drm/msm/dp: Clean up logs dp_power module

The clk_bulk API already provides error messages indicating which
specific clock in the request for which the operation failed, further
more these errors are associated with the specific DisplayPort
controller (rather than the shared drm_device). The additional error
messages int he dp_power module does thereby not provide any benefit.

While at it, none of the dp_power handles passed to these functions are
dynamic in nature, so there should not be any need for runtime checking
them. Drop these as well.
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/536938/
Link: https://lore.kernel.org/r/20230515030256.300104-2-quic_bjorande@quicinc.comSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/dp/dp_power.c

@@ -35,25 +35,16 @@ static int dp_power_clk_init(struct dp_power_private *power)
 	stream = &power->parser->mp[DP_STREAM_PM];
 
 	rc = devm_clk_bulk_get(dev, core->num_clk, core->clocks);
-	if (rc) {
-		DRM_ERROR("failed to get %s clk. err=%d\n",
-			dp_parser_pm_name(DP_CORE_PM), rc);
+	if (rc)
 		return rc;
-	}
 
 	rc = devm_clk_bulk_get(dev, ctrl->num_clk, ctrl->clocks);
-	if (rc) {
-		DRM_ERROR("failed to get %s clk. err=%d\n",
-			dp_parser_pm_name(DP_CTRL_PM), rc);
+	if (rc)
 		return -ENODEV;
-	}
 
 	rc = devm_clk_bulk_get(dev, stream->num_clk, stream->clocks);
-	if (rc) {
-		DRM_ERROR("failed to get %s clk. err=%d\n",
-			dp_parser_pm_name(DP_CTRL_PM), rc);
+	if (rc)
 		return -ENODEV;
-	}
 
 	return 0;
 }
@@ -121,11 +112,9 @@ int dp_power_clk_enable(struct dp_power *dp_power,
 			mp = &power->parser->mp[DP_CORE_PM];
 
 			rc = clk_bulk_prepare_enable(mp->num_clk, mp->clocks);
-			if (rc) {
-				DRM_ERROR("fail to enable clks: %s. err=%d\n",
-					dp_parser_pm_name(DP_CORE_PM), rc);
+			if (rc)
 				return rc;
-			}
+
 			dp_power->core_clks_on = true;
 		}
 	}
@@ -133,10 +122,8 @@ int dp_power_clk_enable(struct dp_power *dp_power,
 	mp = &power->parser->mp[pm_type];
 	if (enable) {
 		rc = clk_bulk_prepare_enable(mp->num_clk, mp->clocks);
-		if (rc) {
-			DRM_ERROR("failed to enable clks, err: %d\n", rc);
+		if (rc)
 			return rc;
-		}
 	} else {
 		clk_bulk_disable_unprepare(mp->num_clk, mp->clocks);
 	}
@@ -162,34 +149,19 @@ int dp_power_clk_enable(struct dp_power *dp_power,
 
 int dp_power_client_init(struct dp_power *dp_power)
 {
-	int rc = 0;
 	struct dp_power_private *power;
 
-	if (!dp_power) {
-		DRM_ERROR("invalid power data\n");
-		return -EINVAL;
-	}
-
 	power = container_of(dp_power, struct dp_power_private, dp_power);
 
 	pm_runtime_enable(&power->pdev->dev);
 
-	rc = dp_power_clk_init(power);
-	if (rc)
-		DRM_ERROR("failed to init clocks %d\n", rc);
-
-	return rc;
+	return dp_power_clk_init(power);
 }
 
 void dp_power_client_deinit(struct dp_power *dp_power)
 {
 	struct dp_power_private *power;
 
-	if (!dp_power) {
-		DRM_ERROR("invalid power data\n");
-		return;
-	}
-
 	power = container_of(dp_power, struct dp_power_private, dp_power);
 
 	pm_runtime_disable(&power->pdev->dev);
@@ -200,25 +172,14 @@ int dp_power_init(struct dp_power *dp_power)
 	int rc = 0;
 	struct dp_power_private *power = NULL;
 
-	if (!dp_power) {
-		DRM_ERROR("invalid power data\n");
-		return -EINVAL;
-	}
-
 	power = container_of(dp_power, struct dp_power_private, dp_power);
 
 	pm_runtime_get_sync(&power->pdev->dev);
 
 	rc = dp_power_clk_enable(dp_power, DP_CORE_PM, true);
-	if (rc) {
-		DRM_ERROR("failed to enable DP core clocks, %d\n", rc);
-		goto exit;
-	}
-
-	return 0;
-
-exit:
+	if (rc)
 		pm_runtime_put_sync(&power->pdev->dev);
+
 	return rc;
 }
 
@@ -238,11 +199,6 @@ struct dp_power *dp_power_get(struct device *dev, struct dp_parser *parser)
 	struct dp_power_private *power;
 	struct dp_power *dp_power;
 
-	if (!parser) {
-		DRM_ERROR("invalid input\n");
-		return ERR_PTR(-EINVAL);
-	}
-
 	power = devm_kzalloc(&parser->pdev->dev, sizeof(*power), GFP_KERNEL);
 	if (!power)
 		return ERR_PTR(-ENOMEM);