[PATCH v2 01/26] drm/bridge: allow optionally specifying an owner .odev device

[Peter Rosin <peda-koto5C5qi+TLoDKTGw+V6w@public.gmane.org>]

Bridge drivers can now (temporarily, in a transition phase) select if
they want to provide a full owner device or keep just providing an
of_node.

By providing a full owner device, the bridge drivers no longer need
to provide an of_node since that node is available via the owner
device.

When all bridge drivers provide an owner device, that will become
mandatory and the .of_node member will be removed.

Signed-off-by: Peter Rosin <peda@axentia.se>
---
 drivers/gpu/drm/drm_bridge.c             | 3 ++-
 drivers/gpu/drm/rockchip/rockchip_lvds.c | 4 +++-
 include/drm/drm_bridge.h                 | 2 ++
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 1638bfe9627c..3872f5379998 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -365,7 +365,8 @@ struct drm_bridge *of_drm_find_bridge(struct device_node *np)
 	mutex_lock(&bridge_lock);
 
 	list_for_each_entry(bridge, &bridge_list, list) {
-		if (bridge->of_node == np) {
+		if ((bridge->odev && bridge->odev->of_node == np) ||
+		    bridge->of_node == np) {
 			mutex_unlock(&bridge_lock);
 			return bridge;
 		}
diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.c b/drivers/gpu/drm/rockchip/rockchip_lvds.c
index 4bd94b167d2c..557e0079c98d 100644
--- a/drivers/gpu/drm/rockchip/rockchip_lvds.c
+++ b/drivers/gpu/drm/rockchip/rockchip_lvds.c
@@ -377,8 +377,10 @@ static int rockchip_lvds_bind(struct device *dev, struct device *master,
 	}
 	if (lvds->panel)
 		remote = lvds->panel->dev->of_node;
-	else
+	else if (lvds->bridge->of_node)
 		remote = lvds->bridge->of_node;
+	else
+		remote = lvds->bridge->odev->of_node;
 	if (of_property_read_string(dev->of_node, "rockchip,output", &name))
 		/* default set it as output rgb */
 		lvds->output = DISPLAY_OUTPUT_RGB;
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 3270fec46979..7c17977c3537 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -254,6 +254,7 @@ struct drm_bridge_timings {
 
 /**
  * struct drm_bridge - central DRM bridge control structure
+ * @odev: device that owns the bridge
  * @dev: DRM device this bridge belongs to
  * @encoder: encoder to which this bridge is connected
  * @next: the next bridge in the encoder chain
@@ -265,6 +266,7 @@ struct drm_bridge_timings {
  * @driver_private: pointer to the bridge driver's internal context
  */
 struct drm_bridge {
+	struct device *odev;
 	struct drm_device *dev;
 	struct drm_encoder *encoder;
 	struct drm_bridge *next;
-- 
2.11.0

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