From: Jagan Teki <jagan@amarulasolutions.com>
Date: Tue, 16 Jul 2019 11:57:10 +0000 (+0530)
Subject: ram: rk3399: Add lpddr4 rank mask for wdql training
X-Git-Tag: v2019.10-rc1~20^2~92
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c716bf67f5eb54ed64538f7ce70b36da04c55352;p=platform%2Fkernel%2Fu-boot.git

ram: rk3399: Add lpddr4 rank mask for wdql training

Add rank_mask based on the rank number for lpddr4.

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 b7cad92..3f20aba 100644
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -925,7 +925,10 @@ static int data_training_wdql(const struct chan_info *chan, u32 channel,
 	/* clear interrupt,PI_175 PI_INT_ACK:WR:0:17 */
 	writel(0x00003f7c, (&denali_pi[175]));
 
-	rank_mask = (rank == 1) ? 0x1 : 0x3;
+	if (params->base.dramtype == LPDDR4)
+		rank_mask = (rank == 1) ? 0x5 : 0xf;
+	else
+		rank_mask = (rank == 1) ? 0x1 : 0x3;
 
 	for (i = 0; i < 4; i++) {
 		if (!(rank_mask & (1 << i)))