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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * vimc-sensor.c Virtual Media Controller Driver4 *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 17enum vimc_sensor_osd_mode {18 VIMC_SENSOR_OSD_SHOW_ALL = 0,19 VIMC_SENSOR_OSD_SHOW_COUNTERS = 1,20 VIMC_SENSOR_OSD_SHOW_NONE = 221};22 23struct vimc_sensor_device {24 struct vimc_ent_device ved;25 struct v4l2_subdev sd;26 struct tpg_data tpg;27 struct v4l2_ctrl_handler hdl;28 struct media_pad pad;29 30 u8 *frame;31 32 /*33 * Virtual "hardware" configuration, filled when the stream starts or34 * when controls are set.35 */36 struct {37 struct v4l2_area size;38 enum vimc_sensor_osd_mode osd_value;39 u64 start_stream_ts;40 } hw;41};42 43static const struct v4l2_mbus_framefmt fmt_default = {44 .width = 640,45 .height = 480,46 .code = MEDIA_BUS_FMT_RGB888_1X24,47 .field = V4L2_FIELD_NONE,48 .colorspace = V4L2_COLORSPACE_SRGB,49};50 51static int vimc_sensor_init_state(struct v4l2_subdev *sd,52 struct v4l2_subdev_state *sd_state)53{54 struct v4l2_mbus_framefmt *mf;55 56 mf = v4l2_subdev_state_get_format(sd_state, 0);57 *mf = fmt_default;58 59 return 0;60}61 62static int vimc_sensor_enum_mbus_code(struct v4l2_subdev *sd,63 struct v4l2_subdev_state *sd_state,64 struct v4l2_subdev_mbus_code_enum *code)65{66 u32 mbus_code = vimc_mbus_code_by_index(code->index);67 68 if (!mbus_code)69 return -EINVAL;70 71 code->code = mbus_code;72 73 return 0;74}75 76static int vimc_sensor_enum_frame_size(struct v4l2_subdev *sd,77 struct v4l2_subdev_state *sd_state,78 struct v4l2_subdev_frame_size_enum *fse)79{80 const struct vimc_pix_map *vpix;81 82 if (fse->index)83 return -EINVAL;84 85 /* Only accept code in the pix map table */86 vpix = vimc_pix_map_by_code(fse->code);87 if (!vpix)88 return -EINVAL;89 90 fse->min_width = VIMC_FRAME_MIN_WIDTH;91 fse->max_width = VIMC_FRAME_MAX_WIDTH;92 fse->min_height = VIMC_FRAME_MIN_HEIGHT;93 fse->max_height = VIMC_FRAME_MAX_HEIGHT;94 95 return 0;96}97 98static void vimc_sensor_tpg_s_format(struct vimc_sensor_device *vsensor,99 const struct v4l2_mbus_framefmt *format)100{101 const struct vimc_pix_map *vpix = vimc_pix_map_by_code(format->code);102 103 tpg_reset_source(&vsensor->tpg, format->width, format->height,104 format->field);105 tpg_s_bytesperline(&vsensor->tpg, 0, format->width * vpix->bpp);106 tpg_s_buf_height(&vsensor->tpg, format->height);107 tpg_s_fourcc(&vsensor->tpg, vpix->pixelformat);108 /* TODO: add support for V4L2_FIELD_ALTERNATE */109 tpg_s_field(&vsensor->tpg, format->field, false);110 tpg_s_colorspace(&vsensor->tpg, format->colorspace);111 tpg_s_ycbcr_enc(&vsensor->tpg, format->ycbcr_enc);112 tpg_s_quantization(&vsensor->tpg, format->quantization);113 tpg_s_xfer_func(&vsensor->tpg, format->xfer_func);114}115 116static void vimc_sensor_adjust_fmt(struct v4l2_mbus_framefmt *fmt)117{118 const struct vimc_pix_map *vpix;119 120 /* Only accept code in the pix map table */121 vpix = vimc_pix_map_by_code(fmt->code);122 if (!vpix)123 fmt->code = fmt_default.code;124 125 fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,126 VIMC_FRAME_MAX_WIDTH) & ~1;127 fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,128 VIMC_FRAME_MAX_HEIGHT) & ~1;129 130 /* TODO: add support for V4L2_FIELD_ALTERNATE */131 if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)132 fmt->field = fmt_default.field;133 134 vimc_colorimetry_clamp(fmt);135}136 137static int vimc_sensor_set_fmt(struct v4l2_subdev *sd,138 struct v4l2_subdev_state *sd_state,139 struct v4l2_subdev_format *fmt)140{141 struct vimc_sensor_device *vsensor = v4l2_get_subdevdata(sd);142 struct v4l2_mbus_framefmt *mf;143 144 /* Do not change the format while stream is on */145 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE && vsensor->frame)146 return -EBUSY;147 148 mf = v4l2_subdev_state_get_format(sd_state, fmt->pad);149 150 /* Set the new format */151 vimc_sensor_adjust_fmt(&fmt->format);152 153 dev_dbg(vsensor->ved.dev, "%s: format update: "154 "old:%dx%d (0x%x, %d, %d, %d, %d) "155 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsensor->sd.name,156 /* old */157 mf->width, mf->height, mf->code,158 mf->colorspace, mf->quantization,159 mf->xfer_func, mf->ycbcr_enc,160 /* new */161 fmt->format.width, fmt->format.height, fmt->format.code,162 fmt->format.colorspace, fmt->format.quantization,163 fmt->format.xfer_func, fmt->format.ycbcr_enc);164 165 *mf = fmt->format;166 167 return 0;168}169 170static const struct v4l2_subdev_pad_ops vimc_sensor_pad_ops = {171 .enum_mbus_code = vimc_sensor_enum_mbus_code,172 .enum_frame_size = vimc_sensor_enum_frame_size,173 .get_fmt = v4l2_subdev_get_fmt,174 .set_fmt = vimc_sensor_set_fmt,175};176 177static void *vimc_sensor_process_frame(struct vimc_ent_device *ved,178 const void *sink_frame)179{180 struct vimc_sensor_device *vsensor =181 container_of(ved, struct vimc_sensor_device, ved);182 183 const unsigned int line_height = 16;184 u8 *basep[TPG_MAX_PLANES][2];185 unsigned int line = 1;186 char str[100];187 188 tpg_fill_plane_buffer(&vsensor->tpg, 0, 0, vsensor->frame);189 tpg_calc_text_basep(&vsensor->tpg, basep, 0, vsensor->frame);190 switch (vsensor->hw.osd_value) {191 case VIMC_SENSOR_OSD_SHOW_ALL: {192 const char *order = tpg_g_color_order(&vsensor->tpg);193 194 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height,195 16, order);196 snprintf(str, sizeof(str),197 "brightness %3d, contrast %3d, saturation %3d, hue %d ",198 vsensor->tpg.brightness,199 vsensor->tpg.contrast,200 vsensor->tpg.saturation,201 vsensor->tpg.hue);202 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str);203 snprintf(str, sizeof(str), "sensor size: %dx%d",204 vsensor->hw.size.width, vsensor->hw.size.height);205 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str);206 fallthrough;207 }208 case VIMC_SENSOR_OSD_SHOW_COUNTERS: {209 unsigned int ms;210 211 ms = div_u64(ktime_get_ns() - vsensor->hw.start_stream_ts, 1000000);212 snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d",213 (ms / (60 * 60 * 1000)) % 24,214 (ms / (60 * 1000)) % 60,215 (ms / 1000) % 60,216 ms % 1000);217 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str);218 break;219 }220 case VIMC_SENSOR_OSD_SHOW_NONE:221 default:222 break;223 }224 225 return vsensor->frame;226}227 228static int vimc_sensor_s_stream(struct v4l2_subdev *sd, int enable)229{230 struct vimc_sensor_device *vsensor =231 container_of(sd, struct vimc_sensor_device, sd);232 233 if (enable) {234 const struct v4l2_mbus_framefmt *format;235 struct v4l2_subdev_state *state;236 const struct vimc_pix_map *vpix;237 unsigned int frame_size;238 239 state = v4l2_subdev_lock_and_get_active_state(sd);240 format = v4l2_subdev_state_get_format(state, 0);241 242 /* Configure the test pattern generator. */243 vimc_sensor_tpg_s_format(vsensor, format);244 245 /* Calculate the frame size. */246 vpix = vimc_pix_map_by_code(format->code);247 frame_size = format->width * vpix->bpp * format->height;248 249 vsensor->hw.size.width = format->width;250 vsensor->hw.size.height = format->height;251 252 v4l2_subdev_unlock_state(state);253 254 /*255 * Allocate the frame buffer. Use vmalloc to be able to256 * allocate a large amount of memory257 */258 vsensor->frame = vmalloc(frame_size);259 if (!vsensor->frame)260 return -ENOMEM;261 262 vsensor->hw.start_stream_ts = ktime_get_ns();263 } else {264 265 vfree(vsensor->frame);266 vsensor->frame = NULL;267 }268 269 return 0;270}271 272static const struct v4l2_subdev_core_ops vimc_sensor_core_ops = {273 .log_status = v4l2_ctrl_subdev_log_status,274 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,275 .unsubscribe_event = v4l2_event_subdev_unsubscribe,276};277 278static const struct v4l2_subdev_video_ops vimc_sensor_video_ops = {279 .s_stream = vimc_sensor_s_stream,280};281 282static const struct v4l2_subdev_ops vimc_sensor_ops = {283 .core = &vimc_sensor_core_ops,284 .pad = &vimc_sensor_pad_ops,285 .video = &vimc_sensor_video_ops,286};287 288static const struct v4l2_subdev_internal_ops vimc_sensor_internal_ops = {289 .init_state = vimc_sensor_init_state,290};291 292static int vimc_sensor_s_ctrl(struct v4l2_ctrl *ctrl)293{294 struct vimc_sensor_device *vsensor =295 container_of(ctrl->handler, struct vimc_sensor_device, hdl);296 297 switch (ctrl->id) {298 case VIMC_CID_TEST_PATTERN:299 tpg_s_pattern(&vsensor->tpg, ctrl->val);300 break;301 case V4L2_CID_HFLIP:302 tpg_s_hflip(&vsensor->tpg, ctrl->val);303 break;304 case V4L2_CID_VFLIP:305 tpg_s_vflip(&vsensor->tpg, ctrl->val);306 break;307 case V4L2_CID_BRIGHTNESS:308 tpg_s_brightness(&vsensor->tpg, ctrl->val);309 break;310 case V4L2_CID_CONTRAST:311 tpg_s_contrast(&vsensor->tpg, ctrl->val);312 break;313 case V4L2_CID_HUE:314 tpg_s_hue(&vsensor->tpg, ctrl->val);315 break;316 case V4L2_CID_SATURATION:317 tpg_s_saturation(&vsensor->tpg, ctrl->val);318 break;319 case VIMC_CID_OSD_TEXT_MODE:320 vsensor->hw.osd_value = ctrl->val;321 break;322 default:323 return -EINVAL;324 }325 return 0;326}327 328static const struct v4l2_ctrl_ops vimc_sensor_ctrl_ops = {329 .s_ctrl = vimc_sensor_s_ctrl,330};331 332static void vimc_sensor_release(struct vimc_ent_device *ved)333{334 struct vimc_sensor_device *vsensor =335 container_of(ved, struct vimc_sensor_device, ved);336 337 v4l2_ctrl_handler_free(&vsensor->hdl);338 tpg_free(&vsensor->tpg);339 v4l2_subdev_cleanup(&vsensor->sd);340 media_entity_cleanup(vsensor->ved.ent);341 kfree(vsensor);342}343 344/* Image Processing Controls */345static const struct v4l2_ctrl_config vimc_sensor_ctrl_class = {346 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,347 .id = VIMC_CID_VIMC_CLASS,348 .name = "VIMC Controls",349 .type = V4L2_CTRL_TYPE_CTRL_CLASS,350};351 352static const struct v4l2_ctrl_config vimc_sensor_ctrl_test_pattern = {353 .ops = &vimc_sensor_ctrl_ops,354 .id = VIMC_CID_TEST_PATTERN,355 .name = "Test Pattern",356 .type = V4L2_CTRL_TYPE_MENU,357 .max = TPG_PAT_NOISE,358 .qmenu = tpg_pattern_strings,359};360 361static const char * const vimc_ctrl_osd_mode_strings[] = {362 "All",363 "Counters Only",364 "None",365 NULL,366};367 368static const struct v4l2_ctrl_config vimc_sensor_ctrl_osd_mode = {369 .ops = &vimc_sensor_ctrl_ops,370 .id = VIMC_CID_OSD_TEXT_MODE,371 .name = "Show Information",372 .type = V4L2_CTRL_TYPE_MENU,373 .max = ARRAY_SIZE(vimc_ctrl_osd_mode_strings) - 2,374 .qmenu = vimc_ctrl_osd_mode_strings,375};376 377static struct vimc_ent_device *vimc_sensor_add(struct vimc_device *vimc,378 const char *vcfg_name)379{380 struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;381 struct vimc_sensor_device *vsensor;382 int ret;383 384 /* Allocate the vsensor struct */385 vsensor = kzalloc(sizeof(*vsensor), GFP_KERNEL);386 if (!vsensor)387 return ERR_PTR(-ENOMEM);388 389 v4l2_ctrl_handler_init(&vsensor->hdl, 4);390 391 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_class, NULL);392 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_test_pattern, NULL);393 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_osd_mode, NULL);394 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,395 V4L2_CID_VFLIP, 0, 1, 1, 0);396 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,397 V4L2_CID_HFLIP, 0, 1, 1, 0);398 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,399 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);400 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,401 V4L2_CID_CONTRAST, 0, 255, 1, 128);402 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,403 V4L2_CID_HUE, -128, 127, 1, 0);404 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,405 V4L2_CID_SATURATION, 0, 255, 1, 128);406 vsensor->sd.ctrl_handler = &vsensor->hdl;407 if (vsensor->hdl.error) {408 ret = vsensor->hdl.error;409 goto err_free_vsensor;410 }411 412 /* Initialize the test pattern generator */413 tpg_init(&vsensor->tpg, fmt_default.width, fmt_default.height);414 ret = tpg_alloc(&vsensor->tpg, VIMC_FRAME_MAX_WIDTH);415 if (ret)416 goto err_free_hdl;417 418 /* Initialize ved and sd */419 vsensor->pad.flags = MEDIA_PAD_FL_SOURCE;420 ret = vimc_ent_sd_register(&vsensor->ved, &vsensor->sd, v4l2_dev,421 vcfg_name,422 MEDIA_ENT_F_CAM_SENSOR, 1, &vsensor->pad,423 &vimc_sensor_internal_ops, &vimc_sensor_ops);424 if (ret)425 goto err_free_tpg;426 427 vsensor->ved.process_frame = vimc_sensor_process_frame;428 vsensor->ved.dev = vimc->mdev.dev;429 430 return &vsensor->ved;431 432err_free_tpg:433 tpg_free(&vsensor->tpg);434err_free_hdl:435 v4l2_ctrl_handler_free(&vsensor->hdl);436err_free_vsensor:437 kfree(vsensor);438 439 return ERR_PTR(ret);440}441 442const struct vimc_ent_type vimc_sensor_type = {443 .add = vimc_sensor_add,444 .release = vimc_sensor_release445};446