linux-kernel - [PATCH V1 1/1] mmc:sdhci:Fix the SD tuning CMD parameter issue that the SDHCI_TRANSFER_MODE is cleared from read direction to write direction incorrectly

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Message-Id: <20220720123737.117-1-charl.liu@bayhubtech.com>
Date:   Wed, 20 Jul 2022 05:37:37 -0700
From:   Charl Liu <charl.liu@...hubtech.com>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     shaper.liu@...hubtech.com, chevron.li@...hubtech.com,
        thomas.hu@...hubtech.com, xiaoguang.yu@...hubtech.com,
        shirley.her@...hubtech.com
Subject: [PATCH V1 1/1] mmc:sdhci:Fix the SD tuning CMD parameter issue that the SDHCI_TRANSFER_MODE is cleared from read direction to write direction incorrectly

When cmd->opcode == MMC_SEND_TUNING_BLOCK, the SDHCI_TRANSFER_MODE
should also be kept

Signed-off-by: Charl Liu <charl.liu@...hubtech.com>
---
Change in V1:
Keeping the SDHCI_TRANSFER_MODE when cmd->opcode == MMC_END_TUNING_
BLOCK
---
 drivers/mmc/host/sdhci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 22152029e14c..6a0f6725dadb 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1430,7 +1430,8 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
 		if (host->quirks2 &
 			SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD) {
 			/* must not clear SDHCI_TRANSFER_MODE when tuning */
-			if (cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200)
+			if ((cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) &&
+			(cmd->opcode != MMC_SEND_TUNING_BLOCK))
 				sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE);
 		} else {
 		/* clear Auto CMD settings for no data CMDs */
-- 
2.32.0