aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/platform/vsp1/vsp1_hsit.c
blob: 80bedc554ee3ccba89dabbccf495af1a2d81178f (plain)
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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
/*
 * vsp1_hsit.c  --  R-Car VSP1 Hue Saturation value (Inverse) Transform
 *
 * Copyright (C) 2013 Renesas 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_hsit.h"

#define HSIT_MIN_SIZE				4U
#define HSIT_MAX_SIZE				8190U

/* -----------------------------------------------------------------------------
 * Device Access
 */

static inline u32 vsp1_hsit_read(struct vsp1_hsit *hsit, u32 reg)
{
	return vsp1_read(hsit->entity.vsp1, reg);
}

static inline void vsp1_hsit_write(struct vsp1_hsit *hsit, u32 reg, u32 data)
{
	vsp1_write(hsit->entity.vsp1, reg, data);
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Core Operations
 */

static int hsit_s_stream(struct v4l2_subdev *subdev, int enable)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);

	if (!enable)
		return 0;

	if (hsit->inverse)
		vsp1_hsit_write(hsit, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
	else
		vsp1_hsit_write(hsit, VI6_HST_CTRL, VI6_HST_CTRL_EN);

	return 0;
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Pad Operations
 */

static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_fh *fh,
			       struct v4l2_subdev_mbus_code_enum *code)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);

	if (code->index > 0)
		return -EINVAL;

	if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
	    (code->pad == HSIT_PAD_SOURCE && hsit->inverse))
		code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
	else
		code->code = MEDIA_BUS_FMT_AHSV8888_1X32;

	return 0;
}

static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
				struct v4l2_subdev_fh *fh,
				struct v4l2_subdev_frame_size_enum *fse)
{
	struct v4l2_mbus_framefmt *format;

	format = v4l2_subdev_get_try_format(fh, fse->pad);

	if (fse->index || fse->code != format->code)
		return -EINVAL;

	if (fse->pad == HSIT_PAD_SINK) {
		fse->min_width = HSIT_MIN_SIZE;
		fse->max_width = HSIT_MAX_SIZE;
		fse->min_height = HSIT_MIN_SIZE;
		fse->max_height = HSIT_MAX_SIZE;
	} else {
		/* The size on the source pad are fixed and always identical to
		 * the size on the sink pad.
		 */
		fse->min_width = format->width;
		fse->max_width = format->width;
		fse->min_height = format->height;
		fse->max_height = format->height;
	}

	return 0;
}

static int hsit_get_format(struct v4l2_subdev *subdev,
			   struct v4l2_subdev_fh *fh,
			   struct v4l2_subdev_format *fmt)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);

	fmt->format = *vsp1_entity_get_pad_format(&hsit->entity, fh, fmt->pad,
						  fmt->which);

	return 0;
}

static int hsit_set_format(struct v4l2_subdev *subdev,
			   struct v4l2_subdev_fh *fh,
			   struct v4l2_subdev_format *fmt)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);
	struct v4l2_mbus_framefmt *format;

	format = vsp1_entity_get_pad_format(&hsit->entity, fh, fmt->pad,
					    fmt->which);

	if (fmt->pad == HSIT_PAD_SOURCE) {
		/* The HST and HSI output format code and resolution can't be
		 * modified.
		 */
		fmt->format = *format;
		return 0;
	}

	format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
		     : MEDIA_BUS_FMT_ARGB8888_1X32;
	format->width = clamp_t(unsigned int, fmt->format.width,
				HSIT_MIN_SIZE, HSIT_MAX_SIZE);
	format->height = clamp_t(unsigned int, fmt->format.height,
				 HSIT_MIN_SIZE, HSIT_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(&hsit->entity, fh, HSIT_PAD_SOURCE,
					    fmt->which);
	*format = fmt->format;
	format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
		     : MEDIA_BUS_FMT_AHSV8888_1X32;

	return 0;
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Operations
 */

static struct v4l2_subdev_video_ops hsit_video_ops = {
	.s_stream = hsit_s_stream,
};

static struct v4l2_subdev_pad_ops hsit_pad_ops = {
	.enum_mbus_code = hsit_enum_mbus_code,
	.enum_frame_size = hsit_enum_frame_size,
	.get_fmt = hsit_get_format,
	.set_fmt = hsit_set_format,
};

static struct v4l2_subdev_ops hsit_ops = {
	.video	= &hsit_video_ops,
	.pad    = &hsit_pad_ops,
};

/* -----------------------------------------------------------------------------
 * Initialization and Cleanup
 */

struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
{
	struct v4l2_subdev *subdev;
	struct vsp1_hsit *hsit;
	int ret;

	hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
	if (hsit == NULL)
		return ERR_PTR(-ENOMEM);

	hsit->inverse = inverse;

	if (inverse)
		hsit->entity.type = VSP1_ENTITY_HSI;
	else
		hsit->entity.type = VSP1_ENTITY_HST;

	ret = vsp1_entity_init(vsp1, &hsit->entity, 2);
	if (ret < 0)
		return ERR_PTR(ret);

	/* Initialize the V4L2 subdev. */
	subdev = &hsit->entity.subdev;
	v4l2_subdev_init(subdev, &hsit_ops);

	subdev->entity.ops = &vsp1_media_ops;
	subdev->internal_ops = &vsp1_subdev_internal_ops;
	snprintf(subdev->name, sizeof(subdev->name), "%s %s",
		 dev_name(vsp1->dev), inverse ? "hsi" : "hst");
	v4l2_set_subdevdata(subdev, hsit);
	subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

	vsp1_entity_init_formats(subdev, NULL);

	return hsit;
}

Privacy Policy