[PATCH v13 04/18] drm: exynos: dsi: Switch to DSI panel or bridge find helper

[Jagan Teki]

drm_of_dsi_find_panel_or_bridge is capable of looking up the
downstream DSI bridge and panel and trying to add a panel bridge
if the panel is found.

Replace explicit finding calls with drm_of_dsi_find_panel_or_bridge
followed with drmm_panel_bridge_add.

Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
Changes for v13, v12, v11:
- none
Changes for v10:
- new patch

 drivers/gpu/drm/exynos/exynos_drm_dsi.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index df15501b1075..12a6dd987e8f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -25,6 +25,7 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
@@ -1470,24 +1471,26 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
 	struct device *dev = dsi->dev;
 	struct drm_encoder *encoder = &dsi->encoder;
 	struct drm_device *drm = encoder->dev;
+	struct drm_bridge *bridge;
 	struct drm_panel *panel;
 	int ret;
 
-	panel = of_drm_find_panel(device->dev.of_node);
-	if (!IS_ERR(panel)) {
-		dsi->out_bridge = devm_drm_panel_bridge_add(dev, panel);
-	} else {
-		dsi->out_bridge = of_drm_find_bridge(device->dev.of_node);
-		if (!dsi->out_bridge)
-			dsi->out_bridge = ERR_PTR(-EINVAL);
-	}
+	ret = drm_of_dsi_find_panel_or_bridge(dev->of_node, 1, 0,
+					      &panel, &bridge);
+	if (ret)
+		return ret;
 
-	if (IS_ERR(dsi->out_bridge)) {
-		ret = PTR_ERR(dsi->out_bridge);
+	if (panel)
+		bridge = drmm_panel_bridge_add(NULL, panel);
+
+	if (IS_ERR(bridge)) {
+		ret = PTR_ERR(bridge);
 		DRM_DEV_ERROR(dev, "failed to find the bridge: %d\n", ret);
 		return ret;
 	}
 
+	dsi->out_bridge = bridge;
+
 	DRM_DEV_INFO(dev, "Attached %s device\n", device->name);
 
 	drm_bridge_add(&dsi->bridge);
@@ -1531,8 +1534,6 @@ static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
 	struct exynos_dsi *dsi = host_to_dsi(host);
 	struct drm_device *drm = dsi->encoder.dev;
 
-	dsi->out_bridge = NULL;
-
 	if (drm->mode_config.poll_enabled)
 		drm_kms_helper_hotplug_event(drm);
 
-- 
2.25.1