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SubjectRe: [PATCH v2 2/3] soc: qcom: rpmhpd: Remove mx/cx relationship on sc7280
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On 12/9/2021 2:12 AM, Bjorn Andersson wrote:
> On Tue 07 Dec 04:08 CST 2021, Rajendra Nayak wrote:
>
>> While the requirement to specify the active + sleep and active-only MX
>> power-domains as the parents of the corresponding CX power domains is
>> applicable for most SoCs, we have some like the sc7280 where this
>> dependency is not applicable.
>> Define new rpmhpd structs for cx and cx_ao without the mx as
>> parent and use them for sc7280.
>>
>> Signed-off-by: Rajendra Nayak <quic_rjendra@quicinc.com>
>> ---
>> drivers/soc/qcom/rpmhpd.c | 18 ++++++++++++++++--
>> 1 file changed, 16 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c
>> index c71481d..4599efe 100644
>> --- a/drivers/soc/qcom/rpmhpd.c
>> +++ b/drivers/soc/qcom/rpmhpd.c
>> @@ -120,6 +120,20 @@ static struct rpmhpd cx_ao = {
>> .res_name = "cx.lvl",
>> };
>>
>> +static struct rpmhpd cx_ao_no_parent;
>> +static struct rpmhpd cx_no_parent = {
>
> There are multiple variations of how each of these can be parented, but
> only one way they can be without a parent. So how about we turn this the
> other way around?
>
> I.e. let's name this one "cx" and the existing one "cx_w_mx_parent".
>
>
> This will be particularly useful when you look at mmcx, which on
> 8150/8180 has mx as parent and on 8450 has cx as parent.
>
>
> PS. Unfortunately I had merged 8450 since you wrote this series, I tried
> to just fix it up as I applied your patch, but noticed 8450_cx and
> 8450_mmcx and wanted to get your opinion on this first.

I agree that sounds like a reasonable thing to do, I hadn't looked at 8450
so did not notice it, I will rebase my patches on top and repost.

>
> Regards,
> Bjorn
>
>> + .pd = { .name = "cx", },
>> + .peer = &cx_ao_no_parent,
>> + .res_name = "cx.lvl",
>> +};
>> +
>> +static struct rpmhpd cx_ao_no_parent = {
>> + .pd = { .name = "cx_ao", },
>> + .active_only = true,
>> + .peer = &cx_no_parent,
>> + .res_name = "cx.lvl",
>> +};
>> +
>> static struct rpmhpd mmcx_ao;
>> static struct rpmhpd mmcx = {
>> .pd = { .name = "mmcx", },
>> @@ -273,8 +287,8 @@ static const struct rpmhpd_desc sc7180_desc = {
>>
>> /* SC7280 RPMH powerdomains */
>> static struct rpmhpd *sc7280_rpmhpds[] = {
>> - [SC7280_CX] = &cx,
>> - [SC7280_CX_AO] = &cx_ao,
>> + [SC7280_CX] = &cx_no_parent,
>> + [SC7280_CX_AO] = &cx_ao_no_parent,
>> [SC7280_EBI] = &ebi,
>> [SC7280_GFX] = &gfx,
>> [SC7280_MX] = &mx,
>> --
>> 2.7.4
>>

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