On 11.04.2023 15:31, Rajendra Nayak wrote:
>
> On 4/11/2023 4:57 PM, Konrad Dybcio wrote:
>>
>>
>> On 11.04.2023 06:56, Rajendra Nayak wrote:
>>>
>>>
>>> On 4/8/2023 7:33 PM, Konrad Dybcio wrote:
>>>>
>>>>
>>>> On 8.04.2023 15:48, Krzysztof Kozlowski wrote:
>>>>> The GCC clock controller needs CX power domain, at least according to
>>>>> DTS:
>>>>>
>>>>> sc7180-trogdor-pompom-r3.dtb: clock-controller@100000: Unevaluated properties are not allowed ('power-domains' was unexpected)
>>>>>
>>>>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
>>>>> ---
>>>> +CC Rajendra (author of 5d6fc6321db1 ("arm64: dts: qcom:
>>>> sc7180: Add required-opps for USB"))
>>>>
>>>> Rajendra, shouldn't SC7180 GCC have PM ops to make sure a vote
>>>> is only there when AP is active?
>> So IIUC, CX is never supposed to be shut down?
>
> Atleast sc7180 and sc7280 do not support full CX shutdown (or power
> collapse as its called), it only transitions to a Retention state
> and even that in the system-wide suspend path only
And won't outstanding votes on that resource prevent the system
from entering a system-wide low power state?
Konrad
>
>>
>> Konrad
>>>
>>> hmm, I am not quite sure why we would want the performance votes
>>> from peripherals dropped when CPUs go down in idle?
>>>
>>>> Are all GDSCs powered by CX?
>>>> If not, wouldn't this also need power-domain-names to
>>>> facilitate e.g. potential MX-powered ones?
>>>
>>> For sc7180 GCC, yes.
>>>
>>>>
>>>> Konrad
>>>>> .../devicetree/bindings/clock/qcom,gcc-sc7180.yaml | 7 +++++++
>>>>> 1 file changed, 7 insertions(+)
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc-sc7180.yaml b/Documentation/devicetree/bindings/clock/qcom,gcc-sc7180.yaml
>>>>> index 06dce0c6b7d0..8bf9b6f49550 100644
>>>>> --- a/Documentation/devicetree/bindings/clock/qcom,gcc-sc7180.yaml
>>>>> +++ b/Documentation/devicetree/bindings/clock/qcom,gcc-sc7180.yaml
>>>>> @@ -32,6 +32,10 @@ properties:
>>>>> - const: bi_tcxo_ao
>>>>> - const: sleep_clk
>>>>> + power-domains:
>>>>> + items:
>>>>> + - description: CX domain
>>>>> +
>>>>> required:
>>>>> - compatible
>>>>> - clocks
>>>>> @@ -45,6 +49,8 @@ unevaluatedProperties: false
>>>>> examples:
>>>>> - |
>>>>> #include <dt-bindings/clock/qcom,rpmh.h>
>>>>> + #include <dt-bindings/power/qcom-rpmpd.h>
>>>>> +
>>>>> clock-controller@100000 {
>>>>> compatible = "qcom,gcc-sc7180";
>>>>> reg = <0x00100000 0x1f0000>;
>>>>> @@ -52,6 +58,7 @@ examples:
>>>>> <&rpmhcc RPMH_CXO_CLK_A>,
>>>>> <&sleep_clk>;
>>>>> clock-names = "bi_tcxo", "bi_tcxo_ao", "sleep_clk";
>>>>> + power-domains = <&rpmhpd SC7180_CX>;
>>>>> #clock-cells = <1>;
>>>>> #reset-cells = <1>;
>>>>> #power-domain-cells = <1>;
