LXR linux/drivers/staging/media/atomisp/pci/isp/kernels/macc/macc_1.0/ia_css_macc

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Support for Intel Camera Imaging ISP subsystem.
   4 * Copyright (c) 2015, Intel Corporation.
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms and conditions of the GNU General Public License,
   8 * version 2, as published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope it will be useful, but WITHOUT
  11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13 * more details.
  14 */
  15
  16#ifndef __IA_CSS_MACC_TYPES_H
  17#define __IA_CSS_MACC_TYPES_H
  18
  19/* @file
  20* CSS-API header file for Multi-Axis Color Correction (MACC) parameters.
  21*/
  22
  23/* Number of axes in the MACC table. */
  24#define IA_CSS_MACC_NUM_AXES           16
  25/* Number of coefficients per MACC axes. */
  26#define IA_CSS_MACC_NUM_COEFS          4
  27/* The number of planes in the morphing table. */
  28
  29/* Multi-Axis Color Correction (MACC) table.
  30 *
  31 *  ISP block: MACC1 (MACC by only matrix)
  32 *             MACC2 (MACC by matrix and exponent(ia_css_macc_config))
  33 *  ISP1: MACC1 is used.
  34 *  ISP2: MACC2 is used.
  35 *
  36 *  [MACC1]
  37 *   OutU = (data00 * InU + data01 * InV) >> 13
  38 *   OutV = (data10 * InU + data11 * InV) >> 13
  39 *
  40 *   default/ineffective:
  41 *   OutU = (8192 * InU +    0 * InV) >> 13
  42 *   OutV = (   0 * InU + 8192 * InV) >> 13
  43 *
  44 *  [MACC2]
  45 *   OutU = (data00 * InU + data01 * InV) >> (13 - exp)
  46 *   OutV = (data10 * InU + data11 * InV) >> (13 - exp)
  47 *
  48 *   default/ineffective: (exp=1)
  49 *   OutU = (4096 * InU +    0 * InV) >> (13 - 1)
  50 *   OutV = (   0 * InU + 4096 * InV) >> (13 - 1)
  51 */
  52
  53struct ia_css_macc_table {
  54        s16 data[IA_CSS_MACC_NUM_COEFS * IA_CSS_MACC_NUM_AXES];
  55        /** 16 of 2x2 matix
  56          MACC1: s2.13, [-65536,65535]
  57            default/ineffective:
  58                16 of "identity 2x2 matix" {8192,0,0,8192}
  59          MACC2: s[macc_config.exp].[13-macc_config.exp], [-8192,8191]
  60            default/ineffective: (s1.12)
  61                16 of "identity 2x2 matix" {4096,0,0,4096} */
  62};
  63
  64#endif /* __IA_CSS_MACC_TYPES_H */
  65