[PATCH] interconnect: qcom: Ensure that the floor bandwidth value is enforced

[PATCH] interconnect: qcom: Ensure that the floor bandwidth value is enforced

[Georgi Djakov]

Take into account the initial bandwidth from the framework and update
the internal sum and max values before committing if needed. This will
ensure that the floor bandwidth values are enforced until the providers
get into sync state.

Fixes: 7d3b0b0d8184 ("interconnect: qcom: Use icc_sync_state")
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
---
 drivers/interconnect/qcom/icc-rpmh.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/interconnect/qcom/icc-rpmh.c b/drivers/interconnect/qcom/icc-rpmh.c
index cf10a4b9611b..bf01d09dba6c 100644
--- a/drivers/interconnect/qcom/icc-rpmh.c
+++ b/drivers/interconnect/qcom/icc-rpmh.c
@@ -79,6 +79,7 @@ EXPORT_SYMBOL_GPL(qcom_icc_aggregate);
 int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
 {
 	struct qcom_icc_provider *qp;
+	struct qcom_icc_node *qn;
 	struct icc_node *node;
 
 	if (!src)
@@ -87,6 +88,12 @@ int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
 		node = src;
 
 	qp = to_qcom_provider(node->provider);
+	qn = node->data;
+
+	qn->sum_avg[QCOM_ICC_BUCKET_AMC] = max_t(u64, qn->sum_avg[QCOM_ICC_BUCKET_AMC],
+						 node->avg_bw);
+	qn->max_peak[QCOM_ICC_BUCKET_AMC] = max_t(u64, qn->max_peak[QCOM_ICC_BUCKET_AMC],
+						  node->peak_bw);
 
 	qcom_icc_bcm_voter_commit(qp->voter);
 

Re: [PATCH] interconnect: qcom: Ensure that the floor bandwidth value is enforced

[Akash Asthana]

On 10/21/2020 9:29 PM, Georgi Djakov wrote:
> Take into account the initial bandwidth from the framework and update
> the internal sum and max values before committing if needed. This will
> ensure that the floor bandwidth values are enforced until the providers
> get into sync state.
>
> Fixes: 7d3b0b0d8184 ("interconnect: qcom: Use icc_sync_state")
> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>

Thanks Georgi,
I removed proxy ICC BW votes for earlycon driver "qcom_geni" introduced by patch [1], trogdor chromium board booted up fine, which use to crash without this patch.

https://patchwork.kernel.org/project/linux-arm-msm/patch/1592908737-7068-3-git-send-email-akashast@codeaurora.org/ [1]

Tested-by: Akash Asthana <akashast@codeaurora.org>
>   

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