From 4e56465a79587c4df6bf1dfd7cc87a4f22707a8f Mon Sep 17 00:00:00 2001
From: Aaron Plattner <aplattner@nvidia.com>
Date: Thu, 7 Jun 2007 18:28:56 -0700
Subject: G80: Mode validation.

Disable LVDS modes larger than the native resolution.
Disable dual-link TMDS modes for now since they don't work reliably.
---
 src/g80_sor.c | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

(limited to 'src/g80_sor.c')

diff --git a/src/g80_sor.c b/src/g80_sor.c
index a51e5e0..2ab9f2e 100644
--- a/src/g80_sor.c
+++ b/src/g80_sor.c
@@ -65,6 +65,30 @@ G80SorDPMSSet(xf86OutputPtr output, int mode)
     while((pNv->reg[(0x61C030+off)/4] & 0x10000000));
 }
 
+static int
+G80TMDSModeValid(xf86OutputPtr output, DisplayModePtr mode)
+{
+    // Disable dual-link modes until I can find a way to make them work
+    // reliably.
+    if (mode->Clock > 165000)
+        return MODE_CLOCK_HIGH;
+
+    return G80OutputModeValid(output, mode);
+}
+
+static int
+G80LVDSModeValid(xf86OutputPtr output, DisplayModePtr mode)
+{
+    G80OutputPrivPtr pPriv = output->driver_private;
+    DisplayModePtr native = pPriv->nativeMode;
+
+    // Ignore modes larger than the native res.
+    if (mode->HDisplay > native->HDisplay || mode->VDisplay > native->VDisplay)
+        return MODE_PANEL;
+
+    return G80OutputModeValid(output, mode);
+}
+
 static void
 G80SorModeSet(xf86OutputPtr output, DisplayModePtr mode,
               DisplayModePtr adjusted_mode)
@@ -180,7 +204,7 @@ static const xf86OutputFuncsRec G80SorTMDSOutputFuncs = {
     .dpms = G80SorDPMSSet,
     .save = NULL,
     .restore = NULL,
-    .mode_valid = G80OutputModeValid,
+    .mode_valid = G80TMDSModeValid,
     .mode_fixup = G80OutputModeFixup,
     .prepare = G80OutputPrepare,
     .commit = G80OutputCommit,
@@ -194,7 +218,7 @@ static const xf86OutputFuncsRec G80SorLVDSOutputFuncs = {
     .dpms = G80SorDPMSSet,
     .save = NULL,
     .restore = NULL,
-    .mode_valid = G80OutputModeValid,
+    .mode_valid = G80LVDSModeValid,
     .mode_fixup = G80SorModeFixupScale,
     .prepare = G80OutputPrepare,
     .commit = G80OutputCommit,
-- 
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