[PATCH v2 13/14] soc: mediatek: cmdq: add wait no clear event function

[Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com>]

Add wait no clear event function in cmdq helper functions to wait specific
event without clear to 0 after receive it.

Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 15 +++++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  | 10 ++++++++++
 2 files changed, 25 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 10a9b4481e58..6f270fadfb50 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -330,6 +330,21 @@ int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
 }
 EXPORT_SYMBOL(cmdq_pkt_wfe);
 
+int cmdq_pkt_wait_no_clear(struct cmdq_pkt *pkt, u16 event)
+{
+	struct cmdq_instruction inst = { {0} };
+
+	if (event >= CMDQ_MAX_EVENT)
+		return -EINVAL;
+
+	inst.op = CMDQ_CODE_WFE;
+	inst.value = CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE;
+	inst.event = event;
+
+	return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_wait_no_clear);
+
 int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event)
 {
 	struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index d15d8c941992..40bc61ad8d31 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -149,6 +149,16 @@ int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, dma_addr_t addr,
  */
 int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event);
 
+/**
+ * cmdq_pkt_wait_no_clear() - Append wait for event command to the CMDQ packet,
+ *			      without update event to 0 after receive it.
+ * @pkt:	the CMDQ packet
+ * @event:	the desired event type to wait
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_wait_no_clear(struct cmdq_pkt *pkt, u16 event);
+
 /**
  * cmdq_pkt_clear_event() - append clear event command to the CMDQ packet
  * @pkt:	the CMDQ packet
-- 
2.18.0