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-fb"); 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 priv->drm.irq_enabled = true; 134 135 drm_mode_config_reset(&priv->drm); 136 137 ret = armada_fbdev_init(&priv->drm); 138 if (ret) 139 goto err_comp; 140 141 drm_kms_helper_poll_init(&priv->drm); 142 143 ret = drm_dev_register(&priv->drm, 0); 144 if (ret) 145 goto err_poll; 146 147 #ifdef CONFIG_DEBUG_FS 148 armada_drm_debugfs_init(priv->drm.primary); 149 #endif 150 151 return 0; 152 153 err_poll: 154 drm_kms_helper_poll_fini(&priv->drm); 155 armada_fbdev_fini(&priv->drm); 156 err_comp: 157 component_unbind_all(dev, &priv->drm); 158 err_kms: 159 drm_mode_config_cleanup(&priv->drm); 160 drm_mm_takedown(&priv->linear); 161 return ret; 162 } 163 164 static void armada_drm_unbind(struct device *dev) 165 { 166 struct drm_device *drm = dev_get_drvdata(dev); 167 struct armada_private *priv = drm_to_armada_dev(drm); 168 169 drm_kms_helper_poll_fini(&priv->drm); 170 armada_fbdev_fini(&priv->drm); 171 172 drm_dev_unregister(&priv->drm); 173 174 drm_atomic_helper_shutdown(&priv->drm); 175 176 component_unbind_all(dev, &priv->drm); 177 178 drm_mode_config_cleanup(&priv->drm); 179 drm_mm_takedown(&priv->linear); 180 } 181 182 static int compare_of(struct device *dev, void *data) 183 { 184 return dev->of_node == data; 185 } 186 187 static int compare_dev_name(struct device *dev, void *data) 188 { 189 const char *name = data; 190 return !strcmp(dev_name(dev), name); 191 } 192 193 static void armada_add_endpoints(struct device *dev, 194 struct component_match **match, struct device_node *dev_node) 195 { 196 struct device_node *ep, *remote; 197 198 for_each_endpoint_of_node(dev_node, ep) { 199 remote = of_graph_get_remote_port_parent(ep); 200 if (remote && of_device_is_available(remote)) 201 drm_of_component_match_add(dev, match, compare_of, 202 remote); 203 of_node_put(remote); 204 } 205 } 206 207 static const struct component_master_ops armada_master_ops = { 208 .bind = armada_drm_bind, 209 .unbind = armada_drm_unbind, 210 }; 211 212 static int armada_drm_probe(struct platform_device *pdev) 213 { 214 struct component_match *match = NULL; 215 struct device *dev = &pdev->dev; 216 int ret; 217 218 ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); 219 if (ret != -EINVAL) 220 return ret; 221 222 if (dev->platform_data) { 223 char **devices = dev->platform_data; 224 struct device *d; 225 int i; 226 227 for (i = 0; devices[i]; i++) 228 component_match_add(dev, &match, compare_dev_name, 229 devices[i]); 230 231 if (i == 0) { 232 dev_err(dev, "missing 'ports' property\n"); 233 return -ENODEV; 234 } 235 236 for (i = 0; devices[i]; i++) { 237 d = bus_find_device_by_name(&platform_bus_type, NULL, 238 devices[i]); 239 if (d && d->of_node) 240 armada_add_endpoints(dev, &match, d->of_node); 241 put_device(d); 242 } 243 } 244 245 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 246 match); 247 } 248 249 static int armada_drm_remove(struct platform_device *pdev) 250 { 251 component_master_del(&pdev->dev, &armada_master_ops); 252 return 0; 253 } 254 255 static const struct platform_device_id armada_drm_platform_ids[] = { 256 { 257 .name = "armada-drm", 258 }, { 259 .name = "armada-510-drm", 260 }, 261 { }, 262 }; 263 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 264 265 static struct platform_driver armada_drm_platform_driver = { 266 .probe = armada_drm_probe, 267 .remove = armada_drm_remove, 268 .driver = { 269 .name = "armada-drm", 270 }, 271 .id_table = armada_drm_platform_ids, 272 }; 273 274 static int __init armada_drm_init(void) 275 { 276 int ret; 277 278 ret = platform_driver_register(&armada_lcd_platform_driver); 279 if (ret) 280 return ret; 281 ret = platform_driver_register(&armada_drm_platform_driver); 282 if (ret) 283 platform_driver_unregister(&armada_lcd_platform_driver); 284 return ret; 285 } 286 module_init(armada_drm_init); 287 288 static void __exit armada_drm_exit(void) 289 { 290 platform_driver_unregister(&armada_drm_platform_driver); 291 platform_driver_unregister(&armada_lcd_platform_driver); 292 } 293 module_exit(armada_drm_exit); 294 295 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>"); 296 MODULE_DESCRIPTION("Armada DRM Driver"); 297 MODULE_LICENSE("GPL"); 298 MODULE_ALIAS("platform:armada-drm"); 299