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 return ret; 103 } 104 105 dev_set_drvdata(dev, &priv->drm); 106 107 /* Mode setting support */ 108 drm_mode_config_init(&priv->drm); 109 priv->drm.mode_config.min_width = 320; 110 priv->drm.mode_config.min_height = 200; 111 112 /* 113 * With vscale enabled, the maximum width is 1920 due to the 114 * 1920 by 3 lines RAM 115 */ 116 priv->drm.mode_config.max_width = 1920; 117 priv->drm.mode_config.max_height = 2048; 118 119 priv->drm.mode_config.preferred_depth = 24; 120 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs; 121 drm_mm_init(&priv->linear, mem->start, resource_size(mem)); 122 mutex_init(&priv->linear_lock); 123 124 ret = component_bind_all(dev, &priv->drm); 125 if (ret) 126 goto err_kms; 127 128 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc); 129 if (ret) 130 goto err_comp; 131 132 drm_mode_config_reset(&priv->drm); 133 134 ret = armada_fbdev_init(&priv->drm); 135 if (ret) 136 goto err_comp; 137 138 drm_kms_helper_poll_init(&priv->drm); 139 140 ret = drm_dev_register(&priv->drm, 0); 141 if (ret) 142 goto err_poll; 143 144 #ifdef CONFIG_DEBUG_FS 145 armada_drm_debugfs_init(priv->drm.primary); 146 #endif 147 148 return 0; 149 150 err_poll: 151 drm_kms_helper_poll_fini(&priv->drm); 152 armada_fbdev_fini(&priv->drm); 153 err_comp: 154 component_unbind_all(dev, &priv->drm); 155 err_kms: 156 drm_mode_config_cleanup(&priv->drm); 157 drm_mm_takedown(&priv->linear); 158 return ret; 159 } 160 161 static void armada_drm_unbind(struct device *dev) 162 { 163 struct drm_device *drm = dev_get_drvdata(dev); 164 struct armada_private *priv = drm_to_armada_dev(drm); 165 166 drm_kms_helper_poll_fini(&priv->drm); 167 armada_fbdev_fini(&priv->drm); 168 169 drm_dev_unregister(&priv->drm); 170 171 drm_atomic_helper_shutdown(&priv->drm); 172 173 component_unbind_all(dev, &priv->drm); 174 175 drm_mode_config_cleanup(&priv->drm); 176 drm_mm_takedown(&priv->linear); 177 } 178 179 static void armada_add_endpoints(struct device *dev, 180 struct component_match **match, struct device_node *dev_node) 181 { 182 struct device_node *ep, *remote; 183 184 for_each_endpoint_of_node(dev_node, ep) { 185 remote = of_graph_get_remote_port_parent(ep); 186 if (remote && of_device_is_available(remote)) 187 drm_of_component_match_add(dev, match, component_compare_of, 188 remote); 189 of_node_put(remote); 190 } 191 } 192 193 static const struct component_master_ops armada_master_ops = { 194 .bind = armada_drm_bind, 195 .unbind = armada_drm_unbind, 196 }; 197 198 static int armada_drm_probe(struct platform_device *pdev) 199 { 200 struct component_match *match = NULL; 201 struct device *dev = &pdev->dev; 202 int ret; 203 204 ret = drm_of_component_probe(dev, component_compare_dev_name, &armada_master_ops); 205 if (ret != -EINVAL) 206 return ret; 207 208 if (dev->platform_data) { 209 char **devices = dev->platform_data; 210 struct device *d; 211 int i; 212 213 for (i = 0; devices[i]; i++) 214 component_match_add(dev, &match, component_compare_dev_name, 215 devices[i]); 216 217 if (i == 0) { 218 dev_err(dev, "missing 'ports' property\n"); 219 return -ENODEV; 220 } 221 222 for (i = 0; devices[i]; i++) { 223 d = bus_find_device_by_name(&platform_bus_type, NULL, 224 devices[i]); 225 if (d && d->of_node) 226 armada_add_endpoints(dev, &match, d->of_node); 227 put_device(d); 228 } 229 } 230 231 return component_master_add_with_match(&pdev->dev, &armada_master_ops, 232 match); 233 } 234 235 static int armada_drm_remove(struct platform_device *pdev) 236 { 237 component_master_del(&pdev->dev, &armada_master_ops); 238 return 0; 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 = armada_drm_remove, 254 .driver = { 255 .name = "armada-drm", 256 }, 257 .id_table = armada_drm_platform_ids, 258 }; 259 260 static int __init armada_drm_init(void) 261 { 262 int ret; 263 264 if (drm_firmware_drivers_only()) 265 return -ENODEV; 266 267 ret = platform_driver_register(&armada_lcd_platform_driver); 268 if (ret) 269 return ret; 270 ret = platform_driver_register(&armada_drm_platform_driver); 271 if (ret) 272 platform_driver_unregister(&armada_lcd_platform_driver); 273 return ret; 274 } 275 module_init(armada_drm_init); 276 277 static void __exit armada_drm_exit(void) 278 { 279 platform_driver_unregister(&armada_drm_platform_driver); 280 platform_driver_unregister(&armada_lcd_platform_driver); 281 } 282 module_exit(armada_drm_exit); 283 284 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>"); 285 MODULE_DESCRIPTION("Armada DRM Driver"); 286 MODULE_LICENSE("GPL"); 287 MODULE_ALIAS("platform:armada-drm"); 288