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path: root/drivers/gpu/drm/drm_bridge.c
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Diffstat (limited to 'drivers/gpu/drm/drm_bridge.c')
-rw-r--r--drivers/gpu/drm/drm_bridge.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 138b2711d389..cba537c99e43 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -352,6 +352,116 @@ void drm_bridge_enable(struct drm_bridge *bridge)
}
EXPORT_SYMBOL(drm_bridge_enable);
+/**
+ * drm_atomic_bridge_disable - disables all bridges in the encoder chain
+ * @bridge: bridge control structure
+ * @state: atomic state being committed
+ *
+ * Calls &drm_bridge_funcs.atomic_disable (falls back on
+ * &drm_bridge_funcs.disable) op for all the bridges in the encoder chain,
+ * starting from the last bridge to the first. These are called before calling
+ * &drm_encoder_helper_funcs.atomic_disable
+ *
+ * Note: the bridge passed should be the one closest to the encoder
+ */
+void drm_atomic_bridge_disable(struct drm_bridge *bridge,
+ struct drm_atomic_state *state)
+{
+ if (!bridge)
+ return;
+
+ drm_atomic_bridge_disable(bridge->next, state);
+
+ if (bridge->funcs->atomic_disable)
+ bridge->funcs->atomic_disable(bridge, state);
+ else if (bridge->funcs->disable)
+ bridge->funcs->disable(bridge);
+}
+EXPORT_SYMBOL(drm_atomic_bridge_disable);
+
+/**
+ * drm_atomic_bridge_post_disable - cleans up after disabling all bridges in the
+ * encoder chain
+ * @bridge: bridge control structure
+ * @state: atomic state being committed
+ *
+ * Calls &drm_bridge_funcs.atomic_post_disable (falls back on
+ * &drm_bridge_funcs.post_disable) op for all the bridges in the encoder chain,
+ * starting from the first bridge to the last. These are called after completing
+ * &drm_encoder_helper_funcs.atomic_disable
+ *
+ * Note: the bridge passed should be the one closest to the encoder
+ */
+void drm_atomic_bridge_post_disable(struct drm_bridge *bridge,
+ struct drm_atomic_state *state)
+{
+ if (!bridge)
+ return;
+
+ if (bridge->funcs->atomic_post_disable)
+ bridge->funcs->atomic_post_disable(bridge, state);
+ else if (bridge->funcs->post_disable)
+ bridge->funcs->post_disable(bridge);
+
+ drm_atomic_bridge_post_disable(bridge->next, state);
+}
+EXPORT_SYMBOL(drm_atomic_bridge_post_disable);
+
+/**
+ * drm_atomic_bridge_pre_enable - prepares for enabling all bridges in the
+ * encoder chain
+ * @bridge: bridge control structure
+ * @state: atomic state being committed
+ *
+ * Calls &drm_bridge_funcs.atomic_pre_enable (falls back on
+ * &drm_bridge_funcs.pre_enable) op for all the bridges in the encoder chain,
+ * starting from the last bridge to the first. These are called before calling
+ * &drm_encoder_helper_funcs.atomic_enable
+ *
+ * Note: the bridge passed should be the one closest to the encoder
+ */
+void drm_atomic_bridge_pre_enable(struct drm_bridge *bridge,
+ struct drm_atomic_state *state)
+{
+ if (!bridge)
+ return;
+
+ drm_atomic_bridge_pre_enable(bridge->next, state);
+
+ if (bridge->funcs->atomic_pre_enable)
+ bridge->funcs->atomic_pre_enable(bridge, state);
+ else if (bridge->funcs->pre_enable)
+ bridge->funcs->pre_enable(bridge);
+}
+EXPORT_SYMBOL(drm_atomic_bridge_pre_enable);
+
+/**
+ * drm_atomic_bridge_enable - enables all bridges in the encoder chain
+ * @bridge: bridge control structure
+ * @state: atomic state being committed
+ *
+ * Calls &drm_bridge_funcs.atomic_enable (falls back on
+ * &drm_bridge_funcs.enable) op for all the bridges in the encoder chain,
+ * starting from the first bridge to the last. These are called after completing
+ * &drm_encoder_helper_funcs.atomic_enable
+ *
+ * Note: the bridge passed should be the one closest to the encoder
+ */
+void drm_atomic_bridge_enable(struct drm_bridge *bridge,
+ struct drm_atomic_state *state)
+{
+ if (!bridge)
+ return;
+
+ if (bridge->funcs->atomic_enable)
+ bridge->funcs->atomic_enable(bridge, state);
+ else if (bridge->funcs->enable)
+ bridge->funcs->enable(bridge);
+
+ drm_atomic_bridge_enable(bridge->next, state);
+}
+EXPORT_SYMBOL(drm_atomic_bridge_enable);
+
#ifdef CONFIG_OF
/**
* of_drm_find_bridge - find the bridge corresponding to the device node in