[RFC PATCH 04/17] drm/exynos: dsi: Create bridge connector for encoder

[Jagan Teki]

Use drm_bridge_connector_init to create a connector
for display pipelines that use drm_bridge for encoder
implementation.

This allows splitting connector operations across
multiple bridges when necessary, instead of having
the last bridge in the chain creating the connector
and handling all connector operations internally.

Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 drivers/gpu/drm/exynos/exynos_drm_dsi.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 24f0b082ac6d..d828be07c325 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -24,6 +24,7 @@
 #include <video/videomode.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge_connector.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_mipi_dsi.h>
@@ -1591,6 +1592,7 @@ static int exynos_dsi_bind(struct device *dev, struct device *master,
 	struct drm_device *drm_dev = data;
 	struct device_node *in_bridge_node;
 	struct drm_bridge *in_bridge;
+	struct drm_connector *connector;
 	int ret;
 
 	drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
@@ -1599,12 +1601,22 @@ static int exynos_dsi_bind(struct device *dev, struct device *master,
 	if (ret < 0)
 		return ret;
 
-	ret = drm_bridge_attach(&dsi->encoder, &dsi->bridge, NULL, 0);
+	ret = drm_bridge_attach(&dsi->encoder, &dsi->bridge, NULL,
+				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 	if (ret) {
 		drm_encoder_cleanup(&dsi->encoder);
 		return ret;
 	}
 
+	connector = drm_bridge_connector_init(drm_dev, &dsi->encoder);
+	if (IS_ERR(connector)) {
+		DRM_DEV_ERROR(dsi->dev, "Unable to create bridge connector\n");
+		drm_encoder_cleanup(&dsi->encoder);
+		return PTR_ERR(connector);
+	}
+
+	drm_connector_attach_encoder(connector, &dsi->encoder);
+
 	in_bridge_node = of_graph_get_remote_node(dev->of_node, DSI_PORT_IN, 0);
 	if (in_bridge_node) {
 		in_bridge = of_drm_find_bridge(in_bridge_node);
-- 
2.25.1