Commit 14d94a3d authored by Seth Forshee's avatar Seth Forshee Committed by Daniel Vetter
Browse files

drm/i915: ignore pipe select bit when checking for LVDS register initialization



The Lenovo Thinkpad T410 has the LVDS_PIPEB_SELECT bit set in the LVDS
register when booted with the lid closed, even though the LVDS hasn't
really been initialized. Ignore this bit so that the VBT value will be
used instead.
Signed-off-by: default avatarSeth Forshee <seth.forshee@canonical.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 93314b5b
......@@ -434,7 +434,7 @@ static bool is_dual_link_lvds(struct drm_i915_private *dev_priv,
* register is uninitialized.
*/
val = I915_READ(reg);
if (!(val & ~LVDS_DETECTED))
if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
val = dev_priv->bios_lvds_val;
dev_priv->lvds_val = val;
}
......
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