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gerrit-public.fairphone.software / kernel / msm-4.19 / 26e0ca22c3b85b04f693dd0422f13a61846ccfa9 / . / drivers / media / platform / vsp1 / vsp1_rwpf.c
blob: 9752d5516cebc995b89071f0cc7fe4fbf169117d [file] [log] [blame]
Laurent Pinchart26e0ca22013-06-04 11:22:30 -0300[diff] [blame^]1/*
2 * vsp1_rwpf.c -- R-Car VSP1 Read and Write Pixel Formatters
3 *
4 * Copyright (C) 2013 Renesas Corporation
5 *
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <media/v4l2-subdev.h>
15
16#include "vsp1.h"
17#include "vsp1_rwpf.h"
18#include "vsp1_video.h"
19
20#define RWPF_MIN_WIDTH 1
21#define RWPF_MIN_HEIGHT 1
22
23/* -----------------------------------------------------------------------------
24 * V4L2 Subdevice Pad Operations
25 */
26
27int vsp1_rwpf_enum_mbus_code(struct v4l2_subdev *subdev,
28 struct v4l2_subdev_fh *fh,
29 struct v4l2_subdev_mbus_code_enum *code)
30{
31 static const unsigned int codes[] = {
32 V4L2_MBUS_FMT_ARGB8888_1X32,
33 V4L2_MBUS_FMT_AYUV8_1X32,
34 };
35
36 if (code->index >= ARRAY_SIZE(codes))
37 return -EINVAL;
38
39 code->code = codes[code->index];
40
41 return 0;
42}
43
44int vsp1_rwpf_enum_frame_size(struct v4l2_subdev *subdev,
45 struct v4l2_subdev_fh *fh,
46 struct v4l2_subdev_frame_size_enum *fse)
47{
48 struct vsp1_rwpf *rwpf = to_rwpf(subdev);
49 struct v4l2_mbus_framefmt *format;
50
51 format = v4l2_subdev_get_try_format(fh, fse->pad);
52
53 if (fse->index || fse->code != format->code)
54 return -EINVAL;
55
56 if (fse->pad == RWPF_PAD_SINK) {
57 fse->min_width = RWPF_MIN_WIDTH;
58 fse->max_width = rwpf->max_width;
59 fse->min_height = RWPF_MIN_HEIGHT;
60 fse->max_height = rwpf->max_height;
61 } else {
62 /* The size on the source pad are fixed and always identical to
63 * the size on the sink pad.
64 */
65 fse->min_width = format->width;
66 fse->max_width = format->width;
67 fse->min_height = format->height;
68 fse->max_height = format->height;
69 }
70
71 return 0;
72}
73
74int vsp1_rwpf_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
75 struct v4l2_subdev_format *fmt)
76{
77 struct vsp1_rwpf *rwpf = to_rwpf(subdev);
78
79 fmt->format = *vsp1_entity_get_pad_format(&rwpf->entity, fh, fmt->pad,
80 fmt->which);
81
82 return 0;
83}
84
85int vsp1_rwpf_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
86 struct v4l2_subdev_format *fmt)
87{
88 struct vsp1_rwpf *rwpf = to_rwpf(subdev);
89 struct v4l2_mbus_framefmt *format;
90
91 /* Default to YUV if the requested format is not supported. */
92 if (fmt->format.code != V4L2_MBUS_FMT_ARGB8888_1X32 &&
93 fmt->format.code != V4L2_MBUS_FMT_AYUV8_1X32)
94 fmt->format.code = V4L2_MBUS_FMT_AYUV8_1X32;
95
96 format = vsp1_entity_get_pad_format(&rwpf->entity, fh, fmt->pad,
97 fmt->which);
98
99 if (fmt->pad == RWPF_PAD_SOURCE) {
100 /* The RWPF performs format conversion but can't scale, only the
101 * format code can be changed on the source pad.
102 */
103 format->code = fmt->format.code;
104 fmt->format = *format;
105 return 0;
106 }
107
108 format->code = fmt->format.code;
109 format->width = clamp_t(unsigned int, fmt->format.width,
110 RWPF_MIN_WIDTH, rwpf->max_width);
111 format->height = clamp_t(unsigned int, fmt->format.height,
112 RWPF_MIN_HEIGHT, rwpf->max_height);
113 format->field = V4L2_FIELD_NONE;
114 format->colorspace = V4L2_COLORSPACE_SRGB;
115
116 fmt->format = *format;
117
118 /* Propagate the format to the source pad. */
119 format = vsp1_entity_get_pad_format(&rwpf->entity, fh, RWPF_PAD_SOURCE,
120 fmt->which);
121 *format = fmt->format;
122
123 return 0;
124}