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rockbox/firmware/target/arm/samsung/yh925/lcd-yh925.c
Jonathan Gordon b37e6bc8c1 lcd drivers: Convert lcd_[remote_]framebuffer to a pointer 
Change all lcd drivers to using a pointer to the static framebuffer
instead of directly accessing the static array. This will let us
later do fun things like dynamic framebuffer sizes (RaaA) or
ability to use different buffers for different layers (dynamic
skin backdrops!)

Change-Id: I0a4d58a9d7b55e6c932131b929e5d4c9f9414b06
2012-02-28 11:44:59 +11:00

663 lines
20 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Barry Wardell
*
* 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 "config.h"
#include "cpu.h"
#include "lcd.h"
#include "kernel.h"
#include "system.h"
/** Initialized in lcd_init_device() **/
/* Is the power turned on? */
static bool power_on;
/* Is the display turned on? */
static bool display_on;
/* Amount of vertical offset. Used for flip offset correction/detection. */
static int y_offset = 4;
static int x_offset = 16;
/* Reverse flag. Must be remembered when display is turned off. */
static unsigned short disp_control_rev;
/* Contrast setting << 8 */
static int lcd_contrast;
static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
/* Forward declarations */
#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
static void lcd_display_off(void);
#endif
/* register defines for the Renesas HD66773R */
#define R_START_OSC 0x00
#define R_DEVICE_CODE_READ 0x00
#define R_DRV_OUTPUT_CONTROL 0x01
#define R_DRV_AC_CONTROL 0x02
#define R_POWER_CONTROL1 0x03
#define R_POWER_CONTROL2 0x04
#define R_ENTRY_MODE 0x05
#define R_COMPARE_REG 0x06
#define R_DISP_CONTROL 0x07
#define R_FRAME_CYCLE_CONTROL 0x0b
#define R_POWER_CONTROL3 0x0c
#define R_POWER_CONTROL4 0x0d
#define R_POWER_CONTROL5 0x0e
#define R_GATE_SCAN_START_POS 0x0f
#define R_VERT_SCROLL_CONTROL 0x11
#define R_1ST_SCR_DRV_POS 0x14
#define R_2ND_SCR_DRV_POS 0x15
#define R_HORIZ_RAM_ADDR_POS 0x16
#define R_VERT_RAM_ADDR_POS 0x17
#define R_RAM_WRITE_DATA_MASK 0x20
#define R_RAM_ADDR_SET 0x21
#define R_WRITE_DATA_2_GRAM 0x22
#define R_RAM_READ_DATA 0x22
#define R_GAMMA_FINE_ADJ_POS1 0x30
#define R_GAMMA_FINE_ADJ_POS2 0x31
#define R_GAMMA_FINE_ADJ_POS3 0x32
#define R_GAMMA_GRAD_ADJ_POS 0x33
#define R_GAMMA_FINE_ADJ_NEG1 0x34
#define R_GAMMA_FINE_ADJ_NEG2 0x35
#define R_GAMMA_FINE_ADJ_NEG3 0x36
#define R_GAMMA_GRAD_ADJ_NEG 0x37
#define R_GAMMA_AMP_ADJ_POS 0x3a
#define R_GAMMA_AMP_ADJ_NEG 0x3b
#define R_DRV_OUTPUT_CONTROL_NORMAL (1<<9|1<<4|1<<2|1<<0)
#define R_DRV_OUTPUT_CONTROL_FLIPPED (1<<11|1<<8|1<<5|1<<4|1<<3)
static inline void lcd_wait_write(void)
{
while (LCD2_PORT & LCD2_BUSY_MASK);
}
/* Send command */
static inline void lcd_send_cmd(unsigned cmd)
{
lcd_wait_write();
LCD2_PORT = LCD2_CMD_MASK; /* Send MSB first (should always be 0) */
lcd_wait_write();
LCD2_PORT = LCD2_CMD_MASK | cmd;
}
/* Send 16-bit data */
static inline void lcd_send_data(unsigned data)
{
lcd_wait_write();
LCD2_PORT = (data >> 8) | LCD2_DATA_MASK; /* Send MSB first */
lcd_wait_write();
LCD2_PORT = (data & 0xff) | LCD2_DATA_MASK;
}
/* Send 16-bit data byte-swapped. Only needed until we can use block transfer. */
static inline void lcd_send_data_swapped(unsigned v)
{
lcd_wait_write();
LCD2_PORT = LCD2_DATA_MASK | (v & 0xff); /* Send LSB first */
LCD2_PORT = LCD2_DATA_MASK | (v >> 8);
}
/* Write value to register */
static void lcd_write_reg(int reg, int val)
{
lcd_send_cmd(reg);
lcd_send_data(val);
}
/*** hardware configuration ***/
int lcd_default_contrast(void)
{
return DEFAULT_CONTRAST_SETTING;
}
void lcd_set_contrast(int val)
{
/* Clamp val in range 0-14, 16-30 */
if (val < 1)
val = 0;
else if (val <= 15)
--val;
else if (val > 30)
val = 30;
lcd_contrast = val << 8;
if (!power_on)
return;
/* VCOMG=1, VDV4-0=xxxxx, VCM4-0=11000 */
lcd_write_reg(R_POWER_CONTROL5, 0x2018 | lcd_contrast);
}
void lcd_set_invert_display(bool yesno)
{
if (yesno == (disp_control_rev == 0x0000))
return;
disp_control_rev = yesno ? 0x0000 : 0x0004;
if (!display_on)
return;
/* PT1-0=00, VLE2-1=00, SPT=0, GON=1, DTE=1, REV=x, D1-0=11 */
lcd_write_reg(R_DISP_CONTROL, 0x0033 | disp_control_rev);
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool flip)
{
int r_drv_output_control;
if (flip == (y_offset != 4))
return;
/* The LCD controller is 132x160 while the LCD itself is 128x160, so we need
* to shift the origin by 4 when we flip the LCD
*
* the higher bits are the key bits for flipping */
if (flip)
{
x_offset = 0; y_offset = 0;
r_drv_output_control = R_DRV_OUTPUT_CONTROL_FLIPPED;
}
else
{
x_offset = 16; y_offset = 4;
r_drv_output_control = R_DRV_OUTPUT_CONTROL_NORMAL;
}
if (!power_on)
return;
lcd_write_reg(R_1ST_SCR_DRV_POS, ( (LCD_WIDTH + x_offset - 1) << 8) | x_offset);
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (LCD_HEIGHT - 1) << 8 | 0);
lcd_write_reg(R_VERT_RAM_ADDR_POS, ((LCD_WIDTH + x_offset- 1) << 8) | x_offset);
lcd_write_reg(R_DRV_OUTPUT_CONTROL, r_drv_output_control );
lcd_write_reg(R_ENTRY_MODE, 0x1028);
}
/* Reset the LCD prior to booting the OF */
#ifdef BOOTLOADER
void lcd_reset(void)
{
lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x0315);
lcd_write_reg(R_ENTRY_MODE, 0x1028);
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, 0x7f00);
lcd_write_reg(R_VERT_RAM_ADDR_POS, 0xaf10);
lcd_write_reg(R_RAM_ADDR_SET, 0x0000);
}
#endif
/* LCD init */
void lcd_init_device(void)
{
#if 0
/* This is the OF LCD init */
int i;
DEV_EN2 |= 0x2000;
DEV_INIT1 |= 0xfc000000;
CLCD_CLOCK_SRC &= ~0xf;
DEV_INIT2 &= ~0x400;
GPIOF_ENABLE |= 0x4;
GPIOF_OUTPUT_EN |= 0x4;
GPIOF_OUTPUT_VAL &= ~0x4;
udelay(300000);
GPIOF_OUTPUT_VAL |= 0x4;
outl(0x220, 0x70008a00);
outl(0x1f00, 0x70008a04);
LCD2_BLOCK_CTRL = 0x10008080;
LCD2_BLOCK_CONFIG = 0xf00000;
udelay(100000);
for (i = 0; i < 8; i++)
{
lcd_send_data(0);
udelay(1);
}
lcd_write_reg(R_START_OSC, 0x0001);
udelay(20000);
lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x0315);
lcd_write_reg(R_DRV_AC_CONTROL, 0x0700);
lcd_write_reg(R_ENTRY_MODE, 0x1028);
lcd_write_reg(R_COMPARE_REG, 0x0000);
lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x4008);
lcd_write_reg(R_RAM_ADDR_SET, 0x0000);
lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0700);
lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0000);
lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0000);
lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0100);
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0707);
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0007);
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0700);
lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0001);
lcd_write_reg(R_GATE_SCAN_START_POS, 0x0000);
lcd_write_reg(R_VERT_SCROLL_CONTROL, 0x0000);
lcd_write_reg(R_1ST_SCR_DRV_POS, ( (LCD_WIDTH + 16 - 1) << 8) | 16);
lcd_write_reg(R_2ND_SCR_DRV_POS, 0x0000);
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (LCD_HEIGHT - 1) << 8 | 0);
lcd_write_reg(R_VERT_RAM_ADDR_POS, ((LCD_WIDTH + 16- 1) << 8) | 16);
lcd_write_reg(R_GAMMA_AMP_ADJ_POS, 0x1600);
lcd_write_reg(R_GAMMA_AMP_ADJ_NEG, 0x0006);
lcd_write_reg(R_DISP_CONTROL, 0x0104);
lcd_write_reg(R_POWER_CONTROL4, 0x0100);
lcd_write_reg(R_POWER_CONTROL5, 0x0d18);
lcd_write_reg(R_POWER_CONTROL3, 0x0000);
udelay(50000);
lcd_write_reg(R_POWER_CONTROL1, 0x0008);
lcd_write_reg(R_POWER_CONTROL3, 0x0000);
lcd_write_reg(R_POWER_CONTROL2, 0x0000);
udelay(50000);
lcd_write_reg(R_POWER_CONTROL5, 0x2d18);
lcd_write_reg(R_POWER_CONTROL3, 0x0000);
udelay(50000);
lcd_write_reg(R_POWER_CONTROL4, 0x0110);
//~ lcd_clear_display();
lcd_write_reg(R_DISP_CONTROL, 0x0105);
udelay(20000);
lcd_write_reg(R_DISP_CONTROL, 0x0125);
lcd_write_reg(R_DISP_CONTROL, 0x0127);
udelay(20000);
lcd_write_reg(R_DISP_CONTROL, 0x0137);
lcd_send_cmd(R_WRITE_DATA_2_GRAM);
GPIOF_ENABLE |= 0x02;
GPIOF_OUTPUT_EN |= 0x02;
GPIOF_OUTPUT_VAL |= 0x02;
#endif
#ifndef BOOTLOADER
/* The OF won't boot if this is done in the bootloader - ideally we should
tweak the lcd controller speed settings but this will do for now */
CLCD_CLOCK_SRC |= 0xc0000000; /* Set LCD interface clock to PLL */
#endif
/* only these bits are needed from the OF init */
lcd_write_reg(R_DRV_OUTPUT_CONTROL, R_DRV_OUTPUT_CONTROL_NORMAL);
lcd_write_reg(R_ENTRY_MODE, 0x1028);
power_on = true;
display_on = true;
disp_control_rev = 0x0004;
lcd_contrast = DEFAULT_CONTRAST_SETTING << 8;
}
/* THE SLEEP AND POWER FUNCTIONS HAVE NOT BEEN MODIFIED FOR THE YH-925 */
#ifdef HAVE_LCD_SLEEP
static void lcd_power_on(void)
{
/* Be sure standby bit is clear. */
/* BT2-0=000, DC2-0=000, AP2-0=000, SLP=0, STB=0 */
lcd_write_reg(R_POWER_CONTROL1, 0x0000);
/** Power ON Sequence **/
/* Per datasheet Rev.1.10, Jun.21.2003, p. 99 */
lcd_write_reg(R_START_OSC, 0x0001); /* Start Oscillation */
/* 10ms or more for oscillation circuit to stabilize */
sleep(HZ/50);
/* Instruction (1) for power setting; VC2-0, VRH3-0, CAD,
VRL3-0, VCM4-0, VDV4-0 */
/* VC2-0=001 */
lcd_write_reg(R_POWER_CONTROL3, 0x0001);
/* VRL3-0=0100, PON=0, VRH3-0=0001 */
lcd_write_reg(R_POWER_CONTROL4, 0x0401);
/* CAD=1 */
lcd_write_reg(R_POWER_CONTROL2, 0x8000);
/* VCOMG=0, VDV4-0=xxxxx (19), VCM4-0=11000 */
lcd_write_reg(R_POWER_CONTROL5, 0x0018 | lcd_contrast);
/* Instruction (2) for power setting; BT2-0, DC2-0, AP2-0 */
/* BT2-0=000, DC2-0=001, AP2-0=011, SLP=0, STB=0 */
lcd_write_reg(R_POWER_CONTROL1, 0x002c);
/* Instruction (3) for power setting; VCOMG = "1" */
/* VCOMG=1, VDV4-0=xxxxx (19), VCM4-0=11000 */
lcd_write_reg(R_POWER_CONTROL5, 0x2018 | lcd_contrast);
/* 40ms or more; time for step-up circuits 1,2 to stabilize */
sleep(HZ/25);
/* Instruction (4) for power setting; PON = "1" */
/* VRL3-0=0100, PON=1, VRH3-0=0001 */
lcd_write_reg(R_POWER_CONTROL4, 0x0411);
/* 40ms or more; time for step-up circuit 4 to stabilize */
sleep(HZ/25);
/* Instructions for other mode settings (in register order). */
/* SM=0, GS=x, SS=0, NL4-0=10011 (G1-G160)*/
lcd_write_reg(R_DRV_OUTPUT_CONTROL, y_offset ? 0x0013 : 0x0113); /* different to X5 */
/* FLD1-0=01 (1 field), B/C=1, EOR=1 (C-pat), NW5-0=000000 (1 row) */
lcd_write_reg(R_DRV_AC_CONTROL, 0x0700);
/* DIT=0, BGR=1, HWM=0, I/D1-0=10, AM=1, LG2-0=000 */
lcd_write_reg(R_ENTRY_MODE, 0x1028); /* different to X5 */
/* CP15-0=0000000000000000 */
lcd_write_reg(R_COMPARE_REG, 0x0000);
/* NO1-0=01, SDT1-0=00, EQ1-0=00, DIV1-0=00, RTN3-00000 */
lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x4000);
/* SCN4-0=000x0 (G1/G160) */
/* lcd_write_reg(R_GATE_SCAN_START_POS, y_offset ? 0x0000 : 0x0002); */
/* VL7-0=0x00 */
lcd_write_reg(R_VERT_SCROLL_CONTROL, 0x0000);
/* SE17-10(End)=0x9f (159), SS17-10(Start)=0x00 */
lcd_write_reg(R_1ST_SCR_DRV_POS, 0x9f00);
/* SE27-20(End)=0x5c (92), SS27-20(Start)=0x00 */
lcd_write_reg(R_2ND_SCR_DRV_POS, 0x5c00);
/* HEA7-0=7f, HSA7-0=00 */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, 0x7f00);
/* PKP12-10=0x0, PKP02-00=0x0 */
lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0003);
/* PKP32-30=0x4, PKP22-20=0x0 */
lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0400);
/* PKP52-50=0x4, PKP42-40=0x7 */
lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0407);
/* PRP12-10=0x3, PRP02-00=0x5 */
lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0305);
/* PKN12-10=0x0, PKN02-00=0x3 */
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0003);
/* PKN32-30=0x7, PKN22-20=0x4 */
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0704);
/* PKN52-50=0x4, PRN42-40=0x7 */
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0407);
/* PRN12-10=0x5, PRN02-00=0x3 */
lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0503);
/* VRP14-10=0x14, VRP03-00=0x09 */
lcd_write_reg(R_GAMMA_AMP_ADJ_POS, 0x1409);
/* VRN14-00=0x06, VRN03-00=0x02 */
lcd_write_reg(R_GAMMA_AMP_ADJ_NEG, 0x0602);
/* 100ms or more; time for step-up circuits to stabilize */
sleep(HZ/10);
power_on = true;
}
static void lcd_power_off(void)
{
/* Display must be off first */
if (display_on)
lcd_display_off();
power_on = false;
/** Power OFF sequence **/
/* Per datasheet Rev.1.10, Jun.21.2003, p. 99 */
/* Step-up1 halt setting bit */
/* BT2-0=110, DC2-0=001, AP2-0=011, SLP=0, STB=0 */
lcd_write_reg(R_POWER_CONTROL1, 0x062c);
/* Step-up3,4 halt setting bit */
/* VRL3-0=0100, PON=0, VRH3-0=0001 */
lcd_write_reg(R_POWER_CONTROL4, 0x0401);
/* VCOMG=0, VDV4-0=10011, VCM4-0=11000 */
lcd_write_reg(R_POWER_CONTROL5, 0x0018 | lcd_contrast);
/* Wait 100ms or more */
sleep(HZ/10);
/* Step-up2,amp halt setting bit */
/* BT2-0=000, DC2-0=000, AP2-0=000, SLP=0, STB=0 */
lcd_write_reg(R_POWER_CONTROL1, 0x0000);
}
void lcd_sleep(void)
{
if (power_on)
lcd_power_off();
/* Set standby mode */
/* BT2-0=000, DC2-0=000, AP2-0=000, SLP=0, STB=1 */
lcd_write_reg(R_POWER_CONTROL1, 0x0001);
}
#endif
#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
static void lcd_display_off(void)
{
display_on = false;
/** Display OFF sequence **/
/* Per datasheet Rev.1.10, Jun.21.2003, p. 97 */
/* EQ1-0=00 already */
/* PT1-0=00, VLE2-1=00, SPT=0, GON=1, DTE=1, REV=x, D1-0=10 */
lcd_write_reg(R_DISP_CONTROL, 0x0032 | disp_control_rev);
sleep(HZ/25); /* Wait 2 frames or more */
/* PT1-0=00, VLE2-1=00, SPT=0, GON=1, DTE=0, REV=x, D1-0=10 */
lcd_write_reg(R_DISP_CONTROL, 0x0022 | disp_control_rev);
sleep(HZ/25); /* Wait 2 frames or more */
/* PT1-0=00, VLE2-1=00, SPT=0, GON=0, DTE=0, REV=0, D1-0=00 */
lcd_write_reg(R_DISP_CONTROL, 0x0000);
}
#endif
#if defined(HAVE_LCD_ENABLE)
static void lcd_display_on(void)
{
/* Be sure power is on first */
if (!power_on)
lcd_power_on();
/** Display ON Sequence **/
/* Per datasheet Rev.1.10, Jun.21.2003, p. 97 */
/* PT1-0=00, VLE2-1=00, SPT=0, GON=0, DTE=0, REV=0, D1-0=01 */
lcd_write_reg(R_DISP_CONTROL, 0x0001);
sleep(HZ/25); /* Wait 2 frames or more */
/* PT1-0=00, VLE2-1=00, SPT=0, GON=1, DTE=0, REV=x, D1-0=01 */
lcd_write_reg(R_DISP_CONTROL, 0x0021 | disp_control_rev);
/* PT1-0=00, VLE2-1=00, SPT=0, GON=1, DTE=0, REV=x, D1-0=11 */
lcd_write_reg(R_DISP_CONTROL, 0x0023 | disp_control_rev);
sleep(HZ/25); /* Wait 2 frames or more */
/* PT1-0=00, VLE2-1=00, SPT=0, GON=1, DTE=1, REV=x, D1-0=11 */
lcd_write_reg(R_DISP_CONTROL, 0x0033 | disp_control_rev);
display_on = true;
}
void lcd_enable(bool on)
{
if (on == display_on)
return;
if (on)
{
lcd_display_on();
/* Probably out of sync and we don't wanna pepper the code with
lcd_update() calls for this. */
lcd_update();
send_event(LCD_EVENT_ACTIVATION, NULL);
}
else
{
lcd_display_off();
}
}
#endif
#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
bool lcd_active(void)
{
return display_on;
}
#endif
/*** update functions ***/
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(unsigned char const * const src[3],
int width,
int stride);
extern void lcd_write_yuv420_lines_odither(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 */
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)
{
const unsigned char *yuv_src[3];
const unsigned char *ysrc_max;
int y0;
int options;
/* NOT MODIFIED FOR THE YH-925 */
if (!display_on)
return;
width &= ~1;
height &= ~1;
x += x_offset;
/* calculate the drawing region */
/* The 20GB LCD is actually 128x160 but rotated 90 degrees so the origin
* is actually the bottom left and horizontal and vertical are swapped.
* Rockbox expects the origin to be the top left so we need to use
* 127 - y instead of just y */
/* max vert << 8 | start vert */
lcd_write_reg(R_VERT_RAM_ADDR_POS, ((x + width - 1) << 8) | x);
y0 = LCD_HEIGHT - 1 - y + y_offset;
/* DIT=0, BGR=1, HWM=0, I/D1-0=10, AM=0, LG2-0=000 */
lcd_write_reg(R_ENTRY_MODE, 0x1020);
yuv_src[0] = src[0] + src_y * stride + src_x;
yuv_src[1] = src[1] + (src_y * stride >> 2) + (src_x >> 1);
yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
ysrc_max = yuv_src[0] + height * stride;
options = lcd_yuv_options;
do
{
/* max horiz << 8 | start horiz */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (y0 << 8) | (y0 - 1));
/* position cursor (set AD0-AD15) */
/* start vert << 8 | start horiz */
lcd_write_reg(R_RAM_ADDR_SET, (x << 8) | y0);
/* start drawing */
lcd_send_cmd(R_WRITE_DATA_2_GRAM);
if (options & LCD_YUV_DITHER)
{
lcd_write_yuv420_lines_odither(yuv_src, width, stride,
x, y);
y -= 2;
}
else
{
lcd_write_yuv420_lines(yuv_src, width, stride);
}
y0 -= 2;
yuv_src[0] += stride << 1;
yuv_src[1] += stride >> 1;
yuv_src[2] += stride >> 1;
}
while (yuv_src[0] < ysrc_max);
/* DIT=0, BGR=1, HWM=0, I/D1-0=10, AM=1, LG2-0=000 */
lcd_write_reg(R_ENTRY_MODE, 0x1028);
}
/* Update a fraction of the display. */
void lcd_update_rect(int x0, int y0, int width, int height)
{
int x1, y1;
int lcd_x0, lcd_x1, lcd_y0, lcd_y1;
unsigned short *addr;
if (!display_on)
return;
/* calculate the drawing region */
y1 = (y0 + height) - 1; /* max vert */
x1 = (x0 + width) - 1; /* max horiz */
if(x1 >= LCD_WIDTH)
x1 = LCD_WIDTH - 1;
if (x1 <= 0)
return; /* nothing left to do, 0 is harmful to lcd_write_data() */
if(y1 >= LCD_HEIGHT)
y1 = LCD_HEIGHT-1;
/* The LCD is actually 128x160 rotated 90 degrees */
lcd_x0 = (LCD_HEIGHT - 1) - y1 + y_offset;
lcd_x1 = (LCD_HEIGHT - 1) - y0 + y_offset;
lcd_y0 = x0 + x_offset;
lcd_y1 = x1 + x_offset;
/* set the drawing window */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (lcd_x1 << 8) | lcd_x0);
lcd_write_reg(R_VERT_RAM_ADDR_POS, (lcd_y1 << 8) | lcd_y0);
/* set the starting position */
lcd_write_reg(R_RAM_ADDR_SET, (lcd_y0 << 8) | lcd_x1);
/* start drawing */
lcd_send_cmd(R_WRITE_DATA_2_GRAM);
addr = (unsigned short*)FBADDR(x0,y0);
int c, r;
/* for each row */
for (r = 0; r < height; r++) {
/* for each column */
for (c = 0; c < width; c++) {
/* output 1 pixel */
lcd_send_data(*addr++);
}
addr += (LCD_WIDTH - width);
}
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
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