drm/i915: fix panel unlock register mask

Use the correct mask for the unlock bits. In theory this could have lead
to incorrect asserts but this is unlikely in practise.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 921594f..8245fe5 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1210,7 +1210,7 @@ static void assert_panel_unlocked(struct drm_i915_private *dev_priv,
 
        val = I915_READ(pp_reg);
        if (!(val & PANEL_POWER_ON) ||
-           ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS))
+           ((val & PANEL_UNLOCK_MASK) == PANEL_UNLOCK_REGS))
                locked = false;
 
        if (I915_READ(lvds_reg) & LVDS_PIPEB_SELECT)