From 137948804b52bd4533f5cef2f70bd4957f32b91a Mon Sep 17 00:00:00 2001
From: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: Sun, 4 Mar 2012 17:48:41 +0100
Subject: [PATCH] libtriple: implement option to keep LCD backlight on in
 standby

Based on an idea by Kim Danielmeier, keep the backlight on if
TRIPLE_LCDBACKLIGHT environment variable is set.
---
 libtriple/README.libtriple |  5 ++++-
 libtriple/pwrmngr.cpp      | 13 +++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/libtriple/README.libtriple b/libtriple/README.libtriple
index 89f65b7..c13dbf8 100644
--- a/libtriple/README.libtriple
+++ b/libtriple/README.libtriple
@@ -8,7 +8,10 @@ environment variables, which are described here:
 TRIPLE_NOSCART=1 - makes neutrino *not* do any voltage switching on
 	SCART pin 8, probably not useful for anyone but me
 
-TRIPLE_DEBUG=... - controls various debugging levels in libtriple
+TRIPLE_LCDBACKLIGHT=1 - makes the LCD backlight stay on in standby,
+			may disturb others
+
+HAL_DEBUG=... - controls various debugging levels in libtriple
 	valid values for the different component:
 		audio   0x01
 		video   0x02
diff --git a/libtriple/pwrmngr.cpp b/libtriple/pwrmngr.cpp
index f16297e..e526246 100644
--- a/libtriple/pwrmngr.cpp
+++ b/libtriple/pwrmngr.cpp
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <cstdlib>
 
 #include "pwrmngr.h"
 #include "lt_debug.h"
@@ -9,8 +10,10 @@
 #include <sys/types.h>
 
 #include <avs/avs_inf.h>
+#include <tdpanel/lcdstuff.h>
 
 #define lt_debug(args...) _lt_debug(TRIPLE_DEBUG_PWRMNGR, this, args)
+#define lt_info(args...) _lt_info(TRIPLE_DEBUG_PWRMNGR, this, args)
 void cCpuFreqManager::Up(void) { lt_debug("%s\n", __FUNCTION__); }
 void cCpuFreqManager::Down(void) { lt_debug("%s\n", __FUNCTION__); }
 void cCpuFreqManager::Reset(void) { lt_debug("%s\n", __FUNCTION__); }
@@ -55,6 +58,16 @@ bool cCpuFreqManager::SetCpuFreq(unsigned long f)
 	{
 		ioctl(fd, IOC_AVS_SET_VOLUME, 31); /* mute AVS to avoid ugly noise */
 		ioctl(fd, IOC_AVS_STANDBY_ENTER);
+		if (getenv("TRIPLE_LCDBACKLIGHT"))
+		{
+			lt_info("%s: TRIPLE_LCDBACKLIGHT is set: keeping LCD backlight on\n", __func__);
+			close(fd);
+			fd = open("/dev/stb/tdlcd", O_RDONLY);
+			if (fd < 0)
+				lt_info("%s: open tdlcd error: %m\n", __func__);
+			else
+				ioctl(fd, IOC_LCD_BACKLIGHT_ON);
+		}
 	}
 	else
 	{