boards/arm/stm32f7/stm32f746g-disco/src/stm32_lcd.c

/****************************************************************************
 * boards/arm/stm32f7/stm32f746g-disco/src/stm32_lcd.c
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <errno.h>
#include <debug.h>

#include <nuttx/arch.h>
#include <nuttx/board.h>
#include <nuttx/video/fb.h>

#include <arch/board/board.h>

#include "arm_internal.h"
#include "stm32f746g-disco.h"
#include "stm32_gpio.h"
#include "stm32_ltdc.h"

#ifdef CONFIG_STM32F7_LTDC
/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: up_fbinitialize
 *
 * Description:
 *   Initialize the framebuffer video hardware associated with the display.
 *
 * Input Parameters:
 *   display - In the case of hardware with multiple displays, this
 *     specifies the display.  Normally this is zero.
 *
 * Returned Value:
 *   Zero is returned on success; a negated errno value is returned on any
 *   failure.
 *
 ****************************************************************************/

int up_fbinitialize(int display)
{
  /* Custom LCD display with RGB interface */

  stm32_configgpio(GPIO_LCD_DISP);
  stm32_configgpio(GPIO_LCD_BL);

  stm32_gpiowrite(GPIO_LCD_DISP, true);
  stm32_gpiowrite(GPIO_LCD_BL, true);

  return stm32_ltdcinitialize();
}

/****************************************************************************
 * Name: up_fbgetvplane
 *
 * Description:
 *   Return a a reference to the framebuffer object for the specified video
 *   plane of the specified plane.
 *   Many OSDs support multiple planes of video.
 *
 * Input Parameters:
 *   display - In the case of hardware with multiple displays, this
 *     specifies the display.  Normally this is zero.
 *   vplane - Identifies the plane being queried.
 *
 * Returned Value:
 *   A non-NULL pointer to the frame buffer access structure is returned on
 *   success; NULL is returned on any failure.
 *
 ****************************************************************************/

struct fb_vtable_s *up_fbgetvplane(int display, int vplane)
{
  return stm32_ltdcgetvplane(vplane);
}

/****************************************************************************
 * Name: up_fbuninitialize
 *
 * Description:
 *   Uninitialize the framebuffer support for the specified display.
 *
 * Input Parameters:
 *   display - In the case of hardware with multiple displays, this
 *     specifies the display.  Normally this is zero.
 *
 * Returned Value:
 *   None
 *
 ****************************************************************************/

void up_fbuninitialize(int display)
{
  stm32_gpiowrite(GPIO_LCD_DISP, false);
  stm32_gpiowrite(GPIO_LCD_BL, false);

  stm32_ltdcuninitialize();
}
#endif /* CONFIG_STM32_LTDC */