From 32882f657e7811abb6a883653b68dce0539a693e Mon Sep 17 00:00:00 2001 From: Konrad Dybcio Date: Fri, 7 Apr 2023 22:14:46 +0200 Subject: interconnect: qcom: rpm: Set QoS registers only once The QoS registers are (or according to Qualcomm folks, on most platforms) persistent until a full chip reboot. Move the QoS-setting functions to the probe function so that we don't needlessly do it over and over again. Signed-off-by: Konrad Dybcio Link: https://lore.kernel.org/r/20230228-topic-qos-v8-4-ee696a2c15a9@linaro.org Signed-off-by: Georgi Djakov --- drivers/interconnect/qcom/icc-rpm.c | 50 ++++++++++++++++--------------------- 1 file changed, 21 insertions(+), 29 deletions(-) (limited to 'drivers/interconnect') diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c index 7d62c0bf2722..d79e508cb717 100644 --- a/drivers/interconnect/qcom/icc-rpm.c +++ b/drivers/interconnect/qcom/icc-rpm.c @@ -204,30 +204,33 @@ static int qcom_icc_qos_set(struct icc_node *node) } } -static int qcom_icc_rpm_set(int mas_rpm_id, int slv_rpm_id, u64 sum_bw) +static int qcom_icc_rpm_set(struct qcom_icc_node *qn, u64 sum_bw) { int ret = 0; - if (mas_rpm_id != -1) { + if (qn->qos.ap_owned) + return 0; + + if (qn->mas_rpm_id != -1) { ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE, RPM_BUS_MASTER_REQ, - mas_rpm_id, + qn->mas_rpm_id, sum_bw); if (ret) { pr_err("qcom_icc_rpm_smd_send mas %d error %d\n", - mas_rpm_id, ret); + qn->mas_rpm_id, ret); return ret; } } - if (slv_rpm_id != -1) { + if (qn->slv_rpm_id != -1) { ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE, RPM_BUS_SLAVE_REQ, - slv_rpm_id, + qn->slv_rpm_id, sum_bw); if (ret) { pr_err("qcom_icc_rpm_smd_send slv %d error %d\n", - slv_rpm_id, ret); + qn->slv_rpm_id, ret); return ret; } } @@ -235,26 +238,6 @@ static int qcom_icc_rpm_set(int mas_rpm_id, int slv_rpm_id, u64 sum_bw) return ret; } -static int __qcom_icc_set(struct icc_node *n, struct qcom_icc_node *qn, - u64 sum_bw) -{ - int ret; - - if (!qn->qos.ap_owned) { - /* send bandwidth request message to the RPM processor */ - 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 != NOC_QOS_MODE_INVALID) { - /* set bandwidth directly from the AP */ - ret = qcom_icc_qos_set(n, sum_bw); - if (ret) - return ret; - } - - return 0; -} - /** * qcom_icc_pre_bw_aggregate - cleans up values before re-aggregate requests * @node: icc node to operate on @@ -370,11 +353,12 @@ static int qcom_icc_set(struct icc_node *src, struct icc_node *dst) sum_bw = icc_units_to_bps(max_agg_avg); - ret = __qcom_icc_set(src, src_qn, sum_bw); + ret = qcom_icc_rpm_set(src_qn, sum_bw); if (ret) return ret; + if (dst_qn) { - ret = __qcom_icc_set(dst, dst_qn, sum_bw); + ret = qcom_icc_rpm_set(dst_qn, sum_bw); if (ret) return ret; } @@ -528,6 +512,14 @@ regmap_done: for (j = 0; j < qnodes[i]->num_links; j++) icc_link_create(node, qnodes[i]->links[j]); + /* Set QoS registers (we only need to do it once, generally) */ + if (qnodes[i]->qos.ap_owned && + qnodes[i]->qos.qos_mode != NOC_QOS_MODE_INVALID) { + ret = qcom_icc_qos_set(node); + if (ret) + return ret; + } + data->nodes[i] = node; } data->num_nodes = num_nodes; -- cgit v1.2.3