Re: [PATCH v2 12/15] arm64: dts: rockchip: Enable dmc and dfi nodes on gru

[Peter Geis <pgwipeout@gmail.com>]

On Thu, Jan 27, 2022 at 6:17 PM Brian Norris <briannorris@chromium.org> wrote:
>
> From: Lin Huang <hl@rock-chips.com>
>
> Enable the DMC (Dynamic Memory Controller) and the DFI (DDR PHY
> Interface) nodes on gru boards so we can support DDR DVFS.
>
> Signed-off-by: Lin Huang <hl@rock-chips.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
> Signed-off-by: Gaël PORTAY <gael.portay@collabora.com>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
> Signed-off-by: Brian Norris <briannorris@chromium.org>
> Updates since the old series:
>
>  - reordered alphabetically by phandle name, per style
>  - drop a ton of deprecated/unused properties
>  - add required center-supply for scarlet
>  - add new *_idle_dis_freq properties
>  - drop the lowest (200 MHz) OPP; this was never stabilized for
>    production
>  - bump the voltage (0.9V -> 0.925V) for the highest OPP on Chromebook
>    models; later (tablet) models were more stable, with a fixed DDR
>    regulator
>  - bump odt_dis_freq to 666 MHz; early versions used 333 MHz, but
>    stabilization efforts landed on 666 MHz for production
>
> ---
>
> Changes in v2:
>  - Adapt to new properties
>
> Changes in v1:
> This was part of a previous series, at:
> https://lore.kernel.org/r/20210308233858.24741-3-daniel.lezcano@linaro.org
> I've picked up a bunch of changes and fixes, so I've restarted the patch
> series numbering.

Good Morning,

I'm trying to bring this series over to rockpro64 (and eventually the
pinephone-pro) and am running into some snags.
Essentially, anytime a transition happens, the board locks up.
I've disabled the extra power save disable flags and adjusted the OPPs
for rockpro64's power.
Transitions anywhere from the default 800mhz cause a lock.

I'm digging deeper, but I'm hoping you can answer some questions in
the meantime:
1. Does this require something from firmware that isn't available on
Mainline ATF? (AKA special firmware to the Chromebook line)
2. If not, do you have any recommendations off the top of your head?

Thanks,
Peter Geis

>
>  .../dts/rockchip/rk3399-gru-chromebook.dtsi   |  7 +++++
>  .../boot/dts/rockchip/rk3399-gru-scarlet.dtsi | 12 ++++++++
>  arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi  | 28 +++++++++++++++++++
>  .../boot/dts/rockchip/rk3399-op1-opp.dtsi     | 25 +++++++++++++++++
>  4 files changed, 72 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru-chromebook.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-gru-chromebook.dtsi
> index 9b2c679f5eca..cc8950046d94 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-gru-chromebook.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-gru-chromebook.dtsi
> @@ -234,6 +234,13 @@ &cdn_dp {
>         extcon = <&usbc_extcon0>, <&usbc_extcon1>;
>  };
>
> +&dmc {
> +       center-supply = <&ppvar_centerlogic>;
> +       rockchip,pd-idle-dis-freq-hz = <800000000>;
> +       rockchip,sr-idle-dis-freq-hz = <800000000>;
> +       rockchip,sr-mc-gate-idle-dis-freq-hz = <800000000>;
> +};
> +
>  &edp {
>         status = "okay";
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi
> index a9817b3d7edc..913d845eb51a 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi
> @@ -391,6 +391,18 @@ &cru {
>                 <400000000>;
>  };
>
> +/* The center supply is fixed to .9V on scarlet */
> +&dmc {
> +       center-supply = <&pp900_s0>;
> +};
> +
> +/* We don't need .925 V for 928 MHz on scarlet */
> +&dmc_opp_table {
> +       opp03 {
> +               opp-microvolt = <900000>;
> +       };
> +};
> +
>  &gpio0 {
>         gpio-line-names = /* GPIO0 A 0-7 */
>                           "CLK_32K_AP",
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
> index 162f08bca0d4..23bfba86daab 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
> @@ -373,6 +373,34 @@ &cru {
>                 <200000000>;
>  };
>
> +&dfi {
> +       status = "okay";
> +};
> +
> +&dmc {
> +       status = "okay";
> +
> +       rockchip,pd-idle-ns = <160>;
> +       rockchip,sr-idle-ns = <10240>;
> +       rockchip,sr-mc-gate-idle-ns = <40960>;
> +       rockchip,srpd-lite-idle-ns = <61440>;
> +       rockchip,standby-idle-ns = <81920>;
> +
> +       rockchip,ddr3_odt_dis_freq = <666000000>;
> +       rockchip,lpddr3_odt_dis_freq = <666000000>;
> +       rockchip,lpddr4_odt_dis_freq = <666000000>;
> +
> +       rockchip,sr-mc-gate-idle-dis-freq-hz = <1000000000>;
> +       rockchip,srpd-lite-idle-dis-freq-hz = <0>;
> +       rockchip,standby-idle-dis-freq-hz = <928000000>;
> +};
> +
> +&dmc_opp_table {
> +       opp03 {
> +               opp-suspend;
> +       };
> +};
> +
>  &emmc_phy {
>         status = "okay";
>  };
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-op1-opp.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-op1-opp.dtsi
> index 2180e0f75003..6e29e74f6fc6 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-op1-opp.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-op1-opp.dtsi
> @@ -110,6 +110,27 @@ opp05 {
>                         opp-microvolt = <1075000>;
>                 };
>         };
> +
> +       dmc_opp_table: dmc_opp_table {
> +               compatible = "operating-points-v2";
> +
> +               opp00 {
> +                       opp-hz = /bits/ 64 <400000000>;
> +                       opp-microvolt = <900000>;
> +               };
> +               opp01 {
> +                       opp-hz = /bits/ 64 <666000000>;
> +                       opp-microvolt = <900000>;
> +               };
> +               opp02 {
> +                       opp-hz = /bits/ 64 <800000000>;
> +                       opp-microvolt = <900000>;
> +               };
> +               opp03 {
> +                       opp-hz = /bits/ 64 <928000000>;
> +                       opp-microvolt = <925000>;
> +               };
> +       };
>  };
>
>  &cpu_l0 {
> @@ -136,6 +157,10 @@ &cpu_b1 {
>         operating-points-v2 = <&cluster1_opp>;
>  };
>
> +&dmc {
> +       operating-points-v2 = <&dmc_opp_table>;
> +};
> +
>  &gpu {
>         operating-points-v2 = <&gpu_opp_table>;
>  };
> --
> 2.35.0.rc0.227.g00780c9af4-goog
>
>
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