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