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

Kever Yang
2019-07-16T13:11:41Z

On 2019/7/16 下午7:57, Jagan Teki wrote:
> 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>

Reviewed-by: Kever Yang <Kever.yang@rock-chips.com>

Thanks,
- Kever
> ---
> 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)))