1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * vimc-sensor.c Virtual Media Controller Driver
4 *
5 * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
6 */
7
8 #include <linux/v4l2-mediabus.h>
9 #include <linux/vmalloc.h>
10 #include <media/v4l2-ctrls.h>
11 #include <media/v4l2-event.h>
12 #include <media/v4l2-subdev.h>
13 #include <media/tpg/v4l2-tpg.h>
14
15 #include "vimc-common.h"
16
17 enum vimc_sensor_osd_mode {
18 VIMC_SENSOR_OSD_SHOW_ALL = 0,
19 VIMC_SENSOR_OSD_SHOW_COUNTERS = 1,
20 VIMC_SENSOR_OSD_SHOW_NONE = 2
21 };
22
23 struct vimc_sensor_device {
24 struct vimc_ent_device ved;
25 struct v4l2_subdev sd;
26 struct tpg_data tpg;
27 u8 *frame;
28 enum vimc_sensor_osd_mode osd_value;
29 u64 start_stream_ts;
30 /* The active format */
31 struct v4l2_mbus_framefmt mbus_format;
32 struct v4l2_ctrl_handler hdl;
33 struct media_pad pad;
34 };
35
36 static const struct v4l2_mbus_framefmt fmt_default = {
37 .width = 640,
38 .height = 480,
39 .code = MEDIA_BUS_FMT_RGB888_1X24,
40 .field = V4L2_FIELD_NONE,
41 .colorspace = V4L2_COLORSPACE_SRGB,
42 };
43
vimc_sensor_init_cfg(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state)44 static int vimc_sensor_init_cfg(struct v4l2_subdev *sd,
45 struct v4l2_subdev_state *sd_state)
46 {
47 unsigned int i;
48
49 for (i = 0; i < sd->entity.num_pads; i++) {
50 struct v4l2_mbus_framefmt *mf;
51
52 mf = v4l2_subdev_get_try_format(sd, sd_state, i);
53 *mf = fmt_default;
54 }
55
56 return 0;
57 }
58
vimc_sensor_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)59 static int vimc_sensor_enum_mbus_code(struct v4l2_subdev *sd,
60 struct v4l2_subdev_state *sd_state,
61 struct v4l2_subdev_mbus_code_enum *code)
62 {
63 u32 mbus_code = vimc_mbus_code_by_index(code->index);
64
65 if (!mbus_code)
66 return -EINVAL;
67
68 code->code = mbus_code;
69
70 return 0;
71 }
72
vimc_sensor_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)73 static int vimc_sensor_enum_frame_size(struct v4l2_subdev *sd,
74 struct v4l2_subdev_state *sd_state,
75 struct v4l2_subdev_frame_size_enum *fse)
76 {
77 const struct vimc_pix_map *vpix;
78
79 if (fse->index)
80 return -EINVAL;
81
82 /* Only accept code in the pix map table */
83 vpix = vimc_pix_map_by_code(fse->code);
84 if (!vpix)
85 return -EINVAL;
86
87 fse->min_width = VIMC_FRAME_MIN_WIDTH;
88 fse->max_width = VIMC_FRAME_MAX_WIDTH;
89 fse->min_height = VIMC_FRAME_MIN_HEIGHT;
90 fse->max_height = VIMC_FRAME_MAX_HEIGHT;
91
92 return 0;
93 }
94
vimc_sensor_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)95 static int vimc_sensor_get_fmt(struct v4l2_subdev *sd,
96 struct v4l2_subdev_state *sd_state,
97 struct v4l2_subdev_format *fmt)
98 {
99 struct vimc_sensor_device *vsensor =
100 container_of(sd, struct vimc_sensor_device, sd);
101
102 fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
103 *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) :
104 vsensor->mbus_format;
105
106 return 0;
107 }
108
vimc_sensor_tpg_s_format(struct vimc_sensor_device * vsensor)109 static void vimc_sensor_tpg_s_format(struct vimc_sensor_device *vsensor)
110 {
111 const struct vimc_pix_map *vpix =
112 vimc_pix_map_by_code(vsensor->mbus_format.code);
113
114 tpg_reset_source(&vsensor->tpg, vsensor->mbus_format.width,
115 vsensor->mbus_format.height, vsensor->mbus_format.field);
116 tpg_s_bytesperline(&vsensor->tpg, 0, vsensor->mbus_format.width * vpix->bpp);
117 tpg_s_buf_height(&vsensor->tpg, vsensor->mbus_format.height);
118 tpg_s_fourcc(&vsensor->tpg, vpix->pixelformat);
119 /* TODO: add support for V4L2_FIELD_ALTERNATE */
120 tpg_s_field(&vsensor->tpg, vsensor->mbus_format.field, false);
121 tpg_s_colorspace(&vsensor->tpg, vsensor->mbus_format.colorspace);
122 tpg_s_ycbcr_enc(&vsensor->tpg, vsensor->mbus_format.ycbcr_enc);
123 tpg_s_quantization(&vsensor->tpg, vsensor->mbus_format.quantization);
124 tpg_s_xfer_func(&vsensor->tpg, vsensor->mbus_format.xfer_func);
125 }
126
vimc_sensor_adjust_fmt(struct v4l2_mbus_framefmt * fmt)127 static void vimc_sensor_adjust_fmt(struct v4l2_mbus_framefmt *fmt)
128 {
129 const struct vimc_pix_map *vpix;
130
131 /* Only accept code in the pix map table */
132 vpix = vimc_pix_map_by_code(fmt->code);
133 if (!vpix)
134 fmt->code = fmt_default.code;
135
136 fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
137 VIMC_FRAME_MAX_WIDTH) & ~1;
138 fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
139 VIMC_FRAME_MAX_HEIGHT) & ~1;
140
141 /* TODO: add support for V4L2_FIELD_ALTERNATE */
142 if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)
143 fmt->field = fmt_default.field;
144
145 vimc_colorimetry_clamp(fmt);
146 }
147
vimc_sensor_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)148 static int vimc_sensor_set_fmt(struct v4l2_subdev *sd,
149 struct v4l2_subdev_state *sd_state,
150 struct v4l2_subdev_format *fmt)
151 {
152 struct vimc_sensor_device *vsensor = v4l2_get_subdevdata(sd);
153 struct v4l2_mbus_framefmt *mf;
154
155 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
156 /* Do not change the format while stream is on */
157 if (vsensor->frame)
158 return -EBUSY;
159
160 mf = &vsensor->mbus_format;
161 } else {
162 mf = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
163 }
164
165 /* Set the new format */
166 vimc_sensor_adjust_fmt(&fmt->format);
167
168 dev_dbg(vsensor->ved.dev, "%s: format update: "
169 "old:%dx%d (0x%x, %d, %d, %d, %d) "
170 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsensor->sd.name,
171 /* old */
172 mf->width, mf->height, mf->code,
173 mf->colorspace, mf->quantization,
174 mf->xfer_func, mf->ycbcr_enc,
175 /* new */
176 fmt->format.width, fmt->format.height, fmt->format.code,
177 fmt->format.colorspace, fmt->format.quantization,
178 fmt->format.xfer_func, fmt->format.ycbcr_enc);
179
180 *mf = fmt->format;
181
182 return 0;
183 }
184
185 static const struct v4l2_subdev_pad_ops vimc_sensor_pad_ops = {
186 .init_cfg = vimc_sensor_init_cfg,
187 .enum_mbus_code = vimc_sensor_enum_mbus_code,
188 .enum_frame_size = vimc_sensor_enum_frame_size,
189 .get_fmt = vimc_sensor_get_fmt,
190 .set_fmt = vimc_sensor_set_fmt,
191 };
192
vimc_sensor_process_frame(struct vimc_ent_device * ved,const void * sink_frame)193 static void *vimc_sensor_process_frame(struct vimc_ent_device *ved,
194 const void *sink_frame)
195 {
196 struct vimc_sensor_device *vsensor =
197 container_of(ved, struct vimc_sensor_device, ved);
198
199 const unsigned int line_height = 16;
200 u8 *basep[TPG_MAX_PLANES][2];
201 unsigned int line = 1;
202 char str[100];
203
204 tpg_fill_plane_buffer(&vsensor->tpg, 0, 0, vsensor->frame);
205 tpg_calc_text_basep(&vsensor->tpg, basep, 0, vsensor->frame);
206 switch (vsensor->osd_value) {
207 case VIMC_SENSOR_OSD_SHOW_ALL: {
208 const char *order = tpg_g_color_order(&vsensor->tpg);
209
210 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height,
211 16, order);
212 snprintf(str, sizeof(str),
213 "brightness %3d, contrast %3d, saturation %3d, hue %d ",
214 vsensor->tpg.brightness,
215 vsensor->tpg.contrast,
216 vsensor->tpg.saturation,
217 vsensor->tpg.hue);
218 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str);
219 snprintf(str, sizeof(str), "sensor size: %dx%d",
220 vsensor->mbus_format.width,
221 vsensor->mbus_format.height);
222 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str);
223 fallthrough;
224 }
225 case VIMC_SENSOR_OSD_SHOW_COUNTERS: {
226 unsigned int ms;
227
228 ms = div_u64(ktime_get_ns() - vsensor->start_stream_ts, 1000000);
229 snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d",
230 (ms / (60 * 60 * 1000)) % 24,
231 (ms / (60 * 1000)) % 60,
232 (ms / 1000) % 60,
233 ms % 1000);
234 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str);
235 break;
236 }
237 case VIMC_SENSOR_OSD_SHOW_NONE:
238 default:
239 break;
240 }
241
242 return vsensor->frame;
243 }
244
vimc_sensor_s_stream(struct v4l2_subdev * sd,int enable)245 static int vimc_sensor_s_stream(struct v4l2_subdev *sd, int enable)
246 {
247 struct vimc_sensor_device *vsensor =
248 container_of(sd, struct vimc_sensor_device, sd);
249
250 if (enable) {
251 const struct vimc_pix_map *vpix;
252 unsigned int frame_size;
253
254 vsensor->start_stream_ts = ktime_get_ns();
255
256 /* Calculate the frame size */
257 vpix = vimc_pix_map_by_code(vsensor->mbus_format.code);
258 frame_size = vsensor->mbus_format.width * vpix->bpp *
259 vsensor->mbus_format.height;
260
261 /*
262 * Allocate the frame buffer. Use vmalloc to be able to
263 * allocate a large amount of memory
264 */
265 vsensor->frame = vmalloc(frame_size);
266 if (!vsensor->frame)
267 return -ENOMEM;
268
269 /* configure the test pattern generator */
270 vimc_sensor_tpg_s_format(vsensor);
271
272 } else {
273
274 vfree(vsensor->frame);
275 vsensor->frame = NULL;
276 }
277
278 return 0;
279 }
280
281 static const struct v4l2_subdev_core_ops vimc_sensor_core_ops = {
282 .log_status = v4l2_ctrl_subdev_log_status,
283 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
284 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
285 };
286
287 static const struct v4l2_subdev_video_ops vimc_sensor_video_ops = {
288 .s_stream = vimc_sensor_s_stream,
289 };
290
291 static const struct v4l2_subdev_ops vimc_sensor_ops = {
292 .core = &vimc_sensor_core_ops,
293 .pad = &vimc_sensor_pad_ops,
294 .video = &vimc_sensor_video_ops,
295 };
296
vimc_sensor_s_ctrl(struct v4l2_ctrl * ctrl)297 static int vimc_sensor_s_ctrl(struct v4l2_ctrl *ctrl)
298 {
299 struct vimc_sensor_device *vsensor =
300 container_of(ctrl->handler, struct vimc_sensor_device, hdl);
301
302 switch (ctrl->id) {
303 case VIMC_CID_TEST_PATTERN:
304 tpg_s_pattern(&vsensor->tpg, ctrl->val);
305 break;
306 case V4L2_CID_HFLIP:
307 tpg_s_hflip(&vsensor->tpg, ctrl->val);
308 break;
309 case V4L2_CID_VFLIP:
310 tpg_s_vflip(&vsensor->tpg, ctrl->val);
311 break;
312 case V4L2_CID_BRIGHTNESS:
313 tpg_s_brightness(&vsensor->tpg, ctrl->val);
314 break;
315 case V4L2_CID_CONTRAST:
316 tpg_s_contrast(&vsensor->tpg, ctrl->val);
317 break;
318 case V4L2_CID_HUE:
319 tpg_s_hue(&vsensor->tpg, ctrl->val);
320 break;
321 case V4L2_CID_SATURATION:
322 tpg_s_saturation(&vsensor->tpg, ctrl->val);
323 break;
324 case VIMC_CID_OSD_TEXT_MODE:
325 vsensor->osd_value = ctrl->val;
326 break;
327 default:
328 return -EINVAL;
329 }
330 return 0;
331 }
332
333 static const struct v4l2_ctrl_ops vimc_sensor_ctrl_ops = {
334 .s_ctrl = vimc_sensor_s_ctrl,
335 };
336
vimc_sensor_release(struct vimc_ent_device * ved)337 static void vimc_sensor_release(struct vimc_ent_device *ved)
338 {
339 struct vimc_sensor_device *vsensor =
340 container_of(ved, struct vimc_sensor_device, ved);
341
342 v4l2_ctrl_handler_free(&vsensor->hdl);
343 tpg_free(&vsensor->tpg);
344 media_entity_cleanup(vsensor->ved.ent);
345 kfree(vsensor);
346 }
347
348 /* Image Processing Controls */
349 static const struct v4l2_ctrl_config vimc_sensor_ctrl_class = {
350 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
351 .id = VIMC_CID_VIMC_CLASS,
352 .name = "VIMC Controls",
353 .type = V4L2_CTRL_TYPE_CTRL_CLASS,
354 };
355
356 static const struct v4l2_ctrl_config vimc_sensor_ctrl_test_pattern = {
357 .ops = &vimc_sensor_ctrl_ops,
358 .id = VIMC_CID_TEST_PATTERN,
359 .name = "Test Pattern",
360 .type = V4L2_CTRL_TYPE_MENU,
361 .max = TPG_PAT_NOISE,
362 .qmenu = tpg_pattern_strings,
363 };
364
365 static const char * const vimc_ctrl_osd_mode_strings[] = {
366 "All",
367 "Counters Only",
368 "None",
369 NULL,
370 };
371
372 static const struct v4l2_ctrl_config vimc_sensor_ctrl_osd_mode = {
373 .ops = &vimc_sensor_ctrl_ops,
374 .id = VIMC_CID_OSD_TEXT_MODE,
375 .name = "Show Information",
376 .type = V4L2_CTRL_TYPE_MENU,
377 .max = ARRAY_SIZE(vimc_ctrl_osd_mode_strings) - 2,
378 .qmenu = vimc_ctrl_osd_mode_strings,
379 };
380
vimc_sensor_add(struct vimc_device * vimc,const char * vcfg_name)381 static struct vimc_ent_device *vimc_sensor_add(struct vimc_device *vimc,
382 const char *vcfg_name)
383 {
384 struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;
385 struct vimc_sensor_device *vsensor;
386 int ret;
387
388 /* Allocate the vsensor struct */
389 vsensor = kzalloc(sizeof(*vsensor), GFP_KERNEL);
390 if (!vsensor)
391 return ERR_PTR(-ENOMEM);
392
393 v4l2_ctrl_handler_init(&vsensor->hdl, 4);
394
395 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_class, NULL);
396 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_test_pattern, NULL);
397 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_osd_mode, NULL);
398 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,
399 V4L2_CID_VFLIP, 0, 1, 1, 0);
400 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,
401 V4L2_CID_HFLIP, 0, 1, 1, 0);
402 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,
403 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
404 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,
405 V4L2_CID_CONTRAST, 0, 255, 1, 128);
406 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,
407 V4L2_CID_HUE, -128, 127, 1, 0);
408 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,
409 V4L2_CID_SATURATION, 0, 255, 1, 128);
410 vsensor->sd.ctrl_handler = &vsensor->hdl;
411 if (vsensor->hdl.error) {
412 ret = vsensor->hdl.error;
413 goto err_free_vsensor;
414 }
415
416 /* Initialize the test pattern generator */
417 tpg_init(&vsensor->tpg, vsensor->mbus_format.width,
418 vsensor->mbus_format.height);
419 ret = tpg_alloc(&vsensor->tpg, VIMC_FRAME_MAX_WIDTH);
420 if (ret)
421 goto err_free_hdl;
422
423 /* Initialize ved and sd */
424 vsensor->pad.flags = MEDIA_PAD_FL_SOURCE;
425 ret = vimc_ent_sd_register(&vsensor->ved, &vsensor->sd, v4l2_dev,
426 vcfg_name,
427 MEDIA_ENT_F_CAM_SENSOR, 1, &vsensor->pad,
428 &vimc_sensor_ops);
429 if (ret)
430 goto err_free_tpg;
431
432 vsensor->ved.process_frame = vimc_sensor_process_frame;
433 vsensor->ved.dev = vimc->mdev.dev;
434
435 /* Initialize the frame format */
436 vsensor->mbus_format = fmt_default;
437
438 return &vsensor->ved;
439
440 err_free_tpg:
441 tpg_free(&vsensor->tpg);
442 err_free_hdl:
443 v4l2_ctrl_handler_free(&vsensor->hdl);
444 err_free_vsensor:
445 kfree(vsensor);
446
447 return ERR_PTR(ret);
448 }
449
450 struct vimc_ent_type vimc_sensor_type = {
451 .add = vimc_sensor_add,
452 .release = vimc_sensor_release
453 };
454