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.h> 10 #include <linux/of_graph.h> 11 #include <linux/platform_device.h> 12 13 #include <drm/drm_aperture.h> 14 #include <drm/drm_atomic_helper.h> 15 #include <drm/drm_drv.h> 16 #include <drm/drm_ioctl.h> 17 #include <drm/drm_managed.h> 18 #include <drm/drm_prime.h> 19 #include <drm/drm_probe_helper.h> 20 #include <drm/drm_of.h> 21 #include <drm/drm_vblank.h> 22 23 #include "armada_crtc.h" 24 #include "armada_drm.h" 25 #include "armada_gem.h" 26 #include "armada_fb.h" 27 #include "armada_hw.h" 28 #include <drm/armada_drm.h> 29 #include "armada_ioctlP.h" 30 31 static const struct drm_ioctl_desc armada_ioctls[] = { 32 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0), 33 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0), 34 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0), 35 }; 36 37 DEFINE_DRM_GEM_FOPS(armada_drm_fops); 38 39 static const struct drm_driver armada_drm_driver = { 40 .gem_prime_import = armada_gem_prime_import, 41 .dumb_create = armada_gem_dumb_create, 42 .major = 1, 43 .minor = 0, 44 .name = "armada-drm", 45 .desc = "Armada SoC DRM", 46 .date = "20120730", 47 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 48 .ioctls = armada_ioctls, 49 .num_ioctls = ARRAY_SIZE(armada_ioctls), 50 .fops = &armada_drm_fops, 51 }; 52 53 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = { 54 .fb_create = armada_fb_create, 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 = devm_drm_dev_alloc(dev, &armada_drm_driver, 86 struct armada_private, drm); 87 if (IS_ERR(priv)) { 88 dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n", 89 __func__, PTR_ERR(priv)); 90 return PTR_ERR(priv); 91 } 92 93 /* Remove early framebuffers */ 94 ret = drm_aperture_remove_framebuffers(&armada_drm_driver); 95 if (ret) { 96 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n", 97 __func__, ret); 98 return ret; 99 } 100 101 dev_set_drvdata(dev, &priv->drm); 102 103 /* Mode setting support */ 104 drm_mode_config_init(&priv->drm); 105 priv->drm.mode_config.min_width = 320; 106 priv->drm.mode_config.min_height = 200; 107 108 /* 109 * With vscale enabled, the maximum width is 1920 due to the 110 * 1920 by 3 lines RAM 111 */ 112 priv->drm.mode_config.max_width = 1920; 113 priv->drm.mode_config.max_height = 2048; 114 115 priv->drm.mode_config.preferred_depth = 24; 116 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs; 117 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 118 mutex_init(&priv->linear_lock); 119 120 ret = component_bind_all(dev, &priv->drm); 121 if (ret) 122 goto err_kms; 123 124 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc); 125 if (ret) 126 goto err_comp; 127 128 drm_mode_config_reset(&priv->drm); 129 130 drm_kms_helper_poll_init(&priv->drm); 131 132 ret = drm_dev_register(&priv->drm, 0); 133 if (ret) 134 goto err_poll; 135 136 #ifdef CONFIG_DEBUG_FS 137 armada_drm_debugfs_init(priv->drm.primary); 138 #endif 139 140 armada_fbdev_setup(&priv->drm); 141 142 return 0; 143 144 err_poll: 145 drm_kms_helper_poll_fini(&priv->drm); 146 err_comp: 147 component_unbind_all(dev, &priv->drm); 148 err_kms: 149 drm_mode_config_cleanup(&priv->drm); 150 drm_mm_takedown(&priv->linear); 151 dev_set_drvdata(dev, NULL); 152 return ret; 153 } 154 155 static void armada_drm_unbind(struct device *dev) 156 { 157 struct drm_device *drm = dev_get_drvdata(dev); 158 struct armada_private *priv = drm_to_armada_dev(drm); 159 160 drm_kms_helper_poll_fini(&priv->drm); 161 162 drm_dev_unregister(&priv->drm); 163 164 drm_atomic_helper_shutdown(&priv->drm); 165 166 component_unbind_all(dev, &priv->drm); 167 168 drm_mode_config_cleanup(&priv->drm); 169 drm_mm_takedown(&priv->linear); 170 dev_set_drvdata(dev, NULL); 171 } 172 173 static void armada_add_endpoints(struct device *dev, 174 struct component_match **match, struct device_node *dev_node) 175 { 176 struct device_node *ep, *remote; 177 178 for_each_endpoint_of_node(dev_node, ep) { 179 remote = of_graph_get_remote_port_parent(ep); 180 if (remote && of_device_is_available(remote)) 181 drm_of_component_match_add(dev, match, component_compare_of, 182 remote); 183 of_node_put(remote); 184 } 185 } 186 187 static const struct component_master_ops armada_master_ops = { 188 .bind = armada_drm_bind, 189 .unbind = armada_drm_unbind, 190 }; 191 192 static int armada_drm_probe(struct platform_device *pdev) 193 { 194 struct component_match *match = NULL; 195 struct device *dev = &pdev->dev; 196 int ret; 197 198 ret = drm_of_component_probe(dev, component_compare_dev_name, &armada_master_ops); 199 if (ret != -EINVAL) 200 return ret; 201 202 if (dev->platform_data) { 203 char **devices = dev->platform_data; 204 struct device *d; 205 int i; 206 207 for (i = 0; devices[i]; i++) 208 component_match_add(dev, &match, component_compare_dev_name, 209 devices[i]); 210 211 if (i == 0) { 212 dev_err(dev, "missing 'ports' property\n"); 213 return -ENODEV; 214 } 215 216 for (i = 0; devices[i]; i++) { 217 d = bus_find_device_by_name(&platform_bus_type, NULL, 218 devices[i]); 219 if (d && d->of_node) 220 armada_add_endpoints(dev, &match, d->of_node); 221 put_device(d); 222 } 223 } 224 225 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 226 match); 227 } 228 229 static void armada_drm_remove(struct platform_device *pdev) 230 { 231 component_master_del(&pdev->dev, &armada_master_ops); 232 } 233 234 static void armada_drm_shutdown(struct platform_device *pdev) 235 { 236 drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); 237 } 238 239 static const struct platform_device_id armada_drm_platform_ids[] = { 240 { 241 .name = "armada-drm", 242 }, { 243 .name = "armada-510-drm", 244 }, 245 { }, 246 }; 247 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 248 249 static struct platform_driver armada_drm_platform_driver = { 250 .probe = armada_drm_probe, 251 .remove_new = armada_drm_remove, 252 .shutdown = armada_drm_shutdown, 253 .driver = { 254 .name = "armada-drm", 255 }, 256 .id_table = armada_drm_platform_ids, 257 }; 258 259 static int __init armada_drm_init(void) 260 { 261 int ret; 262 263 if (drm_firmware_drivers_only()) 264 return -ENODEV; 265 266 ret = platform_driver_register(&armada_lcd_platform_driver); 267 if (ret) 268 return ret; 269 ret = platform_driver_register(&armada_drm_platform_driver); 270 if (ret) 271 platform_driver_unregister(&armada_lcd_platform_driver); 272 return ret; 273 } 274 module_init(armada_drm_init); 275 276 static void __exit armada_drm_exit(void) 277 { 278 platform_driver_unregister(&armada_drm_platform_driver); 279 platform_driver_unregister(&armada_lcd_platform_driver); 280 } 281 module_exit(armada_drm_exit); 282 283 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>"); 284 MODULE_DESCRIPTION("Armada DRM Driver"); 285 MODULE_LICENSE("GPL"); 286 MODULE_ALIAS("platform:armada-drm"); 287