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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Will Robertson
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <sys/types.h>
#include "config.h"
#include "cpu.h"
#include "string.h"
#include "lcd.h"
#include "kernel.h"
#include "lcd-target.h"
#include "backlight-target.h"
#define MAIN_LCD_IDMAC_CHANNEL 14
#define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)])
static bool lcd_on = true;
static bool lcd_powered = true;
static unsigned lcd_yuv_options = 0;
/* Copies a rectangle from one framebuffer to another. Can be used in
single transfer mode with width = num pixels, and height = 1 which
allows a full-width rectangle to be copied more efficiently. */
extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
int width, int height);
/* LCD init */
void lcd_init_device(void)
{
/* Move the framebuffer */
#ifdef BOOTLOADER
/* Only do this once to avoid flicker */
memset(FRAME, 0x00, FRAME_SIZE);
#endif
IPU_IDMAC_CHA_EN &= ~(1ul << MAIN_LCD_IDMAC_CHANNEL);
IPU_IMA_ADDR = ((0x1 << 16) | (MAIN_LCD_IDMAC_CHANNEL << 4)) + (1 << 3);
IPU_IMA_DATA = FRAME_PHYS_ADDR;
IPU_IDMAC_CHA_EN |= (1ul << MAIN_LCD_IDMAC_CHANNEL);
}
/* Update a fraction of the display. */
void lcd_update_rect(int x, int y, int width, int height)
{
fb_data *dst, *src;
if (!lcd_on)
return;
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x; /* Clip right */
if (x < 0)
width += x, x = 0; /* Clip left */
if (width <= 0)
return; /* nothing left to do */
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y; /* Clip bottom */
if (y < 0)
height += y, y = 0; /* Clip top */
if (height <= 0)
return; /* nothing left to do */
/* TODO: It may be faster to swap the addresses of lcd_driver_framebuffer
* and lcd_framebuffer */
dst = (fb_data *)FRAME + LCD_WIDTH*y + x;
src = &lcd_framebuffer[y][x];
/* Copy part of the Rockbox framebuffer to the second framebuffer */
if (width < LCD_WIDTH)
{
/* Not full width - do line-by-line */
lcd_copy_buffer_rect(dst, src, width, height);
}
else
{
/* Full width - copy as one line */
lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1);
}
}
void lcd_sleep(void)
{
if (lcd_powered)
{
lcd_enable(false);
lcd_powered = false;
IPU_IDMAC_CHA_EN &= ~(1ul << MAIN_LCD_IDMAC_CHANNEL);
_backlight_lcd_sleep();
}
}
void lcd_enable(bool state)
{
if (state == lcd_on)
return;
if (state)
{
IPU_IDMAC_CHA_EN |= 1ul << MAIN_LCD_IDMAC_CHANNEL;
sleep(HZ/50);
lcd_powered = true;
lcd_on = true;
lcd_update();
send_event(LCD_EVENT_ACTIVATION, NULL);
}
else
{
lcd_on = false;
}
}
bool lcd_active(void)
{
return lcd_on;
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
if (!lcd_on)
return;
lcd_copy_buffer_rect((fb_data *)FRAME, &lcd_framebuffer[0][0],
LCD_WIDTH*LCD_HEIGHT, 1);
}
void lcd_yuv_set_options(unsigned options)
{
lcd_yuv_options = options;
}
/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
extern void lcd_write_yuv420_lines(fb_data *dst,
unsigned char const * const src[3],
int width,
int stride);
extern void lcd_write_yuv420_lines_odither(fb_data *dst,
unsigned char const * const src[3],
int width,
int stride,
int x_screen, /* To align dither pattern */
int y_screen);
/* Performance function to blit a YUV bitmap directly to the LCD */
/* For the Gigabeat - show it rotated */
/* So the LCD_WIDTH is now the height */
void lcd_blit_yuv(unsigned char * const src[3],
int src_x, int src_y, int stride,
int x, int y, int width, int height)
{
/* Caches for chroma data so it only need be recaculated every other
line */
unsigned char const * yuv_src[3];
off_t z;
if (!lcd_on)
return;
/* Sorry, but width and height must be >= 2 or else */
width &= ~1;
height >>= 1;
y = LCD_WIDTH - 1 - y;
fb_data *dst = (fb_data*)FRAME + x * LCD_WIDTH + y;
z = stride*src_y;
yuv_src[0] = src[0] + z + src_x;
yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
if (lcd_yuv_options & LCD_YUV_DITHER)
{
do
{
lcd_write_yuv420_lines_odither(dst, yuv_src, width, stride, y, x);
yuv_src[0] += stride << 1; /* Skip down two luma lines */
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
yuv_src[2] += stride >> 1;
dst -= 2;
y -= 2;
}
while (--height > 0);
}
else
{
do
{
lcd_write_yuv420_lines(dst, yuv_src, width, stride);
yuv_src[0] += stride << 1; /* Skip down two luma lines */
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
yuv_src[2] += stride >> 1;
dst -= 2;
}
while (--height > 0);
}
}
void lcd_set_contrast(int val) {
(void) val;
// TODO:
}
void lcd_set_invert_display(bool yesno) {
(void) yesno;
// TODO:
}
void lcd_set_flip(bool yesno) {
(void) yesno;
// TODO:
}
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