1 /* 2 * Hisilicon Kirin SoCs drm master driver 3 * 4 * Copyright (c) 2016 Linaro Limited. 5 * Copyright (c) 2014-2016 Hisilicon Limited. 6 * 7 * Author: 8 * Xinliang Liu <z.liuxinliang@hisilicon.com> 9 * Xinliang Liu <xinliang.liu@linaro.org> 10 * Xinwei Kong <kong.kongxinwei@hisilicon.com> 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 * 16 */ 17 18 #include <linux/of_platform.h> 19 #include <linux/component.h> 20 #include <linux/of_graph.h> 21 22 #include <drm/drmP.h> 23 #include <drm/drm_gem_cma_helper.h> 24 #include <drm/drm_fb_cma_helper.h> 25 #include <drm/drm_atomic_helper.h> 26 #include <drm/drm_crtc_helper.h> 27 #include <drm/drm_of.h> 28 29 #include "kirin_drm_drv.h" 30 31 static struct kirin_dc_ops *dc_ops; 32 33 static int kirin_drm_kms_cleanup(struct drm_device *dev) 34 { 35 struct kirin_drm_private *priv = dev->dev_private; 36 37 #ifdef CONFIG_DRM_FBDEV_EMULATION 38 if (priv->fbdev) { 39 drm_fbdev_cma_fini(priv->fbdev); 40 priv->fbdev = NULL; 41 } 42 #endif 43 drm_kms_helper_poll_fini(dev); 44 drm_vblank_cleanup(dev); 45 dc_ops->cleanup(to_platform_device(dev->dev)); 46 drm_mode_config_cleanup(dev); 47 devm_kfree(dev->dev, priv); 48 dev->dev_private = NULL; 49 50 return 0; 51 } 52 53 #ifdef CONFIG_DRM_FBDEV_EMULATION 54 static void kirin_fbdev_output_poll_changed(struct drm_device *dev) 55 { 56 struct kirin_drm_private *priv = dev->dev_private; 57 58 if (priv->fbdev) { 59 drm_fbdev_cma_hotplug_event(priv->fbdev); 60 } else { 61 priv->fbdev = drm_fbdev_cma_init(dev, 32, 62 dev->mode_config.num_connector); 63 if (IS_ERR(priv->fbdev)) 64 priv->fbdev = NULL; 65 } 66 } 67 #endif 68 69 static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = { 70 .fb_create = drm_fb_cma_create, 71 #ifdef CONFIG_DRM_FBDEV_EMULATION 72 .output_poll_changed = kirin_fbdev_output_poll_changed, 73 #endif 74 .atomic_check = drm_atomic_helper_check, 75 .atomic_commit = drm_atomic_helper_commit, 76 }; 77 78 static void kirin_drm_mode_config_init(struct drm_device *dev) 79 { 80 dev->mode_config.min_width = 0; 81 dev->mode_config.min_height = 0; 82 83 dev->mode_config.max_width = 2048; 84 dev->mode_config.max_height = 2048; 85 86 dev->mode_config.funcs = &kirin_drm_mode_config_funcs; 87 } 88 89 static int kirin_drm_kms_init(struct drm_device *dev) 90 { 91 struct kirin_drm_private *priv; 92 int ret; 93 94 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL); 95 if (!priv) 96 return -ENOMEM; 97 98 dev->dev_private = priv; 99 dev_set_drvdata(dev->dev, dev); 100 101 /* dev->mode_config initialization */ 102 drm_mode_config_init(dev); 103 kirin_drm_mode_config_init(dev); 104 105 /* display controller init */ 106 ret = dc_ops->init(to_platform_device(dev->dev)); 107 if (ret) 108 goto err_mode_config_cleanup; 109 110 /* bind and init sub drivers */ 111 ret = component_bind_all(dev->dev, dev); 112 if (ret) { 113 DRM_ERROR("failed to bind all component.\n"); 114 goto err_dc_cleanup; 115 } 116 117 /* vblank init */ 118 ret = drm_vblank_init(dev, dev->mode_config.num_crtc); 119 if (ret) { 120 DRM_ERROR("failed to initialize vblank.\n"); 121 goto err_unbind_all; 122 } 123 /* with irq_enabled = true, we can use the vblank feature. */ 124 dev->irq_enabled = true; 125 126 /* reset all the states of crtc/plane/encoder/connector */ 127 drm_mode_config_reset(dev); 128 129 /* init kms poll for handling hpd */ 130 drm_kms_helper_poll_init(dev); 131 132 /* force detection after connectors init */ 133 (void)drm_helper_hpd_irq_event(dev); 134 135 return 0; 136 137 err_unbind_all: 138 component_unbind_all(dev->dev, dev); 139 err_dc_cleanup: 140 dc_ops->cleanup(to_platform_device(dev->dev)); 141 err_mode_config_cleanup: 142 drm_mode_config_cleanup(dev); 143 devm_kfree(dev->dev, priv); 144 dev->dev_private = NULL; 145 146 return ret; 147 } 148 149 DEFINE_DRM_GEM_CMA_FOPS(kirin_drm_fops); 150 151 static int kirin_gem_cma_dumb_create(struct drm_file *file, 152 struct drm_device *dev, 153 struct drm_mode_create_dumb *args) 154 { 155 return drm_gem_cma_dumb_create_internal(file, dev, args); 156 } 157 158 static struct drm_driver kirin_drm_driver = { 159 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | 160 DRIVER_ATOMIC, 161 .fops = &kirin_drm_fops, 162 163 .gem_free_object_unlocked = drm_gem_cma_free_object, 164 .gem_vm_ops = &drm_gem_cma_vm_ops, 165 .dumb_create = kirin_gem_cma_dumb_create, 166 .dumb_map_offset = drm_gem_cma_dumb_map_offset, 167 .dumb_destroy = drm_gem_dumb_destroy, 168 169 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 170 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 171 .gem_prime_export = drm_gem_prime_export, 172 .gem_prime_import = drm_gem_prime_import, 173 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 174 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 175 .gem_prime_vmap = drm_gem_cma_prime_vmap, 176 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 177 .gem_prime_mmap = drm_gem_cma_prime_mmap, 178 179 .name = "kirin", 180 .desc = "Hisilicon Kirin SoCs' DRM Driver", 181 .date = "20150718", 182 .major = 1, 183 .minor = 0, 184 }; 185 186 static int compare_of(struct device *dev, void *data) 187 { 188 return dev->of_node == data; 189 } 190 191 static int kirin_drm_bind(struct device *dev) 192 { 193 struct drm_driver *driver = &kirin_drm_driver; 194 struct drm_device *drm_dev; 195 int ret; 196 197 drm_dev = drm_dev_alloc(driver, dev); 198 if (IS_ERR(drm_dev)) 199 return PTR_ERR(drm_dev); 200 201 ret = kirin_drm_kms_init(drm_dev); 202 if (ret) 203 goto err_drm_dev_unref; 204 205 ret = drm_dev_register(drm_dev, 0); 206 if (ret) 207 goto err_kms_cleanup; 208 209 return 0; 210 211 err_kms_cleanup: 212 kirin_drm_kms_cleanup(drm_dev); 213 err_drm_dev_unref: 214 drm_dev_unref(drm_dev); 215 216 return ret; 217 } 218 219 static void kirin_drm_unbind(struct device *dev) 220 { 221 struct drm_device *drm_dev = dev_get_drvdata(dev); 222 223 drm_dev_unregister(drm_dev); 224 kirin_drm_kms_cleanup(drm_dev); 225 drm_dev_unref(drm_dev); 226 } 227 228 static const struct component_master_ops kirin_drm_ops = { 229 .bind = kirin_drm_bind, 230 .unbind = kirin_drm_unbind, 231 }; 232 233 static int kirin_drm_platform_probe(struct platform_device *pdev) 234 { 235 struct device *dev = &pdev->dev; 236 struct device_node *np = dev->of_node; 237 struct component_match *match = NULL; 238 struct device_node *remote; 239 240 dc_ops = (struct kirin_dc_ops *)of_device_get_match_data(dev); 241 if (!dc_ops) { 242 DRM_ERROR("failed to get dt id data\n"); 243 return -EINVAL; 244 } 245 246 remote = of_graph_get_remote_node(np, 0, 0); 247 if (IS_ERR(remote)) 248 return PTR_ERR(remote); 249 250 drm_of_component_match_add(dev, &match, compare_of, remote); 251 of_node_put(remote); 252 253 return component_master_add_with_match(dev, &kirin_drm_ops, match); 254 255 return 0; 256 } 257 258 static int kirin_drm_platform_remove(struct platform_device *pdev) 259 { 260 component_master_del(&pdev->dev, &kirin_drm_ops); 261 dc_ops = NULL; 262 return 0; 263 } 264 265 static const struct of_device_id kirin_drm_dt_ids[] = { 266 { .compatible = "hisilicon,hi6220-ade", 267 .data = &ade_dc_ops, 268 }, 269 { /* end node */ }, 270 }; 271 MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids); 272 273 static struct platform_driver kirin_drm_platform_driver = { 274 .probe = kirin_drm_platform_probe, 275 .remove = kirin_drm_platform_remove, 276 .driver = { 277 .name = "kirin-drm", 278 .of_match_table = kirin_drm_dt_ids, 279 }, 280 }; 281 282 module_platform_driver(kirin_drm_platform_driver); 283 284 MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>"); 285 MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>"); 286 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>"); 287 MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver"); 288 MODULE_LICENSE("GPL v2"); 289