/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (c) 2019 Microchip Technology Inc. and its subsidiaries * * Author: Eugen Hristev <[email protected]> */ #ifndef __LINUX_ATMEL_ISC_MEDIA_H__ #define __LINUX_ATMEL_ISC_MEDIA_H__ /* * There are 8 controls available: * 4 gain controls, sliders, for each of the BAYER components: R, B, GR, GB. * These gains are multipliers for each component, in format unsigned 0:4:9 with * a default value of 512 (1.0 multiplier). * 4 offset controls, sliders, for each of the BAYER components: R, B, GR, GB. * These offsets are added/substracted from each component, in format signed * 1:12:0 with a default value of 0 (+/- 0) * * To expose this to userspace, added 8 custom controls, in an auto cluster. * * To summarize the functionality: * The auto cluster switch is the auto white balance control, and it works * like this: * AWB == 1: autowhitebalance is on, the do_white_balance button is inactive, * the gains/offsets are inactive, but volatile and readable. * Thus, the results of the whitebalance algorithm are available to userspace to * read at any time. * AWB == 0: autowhitebalance is off, cluster is in manual mode, user can * configure the gain/offsets directly. * More than that, if the do_white_balance button is * pressed, the driver will perform one-time-adjustment, (preferably with color * checker card) and the userspace can read again the new values. * * With this feature, the userspace can save the coefficients and reinstall them * for example after reboot or reprobing the driver. */ enum atmel_isc_ctrl_id { … }; #endif
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