From fc162c6cfa06f0b012743d6d79cef45cf0166229 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@neko.keithp.com>
Date: Mon, 16 Apr 2007 09:55:58 -0700
Subject: [PATCH] Allow outputs to be explicitly enabled in config, overriding
 detect.

Option "Enable" "True" will force the server to enable an output at startup
time, even if the output is not connected. This also causes the default
modes to be added for this output, allowing even sync ranges to be used to
pick out standard modes.
(cherry picked from commit a3d73ba2cb7e13a6d129cd88d6a7f7d756e2ced2)
---
 hw/xfree86/modes/xf86Crtc.c | 45 ++++++++++++++++++++++++++++---------
 1 file changed, 35 insertions(+), 10 deletions(-)

diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
index 87820ded4..ad0f5ff4b 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -436,15 +436,29 @@ xf86OutputSetMonitor (xf86OutputPtr output)
 }
 
 static Bool
-xf86OutputEnabled (xf86OutputPtr    output)
+xf86OutputEnabled (xf86OutputPtr output)
 {
-    /* Check to see if this output was disabled in the config file */
-    if (xf86ReturnOptValBool (output->options, OPTION_ENABLE, TRUE) == FALSE ||
-	xf86ReturnOptValBool (output->options, OPTION_DISABLE, FALSE) == TRUE)
+    Bool    enable, disable;
+
+    /* check to see if this output was enabled in the config file */
+    if (xf86GetOptValBool (output->options, OPTION_ENABLE, &enable) && enable)
     {
+	xf86DrvMsg (output->scrn->scrnIndex, X_INFO,
+		    "Output %s enabled by config file\n", output->name);
+	return TRUE;
+    }
+    /* or if this output was disabled in the config file */
+    if (xf86GetOptValBool (output->options, OPTION_DISABLE, &disable) && disable)
+    {
+	xf86DrvMsg (output->scrn->scrnIndex, X_INFO,
+		    "Output %s disabled by config file\n", output->name);
 	return FALSE;
     }
-    return TRUE;
+    /* otherwise, enable if it is not disconnected */
+    enable = output->status != XF86OutputStatusDisconnected;
+    xf86DrvMsg (output->scrn->scrnIndex, X_INFO,
+    	    "Output %s %sconnected\n", output->name, enable ? "" : "dis");
+    return enable;
 }
 
 static Bool
@@ -1232,7 +1246,7 @@ xf86ProbeOutputModes (ScrnInfoPtr scrn, int maxX, int maxY)
 	 */
 	output->status = (*output->funcs->detect)(output);
 
-	if (output->status == XF86OutputStatusDisconnected)
+	if (!xf86OutputEnabled (output))
 	{
 	    xf86OutputSetEDID (output, NULL);
 	    continue;
@@ -1543,8 +1557,7 @@ xf86InitialConfiguration (ScrnInfoPtr scrn, Bool canGrow)
 	xf86OutputPtr output = config->output[o];
 	
 	modes[o] = NULL;
-	enabled[o] = (xf86OutputEnabled (output) &&
-		      output->status != XF86OutputStatusDisconnected);
+	enabled[o] = xf86OutputEnabled (output);
     }
     
     /*
@@ -1589,8 +1602,20 @@ xf86InitialConfiguration (ScrnInfoPtr scrn, Bool canGrow)
     {
 	xf86OutputPtr output = config->output[o];
 	
-	if (enabled[o] && !modes[o])
-	    modes[o] = xf86ClosestMode (output, target_mode, target_rotation, width, height);
+	if (enabled[o])
+	{
+	    if (!modes[o])
+		modes[o] = xf86ClosestMode (output, target_mode,
+					    target_rotation, width, height);
+	    if (!modes[o])
+		xf86DrvMsg (scrn->scrnIndex, X_ERROR,
+			    "Output %s enabled but has no modes\n",
+			    output->name);
+	    else
+		xf86DrvMsg (scrn->scrnIndex, X_INFO,
+			    "Output %s using initial mode %s\n",
+			    output->name, modes[o]->name);
+	}
     }
 
     /*