linux-kernel - [PATCH 2/4] interconnect: qcom: rpm: Set QoS parameters regardless of RPM bw setting

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Date:   Tue,  3 Jan 2023 18:30:57 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org, krzysztof.kozlowski@...aro.org
Cc:     marijn.suijten@...ainline.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Georgi Djakov <djakov@...nel.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        AngeloGioacchino Del Regno <kholk11@...il.com>
Subject: [PATCH 2/4] interconnect: qcom: rpm: Set QoS parameters regardless of RPM bw setting

QoS parameters and RPM bandwidth requests are wholly separate. Setting one
should only depend on the description of the interconnect node and not
whether the other is present. If we vote through RPM, QoS parameters
should be set so that the bus controller can make better decisions.
If we don't vote through RPM, QoS parameters should be set regardless,
as we're requesting additional bandwidth by setting the interconnect
clock rates.

The Fixes tag references the commit in which this logic was added, it
has since been shuffled around to a different file, but it's the one
where it originates from.

Fixes: f80a1d414328 ("interconnect: qcom: Add SDM660 interconnect provider driver")
Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 drivers/interconnect/qcom/icc-rpm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c
index 06e0fee547ab..a190a0a839c8 100644
--- a/drivers/interconnect/qcom/icc-rpm.c
+++ b/drivers/interconnect/qcom/icc-rpm.c
@@ -252,8 +252,10 @@ static int __qcom_icc_set(struct icc_node *n, struct qcom_icc_node *qn,
 		ret = qcom_icc_rpm_set(qn->mas_rpm_id, qn->slv_rpm_id, sum_bw);
 		if (ret)
 			return ret;
-	} else if (qn->qos.qos_mode != -1) {
-		/* set bandwidth directly from the AP */
+	}
+
+	if (qn->qos.qos_mode != NOC_QOS_MODE_INVALID) {
+		/* Set QoS params from the AP */
 		ret = qcom_icc_qos_set(n, sum_bw);
 		if (ret)
 			return ret;
-- 
2.39.0