e286b0bbc0
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27188 a1c6a512-1295-4272-9138-f99709370657
363 lines
9.6 KiB
C
363 lines
9.6 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Will Robertson
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <sys/types.h>
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#include "inttypes.h"
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#include "config.h"
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#include "system.h"
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#include "cpu.h"
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#include "spi-imx31.h"
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#include "mc13783.h"
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#include "string.h"
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#include "lcd.h"
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#include "kernel.h"
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#include "lcd-target.h"
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#include "backlight-target.h"
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#define MAIN_LCD_IDMAC_CHANNEL 14
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#define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)])
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/* Copies a rectangle from one framebuffer to another. Can be used in
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single transfer mode with width = num pixels, and height = 1 which
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allows a full-width rectangle to be copied more efficiently. */
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extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
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int width, int height);
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static bool lcd_on = true;
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static bool lcd_powered = true;
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static unsigned lcd_yuv_options = 0;
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#if 0
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/* Initialization data from OF bootloader. Identical to Gigabeat F/X. */
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static const unsigned char lcd_init_data[50] =
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{
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/* Reg Val */
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0x0f, 0x01,
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0x09, 0x06,
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0x16, 0xa6,
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0x1e, 0x49,
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0x1f, 0x26,
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0x0b, 0x2f, /* Set contrast 0-63 */
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0x0c, 0x2b,
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0x19, 0x5e,
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0x1a, 0x15,
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0x1b, 0x15,
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0x1d, 0x01,
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0x00, 0x03,
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0x01, 0x10,
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0x02, 0x0a,
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0x06, 0x04, /* Set the orientation 2=upside down, 4=normal */
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0x08, 0x2e,
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0x24, 0x12,
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0x25, 0x3f,
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0x26, 0x0b,
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0x27, 0x00,
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0x28, 0x00,
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0x29, 0xf6,
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0x2a, 0x03,
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0x2b, 0x0a,
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0x04, 0x01, /* Display ON */
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};
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#endif
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static const struct spi_node lcd_spi_node =
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{
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/* Original firmware settings for LCD panel commication */
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CSPI3_NUM, /* CSPI module 3 */
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CSPI_CONREG_CHIP_SELECT_SS1 | /* Chip select 1 */
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CSPI_CONREG_DRCTL_DONT_CARE | /* Don't care about CSPI_RDY */
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CSPI_CONREG_DATA_RATE_DIV_16 | /* Clock = IPG_CLK/16 = 4,125,000Hz. */
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CSPI_BITCOUNT(32-1) | /* All 32 bits are to be transferred */
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CSPI_CONREG_SSPOL | /* SS active high */
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CSPI_CONREG_PHA | /* Phase 1 operation */
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CSPI_CONREG_POL | /* Active low polarity */
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CSPI_CONREG_MODE, /* Master mode */
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0, /* SPI clock - no wait states */
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};
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static void lcd_write_reg(unsigned reg, unsigned val)
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{
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/* packet: |00|rr|01|vv| */
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uint32_t packet = ((reg & 0xff) << 16) | 0x0100 | (val & 0xff);
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struct spi_transfer_desc xfer;
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xfer.node = &lcd_spi_node;
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xfer.txbuf = &packet;
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xfer.rxbuf = NULL;
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xfer.count = 1;
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xfer.callback = NULL;
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xfer.next = NULL;
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if (spi_transfer(&xfer))
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{
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/* Just busy wait; the interface is not used very much */
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while (!spi_transfer_complete(&xfer));
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}
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}
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static void lcd_enable_interface(bool enable)
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{
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if (enable)
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{
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spi_enable_module(&lcd_spi_node);
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}
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else
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{
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spi_disable_module(&lcd_spi_node);
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}
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}
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static void lcd_set_power(bool powered)
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{
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if (powered)
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{
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lcd_powered = false;
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lcd_write_reg(0x04, 0x00);
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lcd_enable_interface(false);
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bitclr32(&GPIO3_DR, (1 << 12));
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mc13783_clear(MC13783_REGULATOR_MODE1, MC13783_VCAMEN);
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}
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else
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{
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mc13783_set(MC13783_REGULATOR_MODE1, MC13783_VCAMEN);
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bitset32(&GPIO3_DR, (1 << 12));
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lcd_enable_interface(true);
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lcd_write_reg(0x04, 0x01);
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lcd_powered = true;
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}
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}
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/* LCD init */
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void INIT_ATTR lcd_init_device(void)
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{
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/* Move the framebuffer */
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#ifdef BOOTLOADER
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/* Only do this once to avoid flicker */
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memset(FRAME, 0x00, FRAME_SIZE);
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#endif
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IPU_IPU_IMA_ADDR = ((0x1 << 16) | (MAIN_LCD_IDMAC_CHANNEL << 4)) + (1 << 3);
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IPU_IPU_IMA_DATA = FRAME_PHYS_ADDR;
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lcd_enable_interface(true);
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#ifdef HAVE_LCD_CONTRAST
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lcd_set_contrast(DEFAULT_CONTRAST_SETTING);
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#endif
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#ifdef HAVE_LCD_INVERT
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lcd_set_invert_display(false);
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#endif
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#ifdef HAVE_LCD_FLIP
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lcd_set_flip(false);
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#endif
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}
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/* Update a fraction of the display. */
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void lcd_update_rect(int x, int y, int width, int height)
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{
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fb_data *dst, *src;
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if (!lcd_on)
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return;
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if (x + width > LCD_WIDTH)
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width = LCD_WIDTH - x; /* Clip right */
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if (x < 0)
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width += x, x = 0; /* Clip left */
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if (width <= 0)
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return; /* nothing left to do */
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if (y + height > LCD_HEIGHT)
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height = LCD_HEIGHT - y; /* Clip bottom */
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if (y < 0)
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height += y, y = 0; /* Clip top */
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if (height <= 0)
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return; /* nothing left to do */
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/* TODO: It may be faster to swap the addresses of lcd_driver_framebuffer
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* and lcd_framebuffer */
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dst = (fb_data *)FRAME + LCD_WIDTH*y + x;
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src = &lcd_framebuffer[y][x];
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/* Copy part of the Rockbox framebuffer to the second framebuffer */
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if (width < LCD_WIDTH)
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{
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/* Not full width - do line-by-line */
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lcd_copy_buffer_rect(dst, src, width, height);
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}
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else
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{
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/* Full width - copy as one line */
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lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1);
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}
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}
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void lcd_sleep(void)
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{
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if (!lcd_powered)
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return;
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IPU_IDMAC_CHA_EN &= ~(1ul << MAIN_LCD_IDMAC_CHANNEL);
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lcd_enable(false);
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lcd_set_power(false);
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_backlight_lcd_sleep();
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}
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void lcd_enable(bool state)
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{
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if (state == lcd_on)
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return;
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if (state)
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{
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if (!lcd_powered)
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lcd_set_power(true);
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IPU_IDMAC_CHA_EN |= 1ul << MAIN_LCD_IDMAC_CHANNEL;
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sleep(HZ/50);
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lcd_on = true;
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lcd_update();
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send_event(LCD_EVENT_ACTIVATION, NULL);
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}
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else
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{
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lcd_on = false;
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}
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}
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bool lcd_active(void)
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{
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return lcd_on;
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}
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/* Update the display.
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This must be called after all other LCD functions that change the display. */
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void lcd_update(void)
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{
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if (!lcd_on)
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return;
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lcd_copy_buffer_rect((fb_data *)FRAME, &lcd_framebuffer[0][0],
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LCD_WIDTH*LCD_HEIGHT, 1);
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}
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void lcd_yuv_set_options(unsigned options)
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{
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lcd_yuv_options = options;
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}
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/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
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extern void lcd_write_yuv420_lines(fb_data *dst,
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unsigned char const * const src[3],
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int width,
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int stride);
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extern void lcd_write_yuv420_lines_odither(fb_data *dst,
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unsigned char const * const src[3],
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int width,
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int stride,
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int x_screen, /* To align dither pattern */
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int y_screen);
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/* Performance function to blit a YUV bitmap directly to the LCD */
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/* For the Gigabeat - show it rotated */
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/* So the LCD_WIDTH is now the height */
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void lcd_blit_yuv(unsigned char * const src[3],
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int src_x, int src_y, int stride,
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int x, int y, int width, int height)
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{
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/* Caches for chroma data so it only need be recaculated every other
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line */
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unsigned char const * yuv_src[3];
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off_t z;
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if (!lcd_on)
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return;
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/* Sorry, but width and height must be >= 2 or else */
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width &= ~1;
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height >>= 1;
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y = LCD_WIDTH - 1 - y;
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fb_data *dst = (fb_data*)FRAME + x * LCD_WIDTH + y;
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z = stride*src_y;
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yuv_src[0] = src[0] + z + src_x;
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yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
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yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
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if (lcd_yuv_options & LCD_YUV_DITHER)
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{
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do
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{
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lcd_write_yuv420_lines_odither(dst, yuv_src, width, stride, y, x);
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yuv_src[0] += stride << 1; /* Skip down two luma lines */
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yuv_src[1] += stride >> 1; /* Skip down one chroma line */
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yuv_src[2] += stride >> 1;
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dst -= 2;
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y -= 2;
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}
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while (--height > 0);
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}
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else
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{
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do
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{
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lcd_write_yuv420_lines(dst, yuv_src, width, stride);
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yuv_src[0] += stride << 1; /* Skip down two luma lines */
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yuv_src[1] += stride >> 1; /* Skip down one chroma line */
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yuv_src[2] += stride >> 1;
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dst -= 2;
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}
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while (--height > 0);
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}
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}
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#ifdef HAVE_LCD_CONTRAST
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void lcd_set_contrast(int val)
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{
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if (!lcd_on)
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return;
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lcd_write_reg(0x0b, val);
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}
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int lcd_default_contrast(void)
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{
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return DEFAULT_CONTRAST_SETTING;
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}
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#endif /* HAVE_LCD_CONTRAST */
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#ifdef HAVE_LCD_INVERT
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void lcd_set_invert_display(bool yesno)
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{
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if (!lcd_on)
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return;
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lcd_write_reg(0x27, yesno ? 0x10 : 00);
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}
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#endif /* HAVE_LCD_INVERT */
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#ifdef HAVE_LCD_FLIP
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void lcd_set_flip(bool yesno)
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{
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if (!lcd_on)
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return;
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lcd_write_reg(0x06, yesno ? 0x02 : 0x04);
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}
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#endif /* HAVE_LCD_FLIP */
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