imx-ic-common.c

 1// SPDX-License-Identifier: GPL-2.0+
 2/*
 3 * V4L2 Image Converter Subdev for Freescale i.MX5/6 SOC
 4 *
 5 * Copyright (c) 2014-2016 Mentor Graphics Inc.
 6 */
 7#include <media/v4l2-device.h>
 8#include <media/v4l2-subdev.h>
 9#include "imx-media.h"
10#include "imx-ic.h"
11
12#define IC_TASK_PRP IC_NUM_TASKS
13#define IC_NUM_OPS  (IC_NUM_TASKS + 1)
14
15static struct imx_ic_ops *ic_ops[IC_NUM_OPS] = {
16	[IC_TASK_PRP]            = &imx_ic_prp_ops,
17	[IC_TASK_ENCODER]        = &imx_ic_prpencvf_ops,
18	[IC_TASK_VIEWFINDER]     = &imx_ic_prpencvf_ops,
19};
20
21struct v4l2_subdev *imx_media_ic_register(struct v4l2_device *v4l2_dev,
22					  struct device *ipu_dev,
23					  struct ipu_soc *ipu,
24					  u32 grp_id)
25{
26	struct imx_ic_priv *priv;
27	int ret;
28
29	priv = devm_kzalloc(ipu_dev, sizeof(*priv), GFP_KERNEL);
30	if (!priv)
31		return ERR_PTR(-ENOMEM);
32
33	priv->ipu_dev = ipu_dev;
34	priv->ipu = ipu;
35
36	/* get our IC task id */
37	switch (grp_id) {
38	case IMX_MEDIA_GRP_ID_IPU_IC_PRP:
39		priv->task_id = IC_TASK_PRP;
40		break;
41	case IMX_MEDIA_GRP_ID_IPU_IC_PRPENC:
42		priv->task_id = IC_TASK_ENCODER;
43		break;
44	case IMX_MEDIA_GRP_ID_IPU_IC_PRPVF:
45		priv->task_id = IC_TASK_VIEWFINDER;
46		break;
47	default:
48		return ERR_PTR(-EINVAL);
49	}
50
51	v4l2_subdev_init(&priv->sd, ic_ops[priv->task_id]->subdev_ops);
52	v4l2_set_subdevdata(&priv->sd, priv);
53	priv->sd.internal_ops = ic_ops[priv->task_id]->internal_ops;
54	priv->sd.entity.ops = ic_ops[priv->task_id]->entity_ops;
55	priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
56	priv->sd.owner = ipu_dev->driver->owner;
57	priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
58	priv->sd.grp_id = grp_id;
59	imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name),
60				    priv->sd.grp_id, ipu_get_num(ipu));
61
62	ret = ic_ops[priv->task_id]->init(priv);
63	if (ret)
64		return ERR_PTR(ret);
65
66	ret = v4l2_device_register_subdev(v4l2_dev, &priv->sd);
67	if (ret) {
68		ic_ops[priv->task_id]->remove(priv);
69		return ERR_PTR(ret);
70	}
71
72	return &priv->sd;
73}
74
75int imx_media_ic_unregister(struct v4l2_subdev *sd)
76{
77	struct imx_ic_priv *priv = container_of(sd, struct imx_ic_priv, sd);
78
79	v4l2_info(sd, "Removing\n");
80
81	ic_ops[priv->task_id]->remove(priv);
82
83	v4l2_device_unregister_subdev(sd);
84	media_entity_cleanup(&sd->entity);
85
86	return 0;
87}