diff options
| author | Neil Armstrong <neil.armstrong@linaro.org> | 2024-11-19 18:56:36 +0100 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2024-12-23 16:27:22 +0530 |
| commit | b89c0ed09e1189217cd9d516b739627c523d53a4 (patch) | |
| tree | cd0173bae19164550f358eb4f87e8b58554c8ef9 /drivers/opp | |
| parent | 40384c840ea1944d7c5a392e8975ed088ecf0b37 (diff) | |
opp: core: implement dev_pm_opp_get_bw
Add and implement 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@linaro.org>
[ Viresh: Fixed commit log and a comment in code ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/opp')
| -rw-r--r-- | drivers/opp/core.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 0311b18319a4..d4a0030a0228 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -107,6 +107,31 @@ static bool assert_single_clk(struct opp_table *opp_table) } /** + * dev_pm_opp_get_bw() - Gets the bandwidth corresponding to an opp + * @opp: opp for which bandwidth has to be returned for + * @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 * |