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_drv.h" 27 #include "sti_plane.h" 28 29 #define DRIVER_NAME "sti" 30 #define DRIVER_DESC "STMicroelectronics SoC DRM" 31 #define DRIVER_DATE "20140601" 32 #define DRIVER_MAJOR 1 33 #define DRIVER_MINOR 0 34 35 #define STI_MAX_FB_HEIGHT 4096 36 #define STI_MAX_FB_WIDTH 4096 37 38 static int sti_drm_fps_get(void *data, u64 *val) 39 { 40 struct drm_device *drm_dev = data; 41 struct drm_plane *p; 42 unsigned int i = 0; 43 44 *val = 0; 45 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { 46 struct sti_plane *plane = to_sti_plane(p); 47 48 *val |= plane->fps_info.output << i; 49 i++; 50 } 51 52 return 0; 53 } 54 55 static int sti_drm_fps_set(void *data, u64 val) 56 { 57 struct drm_device *drm_dev = data; 58 struct drm_plane *p; 59 unsigned int i = 0; 60 61 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { 62 struct sti_plane *plane = to_sti_plane(p); 63 64 memset(&plane->fps_info, 0, sizeof(plane->fps_info)); 65 plane->fps_info.output = (val >> i) & 1; 66 67 i++; 68 } 69 70 return 0; 71 } 72 73 DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops, 74 sti_drm_fps_get, sti_drm_fps_set, "%llu\n"); 75 76 static int sti_drm_fps_dbg_show(struct seq_file *s, void *data) 77 { 78 struct drm_info_node *node = s->private; 79 struct drm_device *dev = node->minor->dev; 80 struct drm_plane *p; 81 82 list_for_each_entry(p, &dev->mode_config.plane_list, head) { 83 struct sti_plane *plane = to_sti_plane(p); 84 85 seq_printf(s, "%s%s\n", 86 plane->fps_info.fps_str, 87 plane->fps_info.fips_str); 88 } 89 90 return 0; 91 } 92 93 static struct drm_info_list sti_drm_dbg_list[] = { 94 {"fps_get", sti_drm_fps_dbg_show, 0}, 95 }; 96 97 static int sti_drm_dbg_init(struct drm_minor *minor) 98 { 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 debugfs_create_file("fps_show", S_IRUGO | S_IWUSR, minor->debugfs_root, 108 minor->dev, &sti_drm_fps_fops); 109 110 DRM_INFO("%s: debugfs installed\n", DRIVER_NAME); 111 return 0; 112 err: 113 DRM_ERROR("%s: cannot install debugfs\n", DRIVER_NAME); 114 return ret; 115 } 116 117 static const struct drm_mode_config_funcs sti_mode_config_funcs = { 118 .fb_create = drm_gem_fb_create, 119 .atomic_check = drm_atomic_helper_check, 120 .atomic_commit = drm_atomic_helper_commit, 121 }; 122 123 static void sti_mode_config_init(struct drm_device *dev) 124 { 125 dev->mode_config.min_width = 0; 126 dev->mode_config.min_height = 0; 127 128 /* 129 * set max width and height as default value. 130 * this value would be used to check framebuffer size limitation 131 * at drm_mode_addfb(). 132 */ 133 dev->mode_config.max_width = STI_MAX_FB_WIDTH; 134 dev->mode_config.max_height = STI_MAX_FB_HEIGHT; 135 136 dev->mode_config.funcs = &sti_mode_config_funcs; 137 138 dev->mode_config.normalize_zpos = true; 139 } 140 141 DEFINE_DRM_GEM_CMA_FOPS(sti_driver_fops); 142 143 static struct drm_driver sti_driver = { 144 .driver_features = DRIVER_MODESET | 145 DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC, 146 .gem_free_object_unlocked = drm_gem_cma_free_object, 147 .gem_vm_ops = &drm_gem_cma_vm_ops, 148 .dumb_create = drm_gem_cma_dumb_create, 149 .fops = &sti_driver_fops, 150 151 .enable_vblank = sti_crtc_enable_vblank, 152 .disable_vblank = sti_crtc_disable_vblank, 153 154 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 155 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 156 .gem_prime_export = drm_gem_prime_export, 157 .gem_prime_import = drm_gem_prime_import, 158 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 159 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 160 .gem_prime_vmap = drm_gem_cma_prime_vmap, 161 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 162 .gem_prime_mmap = drm_gem_cma_prime_mmap, 163 164 .debugfs_init = sti_drm_dbg_init, 165 166 .name = DRIVER_NAME, 167 .desc = DRIVER_DESC, 168 .date = DRIVER_DATE, 169 .major = DRIVER_MAJOR, 170 .minor = DRIVER_MINOR, 171 }; 172 173 static int compare_of(struct device *dev, void *data) 174 { 175 return dev->of_node == data; 176 } 177 178 static int sti_init(struct drm_device *ddev) 179 { 180 struct sti_private *private; 181 182 private = kzalloc(sizeof(*private), GFP_KERNEL); 183 if (!private) 184 return -ENOMEM; 185 186 ddev->dev_private = (void *)private; 187 dev_set_drvdata(ddev->dev, ddev); 188 private->drm_dev = ddev; 189 190 drm_mode_config_init(ddev); 191 192 sti_mode_config_init(ddev); 193 194 drm_kms_helper_poll_init(ddev); 195 196 return 0; 197 } 198 199 static void sti_cleanup(struct drm_device *ddev) 200 { 201 struct sti_private *private = ddev->dev_private; 202 203 drm_kms_helper_poll_fini(ddev); 204 drm_atomic_helper_shutdown(ddev); 205 drm_mode_config_cleanup(ddev); 206 component_unbind_all(ddev->dev, ddev); 207 kfree(private); 208 ddev->dev_private = NULL; 209 } 210 211 static int sti_bind(struct device *dev) 212 { 213 struct drm_device *ddev; 214 int ret; 215 216 ddev = drm_dev_alloc(&sti_driver, dev); 217 if (IS_ERR(ddev)) 218 return PTR_ERR(ddev); 219 220 ret = sti_init(ddev); 221 if (ret) 222 goto err_drm_dev_put; 223 224 ret = component_bind_all(ddev->dev, ddev); 225 if (ret) 226 goto err_cleanup; 227 228 ret = drm_dev_register(ddev, 0); 229 if (ret) 230 goto err_cleanup; 231 232 drm_mode_config_reset(ddev); 233 234 drm_fbdev_generic_setup(ddev, 32); 235 236 return 0; 237 238 err_cleanup: 239 sti_cleanup(ddev); 240 err_drm_dev_put: 241 drm_dev_put(ddev); 242 return ret; 243 } 244 245 static void sti_unbind(struct device *dev) 246 { 247 struct drm_device *ddev = dev_get_drvdata(dev); 248 249 drm_dev_unregister(ddev); 250 sti_cleanup(ddev); 251 drm_dev_put(ddev); 252 } 253 254 static const struct component_master_ops sti_ops = { 255 .bind = sti_bind, 256 .unbind = sti_unbind, 257 }; 258 259 static int sti_platform_probe(struct platform_device *pdev) 260 { 261 struct device *dev = &pdev->dev; 262 struct device_node *node = dev->of_node; 263 struct device_node *child_np; 264 struct component_match *match = NULL; 265 266 dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); 267 268 devm_of_platform_populate(dev); 269 270 child_np = of_get_next_available_child(node, NULL); 271 272 while (child_np) { 273 drm_of_component_match_add(dev, &match, compare_of, 274 child_np); 275 child_np = of_get_next_available_child(node, child_np); 276 } 277 278 return component_master_add_with_match(dev, &sti_ops, match); 279 } 280 281 static int sti_platform_remove(struct platform_device *pdev) 282 { 283 component_master_del(&pdev->dev, &sti_ops); 284 285 return 0; 286 } 287 288 static const struct of_device_id sti_dt_ids[] = { 289 { .compatible = "st,sti-display-subsystem", }, 290 { /* end node */ }, 291 }; 292 MODULE_DEVICE_TABLE(of, sti_dt_ids); 293 294 static struct platform_driver sti_platform_driver = { 295 .probe = sti_platform_probe, 296 .remove = sti_platform_remove, 297 .driver = { 298 .name = DRIVER_NAME, 299 .of_match_table = sti_dt_ids, 300 }, 301 }; 302 303 static struct platform_driver * const drivers[] = { 304 &sti_tvout_driver, 305 &sti_hqvdp_driver, 306 &sti_hdmi_driver, 307 &sti_hda_driver, 308 &sti_dvo_driver, 309 &sti_vtg_driver, 310 &sti_compositor_driver, 311 &sti_platform_driver, 312 }; 313 314 static int sti_drm_init(void) 315 { 316 return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); 317 } 318 module_init(sti_drm_init); 319 320 static void sti_drm_exit(void) 321 { 322 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); 323 } 324 module_exit(sti_drm_exit); 325 326 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>"); 327 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); 328 MODULE_LICENSE("GPL"); 329