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