Re: [PATCH v2 2/3] arm64: dts: qcom: sm8450: Add opp-level to indicate PCIe data rates

[Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>]

On 8/18/2025 2:32 PM, Viresh Kumar wrote:
> On 18-08-25, 13:52, Krishna Chaitanya Chundru wrote:
>> @@ -2210,45 +2213,67 @@ pcie1_opp_table: opp-table {
>>   				compatible = "operating-points-v2";
>>   
>>   				/* GEN 1 x1 */
>> -				opp-2500000 {
>> +				opp-2500000-1 {
> 
> Why mention -1 here when there is only one entry with this freq value
> ?
> 
>>   					opp-hz = /bits/ 64 <2500000>;
>>   					required-opps = <&rpmhpd_opp_low_svs>;
>>   					opp-peak-kBps = <250000 1>;
>> +					opp-level = <1>;
>>   				};
>>   
>> -				/* GEN 1 x2 and GEN 2 x1 */
>> -				opp-5000000 {
>> +				/* GEN 1 x2 */
>> +				opp-5000000-1 {
>> +					opp-hz = /bits/ 64 <5000000>;
>> +					required-opps = <&rpmhpd_opp_low_svs>;
>> +					opp-peak-kBps = <500000 1>;
>> +					opp-level = <1>;
>> +				};
>> +
>> +				/* GEN 2 x1 */
>> +				opp-5000000-2 {
>>   					opp-hz = /bits/ 64 <5000000>;
>>   					required-opps = <&rpmhpd_opp_low_svs>;
>>   					opp-peak-kBps = <500000 1>;
>> +					opp-level = <2>;
>>   				};
> 
> This looks okay.
> 
>>   
>>   				/* GEN 2 x2 */
>> -				opp-10000000 {
>> +				opp-10000000-2 {
> 
> Why -2 here ?
> 
>>   					opp-hz = /bits/ 64 <10000000>;
>>   					required-opps = <&rpmhpd_opp_low_svs>;
>>   					opp-peak-kBps = <1000000 1>;
>> +					opp-level = <2>;
>>   				};
>>   
>>   				/* GEN 3 x1 */
>> -				opp-8000000 {
>> +				opp-8000000-3 {
> 
> same.
> 
>>   					opp-hz = /bits/ 64 <8000000>;
>>   					required-opps = <&rpmhpd_opp_nom>;
>>   					opp-peak-kBps = <984500 1>;
>> +					opp-level = <3>;
>> +				};
>> +
>> +				/* GEN 3 x2 */
>> +				opp-16000000-3 {
> 
> Shouldn't this be opp-16000000-1 only ? This is the first occurrence
> 16000000.
> 
>> +					opp-hz = /bits/ 64 <16000000>;
>> +					required-opps = <&rpmhpd_opp_nom>;
>> +					opp-peak-kBps = <1969000 1>;
>> +					opp-level = <3>;
>>   				};
>>   
>> -				/* GEN 3 x2 and GEN 4 x1 */
>> -				opp-16000000 {
>> +				/* GEN 4 x1 */
>> +				opp-16000000-4 {
> 
> opp-16000000-2 ?
I tried to add the level as prefix as that will indicate the PCIe date
rate also instead of 1, 2 to make more aligned with the PCIe 
representations. I will update this in the commit text in my next
series.

- Krishna Chaitanya.
>