linux-kernel - Re: [PATCH v4 06/13] phy: qcom: qmp-usbc: Move reset config into PHY cfg

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Message-ID: <5d25d05e-d545-4b2f-98f5-40bfbcd24d7a@oss.qualcomm.com>
Date: Fri, 12 Sep 2025 19:49:52 +0800
From: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I
 <kishon@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov
 <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        fange.zhang@....qualcomm.com, yongxing.mou@....qualcomm.com,
        li.liu@....qualcomm.com, tingwei.zhang@....qualcomm.com,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Subject: Re: [PATCH v4 06/13] phy: qcom: qmp-usbc: Move reset config into PHY
 cfg


On 9/12/2025 5:56 PM, Dmitry Baryshkov wrote:
> On Thu, Sep 11, 2025 at 10:55:03PM +0800, Xiangxu Yin wrote:
>> Move reset configuration to be managed via qmp_phy_cfg instead of
>> hardcoded lists. This enables per-PHY customization and simplifies
>> initialization logic for USB-only and USB/DP switchable PHYs.
>>
>> Signed-off-by: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
>> ---
>>  drivers/phy/qualcomm/phy-qcom-qmp-usbc.c | 56 ++++++++++++++++++--------------
>>  1 file changed, 31 insertions(+), 25 deletions(-)
>>
>> @@ -1147,11 +1159,6 @@ static int qmp_usbc_parse_dt_legacy(struct qmp_usbc *qmp, struct device_node *np
>>  
>>  	qmp->num_clks = ret;
>>  
>> -	ret = qmp_usbc_reset_init(qmp, usb3phy_legacy_reset_l,
>> -				 ARRAY_SIZE(usb3phy_legacy_reset_l));
> You can not do this, it will break compatibility with the historical
> DTS. Legacy code should continue using the old list of resets.


Ok, then I'll update it, since qmp_usbc_parse_dt_legacy still uses the old
list, and qmp_usbc_parse_dt should use the one from cfg.


>> -	if (ret)
>> -		return ret;
>> -
>>  	return 0;
>>  }
>>