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// 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"
struct vimc_sen_device {
struct vimc_ent_device ved;
struct v4l2_subdev sd;
struct tpg_data tpg;
u8 *frame;
/* The active format */
struct v4l2_mbus_framefmt mbus_format;
struct v4l2_ctrl_handler hdl;
struct media_pad pad;
};
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_sen_init_cfg(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg)
{
unsigned int i;
for (i = 0; i < sd->entity.num_pads; i++) {
struct v4l2_mbus_framefmt *mf;
mf = v4l2_subdev_get_try_format(sd, cfg, i);
*mf = fmt_default;
}
return 0;
}
static int vimc_sen_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
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_sen_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
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 int vimc_sen_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct vimc_sen_device *vsen =
container_of(sd, struct vimc_sen_device, sd);
fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
*v4l2_subdev_get_try_format(sd, cfg, fmt->pad) :
vsen->mbus_format;
return 0;
}
static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen)
{
const struct vimc_pix_map *vpix =
vimc_pix_map_by_code(vsen->mbus_format.code);
tpg_reset_source(&vsen->tpg, vsen->mbus_format.width,
vsen->mbus_format.height, vsen->mbus_format.field);
tpg_s_bytesperline(&vsen->tpg, 0, vsen->mbus_format.width * vpix->bpp);
tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height);
tpg_s_fourcc(&vsen->tpg, vpix->pixelformat);
/* TODO: add support for V4L2_FIELD_ALTERNATE */
tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false);
tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace);
tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc);
tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization);
tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func);
}
static void vimc_sen_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_sen_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *mf;
if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
/* Do not change the format while stream is on */
if (vsen->frame)
return -EBUSY;
mf = &vsen->mbus_format;
} else {
mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
}
/* Set the new format */
vimc_sen_adjust_fmt(&fmt->format);
dev_dbg(vsen->ved.dev, "%s: format update: "
"old:%dx%d (0x%x, %d, %d, %d, %d) "
"new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->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_sen_pad_ops = {
.init_cfg = vimc_sen_init_cfg,
.enum_mbus_code = vimc_sen_enum_mbus_code,
.enum_frame_size = vimc_sen_enum_frame_size,
.get_fmt = vimc_sen_get_fmt,
.set_fmt = vimc_sen_set_fmt,
};
static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
const void *sink_frame)
{
struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
ved);
tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
return vsen->frame;
}
static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
{
struct vimc_sen_device *vsen =
container_of(sd, struct vimc_sen_device, sd);
if (enable) {
const struct vimc_pix_map *vpix;
unsigned int frame_size;
/* Calculate the frame size */
vpix = vimc_pix_map_by_code(vsen->mbus_format.code);
frame_size = vsen->mbus_format.width * vpix->bpp *
vsen->mbus_format.height;
/*
* Allocate the frame buffer. Use vmalloc to be able to
* allocate a large amount of memory
*/
vsen->frame = vmalloc(frame_size);
if (!vsen->frame)
return -ENOMEM;
/* configure the test pattern generator */
vimc_sen_tpg_s_format(vsen);
} else {
vfree(vsen->frame);
vsen->frame = NULL;
}
return 0;
}
static const struct v4l2_subdev_core_ops vimc_sen_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_sen_video_ops = {
.s_stream = vimc_sen_s_stream,
};
static const struct v4l2_subdev_ops vimc_sen_ops = {
.core = &vimc_sen_core_ops,
.pad = &vimc_sen_pad_ops,
.video = &vimc_sen_video_ops,
};
static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct vimc_sen_device *vsen =
container_of(ctrl->handler, struct vimc_sen_device, hdl);
switch (ctrl->id) {
case VIMC_CID_TEST_PATTERN:
tpg_s_pattern(&vsen->tpg,
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