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 /* Remove early framebuffers */ 101 ret = drm_fb_helper_remove_conflicting_framebuffers(NULL, 102 "armada-drm-fb", 103 false); 104 if (ret) { 105 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n", 106 __func__, ret); 107 kfree(priv); 108 return ret; 109 } 110 111 priv->drm.dev_private = priv; 112 113 dev_set_drvdata(dev, &priv->drm); 114 115 /* Mode setting support */ 116 drm_mode_config_init(&priv->drm); 117 priv->drm.mode_config.min_width = 320; 118 priv->drm.mode_config.min_height = 200; 119 120 /* 121 * With vscale enabled, the maximum width is 1920 due to the 122 * 1920 by 3 lines RAM 123 */ 124 priv->drm.mode_config.max_width = 1920; 125 priv->drm.mode_config.max_height = 2048; 126 127 priv->drm.mode_config.preferred_depth = 24; 128 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs; 129 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 130 mutex_init(&priv->linear_lock); 131 132 ret = component_bind_all(dev, &priv->drm); 133 if (ret) 134 goto err_kms; 135 136 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc); 137 if (ret) 138 goto err_comp; 139 140 priv->drm.irq_enabled = true; 141 142 drm_mode_config_reset(&priv->drm); 143 144 ret = armada_fbdev_init(&priv->drm); 145 if (ret) 146 goto err_comp; 147 148 drm_kms_helper_poll_init(&priv->drm); 149 150 ret = drm_dev_register(&priv->drm, 0); 151 if (ret) 152 goto err_poll; 153 154 #ifdef CONFIG_DEBUG_FS 155 armada_drm_debugfs_init(priv->drm.primary); 156 #endif 157 158 return 0; 159 160 err_poll: 161 drm_kms_helper_poll_fini(&priv->drm); 162 armada_fbdev_fini(&priv->drm); 163 err_comp: 164 component_unbind_all(dev, &priv->drm); 165 err_kms: 166 drm_mode_config_cleanup(&priv->drm); 167 drm_mm_takedown(&priv->linear); 168 drm_dev_put(&priv->drm); 169 return ret; 170 } 171 172 static void armada_drm_unbind(struct device *dev) 173 { 174 struct drm_device *drm = dev_get_drvdata(dev); 175 struct armada_private *priv = drm->dev_private; 176 177 drm_kms_helper_poll_fini(&priv->drm); 178 armada_fbdev_fini(&priv->drm); 179 180 drm_dev_unregister(&priv->drm); 181 182 drm_atomic_helper_shutdown(&priv->drm); 183 184 component_unbind_all(dev, &priv->drm); 185 186 drm_mode_config_cleanup(&priv->drm); 187 drm_mm_takedown(&priv->linear); 188 189 drm_dev_put(&priv->drm); 190 } 191 192 static int compare_of(struct device *dev, void *data) 193 { 194 return dev->of_node == data; 195 } 196 197 static int compare_dev_name(struct device *dev, void *data) 198 { 199 const char *name = data; 200 return !strcmp(dev_name(dev), name); 201 } 202 203 static void armada_add_endpoints(struct device *dev, 204 struct component_match **match, struct device_node *dev_node) 205 { 206 struct device_node *ep, *remote; 207 208 for_each_endpoint_of_node(dev_node, ep) { 209 remote = of_graph_get_remote_port_parent(ep); 210 if (remote && of_device_is_available(remote)) 211 drm_of_component_match_add(dev, match, compare_of, 212 remote); 213 of_node_put(remote); 214 } 215 } 216 217 static const struct component_master_ops armada_master_ops = { 218 .bind = armada_drm_bind, 219 .unbind = armada_drm_unbind, 220 }; 221 222 static int armada_drm_probe(struct platform_device *pdev) 223 { 224 struct component_match *match = NULL; 225 struct device *dev = &pdev->dev; 226 int ret; 227 228 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); 229 if (ret != -EINVAL) 230 return ret; 231 232 if (dev->platform_data) { 233 char **devices = dev->platform_data; 234 struct device *d; 235 int i; 236 237 for (i = 0; devices[i]; i++) 238 component_match_add(dev, &match, compare_dev_name, 239 devices[i]); 240 241 if (i == 0) { 242 dev_err(dev, "missing 'ports' property\n"); 243 return -ENODEV; 244 } 245 246 for (i = 0; devices[i]; i++) { 247 d = bus_find_device_by_name(&platform_bus_type, NULL, 248 devices[i]); 249 if (d && d->of_node) 250 armada_add_endpoints(dev, &match, d->of_node); 251 put_device(d); 252 } 253 } 254 255 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 256 match); 257 } 258 259 static int armada_drm_remove(struct platform_device *pdev) 260 { 261 component_master_del(&pdev->dev, &armada_master_ops); 262 return 0; 263 } 264 265 static const struct platform_device_id armada_drm_platform_ids[] = { 266 { 267 .name = "armada-drm", 268 }, { 269 .name = "armada-510-drm", 270 }, 271 { }, 272 }; 273 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 274 275 static struct platform_driver armada_drm_platform_driver = { 276 .probe = armada_drm_probe, 277 .remove = armada_drm_remove, 278 .driver = { 279 .name = "armada-drm", 280 }, 281 .id_table = armada_drm_platform_ids, 282 }; 283 284 static int __init armada_drm_init(void) 285 { 286 int ret; 287 288 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls); 289 290 ret = platform_driver_register(&armada_lcd_platform_driver); 291 if (ret) 292 return ret; 293 ret = platform_driver_register(&armada_drm_platform_driver); 294 if (ret) 295 platform_driver_unregister(&armada_lcd_platform_driver); 296 return ret; 297 } 298 module_init(armada_drm_init); 299 300 static void __exit armada_drm_exit(void) 301 { 302 platform_driver_unregister(&armada_drm_platform_driver); 303 platform_driver_unregister(&armada_lcd_platform_driver); 304 } 305 module_exit(armada_drm_exit); 306 307 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>"); 308 MODULE_DESCRIPTION("Armada DRM Driver"); 309 MODULE_LICENSE("GPL"); 310 MODULE_ALIAS("platform:armada-drm"); 311