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