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 .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 .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 = drm_aperture_remove_framebuffers(&armada_drm_driver); 97 if (ret) { 98 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n", 99 __func__, ret); 100 kfree(priv); 101 return ret; 102 } 103 104 dev_set_drvdata(dev, &priv->drm); 105 106 /* Mode setting support */ 107 drm_mode_config_init(&priv->drm); 108 priv->drm.mode_config.min_width = 320; 109 priv->drm.mode_config.min_height = 200; 110 111 /* 112 * With vscale enabled, the maximum width is 1920 due to the 113 * 1920 by 3 lines RAM 114 */ 115 priv->drm.mode_config.max_width = 1920; 116 priv->drm.mode_config.max_height = 2048; 117 118 priv->drm.mode_config.preferred_depth = 24; 119 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs; 120 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 121 mutex_init(&priv->linear_lock); 122 123 ret = component_bind_all(dev, &priv->drm); 124 if (ret) 125 goto err_kms; 126 127 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc); 128 if (ret) 129 goto err_comp; 130 131 drm_mode_config_reset(&priv->drm); 132 133 drm_kms_helper_poll_init(&priv->drm); 134 135 ret = drm_dev_register(&priv->drm, 0); 136 if (ret) 137 goto err_poll; 138 139 #ifdef CONFIG_DEBUG_FS 140 armada_drm_debugfs_init(priv->drm.primary); 141 #endif 142 143 armada_fbdev_setup(&priv->drm); 144 145 return 0; 146 147 err_poll: 148 drm_kms_helper_poll_fini(&priv->drm); 149 err_comp: 150 component_unbind_all(dev, &priv->drm); 151 err_kms: 152 drm_mode_config_cleanup(&priv->drm); 153 drm_mm_takedown(&priv->linear); 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 } 173 174 static void armada_add_endpoints(struct device *dev, 175 struct component_match **match, struct device_node *dev_node) 176 { 177 struct device_node *ep, *remote; 178 179 for_each_endpoint_of_node(dev_node, ep) { 180 remote = of_graph_get_remote_port_parent(ep); 181 if (remote && of_device_is_available(remote)) 182 drm_of_component_match_add(dev, match, component_compare_of, 183 remote); 184 of_node_put(remote); 185 } 186 } 187 188 static const struct component_master_ops armada_master_ops = { 189 .bind = armada_drm_bind, 190 .unbind = armada_drm_unbind, 191 }; 192 193 static int armada_drm_probe(struct platform_device *pdev) 194 { 195 struct component_match *match = NULL; 196 struct device *dev = &pdev->dev; 197 int ret; 198 199 ret = drm_of_component_probe(dev, component_compare_dev_name, &armada_master_ops); 200 if (ret != -EINVAL) 201 return ret; 202 203 if (dev->platform_data) { 204 char **devices = dev->platform_data; 205 struct device *d; 206 int i; 207 208 for (i = 0; devices[i]; i++) 209 component_match_add(dev, &match, component_compare_dev_name, 210 devices[i]); 211 212 if (i == 0) { 213 dev_err(dev, "missing 'ports' property\n"); 214 return -ENODEV; 215 } 216 217 for (i = 0; devices[i]; i++) { 218 d = bus_find_device_by_name(&platform_bus_type, NULL, 219 devices[i]); 220 if (d && d->of_node) 221 armada_add_endpoints(dev, &match, d->of_node); 222 put_device(d); 223 } 224 } 225 226 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 227 match); 228 } 229 230 static int armada_drm_remove(struct platform_device *pdev) 231 { 232 component_master_del(&pdev->dev, &armada_master_ops); 233 return 0; 234 } 235 236 static const struct platform_device_id armada_drm_platform_ids[] = { 237 { 238 .name = "armada-drm", 239 }, { 240 .name = "armada-510-drm", 241 }, 242 { }, 243 }; 244 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); 245 246 static struct platform_driver armada_drm_platform_driver = { 247 .probe = armada_drm_probe, 248 .remove = armada_drm_remove, 249 .driver = { 250 .name = "armada-drm", 251 }, 252 .id_table = armada_drm_platform_ids, 253 }; 254 255 static int __init armada_drm_init(void) 256 { 257 int ret; 258 259 if (drm_firmware_drivers_only()) 260 return -ENODEV; 261 262 ret = platform_driver_register(&armada_lcd_platform_driver); 263 if (ret) 264 return ret; 265 ret = platform_driver_register(&armada_drm_platform_driver); 266 if (ret) 267 platform_driver_unregister(&armada_lcd_platform_driver); 268 return ret; 269 } 270 module_init(armada_drm_init); 271 272 static void __exit armada_drm_exit(void) 273 { 274 platform_driver_unregister(&armada_drm_platform_driver); 275 platform_driver_unregister(&armada_lcd_platform_driver); 276 } 277 module_exit(armada_drm_exit); 278 279 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>"); 280 MODULE_DESCRIPTION("Armada DRM Driver"); 281 MODULE_LICENSE("GPL"); 282 MODULE_ALIAS("platform:armada-drm"); 283