lkml.org 
[lkml]   [2017]   [Feb]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 2/2] cpufreq: brcmstb-avs-cpufreq: properly retrieve P-state upon suspend
On 1 February 2017 at 15:44, Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
> On Tuesday, January 31, 2017 10:53:01 AM Markus Mayer wrote:
>> On 5 January 2017 at 20:11, Viresh Kumar <viresh.kumar@linaro.org> wrote:
>> > On 19-12-16, 12:10, Markus Mayer wrote:
>> >> From: Markus Mayer <mmayer@broadcom.com>
>> >>
>> >> The AVS GET_PMAP command does return a P-state along with the P-map
>> >> information. However, that P-state is the initial P-state when the
>> >> P-map was first downloaded to AVS. It is *not* the current P-state.
>> >>
>> >> Therefore, we explicitly retrieve the P-state using the GET_PSTATE
>> >> command.
>> >>
>> >> Signed-off-by: Markus Mayer <mmayer@broadcom.com>
>> >> ---
>> >> drivers/cpufreq/brcmstb-avs-cpufreq.c | 13 ++++++++++++-
>> >> 1 file changed, 12 insertions(+), 1 deletion(-)
>> >>
>> >> diff --git a/drivers/cpufreq/brcmstb-avs-cpufreq.c b/drivers/cpufreq/brcmstb-avs-cpufreq.c
>> >> index 2c6e325..c943606 100644
>> >> --- a/drivers/cpufreq/brcmstb-avs-cpufreq.c
>> >> +++ b/drivers/cpufreq/brcmstb-avs-cpufreq.c
>> >> @@ -784,8 +784,19 @@ static int brcm_avs_target_index(struct cpufreq_policy *policy,
>> >> static int brcm_avs_suspend(struct cpufreq_policy *policy)
>> >> {
>> >> struct private_data *priv = policy->driver_data;
>> >> + int ret;
>> >> +
>> >> + ret = brcm_avs_get_pmap(priv, &priv->pmap);
>> >> + if (ret)
>> >> + return ret;
>> >>
>> >> - return brcm_avs_get_pmap(priv, &priv->pmap);
>> >> + /*
>> >> + * We can't use the P-state returned by brcm_avs_get_pmap(), since
>> >> + * that's the initial P-state from when the P-map was downloaded to the
>> >> + * AVS co-processor, not necessarily the P-state we are running at now.
>> >> + * So, we get the current P-state explicitly.
>> >> + */
>> >> + return brcm_avs_get_pstate(priv, &priv->pmap.state);
>> >> }
>> >>
>> >> static int brcm_avs_resume(struct cpufreq_policy *policy)
>> >
>> > Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
>>
>> Just wanted to follow up to see if this has been or will be picked up
>> for 4.10?
>
> For 4.10? No way.

I was only thinking 4.10, because it's a fix for an existing driver.
But I am not complaining if it goes into 4.11.

>> I had a quick poke around some trees and did not see it
>> there.
>
> I'm not sure which trees you checked, but it is there in my linux-next branch.

Clearly, I didn't check there, my apologies.

Regards,
-Markus

\
 
 \ /
  Last update: 2017-02-02 01:00    [W:0.051 / U:1.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site