// SPDX-License-Identifier: GPL-2.0-or-later
/*
* vimc-common.c Virtual Media Controller Driver
*
* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
*/
#include <linux/init.h>
#include <linux/module.h>
#include "vimc-common.h"
/*
* NOTE: non-bayer formats need to come first (necessary for enum_mbus_code
* in the scaler)
*/
static const struct vimc_pix_map vimc_pix_map_list[] = {
/* TODO: add all missing formats */
/* RGB formats */
{
.code = MEDIA_BUS_FMT_BGR888_1X24,
.pixelformat = V4L2_PIX_FMT_BGR24,
.bpp = 3,
.bayer = false,
},
{
.code = MEDIA_BUS_FMT_RGB888_1X24,
.pixelformat = V4L2_PIX_FMT_RGB24,
.bpp = 3,
.bayer = false,
},
{
.code = MEDIA_BUS_FMT_ARGB8888_1X32,
.pixelformat = V4L2_PIX_FMT_ARGB32,
.bpp = 4,
.bayer = false,
},
/* Bayer formats */
{
.code = MEDIA_BUS_FMT_SBGGR8_1X8,
.pixelformat = V4L2_PIX_FMT_SBGGR8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGBRG8_1X8,
.pixelformat = V4L2_PIX_FMT_SGBRG8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGRBG8_1X8,
.pixelformat = V4L2_PIX_FMT_SGRBG8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SRGGB8_1X8,
.pixelformat = V4L2_PIX_FMT_SRGGB8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
.pixelformat = V4L2_PIX_FMT_SBGGR10,
.bpp = 2,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGBRG10_1X10,
.pixelformat = V4L2_PIX_FMT_SGBRG10,
.bpp = 2,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGRBG10_1X10,
.pixelformat = V4L2_PIX_FMT_SGRBG10,
.bpp = 2,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SRGGB10_1X10,
.pixelformat = V4L2_PIX_FMT_SRGGB10,
.bpp = 2,
.bayer = true,
},
/* 10bit raw bayer a-law compressed to 8 bits */
{
.code = MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8,
.pixelformat = V4L2_PIX_FMT_SBGGR10ALAW8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8,
.pixelformat = V4L2_PIX_FMT_SGBRG10ALAW8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
.pixelformat = V4L2_PIX_FMT_SGRBG10ALAW8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8,
.pixelformat = V4L2_PIX_FMT_SRGGB10ALAW8,
.bpp = 1,
.bayer = true,
},
/* 10bit raw bayer DPCM compressed to 8 bits */
{
.code = MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
.pixelformat = V4L2_PIX_FMT_SBGGR10DPCM8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
.pixelformat = V4L2_PIX_FMT_SGBRG10DPCM8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
.pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
.pixelformat = V4L2_PIX_FMT_SRGGB10DPCM8,
.bpp = 1,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SBGGR12_1X12,
.pixelformat = V4L2_PIX_FMT_SBGGR12,
.bpp = 2,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGBRG12_1X12,
.pixelformat = V4L2_PIX_FMT_SGBRG12,
.bpp = 2,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SGRBG12_1X12,
.pixelformat = V4L2_PIX_FMT_SGRBG12,
.bpp = 2,
.bayer = true,
},
{
.code = MEDIA_BUS_FMT_SRGGB12_1X12,
.pixelformat = V4L2_PIX_FMT_SRGGB12,
.bpp = 2,
.bayer = true,
},
};
bool vimc_is_source(struct media_entity *ent)
{
unsigned int i;
for (i = 0; i < ent->num_pads; i++)
if (ent->pads[i].flags & MEDIA_PAD_FL_SINK)
return false;
return true;
}
const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i)
{
if (i >= ARRAY_SIZE(vimc_pix_map_list))
return NULL;
return &vimc_pix_map_list[i];
}
const struct vimc_pix_map *vimc_pix_map_by_code(u32 code)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
if (vimc_pix_map_list[i].code == code)
return &vimc_pix_map_list[i];
}
return NULL;
}
const struct vimc_pix_map *vimc_pix_map_by_pixelformat(u32 pixelformat)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
if (vimc_pix_map_list[i].pixelformat == pixelformat)
return &vimc_pix_map_list[i];
}
return NULL;
}
static int vimc_get_pix_format(struct media_pad *pad,
struct v4l2_pix_format *fmt)
{
if (is_media_entity_v4l2_subdev(pad->entity)) {
struct v4l2_subdev *sd =
media_entity_to_v4l2_subdev(pad->entity);
struct v4l2_subdev_format sd_fmt;
const struct vimc_pix_map *pix_map;
int ret;
sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
sd_fmt.pad = pad->index;
ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sd_fmt);
if (ret)
return ret;
v4l2_fill_pix_format(fmt, &sd_fmt.format);
pix_map = vimc_pix_map_by_code(sd_fmt.format.code);
fmt->pixelformat = pix_map->pixelformat;
} else if (is_media_entity_v4l2_video_device(pad->entity)) {
struct video_device *vdev = container_of(pad->entity,
struct video_device,
entity);
struct vimc_ent_device *ved = video_get_drvdata(vdev);
if (!ved->vdev_get_format)
return -ENOIOCTLCMD;
ved->vdev_get_format(ved, fmt);
} else {
return -EINVAL;
}
return 0;
}
int vimc_vdev_link_validate(struct media_link *link)
{
struct v4l2_pix_format source_fmt, sink_fmt;
int ret;
ret = vimc_get_pix_format(link->source, &source_fmt);
if (ret)
return ret;
ret = vimc_get_pix_format(link->sink, &sink_fmt);
if (ret)
return ret;
pr_info("vimc link validate: "
"%s:src:%dx%d (0x%x, %d, %d, %d, %d) "
"%s:snk:%dx%d (0x%x, %d, %d, %d, %d)\n",
/* src */
link->source->entity->name,
source_fmt.width, source_fmt.height,
source_fmt.pixelformat, source_fmt.colorspace,
source_fmt.quantization, source_fmt.xfer_func,
source_fmt.ycbcr_enc,
/* sink */
link->sink->entity->name,
sink_fmt.width, sink_fmt.height,
sink_fmt.pixelformat, sink_fmt.colorspace,
sink_fmt.quantization, sink_fmt.xfer_func,
sink_fmt.ycbcr_enc);
/* The width, height and pixelformat must match. */
if (source_fmt.width != sink_fmt.width ||
source_fmt.height != sink_fmt.height ||
source_fmt.pixelformat != sink_fmt.pixelformat)
return -EPIPE;
/*
* The field order must match, or the sink field order must be NONE
* to support interlaced hardware connected to bridges that support
* progressive formats only.
*/
if (source_fmt.field != sink_fmt.field &&
sink_fmt.field != V4L2_FIELD_NONE)
return -EPIPE;
/*
* If colorspace is DEFAULT, then assume all the colorimetry is also
* DEFAULT, return 0 to skip comparing the other colorimetry parameters
*/
if (source_fmt.colorspace == V4L2_COLORSPACE_DEFAULT ||
sink_fmt.colorspace == V4L2_COLORSPACE_DEFAULT)
return 0;
/* Colorspace must match. */
if (source_fmt.colorspace != sink_fmt.colorspace)
return -EPIPE;
/* Colorimetry must match if they are not set to DEFAULT */
if (source_fmt.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT &&
sink_fmt.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT &&
source_fmt.ycbcr_enc != sink_fmt.ycbcr_enc)
return -EPIPE;
if (source_fmt.quantization != V4L2_QUANTIZATION_DEFAULT &&
sink_fmt.quantization != V4L2_QUANTIZATION_DEFAULT &&
source_fmt.quantization != sink_fmt.quantization)
return -EPIPE;
if (source_fmt.xfer_func != V4L2_XFER_FUNC_DEFAULT &&
sink_fmt.xfer_func != V4L2_XFER_FUNC_DEFAULT &&
source_fmt.xfer_func != sink_fmt.xfer_func)
return -EPIPE;
return 0;
}
static const struct media_entity_operations vimc_ent_sd_mops = {
.link_validate = v4l2_subdev_link_validate,
};
int vimc_ent_sd_register(struct vimc_ent_device *ved,
struct v4l2_subdev *sd,
struct v4l2_device *v4l2_dev,
const char *const name,
u32 function,
u16 num_pads,
struct media_pad *pads,
const struct v4l2_subdev_ops *sd_ops)
{
int ret;
/* Fill the vimc_ent_device struct */
ved->ent = &sd->entity;
/* Initialize the subdev */
v4l2_subdev_init(sd, sd_ops);
sd->entity.function = function;
sd->entity.ops = &vimc_ent_sd_mops;
sd->owner = THIS_MODULE;
strscpy(sd->name, name, sizeof(sd->name));
v4l2_set_subdevdata(sd, ved);
/* Expose this subdev to user space */
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
if (sd->ctrl_handler)
sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS;
/* Initialize the media entity */
ret = media_entity_pads_init(&sd->entity, num_pads, pads);
if (ret)
return ret;
/* Register the subdev with the v4l2 and the media framework */
ret = v4l2_device_register_subdev(v4l2_dev, sd);
if (ret) {
dev_err(v4l2_dev->dev,
"%s: subdev register failed (err=%d)\n",
name, ret);
goto err_clean_m_ent;
}
return 0;
err_clean_m_ent:
media_entity_cleanup(&sd->entity);
return ret;
}