drivers/media/pci/mgb4/mgb4_io.h

   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
  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
  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
  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