drm/stm: dsi: Avoid printing errors for -EPROBE_DEFER

Don't print error when probe deferred error is returned.
Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Signed-off-by: Yannick Fertre <yannick.fertre@foss.st.com>
Tested-by: Yannick Fertre <yannick.fertre@foss.st.com>
Signed-off-by: Philippe Cornu <philippe.cornu@foss.st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210222092205.32086-2-raphael.gallais-pou@foss.st.com

drivers/gpu/drm/stm/dw_mipi_dsi-stm.c

@@ -363,8 +363,7 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
 	dsi->vdd_supply = devm_regulator_get(dev, "phy-dsi");
 	if (IS_ERR(dsi->vdd_supply)) {
 		ret = PTR_ERR(dsi->vdd_supply);
-		if (ret != -EPROBE_DEFER)
-			DRM_ERROR("Failed to request regulator: %d\n", ret);
+		dev_err_probe(dev, ret, "Failed to request regulator\n");
 		return ret;
 	}
 
@@ -377,9 +376,7 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
 	dsi->pllref_clk = devm_clk_get(dev, "ref");
 	if (IS_ERR(dsi->pllref_clk)) {
 		ret = PTR_ERR(dsi->pllref_clk);
-		if (ret != -EPROBE_DEFER)
-			DRM_ERROR("Unable to get pll reference clock: %d\n",
-				  ret);
+		dev_err_probe(dev, ret, "Unable to get pll reference clock\n");
 		goto err_clk_get;
 	}
 
@@ -419,7 +416,7 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
 	dsi->dsi = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
 	if (IS_ERR(dsi->dsi)) {
 		ret = PTR_ERR(dsi->dsi);
-		DRM_ERROR("Failed to initialize mipi dsi host: %d\n", ret);
+		dev_err_probe(dev, ret, "Failed to initialize mipi dsi host\n");
 		goto err_dsi_probe;
 	}