// SPDX-License-Identifier: GPL-2.0-or-later/* * vimc-sensor.c Virtual Media Controller Driver * * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com> */ #include <linux/v4l2-mediabus.h>#include <linux/vmalloc.h>#include <media/v4l2-ctrls.h>#include <media/v4l2-event.h>#include <media/v4l2-subdev.h>#include <media/tpg/v4l2-tpg.h> #include "vimc-common.h" static const struct v4l2_mbus_framefmt fmt_default = {	.width = 640,	.height = 480,	.code = MEDIA_BUS_FMT_RGB888_1X24,	.field = V4L2_FIELD_NONE,	.colorspace = V4L2_COLORSPACE_SRGB,}; static int vimc_sensor_init_state(struct v4l2_subdev *sd,				  struct v4l2_subdev_state *sd_state){	struct vimc_sensor_device *vsensor =		container_of(sd, struct vimc_sensor_device, sd); 	struct v4l2_mbus_framefmt *mf; 	mf = v4l2_subdev_state_get_format(sd_state, 0);	*mf = fmt_default;	vsensor->hw.size.width = fmt_default.width;	vsensor->hw.size.height = fmt_default.height; 	return 0;} static int vimc_sensor_enum_mbus_code(struct v4l2_subdev *sd,				      struct v4l2_subdev_state *sd_state,				      struct v4l2_subdev_mbus_code_enum *code){	u32 mbus_code = vimc_mbus_code_by_index(code->index); 	if (!mbus_code)		return -EINVAL; 	code->code = mbus_code; 	return 0;} static int vimc_sensor_enum_frame_size(struct v4l2_subdev *sd,				       struct v4l2_subdev_state *sd_state,				       struct v4l2_subdev_frame_size_enum *fse){	const struct vimc_pix_map *vpix; 	if (fse->index)		return -EINVAL; 	/* Only accept code in the pix map table */	vpix = vimc_pix_map_by_code(fse->code);	if (!vpix)		return -EINVAL; 	fse->min_width = VIMC_FRAME_MIN_WIDTH;	fse->max_width = VIMC_FRAME_MAX_WIDTH;	fse->min_height = VIMC_FRAME_MIN_HEIGHT;	fse->max_height = VIMC_FRAME_MAX_HEIGHT; 	return 0;} static void vimc_sensor_tpg_s_format(struct vimc_sensor_device *vsensor,				     const struct v4l2_mbus_framefmt *format){	const struct vimc_pix_map *vpix = vimc_pix_map_by_code(format->code); 	tpg_reset_source(&vsensor->tpg, format->width, format->height,			 format->field);	tpg_s_bytesperline(&vsensor->tpg, 0, format->width * vpix->bpp);	tpg_s_buf_height(&vsensor->tpg, format->height);	tpg_s_fourcc(&vsensor->tpg, vpix->pixelformat);	/* TODO: add support for V4L2_FIELD_ALTERNATE */	tpg_s_field(&vsensor->tpg, format->field, false);	tpg_s_colorspace(&vsensor->tpg, format->colorspace);	tpg_s_ycbcr_enc(&vsensor->tpg, format->ycbcr_enc);	tpg_s_quantization(&vsensor->tpg, format->quantization);	tpg_s_xfer_func(&vsensor->tpg, format->xfer_func);} static void vimc_sensor_update_frame_timing(struct v4l2_subdev *sd,					    u32 width, u32 height){	struct vimc_sensor_device *vsensor =		container_of(sd, struct vimc_sensor_device, sd);	u64 pixel_rate = vsensor->pixel_rate->val;	u32 hts = width + vsensor->hblank->val;	u32 vts = height + vsensor->vblank->val;	u64 total_pixels = (u64)hts * vts;	u64 frame_interval_ns; 	/* Sanity check, pixel rate is fixed and fits in 32 bits. */	if (WARN_ON(pixel_rate >= 0x100000000))		return; 	frame_interval_ns = total_pixels * NSEC_PER_SEC;	do_div(frame_interval_ns, (u32)pixel_rate);	vsensor->hw.fps_jiffies = nsecs_to_jiffies(frame_interval_ns);	if (vsensor->hw.fps_jiffies == 0)		vsensor->hw.fps_jiffies = 1;} static void vimc_sensor_adjust_fmt(struct v4l2_mbus_framefmt *fmt){	const struct vimc_pix_map *vpix; 	/* Only accept code in the pix map table */	vpix = vimc_pix_map_by_code(fmt->code);	if (!vpix)		fmt->code = fmt_default.code; 	fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,			     VIMC_FRAME_MAX_WIDTH) & ~1;	fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,			      VIMC_FRAME_MAX_HEIGHT) & ~1; 	/* TODO: add support for V4L2_FIELD_ALTERNATE */	if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)		fmt->field = fmt_default.field; 	vimc_colorimetry_clamp(fmt);} static u32 vimc_calc_vblank(u32 width, u32 height,			    s64 pixel_rate, s32 hblank){	u32 hts = width + hblank;	u32 target_fps;	u64 vts; 	target_fps = (width * height <= VIMC_PIXELS_THRESHOLD_30FPS) ? 30 : 10; 	vts = (u64)pixel_rate;	do_div(vts, target_fps * hts); 	if (vts > height)		return clamp((u32)(vts - height), VIMC_VBLANK_MIN, VIMC_VBLANK_MAX); 	return VIMC_VBLANK_MIN;} static int vimc_sensor_set_fmt(struct v4l2_subdev *sd,			       struct v4l2_subdev_state *sd_state,			       struct v4l2_subdev_format *fmt){	struct vimc_sensor_device *vsensor = v4l2_get_subdevdata(sd);	struct v4l2_mbus_framefmt *mf; 	/* Do not change the format while stream is on */	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE && vsensor->frame)		return -EBUSY; 	mf = v4l2_subdev_state_get_format(sd_state, fmt->pad); 	/* Set the new format */	vimc_sensor_adjust_fmt(&fmt->format); 	dev_dbg(vsensor->ved.dev, "%s: format update: "		"old:%dx%d (0x%x, %d, %d, %d, %d) "		"new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsensor->sd.name,		/* old */		mf->width, mf->height, mf->code,		mf->colorspace,	mf->quantization,		mf->xfer_func, mf->ycbcr_enc,		/* new */		fmt->format.width, fmt->format.height, fmt->format.code,		fmt->format.colorspace, fmt->format.quantization,		fmt->format.xfer_func, fmt->format.ycbcr_enc); 	*mf = fmt->format;	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {		u32 vblank_def = vimc_calc_vblank(fmt->format.width,						  fmt->format.height,						  vsensor->pixel_rate->val,						  vsensor->hblank->val);		vsensor->hw.size.width = fmt->format.width;		vsensor->hw.size.height = fmt->format.height;		__v4l2_ctrl_modify_range(vsensor->vblank,					 VIMC_VBLANK_MIN,					 VIMC_VBLANK_MAX,					 VIMC_VBLANK_STEP,					 vblank_def);		__v4l2_ctrl_s_ctrl(vsensor->vblank, vblank_def);	} 	return 0;} static const struct v4l2_subdev_pad_ops vimc_sensor_pad_ops = {	.enum_mbus_code		= vimc_sensor_enum_mbus_code,	.enum_frame_size	= vimc_sensor_enum_frame_size,	.get_fmt		= v4l2_subdev_get_fmt,	.set_fmt		= vimc_sensor_set_fmt,}; static void *vimc_sensor_process_frame(struct vimc_ent_device *ved,				       const void *sink_frame){	struct vimc_sensor_device *vsensor =		container_of(ved, struct vimc_sensor_device, ved); 	const unsigned int line_height = 16;	u8 *basep[TPG_MAX_PLANES][2];	unsigned int line = 1;	char str[100]; 	tpg_fill_plane_buffer(&vsensor->tpg, 0, 0, vsensor->frame);	tpg_calc_text_basep(&vsensor->tpg, basep, 0, vsensor->frame);	switch (vsensor->hw.osd_value) {	case VIMC_SENSOR_OSD_SHOW_ALL: {		const char *order = tpg_g_color_order(&vsensor->tpg); 		tpg_gen_text(&vsensor->tpg, basep, line++ * line_height,			     16, order);		snprintf(str, sizeof(str),			 "brightness %3d, contrast %3d, saturation %3d, hue %d ",			 vsensor->tpg.brightness,			 vsensor->tpg.contrast,			 vsensor->tpg.saturation,			 vsensor->tpg.hue);		tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str);		snprintf(str, sizeof(str), "sensor size: %dx%d",			 vsensor->hw.size.width, vsensor->hw.size.height);		tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str);		fallthrough;	}	case VIMC_SENSOR_OSD_SHOW_COUNTERS: {		unsigned int ms; 		ms = div_u64(ktime_get_ns() - vsensor->hw.start_stream_ts, 1000000);		snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d",			 (ms / (60 * 60 * 1000)) % 24,			 (ms / (60 * 1000)) % 60,			 (ms / 1000) % 60,			 ms % 1000);		tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str);		break;	}	case VIMC_SENSOR_OSD_SHOW_NONE:	default:		break;	} 	return vsensor->frame;} static int vimc_sensor_s_stream(struct v4l2_subdev *sd, int enable){	struct vimc_sensor_device *vsensor =				container_of(sd, struct vimc_sensor_device, sd); 	if (enable) {		const struct v4l2_mbus_framefmt *format;		struct v4l2_subdev_state *state;		const struct vimc_pix_map *vpix;		unsigned int frame_size; 		state = v4l2_subdev_lock_and_get_active_state(sd);		format = v4l2_subdev_state_get_format(state, 0); 		/* Configure the test pattern generator. */		vimc_sensor_tpg_s_format(vsensor, format); 		/* Calculate the frame size. */		vpix = vimc_pix_map_by_code(format->code);		frame_size = format->width * vpix->bpp * format->height; 		vsensor->hw.size.width = format->width;		vsensor->hw.size.height = format->height;		vimc_sensor_update_frame_timing(sd, format->width,						format->height); 		v4l2_subdev_unlock_state(state); 		/*		 * Allocate the frame buffer. Use vmalloc to be able to		 * allocate a large amount of memory		 */		vsensor->frame = vmalloc(frame_size);		if (!vsensor->frame)			return -ENOMEM; 		vsensor->hw.start_stream_ts = ktime_get_ns();	} else { 		vfree(vsensor->frame);		vsensor->frame = NULL;	} 	return 0;} static const struct v4l2_subdev_core_ops vimc_sensor_core_ops = {	.log_status = v4l2_ctrl_subdev_log_status,	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,	.unsubscribe_event = v4l2_event_subdev_unsubscribe,}; static const struct v4l2_subdev_video_ops vimc_sensor_video_ops = {	.s_stream = vimc_sensor_s_stream,}; static const struct v4l2_subdev_ops vimc_sensor_ops = {	.core = &vimc_sensor_core_ops,	.pad = &vimc_sensor_pad_ops,	.video = &vimc_sensor_video_ops,}; static const struct v4l2_subdev_internal_ops vimc_sensor_internal_ops = {	.init_state = vimc_sensor_init_state,}; static int vimc_sensor_s_ctrl(struct v4l2_ctrl *ctrl){	struct vimc_sensor_device *vsensor =		container_of(ctrl->handler, struct vimc_sensor_device, hdl); 	switch (ctrl->id) {	case VIMC_CID_TEST_PATTERN:		tpg_s_pattern(&vsensor->tpg, ctrl->val);		break;	case V4L2_CID_HFLIP:		tpg_s_hflip(&vsensor->tpg, ctrl->val);		break;	case V4L2_CID_VFLIP:		tpg_s_vflip(&vsensor->tpg, ctrl->val);		break;	case V4L2_CID_BRIGHTNESS:		tpg_s_brightness(&vsensor->tpg, ctrl->val);		break;	case V4L2_CID_CONTRAST:		tpg_s_contrast(&vsensor->tpg, ctrl->val);		break;	case V4L2_CID_HUE:		tpg_s_hue(&vsensor->tpg, ctrl->val);		break;	case V4L2_CID_SATURATION:		tpg_s_saturation(&vsensor->tpg, ctrl->val);		break;	case VIMC_CID_OSD_TEXT_MODE:		vsensor->hw.osd_value = ctrl->val;		break;	case V4L2_CID_PIXEL_RATE:		break;	case V4L2_CID_HBLANK:		break;	case V4L2_CID_VBLANK:		vimc_sensor_update_frame_timing(&vsensor->sd,						vsensor->hw.size.width,						vsensor->hw.size.height);		break;	default:		return -EINVAL;	}	return 0;} static const struct v4l2_ctrl_ops vimc_sensor_ctrl_ops = {	.s_ctrl = vimc_sensor_s_ctrl,}; static void vimc_sensor_release(struct vimc_ent_device *ved){	struct vimc_sensor_device *vsensor =		container_of(ved, struct vimc_sensor_device, ved); 	v4l2_ctrl_handler_free(&vsensor->hdl);	tpg_free(&vsensor->tpg);	v4l2_subdev_cleanup(&vsensor->sd);	media_entity_cleanup(vsensor->ved.ent);	kfree(vsensor);} /* Image Processing Controls */static const struct v4l2_ctrl_config vimc_sensor_ctrl_class = {	.flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,	.id = VIMC_CID_VIMC_CLASS,	.name = "VIMC Controls",	.type = V4L2_CTRL_TYPE_CTRL_CLASS,}; static const struct v4l2_ctrl_config vimc_sensor_ctrl_test_pattern = {	.ops = &vimc_sensor_ctrl_ops,	.id = VIMC_CID_TEST_PATTERN,	.name = "Test Pattern",	.type = V4L2_CTRL_TYPE_MENU,	.max = TPG_PAT_NOISE,	.qmenu = tpg_pattern_strings,}; static const char * const vimc_ctrl_osd_mode_strings[] = {	"All",	"Counters Only",	"None",	NULL,}; static const struct v4l2_ctrl_config vimc_sensor_ctrl_osd_mode = {	.ops = &vimc_sensor_ctrl_ops,	.id = VIMC_CID_OSD_TEXT_MODE,	.name = "Show Information",	.type = V4L2_CTRL_TYPE_MENU,	.max = ARRAY_SIZE(vimc_ctrl_osd_mode_strings) - 2,	.qmenu = vimc_ctrl_osd_mode_strings,}; static struct vimc_ent_device *vimc_sensor_add(struct vimc_device *vimc,					       const char *vcfg_name){	struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;	struct vimc_sensor_device *vsensor;	int ret; 	/* Allocate the vsensor struct */	vsensor = kzalloc_obj(*vsensor);	if (!vsensor)		return ERR_PTR(-ENOMEM); 	v4l2_ctrl_handler_init(&vsensor->hdl, 4); 	v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_class, NULL);	v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_test_pattern, NULL);	v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_osd_mode, NULL);	v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,			  V4L2_CID_VFLIP, 0, 1, 1, 0);	v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,			  V4L2_CID_HFLIP, 0, 1, 1, 0);	v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,			  V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);	v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,			  V4L2_CID_CONTRAST, 0, 255, 1, 128);	v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,			  V4L2_CID_HUE, -128, 127, 1, 0);	v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,			  V4L2_CID_SATURATION, 0, 255, 1, 128);	/* Timing controls for frame interval configuration */	vsensor->pixel_rate = v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,						V4L2_CID_PIXEL_RATE,						VIMC_PIXEL_RATE_FIXED, VIMC_PIXEL_RATE_FIXED,						1, VIMC_PIXEL_RATE_FIXED);	if (vsensor->pixel_rate)		vsensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY; 	vsensor->hblank = v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,					    V4L2_CID_HBLANK,					    VIMC_HBLANK_FIXED, VIMC_HBLANK_FIXED,					    1, VIMC_HBLANK_FIXED);	if (vsensor->hblank)		vsensor->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; 	vsensor->vblank = v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops,					    V4L2_CID_VBLANK,					    VIMC_VBLANK_MIN, VIMC_VBLANK_MAX,					    VIMC_VBLANK_STEP, VIMC_VBLANK_DEFAULT); 	vsensor->sd.ctrl_handler = &vsensor->hdl;	if (vsensor->hdl.error) {		ret = vsensor->hdl.error;		goto err_free_vsensor;	} 	/* Initialize the test pattern generator */	tpg_init(&vsensor->tpg, fmt_default.width, fmt_default.height);	ret = tpg_alloc(&vsensor->tpg, VIMC_FRAME_MAX_WIDTH);	if (ret)		goto err_free_hdl; 	/* Initialize ved and sd */	vsensor->pad.flags = MEDIA_PAD_FL_SOURCE;	ret = vimc_ent_sd_register(&vsensor->ved, &vsensor->sd, v4l2_dev,				   vcfg_name,				   MEDIA_ENT_F_CAM_SENSOR, 1, &vsensor->pad,				   &vimc_sensor_internal_ops, &vimc_sensor_ops);	if (ret)		goto err_free_tpg; 	vsensor->ved.process_frame = vimc_sensor_process_frame;	vsensor->ved.dev = vimc->mdev.dev; 	return &vsensor->ved; err_free_tpg:	tpg_free(&vsensor->tpg);err_free_hdl:	v4l2_ctrl_handler_free(&vsensor->hdl);err_free_vsensor:

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