From 5273bb267cfde50fb171a36e7935b56fca13bf66 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@neko.keithp.com>
Date: Fri, 22 Jun 2007 02:08:21 +0100
Subject: [PATCH] Skip driver mode detection/configuration when !vtSema.

When the server is not active, make sure the driver functions related to
mode setting are not called.
---
 hw/xfree86/modes/xf86RandR12.c |   24 +++++++++++++++++++++---
 1 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/hw/xfree86/modes/xf86RandR12.c b/hw/xfree86/modes/xf86RandR12.c
index 532f049..9e82600 100644
--- a/hw/xfree86/modes/xf86RandR12.c
+++ b/hw/xfree86/modes/xf86RandR12.c
@@ -96,9 +96,12 @@ xf86RandR12GetInfo (ScreenPtr pScreen, Rotation *rotations)
     }
 
     /* Re-probe the outputs for new monitors or modes */
-    xf86ProbeOutputModes (scrp, 0, 0);
-    xf86SetScrnInfoModes (scrp);
-    xf86DiDGAReInit (pScreen);
+    if (scrp->vtSema)
+    {
+	xf86ProbeOutputModes (scrp, 0, 0);
+	xf86SetScrnInfoModes (scrp);
+	xf86DiDGAReInit (pScreen);
+    }
 
     for (mode = scrp->modes; ; mode = mode->next)
     {
@@ -797,6 +800,9 @@ xf86RandR12CrtcSetGamma (ScreenPtr    pScreen,
     if (crtc->funcs->gamma_set == NULL)
 	return FALSE;
 
+    if (!crtc->scrn->vtSema)
+	return TRUE;
+
     crtc->funcs->gamma_set(crtc, randr_crtc->gammaRed, randr_crtc->gammaGreen,
 			   randr_crtc->gammaBlue, randr_crtc->gammaSize);
 
@@ -817,6 +823,11 @@ xf86RandR12OutputSetProperty (ScreenPtr pScreen,
     if (output->funcs->set_property == NULL)
 	return TRUE;
 
+    /*
+     * This function gets called even when vtSema is FALSE, as
+     * drivers will need to remember the correct value to apply
+     * when the VT switch occurs
+     */
     return output->funcs->set_property(output, property, value);
 }
 
@@ -830,6 +841,11 @@ xf86RandR12OutputValidateMode (ScreenPtr    pScreen,
     DisplayModeRec  mode;
 
     xf86RandRModeConvert (pScrn, randr_mode, &mode);
+    /*
+     * This function may be called when vtSema is FALSE, so
+     * the underlying function must either avoid touching the hardware
+     * or return FALSE when vtSema is FALSE
+     */
     if (output->funcs->mode_valid (output, &mode) != MODE_OK)
 	return FALSE;
     return TRUE;
@@ -990,6 +1006,8 @@ xf86RandR12GetInfo12 (ScreenPtr pScreen, Rotation *rotations)
 {
     ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
 
+    if (!pScrn->vtSema)
+	return TRUE;
     xf86ProbeOutputModes (pScrn, 0, 0);
     xf86SetScrnInfoModes (pScrn);
     xf86DiDGAReInit (pScreen);
-- 
1.5.2.4