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 komeda_dev_destroy(mdrv->mdev); 37 38 dev_set_drvdata(dev, NULL); 39 devm_kfree(dev, mdrv); 40 } 41 42 static int komeda_bind(struct device *dev) 43 { 44 struct komeda_drv *mdrv; 45 int err; 46 47 mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL); 48 if (!mdrv) 49 return -ENOMEM; 50 51 mdrv->mdev = komeda_dev_create(dev); 52 if (IS_ERR(mdrv->mdev)) { 53 err = PTR_ERR(mdrv->mdev); 54 goto free_mdrv; 55 } 56 57 mdrv->kms = komeda_kms_attach(mdrv->mdev); 58 if (IS_ERR(mdrv->kms)) { 59 err = PTR_ERR(mdrv->kms); 60 goto destroy_mdev; 61 } 62 63 dev_set_drvdata(dev, mdrv); 64 65 return 0; 66 67 destroy_mdev: 68 komeda_dev_destroy(mdrv->mdev); 69 70 free_mdrv: 71 devm_kfree(dev, mdrv); 72 return err; 73 } 74 75 static const struct component_master_ops komeda_master_ops = { 76 .bind = komeda_bind, 77 .unbind = komeda_unbind, 78 }; 79 80 static int compare_of(struct device *dev, void *data) 81 { 82 return dev->of_node == data; 83 } 84 85 static void komeda_add_slave(struct device *master, 86 struct component_match **match, 87 struct device_node *np, 88 u32 port, u32 endpoint) 89 { 90 struct device_node *remote; 91 92 remote = of_graph_get_remote_node(np, port, endpoint); 93 if (remote) { 94 drm_of_component_match_add(master, match, compare_of, remote); 95 of_node_put(remote); 96 } 97 } 98 99 static int komeda_platform_probe(struct platform_device *pdev) 100 { 101 struct device *dev = &pdev->dev; 102 struct component_match *match = NULL; 103 struct device_node *child; 104 105 if (!dev->of_node) 106 return -ENODEV; 107 108 for_each_available_child_of_node(dev->of_node, child) { 109 if (of_node_cmp(child->name, "pipeline") != 0) 110 continue; 111 112 /* add connector */ 113 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 0); 114 komeda_add_slave(dev, &match, child, KOMEDA_OF_PORT_OUTPUT, 1); 115 } 116 117 return component_master_add_with_match(dev, &komeda_master_ops, match); 118 } 119 120 static int komeda_platform_remove(struct platform_device *pdev) 121 { 122 component_master_del(&pdev->dev, &komeda_master_ops); 123 return 0; 124 } 125 126 static const struct komeda_product_data komeda_products[] = { 127 [MALI_D71] = { 128 .product_id = MALIDP_D71_PRODUCT_ID, 129 .identify = d71_identify, 130 }, 131 }; 132 133 static const struct of_device_id komeda_of_match[] = { 134 { .compatible = "arm,mali-d71", .data = &komeda_products[MALI_D71], }, 135 {}, 136 }; 137 138 MODULE_DEVICE_TABLE(of, komeda_of_match); 139 140 static int __maybe_unused komeda_pm_suspend(struct device *dev) 141 { 142 struct komeda_drv *mdrv = dev_get_drvdata(dev); 143 struct drm_device *drm = &mdrv->kms->base; 144 int res; 145 146 res = drm_mode_config_helper_suspend(drm); 147 148 komeda_dev_suspend(mdrv->mdev); 149 150 return res; 151 } 152 153 static int __maybe_unused komeda_pm_resume(struct device *dev) 154 { 155 struct komeda_drv *mdrv = dev_get_drvdata(dev); 156 struct drm_device *drm = &mdrv->kms->base; 157 158 komeda_dev_resume(mdrv->mdev); 159 160 return drm_mode_config_helper_resume(drm); 161 } 162 163 static const struct dev_pm_ops komeda_pm_ops = { 164 SET_SYSTEM_SLEEP_PM_OPS(komeda_pm_suspend, komeda_pm_resume) 165 }; 166 167 static struct platform_driver komeda_platform_driver = { 168 .probe = komeda_platform_probe, 169 .remove = komeda_platform_remove, 170 .driver = { 171 .name = "komeda", 172 .of_match_table = komeda_of_match, 173 .pm = &komeda_pm_ops, 174 }, 175 }; 176 177 module_platform_driver(komeda_platform_driver); 178 179 MODULE_AUTHOR("James.Qian.Wang <james.qian.wang@arm.com>"); 180 MODULE_DESCRIPTION("Komeda KMS driver"); 181 MODULE_LICENSE("GPL v2"); 182