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>

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 3247a5aed7d848964f0eab1877da1566ed99d350..6457a7d8880f058a75598cdf1431933fdf740d30 100644 (file)
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1550,7 +1550,8 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
        }
        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);