rk32 dp: set lane and rate to 0 when get them via dpcd failed

diff --git a/drivers/video/rockchip/transmitter/rk32_dp.c b/drivers/video/rockchip/transmitter/rk32_dp.c
index f9aa3dc8862022ce4d474e0ae3c5f53759122b9d..1ad732065a65484d61db1074a9d16f500d18fe79 100644 (file)
--- a/drivers/video/rockchip/transmitter/rk32_dp.c
+++ b/drivers/video/rockchip/transmitter/rk32_dp.c
@@ -837,7 +837,7 @@ static int rk32_edp_get_max_rx_bandwidth(struct rk32_edp *edp,
                                        u8 *bandwidth)
 {
        u8 data;
-       int retval;
+       int retval = 0;
 
        /*
         * For DP rev.1.1, Maximum link rate of Main Link lanes
@@ -846,10 +846,11 @@ static int rk32_edp_get_max_rx_bandwidth(struct rk32_edp *edp,
        retval = rk32_edp_read_byte_from_dpcd(edp,
                        DPCD_MAX_LINK_RATE, &data);
        if (retval < 0)
-               return retval;
+               *bandwidth = 0;
+       else
+               *bandwidth = data;
+       return retval;
 
-       *bandwidth = data;
-       return 0;
 }
 
 static int rk32_edp_get_max_rx_lane_count(struct rk32_edp *edp,
@@ -865,10 +866,10 @@ static int rk32_edp_get_max_rx_lane_count(struct rk32_edp *edp,
        retval = rk32_edp_read_byte_from_dpcd(edp,
                        DPCD_MAX_LANE_CNT, &data);
        if (retval < 0)
-               return retval;
-
-       *lane_count = DPCD_MAX_LANE_COUNT(data);
-       return 0;
+               *lane_count = 0;
+       else
+               *lane_count = DPCD_MAX_LANE_COUNT(data);
+       return retval;
 }
 
 static int rk32_edp_init_training(struct rk32_edp *edp)