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Add support for powering down the LCD (saves 50 mA when disabled)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20547 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Karl Kurbjun 2009-03-26 22:20:46 +00:00
parent b084d60356
commit 9d1b99534e
3 changed files with 74 additions and 7 deletions
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10
firmware/target/arm/tms320dm320/mrobe-500/backlight-mr500.c
View file

@ -30,12 +30,22 @@
void _backlight_on(void)
{
#ifdef HAVE_LCD_SLEEP
backlight_lcd_sleep_countdown(false); /* stop counter */
#endif
#ifdef HAVE_LCD_ENABLE
lcd_enable(true); /* power on lcd + visible display */
#endif
_backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
}
void _backlight_off(void)
{
_backlight_set_brightness(0);
#ifdef HAVE_LCD_SLEEP
/* Disable lcd after fade completes (when lcd_sleep timeout expires) */
backlight_lcd_sleep_countdown(true); /* start countdown */
#endif
}
/* Assumes that the backlight has been initialized */

59
firmware/target/arm/tms320dm320/mrobe-500/lcd-mr500.c
View file

@ -38,7 +38,11 @@
extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
int width, int height);
static volatile bool lcd_on = true;
static bool lcd_on = true;
#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
static bool lcd_powered = true;
#endif
volatile bool lcd_poweroff = false;
/*
** These are imported from lcd-16bit.c
@ -46,10 +50,55 @@ volatile bool lcd_poweroff = false;
extern unsigned fg_pattern;
extern unsigned bg_pattern;
#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
bool lcd_active(void)
{
return lcd_on;
}
#endif
#if defined(HAVE_LCD_SLEEP)
void lcd_sleep()
{
if (lcd_powered)
{
/* "not powered" implies "disabled" */
if (lcd_on)
lcd_enable(false);
IO_GIO_BITCLR2=1<<4;
lcd_powered=false;
}
}
#endif
#if defined(HAVE_LCD_ENABLE)
void lcd_enable(bool state)
{
if (state == lcd_on)
return;
if(state)
{
/* "enabled" implies "powered" */
if (!lcd_powered)
{
lcd_powered=true;
IO_GIO_BITSET2=1<<4;
/* Wait long enough for a frame to be written - yes, it
* takes awhile. */
sleep(HZ/5);
}
lcd_on = true;
lcd_update();
lcd_activation_call_hook();
}
else
{
lcd_on = false;
}
}
#endif
/* LCD init - based on code from ingenient-bsp/bootloader/board/dm320/splash.c
* and code by Catalin Patulea from the M:Robe 500i linux port
@ -80,6 +129,9 @@ void lcd_init_device(void)
IO_OSD_OSDWIN0YP=0;
IO_OSD_OSDWIN0XL=480;
IO_OSD_OSDWIN0YL=640;
/* Set pin 36 to an output */
IO_GIO_DIR2&=!(1<<4);
}
/* Update a fraction of the display. */
@ -138,11 +190,6 @@ void lcd_update_rect(int x, int y, int width, int height)
#endif
}
void lcd_enable(bool state)
{
(void)state;
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)