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"); 340