Messages in this thread | | | Date | Wed, 18 May 2022 11:27:22 -0700 | Subject | Re: [PATCH v2 1/2] phy/qcom: add regulator_set_load to edp/dp phy | From | Kuogee Hsieh <> |
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On 5/18/2022 10:52 AM, Dmitry Baryshkov wrote: > On 18/05/2022 20:36, Kuogee Hsieh wrote: >> >> On 5/18/2022 10:12 AM, Dmitry Baryshkov wrote: >>> On Wed, 18 May 2022 at 19:43, Kuogee Hsieh <quic_khsieh@quicinc.com> >>> wrote: >>>> This patch add regulator_set_load() to both eDP and DP phy driver >>>> to have totally control regulators. >>>> >>>> Changes in v2: >>>> -- no regulator_set_laod() before disable regulator >>>> >>>> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> >>>> --- >>>> drivers/phy/qualcomm/phy-qcom-edp.c | 25 +++++++++++++++++++++---- >>>> drivers/phy/qualcomm/phy-qcom-qmp.c | 13 +++++++++++++ >>> Split into -edp and -qmp part. >>> >>>> 2 files changed, 34 insertions(+), 4 deletions(-) >>>> >>>> diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c >>>> b/drivers/phy/qualcomm/phy-qcom-edp.c >>>> index cacd32f..9b55095 100644 >>>> --- a/drivers/phy/qualcomm/phy-qcom-edp.c >>>> +++ b/drivers/phy/qualcomm/phy-qcom-edp.c >>>> @@ -87,17 +87,24 @@ struct qcom_edp { >>>> >>>> struct clk_bulk_data clks[2]; >>>> struct regulator_bulk_data supplies[2]; >>>> + int enable_load[2]; >>>> + int disable_load[2]; >>> As noticed in the review of the previous patch, disable_load is >>> unnecessary. >>> >>>> }; >>>> >>>> static int qcom_edp_phy_init(struct phy *phy) >>>> { >>>> struct qcom_edp *edp = phy_get_drvdata(phy); >>>> int ret; >>>> + int num_consumers = ARRAY_SIZE(edp->supplies); >>>> + int i; >>>> >>>> - ret = regulator_bulk_enable(ARRAY_SIZE(edp->supplies), >>>> edp->supplies); >>>> + ret = regulator_bulk_enable(num_consumers, edp->supplies); >>>> if (ret) >>>> return ret; >>>> >>>> + for (i = num_consumers - 1; i >= 0; --i) >>>> + regulator_set_load(edp->supplies[i].consumer, edp->enable_load[i]); >>>> + >>>> ret = clk_bulk_prepare_enable(ARRAY_SIZE(edp->clks), >>>> edp->clks); >>>> if (ret) >>>> goto out_disable_supplies; >>>> @@ -425,9 +432,15 @@ static int qcom_edp_phy_power_off(struct phy >>>> *phy) >>>> static int qcom_edp_phy_exit(struct phy *phy) >>>> { >>>> struct qcom_edp *edp = phy_get_drvdata(phy); >>>> + int num_consumers = ARRAY_SIZE(edp->supplies); >>>> + int i; >>>> >>>> clk_bulk_disable_unprepare(ARRAY_SIZE(edp->clks), edp->clks); >>>> - regulator_bulk_disable(ARRAY_SIZE(edp->supplies), >>>> edp->supplies); >>>> + >>>> + for (i = num_consumers - 1; i >= 0; --i) >>>> + regulator_set_load(edp->supplies[i].consumer, edp->disable_load[i]); >>>> + >>>> + regulator_bulk_disable(num_consumers, edp->supplies); >>>> >>>> return 0; >>>> } >>>> @@ -633,8 +646,12 @@ static int qcom_edp_phy_probe(struct >>>> platform_device *pdev) >>>> if (ret) >>>> return ret; >>>> >>>> - edp->supplies[0].supply = "vdda-phy"; >>>> - edp->supplies[1].supply = "vdda-pll"; >>>> + edp->supplies[0].supply = "vdda-1p2"; >>>> + edp->supplies[1].supply = "vdda-0p9"; >>> NAK, You can not randomly change supply names. >> >> if you do no change here, then we have to change dtsi. >> >> They are not match. > > Where is no match? I don't see any in-kernel dtsi using them.
my mistake, we did not pull in Doug's patch at our internal release where i run my test.
> > >>>> + edp->enable_load[0] = 21800; /* 1.2 V */ >>>> + edp->enable_load[1] = 36000; /* 1.2 V */ >>>> + edp->disable_load[0] = 4; /* 0.9 V */ >>>> + edp->disable_load[1] = 4; /* 10.9V */ >>> Again, 10.9V here. Kuogee. Have you read the review points? >> I have read it. but forget to make change at edp file. >>> >>>> ret = devm_regulator_bulk_get(dev, >>>> ARRAY_SIZE(edp->supplies), edp->supplies); >>>> if (ret) >>>> return ret; >>>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c >>>> b/drivers/phy/qualcomm/phy-qcom-qmp.c >>>> index b144ae1..0a4c8a8 100644 >>>> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c >>>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c >>>> @@ -3130,6 +3130,7 @@ struct qmp_phy_cfg { >>>> int num_resets; >>>> /* regulators to be requested */ >>>> const char * const *vreg_list; >>>> + const unsigned int *vreg_enable_load; >>>> int num_vregs; >>>> >>>> /* array of registers with different offsets */ >>>> @@ -3346,6 +3347,10 @@ static const char * const qmp_phy_vreg_l[] = { >>>> "vdda-phy", "vdda-pll", >>>> }; >>>> >>>> +static const unsigned int qmp_phy_vreg_enable_load[] = { >>>> + 21800, 36000 >>>> +}; >>>> + >>>> static const struct qmp_phy_cfg ipq8074_usb3phy_cfg = { >>>> .type = PHY_TYPE_USB3, >>>> .nlanes = 1, >>>> @@ -4072,6 +4077,7 @@ static const struct qmp_phy_cfg >>>> sm8250_usb3phy_cfg = { >>>> .reset_list = msm8996_usb3phy_reset_l, >>>> .num_resets = >>>> ARRAY_SIZE(msm8996_usb3phy_reset_l), >>>> .vreg_list = qmp_phy_vreg_l, >>>> + .vreg_enable_load = qmp_phy_vreg_enable_load, >>>> .num_vregs = ARRAY_SIZE(qmp_phy_vreg_l), >>>> .regs = qmp_v4_usb3phy_regs_layout, >>>> >>>> @@ -4139,6 +4145,7 @@ static const struct qmp_phy_cfg >>>> sm8250_dpphy_cfg = { >>>> .reset_list = msm8996_usb3phy_reset_l, >>>> .num_resets = >>>> ARRAY_SIZE(msm8996_usb3phy_reset_l), >>>> .vreg_list = qmp_phy_vreg_l, >>>> + .vreg_enable_load = qmp_phy_vreg_enable_load, > > So, you apply this change only to the sm8250 (sc7280) config. Are you > sure that both of them have the same requirement? > > Also there are other DP phy instances (sc8180x, sc7180). Do they have > to be extended too? > >>>> .num_vregs = ARRAY_SIZE(qmp_phy_vreg_l), >>>> .regs = qmp_v4_usb3phy_regs_layout, >>>> >>>> @@ -5008,6 +5015,11 @@ static int qcom_qmp_phy_com_init(struct >>>> qmp_phy *qphy) >>>> return 0; >>>> } >>>> >>>> + if (cfg->vreg_enable_load) { >>>> + for (i = cfg->num_vregs - 1; i >= 0; --i) >>> What's the point of iterating the list backwards? >> >> do no know, >> >> I just follow the order from regulator_bulk_enable() > > regulator_bulk_enable() iterates the list in the ascending order. > >> >>> >>>> + regulator_set_load(qmp->vregs[i].consumer, >>>> cfg->vreg_enable_load[i]); >>>> + } >>>> + >>>> /* turn on regulator supplies */ >>>> ret = regulator_bulk_enable(cfg->num_vregs, qmp->vregs); >>>> if (ret) { >>>> @@ -5116,6 +5128,7 @@ static int qcom_qmp_phy_com_exit(struct >>>> qmp_phy *qphy) >>>> >>>> clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks); >>>> >>>> + /* no minimum load set required before disable regulator */ >>> No otneed for the comment. >>> >>>> regulator_bulk_disable(cfg->num_vregs, qmp->vregs); >>>> >>>> mutex_unlock(&qmp->phy_mutex); >>>> -- >>>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora >>>> Forum, >>>> a Linux Foundation Collaborative Project >>>> >>> > >
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