// SPDX-License-Identifier: GPL-2.0+
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/*
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* vsp1_sru.c -- R-Car VSP1 Super Resolution Unit
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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_pipe.h"
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#include "vsp1_sru.h"
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#define SRU_MIN_SIZE 4U
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#define SRU_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_sru_write(struct vsp1_sru *sru,
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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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* Controls
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*/
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#define V4L2_CID_VSP1_SRU_INTENSITY (V4L2_CID_USER_BASE | 0x1001)
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struct vsp1_sru_param {
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u32 ctrl0;
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u32 ctrl2;
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};
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#define VI6_SRU_CTRL0_PARAMS(p0, p1) \
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(((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) | \
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((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))
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#define VI6_SRU_CTRL2_PARAMS(p6, p7, p8) \
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(((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) | \
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((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) | \
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((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))
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static const struct vsp1_sru_param vsp1_sru_params[] = {
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{
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.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
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.ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
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}, {
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.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
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.ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
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}, {
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.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
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.ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
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}, {
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.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
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.ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
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}, {
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.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
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.ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
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}, {
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.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
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.ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
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},
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};
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static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct vsp1_sru *sru =
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container_of(ctrl->handler, struct vsp1_sru, ctrls);
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switch (ctrl->id) {
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case V4L2_CID_VSP1_SRU_INTENSITY:
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sru->intensity = ctrl->val;
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break;
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}
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return 0;
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}
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static const struct v4l2_ctrl_ops sru_ctrl_ops = {
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.s_ctrl = sru_s_ctrl,
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};
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static const struct v4l2_ctrl_config sru_intensity_control = {
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.ops = &sru_ctrl_ops,
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.id = V4L2_CID_VSP1_SRU_INTENSITY,
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.name = "Intensity",
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.type = V4L2_CTRL_TYPE_INTEGER,
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.min = 1,
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.max = 6,
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.def = 1,
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.step = 1,
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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 sru_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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static const unsigned int codes[] = {
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MEDIA_BUS_FMT_ARGB8888_1X32,
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MEDIA_BUS_FMT_AYUV8_1X32,
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};
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return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
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ARRAY_SIZE(codes));
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}
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static int sru_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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struct vsp1_sru *sru = to_sru(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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config = vsp1_entity_get_pad_config(&sru->entity, cfg, fse->which);
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if (!config)
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return -EINVAL;
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format = vsp1_entity_get_pad_format(&sru->entity, config, SRU_PAD_SINK);
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mutex_lock(&sru->entity.lock);
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if (fse->index || fse->code != format->code) {
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ret = -EINVAL;
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goto done;
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}
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if (fse->pad == SRU_PAD_SINK) {
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fse->min_width = SRU_MIN_SIZE;
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fse->max_width = SRU_MAX_SIZE;
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fse->min_height = SRU_MIN_SIZE;
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fse->max_height = SRU_MAX_SIZE;
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} else {
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fse->min_width = format->width;
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fse->min_height = format->height;
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if (format->width <= SRU_MAX_SIZE / 2 &&
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format->height <= SRU_MAX_SIZE / 2) {
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fse->max_width = format->width * 2;
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fse->max_height = format->height * 2;
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} else {
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fse->max_width = format->width;
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fse->max_height = format->height;
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}
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}
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done:
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mutex_unlock(&sru->entity.lock);
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return ret;
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}
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static void sru_try_format(struct vsp1_sru *sru,
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struct v4l2_subdev_pad_config *config,
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unsigned int pad, struct v4l2_mbus_framefmt *fmt)
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{
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struct v4l2_mbus_framefmt *format;
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unsigned int input_area;
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unsigned int output_area;
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switch (pad) {
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case SRU_PAD_SINK:
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/* Default to YUV if the requested format is not supported. */
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if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
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fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
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fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
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fmt->width = clamp(fmt->width, SRU_MIN_SIZE, SRU_MAX_SIZE);
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fmt->height = clamp(fmt->height, SRU_MIN_SIZE, SRU_MAX_SIZE);
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break;
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case SRU_PAD_SOURCE:
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/* The SRU can't perform format conversion. */
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format = vsp1_entity_get_pad_format(&sru->entity, config,
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SRU_PAD_SINK);
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fmt->code = format->code;
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/*
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* We can upscale by 2 in both direction, but not independently.
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* Compare the input and output rectangles areas (avoiding
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* integer overflows on the output): if the requested output
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* area is larger than 1.5^2 the input area upscale by two,
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* otherwise don't scale.
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*/
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input_area = format->width * format->height;
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output_area = min(fmt->width, SRU_MAX_SIZE)
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* min(fmt->height, SRU_MAX_SIZE);
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if (fmt->width <= SRU_MAX_SIZE / 2 &&
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fmt->height <= SRU_MAX_SIZE / 2 &&
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output_area > input_area * 9 / 4) {
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fmt->width = format->width * 2;
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fmt->height = format->height * 2;
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} else {
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fmt->width = format->width;
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fmt->height = format->height;
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}
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break;
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}
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fmt->field = V4L2_FIELD_NONE;
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fmt->colorspace = V4L2_COLORSPACE_SRGB;
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}
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static int sru_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_sru *sru = to_sru(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(&sru->entity.lock);
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config = vsp1_entity_get_pad_config(&sru->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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sru_try_format(sru, config, fmt->pad, &fmt->format);
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format = vsp1_entity_get_pad_format(&sru->entity, config, fmt->pad);
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*format = fmt->format;
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if (fmt->pad == SRU_PAD_SINK) {
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/* Propagate the format to the source pad. */
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format = vsp1_entity_get_pad_format(&sru->entity, config,
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SRU_PAD_SOURCE);
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*format = fmt->format;
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sru_try_format(sru, config, SRU_PAD_SOURCE, format);
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}
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done:
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mutex_unlock(&sru->entity.lock);
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return ret;
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}
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static const struct v4l2_subdev_pad_ops sru_pad_ops = {
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.init_cfg = vsp1_entity_init_cfg,
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.enum_mbus_code = sru_enum_mbus_code,
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.enum_frame_size = sru_enum_frame_size,
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.get_fmt = vsp1_subdev_get_pad_format,
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.set_fmt = sru_set_format,
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};
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static const struct v4l2_subdev_ops sru_ops = {
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.pad = &sru_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 sru_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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const struct vsp1_sru_param *param;
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struct vsp1_sru *sru = to_sru(&entity->subdev);
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struct v4l2_mbus_framefmt *input;
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struct v4l2_mbus_framefmt *output;
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u32 ctrl0;
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input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
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SRU_PAD_SINK);
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output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
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SRU_PAD_SOURCE);
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if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
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ctrl0 = VI6_SRU_CTRL0_PARAM2 | VI6_SRU_CTRL0_PARAM3
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| VI6_SRU_CTRL0_PARAM4;
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else
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ctrl0 = VI6_SRU_CTRL0_PARAM3;
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if (input->width != output->width)
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ctrl0 |= VI6_SRU_CTRL0_MODE_UPSCALE;
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param = &vsp1_sru_params[sru->intensity - 1];
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ctrl0 |= param->ctrl0;
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vsp1_sru_write(sru, dlb, VI6_SRU_CTRL0, ctrl0);
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vsp1_sru_write(sru, dlb, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
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vsp1_sru_write(sru, dlb, VI6_SRU_CTRL2, param->ctrl2);
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}
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static unsigned int sru_max_width(struct vsp1_entity *entity,
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struct vsp1_pipeline *pipe)
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{
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struct vsp1_sru *sru = to_sru(&entity->subdev);
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struct v4l2_mbus_framefmt *input;
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struct v4l2_mbus_framefmt *output;
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input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
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SRU_PAD_SINK);
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output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
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SRU_PAD_SOURCE);
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/*
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* The maximum input width of the SRU is 288 input pixels, but 32
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* pixels are reserved to support overlapping partition windows when
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* scaling.
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*/
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if (input->width != output->width)
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return 512;
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else
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return 256;
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}
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static void sru_partition(struct vsp1_entity *entity,
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struct vsp1_pipeline *pipe,
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struct vsp1_partition *partition,
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unsigned int partition_idx,
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struct vsp1_partition_window *window)
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{
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struct vsp1_sru *sru = to_sru(&entity->subdev);
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struct v4l2_mbus_framefmt *input;
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struct v4l2_mbus_framefmt *output;
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input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
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SRU_PAD_SINK);
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output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
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SRU_PAD_SOURCE);
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/* Adapt if SRUx2 is enabled. */
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if (input->width != output->width) {
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window->width /= 2;
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window->left /= 2;
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}
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partition->sru = *window;
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}
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static const struct vsp1_entity_operations sru_entity_ops = {
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.configure_stream = sru_configure_stream,
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.max_width = sru_max_width,
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.partition = sru_partition,
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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_sru *vsp1_sru_create(struct vsp1_device *vsp1)
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{
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struct vsp1_sru *sru;
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int ret;
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sru = devm_kzalloc(vsp1->dev, sizeof(*sru), GFP_KERNEL);
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if (sru == NULL)
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return ERR_PTR(-ENOMEM);
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sru->entity.ops = &sru_entity_ops;
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sru->entity.type = VSP1_ENTITY_SRU;
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ret = vsp1_entity_init(vsp1, &sru->entity, "sru", 2, &sru_ops,
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MEDIA_ENT_F_PROC_VIDEO_SCALER);
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if (ret < 0)
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return ERR_PTR(ret);
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/* Initialize the control handler. */
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v4l2_ctrl_handler_init(&sru->ctrls, 1);
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v4l2_ctrl_new_custom(&sru->ctrls, &sru_intensity_control, NULL);
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sru->intensity = 1;
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sru->entity.subdev.ctrl_handler = &sru->ctrls;
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if (sru->ctrls.error) {
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dev_err(vsp1->dev, "sru: failed to initialize controls\n");
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ret = sru->ctrls.error;
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vsp1_entity_destroy(&sru->entity);
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return ERR_PTR(ret);
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}
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return sru;
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}
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