summaryrefslogtreecommitdiff
path: root/drivers/media/platform/vivid/vivid-touch-cap.c
blob: ebb00b128030c9d88c4f4296c014a0766ac369e4 (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
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
// SPDX-License-Identifier: GPL-2.0-only
/*
 * vivid-touch-cap.c - touch support functions.
 */

#include "vivid-core.h"
#include "vivid-kthread-touch.h"
#include "vivid-vid-common.h"
#include "vivid-touch-cap.h"

static int touch_cap_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
				 unsigned int *nplanes, unsigned int sizes[],
				 struct device *alloc_devs[])
{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);
	struct v4l2_pix_format *f = &dev->tch_format;
	unsigned int size = f->sizeimage;

	if (*nplanes) {
		if (sizes[0] < size)
			return -EINVAL;
	} else {
		sizes[0] = size;
	}

	if (vq->num_buffers + *nbuffers < 2)
		*nbuffers = 2 - vq->num_buffers;

	*nplanes = 1;
	return 0;
}

static int touch_cap_buf_prepare(struct vb2_buffer *vb)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
	struct v4l2_pix_format *f = &dev->tch_format;
	unsigned int size = f->sizeimage;

	if (dev->buf_prepare_error) {
		/*
		 * Error injection: test what happens if buf_prepare() returns
		 * an error.
		 */
		dev->buf_prepare_error = false;
		return -EINVAL;
	}
	if (vb2_plane_size(vb, 0) < size) {
		dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
			__func__, vb2_plane_size(vb, 0), size);
		return -EINVAL;
	}
	vb2_set_plane_payload(vb, 0, size);

	return 0;
}

static void touch_cap_buf_queue(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
	struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);

	vbuf->field = V4L2_FIELD_NONE;
	spin_lock(&dev->slock);
	list_add_tail(&buf->list, &dev->touch_cap_active);
	spin_unlock(&dev->slock);
}

static int touch_cap_start_streaming(struct vb2_queue *vq, unsigned int count)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);
	int err;

	dev->touch_cap_seq_count = 0;
	if (dev->start_streaming_error) {
		dev->start_streaming_error = false;
		err = -EINVAL;
	} else {
		err = vivid_start_generating_touch_cap(dev);
	}
	if (err) {
		struct vivid_buffer *buf, *tmp;

		list_for_each_entry_safe(buf, tmp,
					 &dev->touch_cap_active, list) {
			list_del(&buf->list);
			vb2_buffer_done(&buf->vb.vb2_buf,
					VB2_BUF_STATE_QUEUED);
		}
	}
	return err;
}

/* abort streaming and wait for last buffer */
static void touch_cap_stop_streaming(struct vb2_queue *vq)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);

	vivid_stop_generating_touch_cap(dev);
}

static void touch_cap_buf_request_complete(struct vb2_buffer *vb)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);

	v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_touch_cap);
}

const struct vb2_ops vivid_touch_cap_qops = {
	.queue_setup		= touch_cap_queue_setup,
	.buf_prepare		= touch_cap_buf_prepare,
	.buf_queue		= touch_cap_buf_queue,
	.start_streaming	= touch_cap_start_streaming,
	.stop_streaming		= touch_cap_stop_streaming,
	.buf_request_complete	= touch_cap_buf_request_complete,
	.wait_prepare		= vb2_ops_wait_prepare,
	.wait_finish		= vb2_ops_wait_finish,
};

int vivid_enum_fmt_tch(struct file *file, void  *priv, struct v4l2_fmtdesc *f)
{
	if (f->index)
		return -EINVAL;

	f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
	return 0;
}

int vivid_g_fmt_tch(struct file *file, void *priv, struct v4l2_format *f)
{
	struct vivid_dev *dev = video_drvdata(file);

	if (dev->multiplanar)
		return -ENOTTY;
	f->fmt.pix = dev->tch_format;
	return 0;
}

int vivid_g_fmt_tch_mplane(struct file *file, void *priv, struct v4l2_format *f)
{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_format sp_fmt;

	if (!dev->multiplanar)
		return -ENOTTY;
	sp_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	sp_fmt.fmt.pix = dev->tch_format;
	fmt_sp2mp(&sp_fmt, f);
	return 0;
}

int vivid_g_parm_tch(struct file *file, void *priv,
		     struct v4l2_streamparm *parm)
{
	struct vivid_dev *dev = video_drvdata(file);

	if (parm->type != (dev->multiplanar ?
			   V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE :
			   V4L2_BUF_TYPE_VIDEO_CAPTURE))
		return -EINVAL;

	parm->parm.capture.capability   = V4L2_CAP_TIMEPERFRAME;
	parm->parm.capture.timeperframe = dev->timeperframe_tch_cap;
	parm->parm.capture.readbuffers  = 1;
	return 0;
}

int vivid_enum_input_tch(struct file *file, void *priv, struct v4l2_input *inp)
{
	if (inp->index)
		return -EINVAL;

	inp->type = V4L2_INPUT_TYPE_TOUCH;
	strscpy(inp->name, "Vivid Touch", sizeof(inp->name));
	inp->capabilities = 0;
	return 0;
}

int vivid_g_input_tch(struct file *file, void *priv, unsigned int *i)
{
	*i = 0;
	return 0;
}

int vivid_set_touch(struct vivid_dev *dev, unsigned int i)
{
	struct v4l2_pix_format *f = &dev->tch_format;

	if (i)
		return -EINVAL;

	f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
	f->width =  VIVID_TCH_WIDTH;
	f->height = VIVID_TCH_HEIGHT;
	f->field = V4L2_FIELD_NONE;
	f->colorspace = V4L2_COLORSPACE_RAW;
	f->bytesperline = f->width * sizeof(s16);
	f->sizeimage = f->width * f->height * sizeof(s16);
	return 0;
}

int vivid_s_input_tch(struct file *file, void *priv, unsigned int i)
{
	return vivid_set_touch(video_drvdata(file), i);
}

static void vivid_fill_buff_noise(__s16 *tch_buf, int size)
{
	int i;

	/* Fill 10% of the values within range -3 and 3, zero the others */
	for (i = 0; i < size; i++) {
		unsigned int rand = get_random_int();

		if (rand % 10)
			tch_buf[i] = 0;
		else
			tch_buf[i] = (rand / 10) % 7 - 3;
	}
}

static inline int get_random_pressure(void)
{
	return get_random_int() % VIVID_PRESSURE_LIMIT;
}

static void vivid_tch_buf_set(struct v4l2_pix_format *f,
			      __s16 *tch_buf,
			      int index)
{
	unsigned int x = index % f->width;
	unsigned int y = index / f->width;
	unsigned int offset = VIVID_MIN_PRESSURE;

	tch_buf[index] = offset + get_random_pressure();
	offset /= 2;
	if (x)
		tch_buf[index - 1] = offset + get_random_pressure();
	if (x < f->width - 1)
		tch_buf[index + 1] = offset + get_random_pressure();
	if (y)
		tch_buf[index - f->width] = offset + get_random_pressure();
	if (y < f->height - 1)
		tch_buf[index + f->width] = offset + get_random_pressure();
	offset /= 2;
	if (x && y)
		tch_buf[index - 1 - f->width] = offset + get_random_pressure();
	if (x < f->width - 1 && y)
		tch_buf[index + 1 - f->width] = offset + get_random_pressure();
	if (x && y < f->height - 1)
		tch_buf[index - 1 + f->width] = offset + get_random_pressure();
	if (x < f->width - 1 && y < f->height - 1)
		tch_buf[index + 1 + f->width] = offset + get_random_pressure();
}

void vivid_fillbuff_tch(struct vivid_dev *dev, struct vivid_buffer *buf)
{
	struct v4l2_pix_format *f = &dev->tch_format;
	int size = f->width * f->height;
	int x, y, xstart, ystart, offset_x, offset_y;
	unsigned int test_pattern, test_pat_idx, rand;

	__s16 *tch_buf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);

	buf->vb.sequence = dev->touch_cap_seq_count;
	test_pattern = (buf->vb.sequence / TCH_SEQ_COUNT) % TEST_CASE_MAX;
	test_pat_idx = buf->vb.sequence % TCH_SEQ_COUNT;

	vivid_fill_buff_noise(tch_buf, size);

	if (test_pat_idx >= TCH_PATTERN_COUNT)
		return;

	if (test_pat_idx == 0)
		dev->tch_pat_random = get_random_int();
	rand = dev->tch_pat_random;

	switch (test_pattern) {
	case SINGLE_TAP:
		if (test_pat_idx == 2)
			vivid_tch_buf_set(f, tch_buf, rand % size);
		break;
	case DOUBLE_TAP:
		if (test_pat_idx == 2 || test_pat_idx == 4)
			vivid_tch_buf_set(f, tch_buf, rand % size);
		break;
	case TRIPLE_TAP:
		if (test_pat_idx == 2 || test_pat_idx == 4 || test_pat_idx == 6)
			vivid_tch_buf_set(f, tch_buf, rand % size);
		break;
	case MOVE_LEFT_TO_RIGHT:
		vivid_tch_buf_set(f, tch_buf,
				  (rand % f->height) * f->width +
				  test_pat_idx *
				  (f->width / TCH_PATTERN_COUNT));
		break;
	case ZOOM_IN:
		x = f->width / 2;
		y = f->height / 2;
		offset_x = ((TCH_PATTERN_COUNT - 1 - test_pat_idx) * x) /
				TCH_PATTERN_COUNT;
		offset_y = ((TCH_PATTERN_COUNT - 1 - test_pat_idx) * y) /
				TCH_PATTERN_COUNT;
		vivid_tch_buf_set(f, tch_buf,
				  (x - offset_x) + f->width * (y - offset_y));
		vivid_tch_buf_set(f, tch_buf,
				  (x + offset_x) + f->width * (y + offset_y));
		break;
	case ZOOM_OUT:
		x = f->width / 2;
		y = f->height / 2;
		offset_x = (test_pat_idx * x) / TCH_PATTERN_COUNT;
		offset_y = (test_pat_idx * y) / TCH_PATTERN_COUNT;
		vivid_tch_buf_set(f, tch_buf,
				  (x - offset_x) + f->width * (y - offset_y));
		vivid_tch_buf_set(f, tch_buf,
				  (x + offset_x) + f->width * (y + offset_y));
		break;
	case PALM_PRESS:
		for (x = 0; x < f->width; x++)
			for (y = f->height / 2; y < f->height; y++)
				tch_buf[x + f->width * y] = VIVID_MIN_PRESSURE +
							get_random_pressure();
		break;
	case MULTIPLE_PRESS:
		/* 16 pressure points */
		for (y = 0; y < 4; y++) {
			for (x = 0; x < 4; x++) {
				ystart = (y * f->height) / 4 + f->height / 8;
				xstart = (x * f->width) / 4 + f->width / 8;
				vivid_tch_buf_set(f, tch_buf,
						  ystart * f->width + xstart);
			}
		}
		break;
	}
#ifdef __BIG_ENDIAN__
	for (x = 0; x < size; x++)
		tch_buf[x] = (__force s16)__cpu_to_le16((u16)tch_buf[x]);
#endif
}