audio ok

hc

2023-12-11 223293205a7265c8b02882461ba8996650048ade

 kernel/include/linux/rpmsg.h
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@@ -2,6 +2,7 @@
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 /*
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  * Remote processor messaging
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  *
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+ * Copyright (c) 2020 The Linux Foundation.
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  * Copyright (C) 2011 Texas Instruments, Inc.
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  * Copyright (C) 2011 Google, Inc.
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  * All rights reserved.
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@@ -60,6 +61,7 @@
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 };
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 typedef int (*rpmsg_rx_cb_t)(struct rpmsg_device *, void *, int, void *, u32);
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+typedef int (*rpmsg_rx_sig_t)(struct rpmsg_device *, void *, u32, u32);
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 /**
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  * struct rpmsg_endpoint - binds a local rpmsg address to its user
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@@ -67,6 +69,7 @@
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  * @refcount: when this drops to zero, the ept is deallocated
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  * @cb: rx callback handler
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  * @cb_lock: must be taken before accessing/changing @cb
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+ * @sig_cb: rx serial signal handler
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  * @addr: local rpmsg address
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  * @priv: private data for the driver's use
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  *
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@@ -89,6 +92,7 @@
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 	struct kref refcount;
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 	rpmsg_rx_cb_t cb;
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 	struct mutex cb_lock;
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+	rpmsg_rx_sig_t sig_cb;
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 	u32 addr;
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 	void *priv;
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@@ -102,6 +106,7 @@
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  * @probe: invoked when a matching rpmsg channel (i.e. device) is found
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  * @remove: invoked when the rpmsg channel is removed
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  * @callback: invoked when an inbound message is received on the channel
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+ * @signals: invoked when a serial signal change is received on the channel
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  */
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 struct rpmsg_driver {
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 	struct device_driver drv;
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@@ -109,6 +114,8 @@
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 	int (*probe)(struct rpmsg_device *dev);
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 	void (*remove)(struct rpmsg_device *dev);
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 	int (*callback)(struct rpmsg_device *, void *, int, void *, u32);
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+	int (*signals)(struct rpmsg_device *rpdev,
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+		       void *priv, u32 old, u32 new);
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 };
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 #if IS_ENABLED(CONFIG_RPMSG)
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@@ -134,6 +141,9 @@
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 __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, struct file *filp,
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 			poll_table *wait);
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+
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+int rpmsg_get_signals(struct rpmsg_endpoint *ept);
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+int rpmsg_set_signals(struct rpmsg_endpoint *ept, u32 set, u32 clear);
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 #else
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@@ -242,6 +252,23 @@
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 	return 0;
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 }
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+static inline int rpmsg_get_signals(struct rpmsg_endpoint *ept)
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+{
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+	/* This shouldn't be possible */
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+	WARN_ON(1);
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+
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+	return -ENXIO;
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+}
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+
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+static inline int rpmsg_set_signals(struct rpmsg_endpoint *ept,
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+				    u32 set, u32 clear)
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+{
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+	/* This shouldn't be possible */
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+	WARN_ON(1);
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+
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+	return -ENXIO;
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+}
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+
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 #endif /* IS_ENABLED(CONFIG_RPMSG) */
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 /* use a macro to avoid include chaining to get THIS_MODULE */