cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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atmel-isc-media.h (2115B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (c) 2019 Microchip Technology Inc. and its subsidiaries
      4 *
      5 * Author: Eugen Hristev <eugen.hristev@microchip.com>
      6 */
      7
      8#ifndef __LINUX_ATMEL_ISC_MEDIA_H__
      9#define __LINUX_ATMEL_ISC_MEDIA_H__
     10
     11/*
     12 * There are 8 controls available:
     13 * 4 gain controls, sliders, for each of the BAYER components: R, B, GR, GB.
     14 * These gains are multipliers for each component, in format unsigned 0:4:9 with
     15 * a default value of 512 (1.0 multiplier).
     16 * 4 offset controls, sliders, for each of the BAYER components: R, B, GR, GB.
     17 * These offsets are added/substracted from each component, in format signed
     18 * 1:12:0 with a default value of 0 (+/- 0)
     19 *
     20 * To expose this to userspace, added 8 custom controls, in an auto cluster.
     21 *
     22 * To summarize the functionality:
     23 * The auto cluster switch is the auto white balance control, and it works
     24 * like this:
     25 * AWB == 1: autowhitebalance is on, the do_white_balance button is inactive,
     26 * the gains/offsets are inactive, but volatile and readable.
     27 * Thus, the results of the whitebalance algorithm are available to userspace to
     28 * read at any time.
     29 * AWB == 0: autowhitebalance is off, cluster is in manual mode, user can
     30 * configure the gain/offsets directly.
     31 * More than that, if the do_white_balance button is
     32 * pressed, the driver will perform one-time-adjustment, (preferably with color
     33 * checker card) and the userspace can read again the new values.
     34 *
     35 * With this feature, the userspace can save the coefficients and reinstall them
     36 * for example after reboot or reprobing the driver.
     37 */
     38
     39enum atmel_isc_ctrl_id {
     40	/* Red component gain control */
     41	ISC_CID_R_GAIN = (V4L2_CID_USER_ATMEL_ISC_BASE + 0),
     42	/* Blue component gain control */
     43	ISC_CID_B_GAIN,
     44	/* Green Red component gain control */
     45	ISC_CID_GR_GAIN,
     46	/* Green Blue gain control */
     47	ISC_CID_GB_GAIN,
     48	/* Red component offset control */
     49	ISC_CID_R_OFFSET,
     50	/* Blue component offset control */
     51	ISC_CID_B_OFFSET,
     52	/* Green Red component offset control */
     53	ISC_CID_GR_OFFSET,
     54	/* Green Blue component offset control */
     55	ISC_CID_GB_OFFSET,
     56};
     57
     58#endif