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SubjectRe: [PATCH 2/2] cpufreq: brcmstb-avs-cpufreq: properly retrieve P-state upon suspend
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? I had a quick poke around some trees and did not see it
there.

Thanks,
-Markus

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