[v3,39/57] ram: rk3399: Update lpddr4 mode_sel based on io settings
diff mbox series

Message ID 20190716115745.12585-40-jagan@amarulasolutions.com
State New
Headers show
Series
  • ram: rk3399: Add LPDDR4 support
Related show

Commit Message

Jagan Teki July 16, 2019, 11:57 a.m. UTC 
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>
---
 drivers/ram/rockchip/sdram_rk3399.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Comments

Kever Yang July 16, 2019, 1:16 p.m. UTC | #1 
On 2019/7/16 下午7:57, Jagan Teki wrote:
> 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>

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

Thanks,
  - Kever
> ---
>   drivers/ram/rockchip/sdram_rk3399.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
> index 4a2622a440..63763062f9 100644
> --- 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 */

Patch
diff mbox series 

diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index 4a2622a440..63763062f9 100644
--- 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 */