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interconnect: qcom: bcm-voter: Improve enable_mask handling 

We don't need all the complex arithmetic for BCMs utilizing enable_mask,
as all we need to do is to determine whether there's any user (or
keepalive) asking for it to be on.

Separate the logic for such BCMs for a small speed boost.

Suggested-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230811-topic-icc_fix_1he-v2-1-0620af8ac133@linaro.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>
This commit is contained in:
Konrad Dybcio 2023-08-12 01:16:15 +02:00 committed by Georgi Djakov
parent 2ccdd1b13c
commit a1f4170dec
1 changed files with 36 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/interconnect/qcom/bcm-voter.c
View File

@ -58,6 +58,36 @@ static u64 bcm_div(u64 num, u32 base)
return num;
}
/* BCMs with enable_mask use one-hot-encoding for on/off signaling */
static void bcm_aggregate_mask(struct qcom_icc_bcm *bcm)
{
struct qcom_icc_node *node;
int bucket, i;
for (bucket = 0; bucket < QCOM_ICC_NUM_BUCKETS; bucket++) {
bcm->vote_x[bucket] = 0;
bcm->vote_y[bucket] = 0;
for (i = 0; i < bcm->num_nodes; i++) {
node = bcm->nodes[i];
/* If any vote in this bucket exists, keep the BCM enabled */
if (node->sum_avg[bucket] || node->max_peak[bucket]) {
bcm->vote_x[bucket] = 0;
bcm->vote_y[bucket] = bcm->enable_mask;
break;
}
}
}
if (bcm->keepalive) {
bcm->vote_x[QCOM_ICC_BUCKET_AMC] = 1;
bcm->vote_x[QCOM_ICC_BUCKET_WAKE] = 1;
bcm->vote_y[QCOM_ICC_BUCKET_AMC] = 1;
bcm->vote_y[QCOM_ICC_BUCKET_WAKE] = 1;
}
}
static void bcm_aggregate(struct qcom_icc_bcm *bcm)
{
struct qcom_icc_node *node;
@ -83,11 +113,6 @@ static void bcm_aggregate(struct qcom_icc_bcm *bcm)
temp = agg_peak[bucket] * bcm->vote_scale;
bcm->vote_y[bucket] = bcm_div(temp, bcm->aux_data.unit);
if (bcm->enable_mask && (bcm->vote_x[bucket] || bcm->vote_y[bucket])) {
bcm->vote_x[bucket] = 0;
bcm->vote_y[bucket] = bcm->enable_mask;
}
}
if (bcm->keepalive && bcm->vote_x[QCOM_ICC_BUCKET_AMC] == 0 &&
@ -260,8 +285,12 @@ int qcom_icc_bcm_voter_commit(struct bcm_voter *voter)
return 0;
mutex_lock(&voter->lock);
list_for_each_entry(bcm, &voter->commit_list, list)
bcm_aggregate(bcm);
list_for_each_entry(bcm, &voter->commit_list, list) {
if (bcm->enable_mask)
bcm_aggregate_mask(bcm);
else
bcm_aggregate(bcm);
}
/*
* Pre sort the BCMs based on VCD for ease of generating a command list