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
220
221
222
|
/*
* vsp1_hgt.c -- R-Car VSP1 Histogram Generator 2D
*
* Copyright (C) 2016 Renesas Electronics Corporation
*
* Contact: Niklas Söderlund (niklas.soderlund@ragnatech.se)
*
* 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 <media/videobuf2-vmalloc.h>
#include "vsp1.h"
#include "vsp1_dl.h"
#include "vsp1_hgt.h"
#define HGT_DATA_SIZE ((2 + 6 * 32) * 4)
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline u32 vsp1_hgt_read(struct vsp1_hgt *hgt, u32 reg)
{
return vsp1_read(hgt->histo.entity.vsp1, reg);
}
static inline void vsp1_hgt_write(struct vsp1_hgt *hgt, struct vsp1_dl_list *dl,
u32 reg, u32 data)
{
vsp1_dl_list_write(dl, reg, data);
}
/* -----------------------------------------------------------------------------
* Frame End Handler
*/
void vsp1_hgt_frame_end(struct vsp1_entity *entity)
{
struct vsp1_hgt *hgt = to_hgt(&entity->subdev);
struct vsp1_histogram_buffer *buf;
unsigned int m;
unsigned int n;
u32 *data;
buf = vsp1_histogram_buffer_get(&hgt->histo);
if (!buf)
return;
data = buf->addr;
*data++ = vsp1_hgt_read(hgt, VI6_HGT_MAXMIN);
*data++ = vsp1_hgt_read(hgt, VI6_HGT_SUM);
for (m = 0; m < 6; ++m)
for (n = 0; n < 32; ++n)
*data++ = vsp1_hgt_read(hgt, VI6_HGT_HISTO(m, n));
vsp1_histogram_buffer_complete(&hgt->histo, buf, HGT_DATA_SIZE);
}
/* -----------------------------------------------------------------------------
* Controls
*/
#define V4L2_CID_VSP1_HGT_HUE_AREAS (V4L2_CID_USER_BASE | 0x1001)
static int hgt_hue_areas_try_ctrl(struct v4l2_ctrl *ctrl)
{
const u8 *values = ctrl->p_new.p_u8;
unsigned int i;
/*
* The hardware has constraints on the hue area boundaries beyond the
* control min, max and step. The values must match one of the following
* expressions.
*
* 0L <= 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U
* 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U <= 0L
*
* Start by verifying the common part...
*/
for (i = 1; i < (HGT_NUM_HUE_AREAS * 2) - 1; ++i) {
if (values[i] > values[i+1])
return -EINVAL;
}
/* ... and handle 0L separately. */
if (values[0] > values[1] && values[11] > values[0])
return -EINVAL;
return 0;
}
static int hgt_hue_areas_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct vsp1_hgt *hgt = container_of(ctrl->handler, struct vsp1_hgt,
ctrls);
memcpy(hgt->hue_areas, ctrl->p_new.p_u8, sizeof(hgt->hue_areas));
return 0;
}
static const struct v4l2_ctrl_ops hgt_hue_areas_ctrl_ops = {
.try_ctrl = hgt_hue_areas_try_ctrl,
.s_ctrl = hgt_hue_areas_s_ctrl,
};
static const struct v4l2_ctrl_config hgt_hue_areas = {
.ops = &hgt_hue_areas_ctrl_ops,
.id = V4L2_CID_VSP1_HGT_HUE_AREAS,
.name = "Boundary Values for Hue Area",
.type = V4L2_CTRL_TYPE_U8,
.min = 0,
.max = 255,
.def = 0,
.step = 1,
.dims = { 12 },
};
/* -----------------------------------------------------------------------------
* VSP1 Entity Operations
*/
static void hgt_configure(struct vsp1_entity *entity,
struct vsp1_pipeline *pipe,
struct vsp1_dl_list *dl,
enum vsp1_entity_params params)
{
struct vsp1_hgt *hgt = to_hgt(&entity->subdev);
struct v4l2_rect *compose;
struct v4l2_rect *crop;
unsigned int hratio;
unsigned int vratio;
u8 lower;
u8 upper;
unsigned int i;
if (params != VSP1_ENTITY_PARAMS_INIT)
return;
crop = vsp1_entity_get_pad_selection(entity, entity->config,
HISTO_PAD_SINK, V4L2_SEL_TGT_CROP);
compose = vsp1_entity_get_pad_selection(entity, entity->config,
HISTO_PAD_SINK,
V4L2_SEL_TGT_COMPOSE);
vsp1_hgt_write(hgt, dl, VI6_HGT_REGRST, VI6_HGT_REGRST_RCLEA);
vsp1_hgt_write(hgt, dl, VI6_HGT_OFFSET,
(crop->left << VI6_HGT_OFFSET_HOFFSET_SHIFT) |
(crop->top << VI6_HGT_OFFSET_VOFFSET_SHIFT));
vsp1_hgt_write(hgt, dl, VI6_HGT_SIZE,
(crop->width << VI6_HGT_SIZE_HSIZE_SHIFT) |
(crop->height << VI6_HGT_SIZE_VSIZE_SHIFT));
mutex_lock(hgt->ctrls.lock);
for (i = 0; i < HGT_NUM_HUE_AREAS; ++i) {
lower = hgt->hue_areas[i*2 + 0];
upper = hgt->hue_areas[i*2 + 1];
vsp1_hgt_write(hgt, dl, VI6_HGT_HUE_AREA(i),
(lower << VI6_HGT_HUE_AREA_LOWER_SHIFT) |
(upper << VI6_HGT_HUE_AREA_UPPER_SHIFT));
}
mutex_unlock(hgt->ctrls.lock);
hratio = crop->width * 2 / compose->width / 3;
vratio = crop->height * 2 / compose->height / 3;
vsp1_hgt_write(hgt, dl, VI6_HGT_MODE,
(hratio << VI6_HGT_MODE_HRATIO_SHIFT) |
(vratio << VI6_HGT_MODE_VRATIO_SHIFT));
}
static const struct vsp1_entity_operations hgt_entity_ops = {
.configure = hgt_configure,
.destroy = vsp1_histogram_destroy,
};
/* -----------------------------------------------------------------------------
* Initialization and Cleanup
*/
static const unsigned int hgt_mbus_formats[] = {
MEDIA_BUS_FMT_AHSV8888_1X32,
};
struct vsp1_hgt *vsp1_hgt_create(struct vsp1_device *vsp1)
{
struct vsp1_hgt *hgt;
int ret;
hgt = devm_kzalloc(vsp1->dev, sizeof(*hgt), GFP_KERNEL);
if (hgt == NULL)
return ERR_PTR(-ENOMEM);
/* Initialize the control handler. */
v4l2_ctrl_handler_init(&hgt->ctrls, 1);
v4l2_ctrl_new_custom(&hgt->ctrls, &hgt_hue_areas, NULL);
hgt->histo.entity.subdev.ctrl_handler = &hgt->ctrls;
/* Initialize the video device and queue for statistics data. */
ret = vsp1_histogram_init(vsp1, &hgt->histo, VSP1_ENTITY_HGT, "hgt",
&hgt_entity_ops, hgt_mbus_formats,
ARRAY_SIZE(hgt_mbus_formats),
HGT_DATA_SIZE, V4L2_META_FMT_VSP1_HGT);
if (ret < 0) {
vsp1_entity_destroy(&hgt->histo.entity);
return ERR_PTR(ret);
}
v4l2_ctrl_handler_setup(&hgt->ctrls);
return hgt;
}
|
