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

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] https://github.com/sonyxperiadev/kernel/commit/7456d9779af9ad6bb9c7ee6f33d5c5a8d3648e24
[2] https://github.com/artem/android_kernel_sony_msm8996/commit/bf7a8985dcaf0eab5bc2562d2d6775e7e29c0f30
Signed-off-by: Konrad Dybcio <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Georgi Djakov <[e-mail]>

drivers/interconnect/qcom/icc-rpm.c

···
 	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];
 	}
···
 
 	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)) {

drivers/interconnect/qcom/icc-rpm.h

···
  * @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 {
···
 	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];
 };