// SPDX-License-Identifier: GPL-2.0-or-later
/*
* vimc-sensor.c Virtual Media Controller Driver
*
* Copyright (C) 2015-2017 Helen Koike <[email protected]>
*/
#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"
enum vimc_sensor_osd_mode {
VIMC_SENSOR_OSD_SHOW_ALL = 0,
VIMC_SENSOR_OSD_SHOW_COUNTERS = 1,
VIMC_SENSOR_OSD_SHOW_NONE = 2
};
struct vimc_sensor_device {
struct vimc_ent_device ved;
struct v4l2_subdev sd;
struct tpg_data tpg;
struct v4l2_ctrl_handler hdl;
struct media_pad pad;
u8 *frame;
/*
* Virtual "hardware" configuration, filled when the stream starts or
* when controls are set.
*/
struct {
struct v4l2_area size;
enum vimc_sensor_osd_mode osd_value;
u64 start_stream_ts;
} hw;
};
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 v4l2_mbus_framefmt *mf;
mf = v4l2_subdev_state_get_format(sd_state, 0);
*mf = fmt_default;
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_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 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;
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;
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;
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(sizeof(*vsensor), GFP_KERNEL);
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);
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:
kfree(vsensor);
return ERR_PTR(ret);
}
const struct vimc_ent_type vimc_sensor_type = {
.add = vimc_sensor_add,
.release = vimc_sensor_release
};
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