path: root/drivers/frame_provider/decoder/utils/vdec_v4l2_buffer_ops.c (plain)
blob: 763d62e33e882220ef8d623794a3cecfa829b201

1	#include <linux/file.h>
2	#include <linux/anon_inodes.h>
3	#include "vdec_v4l2_buffer_ops.h"
4
5	const struct file_operations v4l2_file_fops = {};
6
7	static int is_v4l2_buf_file(struct file *file)
8	{
9	return file->f_op == &v4l2_file_fops;
10	}
11
12	static int vdec_v4l_alloc_fd(void)
13	{
14	int fd;
15	struct file *file = NULL;
16
17	fd = get_unused_fd_flags(O_CLOEXEC);
18	if (fd < 0) {
19	pr_err("v4l: get unused fd fail\n");
20	return fd;
21	}
22
23	file = anon_inode_getfile("v4l2_meta_file", &v4l2_file_fops, NULL, 0);
24	if (IS_ERR(file)) {
25	put_unused_fd(fd);
26	pr_err("v4l: get file faill\n");
27	return PTR_ERR(file);
28	}
29
30	fd_install(fd, file);
31
32	pr_info("v4l: fd %d, file %p, data %p\n",
33	fd, file, file->private_data);
34
35	return fd;
36	}
37
38	static int vdec_v4l_fd_install_data(int fd, void *data)
39	{
40	struct file *file;
41
42	file = fget(fd);
43
44	if (!file) {
45	pr_info("v4l: fget fd %d fail!, comm %s, pid %d\n",
46	fd, current->comm, current->pid);
47	return -EBADF;
48	}
49
50	if (!is_v4l2_buf_file(file)) {
51	pr_info("v4l: v4l2 check fd fail!\n");
52	return -EBADF;
53	}
54
55	file->private_data = data;
56
57	return 0;
58	}
59
60	int vdec_v4l_binding_fd_and_vf(ulong v4l_handle, void *vf)
61	{
62	int ret = 0, fd = -1;
63	struct vdec_v4l2_buffer *v4l_buf =
64	(struct vdec_v4l2_buffer *) v4l_handle;
65
66	if (v4l_buf->m.vf_fd > 0)
67	return 0;
68
69	fd = vdec_v4l_alloc_fd();
70	if (fd < 0) {
71	pr_err("v4l: alloc fd fail %d.\n", fd);
72	return fd;
73	}
74
75	ret = vdec_v4l_fd_install_data(fd, vf);
76	if (ret < 0) {
77	put_unused_fd(fd);
78	pr_err("v4l: fd install data fail %d.\n", ret);
79	return ret;
80	}
81
82	v4l_buf->m.vf_fd = fd;
83
84	return 0;
85	}
86	EXPORT_SYMBOL(vdec_v4l_binding_fd_and_vf);
87
88	int vdec_v4l_get_buffer(struct aml_vcodec_ctx *ctx,
89	struct vdec_v4l2_buffer **out)
90	{
91	int ret = 0;
92
93	if (ctx->drv_handle == 0)
94	return -EIO;
95
96	ret = ctx->dec_if->get_param(ctx->drv_handle,
97	GET_PARAM_FREE_FRAME_BUFFER, out);
98
99	return ret;
100	}
101	EXPORT_SYMBOL(vdec_v4l_get_buffer);
102
103	int vdec_v4l_set_pic_infos(struct aml_vcodec_ctx *ctx,
104	struct aml_vdec_pic_infos *info)
105	{
106	int ret = 0;
107
108	if (ctx->drv_handle == 0)
109	return -EIO;
110
111	ret = ctx->dec_if->set_param(ctx->drv_handle,
112	SET_PARAM_PIC_INFO, info);
113
114	return ret;
115	}
116	EXPORT_SYMBOL(vdec_v4l_set_pic_infos);
117
118	int vdec_v4l_write_frame_sync(struct aml_vcodec_ctx *ctx)
119	{
120	int ret = 0;
121
122	if (ctx->drv_handle == 0)
123	return -EIO;
124
125	ret = ctx->dec_if->set_param(ctx->drv_handle,
126	SET_PARAM_WRITE_FRAME_SYNC, NULL);
127
128	return ret;
129	}
130	EXPORT_SYMBOL(vdec_v4l_write_frame_sync);
131
132