// SPDX-License-Identifier: GPL-2.0+
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/*
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* vsp1_hsit.c -- R-Car VSP1 Hue Saturation value (Inverse) Transform
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*
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* Copyright (C) 2013 Renesas Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*/
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#include <linux/device.h>
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#include <linux/gfp.h>
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#include <media/v4l2-subdev.h>
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#include "vsp1.h"
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#include "vsp1_dl.h"
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#include "vsp1_hsit.h"
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#define HSIT_MIN_SIZE 4U
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#define HSIT_MAX_SIZE 8190U
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/* -----------------------------------------------------------------------------
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* Device Access
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*/
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static inline void vsp1_hsit_write(struct vsp1_hsit *hsit,
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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 int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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struct vsp1_hsit *hsit = to_hsit(subdev);
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if (code->index > 0)
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return -EINVAL;
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if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
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(code->pad == HSIT_PAD_SOURCE && hsit->inverse))
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code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
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else
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code->code = MEDIA_BUS_FMT_AHSV8888_1X32;
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return 0;
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}
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static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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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, cfg, fse, HSIT_MIN_SIZE,
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HSIT_MIN_SIZE, HSIT_MAX_SIZE,
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HSIT_MAX_SIZE);
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}
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static int hsit_set_format(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *fmt)
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{
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struct vsp1_hsit *hsit = to_hsit(subdev);
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struct v4l2_subdev_pad_config *config;
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struct v4l2_mbus_framefmt *format;
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int ret = 0;
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mutex_lock(&hsit->entity.lock);
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config = vsp1_entity_get_pad_config(&hsit->entity, cfg, fmt->which);
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if (!config) {
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ret = -EINVAL;
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goto done;
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}
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format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad);
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if (fmt->pad == HSIT_PAD_SOURCE) {
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/*
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* The HST and HSI output format code and resolution can't be
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* modified.
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*/
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fmt->format = *format;
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goto done;
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}
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format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
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: MEDIA_BUS_FMT_ARGB8888_1X32;
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format->width = clamp_t(unsigned int, fmt->format.width,
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HSIT_MIN_SIZE, HSIT_MAX_SIZE);
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format->height = clamp_t(unsigned int, fmt->format.height,
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HSIT_MIN_SIZE, HSIT_MAX_SIZE);
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format->field = V4L2_FIELD_NONE;
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format->colorspace = V4L2_COLORSPACE_SRGB;
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fmt->format = *format;
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/* Propagate the format to the source pad. */
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format = vsp1_entity_get_pad_format(&hsit->entity, config,
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HSIT_PAD_SOURCE);
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*format = fmt->format;
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format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
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: MEDIA_BUS_FMT_AHSV8888_1X32;
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done:
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mutex_unlock(&hsit->entity.lock);
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return ret;
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}
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static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
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.init_cfg = vsp1_entity_init_cfg,
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.enum_mbus_code = hsit_enum_mbus_code,
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.enum_frame_size = hsit_enum_frame_size,
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.get_fmt = vsp1_subdev_get_pad_format,
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.set_fmt = hsit_set_format,
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};
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static const struct v4l2_subdev_ops hsit_ops = {
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.pad = &hsit_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 hsit_configure_stream(struct vsp1_entity *entity,
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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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struct vsp1_hsit *hsit = to_hsit(&entity->subdev);
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if (hsit->inverse)
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vsp1_hsit_write(hsit, dlb, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
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else
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vsp1_hsit_write(hsit, dlb, VI6_HST_CTRL, VI6_HST_CTRL_EN);
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}
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static const struct vsp1_entity_operations hsit_entity_ops = {
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.configure_stream = hsit_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_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
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{
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struct vsp1_hsit *hsit;
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int ret;
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hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
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if (hsit == NULL)
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return ERR_PTR(-ENOMEM);
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hsit->inverse = inverse;
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hsit->entity.ops = &hsit_entity_ops;
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if (inverse)
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hsit->entity.type = VSP1_ENTITY_HSI;
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else
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hsit->entity.type = VSP1_ENTITY_HST;
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ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst",
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2, &hsit_ops,
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MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV);
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if (ret < 0)
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return ERR_PTR(ret);
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return hsit;
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}
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