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_aperture.h> 13 #include <drm/drm_atomic_helper.h> 14 #include <drm/drm_drv.h> 15 #include <drm/drm_ioctl.h> 16 #include <drm/drm_managed.h> 17 #include <drm/drm_prime.h> 18 #include <drm/drm_probe_helper.h> 19 #include <drm/drm_fb_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 .lastclose = drm_fb_helper_lastclose, 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_import = armada_gem_prime_import, 44 .dumb_create = armada_gem_dumb_create, 45 .major = 1, 46 .minor = 0, 47 .name = "armada-drm", 48 .desc = "Armada SoC DRM", 49 .date = "20120730", 50 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 51 .ioctls = armada_ioctls, 52 .num_ioctls = ARRAY_SIZE(armada_ioctls), 53 .fops = &armada_drm_fops, 54 }; 55 56 static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = { 57 .fb_create = armada_fb_create, 58 .output_poll_changed = drm_fb_helper_output_poll_changed, 59 .atomic_check = drm_atomic_helper_check, 60 .atomic_commit = drm_atomic_helper_commit, 61 }; 62 63 static int armada_drm_bind(struct device *dev) 64 { 65 struct armada_private *priv; 66 struct resource *mem = NULL; 67 int ret, n; 68 69 for (n = 0; ; n++) { 70 struct resource *r = platform_get_resource(to_platform_device(dev), 71 IORESOURCE_MEM, n); 72 if (!r) 73 break; 74 75 /* Resources above 64K are graphics memory */ 76 if (resource_size(r) > SZ_64K) 77 mem = r; 78 else 79 return -EINVAL; 80 } 81 82 if (!mem) 83 return -ENXIO; 84 85 if (!devm_request_mem_region(dev, mem->start, resource_size(mem), 86 "armada-drm")) 87 return -EBUSY; 88 89 priv = devm_drm_dev_alloc(dev, &armada_drm_driver, 90 struct armada_private, drm); 91 if (IS_ERR(priv)) { 92 dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n", 93 __func__, PTR_ERR(priv)); 94 return PTR_ERR(priv); 95 } 96 97 /* Remove early framebuffers */ 98 ret = drm_aperture_remove_framebuffers(false, &armada_drm_driver); 99 if (ret) { 100 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n", 101 __func__, ret); 102 kfree(priv); 103 return ret; 104 } 105 106 dev_set_drvdata(dev, &priv->drm); 107 108 /* Mode setting support */ 109 drm_mode_config_init(&priv->drm); 110 priv->drm.mode_config.min_width = 320; 111 priv->drm.mode_config.min_height = 200; 112 113 /* 114 * With vscale enabled, the maximum width is 1920 due to the 115 * 1920 by 3 lines RAM 116 */ 117 priv->drm.mode_config.max_width = 1920; 118 priv->drm.mode_config.max_height = 2048; 119 120 priv->drm.mode_config.preferred_depth = 24; 121 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs; 122 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 123 mutex_init(&priv->linear_lock); 124 125 ret = component_bind_all(dev, &priv->drm); 126 if (ret) 127 goto err_kms; 128 129 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc); 130 if (ret) 131 goto err_comp; 132 133 drm_mode_config_reset(&priv->drm); 134 135 ret = armada_fbdev_init(&priv->drm); 136 if (ret) 137 goto err_comp; 138 139 drm_kms_helper_poll_init(&priv->drm); 140 141 ret = drm_dev_register(&priv->drm, 0); 142 if (ret) 143 goto err_poll; 144 145 #ifdef CONFIG_DEBUG_FS 146 armada_drm_debugfs_init(priv->drm.primary); 147 #endif 148 149 return 0; 150 151 err_poll: 152 drm_kms_helper_poll_fini(&priv->drm); 153 armada_fbdev_fini(&priv->drm); 154 err_comp: 155 component_unbind_all(dev, &priv->drm); 156 err_kms: 157 drm_mode_config_cleanup(&priv->drm); 158 drm_mm_takedown(&priv->linear); 159 return ret; 160 } 161 162 static void armada_drm_unbind(struct device *dev) 163 { 164 struct drm_device *drm = dev_get_drvdata(dev); 165 struct armada_private *priv = drm_to_armada_dev(drm); 166 167 drm_kms_helper_poll_fini(&priv->drm); 168 armada_fbdev_fini(&priv->drm); 169 170 drm_dev_unregister(&priv->drm); 171 172 drm_atomic_helper_shutdown(&priv->drm); 173 174 component_unbind_all(dev, &priv->drm); 175 176 drm_mode_config_cleanup(&priv->drm); 177 drm_mm_takedown(&priv->linear); 178 } 179 180 static int compare_of(struct device *dev, void *data) 181 { 182 return dev->of_node == data; 183 } 184 185 static int compare_dev_name(struct device *dev, void *data) 186 { 187 const char *name = data; 188 return !strcmp(dev_name(dev), name); 189 } 190 191 static void armada_add_endpoints(struct device *dev, 192 struct component_match **match, struct device_node *dev_node) 193 { 194 struct device_node *ep, *remote; 195 196 for_each_endpoint_of_node(dev_node, ep) { 197 remote = of_graph_get_remote_port_parent(ep); 198 if (remote && of_device_is_available(remote)) 199 drm_of_component_match_add(dev, match, compare_of, 200 remote); 201 of_node_put(remote); 202 } 203 } 204 205 static const struct component_master_ops armada_master_ops = { 206 .bind = armada_drm_bind, 207 .unbind = armada_drm_unbind, 208 }; 209 210 static int armada_drm_probe(struct platform_device *pdev) 211 { 212 struct component_match *match = NULL; 213 struct device *dev = &pdev->dev; 214 int ret; 215 216 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); 217 if (ret != -EINVAL) 218 return ret; 219 220 if (dev->platform_data) { 221 char **devices = dev->platform_data; 222 struct device *d; 223 int i; 224 225 for (i = 0; devices[i]; i++) 226 component_match_add(dev, &match, compare_dev_name, 227 devices[i]); 228 229 if (i == 0) { 230 dev_err(dev, "missing 'ports' property\n"); 231 return -ENODEV; 232 } 233 234 for (i = 0; devices[i]; i++) { 235 d = bus_find_device_by_name(&platform_bus_type, NULL, 236 devices[i]); 237 if (d && d->of_node) 238 armada_add_endpoints(dev, &match, d->of_node); 239 put_device(d); 240 } 241 } 242 243 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 244 match); 245 } 246 247 static int armada_drm_remove(struct platform_device *pdev) 248 { 249 component_master_del(&pdev->dev, &armada_master_ops); 250 return 0; 251 } 252 253 static const struct platform_device_id armada_drm_platform_ids[] = { 254 { 255 .name = "armada-drm", 256 }, { 257 .name = "armada-510-drm", 258 }, 259 { }, 260 }; 261 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 262 263 static struct platform_driver armada_drm_platform_driver = { 264 .probe = armada_drm_probe, 265 .remove = armada_drm_remove, 266 .driver = { 267 .name = "armada-drm", 268 }, 269 .id_table = armada_drm_platform_ids, 270 }; 271 272 static int __init armada_drm_init(void) 273 { 274 int ret; 275 276 if (drm_firmware_drivers_only()) 277 return -ENODEV; 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