linux-kernel - [PATCH v8, 1/4] mailbox: mtk-cmdq: add gce software ddr enable private data

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Message-ID: <20220930160638.7588-2-yongqiang.niu@mediatek.com>
Date:   Sat, 1 Oct 2022 00:06:35 +0800
From:   Yongqiang Niu <yongqiang.niu@...iatek.com>
To:     CK Hu <ck.hu@...iatek.com>, Chun-Kuang Hu <chunkuang.hu@...nel.org>
CC:     Jassi Brar <jassisinghbrar@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Yongqiang Niu <yongqiang.niu@...iatek.com>
Subject: [PATCH v8, 1/4] mailbox: mtk-cmdq: add gce software ddr enable private data

if gce work control by software, we need set software enable
for MT8186 Soc

there is a handshake flow between gce and ddr hardware,
if not set ddr enable flag of gce, ddr will fall into idle
mode, then gce instructions will not process done.
we need set this flag of gce to tell ddr when gce is idle or busy
controlled by software flow.

Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
---
 drivers/mailbox/mtk-cmdq-mailbox.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index 9465f9081515..88db6b4642db 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -38,6 +38,8 @@
 #define CMDQ_THR_PRIORITY		0x40
 
 #define GCE_GCTL_VALUE			0x48
+#define GCE_CTRL_BY_SW				GENMASK(2, 0)
+#define GCE_DDR_EN				GENMASK(18, 16)
 
 #define CMDQ_THR_ACTIVE_SLOT_CYCLES	0x3200
 #define CMDQ_THR_ENABLED		0x1
@@ -80,6 +82,7 @@ struct cmdq {
 	bool			suspended;
 	u8			shift_pa;
 	bool			control_by_sw;
+	bool			sw_ddr_en;
 	u32			gce_num;
 };
 
@@ -87,6 +90,7 @@ struct gce_plat {
 	u32 thread_nr;
 	u8 shift;
 	bool control_by_sw;
+	bool sw_ddr_en;
 	u32 gce_num;
 };
 
@@ -130,6 +134,10 @@ static void cmdq_init(struct cmdq *cmdq)
 	WARN_ON(clk_bulk_enable(cmdq->gce_num, cmdq->clocks));
 	if (cmdq->control_by_sw)
 		writel(0x7, cmdq->base + GCE_GCTL_VALUE);
+
+	if (cmdq->sw_ddr_en)
+		writel(GCE_DDR_EN | GCE_CTRL_BY_SW, cmdq->base + GCE_GCTL_VALUE);
+
 	writel(CMDQ_THR_ACTIVE_SLOT_CYCLES, cmdq->base + CMDQ_THR_SLOT_CYCLES);
 	for (i = 0; i <= CMDQ_MAX_EVENT; i++)
 		writel(i, cmdq->base + CMDQ_SYNC_TOKEN_UPDATE);
@@ -543,6 +551,7 @@ static int cmdq_probe(struct platform_device *pdev)
 	cmdq->thread_nr = plat_data->thread_nr;
 	cmdq->shift_pa = plat_data->shift;
 	cmdq->control_by_sw = plat_data->control_by_sw;
+	cmdq->sw_ddr_en = plat_data->sw_ddr_en;
 	cmdq->gce_num = plat_data->gce_num;
 	cmdq->irq_mask = GENMASK(cmdq->thread_nr - 1, 0);
 	err = devm_request_irq(dev, cmdq->irq, cmdq_irq_handler, IRQF_SHARED,
-- 
2.25.1