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"); 358