linux-kernel - [PATCH v3 5/7] soc: mediatek: Add programming flow for unsupported subsys ID hardware

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Message-ID: <20241219170800.2957-6-jason-jh.lin@mediatek.com>
Date: Fri, 20 Dec 2024 01:07:58 +0800
From: Jason-JH.Lin <jason-jh.lin@...iatek.com>
To: Jassi Brar <jassisinghbrar@...il.com>, Chun-Kuang Hu
	<chunkuang.hu@...nel.org>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>, Mauro Carvalho Chehab
	<mchehab@...nel.org>
CC: David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<dri-devel@...ts.freedesktop.org>, <linux-mediatek@...ts.infradead.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-media@...r.kernel.org>,
	"Jason-JH . Lin" <jason-jh.lin@...iatek.com>, Singo Chang
	<singo.chang@...iatek.com>, Nancy Lin <nancy.lin@...iatek.com>, Moudy Ho
	<moudy.ho@...iatek.com>, Xavier Chang <xavier.chang@...iatek.com>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v3 5/7] soc: mediatek: Add programming flow for unsupported subsys ID hardware

To support hardware without subsys IDs on new SoCs, add a programming
flow that checks whether the subsys ID is valid. If the subsys ID is
invalid, the flow will call 2 alternative CMDQ APIs:
cmdq_pkt_assign() and cmdq_pkt_write_s_value() to achieve the same
functionality.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
---
 drivers/soc/mediatek/mtk-mmsys.c | 14 +++++++++++---
 drivers/soc/mediatek/mtk-mutex.c | 11 +++++++++--
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c
index bb4639ca0b8c..ce949b863b05 100644
--- a/drivers/soc/mediatek/mtk-mmsys.c
+++ b/drivers/soc/mediatek/mtk-mmsys.c
@@ -167,9 +167,17 @@ static void mtk_mmsys_update_bits(struct mtk_mmsys *mmsys, u32 offset, u32 mask,
 	u32 tmp;
 
 	if (mmsys->cmdq_base.size && cmdq_pkt) {
-		ret = cmdq_pkt_write_mask(cmdq_pkt, mmsys->cmdq_base.subsys,
-					  mmsys->cmdq_base.offset + offset, val,
-					  mask);
+		offset += mmsys->cmdq_base.offset;
+		if (mmsys->cmdq_base.subsys != CMDQ_SUBSYS_INVALID) {
+			ret = cmdq_pkt_write_mask(cmdq_pkt, mmsys->cmdq_base.subsys,
+						  offset, val, mask);
+		} else {
+			/* only MMIO access, no need to check mminfro_offset */
+			ret = cmdq_pkt_assign(cmdq_pkt, CMDQ_THR_SPR_IDX0,
+					      CMDQ_ADDR_HIGH(mmsys->cmdq_base.pa_base));
+			ret |= cmdq_pkt_write_s_mask_value(cmdq_pkt, CMDQ_THR_SPR_IDX0,
+							   CMDQ_ADDR_LOW(offset), val, mask);
+		}
 		if (ret)
 			pr_debug("CMDQ unavailable: using CPU write\n");
 		else
diff --git a/drivers/soc/mediatek/mtk-mutex.c b/drivers/soc/mediatek/mtk-mutex.c
index 5250c1d702eb..3788b16efbf4 100644
--- a/drivers/soc/mediatek/mtk-mutex.c
+++ b/drivers/soc/mediatek/mtk-mutex.c
@@ -963,6 +963,7 @@ int mtk_mutex_enable_by_cmdq(struct mtk_mutex *mutex, void *pkt)
 	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
 						 mutex[mutex->id]);
 	struct cmdq_pkt *cmdq_pkt = (struct cmdq_pkt *)pkt;
+	dma_addr_t en_addr = mtx->addr + DISP_REG_MUTEX_EN(mutex->id);
 
 	WARN_ON(&mtx->mutex[mutex->id] != mutex);
 
@@ -971,8 +972,14 @@ int mtk_mutex_enable_by_cmdq(struct mtk_mutex *mutex, void *pkt)
 		return -ENODEV;
 	}
 
-	cmdq_pkt_write(cmdq_pkt, mtx->cmdq_reg.subsys,
-		       mtx->addr + DISP_REG_MUTEX_EN(mutex->id), 1);
+	if (mtx->cmdq_reg.subsys != CMDQ_SUBSYS_INVALID) {
+		cmdq_pkt_write(cmdq_pkt, mtx->cmdq_reg.subsys, en_addr, 1);
+	} else {
+		/* only MMIO access, no need to check mminfro_offset */
+		cmdq_pkt_assign(cmdq_pkt, CMDQ_THR_SPR_IDX0, CMDQ_ADDR_HIGH(en_addr));
+		cmdq_pkt_write_s_value(cmdq_pkt, CMDQ_THR_SPR_IDX0, CMDQ_ADDR_LOW(en_addr), 1);
+	}
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(mtk_mutex_enable_by_cmdq);
-- 
2.43.0