[U-Boot] [PATCH v3 21/57] ram: rk3399: Add lpddr4 rank mask for ca training

Jagan Teki
2019-07-16T11:57:09Z

Add rank_mask based on the rank number for lpddr4.

This would keep the ca 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>
---
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 a49677285d..8ecc3a1b74 100644
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -687,7 +687,10 @@ static int data_training_ca(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)))
--
2.18.0.321.gffc6fa0e3