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// SPDX-License-Identifier: GPL-2.0
/*
* Support for Intel Camera Imaging ISP subsystem.
* Copyright (c) 2015, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include "atomisp_internal.h"
#include "ia_css_vf.host.h"
#include <assert_support.h>
#include <ia_css_err.h>
#include <ia_css_frame.h>
#include <ia_css_frame_public.h>
#include <ia_css_pipeline.h>
#define IA_CSS_INCLUDE_CONFIGURATIONS
#include "ia_css_isp_configs.h"
#include "isp.h"
void
ia_css_vf_config(
struct sh_css_isp_vf_isp_config *to,
const struct ia_css_vf_configuration *from,
unsigned int size)
{
unsigned int elems_a = ISP_VEC_NELEMS;
(void)size;
to->vf_downscale_bits = from->vf_downscale_bits;
to->enable = from->info != NULL;
if (from->info) {
ia_css_frame_info_to_frame_sp_info(&to->info, from->info);
ia_css_dma_configure_from_info(&to->dma.port_b, from->info);
to->dma.width_a_over_b = elems_a / to->dma.port_b.elems;
/* Assume divisiblity here, may need to generalize to fixed point. */
assert(elems_a % to->dma.port_b.elems == 0);
}
}
/* compute the log2 of the downscale factor needed to get closest
* to the requested viewfinder resolution on the upper side. The output cannot
* be smaller than the requested viewfinder resolution.
*/
int
sh_css_vf_downscale_log2(
const struct ia_css_frame_info *out_info,
const struct ia_css_frame_info *vf_info,
unsigned int *downscale_log2) {
unsigned int ds_log2 = 0;
unsigned int out_width;
if ((!out_info) || (!vf_info))
return -EINVAL;
out_width = out_info->res.width;
if (out_width == 0)
return -EINVAL;
/* downscale until width smaller than the viewfinder width. We don't
* test for the height since the vmem buffers only put restrictions on
* the width of a line, not on the number of lines in a frame.
*/
while (out_width >= vf_info->res.width)
{
ds_log2++;
out_width /= 2;
}
/* now width is smaller, so we go up one step */
if ((ds_log2 > 0) && (out_width < ia_css_binary_max_vf_width()))
ds_log2--;
/* TODO: use actual max input resolution of vf_pp binary */
if ((out_info->res.width >> ds_log2) >= 2 * ia_css_binary_max_vf_width())
return -EINVAL;
*downscale_log2 = ds_log2;
return 0;
}
static int
configure_kernel(
const struct ia_css_binary_info *info,
const struct ia_css_frame_info *out_info,
const struct ia_css_frame_info *vf_info,
unsigned int *downscale_log2,
struct ia_css_vf_configuration *config) {
int err;
unsigned int vf_log_ds = 0;
/* First compute value */
if (vf_info)
{
err = sh_css_vf_downscale_log2(out_info, vf_info, &vf_log_ds);
if (err)
return err;
}
vf_log_ds = min(vf_log_ds, info->vf_dec.max_log_downscale);
*downscale_log2 = vf_log_ds;
/* Then store it in isp config section */
config->vf_downscale_bits = vf_log_ds;
return 0;
}
static void
configure_dma(
struct ia_css_vf_configuration *config,
const struct ia_css_frame_info *vf_info)
{
config->info = vf_info;
}
int
ia_css_vf_configure(
const struct ia_css_binary *binary,
const struct ia_css_frame_info *out_info,
struct ia_css_frame_info *vf_info,
unsigned int *downscale_log2) {
int err;
struct ia_css_vf_configuration config;
const struct ia_css_binary_info *info = &binary->info->sp;
err = configure_kernel(info, out_info, vf_info, downscale_log2, &config);
if (err)
dev_warn(atomisp_dev, "Couldn't setup downscale\n");
configure_dma(&config, vf_info);
if (vf_info)
vf_info->raw_bit_depth = info->dma.vfdec_bits_per_pixel;
ia_css_configure_vf(binary, &config);
return 0;
}
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