drm/radeon/kms: add module option for pcie gen2
Switching to pcie gen2 causes problems on some
boards. Add a module option to turn it on/off.
There are gen2 compatability issues with some
motherboards it seems.
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=33027
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 3a264aa..bd9ee90 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -1372,6 +1372,9 @@
u32 link_width_cntl, lanes, speed_cntl, tmp;
u16 link_cntl2;
+ if (radeon_pcie_gen2 == 0)
+ return;
+
if (rdev->flags & RADEON_IS_IGP)
return;