From: Sudeep Holla <sudeep.holla@arm.com>
To: Nicola Mazzucato <nicola.mazzucato@arm.com>, viresh.kumar@linaro.org
Cc: linux-pm@vger.kernel.org, rjw@rjwysocki.net,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Sudeep Holla <sudeep.holla@arm.com>,
lukasz.luba@arm.com
Subject: Re: [PATCH 2/2] cpufreq: arm_scmi: Set fast_switch_possible conditionally
Date: Wed, 17 Jun 2020 13:47:53 +0100 [thread overview]
Message-ID: <20200617124753.GA15211@bogus> (raw)
In-Reply-To: <20200617094332.8391-2-nicola.mazzucato@arm.com>
On Wed, Jun 17, 2020 at 10:43:32AM +0100, Nicola Mazzucato wrote:
> Currently the fast_switch_possible flag is set unconditionally
> to true. Based on this, schedutil does not create a
> thread for frequency switching and would always use the
> fast switch path.
> However, if the platform does not support frequency
> fast switch, this may cause the governor to attempt an
> operation that is not supported by the platform.
>
> Fix this by correctly retrieve the fast_switch capability
> from the driver which knows if the platform can support
> this feature.
>
Hi Viresh,
This is first step towards avoiding polling based cpufreq set if firmware
has fast access registers that bypass normal mailbox based messaging.
If you happy with this and provide ack, I will take this along with scmi
changes via ARM SoC. Hope that is fine by you.
--
Regards,
Sudeep
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next prev parent reply other threads:[~2020-06-17 12:48 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 22:03 [PATCH] firmware: arm_scmi: Fix SCMI Generic Power Domain probing Cristian Marussi
2020-07-03 14:49 ` Sudeep Holla
2020-07-01 15:53 ` [PATCH v11 0/9] SCMI Notifications Core Support Cristian Marussi
2020-07-01 15:53 ` [PATCH v11 1/9] firmware: arm_scmi: Add notification protocol-registration Cristian Marussi
2020-07-01 15:53 ` [PATCH v11 2/9] firmware: arm_scmi: Add notification callbacks-registration Cristian Marussi
2020-07-01 15:53 ` [PATCH v11 3/9] firmware: arm_scmi: Add notification dispatch and delivery Cristian Marussi
2020-07-01 15:53 ` [PATCH v11 4/9] firmware: arm_scmi: Enable notification core Cristian Marussi
2020-07-01 15:53 ` [PATCH v11 5/9] firmware: arm_scmi: Add power notifications support Cristian Marussi
2020-07-01 15:53 ` [PATCH v11 6/9] firmware: arm_scmi: Add perf " Cristian Marussi
2020-07-01 15:53 ` [PATCH v11 7/9] firmware: arm_scmi: Add sensor " Cristian Marussi
2020-07-01 15:53 ` [PATCH v11 8/9] firmware: arm_scmi: Add reset " Cristian Marussi
2020-07-01 15:53 ` [PATCH v11 9/9] firmware: arm_scmi: Add base " Cristian Marussi
2020-07-03 14:49 ` [PATCH v11 0/9] SCMI Notifications Core Support Sudeep Holla
2020-06-17 9:43 ` [PATCH 1/2] firmware: arm_scmi: Add fast_switch_possible() api Nicola Mazzucato
2020-06-17 9:43 ` [PATCH 2/2] cpufreq: arm_scmi: Set fast_switch_possible conditionally Nicola Mazzucato
2020-06-17 12:47 ` Sudeep Holla [this message]
2020-06-18 6:14 ` Viresh Kumar
2020-06-18 8:08 ` Sudeep Holla
2020-06-18 9:54 ` Viresh Kumar
2020-07-03 14:49 ` [PATCH 1/2] firmware: arm_scmi: Add fast_switch_possible() api Sudeep Holla
2020-06-25 10:19 ` [PATCH] firmware: arm_scmi: Use HAVE_ARM_SMCCC_DISCOVERY instead of ARM_PSCI_FW Sudeep Holla
2020-07-03 14:49 ` Sudeep Holla
2020-06-09 13:45 ` [PATCH] firmware: arm_scmi: Use signed integer to report transfer status Sudeep Holla
2020-06-09 14:00 ` Lukasz Luba
2020-07-03 14:49 ` Sudeep Holla
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