From: Derong Liu <derong.liu@mediatek.com>
To: Chaotian Jing <chaotian.jing@mediatek.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: <linux-mmc@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <wsp_upstream@mediatek.com>,
Peng Zhou <peng.zhou@mediatek.com>,
Derong Liu <derong.liu@mediatek.com>
Subject: [PATCH] mmc: mediatek: add wait dma stop done flow
Date: Fri, 6 Aug 2021 10:30:55 +0800 [thread overview]
Message-ID: <20210806023055.29524-1-derong.liu@mediatek.com> (raw)
From: mtk13858 <derong.liu@mediatek.com>
it needs to wait for dma stop done after set dma stop.
Signed-off-by: mtk13858 <derong.liu@mediatek.com>
---
drivers/mmc/host/mtk-sd.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 4dfc246c5f95..1dfd2842471b 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -2339,6 +2339,8 @@ static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery)
if (recovery) {
sdr_set_field(host->base + MSDC_DMA_CTRL,
MSDC_DMA_CTRL_STOP, 1);
+ while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
+ cpu_relax();
msdc_reset_hw(host);
}
}
--
2.18.0
next reply other threads:[~2021-08-06 2:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-06 2:30 Derong Liu [this message]
2021-08-06 10:42 ` [PATCH] mmc: mediatek: add wait dma stop done flow Matthias Brugger
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