summaryrefslogtreecommitdiffstats
path: root/drivers/staging/media/starfive/camss/stf-isp.c
blob: 4e6e267368527e232e2508dd5fc2ac2cf913986d (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
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
// SPDX-License-Identifier: GPL-2.0
/*
 * stf_isp.c
 *
 * StarFive Camera Subsystem - ISP Module
 *
 * Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
 */
#include <media/v4l2-rect.h>

#include "stf-camss.h"

static int isp_set_selection(struct v4l2_subdev *sd,
			     struct v4l2_subdev_state *state,
			     struct v4l2_subdev_selection *sel);

static const struct stf_isp_format isp_formats_sink[] = {
	{ MEDIA_BUS_FMT_SRGGB10_1X10, 10 },
	{ MEDIA_BUS_FMT_SGRBG10_1X10, 10 },
	{ MEDIA_BUS_FMT_SGBRG10_1X10, 10 },
	{ MEDIA_BUS_FMT_SBGGR10_1X10, 10 },
};

static const struct stf_isp_format isp_formats_source[] = {
	{ MEDIA_BUS_FMT_YUYV8_1_5X8, 8 },
};

static const struct stf_isp_format_table isp_formats_st7110[] = {
	{ isp_formats_sink, ARRAY_SIZE(isp_formats_sink) },
	{ isp_formats_source, ARRAY_SIZE(isp_formats_source) },
};

static const struct stf_isp_format *
stf_g_fmt_by_mcode(const struct stf_isp_format_table *fmt_table, u32 mcode)
{
	unsigned int i;

	for (i = 0; i < fmt_table->nfmts; i++) {
		if (fmt_table->fmts[i].code == mcode)
			return &fmt_table->fmts[i];
	}

	return NULL;
}

int stf_isp_init(struct stfcamss *stfcamss)
{
	struct stf_isp_dev *isp_dev = &stfcamss->isp_dev;

	isp_dev->stfcamss = stfcamss;
	isp_dev->formats = isp_formats_st7110;
	isp_dev->nformats = ARRAY_SIZE(isp_formats_st7110);
	isp_dev->current_fmt = &isp_formats_source[0];

	return 0;
}

static int isp_set_stream(struct v4l2_subdev *sd, int enable)
{
	struct stf_isp_dev *isp_dev = v4l2_get_subdevdata(sd);
	struct v4l2_subdev_state *sd_state;
	struct v4l2_mbus_framefmt *fmt;
	struct v4l2_rect *crop;

	sd_state = v4l2_subdev_lock_and_get_active_state(sd);
	fmt = v4l2_subdev_state_get_format(sd_state, STF_ISP_PAD_SINK);
	crop = v4l2_subdev_state_get_crop(sd_state, STF_ISP_PAD_SRC);

	if (enable) {
		stf_isp_reset(isp_dev);
		stf_isp_init_cfg(isp_dev);
		stf_isp_settings(isp_dev, crop, fmt->code);
		stf_isp_stream_set(isp_dev);
	}

	v4l2_subdev_call(isp_dev->source_subdev, video, s_stream, enable);

	v4l2_subdev_unlock_state(sd_state);
	return 0;
}

static void isp_try_format(struct stf_isp_dev *isp_dev,
			   struct v4l2_subdev_state *state,
			   unsigned int pad,
			   struct v4l2_mbus_framefmt *fmt)
{
	const struct stf_isp_format_table *formats;

	if (pad >= STF_ISP_PAD_MAX) {
		fmt->colorspace = V4L2_COLORSPACE_SRGB;
		return;
	}

	formats = &isp_dev->formats[pad];

	fmt->width = clamp_t(u32, fmt->width, STFCAMSS_FRAME_MIN_WIDTH,
			     STFCAMSS_FRAME_MAX_WIDTH);
	fmt->height = clamp_t(u32, fmt->height, STFCAMSS_FRAME_MIN_HEIGHT,
			      STFCAMSS_FRAME_MAX_HEIGHT);
	fmt->height &= ~0x1;
	fmt->field = V4L2_FIELD_NONE;
	fmt->colorspace = V4L2_COLORSPACE_SRGB;
	fmt->flags = 0;

	if (!stf_g_fmt_by_mcode(formats, fmt->code))
		fmt->code = formats->fmts[0].code;
}

static int isp_enum_mbus_code(struct v4l2_subdev *sd,
			      struct v4l2_subdev_state *state,
			      struct v4l2_subdev_mbus_code_enum *code)
{
	struct stf_isp_dev *isp_dev = v4l2_get_subdevdata(sd);
	const struct stf_isp_format_table *formats;

	if (code->pad == STF_ISP_PAD_SINK) {
		if (code->index >= ARRAY_SIZE(isp_formats_sink))
			return -EINVAL;

		formats = &isp_dev->formats[code->pad];
		code->code = formats->fmts[code->index].code;
	} else {
		struct v4l2_mbus_framefmt *sink_fmt;

		if (code->index >= ARRAY_SIZE(isp_formats_source))
			return -EINVAL;

		sink_fmt = v4l2_subdev_state_get_format(state,
							STF_ISP_PAD_SRC);

		code->code = sink_fmt->code;
		if (!code->code)
			return -EINVAL;
	}
	code->flags = 0;

	return 0;
}

static int isp_set_format(struct v4l2_subdev *sd,
			  struct v4l2_subdev_state *state,
			  struct v4l2_subdev_format *fmt)
{
	struct stf_isp_dev *isp_dev = v4l2_get_subdevdata(sd);
	struct v4l2_mbus_framefmt *format;

	format = v4l2_subdev_state_get_format(state, fmt->pad);
	if (!format)
		return -EINVAL;

	isp_try_format(isp_dev, state, fmt->pad, &fmt->format);
	*format = fmt->format;

	isp_dev->current_fmt = stf_g_fmt_by_mcode(&isp_dev->formats[fmt->pad],
						  fmt->format.code);

	/* Propagate to in crop */
	if (fmt->pad == STF_ISP_PAD_SINK) {
		struct v4l2_subdev_selection sel = { 0 };

		/* Reset sink pad compose selection */
		sel.which = fmt->which;
		sel.pad = STF_ISP_PAD_SINK;
		sel.target = V4L2_SEL_TGT_CROP;
		sel.r.width = fmt->format.width;
		sel.r.height = fmt->format.height;
		isp_set_selection(sd, state, &sel);
	}

	return 0;
}

static const struct v4l2_rect stf_frame_min_crop = {
	.width = STFCAMSS_FRAME_MIN_WIDTH,
	.height = STFCAMSS_FRAME_MIN_HEIGHT,
	.top = 0,
	.left = 0,
};

static void isp_try_crop(struct stf_isp_dev *isp_dev,
			 struct v4l2_subdev_state *state,
			 struct v4l2_rect *crop)
{
	struct v4l2_mbus_framefmt *fmt =
		v4l2_subdev_state_get_format(state, STF_ISP_PAD_SINK);

	const struct v4l2_rect bounds = {
		.width = fmt->width,
		.height = fmt->height,
		.left = 0,
		.top = 0,
	};

	v4l2_rect_set_min_size(crop, &stf_frame_min_crop);
	v4l2_rect_map_inside(crop, &bounds);
}

static int isp_get_selection(struct v4l2_subdev *sd,
			     struct v4l2_subdev_state *state,
			     struct v4l2_subdev_selection *sel)
{
	struct v4l2_subdev_format fmt = { 0 };
	struct v4l2_rect *rect;

	switch (sel->target) {
	case V4L2_SEL_TGT_CROP_BOUNDS:
		if (sel->pad == STF_ISP_PAD_SINK) {
			fmt.format = *v4l2_subdev_state_get_format(state,
								   sel->pad);
			sel->r.left = 0;
			sel->r.top = 0;
			sel->r.width = fmt.format.width;
			sel->r.height = fmt.format.height;
		} else if (sel->pad == STF_ISP_PAD_SRC) {
			rect = v4l2_subdev_state_get_crop(state, sel->pad);
			sel->r = *rect;
		}
		break;

	case V4L2_SEL_TGT_CROP:
		rect = v4l2_subdev_state_get_crop(state, sel->pad);
		if (!rect)
			return -EINVAL;

		sel->r = *rect;
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int isp_set_selection(struct v4l2_subdev *sd,
			     struct v4l2_subdev_state *state,
			     struct v4l2_subdev_selection *sel)
{
	struct stf_isp_dev *isp_dev = v4l2_get_subdevdata(sd);
	struct v4l2_rect *rect;

	if (sel->target != V4L2_SEL_TGT_CROP)
		return -EINVAL;

	if (sel->target == V4L2_SEL_TGT_CROP &&
	    sel->pad == STF_ISP_PAD_SINK) {
		struct v4l2_subdev_selection crop = { 0 };

		rect = v4l2_subdev_state_get_crop(state, sel->pad);
		if (!rect)
			return -EINVAL;

		isp_try_crop(isp_dev, state, &sel->r);
		*rect = sel->r;

		/* Reset source crop selection */
		crop.which = sel->which;
		crop.pad = STF_ISP_PAD_SRC;
		crop.target = V4L2_SEL_TGT_CROP;
		crop.r = *rect;
		isp_set_selection(sd, state, &crop);
	} else if (sel->target == V4L2_SEL_TGT_CROP &&
		   sel->pad == STF_ISP_PAD_SRC) {
		struct v4l2_subdev_format fmt = { 0 };

		rect = v4l2_subdev_state_get_crop(state, sel->pad);
		if (!rect)
			return -EINVAL;

		isp_try_crop(isp_dev, state, &sel->r);
		*rect = sel->r;

		/* Reset source pad format width and height */
		fmt.which = sel->which;
		fmt.pad = STF_ISP_PAD_SRC;
		fmt.format.width = rect->width;
		fmt.format.height = rect->height;
		isp_set_format(sd, state, &fmt);
	}

	dev_dbg(isp_dev->stfcamss->dev, "pad: %d sel(%d,%d)/%dx%d\n",
		sel->pad, sel->r.left, sel->r.top, sel->r.width, sel->r.height);

	return 0;
}

static int isp_init_formats(struct v4l2_subdev *sd,
			    struct v4l2_subdev_state *sd_state)
{
	struct v4l2_subdev_format format = {
		.pad = STF_ISP_PAD_SINK,
		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
		.format = {
			.code = MEDIA_BUS_FMT_SRGGB10_1X10,
			.width = 1920,
			.height = 1080
		}
	};

	return isp_set_format(sd, sd_state, &format);
}

static const struct v4l2_subdev_video_ops isp_video_ops = {
	.s_stream = isp_set_stream,
};

static const struct v4l2_subdev_pad_ops isp_pad_ops = {
	.enum_mbus_code = isp_enum_mbus_code,
	.get_fmt = v4l2_subdev_get_fmt,
	.set_fmt = isp_set_format,
	.get_selection = isp_get_selection,
	.set_selection = isp_set_selection,
};

static const struct v4l2_subdev_ops isp_v4l2_ops = {
	.video = &isp_video_ops,
	.pad = &isp_pad_ops,
};

static const struct v4l2_subdev_internal_ops isp_internal_ops = {
	.init_state = isp_init_formats,
};

static const struct media_entity_operations isp_media_ops = {
	.link_validate = v4l2_subdev_link_validate,
};

int stf_isp_register(struct stf_isp_dev *isp_dev, struct v4l2_device *v4l2_dev)
{
	struct v4l2_subdev *sd = &isp_dev->subdev;
	struct media_pad *pads = isp_dev->pads;
	int ret;

	v4l2_subdev_init(sd, &isp_v4l2_ops);
	sd->internal_ops = &isp_internal_ops;
	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
	snprintf(sd->name, ARRAY_SIZE(sd->name), "stf_isp");
	v4l2_set_subdevdata(sd, isp_dev);

	pads[STF_ISP_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
	pads[STF_ISP_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;

	sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_ISP;
	sd->entity.ops = &isp_media_ops;
	ret = media_entity_pads_init(&sd->entity, STF_ISP_PAD_MAX, pads);
	if (ret) {
		dev_err(isp_dev->stfcamss->dev,
			"Failed to init media entity: %d\n", ret);
		return ret;
	}

	ret = v4l2_subdev_init_finalize(sd);
	if (ret)
		goto err_entity_cleanup;

	ret = v4l2_device_register_subdev(v4l2_dev, sd);
	if (ret) {
		dev_err(isp_dev->stfcamss->dev,
			"Failed to register subdev: %d\n", ret);
		goto err_subdev_cleanup;
	}

	return 0;

err_subdev_cleanup:
	v4l2_subdev_cleanup(sd);
err_entity_cleanup:
	media_entity_cleanup(&sd->entity);
	return ret;
}

int stf_isp_unregister(struct stf_isp_dev *isp_dev)
{
	v4l2_device_unregister_subdev(&isp_dev->subdev);
	v4l2_subdev_cleanup(&isp_dev->subdev);
	media_entity_cleanup(&isp_dev->subdev.entity);

	return 0;
}