From 81fdc4983e33ef01935a9bf01187951aad34e2ac Mon Sep 17 00:00:00 2001
From: Chaotian Jing <chaotian.jing@mediatek.com>
Date: Mon, 16 Oct 2017 09:46:39 +0800
Subject: [PATCH 160/224] mmc: mediatek: perfer to use rise edge latching for
 cmd line

data lines have applied to perfer to use rise edge, also need
apply it to cmd line.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Tested-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/mtk-sd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1552,7 +1552,8 @@ static int msdc_tune_response(struct mmc
 	}
 	final_rise_delay = get_best_delay(host, rise_delay);
 	/* if rising edge has enough margin, then do not scan falling edge */
-	if (final_rise_delay.maxlen >= 12 && final_rise_delay.start < 4)
+	if (final_rise_delay.maxlen >= 12 ||
+	    (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
 		goto skip_fall;
 
 	sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
