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