video: exynos_dp: Change aux transaction failures

This patch adds the function name to aux transaction failure messages
so we can tell which transaction is failing. It also changes the level
of Aux Transaction fail messages from error to debug. We retry the
transactions a few times and will report errors if warranted outside of
this function.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

diff --git a/drivers/video/exynos/exynos_dp_reg.c b/drivers/video/exynos/exynos_dp_reg.c
index 174c445e18c166a4d06473b3e91d2f7034bf29a6..f5f1df770391b000885608625f8a5adda0129bcd 100644 (file)
--- a/drivers/video/exynos/exynos_dp_reg.c
+++ b/drivers/video/exynos/exynos_dp_reg.c
@@ -479,7 +479,8 @@ int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp,
                if (retval == 0)
                        break;
                else
-                       dev_err(dp->dev, "Aux Transaction fail!\n");
+                       dev_dbg(dp->dev, "%s: Aux Transaction fail!\n",
+                               __func__);
        }
 
        return retval;
@@ -519,7 +520,8 @@ int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp,
                if (retval == 0)
                        break;
                else
-                       dev_err(dp->dev, "Aux Transaction fail!\n");
+                       dev_dbg(dp->dev, "%s: Aux Transaction fail!\n",
+                               __func__);
        }
 
        /* Read data buffer */
@@ -583,7 +585,8 @@ int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp,
                        if (retval == 0)
                                break;
                        else
-                               dev_err(dp->dev, "Aux Transaction fail!\n");
+                               dev_dbg(dp->dev, "%s: Aux Transaction fail!\n",
+                                       __func__);
                }
 
                start_offset += cur_data_count;
@@ -640,7 +643,8 @@ int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp,
                        if (retval == 0)
                                break;
                        else
-                               dev_err(dp->dev, "Aux Transaction fail!\n");
+                               dev_dbg(dp->dev, "%s: Aux Transaction fail!\n",
+                                       __func__);
                }
 
                for (cur_data_idx = 0; cur_data_idx < cur_data_count;
@@ -685,7 +689,7 @@ int exynos_dp_select_i2c_device(struct exynos_dp_device *dp,
        /* Start AUX transaction */
        retval = exynos_dp_start_aux_transaction(dp);
        if (retval != 0)
-               dev_err(dp->dev, "Aux Transaction fail!\n");
+               dev_dbg(dp->dev, "%s: Aux Transaction fail!\n", __func__);
 
        return retval;
 }
@@ -725,7 +729,8 @@ int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp,
                if (retval == 0)
                        break;
                else
-                       dev_err(dp->dev, "Aux Transaction fail!\n");
+                       dev_dbg(dp->dev, "%s: Aux Transaction fail!\n",
+                               __func__);
        }
 
        /* Read data */
@@ -785,7 +790,9 @@ int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp,
                                if (retval == 0)
                                        break;
                                else
-                                       dev_err(dp->dev, "Aux Transaction fail!\n");
+                                       dev_dbg(dp->dev,
+                                               "%s: Aux Transaction fail!\n",
+                                               __func__);
                        }
                        /* Check if Rx sends defer */
                        reg = readl(dp->reg_base + EXYNOS_DP_AUX_RX_COMM);