Messages in this thread Patch in this message | | | From | Viresh Kumar <> | Subject | [PATCH 3/3] OPP: Allow platforms to add a set_required_opps() callback | Date | Wed, 22 Feb 2023 16:36:39 +0530 |
| |
We currently configure required-opps only for genpds, as we aren't really sure what's required of the other use cases. This patch allows platforms to add their own set_required_opps() helper.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
--- Jun,
I think this can replace the cpufreq notification from the devfreq driver (get_target_freq_with_cpufreq()), which is used currently only by mtk-cci-devfreq.c. Instead of the notification, the aggregation of the requests for the devfreq device can be done within this callback.
What do you say ? --- drivers/opp/core.c | 35 +++++++++++++++++++++++++++++++++++ drivers/opp/opp.h | 4 ++-- include/linux/pm_opp.h | 5 +++++ 3 files changed, 42 insertions(+), 2 deletions(-)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 954c94865cf5..22985ad7af79 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -2421,8 +2421,35 @@ static void _opp_detach_genpd(struct opp_table *opp_table) mutex_unlock(&opp_table->genpd_virt_dev_lock); } +/** + * _opp_set_required_opps_helper() - Register custom set required opps helper. + * @dev: Device for which the helper is getting registered. + * @set_required_opps: Custom set required opps helper. + * + * This must be called before any OPPs are initialized for the device. + */ +static void _opp_set_required_opps_helper(struct opp_table *opp_table, + set_required_opps_t set_required_opps) +{ + opp_table->set_required_opps = set_required_opps; +} + +/** + * _opp_put_required_opps_helper() - Releases resources blocked for + * required opps helper. + * @opp_table: OPP table returned from _opp_set_required_opps_helper(). + * + * Release resources blocked for platform specific required opps helper. + */ +static void _opp_put_required_opps_helper(struct opp_table *opp_table) +{ + opp_table->set_required_opps = NULL; +} + static void _opp_clear_config(struct opp_config_data *data) { + if (data->flags & OPP_CONFIG_REQUIRED_OPPS) + _opp_put_required_opps_helper(data->opp_table); if (data->flags & OPP_CONFIG_GENPD) _opp_detach_genpd(data->opp_table); if (data->flags & OPP_CONFIG_REGULATOR) @@ -2546,6 +2573,14 @@ int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config) data->flags |= OPP_CONFIG_GENPD; } + /* Required opps helper */ + if (config->set_required_opps) { + _opp_set_required_opps_helper(opp_table, + config->set_required_opps); + + data->flags |= OPP_CONFIG_REQUIRED_OPPS; + } + ret = xa_alloc(&opp_configs, &id, data, XA_LIMIT(1, INT_MAX), GFP_KERNEL); if (ret) diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h index 2a057c42ddf4..54cfeb894f5d 100644 --- a/drivers/opp/opp.h +++ b/drivers/opp/opp.h @@ -35,6 +35,7 @@ extern struct list_head opp_tables, lazy_opp_tables; #define OPP_CONFIG_PROP_NAME BIT(3) #define OPP_CONFIG_SUPPORTED_HW BIT(4) #define OPP_CONFIG_GENPD BIT(5) +#define OPP_CONFIG_REQUIRED_OPPS BIT(6) /** * struct opp_config_data - data for set config operations @@ -235,8 +236,7 @@ struct opp_table { bool enabled; bool genpd_performance_state; bool is_genpd; - int (*set_required_opps)(struct device *dev, - struct opp_table *opp_table, struct dev_pm_opp *opp, bool scaling_down); + set_required_opps_t set_required_opps; #ifdef CONFIG_DEBUG_FS struct dentry *dentry; diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index dc1fb5890792..5a8c0cc50c96 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -64,6 +64,9 @@ typedef int (*config_regulators_t)(struct device *dev, typedef int (*config_clks_t)(struct device *dev, struct opp_table *opp_table, struct dev_pm_opp *opp, void *data, bool scaling_down); +typedef int (*set_required_opps_t)(struct device *dev, struct opp_table *opp_table, + struct dev_pm_opp *opp, bool scaling_down); + /** * struct dev_pm_opp_config - Device OPP configuration values * @clk_names: Clk names, NULL terminated array. @@ -76,6 +79,7 @@ typedef int (*config_clks_t)(struct device *dev, struct opp_table *opp_table, * @genpd_names: Null terminated array of pointers containing names of genpd to * attach. * @virt_devs: Pointer to return the array of virtual devices. + * @set_required_opps: Custom set required opps helper. * * This structure contains platform specific OPP configurations for the device. */ @@ -90,6 +94,7 @@ struct dev_pm_opp_config { const char * const *regulator_names; const char * const *genpd_names; struct device ***virt_devs; + set_required_opps_t set_required_opps; }; #if defined(CONFIG_PM_OPP) -- 2.31.1.272.g89b43f80a514
| |