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