imx/dcss/dcss-drv.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Copyright 2019 NXP.
0004  */
0005
0006 #include <linux/module.h>
0007 #include <linux/kernel.h>
0008 #include <linux/of.h>
0009 #include <linux/platform_device.h>
0010 #include <drm/drm_module.h>
0011 #include <drm/drm_of.h>
0012
0013 #include "dcss-dev.h"
0014 #include "dcss-kms.h"
0015
0016 struct dcss_drv {
0017     struct dcss_dev *dcss;
0018     struct dcss_kms_dev *kms;
0019 };
0020
0021 struct dcss_dev *dcss_drv_dev_to_dcss(struct device *dev)
0022 {
0023     struct dcss_drv *mdrv = dev_get_drvdata(dev);
0024
0025     return mdrv ? mdrv->dcss : NULL;
0026 }
0027
0028 struct drm_device *dcss_drv_dev_to_drm(struct device *dev)
0029 {
0030     struct dcss_drv *mdrv = dev_get_drvdata(dev);
0031
0032     return mdrv ? &mdrv->kms->base : NULL;
0033 }
0034
0035 static int dcss_drv_platform_probe(struct platform_device *pdev)
0036 {
0037     struct device *dev = &pdev->dev;
0038     struct device_node *remote;
0039     struct dcss_drv *mdrv;
0040     int err = 0;
0041     bool hdmi_output = true;
0042
0043     if (!dev->of_node)
0044         return -ENODEV;
0045
0046     remote = of_graph_get_remote_node(dev->of_node, 0, 0);
0047     if (!remote)
0048         return -ENODEV;
0049
0050     hdmi_output = !of_device_is_compatible(remote, "fsl,imx8mq-nwl-dsi");
0051
0052     of_node_put(remote);
0053
0054     mdrv = kzalloc(sizeof(*mdrv), GFP_KERNEL);
0055     if (!mdrv)
0056         return -ENOMEM;
0057
0058     mdrv->dcss = dcss_dev_create(dev, hdmi_output);
0059     if (IS_ERR(mdrv->dcss)) {
0060         err = PTR_ERR(mdrv->dcss);
0061         goto err;
0062     }
0063
0064     dev_set_drvdata(dev, mdrv);
0065
0066     mdrv->kms = dcss_kms_attach(mdrv->dcss);
0067     if (IS_ERR(mdrv->kms)) {
0068         err = PTR_ERR(mdrv->kms);
0069         goto dcss_shutoff;
0070     }
0071
0072     return 0;
0073
0074 dcss_shutoff:
0075     dcss_dev_destroy(mdrv->dcss);
0076
0077     dev_set_drvdata(dev, NULL);
0078
0079 err:
0080     kfree(mdrv);
0081     return err;
0082 }
0083
0084 static int dcss_drv_platform_remove(struct platform_device *pdev)
0085 {
0086     struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev);
0087
0088     if (!mdrv)
0089         return 0;
0090
0091     dcss_kms_detach(mdrv->kms);
0092     dcss_dev_destroy(mdrv->dcss);
0093
0094     dev_set_drvdata(&pdev->dev, NULL);
0095
0096     kfree(mdrv);
0097
0098     return 0;
0099 }
0100
0101 static struct dcss_type_data dcss_types[] = {
0102     [DCSS_IMX8MQ] = {
0103         .name = "DCSS_IMX8MQ",
0104         .blkctl_ofs = 0x2F000,
0105         .ctxld_ofs = 0x23000,
0106         .dtg_ofs = 0x20000,
0107         .scaler_ofs = 0x1C000,
0108         .ss_ofs = 0x1B000,
0109         .dpr_ofs = 0x18000,
0110     },
0111 };
0112
0113 static const struct of_device_id dcss_of_match[] = {
0114     { .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], },
0115     {},
0116 };
0117
0118 MODULE_DEVICE_TABLE(of, dcss_of_match);
0119
0120 static const struct dev_pm_ops dcss_dev_pm = {
0121     SET_SYSTEM_SLEEP_PM_OPS(dcss_dev_suspend, dcss_dev_resume)
0122     SET_RUNTIME_PM_OPS(dcss_dev_runtime_suspend,
0123                dcss_dev_runtime_resume, NULL)
0124 };
0125
0126 static struct platform_driver dcss_platform_driver = {
0127     .probe  = dcss_drv_platform_probe,
0128     .remove = dcss_drv_platform_remove,
0129     .driver = {
0130         .name = "imx-dcss",
0131         .of_match_table = dcss_of_match,
0132         .pm = &dcss_dev_pm,
0133     },
0134 };
0135
0136 drm_module_platform_driver(dcss_platform_driver);
0137
0138 MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>");
0139 MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
0140 MODULE_LICENSE("GPL v2");