1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Rockchip Video Decoder driver
4 *
5 * Copyright (C) 2019 Collabora, Ltd.
6 *
7 * Based on rkvdec driver by Google LLC. (Tomasz Figa <tfiga@chromium.org>)
8 * Based on s5p-mfc driver by Samsung Electronics Co., Ltd.
9 * Copyright (C) 2011 Samsung Electronics Co., Ltd.
10 */
11 #ifndef RKVDEC_H_
12 #define RKVDEC_H_
13
14 #include <linux/platform_device.h>
15 #include <linux/videodev2.h>
16 #include <linux/wait.h>
17 #include <linux/clk.h>
18
19 #include <media/v4l2-ctrls.h>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-ioctl.h>
22 #include <media/videobuf2-core.h>
23 #include <media/videobuf2-dma-contig.h>
24
25 struct rkvdec_ctx;
26
27 struct rkvdec_ctrl_desc {
28 struct v4l2_ctrl_config cfg;
29 };
30
31 struct rkvdec_ctrls {
32 const struct rkvdec_ctrl_desc *ctrls;
33 unsigned int num_ctrls;
34 };
35
36 struct rkvdec_run {
37 struct {
38 struct vb2_v4l2_buffer *src;
39 struct vb2_v4l2_buffer *dst;
40 } bufs;
41 };
42
43 struct rkvdec_vp9_decoded_buffer_info {
44 /* Info needed when the decoded frame serves as a reference frame. */
45 unsigned short width;
46 unsigned short height;
47 unsigned int bit_depth : 4;
48 };
49
50 struct rkvdec_decoded_buffer {
51 /* Must be the first field in this struct. */
52 struct v4l2_m2m_buffer base;
53
54 union {
55 struct rkvdec_vp9_decoded_buffer_info vp9;
56 };
57 };
58
59 static inline struct rkvdec_decoded_buffer *
vb2_to_rkvdec_decoded_buf(struct vb2_buffer * buf)60 vb2_to_rkvdec_decoded_buf(struct vb2_buffer *buf)
61 {
62 return container_of(buf, struct rkvdec_decoded_buffer,
63 base.vb.vb2_buf);
64 }
65
66 struct rkvdec_coded_fmt_ops {
67 int (*adjust_fmt)(struct rkvdec_ctx *ctx,
68 struct v4l2_format *f);
69 int (*start)(struct rkvdec_ctx *ctx);
70 void (*stop)(struct rkvdec_ctx *ctx);
71 int (*run)(struct rkvdec_ctx *ctx);
72 void (*done)(struct rkvdec_ctx *ctx, struct vb2_v4l2_buffer *src_buf,
73 struct vb2_v4l2_buffer *dst_buf,
74 enum vb2_buffer_state result);
75 int (*try_ctrl)(struct rkvdec_ctx *ctx, struct v4l2_ctrl *ctrl);
76 };
77
78 struct rkvdec_coded_fmt_desc {
79 u32 fourcc;
80 struct v4l2_frmsize_stepwise frmsize;
81 const struct rkvdec_ctrls *ctrls;
82 const struct rkvdec_coded_fmt_ops *ops;
83 unsigned int num_decoded_fmts;
84 const u32 *decoded_fmts;
85 u32 subsystem_flags;
86 };
87
88 struct rkvdec_dev {
89 struct v4l2_device v4l2_dev;
90 struct media_device mdev;
91 struct video_device vdev;
92 struct v4l2_m2m_dev *m2m_dev;
93 struct device *dev;
94 struct clk_bulk_data *clocks;
95 void __iomem *regs;
96 struct mutex vdev_lock; /* serializes ioctls */
97 struct delayed_work watchdog_work;
98 };
99
100 struct rkvdec_ctx {
101 struct v4l2_fh fh;
102 struct v4l2_format coded_fmt;
103 struct v4l2_format decoded_fmt;
104 const struct rkvdec_coded_fmt_desc *coded_fmt_desc;
105 struct v4l2_ctrl_handler ctrl_hdl;
106 struct rkvdec_dev *dev;
107 void *priv;
108 };
109
fh_to_rkvdec_ctx(struct v4l2_fh * fh)110 static inline struct rkvdec_ctx *fh_to_rkvdec_ctx(struct v4l2_fh *fh)
111 {
112 return container_of(fh, struct rkvdec_ctx, fh);
113 }
114
115 struct rkvdec_aux_buf {
116 void *cpu;
117 dma_addr_t dma;
118 size_t size;
119 };
120
121 void rkvdec_run_preamble(struct rkvdec_ctx *ctx, struct rkvdec_run *run);
122 void rkvdec_run_postamble(struct rkvdec_ctx *ctx, struct rkvdec_run *run);
123
124 extern const struct rkvdec_coded_fmt_ops rkvdec_h264_fmt_ops;
125 extern const struct rkvdec_coded_fmt_ops rkvdec_vp9_fmt_ops;
126
127 #endif /* RKVDEC_H_ */
128