1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * V4L2 Media Controller Driver for Freescale i.MX5/6 SOC
4 *
5 * Copyright (c) 2016-2019 Mentor Graphics Inc.
6 */
7 #include <linux/fs.h>
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include <media/v4l2-async.h>
11 #include <media/v4l2-event.h>
12 #include <media/imx.h>
13 #include "imx-media.h"
14
notifier2dev(struct v4l2_async_notifier * n)15 static inline struct imx_media_dev *notifier2dev(struct v4l2_async_notifier *n)
16 {
17 return container_of(n, struct imx_media_dev, notifier);
18 }
19
20 /* async subdev bound notifier */
imx_media_subdev_bound(struct v4l2_async_notifier * notifier,struct v4l2_subdev * sd,struct v4l2_async_connection * asd)21 static int imx_media_subdev_bound(struct v4l2_async_notifier *notifier,
22 struct v4l2_subdev *sd,
23 struct v4l2_async_connection *asd)
24 {
25 struct imx_media_dev *imxmd = notifier2dev(notifier);
26 int ret;
27
28 if (sd->grp_id & IMX_MEDIA_GRP_ID_IPU_CSI) {
29 /* register the IPU internal subdevs */
30 ret = imx_media_register_ipu_internal_subdevs(imxmd, sd);
31 if (ret)
32 return ret;
33 }
34
35 dev_dbg(imxmd->md.dev, "subdev %s bound\n", sd->name);
36
37 return 0;
38 }
39
40 /* async subdev complete notifier */
imx6_media_probe_complete(struct v4l2_async_notifier * notifier)41 static int imx6_media_probe_complete(struct v4l2_async_notifier *notifier)
42 {
43 struct imx_media_dev *imxmd = notifier2dev(notifier);
44 int ret;
45
46 /* call the imx5/6/7 common probe completion handler */
47 ret = imx_media_probe_complete(notifier);
48 if (ret)
49 return ret;
50
51 mutex_lock(&imxmd->mutex);
52
53 imxmd->m2m_vdev = imx_media_csc_scaler_device_init(imxmd);
54 if (IS_ERR(imxmd->m2m_vdev)) {
55 ret = PTR_ERR(imxmd->m2m_vdev);
56 imxmd->m2m_vdev = NULL;
57 goto unlock;
58 }
59
60 ret = imx_media_csc_scaler_device_register(imxmd->m2m_vdev);
61 unlock:
62 mutex_unlock(&imxmd->mutex);
63 return ret;
64 }
65
66 /* async subdev complete notifier */
67 static const struct v4l2_async_notifier_operations imx_media_notifier_ops = {
68 .bound = imx_media_subdev_bound,
69 .complete = imx6_media_probe_complete,
70 };
71
imx_media_probe(struct platform_device * pdev)72 static int imx_media_probe(struct platform_device *pdev)
73 {
74 struct device *dev = &pdev->dev;
75 struct device_node *node = dev->of_node;
76 struct imx_media_dev *imxmd;
77 int ret;
78
79 imxmd = imx_media_dev_init(dev, NULL);
80 if (IS_ERR(imxmd))
81 return PTR_ERR(imxmd);
82
83 ret = imx_media_add_of_subdevs(imxmd, node);
84 if (ret) {
85 v4l2_err(&imxmd->v4l2_dev,
86 "add_of_subdevs failed with %d\n", ret);
87 goto cleanup;
88 }
89
90 ret = imx_media_dev_notifier_register(imxmd, &imx_media_notifier_ops);
91 if (ret)
92 goto cleanup;
93
94 return 0;
95
96 cleanup:
97 v4l2_async_nf_cleanup(&imxmd->notifier);
98 v4l2_device_unregister(&imxmd->v4l2_dev);
99 media_device_cleanup(&imxmd->md);
100
101 return ret;
102 }
103
imx_media_remove(struct platform_device * pdev)104 static void imx_media_remove(struct platform_device *pdev)
105 {
106 struct imx_media_dev *imxmd =
107 (struct imx_media_dev *)platform_get_drvdata(pdev);
108
109 v4l2_info(&imxmd->v4l2_dev, "Removing imx-media\n");
110
111 if (imxmd->m2m_vdev) {
112 imx_media_csc_scaler_device_unregister(imxmd->m2m_vdev);
113 imxmd->m2m_vdev = NULL;
114 }
115
116 v4l2_async_nf_unregister(&imxmd->notifier);
117 imx_media_unregister_ipu_internal_subdevs(imxmd);
118 v4l2_async_nf_cleanup(&imxmd->notifier);
119 media_device_unregister(&imxmd->md);
120 v4l2_device_unregister(&imxmd->v4l2_dev);
121 media_device_cleanup(&imxmd->md);
122 }
123
124 static const struct of_device_id imx_media_dt_ids[] = {
125 { .compatible = "fsl,imx-capture-subsystem" },
126 { /* sentinel */ }
127 };
128 MODULE_DEVICE_TABLE(of, imx_media_dt_ids);
129
130 static struct platform_driver imx_media_pdrv = {
131 .probe = imx_media_probe,
132 .remove_new = imx_media_remove,
133 .driver = {
134 .name = "imx-media",
135 .of_match_table = imx_media_dt_ids,
136 },
137 };
138
139 module_platform_driver(imx_media_pdrv);
140
141 MODULE_DESCRIPTION("i.MX5/6 v4l2 media controller driver");
142 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>");
143 MODULE_LICENSE("GPL");
144
