From: Jagan Teki <jagan@amarulasolutions.com>
Date: Mon, 15 Jul 2019 18:28:42 +0000 (+0530)
Subject: ram: rk3399: Use rank mask in wdql data training
X-Git-Tag: v2019.10-rc1~20^2~115
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=21cf392b1f3444c9d758f028de0e3630631ba75b;p=oweals%2Fu-boot.git

ram: rk3399: Use rank mask in wdql data training

Add rank_mask based on the rank number, this would keep
the wdql data training loop based on the desired rank mask
value instead of looping for all values.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: YouMin Chen <cym@rock-chips.com>
Reviewed-by: Kever Yang <Kever.yang@rock-chips.com>
---

diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index b98df20fa5..16bd9427a6 100644
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -861,11 +861,17 @@ static int data_training_wdql(const struct chan_info *chan, u32 channel,
 	u32 *denali_pi = chan->pi->denali_pi;
 	u32 i, tmp;
 	u32 rank = params->ch[channel].cap_info.rank;
+	u32 rank_mask;
 
 	/* clear interrupt,PI_175 PI_INT_ACK:WR:0:17 */
 	writel(0x00003f7c, (&denali_pi[175]));
 
-	for (i = 0; i < rank; i++) {
+	rank_mask = (rank == 1) ? 0x1 : 0x3;
+
+	for (i = 0; i < 4; i++) {
+		if (!(rank_mask & (1 << i)))
+			continue;
+
 		select_per_cs_training_index(chan, i);
 
 		/*