linux-kernel - Re: [PATCH v4 4/5] arm64: dts: sdm845: Add OPP tables and power-domains for venus

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Date:   Fri, 24 Jul 2020 17:09:48 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     Rajendra Nayak <rnayak@...eaurora.org>, robh+dt@...nel.org,
        agross@...nel.org, bjorn.andersson@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        mka@...omium.org
Subject: Re: [PATCH v4 4/5] arm64: dts: sdm845: Add OPP tables and
 power-domains for venus

Hi,

On 7/23/20 9:06 PM, Stanimir Varbanov wrote:
> Hi Rajendra,
> 
> After applying 2,3 and 4/5 patches on linaro-integration v5.8-rc2 I see
> below messages on db845:
> 
> qcom-venus aa00000.video-codec: dev_pm_opp_set_rate: failed to find
> current OPP for freq 533000097 (-34)
> 
> ^^^ This one is new.
> 
> qcom_rpmh TCS Busy, retrying RPMH message send: addr=0x30000
> 
> ^^^ and this message is annoying, can we make it pr_debug in rpmh?
> 
> On 7/23/20 2:26 PM, Rajendra Nayak wrote:
>> Add the OPP tables in order to be able to vote on the performance state of
>> a power-domain.
>>
>> Signed-off-by: Rajendra Nayak <rnayak@...eaurora.org>
>> ---
>>  arch/arm64/boot/dts/qcom/sdm845.dtsi | 40 ++++++++++++++++++++++++++++++++++--
>>  1 file changed, 38 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
>> index e506793..5ca2265 100644
>> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
>> @@ -3631,8 +3631,10 @@
>>  			interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
>>  			power-domains = <&videocc VENUS_GDSC>,
>>  					<&videocc VCODEC0_GDSC>,
>> -					<&videocc VCODEC1_GDSC>;
>> -			power-domain-names = "venus", "vcodec0", "vcodec1";
>> +					<&videocc VCODEC1_GDSC>,
>> +					<&rpmhpd SDM845_CX>;
>> +			power-domain-names = "venus", "vcodec0", "vcodec1", "cx";
>> +			operating-points-v2 = <&venus_opp_table>;
>>  			clocks = <&videocc VIDEO_CC_VENUS_CTL_CORE_CLK>,
>>  				 <&videocc VIDEO_CC_VENUS_AHB_CLK>,
>>  				 <&videocc VIDEO_CC_VENUS_CTL_AXI_CLK>,
>> @@ -3654,6 +3656,40 @@
>>  			video-core1 {
>>  				compatible = "venus-encoder";
>>  			};
>> +
>> +			venus_opp_table: venus-opp-table {
>> +				compatible = "operating-points-v2";
>> +
>> +				opp-100000000 {
>> +					opp-hz = /bits/ 64 <100000000>;
>> +					required-opps = <&rpmhpd_opp_min_svs>;
>> +				};
>> +
>> +				opp-200000000 {
>> +					opp-hz = /bits/ 64 <200000000>;
>> +					required-opps = <&rpmhpd_opp_low_svs>;
>> +				};
>> +
>> +				opp-320000000 {
>> +					opp-hz = /bits/ 64 <320000000>;
>> +					required-opps = <&rpmhpd_opp_svs>;
>> +				};
>> +
>> +				opp-380000000 {
>> +					opp-hz = /bits/ 64 <380000000>;
>> +					required-opps = <&rpmhpd_opp_svs_l1>;
>> +				};
>> +
>> +				opp-444000000 {
>> +					opp-hz = /bits/ 64 <444000000>;
>> +					required-opps = <&rpmhpd_opp_nom>;
>> +				};
>> +
>> +				opp-533000000 {
>> +					opp-hz = /bits/ 64 <533000000>;

Actually it comes from videocc, where ftbl_video_cc_venus_clk_src
defines 533000000 but the real calculated freq is 533000097.

If I change to opp-hz = /bits/ 64 <533000097> the error disappear.

I guess we have to revisit m/n and/or pre-divider for this freq when the
source pll is P_VIDEO_PLL0_OUT_MAIN PLL?

>> +					required-opps = <&rpmhpd_opp_turbo>;
>> +				};
>> +			};
>>  		};
>>  
>>  		videocc: clock-controller@...0000 {
>>
> 

-- 
regards,
Stan