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SubjectRe: [PATCH v4 2/3] PM / EM: Expose perf domain struct
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On 15/05/2019 13:01, Quentin Perret wrote:
> On Wednesday 15 May 2019 at 12:51:57 (+0200), Daniel Lezcano wrote:
>> On 15/05/2019 12:46, Quentin Perret wrote:
>>> On Wednesday 15 May 2019 at 11:40:44 (+0100), Quentin Perret wrote:
>>
>> [ ... ]
>>
>>>> +#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
>>>> if (capacitance) {
>>>> ret = update_freq_table(cpufreq_cdev, capacitance);
>>>> if (ret) {
>>>> cdev = ERR_PTR(ret);
>>>> goto remove_ida;
>>>> }
>>>> -
>>>> - cooling_ops = &cpufreq_power_cooling_ops;
>>>> - } else {
>>>> - cooling_ops = &cpufreq_cooling_ops;
>>>> }
>>>> +#endif
>>>> + cooling_ops = &cpufreq_cooling_ops;
>>>
>>> Argh, that is actually broken with !capacitance and
>>> THERMAL_GOV_POWER_ALLOCATOR=y ... Perhaps it's best to keep the two
>>> thermal_cooling_device_ops struct separated in the end.
>>
>> Or alternatively you can keep one structure but instead of filling the
>> state2power,power2state and getrequestedpower fields in the declaration,
>> you fill them in the if (capacitance) block, no?
>
> Something like the below ? Yes, that works too. I'll write a proper
> patch and send that next week or so.

Yes, exactly. And IMHO, that helps for the understanding of code also.

> --->8---
>
> /* Bind cpufreq callbacks to thermal cooling device ops */
>
> static struct thermal_cooling_device_ops cpufreq_cooling_ops = {
> - .get_max_state = cpufreq_get_max_state,
> - .get_cur_state = cpufreq_get_cur_state,
> - .set_cur_state = cpufreq_set_cur_state,
> -};
> -
> -static struct thermal_cooling_device_ops cpufreq_power_cooling_ops = {
> .get_max_state = cpufreq_get_max_state,
> .get_cur_state = cpufreq_get_cur_state,
> .set_cur_state = cpufreq_set_cur_state,
> - .get_requested_power = cpufreq_get_requested_power,
> - .state2power = cpufreq_state2power,
> - .power2state = cpufreq_power2state,
> };
>
> /* Notifier for cpufreq policy change */
> @@ -674,18 +667,19 @@ __cpufreq_cooling_register(struct device_node *np,
> pr_debug("%s: freq:%u KHz\n", __func__, freq);
> }
>
> + cooling_ops = &cpufreq_cooling_ops;
> +#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
> if (capacitance) {
> ret = update_freq_table(cpufreq_cdev, capacitance);
> if (ret) {
> cdev = ERR_PTR(ret);
> goto remove_ida;
> }
> -
> - cooling_ops = &cpufreq_power_cooling_ops;
> - } else {
> - cooling_ops = &cpufreq_cooling_ops;
> + cooling_ops->get_requested_power = cpufreq_get_requested_power;
> + cooling_ops->state2power = cpufreq_state2power;
> + cooling_ops->power2state = cpufreq_power2state;
> }
> -
> +#endif
> cdev = thermal_of_cooling_device_register(np, dev_name, cpufreq_cdev,
> cooling_ops);
> if (IS_ERR(cdev))
>


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