From 9f9317159fdafe3d7fc64cf41f299c71c064db83 Mon Sep 17 00:00:00 2001
From: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Date: Wed, 22 Feb 2012 18:53:08 +0000
Subject: [PATCH 44/95] viafb: fix IGA1 modesetting on VX900

commit e29206381a1436e0f47c0f5b9a23159a03c57715 upstream.

Even if the documentation calls this bit "Reserved" it has to be set
to 0 for correct modesetting on IGA1.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/video/via/hw.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c
index 8bdf80e..8497727 100644
--- a/drivers/video/via/hw.c
+++ b/drivers/video/via/hw.c
@@ -1810,6 +1810,9 @@ static void hw_init(void)
 		break;
 	}
 
+	/* magic required on VX900 for correct modesetting on IGA1 */
+	via_write_reg_mask(VIACR, 0x45, 0x00, 0x01);
+
 	/* probably this should go to the scaling code one day */
 	via_write_reg_mask(VIACR, 0xFD, 0, 0x80); /* VX900 hw scale on IGA2 */
 	viafb_write_regx(scaling_parameters, ARRAY_SIZE(scaling_parameters));
-- 
1.7.9.4

