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