// SPDX-License-Identifier: GPL-2.0-or-later
|
/*
|
* vimc-scaler.c Virtual Media Controller Driver
|
*
|
* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
|
*/
|
|
#include <linux/moduleparam.h>
|
#include <linux/vmalloc.h>
|
#include <linux/v4l2-mediabus.h>
|
#include <media/v4l2-rect.h>
|
#include <media/v4l2-subdev.h>
|
|
#include "vimc-common.h"
|
|
static unsigned int sca_mult = 3;
|
module_param(sca_mult, uint, 0000);
|
MODULE_PARM_DESC(sca_mult, " the image size multiplier");
|
|
#define MAX_ZOOM 8
|
|
#define VIMC_SCA_FMT_WIDTH_DEFAULT 640
|
#define VIMC_SCA_FMT_HEIGHT_DEFAULT 480
|
|
struct vimc_sca_device {
|
struct vimc_ent_device ved;
|
struct v4l2_subdev sd;
|
/* NOTE: the source fmt is the same as the sink
|
* with the width and hight multiplied by mult
|
*/
|
struct v4l2_mbus_framefmt sink_fmt;
|
struct v4l2_rect crop_rect;
|
/* Values calculated when the stream starts */
|
u8 *src_frame;
|
unsigned int src_line_size;
|
unsigned int bpp;
|
struct media_pad pads[2];
|
};
|
|
static const struct v4l2_mbus_framefmt sink_fmt_default = {
|
.width = VIMC_SCA_FMT_WIDTH_DEFAULT,
|
.height = VIMC_SCA_FMT_HEIGHT_DEFAULT,
|
.code = MEDIA_BUS_FMT_RGB888_1X24,
|
.field = V4L2_FIELD_NONE,
|
.colorspace = V4L2_COLORSPACE_SRGB,
|
};
|
|
static const struct v4l2_rect crop_rect_default = {
|
.width = VIMC_SCA_FMT_WIDTH_DEFAULT,
|
.height = VIMC_SCA_FMT_HEIGHT_DEFAULT,
|
.top = 0,
|
.left = 0,
|
};
|
|
static const struct v4l2_rect crop_rect_min = {
|
.width = VIMC_FRAME_MIN_WIDTH,
|
.height = VIMC_FRAME_MIN_HEIGHT,
|
.top = 0,
|
.left = 0,
|
};
|
|
static struct v4l2_rect
|
vimc_sca_get_crop_bound_sink(const struct v4l2_mbus_framefmt *sink_fmt)
|
{
|
/* Get the crop bounds to clamp the crop rectangle correctly */
|
struct v4l2_rect r = {
|
.left = 0,
|
.top = 0,
|
.width = sink_fmt->width,
|
.height = sink_fmt->height,
|
};
|
return r;
|
}
|
|
static void vimc_sca_adjust_sink_crop(struct v4l2_rect *r,
|
const struct v4l2_mbus_framefmt *sink_fmt)
|
{
|
const struct v4l2_rect sink_rect =
|
vimc_sca_get_crop_bound_sink(sink_fmt);
|
|
/* Disallow rectangles smaller than the minimal one. */
|
v4l2_rect_set_min_size(r, &crop_rect_min);
|
v4l2_rect_map_inside(r, &sink_rect);
|
}
|
|
static int vimc_sca_init_cfg(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg)
|
{
|
struct v4l2_mbus_framefmt *mf;
|
struct v4l2_rect *r;
|
unsigned int i;
|
|
mf = v4l2_subdev_get_try_format(sd, cfg, 0);
|
*mf = sink_fmt_default;
|
|
r = v4l2_subdev_get_try_crop(sd, cfg, 0);
|
*r = crop_rect_default;
|
|
for (i = 1; i < sd->entity.num_pads; i++) {
|
mf = v4l2_subdev_get_try_format(sd, cfg, i);
|
*mf = sink_fmt_default;
|
mf->width = mf->width * sca_mult;
|
mf->height = mf->height * sca_mult;
|
}
|
|
return 0;
|
}
|
|
static int vimc_sca_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);
|
const struct vimc_pix_map *vpix;
|
|
if (!mbus_code)
|
return -EINVAL;
|
|
vpix = vimc_pix_map_by_code(mbus_code);
|
|
/* We don't support bayer format */
|
if (!vpix || vpix->bayer)
|
return -EINVAL;
|
|
code->code = mbus_code;
|
|
return 0;
|
}
|
|
static int vimc_sca_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 in non bayer format */
|
vpix = vimc_pix_map_by_code(fse->code);
|
if (!vpix || vpix->bayer)
|
return -EINVAL;
|
|
fse->min_width = VIMC_FRAME_MIN_WIDTH;
|
fse->min_height = VIMC_FRAME_MIN_HEIGHT;
|
|
if (VIMC_IS_SINK(fse->pad)) {
|
fse->max_width = VIMC_FRAME_MAX_WIDTH;
|
fse->max_height = VIMC_FRAME_MAX_HEIGHT;
|
} else {
|
fse->max_width = VIMC_FRAME_MAX_WIDTH * MAX_ZOOM;
|
fse->max_height = VIMC_FRAME_MAX_HEIGHT * MAX_ZOOM;
|
}
|
|
return 0;
|
}
|
|
static int vimc_sca_get_fmt(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_format *format)
|
{
|
struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
|
struct v4l2_rect *crop_rect;
|
|
/* Get the current sink format */
|
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
|
format->format = *v4l2_subdev_get_try_format(sd, cfg, 0);
|
crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
|
} else {
|
format->format = vsca->sink_fmt;
|
crop_rect = &vsca->crop_rect;
|
}
|
|
/* Scale the frame size for the source pad */
|
if (VIMC_IS_SRC(format->pad)) {
|
format->format.width = crop_rect->width * sca_mult;
|
format->format.height = crop_rect->height * sca_mult;
|
}
|
|
return 0;
|
}
|
|
static void vimc_sca_adjust_sink_fmt(struct v4l2_mbus_framefmt *fmt)
|
{
|
const struct vimc_pix_map *vpix;
|
|
/* Only accept code in the pix map table in non bayer format */
|
vpix = vimc_pix_map_by_code(fmt->code);
|
if (!vpix || vpix->bayer)
|
fmt->code = sink_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;
|
|
if (fmt->field == V4L2_FIELD_ANY)
|
fmt->field = sink_fmt_default.field;
|
|
vimc_colorimetry_clamp(fmt);
|
}
|
|
static int vimc_sca_set_fmt(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_format *fmt)
|
{
|
struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
|
struct v4l2_mbus_framefmt *sink_fmt;
|
struct v4l2_rect *crop_rect;
|
|
if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
|
/* Do not change the format while stream is on */
|
if (vsca->src_frame)
|
return -EBUSY;
|
|
sink_fmt = &vsca->sink_fmt;
|
crop_rect = &vsca->crop_rect;
|
} else {
|
sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
|
crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
|
}
|
|
/*
|
* Do not change the format of the source pad,
|
* it is propagated from the sink
|
*/
|
if (VIMC_IS_SRC(fmt->pad)) {
|
fmt->format = *sink_fmt;
|
fmt->format.width = crop_rect->width * sca_mult;
|
fmt->format.height = crop_rect->height * sca_mult;
|
} else {
|
/* Set the new format in the sink pad */
|
vimc_sca_adjust_sink_fmt(&fmt->format);
|
|
dev_dbg(vsca->ved.dev, "%s: sink format update: "
|
"old:%dx%d (0x%x, %d, %d, %d, %d) "
|
"new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsca->sd.name,
|
/* old */
|
sink_fmt->width, sink_fmt->height, sink_fmt->code,
|
sink_fmt->colorspace, sink_fmt->quantization,
|
sink_fmt->xfer_func, sink_fmt->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);
|
|
*sink_fmt = fmt->format;
|
|
/* Do the crop, but respect the current bounds */
|
vimc_sca_adjust_sink_crop(crop_rect, sink_fmt);
|
}
|
|
return 0;
|
}
|
|
static int vimc_sca_get_selection(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_selection *sel)
|
{
|
struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
|
struct v4l2_mbus_framefmt *sink_fmt;
|
struct v4l2_rect *crop_rect;
|
|
if (VIMC_IS_SRC(sel->pad))
|
return -EINVAL;
|
|
if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
|
sink_fmt = &vsca->sink_fmt;
|
crop_rect = &vsca->crop_rect;
|
} else {
|
sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
|
crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
|
}
|
|
switch (sel->target) {
|
case V4L2_SEL_TGT_CROP:
|
sel->r = *crop_rect;
|
break;
|
case V4L2_SEL_TGT_CROP_BOUNDS:
|
sel->r = vimc_sca_get_crop_bound_sink(sink_fmt);
|
break;
|
default:
|
return -EINVAL;
|
}
|
|
return 0;
|
}
|
|
static int vimc_sca_set_selection(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_selection *sel)
|
{
|
struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
|
struct v4l2_mbus_framefmt *sink_fmt;
|
struct v4l2_rect *crop_rect;
|
|
if (VIMC_IS_SRC(sel->pad))
|
return -EINVAL;
|
|
if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
|
/* Do not change the format while stream is on */
|
if (vsca->src_frame)
|
return -EBUSY;
|
|
crop_rect = &vsca->crop_rect;
|
sink_fmt = &vsca->sink_fmt;
|
} else {
|
crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
|
sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
|
}
|
|
switch (sel->target) {
|
case V4L2_SEL_TGT_CROP:
|
/* Do the crop, but respect the current bounds */
|
vimc_sca_adjust_sink_crop(&sel->r, sink_fmt);
|
*crop_rect = sel->r;
|
break;
|
default:
|
return -EINVAL;
|
}
|
|
return 0;
|
}
|
|
static const struct v4l2_subdev_pad_ops vimc_sca_pad_ops = {
|
.init_cfg = vimc_sca_init_cfg,
|
.enum_mbus_code = vimc_sca_enum_mbus_code,
|
.enum_frame_size = vimc_sca_enum_frame_size,
|
.get_fmt = vimc_sca_get_fmt,
|
.set_fmt = vimc_sca_set_fmt,
|
.get_selection = vimc_sca_get_selection,
|
.set_selection = vimc_sca_set_selection,
|
};
|
|
static int vimc_sca_s_stream(struct v4l2_subdev *sd, int enable)
|
{
|
struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
|
|
if (enable) {
|
const struct vimc_pix_map *vpix;
|
unsigned int frame_size;
|
|
if (vsca->src_frame)
|
return 0;
|
|
/* Save the bytes per pixel of the sink */
|
vpix = vimc_pix_map_by_code(vsca->sink_fmt.code);
|
vsca->bpp = vpix->bpp;
|
|
/* Calculate the width in bytes of the src frame */
|
vsca->src_line_size = vsca->crop_rect.width *
|
sca_mult * vsca->bpp;
|
|
/* Calculate the frame size of the source pad */
|
frame_size = vsca->src_line_size * vsca->crop_rect.height *
|
sca_mult;
|
|
/* Allocate the frame buffer. Use vmalloc to be able to
|
* allocate a large amount of memory
|
*/
|
vsca->src_frame = vmalloc(frame_size);
|
if (!vsca->src_frame)
|
return -ENOMEM;
|
|
} else {
|
if (!vsca->src_frame)
|
return 0;
|
|
vfree(vsca->src_frame);
|
vsca->src_frame = NULL;
|
}
|
|
return 0;
|
}
|
|
static const struct v4l2_subdev_video_ops vimc_sca_video_ops = {
|
.s_stream = vimc_sca_s_stream,
|
};
|
|
static const struct v4l2_subdev_ops vimc_sca_ops = {
|
.pad = &vimc_sca_pad_ops,
|
.video = &vimc_sca_video_ops,
|
};
|
|
static void vimc_sca_fill_pix(u8 *const ptr,
|
const u8 *const pixel,
|
const unsigned int bpp)
|
{
|
unsigned int i;
|
|
/* copy the pixel to the pointer */
|
for (i = 0; i < bpp; i++)
|
ptr[i] = pixel[i];
|
}
|
|
static void vimc_sca_scale_pix(const struct vimc_sca_device *const vsca,
|
unsigned int lin, unsigned int col,
|
const u8 *const sink_frame)
|
{
|
const struct v4l2_rect crop_rect = vsca->crop_rect;
|
unsigned int i, j, index;
|
const u8 *pixel;
|
|
/* Point to the pixel value in position (lin, col) in the sink frame */
|
index = VIMC_FRAME_INDEX(lin, col,
|
vsca->sink_fmt.width,
|
vsca->bpp);
|
pixel = &sink_frame[index];
|
|
dev_dbg(vsca->ved.dev,
|
"sca: %s: --- scale_pix sink pos %dx%d, index %d ---\n",
|
vsca->sd.name, lin, col, index);
|
|
/* point to the place we are going to put the first pixel
|
* in the scaled src frame
|
*/
|
lin -= crop_rect.top;
|
col -= crop_rect.left;
|
index = VIMC_FRAME_INDEX(lin * sca_mult, col * sca_mult,
|
crop_rect.width * sca_mult, vsca->bpp);
|
|
dev_dbg(vsca->ved.dev, "sca: %s: scale_pix src pos %dx%d, index %d\n",
|
vsca->sd.name, lin * sca_mult, col * sca_mult, index);
|
|
/* Repeat this pixel mult times */
|
for (i = 0; i < sca_mult; i++) {
|
/* Iterate through each beginning of a
|
* pixel repetition in a line
|
*/
|
for (j = 0; j < sca_mult * vsca->bpp; j += vsca->bpp) {
|
dev_dbg(vsca->ved.dev,
|
"sca: %s: sca: scale_pix src pos %d\n",
|
vsca->sd.name, index + j);
|
|
/* copy the pixel to the position index + j */
|
vimc_sca_fill_pix(&vsca->src_frame[index + j],
|
pixel, vsca->bpp);
|
}
|
|
/* move the index to the next line */
|
index += vsca->src_line_size;
|
}
|
}
|
|
static void vimc_sca_fill_src_frame(const struct vimc_sca_device *const vsca,
|
const u8 *const sink_frame)
|
{
|
const struct v4l2_rect r = vsca->crop_rect;
|
unsigned int i, j;
|
|
/* Scale each pixel from the original sink frame */
|
/* TODO: implement scale down, only scale up is supported for now */
|
for (i = r.top; i < r.top + r.height; i++)
|
for (j = r.left; j < r.left + r.width; j++)
|
vimc_sca_scale_pix(vsca, i, j, sink_frame);
|
}
|
|
static void *vimc_sca_process_frame(struct vimc_ent_device *ved,
|
const void *sink_frame)
|
{
|
struct vimc_sca_device *vsca = container_of(ved, struct vimc_sca_device,
|
ved);
|
|
/* If the stream in this node is not active, just return */
|
if (!vsca->src_frame)
|
return ERR_PTR(-EINVAL);
|
|
vimc_sca_fill_src_frame(vsca, sink_frame);
|
|
return vsca->src_frame;
|
};
|
|
static void vimc_sca_release(struct vimc_ent_device *ved)
|
{
|
struct vimc_sca_device *vsca =
|
container_of(ved, struct vimc_sca_device, ved);
|
|
media_entity_cleanup(vsca->ved.ent);
|
kfree(vsca);
|
}
|
|
static struct vimc_ent_device *vimc_sca_add(struct vimc_device *vimc,
|
const char *vcfg_name)
|
{
|
struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;
|
struct vimc_sca_device *vsca;
|
int ret;
|
|
/* Allocate the vsca struct */
|
vsca = kzalloc(sizeof(*vsca), GFP_KERNEL);
|
if (!vsca)
|
return ERR_PTR(-ENOMEM);
|
|
/* Initialize ved and sd */
|
vsca->pads[0].flags = MEDIA_PAD_FL_SINK;
|
vsca->pads[1].flags = MEDIA_PAD_FL_SOURCE;
|
|
ret = vimc_ent_sd_register(&vsca->ved, &vsca->sd, v4l2_dev,
|
vcfg_name,
|
MEDIA_ENT_F_PROC_VIDEO_SCALER, 2,
|
vsca->pads, &vimc_sca_ops);
|
if (ret) {
|
kfree(vsca);
|
return ERR_PTR(ret);
|
}
|
|
vsca->ved.process_frame = vimc_sca_process_frame;
|
vsca->ved.dev = vimc->mdev.dev;
|
|
/* Initialize the frame format */
|
vsca->sink_fmt = sink_fmt_default;
|
|
/* Initialize the crop selection */
|
vsca->crop_rect = crop_rect_default;
|
|
return &vsca->ved;
|
}
|
|
struct vimc_ent_type vimc_sca_type = {
|
.add = vimc_sca_add,
|
.release = vimc_sca_release
|
};
|
