On 06-12-19, 16:24, Saravana Kannan wrote:
> The frequency OPP tables have helper functions to search for entries in the
> table based on frequency and get the frequency values for a given (or
> suspend) OPP entry.
>
> Add similar helper functions for bandwidth OPP tables to search for entries
> in the table based on peak bandwidth and to get the peak and average
> bandwidth for a given (or suspend) OPP entry.
>
> Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
> ---
> drivers/opp/core.c | 301 +++++++++++++++++++++++++++++++++++------
> include/linux/pm_opp.h | 43 ++++++
> 2 files changed, 305 insertions(+), 39 deletions(-)
>
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index c79bbfac7289..3ff33a08198e 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -127,6 +127,29 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
> }
> EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
>
> +/**
> + * dev_pm_opp_get_bw() - Gets the bandwidth corresponding to an available opp
> + * @opp: opp for which peak bandwidth has to be returned for
s/peak //
> + * @avg_bw: Pointer where the corresponding average bandwidth is stored.
> + * Can be NULL.
> + *
> + * Return: Peak bandwidth in kBps corresponding to the opp, else
> + * return 0
> + */
> +unsigned long dev_pm_opp_get_bw(struct dev_pm_opp *opp, unsigned long *avg_bw)
> +{
> + if (IS_ERR_OR_NULL(opp) || !opp->available) {
> + pr_err("%s: Invalid parameters\n", __func__);
> + return 0;
> + }
> +
> + if (avg_bw)
Do you see this being NULL in practice ? If no, then we can make it
mandatory for now ?
> + *avg_bw = opp->avg_bw;
> +
> + return opp->peak_bw;
> +}
> +EXPORT_SYMBOL_GPL(dev_pm_opp_get_bw);
> +
> /**
> * dev_pm_opp_get_level() - Gets the level corresponding to an available opp
> * @opp: opp for which level value has to be returned for
> @@ -299,6 +322,34 @@ unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
> }
> EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq);
>
> +/**
> + * dev_pm_opp_get_suspend_opp_bw() - Get peak bandwidth of suspend opp in kBps
Hmm, I wasn't expecting this. So the interconnects will also have a
suspend OPP ?
> + * @dev: device for which we do this operation
> + * @avg_bw: Pointer where the corresponding average bandwidth is stored.
> + * Can be NULL.
> + *
> + * Return: This function returns the peak bandwidth of the OPP marked as
> + * suspend_opp if one is available, else returns 0;
> + */
> +unsigned long dev_pm_opp_get_suspend_opp_bw(struct device *dev,
> + unsigned long *avg_bw)
> +{
> + struct opp_table *opp_table;
> + unsigned long peak_bw = 0;
> +
> + opp_table = _find_opp_table(dev);
> + if (IS_ERR(opp_table))
> + return 0;
> +
> + if (opp_table->suspend_opp && opp_table->suspend_opp->available)
> + peak_bw = dev_pm_opp_get_bw(opp_table->suspend_opp, avg_bw);
> +
> + dev_pm_opp_put_opp_table(opp_table);
> +
> + return peak_bw;
> +}
> +EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_bw);
> +
> int _get_opp_count(struct opp_table *opp_table)
> {
> struct dev_pm_opp *opp;
> @@ -343,6 +394,40 @@ int dev_pm_opp_get_opp_count(struct device *dev)
> }
> EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count);
>
I think we should add function header here instead of the helpers
which get exact match for freq, bw or level. And then pass a enum
value to it, which tells what we are looking to compare. After that
rest of the routines will be just one liners, make them macros in
header file itself.
> +struct dev_pm_opp *dev_pm_opp_find_opp_exact(struct device *dev,
> + struct dev_pm_opp *opp_key,
> + bool available)
--
viresh
