devmouse: refactor screen blanking logic

devmouse controls the screen blanking timeout, so move the
code there avoiding cross calls between modules. the only
function that needs to be provided is blankscreen(), which
gets called with drawlock locked.

the blank timeout is set thru /dev/mousectl now, so kernels
without devvga can set it.

blanking now only happens while /dev/mouse is read. so this
avoids accidentally blanking the screen on cpu servers that
do not have a mouse to unblank it.

1 files changed, 0 insertions, 37 deletions

diff --git a/sys/src/9/port/devdraw.c b/sys/src/9/port/devdraw.c
index b5053064c..0fe5f2e7a 100644
--- a/sys/src/9/port/devdraw.c
+++ b/sys/src/9/port/devdraw.c
@@ -50,8 +50,6 @@ typedef struct Refresh Refresh;
 typedef struct Refx Refx;
 typedef struct DName DName;
 
-ulong blanktime = 30;	/* in minutes; a half hour */
-
 struct Draw
 {
 	int		clientid;
@@ -61,8 +59,6 @@ struct Draw
 	DName*		name;
 	int		vers;
 	int		softscreen;
-	int		blanked;	/* screen turned off */
-	ulong		blanktime;	/* time of last operation */
 };
 
 struct Client
@@ -2147,36 +2143,3 @@ drawcmap(void)
 		    }
 	}
 }
-
-void
-drawblankscreen(int blank)
-{
-	if(blank == sdraw.blanked)
-		return;
-	if(up != nil && islo() && candlock()){
-		blankscreen(blank);
-		sdraw.blanked = blank;
-		dunlock();
-	}
-}
-
-/*
- * record activity on screen, changing blanking as appropriate
- */
-void
-drawactive(int active)
-{
-	if(active){
-		drawblankscreen(0);
-		sdraw.blanktime = MACHP(0)->ticks;
-	}else{
-		if(blanktime && sdraw.blanktime && TK2SEC(MACHP(0)->ticks - sdraw.blanktime)/60 >= blanktime)
-			drawblankscreen(1);
-	}
-}
-
-int
-drawidletime(void)
-{
-	return TK2SEC(MACHP(0)->ticks - sdraw.blanktime)/60;
-}