1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/*
* vsp1_lif.c -- R-Car VSP1 LCD Controller Interface
*
* Copyright (C) 2013-2014 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/device.h>
#include <linux/gfp.h>
#include <media/v4l2-subdev.h>
#include "vsp1.h"
#include "vsp1_dl.h"
#include "vsp1_lif.h"
#define LIF_MIN_SIZE 2U
#define LIF_MAX_SIZE 8190U
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline void vsp1_lif_write(struct vsp1_lif *lif, struct vsp1_dl_list *dl,
u32 reg, u32 data)
{
vsp1_dl_list_write(dl, reg, data);
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Operations
*/
static int lif_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
static const unsigned int codes[] = {
MEDIA_BUS_FMT_ARGB8888_1X32,
MEDIA_BUS_FMT_AYUV8_1X32,
};
return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
ARRAY_SIZE(codes));
}
static int lif_enum_frame_size(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
return vsp1_subdev_enum_frame_size(subdev, cfg, fse, LIF_MIN_SIZE,
LIF_MIN_SIZE, LIF_MAX_SIZE,
LIF_MAX_SIZE);
}
static int lif_set_format(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct vsp1_lif *lif = to_lif(subdev);
struct v4l2_subdev_pad_config *config;
struct v4l2_mbus_framefmt *format;
config = vsp1_entity_get_pad_config(&lif->entity, cfg, fmt->which);
if (!config)
return -EINVAL;
/* Default to YUV if the requested format is not supported. */
if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
format = vsp1_entity_get_pad_format(&lif->entity, config, fmt->pad);
if (fmt->pad == LIF_PAD_SOURCE) {
/* The LIF source format is always identical to its sink
* format.
*/
fmt->format = *format;
return 0;
}
format->code = fmt->format.code;
format->width = clamp_t(unsigned int, fmt->format.width,
LIF_MIN_SIZE, LIF_MAX_SIZE);
format->height = clamp_t(unsigned int, fmt->format.height,
LIF_MIN_SIZE, LIF_MAX_SIZE);
format->field = V4L2_FIELD_NONE;
format->colorspace = V4L2_COLORSPACE_SRGB;
fmt->format = *format;
/* Propagate the format to the source pad. */
format = vsp1_entity_get_pad_format(&lif->entity, config,
LIF_PAD_SOURCE);
*format = fmt->format;
return 0;
}
static const struct v4l2_subdev_pad_ops lif_pad_ops = {
.init_cfg = vsp1_entity_init_cfg,
.enum_mbus_code = lif_enum_mbus_code,
.enum_frame_size = lif_enum_frame_size,
.get_fmt = vsp1_subdev_get_pad_format,
.set_fmt = lif_set_format,
};
static const struct v4l2_subdev_ops lif_ops = {
.pad = &lif_pad_ops,
};
/* -----------------------------------------------------------------------------
* VSP1 Entity Operations
*/
static void lif_configure(struct vsp1_entity *entity,
struct vsp1_pipeline *pipe,
struct vsp1_dl_list *dl)
{
const struct v4l2_mbus_framefmt *format;
struct vsp1_lif *lif = to_lif(&entity->subdev);
unsigned int hbth = 1300;
unsigned int obth = 400;
unsigned int lbth = 200;
format = vsp1_entity_get_pad_format(&lif->entity, lif->entity.config,
LIF_PAD_SOURCE);
obth = min(obth, (format->width + 1) / 2 * format->height - 4);
vsp1_lif_write(lif, dl, VI6_LIF_CSBTH,
(hbth << VI6_LIF_CSBTH_HBTH_SHIFT) |
(lbth << VI6_LIF_CSBTH_LBTH_SHIFT));
vsp1_lif_write(lif, dl, VI6_LIF_CTRL,
(obth << VI6_LIF_CTRL_OBTH_SHIFT) |
(format->code == 0 ? VI6_LIF_CTRL_CFMT : 0) |
VI6_LIF_CTRL_REQSEL | VI6_LIF_CTRL_LIF_EN);
}
static const struct vsp1_entity_operations lif_entity_ops = {
.configure = lif_configure,
};
/* -----------------------------------------------------------------------------
* Initialization and Cleanup
*/
struct vsp1_lif *vsp1_lif_create(struct vsp1_device *vsp1)
{
struct vsp1_lif *lif;
int ret;
lif = devm_kzalloc(vsp1->dev, sizeof(*lif), GFP_KERNEL);
if (lif == NULL)
return ERR_PTR(-ENOMEM);
lif->entity.ops = &lif_entity_ops;
lif->entity.type = VSP1_ENTITY_LIF;
/* The LIF is never exposed to userspace, but media entity registration
* requires a function to be set. Use PROC_VIDEO_PIXEL_FORMATTER just to
* avoid triggering a WARN_ON(), the value won't be seen anywhere.
*/
ret = vsp1_entity_init(vsp1, &lif->entity, "lif", 2, &lif_ops,
MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
if (ret < 0)
return ERR_PTR(ret);
return lif;
}
|
