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 <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_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         int ret;
  99
 100         ret = drm_debugfs_create_files(sti_drm_dbg_list,
 101                                        ARRAY_SIZE(sti_drm_dbg_list),
 102                                        minor->debugfs_root, minor);
 103         if (ret)
 104                 goto err;
 105
 106         debugfs_create_file("fps_show", S_IRUGO | S_IWUSR, minor->debugfs_root,
 107                             minor->dev, &sti_drm_fps_fops);
 108
 109         DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
 110         return 0;
 111 err:
 112         DRM_ERROR("%s: cannot install debugfs\n", DRIVER_NAME);
 113         return ret;
 114 }
 115
 116 static const struct drm_mode_config_funcs sti_mode_config_funcs = {
 117         .fb_create = drm_gem_fb_create,
 118         .atomic_check = drm_atomic_helper_check,
 119         .atomic_commit = drm_atomic_helper_commit,
 120 };
 121
 122 static void sti_mode_config_init(struct drm_device *dev)
 123 {
 124         dev->mode_config.min_width = 0;
 125         dev->mode_config.min_height = 0;
 126
 127         /*
 128          * set max width and height as default value.
 129          * this value would be used to check framebuffer size limitation
 130          * at drm_mode_addfb().
 131          */
 132         dev->mode_config.max_width = STI_MAX_FB_WIDTH;
 133         dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
 134
 135         dev->mode_config.funcs = &sti_mode_config_funcs;
 136
 137         dev->mode_config.normalize_zpos = true;
 138 }
 139
 140 DEFINE_DRM_GEM_CMA_FOPS(sti_driver_fops);
 141
 142 static struct drm_driver sti_driver = {
 143         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
 144         .gem_free_object_unlocked = drm_gem_cma_free_object,
 145         .gem_vm_ops = &drm_gem_cma_vm_ops,
 146         .dumb_create = drm_gem_cma_dumb_create,
 147         .fops = &sti_driver_fops,
 148
 149         .enable_vblank = sti_crtc_enable_vblank,
 150         .disable_vblank = sti_crtc_disable_vblank,
 151
 152         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 153         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 154         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 155         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 156         .gem_prime_vmap = drm_gem_cma_prime_vmap,
 157         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 158         .gem_prime_mmap = drm_gem_cma_prime_mmap,
 159
 160         .debugfs_init = sti_drm_dbg_init,
 161
 162         .name = DRIVER_NAME,
 163         .desc = DRIVER_DESC,
 164         .date = DRIVER_DATE,
 165         .major = DRIVER_MAJOR,
 166         .minor = DRIVER_MINOR,
 167 };
 168
 169 static int compare_of(struct device *dev, void *data)
 170 {
 171         return dev->of_node == data;
 172 }
 173
 174 static int sti_init(struct drm_device *ddev)
 175 {
 176         struct sti_private *private;
 177
 178         private = kzalloc(sizeof(*private), GFP_KERNEL);
 179         if (!private)
 180                 return -ENOMEM;
 181
 182         ddev->dev_private = (void *)private;
 183         dev_set_drvdata(ddev->dev, ddev);
 184         private->drm_dev = ddev;
 185
 186         drm_mode_config_init(ddev);
 187
 188         sti_mode_config_init(ddev);
 189
 190         drm_kms_helper_poll_init(ddev);
 191
 192         return 0;
 193 }
 194
 195 static void sti_cleanup(struct drm_device *ddev)
 196 {
 197         struct sti_private *private = ddev->dev_private;
 198
 199         drm_kms_helper_poll_fini(ddev);
 200         drm_atomic_helper_shutdown(ddev);
 201         drm_mode_config_cleanup(ddev);
 202         component_unbind_all(ddev->dev, ddev);
 203         kfree(private);
 204         ddev->dev_private = NULL;
 205 }
 206
 207 static int sti_bind(struct device *dev)
 208 {
 209         struct drm_device *ddev;
 210         int ret;
 211
 212         ddev = drm_dev_alloc(&sti_driver, dev);
 213         if (IS_ERR(ddev))
 214                 return PTR_ERR(ddev);
 215
 216         ret = sti_init(ddev);
 217         if (ret)
 218                 goto err_drm_dev_put;
 219
 220         ret = component_bind_all(ddev->dev, ddev);
 221         if (ret)
 222                 goto err_cleanup;
 223
 224         ret = drm_dev_register(ddev, 0);
 225         if (ret)
 226                 goto err_cleanup;
 227
 228         drm_mode_config_reset(ddev);
 229
 230         drm_fbdev_generic_setup(ddev, 32);
 231
 232         return 0;
 233
 234 err_cleanup:
 235         sti_cleanup(ddev);
 236 err_drm_dev_put:
 237         drm_dev_put(ddev);
 238         return ret;
 239 }
 240
 241 static void sti_unbind(struct device *dev)
 242 {
 243         struct drm_device *ddev = dev_get_drvdata(dev);
 244
 245         drm_dev_unregister(ddev);
 246         sti_cleanup(ddev);
 247         drm_dev_put(ddev);
 248 }
 249
 250 static const struct component_master_ops sti_ops = {
 251         .bind = sti_bind,
 252         .unbind = sti_unbind,
 253 };
 254
 255 static int sti_platform_probe(struct platform_device *pdev)
 256 {
 257         struct device *dev = &pdev->dev;
 258         struct device_node *node = dev->of_node;
 259         struct device_node *child_np;
 260         struct component_match *match = NULL;
 261
 262         dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 263
 264         devm_of_platform_populate(dev);
 265
 266         child_np = of_get_next_available_child(node, NULL);
 267
 268         while (child_np) {
 269                 drm_of_component_match_add(dev, &match, compare_of,
 270                                            child_np);
 271                 child_np = of_get_next_available_child(node, child_np);
 272         }
 273
 274         return component_master_add_with_match(dev, &sti_ops, match);
 275 }
 276
 277 static int sti_platform_remove(struct platform_device *pdev)
 278 {
 279         component_master_del(&pdev->dev, &sti_ops);
 280
 281         return 0;
 282 }
 283
 284 static const struct of_device_id sti_dt_ids[] = {
 285         { .compatible = "st,sti-display-subsystem", },
 286         { /* end node */ },
 287 };
 288 MODULE_DEVICE_TABLE(of, sti_dt_ids);
 289
 290 static struct platform_driver sti_platform_driver = {
 291         .probe = sti_platform_probe,
 292         .remove = sti_platform_remove,
 293         .driver = {
 294                 .name = DRIVER_NAME,
 295                 .of_match_table = sti_dt_ids,
 296         },
 297 };
 298
 299 static struct platform_driver * const drivers[] = {
 300         &sti_tvout_driver,
 301         &sti_hqvdp_driver,
 302         &sti_hdmi_driver,
 303         &sti_hda_driver,
 304         &sti_dvo_driver,
 305         &sti_vtg_driver,
 306         &sti_compositor_driver,
 307         &sti_platform_driver,
 308 };
 309
 310 static int sti_drm_init(void)
 311 {
 312         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 313 }
 314 module_init(sti_drm_init);
 315
 316 static void sti_drm_exit(void)
 317 {
 318         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 319 }
 320 module_exit(sti_drm_exit);
 321
 322 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 323 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 324 MODULE_LICENSE("GPL");