linux.git/drivers/pmdomain/arm, branch v6.7 Linux kernel source tree pmdomain: arm: Avoid polling for scmi_perf_domain 2023-11-27T15:28:20+00:00 Ulf Hansson ulf.hansson@linaro.org 2023-11-27T13:50:33+00:00 0cb19e50a911aaadf49eed120392e429d6e1fa0c It was a mistake to prefer polling based mode when setting a performance level for a domain. Let's instead rely on the protocol to decide what is best and thus avoid polling when possible. Reported-by: Nikunj Kela <nkela@quicinc.com> Fixes: 2af23ceb8624 ("pmdomain: arm: Add the SCMI performance domain") Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Link: https://lore.kernel.org/r/20231127135033.136442-1-ulf.hansson@linaro.org 
It was a mistake to prefer polling based mode when setting a performance
level for a domain. Let's instead rely on the protocol to decide what is
best and thus avoid polling when possible.

Reported-by: Nikunj Kela <nkela@quicinc.com>
Fixes: 2af23ceb8624 ("pmdomain: arm: Add the SCMI performance domain")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20231127135033.136442-1-ulf.hansson@linaro.org
firmware: arm_scmi: Add generic OPP support to the SCMI performance domain 2023-10-06T08:41:03+00:00 Ulf Hansson ulf.hansson@linaro.org 2023-09-25T13:17:15+00:00 0a81b0eb81ca94f2be9712b85c2d1c32542a17b2 To allow a consumer driver to use the OPP library to scale the performance for its device, let's dynamically add the OPP table when the device gets attached to its SCMI performance domain. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Link: https://lore.kernel.org/r/20230925131715.138411-10-ulf.hansson@linaro.org Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> 
To allow a consumer driver to use the OPP library to scale the performance
for its device, let's dynamically add the OPP table when the device gets
attached to its SCMI performance domain.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230925131715.138411-10-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
firmware: arm_scmi: Move power-domain driver to the pmdomain dir 2023-09-21T15:35:14+00:00 Sudeep Holla sudeep.holla@arm.com 2023-09-21T11:24:15+00:00 af78e5c309c4b797168c8ce87c60ca06b26b1e73 To simplify with maintenance let's move the Arm SCMI power-domain driver to the new pmdomain directory. Link: https://lore.kernel.org/all/20230921113328.3208651-1-sudeep.holla@arm.com Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Cc: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> 
To simplify with maintenance let's move the Arm SCMI power-domain driver
to the new pmdomain directory.

Link: https://lore.kernel.org/all/20230921113328.3208651-1-sudeep.holla@arm.com
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
pmdomain: arm: Add the SCMI performance domain 2023-09-21T15:35:14+00:00 Ulf Hansson ulf.hansson@linaro.org 2023-09-19T12:16:05+00:00 2af23ceb8624a419eaf40295c11fcb86ec9ee303 To enable support for performance scaling (DVFS) for generic devices with the SCMI performance protocol, let's add an SCMI performance domain. This is being modelled as a genpd provider, with support for performance scaling through genpd's ->set_performance_state() callback. Note that, this adds the initial support that allows consumer drivers for attached devices, to vote for a new performance state via calling the dev_pm_genpd_set_performance_state(). However, this should be avoided as it's in most cases preferred to use the OPP library to vote for a new OPP instead. The support using the OPP library isn't part of this change, but needs to be implemented from subsequent changes. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Link: https://lore.kernel.org/r/20230919121605.7304-1-ulf.hansson@linaro.org Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> 
To enable support for performance scaling (DVFS) for generic devices with
the SCMI performance protocol, let's add an SCMI performance domain. This
is being modelled as a genpd provider, with support for performance scaling
through genpd's ->set_performance_state() callback.

Note that, this adds the initial support that allows consumer drivers for
attached devices, to vote for a new performance state via calling the
dev_pm_genpd_set_performance_state(). However, this should be avoided as
it's in most cases preferred to use the OPP library to vote for a new OPP
instead. The support using the OPP library isn't part of this change, but
needs to be implemented from subsequent changes.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230919121605.7304-1-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>