linux-kernel - Re: [PATCH V3 2/2] phy: qcom-qmp-ufs: Add Phy Configuration support for SC7280

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Message-ID: <CAA8EJpr-E=wASYXnsviLTwYEvkzOCDi-m5Nu8v-yV5=xKP5yEg@mail.gmail.com>
Date:   Mon, 18 Sep 2023 04:46:20 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Nitin Rawat <quic_nitirawa@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        vkoul@...nel.org, kishon@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Manish Pandey <quic_mapa@...cinc.com>
Subject: Re: [PATCH V3 2/2] phy: qcom-qmp-ufs: Add Phy Configuration support
 for SC7280

On Sun, 17 Sept 2023 at 17:23, Nitin Rawat <quic_nitirawa@...cinc.com> wrote:
>
>
>
> On 9/16/2023 12:03 AM, Dmitry Baryshkov wrote:
> > On Fri, 15 Sept 2023 at 19:14, Nitin Rawat <quic_nitirawa@...cinc.com> wrote:
> >>
> >>
> >>
> >> On 9/6/2023 1:34 AM, Dmitry Baryshkov wrote:
> >>> On 23/08/2023 12:17, Nitin Rawat wrote:
> >>>> Add SC7280 specific register layout and table configs.
> >>>>
> >>>> Co-developed-by: Manish Pandey <quic_mapa@...cinc.com>
> >>>> Signed-off-by: Manish Pandey <quic_mapa@...cinc.com>
> >>>> Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
> >>>> ---
> >>>>    drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 142 ++++++++++++++++++++++++
> >>>>    1 file changed, 142 insertions(+)
> >>>>
> >>>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
> >>>> b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
> >>>> index 3927eba8e468..514fa14df634 100644
> >>>> --- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
> >>>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
> >>>
> >>> [skipped tables programming]
> >>>
> >>> 4),
> >> Sorry I quite didn't get this comment. what exactly is skipped ?Please
> >> can you help explain?
> >
> > I skipped them, as I didn't have comments for them.
> >
> >>
> >>
> >>>> @@ -888,6 +993,40 @@ static const struct qmp_phy_cfg
> >>>> sa8775p_ufsphy_cfg = {
> >>>>        .regs            = ufsphy_v5_regs_layout,
> >>>>    };
> >>>>
> >>>> +static const struct qmp_phy_cfg sc7280_ufsphy_cfg = {
> >>>> +    .lanes                  = 2,
> >>>> +
> >>>> +    .offsets                = &qmp_ufs_offsets,
> >>>> +
> >>>> +    .tbls = {
> >>>> +        .serdes         = sm8150_ufsphy_serdes,
> >>>> +        .serdes_num     = ARRAY_SIZE(sm8150_ufsphy_serdes),
> >>>> +        .tx             = sc7280_ufsphy_tx,
> >>>> +        .tx_num         = ARRAY_SIZE(sc7280_ufsphy_tx),
> >>>> +        .rx             = sc7280_ufsphy_rx,
> >>>> +        .rx_num         = ARRAY_SIZE(sc7280_ufsphy_rx),
> >>>> +        .pcs            = sc7280_ufsphy_pcs,
> >>>> +        .pcs_num        = ARRAY_SIZE(sc7280_ufsphy_pcs),
> >>>> +    },
> >>>> +    .tbls_hs_b = {
> >>>> +        .serdes         = sm8150_ufsphy_hs_b_serdes,
> >>>> +        .serdes_num     = ARRAY_SIZE(sm8150_ufsphy_hs_b_serdes),
> >>>> +    },
> >>>> +    .tbls_hs_g4 = {
> >>>> +        .tx             = sm8250_ufsphy_hs_g4_tx,
> >>>> +        .tx_num         = ARRAY_SIZE(sm8250_ufsphy_hs_g4_tx),
> >>>> +        .rx             = sc7280_ufsphy_hs_g4_rx,
> >>>> +        .rx_num         = ARRAY_SIZE(sc7280_ufsphy_hs_g4_rx),
> >>>> +        .pcs            = sm8150_ufsphy_hs_g4_pcs,
> >>>> +        .pcs_num        = ARRAY_SIZE(sm8150_ufsphy_hs_g4_pcs),
> >>>> +    },
> >>>> +    .clk_list               = sm8450_ufs_phy_clk_l,
> >>>> +    .num_clks               = ARRAY_SIZE(sm8450_ufs_phy_clk_l),
> >>>
> >>> This doesn't correspond to the bindings. This array has 3 enries, while
> >>> in the bindings you have opted for two clocks for this PHY.
> >> Sure. I'll update the bindings.
> >
> > Are you sure about the third clock? Neither sm8150 nor sm8250 used the
> > qref clock. Or is that an omission on our side?
> >
>
> Hi Dmitry,
>
> For SC7280 we need all the three clocks for this target. Same is being
> used in downstream code as well. Hence I would need to update the
> binding as well.

Ack, thanks for the confirmation.

>
> Thanks,
> Nitin
>
>
> >>
> >>>
> >>>> +    .vreg_list              = qmp_phy_vreg_l,
> >>>> +    .num_vregs              = ARRAY_SIZE(qmp_phy_vreg_l),
> >>>> +    .regs                   = ufsphy_v4_regs_layout,
> >>>> +};
> >>>> +
> >>>>    static const struct qmp_phy_cfg sc8280xp_ufsphy_cfg = {
> >>>>        .lanes            = 2,
> >>>>
> >>>> @@ -1648,6 +1787,9 @@ static const struct of_device_id
> >>>> qmp_ufs_of_match_table[] = {
> >>>>        }, {
> >>>>            .compatible = "qcom,sa8775p-qmp-ufs-phy",
> >>>>            .data = &sa8775p_ufsphy_cfg,
> >>>> +    }, {
> >>>> +        .compatible = "qcom,sc7280-qmp-ufs-phy",
> >>>> +        .data = &sc7280_ufsphy_cfg,
> >>>>        }, {
> >>>>            .compatible = "qcom,sc8180x-qmp-ufs-phy",
> >>>>            .data = &sm8150_ufsphy_cfg,
> >>>> --
> >>>> 2.17.1
> >>>>
> >>>
> >> Thanks,
> >> Nitin
> >
> >
> >
--
With best wishes
Dmitry