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Message-ID: <20230419063048.10516-1-wenbin.mei@mediatek.com>
Date: Wed, 19 Apr 2023 14:30:48 +0800
From: Wenbin Mei <wenbin.mei@...iatek.com>
To: Ulf Hansson <ulf.hansson@...aro.org>
CC: Chaotian Jing <chaotian.jing@...iatek.com>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
Wenbin Mei <wenbin.mei@...iatek.com>
Subject: [PATCH] mmc: mtk-sd: reduce CIT for better performance
CQHCI_SSC1 indicates to CQE the polling period to use when using
periodic SEND_QUEUE_STATUS(CMD13) polling.
The default value is 0x1000, now change it to 0x40, which can
improve the performance of some eMMC devices.
Signed-off-by: Wenbin Mei <wenbin.mei@...iatek.com>
---
drivers/mmc/host/mtk-sd.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index edade0e54a0c..483353ea3a99 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -2453,6 +2453,7 @@ static void msdc_hs400_enhanced_strobe(struct mmc_host *mmc,
static void msdc_cqe_enable(struct mmc_host *mmc)
{
struct msdc_host *host = mmc_priv(mmc);
+ struct cqhci_host *cq_host = mmc->cqe_private;
/* enable cmdq irq */
writel(MSDC_INT_CMDQ, host->base + MSDC_INTEN);
@@ -2462,6 +2463,8 @@ static void msdc_cqe_enable(struct mmc_host *mmc)
msdc_set_busy_timeout(host, 20 * 1000000000ULL, 0);
/* default read data timeout 1s */
msdc_set_timeout(host, 1000000000ULL, 0);
+
+ cqhci_writel(cq_host, 0x40, CQHCI_SSC1);
}
static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery)
--
2.25.1
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