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7305ee12b2
The IIF (ISP InterFace) is a VSP2 function that transfers data to the ISP by reading from external memory through two RPF instances. Add support for it in the vsp1 driver by introducing a new entity type. The sole required operation is to enable the IIF function during configure_stream(). Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Tested-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo.mondi+renesas@ideasonboard.com> Link: https://lore.kernel.org/r/20250401-v4h-iif-v7-1-cc547c0bddd5@ideasonboard.com Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* vsp1_iif.c -- R-Car VSP1 IIF (ISP Interface)
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*
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* Copyright (C) 2025 Ideas On Board Oy
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* Copyright (C) 2025 Renesas Corporation
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*/
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#include "vsp1.h"
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#include "vsp1_dl.h"
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#include "vsp1_iif.h"
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#define IIF_MIN_WIDTH 128U
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#define IIF_MIN_HEIGHT 32U
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#define IIF_MAX_WIDTH 5120U
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#define IIF_MAX_HEIGHT 4096U
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/* -----------------------------------------------------------------------------
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* Device Access
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*/
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static inline void vsp1_iif_write(struct vsp1_dl_body *dlb, u32 reg, u32 data)
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{
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vsp1_dl_body_write(dlb, reg, data);
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}
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/* -----------------------------------------------------------------------------
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* V4L2 Subdevice Operations
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*/
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static const unsigned int iif_codes[] = {
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MEDIA_BUS_FMT_Y8_1X8,
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MEDIA_BUS_FMT_Y10_1X10,
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MEDIA_BUS_FMT_Y12_1X12,
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MEDIA_BUS_FMT_Y16_1X16,
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MEDIA_BUS_FMT_METADATA_FIXED
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};
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static int iif_enum_mbus_code(struct v4l2_subdev *subdev,
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struct v4l2_subdev_state *sd_state,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, iif_codes,
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ARRAY_SIZE(iif_codes));
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}
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static int iif_enum_frame_size(struct v4l2_subdev *subdev,
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struct v4l2_subdev_state *sd_state,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
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IIF_MIN_WIDTH, IIF_MIN_HEIGHT,
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IIF_MAX_WIDTH, IIF_MAX_HEIGHT);
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}
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static int iif_set_format(struct v4l2_subdev *subdev,
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struct v4l2_subdev_state *sd_state,
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struct v4l2_subdev_format *fmt)
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{
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return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, iif_codes,
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ARRAY_SIZE(iif_codes),
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IIF_MIN_WIDTH, IIF_MIN_HEIGHT,
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IIF_MAX_WIDTH, IIF_MAX_HEIGHT);
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}
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static const struct v4l2_subdev_pad_ops iif_pad_ops = {
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.enum_mbus_code = iif_enum_mbus_code,
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.enum_frame_size = iif_enum_frame_size,
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.get_fmt = vsp1_subdev_get_pad_format,
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.set_fmt = iif_set_format,
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};
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static const struct v4l2_subdev_ops iif_ops = {
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.pad = &iif_pad_ops,
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};
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/* -----------------------------------------------------------------------------
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* VSP1 Entity Operations
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*/
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static void iif_configure_stream(struct vsp1_entity *entity,
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struct v4l2_subdev_state *state,
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struct vsp1_pipeline *pipe,
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struct vsp1_dl_list *dl,
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struct vsp1_dl_body *dlb)
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{
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vsp1_iif_write(dlb, VI6_IIF_CTRL, VI6_IIF_CTRL_CTRL);
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}
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static const struct vsp1_entity_operations iif_entity_ops = {
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.configure_stream = iif_configure_stream,
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};
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/* -----------------------------------------------------------------------------
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* Initialization and Cleanup
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*/
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struct vsp1_iif *vsp1_iif_create(struct vsp1_device *vsp1)
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{
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struct vsp1_iif *iif;
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int ret;
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iif = devm_kzalloc(vsp1->dev, sizeof(*iif), GFP_KERNEL);
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if (!iif)
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return ERR_PTR(-ENOMEM);
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iif->entity.ops = &iif_entity_ops;
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iif->entity.type = VSP1_ENTITY_IIF;
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/*
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* The IIF is never exposed to userspace, but media entity registration
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* requires a function to be set. Use PROC_VIDEO_PIXEL_FORMATTER just to
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* avoid triggering a WARN_ON(), the value won't be seen anywhere.
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*/
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ret = vsp1_entity_init(vsp1, &iif->entity, "iif", 3, &iif_ops,
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MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
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if (ret < 0)
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return ERR_PTR(ret);
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return iif;
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}
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