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Gigabeat S: Try to save some power. Implement lcd_enable and turn off LCD DMA channel when backlight is off.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19953 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2009-02-09 07:01:46 +00:00
parent 9f5687c9e6
commit f7a06dd6fc
3 changed files with 32 additions and 12 deletions
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5
firmware/export/config-gigabeat-s.h
View file

@ -104,11 +104,10 @@
* turned off */
#define LCD_SLEEP_TIMEOUT (2*HZ)
#ifndef BOOTLOADER
#if 0
/* Define this if your LCD can be enabled/disabled */
#define HAVE_LCD_ENABLE
#endif
#ifndef BOOTLOADER
#define HAVE_BACKLIGHT_BRIGHTNESS

4
firmware/target/arm/imx31/gigabeat-s/backlight-imx31.c
View file

@ -23,6 +23,7 @@
#include "backlight.h"
#include "mc13783.h"
#include "backlight-target.h"
#include "lcd.h"
#ifdef HAVE_BACKLIGHT_BRIGHTNESS
/* Table that uses combinations of current level and pwm fraction to get
@ -129,6 +130,9 @@ void _backlight_on(void)
#ifdef HAVE_LCD_SLEEP
backlight_lcd_sleep_countdown(false); /* stop counter */
#endif
#ifdef HAVE_LCD_ENABLE
lcd_enable(true);
#endif
/* Set/clear LEDRAMPUP bit, clear LEDRAMPDOWN bit,
* Ensure LED supply is on. */

35
firmware/target/arm/imx31/gigabeat-s/lcd-imx31.c
View file

@ -30,8 +30,8 @@
#define MAIN_LCD_IDMAC_CHANNEL 14
#define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)])
static volatile bool lcd_on = true;
volatile bool lcd_poweroff = false;
static bool lcd_on = true;
static bool lcd_powered = true;
static unsigned lcd_yuv_options = 0;
/*
** This is imported from lcd-16bit.c
@ -98,24 +98,41 @@ void lcd_update_rect(int x, int y, int width, int height)
}
}
#ifdef HAVE_LCD_SLEEP
void lcd_sleep(void)
{
_backlight_lcd_sleep();
if (lcd_powered)
{
lcd_enable(false);
lcd_powered = false;
IPU_IDMAC_CHA_EN &= ~(1ul << MAIN_LCD_IDMAC_CHANNEL);
_backlight_lcd_sleep();
}
}
#endif /* HAVE_LCD_SLEEP */
#if 0
void lcd_enable(bool state)
{
(void)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();
lcd_call_enable_hook();
}
else
{
lcd_on = false;
}
}
bool lcd_enabled(void)
{
return true;
return lcd_on;
}
#endif
/* Update the display.
This must be called after all other LCD functions that change the display. */