linux-kernel - [PATCH 01/30] drm: Introduce drm_bridge

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Message-ID: <20191126131541.47393-2-mihail.atanassov@arm.com>
Date:   Tue, 26 Nov 2019 13:15:59 +0000
From:   Mihail Atanassov <Mihail.Atanassov@....com>
To:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
CC:     Mihail Atanassov <Mihail.Atanassov@....com>, nd <nd@....com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 01/30] drm: Introduce drm_bridge_init()

A simple convenience function to initialize the struct drm_bridge.

Signed-off-by: Mihail Atanassov <mihail.atanassov@....com>
---
 drivers/gpu/drm/drm_bridge.c | 29 +++++++++++++++++++++++++++++
 include/drm/drm_bridge.h     |  4 ++++
 2 files changed, 33 insertions(+)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index cba537c99e43..cbe680aa6eac 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -89,6 +89,35 @@ void drm_bridge_remove(struct drm_bridge *bridge)
 }
 EXPORT_SYMBOL(drm_bridge_remove);
 
+/**
+ * drm_bridge_init - initialise a drm_bridge structure
+ *
+ * @bridge: bridge control structure
+ * @funcs: control functions
+ * @dev: device
+ * @timings: timing specification for the bridge; optional (may be NULL)
+ * @driver_private: pointer to the bridge driver internal context (may be NULL)
+ */
+void drm_bridge_init(struct drm_bridge *bridge, struct device *dev,
+		     const struct drm_bridge_funcs *funcs,
+		     const struct drm_bridge_timings *timings,
+		     void *driver_private)
+{
+	WARN_ON(!funcs);
+
+	bridge->dev = NULL;
+	bridge->encoder = NULL;
+	bridge->next = NULL;
+
+#ifdef CONFIG_OF
+	bridge->of_node = dev->of_node;
+#endif
+	bridge->timings = timings;
+	bridge->funcs = funcs;
+	bridge->driver_private = driver_private;
+}
+EXPORT_SYMBOL(drm_bridge_init);
+
 /**
  * drm_bridge_attach - attach the bridge to an encoder's chain
  *
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index c0a2286a81e9..d6d9d5301551 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -402,6 +402,10 @@ struct drm_bridge {
 
 void drm_bridge_add(struct drm_bridge *bridge);
 void drm_bridge_remove(struct drm_bridge *bridge);
+void drm_bridge_init(struct drm_bridge *bridge, struct device *dev,
+		     const struct drm_bridge_funcs *funcs,
+		     const struct drm_bridge_timings *timings,
+		     void *driver_private);
 struct drm_bridge *of_drm_find_bridge(struct device_node *np);
 int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
 		      struct drm_bridge *previous);
-- 
2.23.0