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Date: Wed, 18 May 2022 09:07:48 -0700
From: Kuogee Hsieh <quic_khsieh@...cinc.com>
To: Vinod Koul <vkoul@...nel.org>
CC: <dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
<sean@...rly.run>, <swboyd@...omium.org>, <dianders@...omium.org>,
<daniel@...ll.ch>, <airlied@...ux.ie>, <agross@...nel.org>,
<dmitry.baryshkov@...aro.org>, <bjorn.andersson@...aro.org>,
<quic_abhinavk@...cinc.com>, <quic_aravindh@...cinc.com>,
<quic_sbillaka@...cinc.com>, <freedreno@...ts.freedesktop.org>,
<linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/2] phy/qcom: add regulator_set_load to edp/dp phy
On 5/18/2022 2:29 AM, Vinod Koul wrote:
> On 17-05-22, 10:25, Kuogee Hsieh wrote:
>
> pls use the correct subsystem tag, "phy: xxx" in this case
>
>> This patch add regulator_set_load() to both eDP and DP phy driver
>> to have totally control regulators.
> Can you explain what is meant by "totally control regulators"
Original regulator_set_load() is done by DP controller.
This patch has moved regulator_set_load() from DP controller to DP phy.
Therefore DP phy has total control of both vdda-phy and vda-pll regulators.
>
>> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
>> ---
>> drivers/phy/qualcomm/phy-qcom-edp.c | 25 +++++++++++++++++++++----
>> drivers/phy/qualcomm/phy-qcom-qmp.c | 24 ++++++++++++++++++++++++
>> 2 files changed, 45 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];
>> };
>>
>> 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";
> These are documented in bindings, so cannot be removed, Reminder binding
> is an ABI
>
> You have not documented the new names either...
>
>> + 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 */
> is that correct, 10.9V?
>
>> 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..c589231 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> This is a different driver, so should be a different patch!
>
>> @@ -3130,6 +3130,8 @@ struct qmp_phy_cfg {
>> int num_resets;
>> /* regulators to be requested */
>> const char * const *vreg_list;
>> + const unsigned int *vreg_enable_load;
>> + const unsigned int *vreg_disable_load;
>> int num_vregs;
>>
>> /* array of registers with different offsets */
>> @@ -3346,6 +3348,14 @@ 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 unsigned int qmp_phy_vreg_disable_load[] = {
>> + 4, 32
>> +};
>> +
>> static const struct qmp_phy_cfg ipq8074_usb3phy_cfg = {
>> .type = PHY_TYPE_USB3,
>> .nlanes = 1,
>> @@ -4072,6 +4082,8 @@ 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,
>> + .vreg_disable_load = qmp_phy_vreg_disable_load,
>> .num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
>> .regs = qmp_v4_usb3phy_regs_layout,
>>
>> @@ -4139,6 +4151,8 @@ 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,
>> + .vreg_disable_load = qmp_phy_vreg_disable_load,
>> .num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
>> .regs = qmp_v4_usb3phy_regs_layout,
>>
>> @@ -5015,6 +5029,11 @@ static int qcom_qmp_phy_com_init(struct qmp_phy *qphy)
>> goto err_reg_enable;
>> }
>>
>> + if (cfg->vreg_enable_load) {
>> + for (i = cfg->num_vregs - 1; i >= 0; --i)
>> + regulator_set_load(qmp->vregs[i].consumer, cfg->vreg_enable_load[i]);
>> + }
>> +
>> for (i = 0; i < cfg->num_resets; i++) {
>> ret = reset_control_assert(qmp->resets[i]);
>> if (ret) {
>> @@ -5116,6 +5135,11 @@ static int qcom_qmp_phy_com_exit(struct qmp_phy *qphy)
>>
>> clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks);
>>
>> + if (cfg->vreg_disable_load[i]) {
>> + for (i = cfg->num_vregs - 1; i >= 0; --i)
>> + regulator_set_load(qmp->vregs[i].consumer, cfg->vreg_disable_load[i]);
>> + }
>> +
>> 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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