linux-kernel - Re: [PATCH 2/3] interconnect: qcom: sa8775p: enable QoS configuration

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Message-ID: <c783b319-3b88-45b0-8a0c-8c3ba9c462af@oss.qualcomm.com>
Date: Tue, 12 Aug 2025 15:55:27 +0530
From: Odelu Kukatla <odelu.kukatla@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Georgi Djakov <djakov@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Raviteja Laggyshetty <quic_rlaggysh@...cinc.com>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mike Tipton <mike.tipton@....qualcomm.com>
Subject: Re: [PATCH 2/3] interconnect: qcom: sa8775p: enable QoS configuration



On 8/9/2025 1:05 PM, Dmitry Baryshkov wrote:
> On Fri, Aug 08, 2025 at 07:32:59PM +0530, Odelu Kukatla wrote:
>> Enable QoS configuration for master ports with predefined
>> priority and urgency forwarding.
>>
>> Signed-off-by: Odelu Kukatla <odelu.kukatla@....qualcomm.com>
>> ---
>>  drivers/interconnect/qcom/sa8775p.c | 439 ++++++++++++++++++++++++++++
>>  1 file changed, 439 insertions(+)
>>
>> diff --git a/drivers/interconnect/qcom/sa8775p.c b/drivers/interconnect/qcom/sa8775p.c
>> index 04b4abbf4487..5bf27dbe818d 100644
>> --- a/drivers/interconnect/qcom/sa8775p.c
>> +++ b/drivers/interconnect/qcom/sa8775p.c
>> @@ -213,6 +213,13 @@ static struct qcom_icc_node qxm_qup3 = {
>>  	.name = "qxm_qup3",
>>  	.channels = 1,
>>  	.buswidth = 8,
>> +	.qosbox = &(const struct qcom_icc_qosbox) {
> 
> Please follow the design on milos / sar2130p / sm8650 and add a separate
> struct instance outside of qcom_icc_node.
> 
> LGTM otherwise
> 
Thanks Dmitry for the review!

We discussed this during patch https://patchwork.kernel.org/project/linux-pm/patch/20240306073016.2163-3-quic_okukatla@quicinc.com/#25749420, 
it was decided to follow embedded structure notation for QoS as per comment for sc7280.>> +		.num_ports = 1,
>> +		.port_offsets = { 0x11000 },
>> +		.prio_fwd_disable = 1,
>> +		.prio = 2,
>> +		.urg_fwd = 0,
>> +	},
>>  	.num_links = 1,
>>  	.link_nodes = (struct qcom_icc_node *[]) { &qns_a1noc_snoc },
>>  };
>