linux/drivers/staging/media/atomisp/pci/isp/kernels/ctc/ctc2/ia_css_ctc2.host.c

// 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 "ia_css_types.h"
#include "sh_css_defs.h"
#include "assert_support.h"

#include "ia_css_ctc2.host.h"

#define INEFFECTIVE_VAL …
#define BASIC_VAL …

/*Default configuration of parameters for Ctc2*/
const struct ia_css_ctc2_config default_ctc2_config = …;

/* (dydx) = ctc2_slope(y1, y0, x1, x0)
 * -----------------------------------------------
 * Calculation of the Slope of a Line = ((y1 - y0) >> 8)/(x1 - x0)
 *
 * Note: y1, y0 , x1 & x0 must lie within the range 0 <-> 8191
 */
static int ctc2_slope(int y1, int y0, int x1, int x0)
{ … }

/* (void) = ia_css_ctc2_vmem_encode(*to, *from)
 * -----------------------------------------------
 * VMEM Encode Function to translate Y parameters from userspace into ISP space
 */
void ia_css_ctc2_vmem_encode(struct ia_css_isp_ctc2_vmem_params *to,
			     const struct ia_css_ctc2_config *from,
			     size_t size)
{ … }

/* (void) = ia_css_ctc2_encode(*to, *from)
 * -----------------------------------------------
 * DMEM Encode Function to translate UV parameters from userspace into ISP space
 */
void ia_css_ctc2_encode(struct ia_css_isp_ctc2_dmem_params *to,
			struct ia_css_ctc2_config *from,
			size_t size)
{ … }