From: "benjamin.gaignard@linaro.org" <benjamin.gaignard@linaro.org>
Date: Mon, 2 Oct 2017 11:34:45 +0200
Subject: drm/drm_of: add drm_of_panel_bridge_remove function
Git-commit: c70087e8f16f1dfe703d223aadd95ede1cde8e30
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
This function is the pendant of drm_of_find_panel_or_bridge()
to remove a previously allocated panel_bridge.
Given a specific port and endpoint it remove the panel bridge.
Since drm_panel_bridge_remove() will check that bridge parameter
is not NULL and is a real drm_panel_bridge and no a simple bridge
it is safe to call it directly.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
Tested-by: Philippe Cornu <philippe.cornu@st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1506936888-23844-3-git-send-email-benjamin.gaignard@linaro.org
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/drm_of.c | 33 +++++++++++++++++++++++++++++++++
include/drm/drm_of.h | 8 ++++++++
2 files changed, 41 insertions(+)
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -262,3 +262,36 @@ int drm_of_find_panel_or_bridge(const st
return ret;
}
EXPORT_SYMBOL_GPL(drm_of_find_panel_or_bridge);
+
+#ifdef CONFIG_DRM_PANEL_BRIDGE
+/*
+ * drm_of_panel_bridge_remove - remove panel bridge
+ * @np: device tree node containing panel bridge output ports
+ *
+ * Remove the panel bridge of a given DT node's port and endpoint number
+ *
+ * Returns zero if successful, or one of the standard error codes if it fails.
+ */
+int drm_of_panel_bridge_remove(const struct device_node *np,
+ int port, int endpoint)
+{
+ struct drm_bridge *bridge;
+ struct device_node *remote;
+
+ remote = of_graph_get_remote_node(np, port, endpoint);
+ if (!remote)
+ return -ENODEV;
+
+ bridge = of_drm_find_bridge(remote);
+ drm_panel_bridge_remove(bridge);
+
+ return 0;
+}
+#else
+int drm_of_panel_bridge_remove(const struct device_node *np,
+ int port, int endpoint)
+{
+ return -EINVAL;
+}
+#endif
+EXPORT_SYMBOL_GPL(drm_of_panel_bridge_remove);
--- a/include/drm/drm_of.h
+++ b/include/drm/drm_of.h
@@ -29,6 +29,8 @@ int drm_of_find_panel_or_bridge(const st
int port, int endpoint,
struct drm_panel **panel,
struct drm_bridge **bridge);
+int drm_of_panel_bridge_remove(const struct device_node *np,
+ int port, int endpoint);
#else
static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
struct device_node *port)
@@ -65,6 +67,12 @@ static inline int drm_of_find_panel_or_b
{
return -EINVAL;
}
+
+static inline int drm_of_panel_bridge_remove(const struct device_node *np,
+ int port, int endpoint)
+{
+ return -EINVAL;
+}
#endif
static inline int drm_of_encoder_active_endpoint_id(struct device_node *node,