drm/i915: Nuke intel_dp->channel_eq_status

intel_dp->channel_eq_status is used in exactly one function, and we
don't need it to persist between calls. So just go back to using a
local variable instead.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180117192149.17760-4-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/intel_dp_link_training.c

@@ -248,6 +248,7 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp)
 	int tries;
 	u32 training_pattern;
 	uint8_t link_status[DP_LINK_STATUS_SIZE];
+	bool channel_eq = false;
 
 	training_pattern = intel_dp_training_pattern(intel_dp);
 
@@ -259,7 +260,6 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp)
 		return false;
 	}
 
-	intel_dp->channel_eq_status = false;
 	for (tries = 0; tries < 5; tries++) {
 
 		drm_dp_link_train_channel_eq_delay(intel_dp->dpcd);
@@ -279,7 +279,7 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp)
 
 		if (drm_dp_channel_eq_ok(link_status,
 					 intel_dp->lane_count)) {
-			intel_dp->channel_eq_status = true;
+			channel_eq = true;
 			DRM_DEBUG_KMS("Channel EQ done. DP Training "
 				      "successful\n");
 			break;
@@ -301,7 +301,7 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp)
 
 	intel_dp_set_idle_link_train(intel_dp);
 
-	return intel_dp->channel_eq_status;
+	return channel_eq;
 
 }
 

drivers/gpu/drm/i915/intel_drv.h

@@ -1050,7 +1050,6 @@ struct intel_dp {
 	bool link_mst;
 	bool has_audio;
 	bool detect_done;
-	bool channel_eq_status;
 	bool reset_link_params;
 	enum aux_ch aux_ch;
 	uint8_t dpcd[DP_RECEIVER_CAP_SIZE];