linux-kernel - [PATCH] mmc: mtk-sd: disable new_tx/rx and modify related settings for mt8189

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Message-ID: <20260204020709.24604-1-ot_cathy.xu@mediatek.com>
Date: Wed, 4 Feb 2026 10:06:29 +0800
From: Cathy Xu <ot_cathy.xu@...iatek.com>
To: Chaotian Jing <chaotian.jing@...iatek.com>, Ulf Hansson
	<ulf.hansson@...aro.org>, Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
CC: <linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	Mengqi Zhang <Mengqi.Zhang@...iatek.com>, Wenbin Mei
	<Wenbin.Mei@...iatek.com>, Andy-ld Lu <Andy-ld.Lu@...iatek.com>, Yong Mao
	<yong.mao@...iatek.com>, Cathy Xu <ot_cathy.xu@...iatek.com>
Subject: [PATCH] mmc: mtk-sd: disable new_tx/rx and modify related settings for mt8189

Disable new_tx/rx and modify related settings helps avoid data
transmission instability, and better compatibility for mt8189.

Signed-off-by: Cathy Xu <ot_cathy.xu@...iatek.com>
---
 drivers/mmc/host/mtk-sd.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 302ac8529c4f..b2680cc054bd 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -682,15 +682,15 @@ static const struct mtk_mmc_compatible mt8189_compat = {
 	.needs_top_base = true,
 	.pad_tune_reg = MSDC_PAD_TUNE0,
 	.async_fifo = true,
-	.data_tune = true,
+	.data_tune = false,
 	.busy_check = true,
 	.stop_clk_fix = true,
-	.stop_dly_sel = 1,
-	.pop_en_cnt = 2,
+	.stop_dly_sel = 3,
+	.pop_en_cnt = 8,
 	.enhance_rx = true,
 	.support_64g = true,
-	.support_new_tx = true,
-	.support_new_rx = true,
+	.support_new_tx = false,
+	.support_new_rx = false,
 	.support_spm_res_release = true,
 };
 
-- 
2.45.2