1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2021-2022 Digiteq Automotive
4  *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
5  */
6 
7 #ifndef __MGB4_IO_H__
8 #define __MGB4_IO_H__
9 
10 #include <linux/math64.h>
11 #include <media/v4l2-dev.h>
12 #include "mgb4_core.h"
13 
14 /* Register access error indication */
15 #define MGB4_ERR_NO_REG        0xFFFFFFFE
16 /* Frame buffer addresses greater than 0xFFFFFFFA indicate HW errors */
17 #define MGB4_ERR_QUEUE_TIMEOUT 0xFFFFFFFD
18 #define MGB4_ERR_QUEUE_EMPTY   0xFFFFFFFC
19 #define MGB4_ERR_QUEUE_FULL    0xFFFFFFFB
20 
21 #define MGB4_PERIOD(numerator, denominator) \
22 	((u32)div_u64((MGB4_HW_FREQ * (u64)(numerator)), (denominator)))
23 
24 struct mgb4_frame_buffer {
25 	struct vb2_v4l2_buffer vb;
26 	struct list_head list;
27 };
28 
to_frame_buffer(struct vb2_v4l2_buffer * vbuf)29 static inline struct mgb4_frame_buffer *to_frame_buffer(struct vb2_v4l2_buffer *vbuf)
30 {
31 	return container_of(vbuf, struct mgb4_frame_buffer, vb);
32 }
33 
has_yuv_and_timeperframe(struct mgb4_regs * video)34 static inline bool has_yuv_and_timeperframe(struct mgb4_regs *video)
35 {
36 	u32 status = mgb4_read_reg(video, 0xD0);
37 
38 	return (status & (1U << 8));
39 }
40 
41 #define has_yuv(video) has_yuv_and_timeperframe(video)
42 #define has_timeperframe(video) has_yuv_and_timeperframe(video)
43 
pixel_size(struct v4l2_dv_timings * timings)44 static inline u32 pixel_size(struct v4l2_dv_timings *timings)
45 {
46 	struct v4l2_bt_timings *bt = &timings->bt;
47 
48 	u32 height = bt->height + bt->vfrontporch + bt->vsync + bt->vbackporch;
49 	u32 width = bt->width + bt->hfrontporch + bt->hsync + bt->hbackporch;
50 
51 	return width * height;
52 }
53 
54 #endif
55