xserver: Branch 'server-1.3-branch'
Keith Packard
keithp at kemper.freedesktop.org
Sun Mar 18 05:14:06 EET 2007
hw/xfree86/ddc/xf86DDC.c | 6 ++++++
1 files changed, 6 insertions(+)
New commits:
diff-tree 0f80340a526b2838b9f39145f29941222e84184b (from 52fccb9d9fdbb1c9dc3f5225600004cd94e42a4a)
Author: Keith Packard <keithp at neko.keithp.com>
Date: Sat Mar 17 20:14:05 2007 -0700
Slow down DDC I2C bus using a RiseFallTime of 20us for old monitors.
This time value makes the bus run slowly enough for even the least reliable
of monitors. Thanks to Pavel Troller for finding the necessary change.
diff --git a/hw/xfree86/ddc/xf86DDC.c b/hw/xfree86/ddc/xf86DDC.c
index 0f24c52..8080c8d 100644
--- a/hw/xfree86/ddc/xf86DDC.c
+++ b/hw/xfree86/ddc/xf86DDC.c
@@ -337,6 +337,12 @@ DDCRead_DDC2(int scrnIndex, I2CBusPtr pB
unsigned char *R_Buffer;
int i;
+ /*
+ * Slow down the bus so that older monitors don't
+ * miss things.
+ */
+ pBus->RiseFallTime = 20;
+
if (!(dev = xf86I2CFindDev(pBus, 0x00A0))) {
dev = xf86CreateI2CDevRec();
dev->DevName = "ddc2";
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