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Subject[PATCH v2 04/10] 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.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/interconnect/qcom/icc-rpm.c | 10 +++++++---
drivers/interconnect/qcom/icc-rpm.h | 6 ++++++
2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c
index f0e575c95b49..91eb428385f6 100644
--- a/drivers/interconnect/qcom/icc-rpm.c
+++ b/drivers/interconnect/qcom/icc-rpm.c
@@ -300,11 +300,15 @@ static u64 qcom_icc_calc_rate(struct qcom_icc_provider *qp, struct qcom_icc_node
else
agg_avg_rate = qn->sum_avg[ctx];

- /* Check if the node has a specific coefficient first*/
- if (qp->ab_coeff)
+ /* Check if the node has a specific coefficient first */
+ if (qn->ab_coeff)
+ agg_avg_rate = mult_frac(qn->ab_coeff, agg_avg_rate, 100);
+ else if (qp->ab_coeff)
agg_avg_rate = mult_frac(qp->ab_coeff, agg_avg_rate, 100);

- if (qp->ib_coeff)
+ if (qn->ab_coeff)
+ agg_peak_rate = mult_frac(100, qn->max_peak[ctx], qn->ib_coeff);
+ else if (qp->ib_coeff)
agg_peak_rate = mult_frac(100, qn->max_peak[ctx], qp->ib_coeff);
else
agg_peak_rate = qn->max_peak[ctx];
diff --git a/drivers/interconnect/qcom/icc-rpm.h b/drivers/interconnect/qcom/icc-rpm.h
index 835b83cfb548..1a26a7b82166 100644
--- a/drivers/interconnect/qcom/icc-rpm.h
+++ b/drivers/interconnect/qcom/icc-rpm.h
@@ -103,6 +103,9 @@ 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 {
unsigned char *name;
@@ -117,6 +120,9 @@ 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;
};

struct qcom_icc_desc {
--
2.41.0

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