Function lcd_gpio_config

bsp/allwinner/libraries/drivers/drv_lcd.c:91–127

set up the lcd pin function */

/* set up the lcd pin function */
static void lcd_gpio_config(void)
{
    int i;
    gpio_pin_t pin;
    gpio_muxsel_t function_index;
    gpio_driving_level_t level;

    if (_panel->bl_pin >= 0)
    {
        hal_gpio_set_direction(_panel->bl_pin, GPIO_DIRECTION_OUTPUT); // bl_pin
        hal_gpio_set_driving_level(_panel->bl_pin, 3);
        hal_gpio_set_data(_panel->bl_pin, _panel->bl_level);
    }

    if (_panel->pwr_pin >= 0)
    {
        hal_gpio_set_direction(_panel->pwr_pin, GPIO_DIRECTION_OUTPUT); // pwr_pin
        hal_gpio_set_driving_level(_panel->pwr_pin, 3);
        hal_gpio_set_data(_panel->pwr_pin, 0);
        rt_thread_delay(10);
        hal_gpio_set_data(_panel->pwr_pin, _panel->pwr_level);
        rt_thread_delay(10);
        lcd_status = _panel->pwr_level;
    }

    if (_panel->bl_mode == 0)
    {
        hal_gpio_set_direction(_panel->bl_gpio_pin, GPIO_DIRECTION_OUTPUT);
        hal_gpio_set_driving_level(_panel->bl_gpio_pin, 3);
        hal_gpio_set_data(_panel->bl_gpio_pin, _panel->bl_gpio_level);
    }
    else
    {
        lcd_bn = _panel->bl_pwm_val;
        set_lcd_backlight(lcd_bn);
    }
}

void *lcd_get_framebuffer(void *dev)
{