linux-kernel - [PATCH v6 07/16] soc: mediatek: cmdq: add assign function

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Date:   Fri, 29 May 2020 01:04:42 +0800
From:   Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Jassi Brar <jassisinghbrar@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <wsd_upstream@...iatek.com>, <dri-devel@...ts.freedesktop.org>,
        Bibby Hsieh <bibby.hsieh@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>,
        Houlong Wei <houlong.wei@...iatek.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        HS Liao <hs.liao@...iatek.com>,
        Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
Subject: [PATCH v6 07/16] soc: mediatek: cmdq: add assign function

Add assign function in cmdq helper which assign constant value into
internal register by index.

Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
Reviewed-by: CK Hu <ck.hu@...iatek.com>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c   | 24 +++++++++++++++++++++++-
 include/linux/mailbox/mtk-cmdq-mailbox.h |  1 +
 include/linux/soc/mediatek/mtk-cmdq.h    | 14 ++++++++++++++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 98f23ba3ba47..33153d17c9d9 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -12,6 +12,7 @@
 #define CMDQ_WRITE_ENABLE_MASK	BIT(0)
 #define CMDQ_POLL_ENABLE_MASK	BIT(0)
 #define CMDQ_EOC_IRQ_EN		BIT(0)
+#define CMDQ_REG_TYPE		1
 
 struct cmdq_instruction {
 	union {
@@ -21,8 +22,17 @@ struct cmdq_instruction {
 	union {
 		u16 offset;
 		u16 event;
+		u16 reg_dst;
+	};
+	union {
+		u8 subsys;
+		struct {
+			u8 sop:5;
+			u8 arg_c_t:1;
+			u8 arg_b_t:1;
+			u8 dst_t:1;
+		};
 	};
-	u8 subsys;
 	u8 op;
 };
 
@@ -277,6 +287,18 @@ int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys,
 }
 EXPORT_SYMBOL(cmdq_pkt_poll_mask);
 
+int cmdq_pkt_assign(struct cmdq_pkt *pkt, u16 reg_idx, u32 value)
+{
+	struct cmdq_instruction inst = { {0} };
+
+	inst.op = CMDQ_CODE_LOGIC;
+	inst.dst_t = CMDQ_REG_TYPE;
+	inst.reg_dst = reg_idx;
+	inst.value = value;
+	return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_assign);
+
 static int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
 {
 	struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index dfe5b2eb85cc..121c3bb6d3de 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -59,6 +59,7 @@ enum cmdq_code {
 	CMDQ_CODE_JUMP = 0x10,
 	CMDQ_CODE_WFE = 0x20,
 	CMDQ_CODE_EOC = 0x40,
+	CMDQ_CODE_LOGIC = 0xa0,
 };
 
 enum cmdq_cb_status {
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index a74c1d5acdf3..83340211e1d3 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -152,6 +152,20 @@ int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,
  */
 int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys,
 		       u16 offset, u32 value, u32 mask);
+
+/**
+ * cmdq_pkt_assign() - Append logic assign command to the CMDQ packet, ask GCE
+ *		       to execute an instruction that set a constant value into
+ *		       internal register and use as value, mask or address in
+ *		       read/write instruction.
+ * @pkt:	the CMDQ packet
+ * @reg_idx:	the CMDQ internal register ID
+ * @value:	the specified value
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_assign(struct cmdq_pkt *pkt, u16 reg_idx, u32 value);
+
 /**
  * cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ
  *                          packet and call back at the end of done packet
-- 
2.18.0