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 | DRIVER_ATOMIC, 44 .ioctls = armada_ioctls, 45 .fops = &armada_drm_fops, 46 }; 47 48 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = { 49 .fb_create = armada_fb_create, 50 .output_poll_changed = drm_fb_helper_output_poll_changed, 51 .atomic_check = drm_atomic_helper_check, 52 .atomic_commit = drm_atomic_helper_commit, 53 }; 54 55 static int armada_drm_bind(struct device *dev) 56 { 57 struct armada_private *priv; 58 struct resource *mem = NULL; 59 int ret, n; 60 61 for (n = 0; ; n++) { 62 struct resource *r = platform_get_resource(to_platform_device(dev), 63 IORESOURCE_MEM, n); 64 if (!r) 65 break; 66 67 /* Resources above 64K are graphics memory */ 68 if (resource_size(r) > SZ_64K) 69 mem = r; 70 else 71 return -EINVAL; 72 } 73 74 if (!mem) 75 return -ENXIO; 76 77 if (!devm_request_mem_region(dev, mem->start, resource_size(mem), 78 "armada-drm")) 79 return -EBUSY; 80 81 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 82 if (!priv) 83 return -ENOMEM; 84 85 /* 86 * The drm_device structure must be at the start of 87 * armada_private for drm_dev_put() to work correctly. 88 */ 89 BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0); 90 91 ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev); 92 if (ret) { 93 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n", 94 __func__, ret); 95 kfree(priv); 96 return ret; 97 } 98 99 /* Remove early framebuffers */ 100 ret = drm_fb_helper_remove_conflicting_framebuffers(NULL, 101 "armada-drm-fb", 102 false); 103 if (ret) { 104 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n", 105 __func__, ret); 106 kfree(priv); 107 return ret; 108 } 109 110 priv->drm.dev_private = priv; 111 112 dev_set_drvdata(dev, &priv->drm); 113 114 /* Mode setting support */ 115 drm_mode_config_init(&priv->drm); 116 priv->drm.mode_config.min_width = 320; 117 priv->drm.mode_config.min_height = 200; 118 119 /* 120 * With vscale enabled, the maximum width is 1920 due to the 121 * 1920 by 3 lines RAM 122 */ 123 priv->drm.mode_config.max_width = 1920; 124 priv->drm.mode_config.max_height = 2048; 125 126 priv->drm.mode_config.preferred_depth = 24; 127 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs; 128 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 129 mutex_init(&priv->linear_lock); 130 131 ret = component_bind_all(dev, &priv->drm); 132 if (ret) 133 goto err_kms; 134 135 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc); 136 if (ret) 137 goto err_comp; 138 139 priv->drm.irq_enabled = true; 140 141 drm_mode_config_reset(&priv->drm); 142 143 ret = armada_fbdev_init(&priv->drm); 144 if (ret) 145 goto err_comp; 146 147 drm_kms_helper_poll_init(&priv->drm); 148 149 ret = drm_dev_register(&priv->drm, 0); 150 if (ret) 151 goto err_poll; 152 153 #ifdef CONFIG_DEBUG_FS 154 armada_drm_debugfs_init(priv->drm.primary); 155 #endif 156 157 return 0; 158 159 err_poll: 160 drm_kms_helper_poll_fini(&priv->drm); 161 armada_fbdev_fini(&priv->drm); 162 err_comp: 163 component_unbind_all(dev, &priv->drm); 164 err_kms: 165 drm_mode_config_cleanup(&priv->drm); 166 drm_mm_takedown(&priv->linear); 167 drm_dev_put(&priv->drm); 168 return ret; 169 } 170 171 static void armada_drm_unbind(struct device *dev) 172 { 173 struct drm_device *drm = dev_get_drvdata(dev); 174 struct armada_private *priv = drm->dev_private; 175 176 drm_kms_helper_poll_fini(&priv->drm); 177 armada_fbdev_fini(&priv->drm); 178 179 drm_dev_unregister(&priv->drm); 180 181 drm_atomic_helper_shutdown(&priv->drm); 182 183 component_unbind_all(dev, &priv->drm); 184 185 drm_mode_config_cleanup(&priv->drm); 186 drm_mm_takedown(&priv->linear); 187 188 drm_dev_put(&priv->drm); 189 } 190 191 static int compare_of(struct device *dev, void *data) 192 { 193 return dev->of_node == data; 194 } 195 196 static int compare_dev_name(struct device *dev, void *data) 197 { 198 const char *name = data; 199 return !strcmp(dev_name(dev), name); 200 } 201 202 static void armada_add_endpoints(struct device *dev, 203 struct component_match **match, struct device_node *dev_node) 204 { 205 struct device_node *ep, *remote; 206 207 for_each_endpoint_of_node(dev_node, ep) { 208 remote = of_graph_get_remote_port_parent(ep); 209 if (remote && of_device_is_available(remote)) 210 drm_of_component_match_add(dev, match, compare_of, 211 remote); 212 of_node_put(remote); 213 } 214 } 215 216 static const struct component_master_ops armada_master_ops = { 217 .bind = armada_drm_bind, 218 .unbind = armada_drm_unbind, 219 }; 220 221 static int armada_drm_probe(struct platform_device *pdev) 222 { 223 struct component_match *match = NULL; 224 struct device *dev = &pdev->dev; 225 int ret; 226 227 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); 228 if (ret != -EINVAL) 229 return ret; 230 231 if (dev->platform_data) { 232 char **devices = dev->platform_data; 233 struct device *d; 234 int i; 235 236 for (i = 0; devices[i]; i++) 237 component_match_add(dev, &match, compare_dev_name, 238 devices[i]); 239 240 if (i == 0) { 241 dev_err(dev, "missing 'ports' property\n"); 242 return -ENODEV; 243 } 244 245 for (i = 0; devices[i]; i++) { 246 d = bus_find_device_by_name(&platform_bus_type, NULL, 247 devices[i]); 248 if (d && d->of_node) 249 armada_add_endpoints(dev, &match, d->of_node); 250 put_device(d); 251 } 252 } 253 254 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 255 match); 256 } 257 258 static int armada_drm_remove(struct platform_device *pdev) 259 { 260 component_master_del(&pdev->dev, &armada_master_ops); 261 return 0; 262 } 263 264 static const struct platform_device_id armada_drm_platform_ids[] = { 265 { 266 .name = "armada-drm", 267 }, { 268 .name = "armada-510-drm", 269 }, 270 { }, 271 }; 272 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 273 274 static struct platform_driver armada_drm_platform_driver = { 275 .probe = armada_drm_probe, 276 .remove = armada_drm_remove, 277 .driver = { 278 .name = "armada-drm", 279 }, 280 .id_table = armada_drm_platform_ids, 281 }; 282 283 static int __init armada_drm_init(void) 284 { 285 int ret; 286 287 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls); 288 289 ret = platform_driver_register(&armada_lcd_platform_driver); 290 if (ret) 291 return ret; 292 ret = platform_driver_register(&armada_drm_platform_driver); 293 if (ret) 294 platform_driver_unregister(&armada_lcd_platform_driver); 295 return ret; 296 } 297 module_init(armada_drm_init); 298 299 static void __exit armada_drm_exit(void) 300 { 301 platform_driver_unregister(&armada_drm_platform_driver); 302 platform_driver_unregister(&armada_lcd_platform_driver); 303 } 304 module_exit(armada_drm_exit); 305 306 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>"); 307 MODULE_DESCRIPTION("Armada DRM Driver"); 308 MODULE_LICENSE("GPL"); 309 MODULE_ALIAS("platform:armada-drm"); 310