1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright 2019 NXP. 4 */ 5 6 #include <linux/module.h> 7 #include <linux/kernel.h> 8 #include <linux/of.h> 9 #include <linux/platform_device.h> 10 #include <drm/drm_module.h> 11 #include <drm/drm_of.h> 12 13 #include "dcss-dev.h" 14 #include "dcss-kms.h" 15 16 struct dcss_drv { 17 struct dcss_dev *dcss; 18 struct dcss_kms_dev *kms; 19 }; 20 21 struct dcss_dev *dcss_drv_dev_to_dcss(struct device *dev) 22 { 23 struct dcss_drv *mdrv = dev_get_drvdata(dev); 24 25 return mdrv ? mdrv->dcss : NULL; 26 } 27 28 struct drm_device *dcss_drv_dev_to_drm(struct device *dev) 29 { 30 struct dcss_drv *mdrv = dev_get_drvdata(dev); 31 32 return mdrv ? &mdrv->kms->base : NULL; 33 } 34 35 static int dcss_drv_platform_probe(struct platform_device *pdev) 36 { 37 struct device *dev = &pdev->dev; 38 struct device_node *remote; 39 struct dcss_drv *mdrv; 40 int err = 0; 41 bool hdmi_output = true; 42 43 if (!dev->of_node) 44 return -ENODEV; 45 46 remote = of_graph_get_remote_node(dev->of_node, 0, 0); 47 if (!remote) 48 return -ENODEV; 49 50 hdmi_output = !of_device_is_compatible(remote, "fsl,imx8mq-nwl-dsi"); 51 52 of_node_put(remote); 53 54 mdrv = kzalloc(sizeof(*mdrv), GFP_KERNEL); 55 if (!mdrv) 56 return -ENOMEM; 57 58 mdrv->dcss = dcss_dev_create(dev, hdmi_output); 59 if (IS_ERR(mdrv->dcss)) { 60 err = PTR_ERR(mdrv->dcss); 61 goto err; 62 } 63 64 dev_set_drvdata(dev, mdrv); 65 66 mdrv->kms = dcss_kms_attach(mdrv->dcss); 67 if (IS_ERR(mdrv->kms)) { 68 err = PTR_ERR(mdrv->kms); 69 dev_err_probe(dev, err, "Failed to initialize KMS\n"); 70 goto dcss_shutoff; 71 } 72 73 return 0; 74 75 dcss_shutoff: 76 dcss_dev_destroy(mdrv->dcss); 77 78 err: 79 kfree(mdrv); 80 return err; 81 } 82 83 static void dcss_drv_platform_remove(struct platform_device *pdev) 84 { 85 struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev); 86 87 dcss_kms_detach(mdrv->kms); 88 dcss_dev_destroy(mdrv->dcss); 89 90 kfree(mdrv); 91 } 92 93 static void dcss_drv_platform_shutdown(struct platform_device *pdev) 94 { 95 struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev); 96 97 dcss_kms_shutdown(mdrv->kms); 98 } 99 100 static struct dcss_type_data dcss_types[] = { 101 [DCSS_IMX8MQ] = { 102 .name = "DCSS_IMX8MQ", 103 .blkctl_ofs = 0x2F000, 104 .ctxld_ofs = 0x23000, 105 .dtg_ofs = 0x20000, 106 .scaler_ofs = 0x1C000, 107 .ss_ofs = 0x1B000, 108 .dpr_ofs = 0x18000, 109 }, 110 }; 111 112 static const struct of_device_id dcss_of_match[] = { 113 { .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], }, 114 {}, 115 }; 116 117 MODULE_DEVICE_TABLE(of, dcss_of_match); 118 119 static struct platform_driver dcss_platform_driver = { 120 .probe = dcss_drv_platform_probe, 121 .remove_new = dcss_drv_platform_remove, 122 .shutdown = dcss_drv_platform_shutdown, 123 .driver = { 124 .name = "imx-dcss", 125 .of_match_table = dcss_of_match, 126 .pm = pm_ptr(&dcss_dev_pm_ops), 127 }, 128 }; 129 130 drm_module_platform_driver(dcss_platform_driver); 131 132 MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>"); 133 MODULE_DESCRIPTION("DCSS driver for i.MX8MQ"); 134 MODULE_LICENSE("GPL v2"); 135