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[Qemu-devel] [PATCH 04/10] hw/arm_sysctl: Implement SYS_CFG_DVIMODE as a


From: Peter Maydell
Subject: [Qemu-devel] [PATCH 04/10] hw/arm_sysctl: Implement SYS_CFG_DVIMODE as a no-op
Date: Mon, 4 Feb 2013 13:44:30 +0000

SYS_CFG_DVIMODE allows the guest to select whether the
output DVI signal is VGA, SVGA, XGA, SGA or UXGA. Since
this makes no difference to QEMU, implement writes as a
no-op so Linux doesn't complain.

Signed-off-by: Peter Maydell <address@hidden>
---
 hw/arm_sysctl.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/arm_sysctl.c b/hw/arm_sysctl.c
index 960b664..bb56238 100644
--- a/hw/arm_sysctl.c
+++ b/hw/arm_sysctl.c
@@ -295,6 +295,14 @@ static bool vexpress_cfgctrl_write(arm_sysctl_state *s, 
unsigned int dcc,
             return true;
         }
         break;
+    case SYS_CFG_DVIMODE:
+        if (site == SYS_CFG_SITE_MB && device == 0) {
+            /* Selecting DVI mode is meaningless for QEMU: we will
+             * always display the output correctly according to the
+             * pixel height/width programmed into the CLCD controller.
+             */
+            return true;
+        }
     default:
         break;
     }
-- 
1.7.9.5




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