[PATCH 3/9] soc: mediatek: cmdq: Add cmdq_pkt_eoc() helper function

[Chun-Kuang Hu <chunkuang.hu@kernel.org>]

cmdq_pkt_eoc() append eoc command to CMDQ packet. eoc command
would ask GCE to generate IRQ. It's usually appended to the end
of packet to notify all command in the packet is done.

Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 10 ++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  | 15 +++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index ed4ef95adf5b..e982997117c2 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -359,6 +359,16 @@ int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_pa)
 }
 EXPORT_SYMBOL(cmdq_pkt_jump);
 
+int cmdq_pkt_eoc(struct cmdq_pkt *pkt)
+{
+	struct cmdq_instruction inst = { {0} };
+
+	inst.op = CMDQ_CODE_EOC;
+	inst.value = CMDQ_EOC_IRQ_EN;
+	return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_eoc);
+
 int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
 {
 	struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 6215191a328d..a67f719dec0b 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -245,6 +245,16 @@ int cmdq_pkt_assign(struct cmdq_pkt *pkt, u16 reg_idx, u32 value);
  */
 int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_pa);
 
+/**
+ * cmdq_pkt_eoc() - Append eoc command to the CMDQ packet, ask GCE
+ *		    to generate IRQ. It's usually appended to the end of
+ *		    packet to notify that all command in the packet is done.
+ * @pkt:	the CMDQ packet
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_eoc(struct cmdq_pkt *pkt);
+
 /**
  * cmdq_pkt_finalize() - Append EOC and jump command to pkt.
  * @pkt:	the CMDQ packet
@@ -346,6 +356,11 @@ static inline int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_
 	return -EINVAL;
 }
 
+static inline int cmdq_pkt_eoc(struct cmdq_pkt *pkt)
+{
+	return -EINVAL;
+}
+
 static inline int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
 {
 	return -EINVAL;
-- 
2.34.1