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// SPDX-License-Identifier: GPL-2.0+
/*
* vsp1_iif.c -- R-Car VSP1 IIF (ISP Interface)
*
* Copyright (C) 2025 Ideas On Board Oy
* Copyright (C) 2025 Renesas Corporation
*/
#include "vsp1.h"
#include "vsp1_dl.h"
#include "vsp1_iif.h"
#define IIF_MIN_WIDTH 128U
#define IIF_MIN_HEIGHT 32U
#define IIF_MAX_WIDTH 5120U
#define IIF_MAX_HEIGHT 4096U
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline void vsp1_iif_write(struct vsp1_dl_body *dlb, u32 reg, u32 data)
{
vsp1_dl_body_write(dlb, reg, data);
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Operations
*/
static const unsigned int iif_codes[] = {
MEDIA_BUS_FMT_Y8_1X8,
MEDIA_BUS_FMT_Y10_1X10,
MEDIA_BUS_FMT_Y12_1X12,
MEDIA_BUS_FMT_Y16_1X16,
MEDIA_BUS_FMT_METADATA_FIXED
};
static int iif_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, iif_codes,
ARRAY_SIZE(iif_codes));
}
static int iif_enum_frame_size(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
IIF_MIN_WIDTH, IIF_MIN_HEIGHT,
IIF_MAX_WIDTH, IIF_MAX_HEIGHT);
}
static int iif_set_format(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, iif_codes,
ARRAY_SIZE(iif_codes),
IIF_MIN_WIDTH, IIF_MIN_HEIGHT,
IIF_MAX_WIDTH, IIF_MAX_HEIGHT);
}
static const struct v4l2_subdev_pad_ops iif_pad_ops = {
.enum_mbus_code = iif_enum_mbus_code,
.enum_frame_size = iif_enum_frame_size,
.get_fmt = vsp1_subdev_get_pad_format,
.set_fmt = iif_set_format,
};
static const struct v4l2_subdev_ops iif_ops = {
.pad = &iif_pad_ops,
};
/* -----------------------------------------------------------------------------
* VSP1 Entity Operations
*/
static void iif_configure_stream(struct vsp1_entity *entity,
struct v4l2_subdev_state *state,
struct vsp1_pipeline *pipe,
struct vsp1_dl_list *dl,
struct vsp1_dl_body *dlb)
{
vsp1_iif_write(dlb, VI6_IIF_CTRL, VI6_IIF_CTRL_CTRL);
}
static const struct vsp1_entity_operations iif_entity_ops = {
.configure_stream = iif_configure_stream,
};
/* -----------------------------------------------------------------------------
* Initialization and Cleanup
*/
struct vsp1_iif *vsp1_iif_create(struct vsp1_device *vsp1)
{
struct vsp1_iif *iif;
int ret;
iif = devm_kzalloc(vsp1->dev, sizeof(*iif), GFP_KERNEL);
if (!iif)
return ERR_PTR(-ENOMEM);
iif->entity.ops = &iif_entity_ops;
iif->entity.type = VSP1_ENTITY_IIF;
/*
* The IIF is never exposed to userspace, but media entity registration
* requires a function to be set. Use PROC_VIDEO_PIXEL_FORMATTER just to
* avoid triggering a WARN_ON(), the value won't be seen anywhere.
*/
ret = vsp1_entity_init(vsp1, &iif->entity, "iif", 3, &iif_ops,
MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
if (ret < 0)
return ERR_PTR(ret);
return iif;
}
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