linux-kernel - [PATCH v3 9/9] soundwire: qcom: wait for enumeration to be complete in probe

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Message-Id: <20210308134957.16024-10-srinivas.kandagatla@linaro.org>
Date:   Mon,  8 Mar 2021 13:49:57 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     vkoul@...nel.org
Cc:     yung-chuan.liao@...ux.intel.com,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v3 9/9] soundwire: qcom: wait for enumeration to be complete in probe

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/soundwire/qcom.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 3109ec6c33ac..578a392bfbee 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -123,6 +123,7 @@ struct qcom_swrm_ctrl {
 	struct regmap *regmap;
 	void __iomem *mmio;
 	struct completion broadcast;
+	struct completion enumeration;
 	struct work_struct slave_work;
 	/* Port alloc/free lock */
 	struct mutex port_lock;
@@ -415,6 +416,7 @@ static int qcom_swrm_enumerate(struct sdw_bus *bus)
 			sdw_slave_add(bus, &id, NULL);
 	}
 
+	complete(&ctrl->enumeration);
 	return 0;
 }
 
@@ -1134,6 +1136,7 @@ static int qcom_swrm_probe(struct platform_device *pdev)
 	dev_set_drvdata(&pdev->dev, ctrl);
 	mutex_init(&ctrl->port_lock);
 	init_completion(&ctrl->broadcast);
+	init_completion(&ctrl->enumeration);
 
 	ctrl->bus.ops = &qcom_swrm_ops;
 	ctrl->bus.port_ops = &qcom_swrm_port_ops;
@@ -1180,6 +1183,8 @@ static int qcom_swrm_probe(struct platform_device *pdev)
 	}
 
 	qcom_swrm_init(ctrl);
+	wait_for_completion_timeout(&ctrl->enumeration,
+				    msecs_to_jiffies(TIMEOUT_MS));
 	ret = qcom_swrm_register_dais(ctrl);
 	if (ret)
 		goto err_master_add;
-- 
2.21.0