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From:   Chevron Li <chevron.li@bayhubtech.com>
To:     adrian.hunter@intel.com, ulf.hansson@linaro.org,
        linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org
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        xiaoguang.yu@bayhubtech.com, shirley.her@bayhubtech.com,
        fred.ai@bayhubtech.com
Subject: [PATCH V1 1/1] mmc:sdhci-pci-o2micro:fix card detect issue because card detect debouncing isn't done
Date:   Thu,  2 Jun 2022 06:25:43 -0700
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get_cd result is uncorrect during card detect debouncing
we need to wait card detect stable before return get_cd result

Signed-off-by: Chevron Li<chevron.li@bayhubtech.com>
---
change in V1:
add wait card detect stable logical before return card detect result.
---
 drivers/mmc/host/sdhci-pci-o2micro.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mmc/host/sdhci-pci-o2micro.c b/drivers/mmc/host/sdhci-pci-o2micro.c
index 92c20cb8074a..0d4d343dbb77 100644
--- a/drivers/mmc/host/sdhci-pci-o2micro.c
+++ b/drivers/mmc/host/sdhci-pci-o2micro.c
@@ -152,6 +152,8 @@ static int sdhci_o2_get_cd(struct mmc_host *mmc)
 
 	if (!(sdhci_readw(host, O2_PLL_DLL_WDT_CONTROL1) & O2_PLL_LOCK_STATUS))
 		sdhci_o2_enable_internal_clock(host);
+	else
+		sdhci_o2_wait_card_detect_stable(host);
 
 	return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 }

base-commit: d1dc87763f406d4e67caf16dbe438a5647692395
-- 
2.32.0