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"); 325