/************************************************************************************
 * arch/arm/src/stm32/stm32_ltdc.h
 *
 *   Copyright (C) 2013-2014 Ken Pettit. All rights reserved.
 *   Authors: Ken Pettit <pettitd@gmail.com>
 *            Marco Krahl <ocram.lhark@gmail.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ************************************************************************************/

#ifndef __ARCH_ARM_SRC_STM32_STM32_LTDC_H
#define __ARCH_ARM_SRC_STM32_STM32_LTDC_H

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

#include <nuttx/config.h>
#include <stdbool.h>
#include <semaphore.h>
#include <nuttx/video/fb.h>
#include <nuttx/video/ltdc.h>
#include <nuttx/nx/nxglib.h>

#ifdef CONFIG_STM32_LTDC
/************************************************************************************
 * Pre-processor Definitions
 ************************************************************************************/

/************************************************************************************
 * Public Types
 ************************************************************************************/

/* Common layer state structure for the LTDC and DMA2D controller */

struct stm32_ltdc_s
{
  /* Fixed settings */

  int lid;                      /* Layer identifier */
  struct fb_videoinfo_s vinfo;  /* Layer videoinfo */
  struct fb_planeinfo_s pinfo;  /* Layer planeinfo */

  /* Positioning */

  struct ltdc_area_s area;      /* Active layer area */
  fb_coord_t xpos;              /* Reference x position */
  fb_coord_t ypos;              /* Reference y position */

  /* Coloring */

  uint32_t color;               /* Layer color definition */
#ifdef CONFIG_FB_CMAP
  struct fb_cmap_s *cmap;       /* Reference to the valid color lookup table */
#endif

  /* Blending */

  uint8_t  alpha;               /* Layer constant alpha value */
  uint32_t colorkey;            /* Layer colorkey */
  uint32_t blendmode;           /* Layer blend factor */

  /* Operation */

  sem_t     *lock;              /* Ensure mutually exclusive access */
};

/************************************************************************************
 * Public Data
 ************************************************************************************/

/************************************************************************************
 * Public Functions
 ************************************************************************************/
/*
 * The STM32 LTDC driver uses the common framebuffer interfaces declared in
 * include/nuttx/video/fb.h.
 */

int stm32_ltdcinitialize(void);
FAR struct fb_vtable_s *stm32_ltdcgetvplane(int vplane);
void stm32_ltdcuninitialize(void);

/************************************************************************************
 * Name: stm32_ltdcgetlayer
 *
 * Description:
 *   Get the ltdc layer structure to perform hardware layer operation
 *
 * Parameter:
 *   lid - Layer identifier
 *
 * Return:
 *   Reference to the layer control structure on success or Null if parameter
 *   invalid.
 *
 ************************************************************************************/

FAR struct ltdc_layer_s *stm32_ltdcgetlayer(int lid);

/************************************************************************************
 * Name: stm32_lcdclear
 *
 * Description:
 *   This is a non-standard LCD interface just for the STM32 LTDC. Clearing the
 *   display in the normal way by writing a sequences of runs that covers the
 *   entire display can be slow.  Here the display is cleared by simply setting
 *   all video memory to the specified color.
 *
 ************************************************************************************/

void stm32_lcdclear(nxgl_mxpixel_t color);

/************************************************************************************
 * Name: stm32_lcd_backlight
 *
 * Description:
 *   If CONFIG_STM32_LCD_BACKLIGHT is defined, then the board-specific logic must
 *   provide this interface to turn the backlight on and off.
 *
 ************************************************************************************/

#ifdef CONFIG_STM32_LCD_BACKLIGHT
void stm32_backlight(bool blon);
#endif

#endif /* CONFIG_STM32_LTDC */
#endif /* __ARCH_ARM_SRC_STM32_STM32_LTDC_H */