# 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.
#

menuconfig MODULE_ESP_LCD
    bool "Enable LCD low-level parallel interface driver"
    depends on MODULE_LCD
    default y if HAVE_LCD_PARALLEL_LL_MCU
    help
        Enabe the MCU-driven low-level MCU 8080 8-/16-bit parallel interface
        driver.

if MODULE_ESP_LCD

config MODULE_ESP_LCD_GPIO
    bool "GPIO-driven low-level parallel interface driver"
    depends on !CPU_FAM_ESP32 && !CPU_FAM_ESP32S2 && !CPU_FAM_ESP32S3
    default y
    help
        The ESP32x SoC variant used does not have a peripheral for the parallel
        low-level interface. However, it can be emulated with special low-level
        GPIO operations. It is faster than the GPIO-driven 8-/16-bit parallel
        interface implemented in the LCD driver, but requires 4 kByte RAM for
        8-bit data bus width and 8 kByte RAM for 16-bit data bus width.

config LCD_WRITE_CLOCK_MHZ
    int "LCD write clock rate in MHz"
    range 1 80
    depends on CPU_FAM_ESP32 || CPU_FAM_ESP32S2 || CPU_FAM_ESP32S3
    default 10 if CPU_FAM_ESP32
    default 40 if CPU_FAM_ESP32S2
    default 20 if CPU_FAM_ESP32S3
    help
        Defines the clock rate that is used for the LCD write signal. It
        depends on used ESP32x SoC variant and used display interface.

config LCD_DATA_BUF_SIZE
    int "LCD data buffer size in byte"
    depends on CPU_FAM_ESP32 || CPU_FAM_ESP32S2 || CPU_FAM_ESP32S3
    default 512
    help
        Defines the size of the buffers used to write data to the LCD
        screen. Since double buffering is used, there are two buffers
        of this size. One buffer is used first by the LCD driver to
        write the data that needs to be transferred to the LCD, and
        one buffer from which the DMA then transfers the data to the
        LCD peripherals. This allows data to be written before the
        DMA transfer is complete. The larger the buffers, the better
        the performance, but the higher the memory requirements.

endif