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