On Wed, 2021-05-26 at 12:08 +0900, Chanwoo Choi wrote:

Hi,
On 5/26/21 11:22 AM, andrew-sh.cheng wrote:

quoted

On Thu, 2021-04-08 at 11:47 +0900, Chanwoo Choi wrote:

quoted

On 4/1/21 9:16 AM, Chanwoo Choi wrote:

quoted

On 3/31/21 10:03 PM, andrew-sh.cheng wrote:

quoted

On Wed, 2021-03-31 at 17:35 +0900, Chanwoo Choi wrote:

quoted

On 3/31/21 5:27 PM, Chanwoo Choi wrote:

quoted

Hi,

On 3/31/21 5:03 PM, andrew-sh.cheng wrote:

quoted

On Thu, 2021-03-25 at 17:14 +0900, Chanwoo Choi wrote:

quoted

Hi,

You are missing to add these patches to linux-pm mailing list.
Need to send them to linu-pm ML.

Also, before received this series, I tried to clean-up these patches
on testing branch[1]. So that I add my comment with my clean-up case.
[1] https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git/log/?h=devfreq-testing-passive-gov__;!!CTRNKA9wMg0ARbw!zIrzeDp9vPnm1_SDzVPuzqdHn3zWie9DnfBXaA-j9-CSrVc6aR9_rJQQiw81_CgAPh9XRRs$ 

And 'Saravana Kannan [off-list ref]' is wrong email address.
Please update the email or drop this email.

Hi Chanwoo,

Thank you for the advices.
I will resend patch v9 (add to linux-pm ML), remove this patch, and note
that my patch set base on
https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git/log/?h=devfreq-testing-passive-gov__;!!CTRNKA9wMg0ARbw!yUlsuxrL5PcbF7o6A9DlCfvoA6w8V8VXKjYIybYyiJg3D0HM-lI2xRuxLUV6b3UJ8WFhg_g$ 

I has not yet test this patch[1] on devfreq-testing-passive-gov branch.
So that if possible, I'd like you to test your patches with this patch[1] 
and then if there is no problem, could you send the next patches with patch[1]?

[1]https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git/commit/?h=devfreq-testing-passive-gov&id=39c80d11a8f42dd63ecea1e0df595a0ceb83b454__;!!CTRNKA9wMg0ARbw!yUlsuxrL5PcbF7o6A9DlCfvoA6w8V8VXKjYIybYyiJg3D0HM-lI2xRuxLUV6b3UJR2cQqZs$ 

Sorry for the confusion. I make the devfreq-testing-passive-gov[1]
branch based on latest devfreq-next branch.
[1] https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git/log/?h=devfreq-testing-passive-gov__;!!CTRNKA9wMg0ARbw!yUlsuxrL5PcbF7o6A9DlCfvoA6w8V8VXKjYIybYyiJg3D0HM-lI2xRuxLUV6b3UJ8WFhg_g$ 

First of all, if possible, I want to test them[1] with your patches in this series.
And then if there are no any problem, please let me know. After confirmed from you,
I'll send the patches of devfreq-testing-passive-gov[1] branch.
How about that?

Hi Chanwoo~

We will use this on Google Chrome project.
Google Hsin-Yi has test your patch + my patch set v8 [2~8]

    make sure cci devfreqs runs with cpufreq.
    suspend resume
    speedometer2 benchmark
It is okay.

Please send the patches of devfreq-testing-passive-gov[1] branch.

I will send patch v9 base on yours latter.

Thanks for your test. I'll send the patches today.

I'm sorry for delay because when I tested the patches
for devfreq parent type on Odroid-xu3, there are some problem
related to lazy linking of OPP. So I'm trying to analyze them.
Unfortunately, we need to postpone these patches to next linux
version.

Hi Chanwoo Choi~

It is said that you are busy on another task recently.
May I know your plan on this patch?
Thank you.

Sorry for late work. I have a question.
When I tested exynos-bus.c with adding the 'required-opp' property
on odroid-xu3 board. I got some fail about 

When calling _set_required_opps(), always _set_required_opp() returns
-EBUSY error because of following lazy linking case[1].

[1] https://urldefense.com/v3/__https://elixir.bootlin.com/linux/v5.13-rc3/source/drivers/opp/core.c*L896__;Iw!!CTRNKA9wMg0ARbw!3eNxwDZRy-Ev5BHGxT-BxCz4qrNy0NZohQuBGW36krkwOkl_WX8yBmxlqSk9hxp_kxspMJI$ 

/* required-opps not fully initialized yet */
if (lazy_linking_pending(opp_table))
	return -EBUSY;  


For calling dev_pm_opp_of_add_table(), lazy_link_required_opp_table() function
will be called. But, there is constraint[2]. If is_genpd of opp_table is false,
driver/opp/of.c cannot resolve the lazy linking issue.

[2]  https://urldefense.com/v3/__https://elixir.bootlin.com/linux/v5.13-rc3/source/drivers/opp/of.c*L386__;Iw!!CTRNKA9wMg0ARbw!3eNxwDZRy-Ev5BHGxT-BxCz4qrNy0NZohQuBGW36krkwOkl_WX8yBmxlqSk9hxp_QFUVY9E$ 

/* Link required OPPs for all OPPs of the newly added OPP table */
static void lazy_link_required_opp_table(struct opp_table *new_table)
{
	struct opp_table *opp_table, *temp, **required_opp_tables;
	struct device_node *required_np, *opp_np, *required_table_np;
	struct dev_pm_opp *opp;
	int i, ret;

	/*
	 * We only support genpd's OPPs in the "required-opps" for now,
	 * as we don't know much about other cases.
	 */
	if (!new_table->is_genpd)
		return;

Even if this case, there are no problem on your test case?

Hi Chanwoo~
Sorry for late reply.
Yes, we meet similar issue.
Google member Hsin-Yi had helped deal with this issue on Chrome project.

Patch segment:
@ /drivers/opp/of.c

/* Link required OPPs for all OPPs of the newly added OPP table */
static void lazy_link_required_opp_table(struct opp_table *new_table)
{
	struct opp_table *opp_table, *temp, **required_opp_tables;
	struct device_node *required_np, *opp_np, *required_table_np;
	struct dev_pm_opp *opp;
	int i, ret;

+	/*
+	 * We only support genpd's OPPs in the "required-opps" for now,
+	 * as we don't know much about other cases.
+	 */
+	if (!new_table->is_genpd)
+		return;


Hsin-Yi replied this issue in the discussion list in the original lazy
link thread:
https://patchwork.kernel.org/project/linux-pm/patch/20190717222340.137578-4-saravanak@google.com/#23932203

Loop Hsin-YI here.
You can discuss with her if needing more detail.

Thank you both.
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