[PATCH 09/92] ram: rk3399: Use rank mask in wdql data training

Jagan Teki
2019-06-11T14:50:12Z

Add rank_mask based on the rank number, 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-dyjBcgdgk7Pe9wHmmfpqLFaTQe2KTcn/@public.gmane.org>
Signed-off-by: YouMin Chen <cym-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---
drivers/ram/rockchip/sdram_rk3399.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index 312d19f95f..1541b34a7d 100644
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -852,11 +852,17 @@ static int data_training_wdql(const struct chan_info *chan, u32 channel,
u32 *denali_pi = chan->pi->denali_pi;
u32 i, tmp;
u32 rank = sdram_params->ch[channel].rank;
+ u32 rank_mask;

/* clear interrupt,PI_175 PI_INT_ACK:WR:0:17 */
writel(0x00003f7c, (&denali_pi[175]));

- for (i = 0; i < rank; i++) {
+ rank_mask = (rank == 1) ? 0x1 : 0x3;
+
+ for (i = 0; i < 4; i++) {
+ if (!(rank_mask & (1 << i)))
+ continue;
+
select_per_cs_training_index(chan, i);

/*
--
2.18.0.321.gffc6fa0e3