linux-kernel - [PATCH 3/4] interconnect: qcom: smd845: Use icc_sync

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Message-Id: <20200709110705.30359-4-georgi.djakov@linaro.org>
Date:   Thu,  9 Jul 2020 14:07:04 +0300
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     linux-pm@...r.kernel.org
Cc:     saravanak@...gle.com, mdtipton@...eaurora.org,
        okukatla@...eaurora.org, bjorn.andersson@...aro.org,
        vincent.guittot@...aro.org, georgi.djakov@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] interconnect: qcom: smd845: Use icc_sync_state

Lowering the bandwidth on the bus might have negative consequences if
it's done before all consumers had a chance to cast their vote. Let's
return the maximum amount of bandwidth as initial value. This bandwidth
level would be maintained until all consumers have probed.

Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>
---
 drivers/interconnect/qcom/sdm845.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/interconnect/qcom/sdm845.c b/drivers/interconnect/qcom/sdm845.c
index f6c7b969520d..bfea6a5321b0 100644
--- a/drivers/interconnect/qcom/sdm845.c
+++ b/drivers/interconnect/qcom/sdm845.c
@@ -437,6 +437,13 @@ static const struct qcom_icc_desc sdm845_system_noc = {
 	.num_bcms = ARRAY_SIZE(system_noc_bcms),
 };
 
+static int qcom_get_bw(struct icc_node *node, u32 *bw)
+{
+	*bw = INT_MAX;
+
+	return 0;
+}
+
 static int qnoc_probe(struct platform_device *pdev)
 {
 	const struct qcom_icc_desc *desc;
@@ -469,6 +476,7 @@ static int qnoc_probe(struct platform_device *pdev)
 	provider->set = qcom_icc_set;
 	provider->pre_aggregate = qcom_icc_pre_aggregate;
 	provider->aggregate = qcom_icc_aggregate;
+	provider->get_bw = qcom_get_bw;
 	provider->xlate = of_icc_xlate_onecell;
 	INIT_LIST_HEAD(&provider->nodes);
 	provider->data = data;
@@ -559,6 +567,7 @@ static struct platform_driver qnoc_driver = {
 	.driver = {
 		.name = "qnoc-sdm845",
 		.of_match_table = qnoc_of_match,
+		.sync_state = icc_sync_state,
 	},
 };
 module_platform_driver(qnoc_driver);