On 19-11-24, 18:56, Neil Armstrong wrote:
> Add and implement the dev_pm_opp_get_bw() to retrieve
> the OPP's bandwidth in the same way as the dev_pm_opp_get_voltage()
> helper.
>
> Retrieving bandwidth is required in the case of the Adreno GPU
> where the GPU Management Unit can handle the Bandwidth scaling.
>
> The helper can get the peak or average bandwidth for any of
> the interconnect path.
>
> Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
> ---
> drivers/opp/core.c | 25 +++++++++++++++++++++++++
> include/linux/pm_opp.h | 7 +++++++
> 2 files changed, 32 insertions(+)
>
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index 494f8860220d97fc690ebab5ed3b7f5f04f22d73..864b9b99b0129acaffaf45c584c5f34b8bababed 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -106,6 +106,31 @@ static bool assert_single_clk(struct opp_table *opp_table)
> return !WARN_ON(opp_table->clk_count > 1);
> }
>
> +/**
> + * dev_pm_opp_get_bw() - Gets the bandwidth corresponding to an opp
> + * @opp: opp for which voltage has to be returned for
bandwidth
> + * @peak: select peak or average bandwidth
> + * @index: bandwidth index
> + *
> + * Return: bandwidth in kBps, else return 0
> + */
> +unsigned long dev_pm_opp_get_bw(struct dev_pm_opp *opp, bool peak, int index)
> +{
> + if (IS_ERR_OR_NULL(opp)) {
> + pr_err("%s: Invalid parameters\n", __func__);
> + return 0;
> + }
> +
> + if (index > opp->opp_table->path_count)
> + return 0;
> +
> + if (!opp->bandwidth)
> + return 0;
> +
> + return peak ? opp->bandwidth[index].peak : opp->bandwidth[index].avg;
> +}
> +EXPORT_SYMBOL_GPL(dev_pm_opp_get_bw);
> +
> /**
> * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp
> * @opp: opp for which voltage has to be returned for
> diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
> index 6424692c30b71fca471a1b7d63e018605dd9324b..cd9a257b8e7766d6c8631351a10a845c88414a74 100644
> --- a/include/linux/pm_opp.h
> +++ b/include/linux/pm_opp.h
> @@ -106,6 +106,8 @@ struct dev_pm_opp_data {
> struct opp_table *dev_pm_opp_get_opp_table(struct device *dev);
> void dev_pm_opp_put_opp_table(struct opp_table *opp_table);
>
> +unsigned long dev_pm_opp_get_bw(struct dev_pm_opp *opp, bool peak, int index);
> +
> unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
>
> int dev_pm_opp_get_supplies(struct dev_pm_opp *opp, struct dev_pm_opp_supply *supplies);
> @@ -209,6 +211,11 @@ static inline struct opp_table *dev_pm_opp_get_opp_table_indexed(struct device *
>
> static inline void dev_pm_opp_put_opp_table(struct opp_table *opp_table) {}
>
> +static inline unsigned long dev_pm_opp_get_bw(struct dev_pm_opp *opp, bool peak, int index)
> +{
> + return 0;
> +}
> +
> static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
> {
> return 0;
Applied. Thanks.
--
viresh
