mmc: sdhci-pci-o2micro: Fix card detect by dealing with debouncing

The result from ->get_cd() may be incorrect as the card detect debouncing
isn't managed correctly. Let's fix it.

Signed-off-by: Chevron Li<[email protected]>
Fixes: 7d44061 ("mmc: sdhci-pci-o2micro: Fix O2 Host data read/write DLL Lock phase shift issue")
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
[Ulf: Updated the commit message]
Signed-off-by: Ulf Hansson <[email protected]>

Author: Chevron Li

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);
 }