Set the CHV_GPIO_GPIOEN bit when updating GPIOs from chv_exec_gpio.

Fixes: a0a6d4ffd2ad ("drm/i915/dsi: add support for gpio elements on CHV")
Cc: sta...@vger.kernel.org
Cc: Jani Nikula <jani.nik...@intel.com>
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Signed-off-by: Hans de Goede <hdego...@redhat.com>
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c 
b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index 579d2f5..47cd1b2 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -300,7 +300,8 @@ static void chv_exec_gpio(struct drm_i915_private *dev_priv,
        mutex_lock(&dev_priv->sb_lock);
        vlv_iosf_sb_write(dev_priv, port, cfg1, 0);
        vlv_iosf_sb_write(dev_priv, port, cfg0,
-                         CHV_GPIO_GPIOCFG_GPO | CHV_GPIO_GPIOTXSTATE(value));
+                         CHV_GPIO_GPIOEN | CHV_GPIO_GPIOCFG_GPO |
+                         CHV_GPIO_GPIOTXSTATE(value));
        mutex_unlock(&dev_priv->sb_lock);
 }
 
-- 
2.9.3

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