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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 	u16 width;
46 	u16 height;
47 	u32 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 
55 static inline struct rkvdec_decoded_buffer *
vb2_to_rkvdec_decoded_buf(struct vb2_buffer * buf)56 vb2_to_rkvdec_decoded_buf(struct vb2_buffer *buf)
57 {
58 	return container_of(buf, struct rkvdec_decoded_buffer,
59 			    base.vb.vb2_buf);
60 }
61 
62 struct rkvdec_coded_fmt_ops {
63 	int (*adjust_fmt)(struct rkvdec_ctx *ctx,
64 			  struct v4l2_format *f);
65 	int (*start)(struct rkvdec_ctx *ctx);
66 	void (*stop)(struct rkvdec_ctx *ctx);
67 	int (*run)(struct rkvdec_ctx *ctx);
68 	void (*done)(struct rkvdec_ctx *ctx, struct vb2_v4l2_buffer *src_buf,
69 		     struct vb2_v4l2_buffer *dst_buf,
70 		     enum vb2_buffer_state result);
71 };
72 
73 struct rkvdec_coded_fmt_desc {
74 	u32 fourcc;
75 	struct v4l2_frmsize_stepwise frmsize;
76 	const struct rkvdec_ctrls *ctrls;
77 	const struct rkvdec_coded_fmt_ops *ops;
78 	unsigned int num_decoded_fmts;
79 	const u32 *decoded_fmts;
80 };
81 
82 struct rkvdec_dev {
83 	struct v4l2_device v4l2_dev;
84 	struct media_device mdev;
85 	struct video_device vdev;
86 	struct v4l2_m2m_dev *m2m_dev;
87 	struct device *dev;
88 	struct clk_bulk_data *clocks;
89 	void __iomem *regs;
90 	struct mutex vdev_lock; /* serializes ioctls */
91 	struct delayed_work watchdog_work;
92 };
93 
94 struct rkvdec_ctx {
95 	struct v4l2_fh fh;
96 	struct v4l2_format coded_fmt;
97 	struct v4l2_format decoded_fmt;
98 	const struct rkvdec_coded_fmt_desc *coded_fmt_desc;
99 	struct v4l2_ctrl_handler ctrl_hdl;
100 	struct rkvdec_dev *dev;
101 	void *priv;
102 };
103 
fh_to_rkvdec_ctx(struct v4l2_fh * fh)104 static inline struct rkvdec_ctx *fh_to_rkvdec_ctx(struct v4l2_fh *fh)
105 {
106 	return container_of(fh, struct rkvdec_ctx, fh);
107 }
108 
109 struct rkvdec_aux_buf {
110 	void *cpu;
111 	dma_addr_t dma;
112 	size_t size;
113 };
114 
115 void rkvdec_run_preamble(struct rkvdec_ctx *ctx, struct rkvdec_run *run);
116 void rkvdec_run_postamble(struct rkvdec_ctx *ctx, struct rkvdec_run *run);
117 
118 extern const struct rkvdec_coded_fmt_ops rkvdec_h264_fmt_ops;
119 #endif /* RKVDEC_H_ */
120