linux-kernel - [PATCH 1/1] scsi: ufs-mediatek: Add UFSHCD_QUIRK_BROKEN_LSDBS

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Message-ID: <20240818222442.44990-3-mary@mary.zone>
Date: Mon, 19 Aug 2024 00:24:42 +0200
From: Mary Guillemard <mary@...y.zone>
To: linux-kernel@...r.kernel.org
Cc: linux-scsi@...r.kernel.org,
	Mary Guillemard <mary@...y.zone>,
	Peter Wang <peter.wang@...iatek.com>,
	Stanley Jhu <chu.stanley@...il.com>,
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Subject: [PATCH 1/1] scsi: ufs-mediatek: Add UFSHCD_QUIRK_BROKEN_LSDBS_CAP

MT8183 supports UFSHCI 2.1 spec, but report a bogus value of 1 in the
reserved part for the Legacy Single Doorbell Support (LSDBS) capability.

This set UFSHCD_QUIRK_BROKEN_LSDBS_CAP when MCQ support is explicitly
disabled, allowing the device to be properly registered.

Signed-off-by: Mary Guillemard <mary@...y.zone>
---
 drivers/ufs/host/ufs-mediatek.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 02c9064284e1..9a5919434c4e 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -1026,6 +1026,9 @@ static int ufs_mtk_init(struct ufs_hba *hba)
 	if (host->caps & UFS_MTK_CAP_DISABLE_AH8)
 		hba->caps |= UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
 
+	if (host->caps & UFS_MTK_CAP_DISABLE_MCQ)
+		hba->quirks |= UFSHCD_QUIRK_BROKEN_LSDBS_CAP;
+
 	ufs_mtk_init_clocks(hba);
 
 	/*
-- 
2.46.0