phy: cadence-torrent: Add debug information for PHY configuration

Add debug information in probe regarding PHY configuration parameters
like single link or multilink protocol along with number of lanes
used for each protocol link.

Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/20210728145454.15945-9-sjakhade@cadence.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index e4dd8d1..4024db0 100644 (file)
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c
@@ -573,6 +573,24 @@ static const struct coefficients vltg_coeff[4][4] = {
        }
 };
 
+static const char *cdns_torrent_get_phy_type(enum cdns_torrent_phy_type phy_type)
+{
+       switch (phy_type) {
+       case TYPE_DP:
+               return "DisplayPort";
+       case TYPE_PCIE:
+               return "PCIe";
+       case TYPE_SGMII:
+               return "SGMII";
+       case TYPE_QSGMII:
+               return "QSGMII";
+       case TYPE_USB:
+               return "USB";
+       default:
+               return "None";
+       }
+}
+
 /*
  * Set registers responsible for enabling and configuring SSC, with second and
  * third register values provided by parameters.
@@ -2392,10 +2410,9 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
                                init_dp_regmap++;
                        }
 
-                       dev_info(dev, "%d lanes, max bit rate %d.%03d Gbps\n",
-                                cdns_phy->phys[node].num_lanes,
-                                cdns_phy->max_bit_rate / 1000,
-                                cdns_phy->max_bit_rate % 1000);
+                       dev_dbg(dev, "DP max bit rate %d.%03d Gbps\n",
+                               cdns_phy->max_bit_rate / 1000,
+                               cdns_phy->max_bit_rate % 1000);
 
                        gphy->attrs.bus_width = cdns_phy->phys[node].num_lanes;
                        gphy->attrs.max_link_rate = cdns_phy->max_bit_rate;
@@ -2427,6 +2444,17 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
                goto put_lnk_rst;
        }
 
+       if (cdns_phy->nsubnodes > 1)
+               dev_dbg(dev, "Multi-link: %s (%d lanes) & %s (%d lanes)",
+                       cdns_torrent_get_phy_type(cdns_phy->phys[0].phy_type),
+                       cdns_phy->phys[0].num_lanes,
+                       cdns_torrent_get_phy_type(cdns_phy->phys[1].phy_type),
+                       cdns_phy->phys[1].num_lanes);
+       else
+               dev_dbg(dev, "Single link: %s (%d lanes)",
+                       cdns_torrent_get_phy_type(cdns_phy->phys[0].phy_type),
+                       cdns_phy->phys[0].num_lanes);
+
        return 0;
 
 put_child: