The vref_mode_dq, vref_value_dq 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 --- drivers/ram/rockchip/sdram_rk3399.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c index 9eddfa7fd7..24db601072 100644 --- a/drivers/ram/rockchip/sdram_rk3399.c +++ b/drivers/ram/rockchip/sdram_rk3399.c @@ -338,7 +338,7 @@ static void set_memory_map(const struct chan_info *chan, u32 channel, }
static int phy_io_config(const struct chan_info *chan, - const struct rk3399_sdram_params *params) + const struct rk3399_sdram_params *params, u32 mr5) { u32 *denali_phy = chan->publ->denali_phy; u32 vref_mode_dq, vref_value_dq, vref_mode_ac, vref_value_ac; @@ -349,9 +349,18 @@ static int phy_io_config(const struct chan_info *chan,
/* vref setting */ if (params->base.dramtype == LPDDR4) { - /* LPDDR4 */ - vref_mode_dq = 0x6; - vref_value_dq = 0x1f; + struct io_setting *io = lpddr4_get_io_settings(params, mr5); + u32 rd_vref = io->rd_vref * 1000; + + if (rd_vref < 36700) { + /* MODE_LV[2:0] = LPDDR4 (Range 2)*/ + vref_mode_dq = 0x7; + vref_value_dq = (rd_vref - 3300) / 521; + } else { + /* MODE_LV[2:0] = LPDDR4 (Range 1)*/ + vref_mode_dq = 0x6; + vref_value_dq = (rd_vref - 15300) / 521; + } vref_mode_ac = 0x6; vref_value_ac = 0x1f; mode_sel = 0x6; @@ -770,7 +779,7 @@ static void set_ds_odt(const struct chan_info *chan, /* phy_pad_fdbk_term 1bit DENALI_PHY_930 offset_17 */ clrsetbits_le32(&denali_phy[930], 0x1 << 17, reg_value);
- phy_io_config(chan, params); + phy_io_config(chan, params, mr5); }
static void pctl_start(struct dram_info *dram, u8 channel)