drm/i915: check the return value of intel_dp_i2c_init

We've been ignoring this return value, so print a nice backtrace in
case it's not what we expected.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Zoltan Nyul <zoltan.nyul@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index ed1d34680125..591502c6f34c 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3044,7 +3044,7 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
         struct drm_i915_private *dev_priv = dev->dev_private;
         enum port port = intel_dig_port->port;
         const char *name = NULL;
-        int type;
+        int type, error;
 
         /* Preserve the current hw state. */
         intel_dp->DP = I915_READ(intel_dp->output_reg);
@@ -3142,7 +3142,9 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
                 BUG();
         }
 
-        intel_dp_i2c_init(intel_dp, intel_connector, name);
+        error = intel_dp_i2c_init(intel_dp, intel_connector, name);
+        WARN(error, "intel_dp_i2c_init failed with error %d for port %c\n",
+             error, port_name(port));
 
         if (!intel_edp_init_connector(intel_dp, intel_connector)) {
                 i2c_del_adapter(&intel_dp->adapter);