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authorPrasad Sodagudi <quic_psodagud@quicinc.com>2022-05-17 16:13:00 +0530
committerJassi Brar <jaswinder.singh@linaro.org>2022-05-21 11:41:30 -0500
commitc25f77899753fdd6f43fa6999abd53fd0059496e (patch)
treec66f9c797d55b9b46aa0330fc835f1f8809bfa8f /drivers/mailbox
parent369e4ef87a8f5da7c348ec2c61ec5cd726e8337a (diff)
mailbox: qcom-ipcc: Log the pending interrupt during resume
Enable logging of the pending interrupt that triggered device wakeup. This logging information helps to debug IRQs that cause periodic device wakeups by printing the detailed information of pending IPCC interrupts. Scenario: Device wakeup caused by Modem crash Logs: qcom-ipcc mailbox: virq: 182 triggered client-id: 2; signal-id: 2 From the IPCC bindings it can further be understood that the client here is IPCC_CLIENT_MPSS and the signal was IPCC_MPROC_SIGNAL_SMP2P. Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Signed-off-by: Prasad Sodagudi <quic_psodagud@quicinc.com> Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox')
-rw-r--r--drivers/mailbox/qcom-ipcc.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/mailbox/qcom-ipcc.c b/drivers/mailbox/qcom-ipcc.c
index 881706da59c0..2583b20cdeb7 100644
--- a/drivers/mailbox/qcom-ipcc.c
+++ b/drivers/mailbox/qcom-ipcc.c
@@ -255,6 +255,24 @@ static int qcom_ipcc_setup_mbox(struct qcom_ipcc *ipcc,
return devm_mbox_controller_register(dev, mbox);
}
+static int qcom_ipcc_pm_resume(struct device *dev)
+{
+ struct qcom_ipcc *ipcc = dev_get_drvdata(dev);
+ u32 hwirq;
+ int virq;
+
+ hwirq = readl(ipcc->base + IPCC_REG_RECV_ID);
+ if (hwirq == IPCC_NO_PENDING_IRQ)
+ return 0;
+
+ virq = irq_find_mapping(ipcc->irq_domain, hwirq);
+
+ dev_dbg(dev, "virq: %d triggered client-id: %ld; signal-id: %ld\n", virq,
+ FIELD_GET(IPCC_CLIENT_ID_MASK, hwirq), FIELD_GET(IPCC_SIGNAL_ID_MASK, hwirq));
+
+ return 0;
+}
+
static int qcom_ipcc_probe(struct platform_device *pdev)
{
struct qcom_ipcc *ipcc;
@@ -325,6 +343,10 @@ static const struct of_device_id qcom_ipcc_of_match[] = {
};
MODULE_DEVICE_TABLE(of, qcom_ipcc_of_match);
+static const struct dev_pm_ops qcom_ipcc_dev_pm_ops = {
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, qcom_ipcc_pm_resume)
+};
+
static struct platform_driver qcom_ipcc_driver = {
.probe = qcom_ipcc_probe,
.remove = qcom_ipcc_remove,
@@ -332,6 +354,7 @@ static struct platform_driver qcom_ipcc_driver = {
.name = "qcom-ipcc",
.of_match_table = qcom_ipcc_of_match,
.suppress_bind_attrs = true,
+ .pm = pm_sleep_ptr(&qcom_ipcc_dev_pm_ops),
},
};