linux-kernel - [PATCH v3 4/9] soc: mediatek: cmdq: Add cmdq_pkt_write_s_reg

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Date: Fri, 22 Dec 2023 12:52:23 +0800
From: Jason-JH.Lin <jason-jh.lin@...iatek.com>
To: Jassi Brar <jassisinghbrar@...il.com>, Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Matthias Brugger
	<matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Chun-Kuang Hu
	<chunkuang.hu@...nel.org>
CC: Conor Dooley <conor+dt@...nel.org>, Mauro Carvalho Chehab
	<mchehab@...nel.org>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-media@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	Jason-ch Chen <jason-ch.chen@...iatek.com>, Johnson Wang
	<johnson.wang@...iatek.com>, "Jason-JH . Lin" <jason-jh.lin@...iatek.com>,
	Singo Chang <singo.chang@...iatek.com>, Nancy Lin <nancy.lin@...iatek.com>,
	Shawn Sung <shawn.sung@...iatek.com>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v3 4/9] soc: mediatek: cmdq: Add cmdq_pkt_write_s_reg_value to support write value to reg

Add cmdq_pkt_write_s_reg_value to support write a value to a register.

It appends write_s command to the command buffer in a CMDQ packet,
ask GCE to excute a write instruction to write a value to a register
with low 16 bits physical address offset.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 13 +++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  | 11 +++++++++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 60f8ecbab5e7..dfef436d9b8a 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -287,6 +287,19 @@ int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 }
 EXPORT_SYMBOL(cmdq_pkt_write_s_value);
 
+int cmdq_pkt_write_s_reg_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx, u32 value)
+{
+	struct cmdq_instruction inst = {};
+
+	inst.op = CMDQ_CODE_WRITE_S;
+	inst.dst_t = CMDQ_REG_TYPE;
+	inst.reg_dst = high_addr_reg_idx;
+	inst.value = value;
+
+	return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_write_s_reg_value);
+
 int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 				u16 addr_low, u32 value, u32 mask)
 {
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 73eadda1dd2d..d1cd8108cad0 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -208,6 +208,17 @@ int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 				u16 addr_low, u32 value, u32 mask);
 
+/**
+ * cmdq_pkt_write_s_reg_value() - append write_s command to the CMDQ packet which
+ *				  write value to a register with low address pa
+ * @pkt:	the CMDQ packet
+ * @high_addr_reg_idx:	internal register ID which contains high address of pa
+ * @value:	the specified target value
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_write_s_reg_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx, u32 value);
+
 /**
  * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
  * @pkt:	the CMDQ packet
-- 
2.18.0