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interconnect: qcom: icc-rpm: Check for node-specific rate coefficients

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Some nodes may have different coefficients than the general values for
bus they're attached to. Check for that and use them if present. See
[1], [2] for reference.

[1] 7456d9779a
[2] bf7a8985dc
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230726-topic-icc_coeff-v4-4-c04b60caa467@linaro.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>
This commit is contained in:
Konrad Dybcio 2023-08-25 17:38:26 +02:00 committed by Georgi Djakov
parent 919791d82d
commit ba3f826639
2 changed files with 14 additions and 4 deletions
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14
drivers/interconnect/qcom/icc-rpm.c
View File

@ -300,14 +300,14 @@ static u64 qcom_icc_calc_rate(struct qcom_icc_provider *qp, struct qcom_icc_node
else
agg_avg_rate = qn->sum_avg[ctx];
if (qp->ab_coeff) {
agg_avg_rate = agg_avg_rate * qp->ab_coeff;
if (qn->ab_coeff) {
agg_avg_rate = agg_avg_rate * qn->ab_coeff;
agg_avg_rate = div_u64(agg_avg_rate, 100);
}
if (qp->ib_coeff) {
if (qn->ib_coeff) {
agg_peak_rate = qn->max_peak[ctx] * 100;
agg_peak_rate = div_u64(qn->max_peak[ctx], qp->ib_coeff);
agg_peak_rate = div_u64(qn->max_peak[ctx], qn->ib_coeff);
} else {
agg_peak_rate = qn->max_peak[ctx];
}
@ -563,6 +563,12 @@ regmap_done:
for (i = 0; i < num_nodes; i++) {
size_t j;
if (!qnodes[i]->ab_coeff)
qnodes[i]->ab_coeff = qp->ab_coeff;
if (!qnodes[i]->ib_coeff)
qnodes[i]->ib_coeff = qp->ib_coeff;
node = icc_node_create(qnodes[i]->id);
if (IS_ERR(node)) {
ret = PTR_ERR(node);

4
drivers/interconnect/qcom/icc-rpm.h
View File

@ -103,6 +103,8 @@ struct qcom_icc_qos {
* @mas_rpm_id: RPM id for devices that are bus masters
* @slv_rpm_id: RPM id for devices that are bus slaves
* @qos: NoC QoS setting parameters
* @ab_coeff: a percentage-based coefficient for compensating the AB calculations
* @ib_coeff: an inverse-percentage-based coefficient for compensating the IB calculations
* @bus_clk_rate: a pointer to an array containing bus clock rates in Hz
*/
struct qcom_icc_node {
@ -118,6 +120,8 @@ struct qcom_icc_node {
int mas_rpm_id;
int slv_rpm_id;
struct qcom_icc_qos qos;
u16 ab_coeff;
u16 ib_coeff;
u32 bus_clk_rate[QCOM_SMD_RPM_STATE_NUM];
};