069a0269a9
Factorise pin setup, rewrite PIO code, add support for lcdif irq, handle all the various differences between the stmps, drop yuv blitting code since it already exists in the common lcd drivers. Change-Id: Ifc40aed9b3b12f16611ce960602e46a5bc87ae53
468 lines
12 KiB
C
468 lines
12 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) 2011 by Amaury Pouly
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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> /* off_t */
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#include <string.h>
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#include "cpu.h"
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#include "system.h"
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#include "backlight-target.h"
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#include "lcd.h"
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#include "lcdif-imx233.h"
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#include "clkctrl-imx233.h"
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#include "pinctrl-imx233.h"
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#include "logf.h"
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#ifdef HAVE_LCD_ENABLE
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static bool lcd_on;
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#endif
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static unsigned lcd_yuv_options = 0;
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static void setup_lcdif(void)
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{
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imx233_lcdif_init();
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imx233_lcdif_set_lcd_databus_width(18);
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imx233_lcdif_set_word_length(18);
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imx233_lcdif_set_timings(2, 2, 3, 3);
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imx233_lcdif_enable_underflow_recover(true);
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imx233_lcdif_enable(true);
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imx233_lcdif_setup_system_pins(18);
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imx233_lcdif_enable_bus_master(true);
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}
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static inline uint32_t encode_16_to_18(uint32_t a)
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{
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return ((a & 0xff) << 1) | (((a >> 8) & 0xff) << 10);
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}
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static inline uint32_t decode_18_to_16(uint32_t a)
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{
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return ((a >> 1) & 0xff) | ((a >> 2) & 0xff00);
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}
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static void setup_lcdif_clock(void)
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{
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/* the LCD seems to work at 24Mhz, so use the xtal clock with no divider */
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imx233_clkctrl_enable(CLK_PIX, false);
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imx233_clkctrl_set_div(CLK_PIX, 1);
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imx233_clkctrl_set_bypass(CLK_PIX, true); /* use XTAL */
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imx233_clkctrl_enable(CLK_PIX, true);
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}
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static void lcd_write_reg(uint32_t reg, uint32_t data)
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{
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uint32_t old_reg = reg;
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/* get back to 18-bit word length */
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imx233_lcdif_set_word_length(18);
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reg = encode_16_to_18(reg);
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data = encode_16_to_18(data);
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imx233_lcdif_pio_send(false, 1, ®);
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if(old_reg != 0 && old_reg != 0x202)
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imx233_lcdif_pio_send(true, 1, &data);
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}
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#define REG_MDELAY 0xffffffff
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struct lcd_sequence_entry_t
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{
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uint32_t reg, data;
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};
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static void lcd_send_sequence(struct lcd_sequence_entry_t *seq, unsigned count)
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{
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for(;count-- > 0; seq++)
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{
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if(seq->reg == REG_MDELAY)
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mdelay(seq->data);
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else
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lcd_write_reg(seq->reg, seq->data);
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}
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}
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#define _begin_seq() static struct lcd_sequence_entry_t __seq[] = {
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#define _mdelay(a) {REG_MDELAY, a},
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#define _lcd_write_reg(a, b) {a, b},
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#define _end_seq() }; lcd_send_sequence(__seq, sizeof(__seq) / sizeof(__seq[0]));
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static void lcd_init_seq(void)
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{
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_begin_seq()
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_lcd_write_reg(0, 0)
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_lcd_write_reg(0, 0)
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_lcd_write_reg(0, 0)
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_lcd_write_reg(0, 0)
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_mdelay(100)
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_lcd_write_reg(8, 0x808)
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_lcd_write_reg(0x10, 0x10)
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_lcd_write_reg(0x400, 0x6200)
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_lcd_write_reg(0x300, 0xc0a)
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_lcd_write_reg(0x301, 0x4c11)
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_lcd_write_reg(0x302, 0x906)
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_lcd_write_reg(0x303, 0x1417)
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_lcd_write_reg(0x304, 0x3333)
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_lcd_write_reg(0x305, 0x150d)
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_lcd_write_reg(0x306, 0x740a)
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_lcd_write_reg(0x307, 0x100c)
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_lcd_write_reg(0x308, 0x60c)
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_lcd_write_reg(0x309, 0)
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_lcd_write_reg(0x100, 0x730)
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_lcd_write_reg(0x101, 0x237)
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_lcd_write_reg(0x103, 0x2b00)
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_lcd_write_reg(0x280, 0x4000)
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_lcd_write_reg(0x102, 0x81b0)
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_mdelay(400)
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_lcd_write_reg(1, 0x100)
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_lcd_write_reg(2, 0x100)
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_lcd_write_reg(3, 0x5028)
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_lcd_write_reg(9, 1)
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_lcd_write_reg(0xc, 0)
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_lcd_write_reg(0x11, 0x202)
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_lcd_write_reg(0x12, 0x101)
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_lcd_write_reg(0x13, 1)
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_lcd_write_reg(0x90, 0x8000)
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_lcd_write_reg(0x210, 0)
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_lcd_write_reg(0x211, 0xef)
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_lcd_write_reg(0x212, 0)
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_lcd_write_reg(0x213, 0x18f)
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_lcd_write_reg(0x200, 0)
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_lcd_write_reg(0x201, 0)
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_lcd_write_reg(0x401, 1)
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_lcd_write_reg(0x404, 0)
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_mdelay(400)
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_lcd_write_reg(7, 0x100)
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_mdelay(400)
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_lcd_write_reg(3, 0x1030)
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_end_seq()
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}
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void lcd_init_device(void)
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{
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setup_lcdif();
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setup_lcdif_clock();
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// reset device
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imx233_lcdif_reset_lcd(true);
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mdelay(50);
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imx233_lcdif_reset_lcd(false);
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mdelay(10);
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imx233_lcdif_reset_lcd(true);
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lcd_init_seq();
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#ifdef HAVE_LCD_ENABLE
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lcd_on = true;
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#endif
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}
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#ifdef HAVE_LCD_ENABLE
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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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static void lcd_enable_seq(bool enable)
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{
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if(!enable)
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{
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_begin_seq()
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_end_seq()
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}
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else
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{
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_begin_seq()
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_end_seq()
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}
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}
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void lcd_enable(bool enable)
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{
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if(lcd_on == enable)
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return;
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lcd_on = enable;
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lcd_enable_seq(enable);
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if(enable)
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send_event(LCD_EVENT_ACTIVATION, NULL);
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}
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#endif
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void lcd_update(void)
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{
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lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
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}
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void lcd_update_rect(int x, int y, int w, int h)
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{
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#ifdef HAVE_LCD_ENABLE
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if(!lcd_on)
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return;
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#endif
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/* make sure the rectangle is included in the screen */
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x = MIN(x, LCD_WIDTH);
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y = MIN(y, LCD_HEIGHT);
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w = MIN(w, LCD_WIDTH - x);
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h = MIN(h, LCD_HEIGHT - y);
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imx233_lcdif_wait_ready();
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lcd_write_reg(0x210, x);
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lcd_write_reg(0x211, x + w - 1);
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lcd_write_reg(0x212, y);
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lcd_write_reg(0x213, y + h - 1);
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lcd_write_reg(0x200, 0);
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lcd_write_reg(0x201, 0);
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lcd_write_reg(0x202, 0);
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imx233_lcdif_wait_ready();
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imx233_lcdif_set_word_length(16);
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imx233_lcdif_set_byte_packing_format(0xf); /* two pixels per 32-bit word */
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/* there are two cases here:
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* - either width = LCD_WIDTH and we can directly memcopy a part of lcd_framebuffer to FRAME
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* and send it
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* - either width != LCD_WIDTH and we have to build a contiguous copy of the rectangular area
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* into FRAME before sending it (which is slower and doesn't use the hardware)
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* In all cases, FRAME just acts as a temporary buffer.
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* NOTE It's more interesting to do a copy to FRAME in all cases since in system mode
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* the clock runs at 24MHz which provides barely 10MB/s bandwidth compared to >100MB/s
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* for memcopy operations
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*/
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if(w == LCD_WIDTH)
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{
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memcpy((void *)FRAME, FBADDR(x,y), w * h * sizeof(fb_data));
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}
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else
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{
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for(int i = 0; i < h; i++)
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memcpy((fb_data *)FRAME + i * w, FBADDR(x,y + i), w * sizeof(fb_data));
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}
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/* WARNING The LCDIF has a limitation on the vertical count ! In 16-bit packed mode
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* (which we used, ie 16-bit per pixel, 2 pixels per 32-bit words), the v_count
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* field must be a multiple of 2. Furthermore, it seems the lcd controller doesn't
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* really like when both w and h are even, probably because the writes to the GRAM
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* are done on several words and the controller requires dummy writes.
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* The workaround is to always make sure that we send a number of pixels which is
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* a multiple of 4 so that both the lcdif and the controller are happy. If any
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* of w or h is odd, we will send a copy of the first pixels as dummy writes. We will
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* send at most 3 bytes. We then send (w * h + 3) / 4 x 4 bytes.
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*/
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if(w % 2 == 1 || h % 2 == 1)
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{
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/* copy three pixel after the last one */
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for(int i = 0; i < 3; i++)
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*((fb_data *)FRAME + w * h + i) = *((fb_data *)FRAME + i);
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/* WARNING we need to update w and h to reflect the pixel count BUT it
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* has no relation to w * h (it can even be 2 * prime). Hopefully, w <= 240 and
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* h <= 320 so w * h <= 76800 and (w * h + 3) / 4 <= 38400 which fits into
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* a 16-bit integer (horizontal count). */
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h = (w * h + 3) / 4;
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w = 4;
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}
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imx233_lcdif_dma_send((void *)FRAME_PHYS_ADDR, w, h);
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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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#define YFAC (74)
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#define RVFAC (101)
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#define GUFAC (-24)
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#define GVFAC (-51)
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#define BUFAC (128)
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static inline int clamp(int val, int min, int max)
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{
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if (val < min)
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val = min;
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else if (val > max)
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val = max;
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return val;
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}
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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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const unsigned char *ysrc, *usrc, *vsrc;
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int linecounter;
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fb_data *dst, *row_end;
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long z;
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/* width and height must be >= 2 and an even number */
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width &= ~1;
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linecounter = height >> 1;
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#if LCD_WIDTH >= LCD_HEIGHT
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dst = FBADDR(x,y);
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row_end = dst + width;
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#else
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dst = FBADDR(LCD_WIDTH - y - 1,x);
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row_end = dst + LCD_WIDTH * width;
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#endif
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z = stride * src_y;
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ysrc = src[0] + z + src_x;
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usrc = src[1] + (z >> 2) + (src_x >> 1);
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vsrc = src[2] + (usrc - src[1]);
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/* stride => amount to jump from end of last row to start of next */
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stride -= width;
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/* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */
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do
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{
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do
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{
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int y, cb, cr, rv, guv, bu, r, g, b;
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y = YFAC*(*ysrc++ - 16);
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cb = *usrc++ - 128;
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cr = *vsrc++ - 128;
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rv = RVFAC*cr;
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guv = GUFAC*cb + GVFAC*cr;
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bu = BUFAC*cb;
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r = y + rv;
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g = y + guv;
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b = y + bu;
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if ((unsigned)(r | g | b) > 64*256-1)
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{
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r = clamp(r, 0, 64*256-1);
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g = clamp(g, 0, 64*256-1);
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b = clamp(b, 0, 64*256-1);
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}
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*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
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#if LCD_WIDTH >= LCD_HEIGHT
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dst++;
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#else
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dst += LCD_WIDTH;
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#endif
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y = YFAC*(*ysrc++ - 16);
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r = y + rv;
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g = y + guv;
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b = y + bu;
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if ((unsigned)(r | g | b) > 64*256-1)
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{
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r = clamp(r, 0, 64*256-1);
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g = clamp(g, 0, 64*256-1);
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b = clamp(b, 0, 64*256-1);
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}
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*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
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#if LCD_WIDTH >= LCD_HEIGHT
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dst++;
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#else
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dst += LCD_WIDTH;
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#endif
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}
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while (dst < row_end);
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ysrc += stride;
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usrc -= width >> 1;
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vsrc -= width >> 1;
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#if LCD_WIDTH >= LCD_HEIGHT
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row_end += LCD_WIDTH;
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dst += LCD_WIDTH - width;
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#else
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row_end -= 1;
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dst -= LCD_WIDTH*width + 1;
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#endif
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do
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{
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int y, cb, cr, rv, guv, bu, r, g, b;
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y = YFAC*(*ysrc++ - 16);
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cb = *usrc++ - 128;
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cr = *vsrc++ - 128;
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rv = RVFAC*cr;
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guv = GUFAC*cb + GVFAC*cr;
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bu = BUFAC*cb;
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r = y + rv;
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g = y + guv;
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b = y + bu;
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if ((unsigned)(r | g | b) > 64*256-1)
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{
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r = clamp(r, 0, 64*256-1);
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g = clamp(g, 0, 64*256-1);
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b = clamp(b, 0, 64*256-1);
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}
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*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
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#if LCD_WIDTH >= LCD_HEIGHT
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dst++;
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#else
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dst += LCD_WIDTH;
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#endif
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y = YFAC*(*ysrc++ - 16);
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r = y + rv;
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g = y + guv;
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b = y + bu;
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if ((unsigned)(r | g | b) > 64*256-1)
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{
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r = clamp(r, 0, 64*256-1);
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g = clamp(g, 0, 64*256-1);
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b = clamp(b, 0, 64*256-1);
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}
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*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
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#if LCD_WIDTH >= LCD_HEIGHT
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dst++;
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#else
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dst += LCD_WIDTH;
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#endif
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}
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while (dst < row_end);
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ysrc += stride;
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usrc += stride >> 1;
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vsrc += stride >> 1;
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#if LCD_WIDTH >= LCD_HEIGHT
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row_end += LCD_WIDTH;
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dst += LCD_WIDTH - width;
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#else
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row_end -= 1;
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dst -= LCD_WIDTH*width + 1;
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#endif
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}
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while (--linecounter > 0);
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#if LCD_WIDTH >= LCD_HEIGHT
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lcd_update_rect(x, y, width, height);
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#else
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lcd_update_rect(LCD_WIDTH - y - height, x, height, width);
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#endif
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}
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