diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2013-07-01 20:16:59 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2013-07-01 20:16:59 +0000 |
| commit | c404474b5df9c5c3dfa37cc938b8f25ab554cd3e (patch) | |
| tree | 03eb25f45130db1e03dd5b8dff1dede260983be7 /sys/dev/pci | |
| parent | 5ffe820877cc1d6f77a9558863f6a6b6ccda391f (diff) | |
The fast scrolling code causes random page table errors on older hardware.
Disable that code and use the write-only rasops code instead on the affected
chips.
Diffstat (limited to 'sys/dev/pci')
| -rw-r--r-- | sys/dev/pci/drm/i915/i915_drv.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/dev/pci/drm/i915/i915_drv.c b/sys/dev/pci/drm/i915/i915_drv.c index 67b939f43e5..cacc44a94f1 100644 --- a/sys/dev/pci/drm/i915/i915_drv.c +++ b/sys/dev/pci/drm/i915/i915_drv.c @@ -1,4 +1,4 @@ -/* $OpenBSD: i915_drv.c,v 1.33 2013/06/06 16:14:26 jsg Exp $ */ +/* $OpenBSD: i915_drv.c,v 1.34 2013/07/01 20:16:58 kettenis Exp $ */ /* * Copyright (c) 2008-2009 Owain G. Ainsworth <oga@openbsd.org> * @@ -1227,6 +1227,16 @@ inteldrm_attach(struct device *parent, struct device *self, void *aux) dev_priv->sc_copyrows = ri->ri_copyrows; ri->ri_copyrows = inteldrm_copyrows; + /* + * On older hardware the fast scrolling code causes page table + * errors. As a workaround, we set the "avoid framebuffer + * reads" flag, which has the side-effect of disabling the + * fast scrolling code, but still gives us a half-decent + * scrolling speed. + */ + if (INTEL_INFO(dev)->gen < 3 || IS_I915G(dev) || IS_I915GM(dev)) + ri->ri_flg |= RI_WRONLY; + inteldrm_stdscreen.capabilities = ri->ri_caps; inteldrm_stdscreen.nrows = ri->ri_rows; inteldrm_stdscreen.ncols = ri->ri_cols; |