From 8a9832e89ff1bc7a039c8f966f07101570be3d5e Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@linux.ie>
Date: Tue, 3 Nov 2009 13:23:15 +1000
Subject: [PATCH] drm/radeon/kms: disable D1VGA and D2VGA if enabled
Once kms is enabled we don't need these, and it causes a problem
with the Lenovo W500 ACPI brightness implementation, it hangs
in a loop inside an SMI.
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
drivers/gpu/drm/radeon/rv515.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c
index 41a34c23e6d8..03c052d892c0 100644
--- a/drivers/gpu/drm/radeon/rv515.c
+++ b/drivers/gpu/drm/radeon/rv515.c
@@ -137,6 +137,8 @@ int rv515_mc_wait_for_idle(struct radeon_device *rdev)
void rv515_vga_render_disable(struct radeon_device *rdev)
{
+ WREG32(R_000330_D1VGA_CONTROL, 0);
+ WREG32(R_000338_D2VGA_CONTROL, 0);
WREG32(R_000300_VGA_RENDER_CONTROL,
RREG32(R_000300_VGA_RENDER_CONTROL) & C_000300_VGA_VSTATUS_CNTL);
}