linux-kernel - Re: [PATCH 5/5] drm-bridge: display-connector: Switch to use fwnode API

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Message-ID: <5b0e1b73-9a94-4ab5-b30d-59caea8954cb@linux.dev>
Date: Tue, 23 Jan 2024 20:35:48 +0800
From: Sui Jingfeng <sui.jingfeng@...ux.dev>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: David Airlie <airlied@...il.com>,
 Neil Armstrong <neil.armstrong@...aro.org>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 Daniel Vetter <daniel@...ll.ch>, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org, Sui Jingfeng <suijingfeng@...ngson.cn>
Subject: Re: [PATCH 5/5] drm-bridge: display-connector: Switch to use fwnode
 API

Hi,


On 2024/1/23 09:20, Laurent Pinchart wrote:
> On Tue, Jan 23, 2024 at 12:32:20AM +0800, Sui Jingfeng wrote:
>> From: Sui Jingfeng<suijingfeng@...ngson.cn>
>>
>> Because API has wider coverage, it can be used on non-DT systems as well.
>>
>> Signed-off-by: Sui Jingfeng<suijingfeng@...ngson.cn>
>> ---
>>   drivers/gpu/drm/bridge/display-connector.c | 22 ++++++++++++----------
>>   1 file changed, 12 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c
>> index eb7e194e7735..2c3e54a458e8 100644
>> --- a/drivers/gpu/drm/bridge/display-connector.c
>> +++ b/drivers/gpu/drm/bridge/display-connector.c
>> @@ -243,8 +243,8 @@ static int display_connector_probe(struct platform_device *pdev)
>>   	case DRM_MODE_CONNECTOR_DVII: {
>>   		bool analog, digital;
>>   
>> -		analog = of_property_read_bool(pdev->dev.of_node, "analog");
>> -		digital = of_property_read_bool(pdev->dev.of_node, "digital");
>> +		analog = fwnode_property_present(pdev->dev.fwnode, "analog");
>> +		digital = fwnode_property_present(pdev->dev.fwnode, "digital");
>>   		if (analog && !digital) {
>>   			conn->bridge.type = DRM_MODE_CONNECTOR_DVIA;
>>   		} else if (!analog && digital) {
>> @@ -261,8 +261,8 @@ static int display_connector_probe(struct platform_device *pdev)
>>   	case DRM_MODE_CONNECTOR_HDMIA: {
>>   		const char *hdmi_type;
>>   
>> -		ret = of_property_read_string(pdev->dev.of_node, "type",
>> -					      &hdmi_type);
>> +		ret = fwnode_property_read_string(pdev->dev.fwnode, "type",
>> +						  &hdmi_type);
>>   		if (ret < 0) {
>>   			dev_err(&pdev->dev, "HDMI connector with no type\n");
>>   			return -EINVAL;
>> @@ -292,7 +292,7 @@ static int display_connector_probe(struct platform_device *pdev)
>>   	conn->bridge.interlace_allowed = true;
>>   
>>   	/* Get the optional connector label. */
>> -	of_property_read_string(pdev->dev.of_node, "label", &label);
>> +	fwnode_property_read_string(pdev->dev.fwnode, "label", &label);
>>   
>>   	/*
>>   	 * Get the HPD GPIO for DVI, HDMI and DP connectors. If the GPIO can provide
>> @@ -330,12 +330,13 @@ static int display_connector_probe(struct platform_device *pdev)
>>   	if (type == DRM_MODE_CONNECTOR_DVII ||
>>   	    type == DRM_MODE_CONNECTOR_HDMIA ||
>>   	    type == DRM_MODE_CONNECTOR_VGA) {
>> -		struct device_node *phandle;
>> +		struct fwnode_handle *fwnode;
>>   
>> -		phandle = of_parse_phandle(pdev->dev.of_node, "ddc-i2c-bus", 0);
>> -		if (phandle) {
>> -			conn->bridge.ddc = of_get_i2c_adapter_by_node(phandle);
>> -			of_node_put(phandle);
>> +		fwnode = fwnode_find_reference(pdev->dev.fwnode, "ddc-i2c-bus", 0);
>> +		if (!IS_ERR_OR_NULL(fwnode)) {
>> +			dev_info(&pdev->dev, "has I2C bus property\n");
> This looks like a debugging leftover.


Yes, thanks a lot for reviewing.
I will pick up suggestions and go back to improve.