# Copyright (c) 2023 Gunar Schorcht
#
# This file is subject to the terms and conditions of the GNU Lesser
# General Public License v2.1. See the file LICENSE in the top level
# directory for more details.
#

if MODULE_ST77XX

config MODULE_ST7789
    bool "ST7789 display"
    default y if HAVE_ST7789
    help
        ST7789 display controller is used

if MODULE_ST7789

menuconfig ST7789_CUSTOM_CONFIG
    bool "ST7789 Custom Configuration"
    help
        Enable if customized configuration of voltages are needed. Otherwise
        reset default values are used.

if ST7789_CUSTOM_CONFIG

config ST7789_AVDD
    int "AVDD voltage (in millivolts)"
    default 6600
    range 6400 6800
    help
        Configure the AVDD voltage for analog circuits in millivolts.
        Valid values must be in the range of 6400 (6.4V) to 6800 (6.8V)
        in steps of 200.

config ST7789_AVCL
    int "AVDD voltage (in millivolts)"
    default -4400
    range -5000 -4400
    help
        Configure the AVCL voltage in millivolts.
        Valid values must be in the range of -5000 (-5V) to -4400 (-4.4V)
        in steps of 200.

config ST7789_VCOM
    int "VCOM voltage (in millivolts)"
    default 900
    range 100 1675
    help
        Configure the VCOM voltage level. VCOM needs to be adjusted
        to match the capacitance and performance specifications of the TFT panel
        to maximize contrast and minimize flickering. VCOM is used to derive
        the GVDD (gamma reference positive voltage) and the GVCL (gamma
        reference negative voltage) as follows:

            GDDV = +VRH + VCOM + VCOM_OFFSET + (0.5 * VDV)
            GVCL = -VRH + VCOM + VCOM_OFFSET - (0.5 * VDV)

        Valid values must be in the range of 100 (0.1V) to 1675 (1.675V)
        in steps of 25.

config ST7789_VCOM_OFFSET
    int "VCOM voltage offset (in millivolts)"
    default 0
    range -800 775
    help
        Configure the VCOM voltage offset (VCOM_OFFSET). VCOM_OFFSET is used to
        derive the GVDD (gamma reference positive voltage) and the GVCL (gamma
        reference negative voltage) as follows:

            GDDV = +VRH + VCOM + VCOM_OFFSET + (0.5 * VDV)
            GVCL = -VRH + VCOM + VCOM_OFFSET - (0.5 * VDV)

        Valid values must be in the range of -800 (-0.8V) to 775 (0.775V)
        in steps of 25.

config ST7789_VDV
    int "VDV voltage offset factor (in millivolts)"
    default 0
    range -800 775
    help
        Configure the VDV voltage offset factor. VDV is used to derive the GVDD
        (gamma reference positive voltage) and the GVCL (gamma reference
        negative voltage) as follows:

            GDDV = +VRH + VCOM + VCOM_OFFSET + (0.5 * VDV)
            GVCL = -VRH + VCOM + VCOM_OFFSET - (0.5 * VDV)

        Valid values must be in the range of -800 (-0.8V) to 775 (0.775V)
        in steps of 25.

config ST7789_VRH
    int "VRH voltage range (in millivolts)"
    default 4100
    range 3550 5500
    help
        Configure the VRH voltage range. VRH is used to derive the GVDD (gamma
        reference positive voltage) and the GVCL (gamma reference negative
        voltage) as follows:

            GDDV = +VRH + VCOM + VCOM_OFFSET + (0.5 * VDV)
            GVCL = -VRH + VCOM + VCOM_OFFSET - (0.5 * VDV)

        Valid values must be in the range of 3350 (3.35V) to 5500 (5.5V)
        in steps of 50.

# TODO  ST7789_VGH and ST7789_VGL (non linear values)

endif # ST7789_CUSTOM_CONFIG
endif # MODULE_ST7789
endif # MODULE_ST77XX