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ram: rk3399: Add lpddr4 rank mask for wdql training

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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>
This commit is contained in:
Jagan Teki 2019-07-16 17:27:10 +05:30 • committed by Kever Yang
parent 3dae87da89
commit c716bf67f5
1 changed files with 4 additions and 1 deletions
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5
drivers/ram/rockchip/sdram_rk3399.c
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@ -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)))