[PATCH 6.19 002/844] mmc: rtsx_pci_sdmmc: increase power-on settling delay to 5ms

[Sasha Levin]

From: Matthew Schwartz <matthew.schwartz@xxxxxxxxx>

[ Upstream commit aced969e9bf3701dc75cfca57c78c031b7875b9d ]

The existing 1ms delay in sd_power_on is insufficient and causes resume
errors around 4% of the time.

Increasing the delay to 5ms resolves this issue after testing 300
s2idle cycles.

Fixes: 1f311c94aabd ("mmc: rtsx: add 74 Clocks in power on flow")
Signed-off-by: Matthew Schwartz <matthew.schwartz@xxxxxxxxx>
Link: https://patch.msgid.link/20260105060236.400366-3-matthew.schwartz@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/mmc/host/rtsx_pci_sdmmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index 4db3328f46dfb..b6cf1803c7d27 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -937,7 +937,7 @@ static int sd_power_on(struct realtek_pci_sdmmc *host, unsigned char power_mode)
 	if (err < 0)
 		return err;
 
-	mdelay(1);
+	mdelay(5);
 
 	err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
 	if (err < 0)
-- 
2.51.0