linux-kernel - [PATCH v7 6/7] OPP: Update the bandwidth on OPP frequency changes

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Date:   Fri, 24 Apr 2020 18:54:03 +0300
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     vireshk@...nel.org, nm@...com, sboyd@...nel.org,
        robh+dt@...nel.org, rjw@...ysocki.net, saravanak@...gle.com,
        sibis@...eaurora.org
Cc:     rnayak@...eaurora.org, bjorn.andersson@...aro.org,
        vincent.guittot@...aro.org, jcrouse@...eaurora.org,
        evgreen@...omium.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        georgi.djakov@...aro.org
Subject: [PATCH v7 6/7] OPP: Update the bandwidth on OPP frequency changes

If the OPP bandwidth values are populated, we want to switch also the
interconnect bandwidth in addition to frequency and voltage.

Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>
---
v7:
* Addressed review comments from Viresh.

v2: https://lore.kernel.org/r/20190423132823.7915-5-georgi.djakov@linaro.org

 drivers/opp/core.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 8e86811eb7b2..66a8ea10f3de 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -808,7 +808,7 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 	unsigned long freq, old_freq, temp_freq;
 	struct dev_pm_opp *old_opp, *opp;
 	struct clk *clk;
-	int ret;
+	int ret, i;
 
 	opp_table = _find_opp_table(dev);
 	if (IS_ERR(opp_table)) {
@@ -895,6 +895,17 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 			dev_err(dev, "Failed to set required opps: %d\n", ret);
 	}
 
+	if (!ret && opp_table->paths) {
+		for (i = 0; i < opp_table->path_count; i++) {
+			ret = icc_set_bw(opp_table->paths[i],
+					 opp->bandwidth[i].avg,
+					 opp->bandwidth[i].peak);
+			if (ret)
+				dev_err(dev, "Failed to set bandwidth[%d]: %d\n",
+					i, ret);
+		}
+	}
+
 put_opp:
 	dev_pm_opp_put(opp);
 put_old_opp: