[PATCH 06/15] mailbox: mediatek: Add cmdq_mbox_stop to disable GCE thread

[Jason-JH.Lin]

Add cmdq_mbox_stop to disable GCE thread.

To support the error handling or the stop flow of the GCE loopping
thread, lopping thread user can call cmdq_mbox_stop to disable the
GCE HW thread.

Signed-off-by: Jason-JH.Lin <jason-jh.lin at mediatek.com>
---
 drivers/mailbox/mtk-cmdq-mailbox.c       | 6 ++++++
 include/linux/mailbox/mtk-cmdq-mailbox.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index 4d62b07c1411..8bd39fecbf00 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -469,6 +469,12 @@ static void cmdq_mbox_shutdown(struct mbox_chan *chan)
 	spin_unlock_irqrestore(&thread->chan->lock, flags);
 }
 
+void cmdq_mbox_stop(struct mbox_chan *chan)
+{
+	cmdq_mbox_shutdown(chan);
+}
+EXPORT_SYMBOL(cmdq_mbox_stop);
+
 static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout)
 {
 	struct cmdq_thread *thread = (struct cmdq_thread *)chan->con_priv;
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index a8f0070c7aa9..f3e577335acb 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -79,5 +79,6 @@ struct cmdq_pkt {
 };
 
 u8 cmdq_get_shift_pa(struct mbox_chan *chan);
+void cmdq_mbox_stop(struct mbox_chan *chan);
 
 #endif /* __MTK_CMDQ_MAILBOX_H__ */
-- 
2.18.0