ram: rk3399: Update lpddr4 mode_sel based on io settings

The mode_sel on lpddr4 value is depending on IO settings
of rd_vref.

Add support for it.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: YouMin Chen <cym@rock-chips.com>

diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index e1e7531..84a09fe 100644 (file)
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -347,7 +347,7 @@ static int phy_io_config(const struct chan_info *chan,
        u32 drv_value, odt_value;
        u32 speed;
 
-       /* vref setting */
+       /* vref setting & mode setting */
        if (params->base.dramtype == LPDDR4) {
                struct io_setting *io = lpddr4_get_io_settings(params, mr5);
                u32 rd_vref = io->rd_vref * 1000;
@@ -355,15 +355,18 @@ static int phy_io_config(const struct chan_info *chan,
                if (rd_vref < 36700) {
                        /* MODE_LV[2:0] = LPDDR4 (Range 2)*/
                        vref_mode_dq = 0x7;
+                       /* MODE[2:0]= LPDDR4 Range 2(0.4*VDDQ) */
+                       mode_sel = 0x5;
                        vref_value_dq = (rd_vref - 3300) / 521;
                } else {
                        /* MODE_LV[2:0] = LPDDR4 (Range 1)*/
                        vref_mode_dq = 0x6;
+                       /* MODE[2:0]= LPDDR4 Range 1(0.33*VDDQ) */
+                       mode_sel = 0x4;
                        vref_value_dq = (rd_vref - 15300) / 521;
                }
                vref_mode_ac = 0x6;
                vref_value_ac = 0x1f;
-               mode_sel = 0x6;
        } else if (params->base.dramtype == LPDDR3) {
                if (params->base.odt == 1) {
                        vref_mode_dq = 0x5;  /* LPDDR3 ODT */