Release 4.16 drivers/staging/media/imx/imx-media-internal-sd.c
/*
* Media driver for Freescale i.MX5/6 SOC
*
* Adds the internal subdevices and the media links between them.
*
* Copyright (c) 2016 Mentor Graphics Inc.
*
* 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.
*/
#include <linux/platform_device.h>
#include "imx-media.h"
enum isd_enum {
isd_csi0 = 0,
isd_csi1,
isd_vdic,
isd_ic_prp,
isd_ic_prpenc,
isd_ic_prpvf,
num_isd,
};
static const struct internal_subdev_id {
enum isd_enum index;
const char *name;
u32 grp_id;
} isd_id[num_isd] = {
[isd_csi0] = {
.index = isd_csi0,
.grp_id = IMX_MEDIA_GRP_ID_CSI0,
.name = "imx-ipuv3-csi",
},
[isd_csi1] = {
.index = isd_csi1,
.grp_id = IMX_MEDIA_GRP_ID_CSI1,
.name = "imx-ipuv3-csi",
},
[isd_vdic] = {
.index = isd_vdic,
.grp_id = IMX_MEDIA_GRP_ID_VDIC,
.name = "imx-ipuv3-vdic",
},
[isd_ic_prp] = {
.index = isd_ic_prp,
.grp_id = IMX_MEDIA_GRP_ID_IC_PRP,
.name = "imx-ipuv3-ic",
},
[isd_ic_prpenc] = {
.index = isd_ic_prpenc,
.grp_id = IMX_MEDIA_GRP_ID_IC_PRPENC,
.name = "imx-ipuv3-ic",
},
[isd_ic_prpvf] = {
.index = isd_ic_prpvf,
.grp_id = IMX_MEDIA_GRP_ID_IC_PRPVF,
.name = "imx-ipuv3-ic",
},
};
struct internal_subdev;
struct internal_link {
const struct internal_subdev *remote;
int local_pad;
int remote_pad;
};
/* max pads per internal-sd */
#define MAX_INTERNAL_PADS 8
/* max links per internal-sd pad */
#define MAX_INTERNAL_LINKS 8
struct internal_pad {
struct internal_link link[MAX_INTERNAL_LINKS];
};
static const struct internal_subdev {
const struct internal_subdev_id *id;
struct internal_pad pad[MAX_INTERNAL_PADS];
} int_subdev[num_isd] = {
[isd_csi0] = {
.id = &isd_id[isd_csi0],
.pad[CSI_SRC_PAD_DIRECT] = {
.link = {
{
.local_pad = CSI_SRC_PAD_DIRECT,
.remote = &int_subdev[isd_ic_prp],
.remote_pad = PRP_SINK_PAD,
}, {
.local_pad = CSI_SRC_PAD_DIRECT,
.remote = &int_subdev[isd_vdic],
.remote_pad = VDIC_SINK_PAD_DIRECT,
},
},
},
},
[isd_csi1] = {
.id = &isd_id[isd_csi1],
.pad[CSI_SRC_PAD_DIRECT] = {
.link = {
{
.local_pad = CSI_SRC_PAD_DIRECT,
.remote = &int_subdev[isd_ic_prp],
.remote_pad = PRP_SINK_PAD,
}, {
.local_pad = CSI_SRC_PAD_DIRECT,
.remote = &int_subdev[isd_vdic],
.remote_pad = VDIC_SINK_PAD_DIRECT,
},
},
},
},
[isd_vdic] = {
.id = &isd_id[isd_vdic],
.pad[VDIC_SRC_PAD_DIRECT] = {
.link = {
{
.local_pad = VDIC_SRC_PAD_DIRECT,
.remote = &int_subdev[isd_ic_prp],
.remote_pad = PRP_SINK_PAD,
},
},
},
},
[isd_ic_prp] = {
.id = &isd_id[isd_ic_prp],
.pad[PRP_SRC_PAD_PRPENC] = {
.link = {
{
.local_pad = PRP_SRC_PAD_PRPENC,
.remote = &int_subdev[isd_ic_prpenc],
.remote_pad = 0,
},
},
},
.pad[PRP_SRC_PAD_PRPVF] = {
.link = {
{
.local_pad = PRP_SRC_PAD_PRPVF,
.remote = &int_subdev[isd_ic_prpvf],
.remote_pad = 0,
},
},
},
},
[isd_ic_prpenc] = {
.id = &isd_id[isd_ic_prpenc],
},
[isd_ic_prpvf] = {
.id = &isd_id[isd_ic_prpvf],
},
};
/* form a device name given an internal subdev and ipu id */
static inline void isd_to_devname(char *devname, int sz,
const struct internal_subdev *isd,
int ipu_id)
{
int pdev_id = ipu_id * num_isd + isd->id->index;
snprintf(devname, sz, "%s.%d", isd->id->name, pdev_id);
}
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static const struct internal_subdev *find_intsd_by_grp_id(u32 grp_id)
{
enum isd_enum i;
for (i = 0; i < num_isd; i++) {
const struct internal_subdev *isd = &int_subdev[i];
if (isd->id->grp_id == grp_id)
return isd;
}
return NULL;
}
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static struct v4l2_subdev *find_sink(struct imx_media_dev *imxmd,
struct v4l2_subdev *src,
const struct internal_link *link)
{
char sink_devname[32];
int ipu_id;
/*
* retrieve IPU id from subdev name, note: can't get this from
* struct imx_media_internal_sd_platformdata because if src is
* a CSI, it has different struct ipu_client_platformdata which
* does not contain IPU id.
*/
if (sscanf(src->name, "ipu%d", &ipu_id) != 1)
return NULL;
isd_to_devname(sink_devname, sizeof(sink_devname),
link->remote, ipu_id - 1);
return imx_media_find_subdev_by_devname(imxmd, sink_devname);
}
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static int create_ipu_internal_link(struct imx_media_dev *imxmd,
struct v4l2_subdev *src,
const struct internal_link *link)
{
struct v4l2_subdev *sink;
int ret;
sink = find_sink(imxmd, src, link);
if (!sink)
return -ENODEV;
v4l2_info(&imxmd->v4l2_dev, "%s:%d -> %s:%d\n",
src->name, link->local_pad,
sink->name, link->remote_pad);
ret = media_create_pad_link(&src->entity, link->local_pad,
&sink->entity, link->remote_pad, 0);
if (ret)
v4l2_err(&imxmd->v4l2_dev,
"create_pad_link failed: %d\n", ret);
return ret;
}
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int imx_media_create_internal_links(struct imx_media_dev *imxmd,
struct v4l2_subdev *sd)
{
const struct internal_subdev *intsd;
const struct internal_pad *intpad;
const struct internal_link *link;
struct media_pad *pad;
int i, j, ret;
intsd = find_intsd_by_grp_id(sd->grp_id);
if (!intsd)
return -ENODEV;
/* create the source->sink links */
for (i = 0; i < sd->entity.num_pads; i++) {
intpad = &intsd->pad[i];
pad = &sd->entity.pads[i];
if (!(pad->flags & MEDIA_PAD_FL_SOURCE))
continue;
for (j = 0; ; j++) {
link = &intpad->link[j];
if (!link->remote)
break;
ret = create_ipu_internal_link(imxmd, sd, link);
if (ret)
return ret;
}
}
return 0;
}
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/* register an internal subdev as a platform device */
static int add_internal_subdev(struct imx_media_dev *imxmd,
const struct internal_subdev *isd,
int ipu_id)
{
struct imx_media_internal_sd_platformdata pdata;
struct platform_device_info pdevinfo = {0};
struct platform_device *pdev;
pdata.grp_id = isd->id->grp_id;
/* the id of IPU this subdev will control */
pdata.ipu_id = ipu_id;
/* create subdev name */
imx_media_grp_id_to_sd_name(pdata.sd_name, sizeof(pdata.sd_name),
pdata.grp_id, ipu_id);
pdevinfo.name = isd->id->name;
pdevinfo.id = ipu_id * num_isd + isd->id->index;
pdevinfo.parent = imxmd->md.dev;
pdevinfo.data = &pdata;
pdevinfo.size_data = sizeof(pdata);
pdevinfo.dma_mask = DMA_BIT_MASK(32);
pdev = platform_device_register_full(&pdevinfo);
if (IS_ERR(pdev))
return PTR_ERR(pdev);
return imx_media_add_async_subdev(imxmd, NULL, pdev);
}
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/* adds the internal subdevs in one ipu */
static int add_ipu_internal_subdevs(struct imx_media_dev *imxmd, int ipu_id)
{
enum isd_enum i;
for (i = 0; i < num_isd; i++) {
const struct internal_subdev *isd = &int_subdev[i];
int ret;
/*
* the CSIs are represented in the device-tree, so those
* devices are already added to the async subdev list by
* of_parse_subdev().
*/
switch (isd->id->grp_id) {
case IMX_MEDIA_GRP_ID_CSI0:
case IMX_MEDIA_GRP_ID_CSI1:
ret = 0;
break;
default:
ret = add_internal_subdev(imxmd, isd, ipu_id);
break;
}
if (ret)
return ret;
}
return 0;
}
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int imx_media_add_internal_subdevs(struct imx_media_dev *imxmd)
{
int ret;
ret = add_ipu_internal_subdevs(imxmd, 0);
if (ret)
goto remove;
ret = add_ipu_internal_subdevs(imxmd, 1);
if (ret)
goto remove;
return 0;
remove:
imx_media_remove_internal_subdevs(imxmd);
return ret;
}
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void imx_media_remove_internal_subdevs(struct imx_media_dev *imxmd)
{
struct imx_media_async_subdev *imxasd;
list_for_each_entry(imxasd, &imxmd->asd_list, list) {
if (!imxasd->pdev)
continue;
platform_device_unregister(imxasd->pdev);
}
}
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