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/*
* vsp1_sru.c -- R-Car VSP1 Super Resolution Unit
*
* Copyright (C) 2013 Renesas Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* 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/device.h>
#include <linux/gfp.h>
#include <media/v4l2-subdev.h>
#include "vsp1.h"
#include "vsp1_sru.h"
#define SRU_MIN_SIZE 4U
#define SRU_MAX_SIZE 8190U
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline u32 vsp1_sru_read(struct vsp1_sru *sru, u32 reg)
{
return vsp1_read(sru->entity.vsp1, reg);
}
static inline void vsp1_sru_write(struct vsp1_sru *sru, u32 reg, u32 data)
{
vsp1_write(sru->entity.vsp1, reg, data);
}
/* -----------------------------------------------------------------------------
* Controls
*/
#define V4L2_CID_VSP1_SRU_INTENSITY (V4L2_CID_USER_BASE + 1)
struct vsp1_sru_param {
u32 ctrl0;
u32 ctrl2;
};
#define VI6_SRU_CTRL0_PARAMS(p0, p1) \
(((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) | \
((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))
#define VI6_SRU_CTRL2_PARAMS(p6, p7, p8) \
(((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) | \
((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) | \
((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))
static const struct vsp1_sru_param vsp1_sru_params[] = {
{
.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
.ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
}, {
.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
.ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
}, {
.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
.ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
}, {
.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
.ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
}, {
.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
.ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
}, {
.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
.ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
},
};
static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct vsp1_sru *sru =
container_of(ctrl->handler, struct vsp1_sru, ctrls);
const struct vsp1_sru_param *param;
u32 value;
switch (ctrl->id) {
case V4L2_CID_VSP1_SRU_INTENSITY:
param = &vsp1_sru_params[ctrl->val - 1];
value = vsp1_sru_read(sru, VI6_SRU_CTRL0);
value &= ~(VI6_SRU_CTRL0_PARAM0_MASK |
VI6_SRU_CTRL0_PARAM1_MASK);
value |= param->ctrl0;
vsp1_sru_write(sru, VI6_SRU_CTRL0, value);
vsp1_sru_write(sru, VI6_SRU_CTRL2, param->ctrl2);
break;
}
return 0;
}
static const struct v4l2_ctrl_ops sru_ctrl_ops = {
.s_ctrl = sru_s_ctrl,
};
static const struct v4l2_ctrl_config sru_intensity_control = {
.ops = &sru_ctrl_ops,
.id = V4L2_CID_VSP1_SRU_INTENSITY,
.name = "Intensity",
.type = V4L2_CTRL_TYPE_INTEGER,
.min = 1,
.max = 6,
.def = 1,
.step = 1,
};
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Core Operations
*/
static int sru_s_stream(struct v4l2_subdev *subdev, int enable)
{
struct vsp1_sru *sru = to_sru(subdev);
struct v4l2_mbus_framefmt *input;
struct v4l2_mbus_framefmt *output;
u32 ctrl0;
int ret;
ret = vsp1_entity_set_streaming(&sru->entity, enable);
if (ret < 0)
return ret;
if (!enable)
return 0;
input = &sru->entity.formats[SRU_PAD_SINK];
output = &sru->entity.formats[SRU_PAD_SOURCE];
if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
ctrl0 = VI6_SRU_CTRL0_PARAM2 | VI6_SRU_CTRL0_PARAM3
| VI6_SRU_CTRL0_PARAM4;
else
ctrl0 = VI6_SRU_CTRL0_PARAM3;
if (input->width != output->width)
ctrl0 |= VI6_SRU_CTRL0_MODE_UPSCALE;
/* Take the control handler lock to ensure that the CTRL0 value won't be
* changed behind our back by a set control operation.
*/
if (sru->entity.vsp1->pdata.uapi)
mutex_lock(sru->ctrls.lock);
ctrl0 |= vsp1_sru_read(sru, VI6_SRU_CTRL0)
& (VI6_SRU_CTRL0_PARAM0_MASK | VI6_SRU_CTRL0_PARAM1_MASK);
vsp1_sru_write(sru, VI6_SRU_CTRL0, ctrl0);
if (sru->entity.vsp1->pdata.uapi)
mutex_unlock(sru->ctrls.lock);
vsp1_sru_write(sru, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
return 0;
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Pad Operations
*/
static int sru_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
static const unsigned int codes[] = {
MEDIA_BUS_FMT_ARGB8888_1X32,
MEDIA_BUS_FMT_AYUV8_1X32,
};
struct vsp1_sru *sru = to_sru(subdev);
struct v4l2_mbus_framefmt *format;
if (code->pad == SRU_PAD_SINK) {
if (code->index >= ARRAY_SIZE(codes))
return -EINVAL;
code->code = codes[code->index];
} else {
/* The SRU can't perform format conversion, the sink format is
* always identical to the source format.
*/
if (code->index)
return -EINVAL;
format = vsp1_entity_get_pad_format(&sru->entity, cfg,
SRU_PAD_SINK, code->which);
code->code = format->code;
}
return 0;
}
static int sru_enum_frame_size(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
struct vsp1_sru *sru = to_sru(subdev);
struct v4l2_mbus_framefmt *format;
format = vsp1_entity_get_pad_format(&sru->entity, cfg,
SRU_PAD_SINK, fse->which);
if (fse->index || fse->code != format->code)
return -EINVAL;
if (fse->pad == SRU_PAD_SINK) {
fse->min_width = SRU_MIN_SIZE;
fse->max_width = SRU_MAX_SIZE;
fse->min_height = SRU_MIN_SIZE;
fse->max_height = SRU_MAX_SIZE;
} else {
fse->min_width = format->width;
fse->min_height = format->height;
if (format->width <= SRU_MAX_SIZE / 2 &&
format->height <= SRU_MAX_SIZE / 2) {
fse->max_width = format->width * 2;
fse->max_height = format->height * 2;
} else {
fse->max_width = format->width;
fse->max_height = format->height;
}
}
return 0;
}
static int sru_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct vsp1_sru *sru = to_sru(subdev);
fmt->format = *vsp1_entity_get_pad_format(&sru->entity, cfg, fmt->pad,
fmt->which);
return 0;
}
static void sru_try_format(struct vsp1_sru *sru, struct v4l2_subdev_pad_config *cfg,
unsigned int pad, struct v4l2_mbus_framefmt *fmt,
enum v4l2_subdev_format_whence which)
{
struct v4l2_mbus_framefmt *format;
unsigned int input_area;
unsigned int output_area;
switch (pad) {
case SRU_PAD_SINK:
/* Default to YUV if the requested format is not supported. */
if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
fmt->code !=
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