From c716bf67f5eb54ed64538f7ce70b36da04c55352 Mon Sep 17 00:00:00 2001
From: Jagan Teki <jagan@amarulasolutions.com>
Date: Tue, 16 Jul 2019 17:27:10 +0530
Subject: [PATCH] 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>
---
drivers/ram/rockchip/sdram_rk3399.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index b7cad9274b..3f20aba939 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)))
--
2.39.5