From bcafdfbed6f1e1f901c2459f60f94a0da506bd90 Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Fri, 13 Feb 2009 14:06:07 -0500
Subject: [PATCH] RANDR: Validate entire mode list for interlace and doublescan

Otherwise drivers have to refuse interlace twice: once in the output
config, and once in ->valid_mode() to catch output and config modes.
If you can't do interlaced modes, asking nicely for it in the config
isn't going to suddenly make it work.
---
 hw/xfree86/modes/xf86Crtc.c  | 11 ++++++++---
 hw/xfree86/modes/xf86Modes.c | 11 ++++-------
 hw/xfree86/modes/xf86Modes.h |  2 +-
 3 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
index 7dbabdac5..f65246ef4 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -1660,8 +1660,7 @@ xf86ProbeOutputModes (ScrnInfoPtr scrn, int maxX, int maxY)
 	}
 
 	if (add_default_modes)
-	    default_modes = xf86GetDefaultModes (output->interlaceAllowed,
-						 output->doubleScanAllowed);
+	    default_modes = xf86GetDefaultModes ();
 
 	/*
 	 * If this is not an RB monitor, remove RB modes from the default
@@ -1698,11 +1697,17 @@ xf86ProbeOutputModes (ScrnInfoPtr scrn, int maxX, int maxY)
 	output->probed_modes = xf86ModesAdd (output->probed_modes, default_modes);
 	
 	/*
-	 * Check all modes against max size
+	 * Check all modes against max size, interlace, and doublescan
 	 */
 	if (maxX && maxY)
 	    xf86ValidateModesSize (scrn, output->probed_modes,
 				       maxX, maxY, 0);
+
+	{
+	    int flags = (output->interlaceAllowed ? V_INTERLACE : 0) |
+			(output->doubleScanAllowed ? V_DBLSCAN : 0);
+	    xf86ValidateModesFlags (scrn, output->probed_modes, flags);
+	}
 	 
 	/*
 	 * Check all modes against output
diff --git a/hw/xfree86/modes/xf86Modes.c b/hw/xfree86/modes/xf86Modes.c
index 033d4aeb4..74d8648ec 100644
--- a/hw/xfree86/modes/xf86Modes.c
+++ b/hw/xfree86/modes/xf86Modes.c
@@ -351,6 +351,9 @@ xf86ValidateModesFlags(ScrnInfoPtr pScrn, DisplayModePtr modeList,
 {
     DisplayModePtr mode;
 
+    if (flags == (V_INTERLACE | V_DBLSCAN))
+	return;
+
     for (mode = modeList; mode != NULL; mode = mode->next) {
 	if (mode->Flags & V_INTERLACE && !(flags & V_INTERLACE))
 	    mode->status = MODE_NO_INTERLACE;
@@ -691,7 +694,7 @@ xf86GetMonitorModes (ScrnInfoPtr pScrn, XF86ConfMonitorPtr conf_monitor)
  * Build a mode list containing all of the default modes
  */
 DisplayModePtr
-xf86GetDefaultModes (Bool interlaceAllowed, Bool doubleScanAllowed)
+xf86GetDefaultModes (void)
 {
     DisplayModePtr  head = NULL, mode;
     int		    i;
@@ -700,13 +703,7 @@ xf86GetDefaultModes (Bool interlaceAllowed, Bool doubleScanAllowed)
     {
 	const DisplayModeRec	*defMode = &xf86DefaultModes[i];
 	
-	if (!interlaceAllowed && (defMode->Flags & V_INTERLACE))
-	    continue;
-	if (!doubleScanAllowed && (defMode->Flags & V_DBLSCAN))
-	    continue;
-
 	mode = xf86DuplicateMode(defMode);
-
 	head = xf86ModesAdd(head, mode);
     }
     return head;
diff --git a/hw/xfree86/modes/xf86Modes.h b/hw/xfree86/modes/xf86Modes.h
index 74cf5e78b..908f59b48 100644
--- a/hw/xfree86/modes/xf86Modes.h
+++ b/hw/xfree86/modes/xf86Modes.h
@@ -106,7 +106,7 @@ extern _X_EXPORT DisplayModePtr
 xf86GetMonitorModes (ScrnInfoPtr pScrn, XF86ConfMonitorPtr conf_monitor);
 
 extern _X_EXPORT DisplayModePtr
-xf86GetDefaultModes (Bool interlaceAllowed, Bool doubleScanAllowed);
+xf86GetDefaultModes (void);
 
 extern _X_EXPORT void
 xf86DDCApplyQuirks(int scrnIndex, xf86MonPtr DDC);