drm/i915: Include the AUX CH name in the debug messages

To make it easier to figure out what caused a particular debug
message let's print out aux->name.

v2: Rebase for drm_err() & co.
    Add some punctuation to the messages (Matt)
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200123154542.12271-2-ville.syrjala@linux.intel.comReviewed-by: Matt Roper <matthew.d.roper@intel.com>

drivers/gpu/drm/i915/display/intel_dp.c

@@ -1193,7 +1193,7 @@ intel_dp_aux_wait_done(struct intel_dp *intel_dp)
 
 	if (!done)
 		drm_err(&i915->drm,
-			"%s did not complete or timeout within %ums (status 0x%08x)\n",
+			"%s: did not complete or timeout within %ums (status 0x%08x)\n",
 			intel_dp->aux.name, timeout_ms, status);
 #undef C
 
@@ -1380,8 +1380,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
 		const u32 status = intel_uncore_read(uncore, ch_ctl);
 
 		if (status != intel_dp->aux_busy_last_status) {
-			WARN(1, "dp_aux_ch not started status 0x%08x\n",
-			     status);
+			WARN(1, "%s: not started (status 0x%08x)\n",
+			     intel_dp->aux.name, status);
 			intel_dp->aux_busy_last_status = status;
 		}
 
@@ -1442,8 +1442,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
 	}
 
 	if ((status & DP_AUX_CH_CTL_DONE) == 0) {
-		drm_err(&i915->drm, "dp_aux_ch not done status 0x%08x\n",
-			status);
+		drm_err(&i915->drm, "%s: not done (status 0x%08x)\n",
+			intel_dp->aux.name, status);
 		ret = -EBUSY;
 		goto out;
 	}
@@ -1453,8 +1453,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
 	 * Timeouts occur when the sink is not connected
 	 */
 	if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
-		drm_err(&i915->drm, "dp_aux_ch receive error status 0x%08x\n",
-			status);
+		drm_err(&i915->drm, "%s: receive error (status 0x%08x)\n",
+			intel_dp->aux.name, status);
 		ret = -EIO;
 		goto out;
 	}
@@ -1462,8 +1462,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
 	/* Timeouts occur when the device isn't connected, so they're
 	 * "normal" -- don't fill the kernel log with these */
 	if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
-		drm_dbg_kms(&i915->drm, "dp_aux_ch timeout status 0x%08x\n",
-			    status);
+		drm_dbg_kms(&i915->drm, "%s: timeout (status 0x%08x)\n",
+			    intel_dp->aux.name, status);
 		ret = -ETIMEDOUT;
 		goto out;
 	}
@@ -1479,8 +1479,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
 	 */
 	if (recv_bytes == 0 || recv_bytes > 20) {
 		drm_dbg_kms(&i915->drm,
-			    "Forbidden recv_bytes = %d on aux transaction\n",
-			    recv_bytes);
+			    "%s: Forbidden recv_bytes = %d on aux transaction\n",
+			    intel_dp->aux.name, recv_bytes);
 		ret = -EBUSY;
 		goto out;
 	}