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 (file)
--- 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)))