prime_mmap,
 169
 170         .debugfs_init = sti_drm_dbg_init,
 171
 172         .name = DRIVER_NAME,
 173         .desc = DRIVER_DESC,
 174         .date = DRIVER_DATE,
 175         .major = DRIVER_MAJOR,
 176         .minor = DRIVER_MINOR,
 177 };
 178
 179 static int compare_of(struct device *dev, void *data)
 180 {
 181         return dev->of_node == data;
 182 }
 183
 184 static int sti_init(struct drm_device *ddev)
 185 {
 186         struct sti_private *private;
 187
 188         private = kzalloc(sizeof(*private), GFP_KERNEL);
 189         if (!private)
 190                 return -ENOMEM;
 191
 192         ddev->dev_private = (void *)private;
 193         dev_set_drvdata(ddev->dev, ddev);
 194         private->drm_dev = ddev;
 195
 196         drm_mode_config_init(ddev);
 197
 198         sti_mode_config_init(ddev);
 199
 200         drm_kms_helper_poll_init(ddev);
 201
 202         return 0;
 203 }
 204
 205 static void sti_cleanup(struct drm_device *ddev)
 206 {
 207         struct sti_private *private = ddev->dev_private;
 208
 209         drm_fb_cma_fbdev_fini(ddev);
 210         drm_kms_helper_poll_fini(ddev);
 211         component_unbind_all(ddev->dev, ddev);
 212         kfree(private);
 213         ddev->dev_private = NULL;
 214 }
 215
 216 static int sti_bind(struct device *dev)
 217 {
 218         struct drm_device *ddev;
 219         int ret;
 220
 221         ddev = drm_dev_alloc(&sti_driver, dev);
 222         if (IS_ERR(ddev))
 223                 return PTR_ERR(ddev);
 224
 225         ret = sti_init(ddev);
 226         if (ret)
 227                 goto err_drm_dev_put;
 228
 229         ret = component_bind_all(ddev->dev, ddev);
 230         if (ret)
 231                 goto err_cleanup;
 232
 233         ret = drm_dev_register(ddev, 0);
 234         if (ret)
 235                 goto err_register;
 236
 237         drm_mode_config_reset(ddev);
 238
 239         if (ddev->mode_config.num_connector) {
 240                 ret = drm_fb_cma_fbdev_init(ddev, 32, 0);
 241                 if (ret)
 242                         DRM_DEBUG_DRIVER("Warning: fails to create fbdev\n");
 243         }
 244
 245         return 0;
 246
 247 err_register:
 248         drm_mode_config_cleanup(ddev);
 249 err_cleanup:
 250         sti_cleanup(ddev);
 251 err_drm_dev_put:
 252         drm_dev_put(ddev);
 253         return ret;
 254 }
 255
 256 static void sti_unbind(struct device *dev)
 257 {
 258         struct drm_device *ddev = dev_get_drvdata(dev);
 259
 260         drm_dev_unregister(ddev);
 261         sti_cleanup(ddev);
 262         drm_dev_put(ddev);
 263 }
 264
 265 static const struct component_master_ops sti_ops = {
 266         .bind = sti_bind,
 267         .unbind = sti_unbind,
 268 };
 269
 270 static int sti_platform_probe(struct platform_device *pdev)
 271 {
 272         struct device *dev = &pdev->dev;
 273         struct device_node *node = dev->of_node;
 274         struct device_node *child_np;
 275         struct component_match *match = NULL;
 276
 277         dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 278
 279         devm_of_platform_populate(dev);
 280
 281         child_np = of_get_next_available_child(node, NULL);
 282
 283         while (child_np) {
 284                 drm_of_component_match_add(dev, &match, compare_of,
 285                                            child_np);
 286                 child_np = of_get_next_available_child(node, child_np);
 287         }
 288
 289         return component_master_add_with_match(dev, &sti_ops, match);
 290 }
 291
 292 static int sti_platform_remove(struct platform_device *pdev)
 293 {
 294         component_master_del(&pdev->dev, &sti_ops);
 295
 296         return 0;
 297 }
 298
 299 static const struct of_device_id sti_dt_ids[] = {
 300         { .compatible = "st,sti-display-subsystem", },
 301         { /* end node */ },
 302 };
 303 MODULE_DEVICE_TABLE(of, sti_dt_ids);
 304
 305 static struct platform_driver sti_platform_driver = {
 306         .probe = sti_platform_probe,
 307         .remove = sti_platform_remove,
 308         .driver = {
 309                 .name = DRIVER_NAME,
 310                 .of_match_table = sti_dt_ids,
 311         },
 312 };
 313
 314 static struct platform_driver * const drivers[] = {
 315         &sti_tvout_driver,
 316         &sti_hqvdp_driver,
 317         &sti_hdmi_driver,
 318         &sti_hda_driver,
 319         &sti_dvo_driver,
 320         &sti_vtg_driver,
 321         &sti_compositor_driver,
 322         &sti_platform_driver,
 323 };
 324
 325 static int sti_drm_init(void)
 326 {
 327         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 328 }
 329 module_init(sti_drm_init);
 330
 331 static void sti_drm_exit(void)
 332 {
 333         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 334 }
 335 module_exit(sti_drm_exit);
 336
 337 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 338 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 339 MODULE_LICENSE("GPL");