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Subject[PATCH] usb: typec: tcpm: Export partner Source Capabilities
From
Provide a function to get the partner Source Capabilities.

Signed-off-by: Kyle Tso <kyletso@google.com>
---
drivers/usb/typec/tcpm/tcpm.c | 23 +++++++++++++++++++++++
include/linux/usb/tcpm.h | 1 +
2 files changed, 24 insertions(+)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index f1d3e54210df..29cd84ba9960 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4494,6 +4494,29 @@ int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
}
EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities);

+/*
+ * Don't call this function in interrupt context. Caller needs to free the
+ * memory itself.
+ */
+int tcpm_get_partner_src_caps(struct tcpm_port *port, u32 **src_pdo)
+{
+ unsigned int nr_pdo;
+
+ if (port->nr_source_caps == 0)
+ return -ENODATA;
+
+ *src_pdo = kcalloc(port->nr_source_caps, sizeof(u32), GFP_KERNEL);
+ if (!src_pdo)
+ return -ENOMEM;
+
+ mutex_lock(&port->lock);
+ nr_pdo = tcpm_copy_pdos(*src_pdo, port->source_caps,
+ port->nr_source_caps);
+ mutex_unlock(&port->lock);
+ return nr_pdo;
+}
+EXPORT_SYMBOL_GPL(tcpm_get_partner_src_caps);
+
/* Power Supply access to expose source power information */
enum tcpm_psy_online_states {
TCPM_PSY_OFFLINE = 0,
diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
index 50c74a77db55..fe56d759567c 100644
--- a/include/linux/usb/tcpm.h
+++ b/include/linux/usb/tcpm.h
@@ -173,5 +173,6 @@ void tcpm_pd_transmit_complete(struct tcpm_port *port,
enum tcpm_transmit_status status);
void tcpm_pd_hard_reset(struct tcpm_port *port);
void tcpm_tcpc_reset(struct tcpm_port *port);
+int tcpm_get_partner_src_caps(struct tcpm_port *port, u32 **pdo);

#endif /* __LINUX_USB_TCPM_H */
--
2.20.1.495.gaa96b0ce6b-goog
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