LXR linux/drivers/staging/media/atomisp/pci/isp/kernels/macc/macc1_5/ia_css_macc1_5

   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_MACC1_5_TYPES_H
  17#define __IA_CSS_MACC1_5_TYPES_H
  18
  19/* @file
  20* CSS-API header file for Multi-Axis Color Conversion algorithm parameters.
  21*/
  22
  23/* Multi-Axis Color Conversion configuration
  24 *
  25 * ISP2.6.1: MACC1_5 is used.
  26 */
  27
  28/* Number of axes in the MACC table. */
  29#define IA_CSS_MACC_NUM_AXES           16
  30/* Number of coefficients per MACC axes. */
  31#define IA_CSS_MACC_NUM_COEFS          4
  32
  33/* Multi-Axes Color Correction (MACC) table.
  34 *
  35 *  ISP block: MACC (MACC by only matrix)
  36 *             MACC1_5 (MACC by matrix and exponent(ia_css_macc_config))
  37 *  ISP1: MACC is used.
  38 *  ISP2: MACC1_5 is used.
  39 *
  40 *  [MACC]
  41 *   OutU = (data00 * InU + data01 * InV) >> 13
  42 *   OutV = (data10 * InU + data11 * InV) >> 13
  43 *
  44 *   default/ineffective:
  45 *   OutU = (8192 * InU +    0 * InV) >> 13
  46 *   OutV = (   0 * InU + 8192 * InV) >> 13
  47 *
  48 *  [MACC1_5]
  49 *   OutU = (data00 * InU + data01 * InV) >> (13 - exp)
  50 *   OutV = (data10 * InU + data11 * InV) >> (13 - exp)
  51 *
  52 *   default/ineffective: (exp=1)
  53 *   OutU = (4096 * InU +    0 * InV) >> (13 - 1)
  54 *   OutV = (   0 * InU + 4096 * InV) >> (13 - 1)
  55 */
  56struct ia_css_macc1_5_table {
  57        s16 data[IA_CSS_MACC_NUM_COEFS * IA_CSS_MACC_NUM_AXES];
  58        /** 16 of 2x2 matix
  59          MACC1_5: 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/* Multi-Axes Color Correction (MACC) configuration.
  65 *
  66 *  ISP block: MACC1_5 (MACC by matrix and exponent(ia_css_macc_config))
  67 *  ISP2: MACC1_5 is used.
  68 */
  69struct ia_css_macc1_5_config {
  70        u8 exp; /** Common exponent of ia_css_macc_table.
  71                                u8.0, [0,13], default 1, ineffective 1 */
  72};
  73
  74#endif /* __IA_CSS_MACC1_5_TYPES_H */
  75