1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved. 4 * Author: James.Qian.Wang <james.qian.wang@arm.com> 5 * 6 */ 7 #include <linux/module.h> 8 #include <linux/kernel.h> 9 #include <linux/platform_device.h> 10 #include <linux/component.h> 11 #include <linux/pm_runtime.h> 12 #include <drm/drm_of.h> 13 #include "komeda_dev.h" 14 #include "komeda_kms.h" 15 16 struct komeda_drv { 17 struct komeda_dev *mdev; 18 struct komeda_kms_dev *kms; 19 }; 20 21 struct komeda_dev *dev_to_mdev(struct device *dev) 22 { 23 struct komeda_drv *mdrv = dev_get_drvdata(dev); 24 25 return mdrv ? mdrv->mdev : NULL; 26 } 27 28 static void komeda_unbind(struct device *dev) 29 { 30 struct komeda_drv *mdrv = dev_get_drvdata(dev); 31 32 if (!mdrv) 33 return; 34 35 komeda_kms_detach(mdrv->kms); 36 37 if (pm_runtime_enabled(dev)) 38 pm_runtime_disable(dev); 39 else 40 komeda_dev_suspend(mdrv->mdev); 41 42 komeda_dev_destroy(mdrv->mdev); 43 44 dev_set_drvdata(dev, NULL); 45 devm_kfree(dev, mdrv); 46 } 47 48 static int komeda_bind(struct device *dev) 49 { 50 struct komeda_drv *mdrv; 51 int err; 52 53 mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL); 54 if (!mdrv) 55 return -ENOMEM; 56 57 mdrv->mdev = komeda_dev_create(dev); 58 if (IS_ERR(mdrv->mdev)) { 59 err = PTR_ERR(mdrv->mdev); 60 goto free_mdrv; 61 } 62 63 pm_runtime_enable(dev); 64 if (!pm_runtime_enabled(dev)) 65 komeda_dev_resume(mdrv->mdev); 66 67 mdrv->kms = komeda_kms_attach(mdrv->mdev); 68 if (IS_ERR(mdrv->kms)) { 69 err = PTR_ERR(mdrv->kms); 70 goto destroy_mdev; 71 } 72 73 dev_set_drvdata(dev, mdrv); 74 75 return 0; 76 77 destroy_mdev: 78 if (pm_runtime_enabled(dev)) 79 pm_runtime_disable(dev); 80 else 81 komeda_dev_suspend(mdrv->mdev); 82 83 komeda_dev_destroy(mdrv->mdev); 84 85 free_mdrv: 86 devm_kfree(dev, mdrv); 87 return err; 88 } 89 90 static const struct component_master_ops komeda_master_ops = { 91 .bind = komeda_bind, 92 .unbind = komeda_unbind, 93 }; 94 95 static int compare_of(struct device *dev, void *data) 96 { 97 return dev->of_node == data; 98 } 99 100 static void komeda_add_slave(struct device *master, 101 struct component_match **match, 102 struct device_node *np, 103 u32 port, u32 endpoint) 104 { 105 struct device_node *remote; 106 107 remote = of_graph_get_remote_node(np, port, endpoint); 108 if (remote) { 109 drm_of_component_match_add(master, match, compare_of, remote); 110 of_node_put(remote); 111 } 112 } 113 114 static int komeda_platform_probe(struct platform_device *pdev) 115 { 116 struct device *dev = &pdev->dev; 117 struct component_match *match = NULL; 118 struct device_node *child; 119 120 if (!dev->of_node) 121 return -ENODEV; 122 123 for_each_available_child_of_node(dev->of_node, child) { 124 if (of_node_cmp(child->name, "pipeline") != 0) 125 continue; 126 127 /* add connector */ 128 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 0); 129 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 1); 130 } 131 132 return component_master_add_with_match(dev, &komeda_master_ops, match); 133 } 134 135 static int komeda_platform_remove(struct platform_device *pdev) 136 { 137 component_master_del(&pdev->dev, &komeda_master_ops); 138 return 0; 139 } 140 141 static const struct of_device_id komeda_of_match[] = { 142 { .compatible = "arm,mali-d71", .data = d71_identify, }, 143 { .compatible = "arm,mali-d32", .data = d71_identify, }, 144 {}, 145 }; 146 147 MODULE_DEVICE_TABLE(of, komeda_of_match); 148 149 static int __maybe_unused komeda_rt_pm_suspend(struct device *dev) 150 { 151 struct komeda_drv *mdrv = dev_get_drvdata(dev); 152 153 return komeda_dev_suspend(mdrv->mdev); 154 } 155 156 static int __maybe_unused komeda_rt_pm_resume(struct device *dev) 157 { 158 struct komeda_drv *mdrv = dev_get_drvdata(dev); 159 160 return komeda_dev_resume(mdrv->mdev); 161 } 162 163 static int __maybe_unused komeda_pm_suspend(struct device *dev) 164 { 165 struct komeda_drv *mdrv = dev_get_drvdata(dev); 166 int res; 167 168 res = drm_mode_config_helper_suspend(&mdrv->kms->base); 169 170 if (!pm_runtime_status_suspended(dev)) 171 komeda_dev_suspend(mdrv->mdev); 172 173 return res; 174 } 175 176 static int __maybe_unused komeda_pm_resume(struct device *dev) 177 { 178 struct komeda_drv *mdrv = dev_get_drvdata(dev); 179 180 if (!pm_runtime_status_suspended(dev)) 181 komeda_dev_resume(mdrv->mdev); 182 183 return drm_mode_config_helper_resume(&mdrv->kms->base); 184 } 185 186 static const struct dev_pm_ops komeda_pm_ops = { 187 SET_SYSTEM_SLEEP_PM_OPS(komeda_pm_suspend, komeda_pm_resume) 188 SET_RUNTIME_PM_OPS(komeda_rt_pm_suspend, komeda_rt_pm_resume, NULL) 189 }; 190 191 static struct platform_driver komeda_platform_driver = { 192 .probe = komeda_platform_probe, 193 .remove = komeda_platform_remove, 194 .driver = { 195 .name = "komeda", 196 .of_match_table = komeda_of_match, 197 .pm = &komeda_pm_ops, 198 }, 199 }; 200 201 module_platform_driver(komeda_platform_driver); 202 203 MODULE_AUTHOR("James.Qian.Wang <james.qian.wang@arm.com>"); 204 MODULE_DESCRIPTION("Komeda KMS driver"); 205 MODULE_LICENSE("GPL v2"); 206