drm/i915: WARN for eDP encoders in intel_dp_detect_dpcd()

We are not calling this function for eDP, so add an early assert about
this for clarity.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190509173446.31095-7-imre.deak@intel.com

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 700ceac..1e01199 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4844,15 +4844,15 @@ intel_dp_detect_dpcd(struct intel_dp *intel_dp)
        u8 *dpcd = intel_dp->dpcd;
        u8 type;
 
+       if (WARN_ON(intel_dp_is_edp(intel_dp)))
+               return connector_status_connected;
+
        if (lspcon->active)
                lspcon_resume(lspcon);
 
        if (!intel_dp_get_dpcd(intel_dp))
                return connector_status_disconnected;
 
-       if (intel_dp_is_edp(intel_dp))
-               return connector_status_connected;
-
        /* if there's no downstream port, we're done */
        if (!drm_dp_is_branch(dpcd))
                return connector_status_connected;