linux-kernel - [PATCH] interconnect: qcom: Ensure that the floor bandwidth value is enforced

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Message-Id: <20201021155938.9223-1-georgi.djakov@linaro.org>
Date:   Wed, 21 Oct 2020 18:59:38 +0300
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     linux-pm@...r.kernel.org
Cc:     akashast@...eaurora.org, mdtipton@...eaurora.org,
        saravanak@...gle.com, bjorn.andersson@...aro.org,
        linux-kernel@...r.kernel.org, georgi.djakov@...aro.org
Subject: [PATCH] interconnect: qcom: Ensure that the floor bandwidth value is enforced

Take into account the initial bandwidth from the framework and update
the internal sum and max values before committing if needed. This will
ensure that the floor bandwidth values are enforced until the providers
get into sync state.

Fixes: 7d3b0b0d8184 ("interconnect: qcom: Use icc_sync_state")
Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>
---
 drivers/interconnect/qcom/icc-rpmh.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/interconnect/qcom/icc-rpmh.c b/drivers/interconnect/qcom/icc-rpmh.c
index cf10a4b9611b..bf01d09dba6c 100644
--- a/drivers/interconnect/qcom/icc-rpmh.c
+++ b/drivers/interconnect/qcom/icc-rpmh.c
@@ -79,6 +79,7 @@ EXPORT_SYMBOL_GPL(qcom_icc_aggregate);
 int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
 {
 	struct qcom_icc_provider *qp;
+	struct qcom_icc_node *qn;
 	struct icc_node *node;
 
 	if (!src)
@@ -87,6 +88,12 @@ int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
 		node = src;
 
 	qp = to_qcom_provider(node->provider);
+	qn = node->data;
+
+	qn->sum_avg[QCOM_ICC_BUCKET_AMC] = max_t(u64, qn->sum_avg[QCOM_ICC_BUCKET_AMC],
+						 node->avg_bw);
+	qn->max_peak[QCOM_ICC_BUCKET_AMC] = max_t(u64, qn->max_peak[QCOM_ICC_BUCKET_AMC],
+						  node->peak_bw);
 
 	qcom_icc_bcm_voter_commit(qp->voter);