1 /* 2 * Copyright (C) 2012 Russell King 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 #include <linux/clk.h> 9 #include <linux/component.h> 10 #include <linux/module.h> 11 #include <linux/of_graph.h> 12 #include <drm/drm_atomic_helper.h> 13 #include <drm/drm_crtc_helper.h> 14 #include <drm/drm_fb_helper.h> 15 #include <drm/drm_of.h> 16 #include "armada_crtc.h" 17 #include "armada_drm.h" 18 #include "armada_gem.h" 19 #include "armada_fb.h" 20 #include "armada_hw.h" 21 #include <drm/armada_drm.h> 22 #include "armada_ioctlP.h" 23 24 static struct drm_ioctl_desc armada_ioctls[] = { 25 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0), 26 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0), 27 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0), 28 }; 29 30 DEFINE_DRM_GEM_FOPS(armada_drm_fops); 31 32 static struct drm_driver armada_drm_driver = { 33 .lastclose = drm_fb_helper_lastclose, 34 .gem_free_object_unlocked = armada_gem_free_object, 35 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 36 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 37 .gem_prime_export = armada_gem_prime_export, 38 .gem_prime_import = armada_gem_prime_import, 39 .dumb_create = armada_gem_dumb_create, 40 .gem_vm_ops = &armada_gem_vm_ops, 41 .major = 1, 42 .minor = 0, 43 .name = "armada-drm", 44 .desc = "Armada SoC DRM", 45 .date = "20120730", 46 .driver_features = DRIVER_GEM | DRIVER_MODESET | 47 DRIVER_PRIME | DRIVER_ATOMIC, 48 .ioctls = armada_ioctls, 49 .fops = &armada_drm_fops, 50 }; 51 52 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = { 53 .fb_create = armada_fb_create, 54 .output_poll_changed = drm_fb_helper_output_poll_changed, 55 .atomic_check = drm_atomic_helper_check, 56 .atomic_commit = drm_atomic_helper_commit, 57 }; 58 59 static int armada_drm_bind(struct device *dev) 60 { 61 struct armada_private *priv; 62 struct resource *mem = NULL; 63 int ret, n; 64 65 for (n = 0; ; n++) { 66 struct resource *r = platform_get_resource(to_platform_device(dev), 67 IORESOURCE_MEM, n); 68 if (!r) 69 break; 70 71 /* Resources above 64K are graphics memory */ 72 if (resource_size(r) > SZ_64K) 73 mem = r; 74 else 75 return -EINVAL; 76 } 77 78 if (!mem) 79 return -ENXIO; 80 81 if (!devm_request_mem_region(dev, mem->start, resource_size(mem), 82 "armada-drm")) 83 return -EBUSY; 84 85 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 86 if (!priv) 87 return -ENOMEM; 88 89 /* 90 * The drm_device structure must be at the start of 91 * armada_private for drm_dev_put() to work correctly. 92 */ 93 BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0); 94 95 ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev); 96 if (ret) { 97 dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n", 98 __func__, ret); 99 kfree(priv); 100 return ret; 101 } 102 103 priv->drm.dev_private = priv; 104 105 dev_set_drvdata(dev, &priv->drm); 106 107 /* Mode setting support */ 108 drm_mode_config_init(&priv->drm); 109 priv->drm.mode_config.min_width = 320; 110 priv->drm.mode_config.min_height = 200; 111 112 /* 113 * With vscale enabled, the maximum width is 1920 due to the 114 * 1920 by 3 lines RAM 115 */ 116 priv->drm.mode_config.max_width = 1920; 117 priv->drm.mode_config.max_height = 2048; 118 119 priv->drm.mode_config.preferred_depth = 24; 120 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs; 121 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 122 mutex_init(&priv->linear_lock); 123 124 ret = component_bind_all(dev, &priv->drm); 125 if (ret) 126 goto err_kms; 127 128 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc); 129 if (ret) 130 goto err_comp; 131 132 priv->drm.irq_enabled = true; 133 134 drm_mode_config_reset(&priv->drm); 135 136 ret = armada_fbdev_init(&priv->drm); 137 if (ret) 138 goto err_comp; 139 140 drm_kms_helper_poll_init(&priv->drm); 141 142 ret = drm_dev_register(&priv->drm, 0); 143 if (ret) 144 goto err_poll; 145 146 #ifdef CONFIG_DEBUG_FS 147 armada_drm_debugfs_init(priv->drm.primary); 148 #endif 149 150 return 0; 151 152 err_poll: 153 drm_kms_helper_poll_fini(&priv->drm); 154 armada_fbdev_fini(&priv->drm); 155 err_comp: 156 component_unbind_all(dev, &priv->drm); 157 err_kms: 158 drm_mode_config_cleanup(&priv->drm); 159 drm_mm_takedown(&priv->linear); 160 drm_dev_put(&priv->drm); 161 return ret; 162 } 163 164 static void armada_drm_unbind(struct device *dev) 165 { 166 struct drm_device *drm = dev_get_drvdata(dev); 167 struct armada_private *priv = drm->dev_private; 168 169 drm_kms_helper_poll_fini(&priv->drm); 170 armada_fbdev_fini(&priv->drm); 171 172 drm_dev_unregister(&priv->drm); 173 174 component_unbind_all(dev, &priv->drm); 175 176 drm_mode_config_cleanup(&priv->drm); 177 drm_mm_takedown(&priv->linear); 178 179 drm_dev_put(&priv->drm); 180 } 181 182 static int compare_of(struct device *dev, void *data) 183 { 184 return dev->of_node == data; 185 } 186 187 static int compare_dev_name(struct device *dev, void *data) 188 { 189 const char *name = data; 190 return !strcmp(dev_name(dev), name); 191 } 192 193 static void armada_add_endpoints(struct device *dev, 194 struct component_match **match, struct device_node *port) 195 { 196 struct device_node *ep, *remote; 197 198 for_each_child_of_node(port, ep) { 199 remote = of_graph_get_remote_port_parent(ep); 200 if (!remote || !of_device_is_available(remote)) { 201 of_node_put(remote); 202 continue; 203 } else if (!of_device_is_available(remote->parent)) { 204 dev_warn(dev, "parent device of %pOF is not available\n", 205 remote); 206 of_node_put(remote); 207 continue; 208 } 209 210 drm_of_component_match_add(dev, match, compare_of, remote); 211 of_node_put(remote); 212 } 213 } 214 215 static const struct component_master_ops armada_master_ops = { 216 .bind = armada_drm_bind, 217 .unbind = armada_drm_unbind, 218 }; 219 220 static int armada_drm_probe(struct platform_device *pdev) 221 { 222 struct component_match *match = NULL; 223 struct device *dev = &pdev->dev; 224 int ret; 225 226 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); 227 if (ret != -EINVAL) 228 return ret; 229 230 if (dev->platform_data) { 231 char **devices = dev->platform_data; 232 struct device_node *port; 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 for_each_child_of_node(d->of_node, port) 250 armada_add_endpoints(dev, &match, port); 251 } 252 put_device(d); 253 } 254 } 255 256 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 257 match); 258 } 259 260 static int armada_drm_remove(struct platform_device *pdev) 261 { 262 component_master_del(&pdev->dev, &armada_master_ops); 263 return 0; 264 } 265 266 static const struct platform_device_id armada_drm_platform_ids[] = { 267 { 268 .name = "armada-drm", 269 }, { 270 .name = "armada-510-drm", 271 }, 272 { }, 273 }; 274 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 275 276 static struct platform_driver armada_drm_platform_driver = { 277 .probe = armada_drm_probe, 278 .remove = armada_drm_remove, 279 .driver = { 280 .name = "armada-drm", 281 }, 282 .id_table = armada_drm_platform_ids, 283 }; 284 285 static int __init armada_drm_init(void) 286 { 287 int ret; 288 289 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls); 290 291 ret = platform_driver_register(&armada_lcd_platform_driver); 292 if (ret) 293 return ret; 294 ret = platform_driver_register(&armada_drm_platform_driver); 295 if (ret) 296 platform_driver_unregister(&armada_lcd_platform_driver); 297 return ret; 298 } 299 module_init(armada_drm_init); 300 301 static void __exit armada_drm_exit(void) 302 { 303 platform_driver_unregister(&armada_drm_platform_driver); 304 platform_driver_unregister(&armada_lcd_platform_driver); 305 } 306 module_exit(armada_drm_exit); 307 308 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>"); 309 MODULE_DESCRIPTION("Armada DRM Driver"); 310 MODULE_LICENSE("GPL"); 311 MODULE_ALIAS("platform:armada-drm"); 312