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ram: rk3399: Update lpddr4 vref based on io settings

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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>
Reviewed-by: Kever Yang <Kever.yang@rock-chips.com>
This commit is contained in:
Jagan Teki 2019-07-16 17:27:26 +05:30 committed by Kever Yang
parent 4eceda01d5
commit 95be76eb5c
1 changed files with 14 additions and 5 deletions
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19
drivers/ram/rockchip/sdram_rk3399.c
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@ -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)