linux-kernel - Re: [PATCH v3 09/14] phy: qcom: qmp-usbc: Add DP PHY ops for USB/DP switchable Type-C PHYs

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Message-ID: <9bf7f51b-dcfb-4ff8-848e-dcf144936f2e@oss.qualcomm.com>
Date: Wed, 27 Aug 2025 20:17:39 +0800
From: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: 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>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>, Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org, fange.zhang@....qualcomm.com,
        yongxing.mou@....qualcomm.com, tingwei.zhang@....qualcomm.com,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, quic_lliu6@...cinc.com
Subject: Re: [PATCH v3 09/14] phy: qcom: qmp-usbc: Add DP PHY ops for USB/DP
 switchable Type-C PHYs


On 8/20/2025 7:45 PM, Dmitry Baryshkov wrote:
> On Wed, Aug 20, 2025 at 05:34:51PM +0800, Xiangxu Yin wrote:
>> Define qmp_usbc_dp_phy_ops struct to support DP mode on USB/DP
>> switchable PHYs.
>>
>> Signed-off-by: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
>> ---
>>  drivers/phy/qualcomm/phy-qcom-qmp-usbc.c | 163 +++++++++++++++++++++++++++++++
>>  1 file changed, 163 insertions(+)
>>
>> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-usbc.c b/drivers/phy/qualcomm/phy-qcom-qmp-usbc.c
>> index 1508a4a5f57aff85318485b79528325f28a825a4..a1495a2029cf038bb65c36e42d0a4f633e544558 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-qmp-usbc.c
>> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-usbc.c
>> @@ -22,6 +22,8 @@
>>  #include <linux/slab.h>
>>  #include <linux/usb/typec.h>
>>  #include <linux/usb/typec_mux.h>
>> +#include <dt-bindings/phy/phy-qcom-qmp.h>
>> +#include <drm/bridge/aux-bridge.h>
> This one is not necessary yet


Ok, will remove unnecessary aux-bridge related part.


>>  
>>  #include "phy-qcom-qmp-common.h"
>>  
> [...]
>
>>  static const struct phy_ops qmp_usbc_usb_phy_ops = {
>>  	.init		= qmp_usbc_usb_enable,
>>  	.exit		= qmp_usbc_usb_disable,
>> @@ -1095,6 +1248,16 @@ static const struct phy_ops qmp_usbc_usb_phy_ops = {
>>  	.owner		= THIS_MODULE,
>>  };
>>  
>> +static const struct phy_ops qmp_usbc_dp_phy_ops = {
> Please try restructuring your patches so that there are no unused
> warnings in the middle of the series. You can split the next patch into
> 'parse' and 'enable' parts, then squash this patch into the 'enable'
> one.


You mean it's better to define and register new functions in the same patch 

where they're first used, to avoid unused warnings? And for things like parse_dt and phy_ops,

it's fine to split them into separate patches if each part is used right away?


>
>> +	.init		= qmp_usbc_dp_enable,
>> +	.exit		= qmp_usbc_dp_disable,
>> +	.configure	= qmp_usbc_dp_configure,
>> +	.calibrate	= qmp_usbc_dp_calibrate,
>> +	.power_on	= qmp_usbc_dp_power_on,
>> +	.power_off	= qmp_usbc_dp_power_off,
>> +	.owner		= THIS_MODULE,
>> +};
>> +
>>  static void qmp_usbc_enable_autonomous_mode(struct qmp_usbc *qmp)
>>  {
>>  	const struct qmp_phy_cfg *cfg = qmp->cfg;
>>
>> -- 
>> 2.34.1
>>