/*
* vimc-common.c Virtual Media Controller Driver
*
* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include "vimc-common.h"
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,
},
{
.code = MEDIA_BUS_FMT_RGB888_1X24,
.pixelformat = V4L2_PIX_FMT_RGB24,
.bpp = 3,
},
{
.code = MEDIA_BUS_FMT_ARGB8888_1X32,
.pixelformat = V4L2_PIX_FMT_ARGB32,
.bpp = 4,
},
/* Bayer formats */
{
.code = MEDIA_BUS_FMT_SBGGR8_1X8,
.pixelformat = V4L2_PIX_FMT_SBGGR8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SGBRG8_1X8,
.pixelformat = V4L2_PIX_FMT_SGBRG8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SGRBG8_1X8,
.pixelformat = V4L2_PIX_FMT_SGRBG8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SRGGB8_1X8,
.pixelformat = V4L2_PIX_FMT_SRGGB8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
.pixelformat = V4L2_PIX_FMT_SBGGR10,
.bpp = 2,
},
{
.code = MEDIA_BUS_FMT_SGBRG10_1X10,
.pixelformat = V4L2_PIX_FMT_SGBRG10,
.bpp = 2,
},
{
.code = MEDIA_BUS_FMT_SGRBG10_1X10,
.pixelformat = V4L2_PIX_FMT_SGRBG10,
.bpp = 2,
},
{
.code = MEDIA_BUS_FMT_SRGGB10_1X10,
.pixelformat = V4L2_PIX_FMT_SRGGB10,
.bpp = 2,
},
/* 10bit raw bayer a-law compressed to 8 bits */
{
.code = MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8,
.pixelformat = V4L2_PIX_FMT_SBGGR10ALAW8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8,
.pixelformat = V4L2_PIX_FMT_SGBRG10ALAW8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
.pixelformat = V4L2_PIX_FMT_SGRBG10ALAW8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8,
.pixelformat = V4L2_PIX_FMT_SRGGB10ALAW8,
.bpp = 1,
},
/* 10bit raw bayer DPCM compressed to 8 bits */
{
.code = MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
.pixelformat = V4L2_PIX_FMT_SBGGR10DPCM8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
.pixelformat = V4L2_PIX_FMT_SGBRG10DPCM8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
.pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
.pixelformat = V4L2_PIX_FMT_SRGGB10DPCM8,
.bpp = 1,
},
{
.code = MEDIA_BUS_FMT_SBGGR12_1X12,
.pixelformat = V4L2_PIX_FMT_SBGGR12,
.bpp = 2,
},
{
.code = MEDIA_BUS_FMT_SGBRG12_1X12,
.pixelformat = V4L2_PIX_FMT_SGBRG12,
.bpp = 2,
},
{
.code = MEDIA_BUS_FMT_SGRBG12_1X12,
.pixelformat = V4L2_PIX_FMT_SGRBG12,
.bpp = 2,
},
{
.code = MEDIA_BUS_FMT_SRGGB12_1X12,
.pixelformat = V4L2_PIX_FMT_SRGGB12,
.bpp = 2,
},
};
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;
}
int vimc_propagate_frame(struct media_pad *src, const void *frame)
{
struct media_link *link;
if (!(src->flags & MEDIA_PAD_FL_SOURCE))
return -EINVAL;
/* Send this frame to all sink pads that are direct linked */
list_for_each_entry(link, &src->entity->links, list) {
if (link->source == src &&
(link->flags & MEDIA_LNK_FL_ENABLED)) {
struct vimc_ent_device *ved = NULL;
struct media_entity *entity = link->sink->entity;
if (is_media_entity_v4l2_subdev(entity)) {
struct v4l2_subdev *sd =
container_of(entity, struct v4l2_subdev,
entity);
ved = v4l2_get_subdevdata(sd);
} else if (is_media_entity_v4l2_video_device(entity)) {
struct video_device *vdev =
container_of(entity,
struct video_device,
entity);
ved = video_get_drvdata(vdev);
}
if (ved && ved->process_frame)
ved->process_frame(ved, link->sink, frame);
}
}
return 0;
}
/* Helper function to allocate and initialize pads */
struct media_pad *vimc_pads_init(u16 num_pads, const unsigned long *pads_flag)
{
struct media_pad *pads;
unsigned int i;
/* Allocate memory for the pads */
pads = kcalloc(num_pads, sizeof(*pads), GFP_KERNEL);
if (!pads)
return ERR_PTR(-ENOMEM);
/* Initialize the pads */
for (i = 0; i < num_pads; i++) {
pads[i].index = i;
pads[i].flags = pads_flag[i];
}
return pads;
}
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,
const unsigned long *pads_flag,
const struct v4l2_subdev_ops *sd_ops,
void (*sd_destroy)(struct vimc_ent_device *))
{
int ret;
/* Allocate the pads */
ved->pads = vimc_pads_init(num_pads, pads_flag);
if (IS_ERR(ved->pads))
return PTR_ERR(ved->pads);
/* Fill the vimc_ent_device struct */
ved->destroy = sd_destroy;
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;
strlcpy(sd->name, name, sizeof(sd->name));
v4l2_set_subdevdata(sd, ved);
/* Expose this subdev to user space */
sd->flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
/* Initialize the media entity */
ret = media_entity_pads_init(&sd->entity, num_pads, ved->pads);
if (ret)
goto err_clean_pads;
/* 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);
err_clean_pads:
vimc_pads_cleanup(ved->pads);
return ret;
}
void vimc_ent_sd_unregister(struct vimc_ent_device *ved, struct v4l2_subdev *sd)
{
v4l2_device_unregister_subdev(sd);
media_entity_cleanup(ved->ent);
vimc_pads_cleanup(ved->pads);
}
