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interconnect: qcom: Add support for enabling BCMs needed for QoS

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Some QoS blocks require voting for BCMs before their registers can be
accessed, since they require clocks and regulators controlled by BCM.

Change-Id: Ic93d224c7dc56c8e56d527179a0c2d1e888e3822
Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>
Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>
This commit is contained in:
Mike Tipton 2021-05-05 00:09:22 -07:00 • committed by Gerrit - the friendly Code Review server
parent 38d03da9dd
commit 937337ff1b
2 changed files with 81 additions and 1 deletions
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78
drivers/interconnect/qcom/icc-rpmh.c
View file

@ -177,4 +177,82 @@ int qcom_icc_bcm_init(struct qcom_icc_bcm *bcm, struct device *dev)
}
EXPORT_SYMBOL(qcom_icc_bcm_init);
static bool bcm_needs_qos_proxy(struct qcom_icc_bcm *bcm)
{
int i;
if (bcm->voter_idx == 0)
for (i = 0; i < bcm->num_nodes; i++)
if (bcm->nodes[i]->qosbox)
return true;
return false;
}
/**
* qcom_icc_enable_qos_deps - enable clocks and BCMs required for QoS
* @qp: interconnect provider associated with masters whose QoS to be set
*
* Return: 0 on success, or an error code otherwise
*/
int qcom_icc_enable_qos_deps(struct qcom_icc_provider *qp)
{
struct qcom_icc_bcm *bcm;
struct bcm_voter *voter;
bool keepalive;
int ret, i;
for (i = 0; i < qp->num_bcms; i++) {
bcm = qp->bcms[i];
if (bcm_needs_qos_proxy(bcm)) {
keepalive = bcm->keepalive;
bcm->keepalive = true;
voter = qp->voters[bcm->voter_idx];
qcom_icc_bcm_voter_add(voter, bcm);
ret = qcom_icc_bcm_voter_commit(voter);
bcm->keepalive = keepalive;
if (ret) {
dev_err(qp->dev, "failed to vote BW to %s for QoS\n",
bcm->name);
return ret;
}
}
}
ret = clk_bulk_prepare_enable(qp->num_clks, qp->clks);
if (ret) {
dev_err(qp->dev, "failed to enable clocks for QoS\n");
return ret;
}
return 0;
}
EXPORT_SYMBOL(qcom_icc_enable_qos_deps);
/**
* qcom_icc_disable_qos_deps - disable clocks and BCMs
* @qp: interconnect provider associated with masters whose QoS to be set
*/
void qcom_icc_disable_qos_deps(struct qcom_icc_provider *qp)
{
struct qcom_icc_bcm *bcm;
struct bcm_voter *voter;
int i;
clk_bulk_disable_unprepare(qp->num_clks, qp->clks);
for (i = 0; i < qp->num_bcms; i++) {
bcm = qp->bcms[i];
if (bcm_needs_qos_proxy(bcm)) {
voter = qp->voters[bcm->voter_idx];
qcom_icc_bcm_voter_add(voter, bcm);
qcom_icc_bcm_voter_commit(voter);
}
}
}
EXPORT_SYMBOL(qcom_icc_disable_qos_deps);
MODULE_LICENSE("GPL v2");

4
drivers/interconnect/qcom/icc-rpmh.h
View file

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2019-2021, The Linux Foundation. All rights reserved.
*
*/
@ -149,5 +149,7 @@ int qcom_icc_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
int qcom_icc_set(struct icc_node *src, struct icc_node *dst);
int qcom_icc_bcm_init(struct qcom_icc_bcm *bcm, struct device *dev);
void qcom_icc_pre_aggregate(struct icc_node *node);
int qcom_icc_enable_qos_deps(struct qcom_icc_provider *qp);
void qcom_icc_disable_qos_deps(struct qcom_icc_provider *qp);
#endif