linux-kernel - Re: [PATCH 3/3] soc: qcom: apr: Add avs/audio tracking functionality

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Message-ID: <0101016e83324a05-f96f3ec6-445f-413e-b67e-20a226b54673-000000@us-west-2.amazonses.com>
Date:   Tue, 19 Nov 2019 10:25:41 +0000
From:   sibis@...eaurora.org
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     srinivas.kandagatla@...aro.org, robh+dt@...nel.org,
        tsoni@...eaurora.org, agross@...nel.org, mark.rutland@....com,
        linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        rnayak@...eaurora.org
Subject: Re: [PATCH 3/3] soc: qcom: apr: Add avs/audio tracking functionality

On 2019-11-19 12:23, Bjorn Andersson wrote:
> On Mon 18 Nov 06:28 PST 2019, Sibi Sankar wrote:
>> diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
> [..]
>> +static void of_register_apr_devices(struct device *dev, const char 
>> *svc_path)
>>  {
>>  	struct apr *apr = dev_get_drvdata(dev);
>>  	struct device_node *node;
>> +	const char *service_path;
>> +	int ret;
>> 
>>  	for_each_child_of_node(dev->of_node, node) {
>>  		struct apr_device_id id = { {0} };
>> 
>> +		ret = of_property_read_string_index(node, "qcom,protection-domain",
>> +						    1, &service_path);
>> +		if (svc_path) {
>> +			/* skip APR services that are PD independent */
>> +			if (ret)
>> +				continue;
>> +
>> +			/* skip APR services whose PD paths don't match */
>> +			if (strcmp(service_path, svc_path))
>> +				continue;
>> +		} else {
>> +			/* skip APR services whose PD lookups are registered*/
> 
> Missing space before */

Thanks will add it

> 
>> +			if (ret == 0)
>> +				continue;
>> +		}
>> +
>>  		if (of_property_read_u32(node, "reg", &id.svc_id))
>>  			continue;
>> 
>> @@ -318,6 +365,37 @@ static void of_register_apr_devices(struct device 
>> *dev)
>>  	}
>>  }
>> 
>> +static int apr_remove_device(struct device *dev, void *svc_path)
>> +{
>> +	struct apr_device *adev = to_apr_device(dev);
>> +
>> +	if (svc_path) {
>> +		if (!strcmp(adev->service_path, (char *)svc_path))
>> +			device_unregister(&adev->dev);
>> +	} else {
>> +		device_unregister(&adev->dev);
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static int apr_pd_status(struct pdr_handle *pdr, struct pdr_service 
>> *pds)
> 
> Why is the pdr status function returning an int?

yes since I am not using the
return value in pdr_helpers
will make it void.

> 
>> +{
>> +	struct apr *apr = container_of(pdr, struct apr, pdr);
>> +
>> +	switch (pds->state) {
>> +	case SERVREG_SERVICE_STATE_UP:
>> +		of_register_apr_devices(apr->dev, pds->service_path);
>> +		break;
>> +	case SERVREG_SERVICE_STATE_DOWN:
>> +		device_for_each_child(apr->dev, pds->service_path,
>> +				      apr_remove_device);
>> +		break;
>> +	}
>> +
>> +	return 0;
>> +}
> [..]
>> @@ -343,20 +421,19 @@ static int apr_probe(struct rpmsg_device *rpdev)
>>  		return -ENOMEM;
>>  	}
>>  	INIT_WORK(&apr->rx_work, apr_rxwq);
>> +
>> +	ret = pdr_handle_init(&apr->pdr, apr_pd_status);
>> +	if (ret) {
>> +		dev_err(dev, "Failed to init PDR handle\n");
> 
> You need to destroy apr->rxwq here as well.

sry missed this

> 
>> +		return ret;
>> +	}
>> +
>>  	INIT_LIST_HEAD(&apr->rx_list);
>>  	spin_lock_init(&apr->rx_lock);
>>  	spin_lock_init(&apr->svcs_lock);
>>  	idr_init(&apr->svcs_idr);
>> -	of_register_apr_devices(dev);
>> -
>> -	return 0;
>> -}
> 
> Regards,
> Bjorn