soundwire: cadence_master: log more useful information during timeouts

Add the type of command, device number, register offset and length to
reverse engineer what caused the issue.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200110215731.30747-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 847b8f5..6ef2f75 100644 (file)
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -447,7 +447,8 @@ _cdns_xfer_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int cmd,
        time = wait_for_completion_timeout(&cdns->tx_complete,
                                           msecs_to_jiffies(CDNS_TX_TIMEOUT));
        if (!time) {
-               dev_err(cdns->dev, "IO transfer timed out\n");
+               dev_err(cdns->dev, "IO transfer timed out, cmd %d device %d addr %x len %d\n",
+                       cmd, msg->dev_num, msg->addr, msg->len);
                msg->len = 0;
                return SDW_CMD_TIMEOUT;
        }