drm/bridge: Centralize error message when bridge attach fails

Being informed of a failure to attach a bridge is useful, and many
drivers prints an error message in that case. Move the message to
drm_bridge_attach() to avoid code duplication.
Suggested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Jyri Sarha <jyri.sarha@iki.fi>

drivers/gpu/drm/bridge/analogix/analogix_dp_core.c

@@ -1583,7 +1583,6 @@ static int analogix_dp_create_bridge(struct drm_device *drm_dev,
 				     struct analogix_dp_device *dp)
 {
 	struct drm_bridge *bridge;
-	int ret;
 
 	bridge = devm_kzalloc(drm_dev->dev, sizeof(*bridge), GFP_KERNEL);
 	if (!bridge) {
@@ -1596,13 +1595,7 @@ static int analogix_dp_create_bridge(struct drm_device *drm_dev,
 	bridge->driver_private = dp;
 	bridge->funcs = &analogix_dp_bridge_funcs;
 
-	ret = drm_bridge_attach(dp->encoder, bridge, NULL, 0);
-	if (ret) {
-		DRM_ERROR("failed to attach drm bridge\n");
-		return -EINVAL;
-	}
-
-	return 0;
+	return drm_bridge_attach(dp->encoder, bridge, NULL, 0);
 }
 
 static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp)

drivers/gpu/drm/bridge/analogix/anx7625.c

@@ -1359,12 +1359,9 @@ static int anx7625_bridge_attach(struct drm_bridge *bridge,
 		err = drm_bridge_attach(bridge->encoder,
 					ctx->pdata.panel_bridge,
 					&ctx->bridge, flags);
-		if (err) {
-			DRM_DEV_ERROR(dev,
-				      "Fail to attach panel bridge: %d\n", err);
+		if (err)
 			return err;
 	}
-	}
 
 	ctx->bridge_attached = 1;
 

drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

@@ -3474,7 +3474,6 @@ struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
 	ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL, 0);
 	if (ret) {
 		dw_hdmi_remove(hdmi);
-		DRM_ERROR("Failed to initialize bridge with drm\n");
 		return ERR_PTR(ret);
 	}
 

drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c

@@ -1229,15 +1229,7 @@ EXPORT_SYMBOL_GPL(dw_mipi_dsi_remove);
  */
 int dw_mipi_dsi_bind(struct dw_mipi_dsi *dsi, struct drm_encoder *encoder)
 {
-	int ret;
-
-	ret = drm_bridge_attach(encoder, &dsi->bridge, NULL, 0);
-	if (ret) {
-		DRM_ERROR("Failed to initialize bridge with drm\n");
-		return ret;
-	}
-
-	return ret;
+	return drm_bridge_attach(encoder, &dsi->bridge, NULL, 0);
 }
 EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind);
 

drivers/gpu/drm/drm_bridge.c

@@ -28,6 +28,7 @@
 #include <drm/drm_atomic_state_helper.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_encoder.h>
+#include <drm/drm_print.h>
 
 #include "drm_crtc_internal.h"
 
@@ -225,6 +226,15 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
 	bridge->dev = NULL;
 	bridge->encoder = NULL;
 	list_del(&bridge->chain_node);
+
+#ifdef CONFIG_OF
+	DRM_ERROR("failed to attach bridge %pOF to encoder %s: %d\n",
+		  bridge->of_node, encoder->name, ret);
+#else
+	DRM_ERROR("failed to attach bridge to encoder %s: %d\n",
+		  encoder->name, ret);
+#endif
+
 	return ret;
 }
 EXPORT_SYMBOL(drm_bridge_attach);

drivers/gpu/drm/exynos/exynos_dp.c

@@ -109,12 +109,9 @@ static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
 	if (dp->ptn_bridge) {
 		ret = drm_bridge_attach(&dp->encoder, dp->ptn_bridge, bridge,
 					0);
-		if (ret) {
-			DRM_DEV_ERROR(dp->dev,
-				      "Failed to attach bridge to drm\n");
+		if (ret)
 			return ret;
 	}
-	}
 
 	return 0;
 }

drivers/gpu/drm/exynos/exynos_hdmi.c

@@ -970,11 +970,8 @@ static int hdmi_create_connector(struct drm_encoder *encoder)
 	drm_connector_helper_add(connector, &hdmi_connector_helper_funcs);
 	drm_connector_attach_encoder(connector, encoder);
 
-	if (hdata->bridge) {
+	if (hdata->bridge)
 		ret = drm_bridge_attach(encoder, hdata->bridge, NULL, 0);
-		if (ret)
-			DRM_DEV_ERROR(hdata->dev, "Failed to attach bridge\n");
-	}
 
 	cec_fill_conn_info_from_drm(&conn_info, connector);
 

drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c

@@ -769,16 +769,9 @@ static int dsi_bridge_init(struct drm_device *dev, struct dw_dsi *dsi)
 {
 	struct drm_encoder *encoder = &dsi->encoder;
 	struct drm_bridge *bridge = dsi->bridge;
-	int ret;
 
 	/* associate the bridge to dsi encoder */
-	ret = drm_bridge_attach(encoder, bridge, NULL, 0);
-	if (ret) {
-		DRM_ERROR("failed to attach external bridge\n");
-		return ret;
-	}
-
-	return 0;
+	return drm_bridge_attach(encoder, bridge, NULL, 0);
 }
 
 static int dsi_bind(struct device *dev, struct device *master, void *data)

drivers/gpu/drm/imx/dcss/dcss-kms.c

@@ -93,11 +93,8 @@ static int dcss_kms_bridge_connector_init(struct dcss_kms_dev *kms)
 
 	ret = drm_bridge_attach(encoder, bridge, NULL,
 				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
-	if (ret < 0) {
-		dev_err(ddev->dev, "Unable to attach bridge %pOF\n",
-			bridge->of_node);
+	if (ret < 0)
 		return ret;
-	}
 
 	kms->connector = drm_bridge_connector_init(ddev, encoder);
 	if (IS_ERR(kms->connector)) {

drivers/gpu/drm/imx/imx-ldb.c

@@ -465,10 +465,8 @@ static int imx_ldb_register(struct drm_device *drm,
 
 	if (imx_ldb_ch->bridge) {
 		ret = drm_bridge_attach(encoder, imx_ldb_ch->bridge, NULL, 0);
-		if (ret) {
-			DRM_ERROR("Failed to initialize bridge with drm\n");
+		if (ret)
 			return ret;
-		}
 	} else {
 		/*
 		 * We want to add the connector whenever there is no bridge

drivers/gpu/drm/imx/parallel-display.c

@@ -294,11 +294,8 @@ static int imx_pd_bind(struct device *dev, struct device *master, void *data)
 
 	if (imxpd->next_bridge) {
 		ret = drm_bridge_attach(encoder, imxpd->next_bridge, bridge, 0);
-		if (ret < 0) {
-			dev_err(imxpd->dev, "failed to attach bridge: %d\n",
-				ret);
+		if (ret < 0)
 			return ret;
-		}
 	} else {
 		drm_connector_helper_add(connector,
 					 &imx_pd_connector_helper_funcs);

drivers/gpu/drm/ingenic/ingenic-drm-drv.c

@@ -1081,11 +1081,9 @@ static int ingenic_drm_bind(struct device *dev, bool has_components)
 		drm_encoder_helper_add(encoder, &ingenic_drm_encoder_helper_funcs);
 
 		ret = drm_bridge_attach(encoder, bridge, NULL, 0);
-		if (ret) {
-			dev_err(dev, "Unable to attach bridge\n");
+		if (ret)
 			return ret;
 	}
-	}
 
 	drm_for_each_encoder(encoder, drm) {
 		clone_mask |= BIT(drm_encoder_index(encoder));

drivers/gpu/drm/kmb/kmb_dsi.c

@@ -1441,7 +1441,6 @@ int kmb_dsi_encoder_init(struct drm_device *dev, struct kmb_dsi *kmb_dsi)
 	ret = drm_bridge_attach(encoder, adv_bridge, NULL,
 				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 	if (ret) {
-		DRM_ERROR("failed to attach bridge to MIPI\n");
 		drm_encoder_cleanup(encoder);
 		return ret;
 	}

drivers/gpu/drm/mcde/mcde_dsi.c

@@ -1052,7 +1052,6 @@ static int mcde_dsi_bridge_attach(struct drm_bridge *bridge,
 {
 	struct mcde_dsi *d = bridge_to_mcde_dsi(bridge);
 	struct drm_device *drm = bridge->dev;
-	int ret;
 
 	if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
 		dev_err(d->dev, "we need atomic updates\n");
@@ -1060,13 +1059,7 @@ static int mcde_dsi_bridge_attach(struct drm_bridge *bridge,
 	}
 
 	/* Attach the DSI bridge to the output (panel etc) bridge */
-	ret = drm_bridge_attach(bridge->encoder, d->bridge_out, bridge, flags);
-	if (ret) {
-		dev_err(d->dev, "failed to attach the DSI bridge\n");
-		return ret;
-	}
-
-	return 0;
+	return drm_bridge_attach(bridge->encoder, d->bridge_out, bridge, flags);
 }
 
 static const struct drm_bridge_funcs mcde_dsi_bridge_funcs = {

drivers/gpu/drm/mediatek/mtk_dpi.c

@@ -714,10 +714,8 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
 
 	ret = drm_bridge_attach(&dpi->encoder, &dpi->bridge, NULL,
 				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
-	if (ret) {
-		dev_err(dev, "Failed to attach bridge: %d\n", ret);
+	if (ret)
 		goto err_cleanup;
-	}
 
 	dpi->connector = drm_bridge_connector_init(drm_dev, &dpi->encoder);
 	if (IS_ERR(dpi->connector)) {

drivers/gpu/drm/mediatek/mtk_hdmi.c

@@ -1293,12 +1293,9 @@ static int mtk_hdmi_bridge_attach(struct drm_bridge *bridge,
 	if (hdmi->next_bridge) {
 		ret = drm_bridge_attach(bridge->encoder, hdmi->next_bridge,
 					bridge, flags);
-		if (ret) {
-			dev_err(hdmi->dev,
-				"Failed to attach external bridge: %d\n", ret);
+		if (ret)
 			return ret;
 	}
-	}
 
 	mtk_cec_set_hpd_event(hdmi->cec_dev, mtk_hdmi_hpd_event, hdmi->dev);
 

drivers/gpu/drm/omapdrm/omap_drv.c

@@ -290,13 +290,9 @@ static int omap_modeset_init(struct drm_device *dev)
 			ret = drm_bridge_attach(pipe->encoder,
 						pipe->output->bridge, NULL,
 						DRM_BRIDGE_ATTACH_NO_CONNECTOR);
-			if (ret < 0) {
-				dev_err(priv->dev,
-					"unable to attach bridge %pOF\n",
-					pipe->output->bridge->of_node);
+			if (ret < 0)
 				return ret;
 		}
-		}
 
 		id = omap_display_id(pipe->output);
 		pipe->alias_id = id >= 0 ? id : i;

drivers/gpu/drm/rockchip/rockchip_lvds.c

@@ -636,12 +636,9 @@ static int rockchip_lvds_bind(struct device *dev, struct device *master,
 		}
 	} else {
 		ret = drm_bridge_attach(encoder, lvds->bridge, NULL, 0);
-		if (ret) {
-			DRM_DEV_ERROR(drm_dev->dev,
-				      "failed to attach bridge: %d\n", ret);
+		if (ret)
 			goto err_free_encoder;
 	}
-	}
 
 	pm_runtime_enable(dev);
 	of_node_put(remote);

drivers/gpu/drm/rockchip/rockchip_rgb.c

@@ -143,11 +143,8 @@ struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
 	rgb->bridge = bridge;
 
 	ret = drm_bridge_attach(encoder, rgb->bridge, NULL, 0);
-	if (ret) {
-		DRM_DEV_ERROR(drm_dev->dev,
-			      "failed to attach bridge: %d\n", ret);
+	if (ret)
 		goto err_free_encoder;
-	}
 
 	return rgb;
 

drivers/gpu/drm/sti/sti_dvo.c

@@ -463,10 +463,8 @@ static int sti_dvo_bind(struct device *dev, struct device *master, void *data)
 	drm_bridge_add(bridge);
 
 	err = drm_bridge_attach(encoder, bridge, NULL, 0);
-	if (err) {
-		DRM_ERROR("Failed to attach bridge\n");
+	if (err)
 		return err;
-	}
 
 	dvo->bridge = bridge;
 	connector->encoder = encoder;

drivers/gpu/drm/sun4i/sun4i_lvds.c

@@ -142,11 +142,9 @@ int sun4i_lvds_init(struct drm_device *drm, struct sun4i_tcon *tcon)
 
 	if (bridge) {
 		ret = drm_bridge_attach(encoder, bridge, NULL, 0);
-		if (ret) {
-			dev_err(drm->dev, "Couldn't attach our bridge\n");
+		if (ret)
 			goto err_cleanup_connector;
 	}
-	}
 
 	return 0;
 

drivers/gpu/drm/sun4i/sun4i_rgb.c

@@ -234,11 +234,9 @@ int sun4i_rgb_init(struct drm_device *drm, struct sun4i_tcon *tcon)
 
 	if (rgb->bridge) {
 		ret = drm_bridge_attach(encoder, rgb->bridge, NULL, 0);
-		if (ret) {
-			dev_err(drm->dev, "Couldn't attach our bridge\n");
+		if (ret)
 			goto err_cleanup_connector;
 	}
-	}
 
 	return 0;
 

drivers/gpu/drm/tegra/rgb.c

@@ -275,11 +275,8 @@ int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc)
 	if (output->bridge) {
 		err = drm_bridge_attach(&output->encoder, output->bridge,
 					NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
-		if (err) {
-			dev_err(output->dev, "failed to attach bridge: %d\n",
-				err);
+		if (err)
 			return err;
-		}
 
 		connector = drm_bridge_connector_init(drm, &output->encoder);
 		if (IS_ERR(connector)) {

drivers/gpu/drm/tidss/tidss_kms.c

@@ -227,11 +227,9 @@ static int tidss_dispc_modeset_init(struct tidss_device *tidss)
 		}
 
 		ret = drm_bridge_attach(enc, pipes[i].bridge, NULL, 0);
-		if (ret) {
-			dev_err(tidss->dev, "bridge attach failed: %d\n", ret);
+		if (ret)
 			return ret;
 	}
-	}
 
 	/* create overlay planes of the leftover planes */
 

drivers/gpu/drm/tilcdc/tilcdc_external.c

@@ -93,10 +93,8 @@ int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge)
 	priv->external_encoder->possible_crtcs = BIT(0);
 
 	ret = drm_bridge_attach(priv->external_encoder, bridge, NULL, 0);
-	if (ret) {
-		dev_err(ddev->dev, "drm_bridge_attach() failed %d\n", ret);
+	if (ret)
 		return ret;
-	}
 
 	tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_default);
 

drivers/gpu/drm/vc4/vc4_dsi.c

@@ -1646,10 +1646,8 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
 	drm_encoder_helper_add(dsi->encoder, &vc4_dsi_encoder_helper_funcs);
 
 	ret = drm_bridge_attach(dsi->encoder, dsi->bridge, NULL, 0);
-	if (ret) {
-		dev_err(dev, "bridge attach failed: %d\n", ret);
+	if (ret)
 		return ret;
-	}
 	/* Disable the atomic helper calls into the bridge.  We
 	 * manually call the bridge pre_enable / enable / etc. calls
 	 * from our driver, since we need to sequence them within the