1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012 Russell King 4 */ 5 #include <linux/clk.h> 6 #include <linux/component.h> 7 #include <linux/module.h> 8 #include <linux/of_graph.h> 9 #include <drm/drm_atomic_helper.h> 10 #include <drm/drm_probe_helper.h> 11 #include <drm/drm_fb_helper.h> 12 #include <drm/drm_of.h> 13 #include "armada_crtc.h" 14 #include "armada_drm.h" 15 #include "armada_gem.h" 16 #include "armada_fb.h" 17 #include "armada_hw.h" 18 #include <drm/armada_drm.h> 19 #include "armada_ioctlP.h" 20 21 static struct drm_ioctl_desc armada_ioctls[] = { 22 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0), 23 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0), 24 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0), 25 }; 26 27 DEFINE_DRM_GEM_FOPS(armada_drm_fops); 28 29 static struct drm_driver armada_drm_driver = { 30 .lastclose = drm_fb_helper_lastclose, 31 .gem_free_object_unlocked = armada_gem_free_object, 32 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 33 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 34 .gem_prime_export = armada_gem_prime_export, 35 .gem_prime_import = armada_gem_prime_import, 36 .dumb_create = armada_gem_dumb_create, 37 .gem_vm_ops = &armada_gem_vm_ops, 38 .major = 1, 39 .minor = 0, 40 .name = "armada-drm", 41 .desc = "Armada SoC DRM", 42 .date = "20120730", 43 .driver_features = DRIVER_GEM | DRIVER_MODESET | 44 DRIVER_PRIME | DRIVER_ATOMIC, 45 .ioctls = armada_ioctls, 46 .fops = &armada_drm_fops, 47 }; 48 49 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = { 50 .fb_create = armada_fb_create, 51 .output_poll_changed = drm_fb_helper_output_poll_changed, 52 .atomic_check = drm_atomic_helper_check, 53 .atomic_commit = drm_atomic_helper_commit, 54 }; 55 56 static int armada_drm_bind(struct device *dev) 57 { 58 struct armada_private *priv; 59 struct resource *mem = NULL; 60 int ret, n; 61 62 for (n = 0; ; n++) { 63 struct resource *r = platform_get_resource(to_platform_device(dev), 64 IORESOURCE_MEM, n); 65 if (!r) 66 break; 67 68 /* Resources above 64K are graphics memory */ 69 if (resource_size(r) > SZ_64K) 70 mem = r; 71 else 72 return -EINVAL; 73 } 74 75 if (!mem) 76 return -ENXIO; 77 78 if (!devm_request_mem_region(dev, mem->start, resource_size(mem), 79 "armada-drm")) 80 return -EBUSY; 81 82 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 83 if (!priv) 84 return -ENOMEM; 85 86 /* 87 * The drm_device structure must be at the start of 88 * armada_private for drm_dev_put() to work correctly. 89 */ 90 BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0); 91 92 ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev); 93 if (ret) { 94 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n", 95 __func__, ret); 96 kfree(priv); 97 return ret; 98 } 99 100 priv->drm.dev_private = priv; 101 102 dev_set_drvdata(dev, &priv->drm); 103 104 /* Mode setting support */ 105 drm_mode_config_init(&priv->drm); 106 priv->drm.mode_config.min_width = 320; 107 priv->drm.mode_config.min_height = 200; 108 109 /* 110 * With vscale enabled, the maximum width is 1920 due to the 111 * 1920 by 3 lines RAM 112 */ 113 priv->drm.mode_config.max_width = 1920; 114 priv->drm.mode_config.max_height = 2048; 115 116 priv->drm.mode_config.preferred_depth = 24; 117 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs; 118 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 119 mutex_init(&priv->linear_lock); 120 121 ret = component_bind_all(dev, &priv->drm); 122 if (ret) 123 goto err_kms; 124 125 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc); 126 if (ret) 127 goto err_comp; 128 129 priv->drm.irq_enabled = true; 130 131 drm_mode_config_reset(&priv->drm); 132 133 ret = armada_fbdev_init(&priv->drm); 134 if (ret) 135 goto err_comp; 136 137 drm_kms_helper_poll_init(&priv->drm); 138 139 ret = drm_dev_register(&priv->drm, 0); 140 if (ret) 141 goto err_poll; 142 143 #ifdef CONFIG_DEBUG_FS 144 armada_drm_debugfs_init(priv->drm.primary); 145 #endif 146 147 return 0; 148 149 err_poll: 150 drm_kms_helper_poll_fini(&priv->drm); 151 armada_fbdev_fini(&priv->drm); 152 err_comp: 153 component_unbind_all(dev, &priv->drm); 154 err_kms: 155 drm_mode_config_cleanup(&priv->drm); 156 drm_mm_takedown(&priv->linear); 157 drm_dev_put(&priv->drm); 158 return ret; 159 } 160 161 static void armada_drm_unbind(struct device *dev) 162 { 163 struct drm_device *drm = dev_get_drvdata(dev); 164 struct armada_private *priv = drm->dev_private; 165 166 drm_kms_helper_poll_fini(&priv->drm); 167 armada_fbdev_fini(&priv->drm); 168 169 drm_dev_unregister(&priv->drm); 170 171 component_unbind_all(dev, &priv->drm); 172 173 drm_mode_config_cleanup(&priv->drm); 174 drm_mm_takedown(&priv->linear); 175 176 drm_dev_put(&priv->drm); 177 } 178 179 static int compare_of(struct device *dev, void *data) 180 { 181 return dev->of_node == data; 182 } 183 184 static int compare_dev_name(struct device *dev, void *data) 185 { 186 const char *name = data; 187 return !strcmp(dev_name(dev), name); 188 } 189 190 static void armada_add_endpoints(struct device *dev, 191 struct component_match **match, struct device_node *port) 192 { 193 struct device_node *ep, *remote; 194 195 for_each_child_of_node(port, ep) { 196 remote = of_graph_get_remote_port_parent(ep); 197 if (!remote || !of_device_is_available(remote)) { 198 of_node_put(remote); 199 continue; 200 } else if (!of_device_is_available(remote->parent)) { 201 dev_warn(dev, "parent device of %pOF is not available\n", 202 remote); 203 of_node_put(remote); 204 continue; 205 } 206 207 drm_of_component_match_add(dev, match, compare_of, remote); 208 of_node_put(remote); 209 } 210 } 211 212 static const struct component_master_ops armada_master_ops = { 213 .bind = armada_drm_bind, 214 .unbind = armada_drm_unbind, 215 }; 216 217 static int armada_drm_probe(struct platform_device *pdev) 218 { 219 struct component_match *match = NULL; 220 struct device *dev = &pdev->dev; 221 int ret; 222 223 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); 224 if (ret != -EINVAL) 225 return ret; 226 227 if (dev->platform_data) { 228 char **devices = dev->platform_data; 229 struct device_node *port; 230 struct device *d; 231 int i; 232 233 for (i = 0; devices[i]; i++) 234 component_match_add(dev, &match, compare_dev_name, 235 devices[i]); 236 237 if (i == 0) { 238 dev_err(dev, "missing 'ports' property\n"); 239 return -ENODEV; 240 } 241 242 for (i = 0; devices[i]; i++) { 243 d = bus_find_device_by_name(&platform_bus_type, NULL, 244 devices[i]); 245 if (d && d->of_node) { 246 for_each_child_of_node(d->of_node, port) 247 armada_add_endpoints(dev, &match, port); 248 } 249 put_device(d); 250 } 251 } 252 253 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 254 match); 255 } 256 257 static int armada_drm_remove(struct platform_device *pdev) 258 { 259 component_master_del(&pdev->dev, &armada_master_ops); 260 return 0; 261 } 262 263 static const struct platform_device_id armada_drm_platform_ids[] = { 264 { 265 .name = "armada-drm", 266 }, { 267 .name = "armada-510-drm", 268 }, 269 { }, 270 }; 271 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 272 273 static struct platform_driver armada_drm_platform_driver = { 274 .probe = armada_drm_probe, 275 .remove = armada_drm_remove, 276 .driver = { 277 .name = "armada-drm", 278 }, 279 .id_table = armada_drm_platform_ids, 280 }; 281 282 static int __init armada_drm_init(void) 283 { 284 int ret; 285 286 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls); 287 288 ret = platform_driver_register(&armada_lcd_platform_driver); 289 if (ret) 290 return ret; 291 ret = platform_driver_register(&armada_drm_platform_driver); 292 if (ret) 293 platform_driver_unregister(&armada_lcd_platform_driver); 294 return ret; 295 } 296 module_init(armada_drm_init); 297 298 static void __exit armada_drm_exit(void) 299 { 300 platform_driver_unregister(&armada_drm_platform_driver); 301 platform_driver_unregister(&armada_lcd_platform_driver); 302 } 303 module_exit(armada_drm_exit); 304 305 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>"); 306 MODULE_DESCRIPTION("Armada DRM Driver"); 307 MODULE_LICENSE("GPL"); 308 MODULE_ALIAS("platform:armada-drm"); 309