linux-kernel - Re: [v6 PATCH 1/6] extcon: Add Type-C and DP support

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Message-ID: <5791E9FD.10407@rock-chips.com>
Date:	Fri, 22 Jul 2016 17:40:13 +0800
From:	Chris Zhong <zyw@...k-chips.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>, dianders@...omium.org,
	tfiga@...omium.org, heiko@...ech.de, yzq@...k-chips.com,
	groeck@...omium.org, myungjoo.ham@...sung.com, wulf@...k-chips.com,
	marcheu@...omium.org
Cc:	linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [v6 PATCH 1/6] extcon: Add Type-C and DP support

Hi Chanwoo Choi

Thanks for your help, I am going to post V7 next week base on these 
latest extcon patch.

Regards
Chris Zhong

On 07/22/2016 05:29 PM, Chanwoo Choi wrote:
> Hi Chris,
>
> I'm sorry for late reply. I finished the first draft to support the extcon property.
> You can check the patches[1]. But, I need more time to test it. After tested it,
> I'll send the patches.
>
> [1] https://git.kernel.org/cgit/linux/kernel/git/chanwoo/extcon.git/log/?h=extcon-test
>
> Chanwoo Choi (4):
>    extcon: Add the extcon_type to group each connector into five category
>    extcon: Add the support for extcon property according to type of connector
>    extcon: Rename the extcon_set/get_state() to maintain the function naming pattern
>    extcon: Add the sync APIs to support the  notification for extcon property
>
> Chris Zhong (1):
>    extcon: Add EXTCON_DISP_DP and the property for USB Type-C
>
> Regards,
> Chanwoo Choi
>
> On 2016년 07월 21일 22:13, Chris Zhong wrote:
>> Add EXTCON_DISP_DP for the Display external connector. For Type-C
>> connector the DisplayPort can work as an Alternate Mode(VESA DisplayPort
>> Alt Mode on USB Type-C Standard). The Type-C support both normal and
>> flipped orientation, so add a property to extcon.
>>
>> Signe-off-by: Chris Zhong <zyw@...k-chips.com>
>>
>> Signed-off-by: Chris Zhong <zyw@...k-chips.com>
>> ---
>>
>> Changes in v6:
>> - move the EXTCON_PROP_TYPEC_POLARITY to EXTCON_TYPE_USB in _supported
>> Series-changes: 5
>> - support get property
>>
>> Changes in v5: None
>> Changes in v4: None
>> Changes in v3: None
>> Changes in v2: None
>> Changes in v1: None
>>
>>   drivers/extcon/extcon.c | 26 ++++++++++++++++++++++++++
>>   include/linux/extcon.h  | 13 +++++++++++++
>>   2 files changed, 39 insertions(+)
>>
>> diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
>> index a1117db..f79b510 100644
>> --- a/drivers/extcon/extcon.c
>> +++ b/drivers/extcon/extcon.c
>> @@ -157,6 +157,11 @@ struct __extcon_info {
>>   		.id = EXTCON_DISP_VGA,
>>   		.name = "VGA",
>>   	},
>> +	[EXTCON_DISP_DP] = {
>> +		.type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB,
>> +		.id = EXTCON_DISP_DP,
>> +		.name = "DP",
>> +	},
>>   
>>   	/* Miscellaneous external connector */
>>   	[EXTCON_DOCK] = {
>> @@ -270,6 +275,7 @@ static bool is_extcon_property_supported(unsigned int id,
>>   		switch (prop) {
>>   		case EXTCON_PROP_USB_ID:
>>   		case EXTCON_PROP_USB_VBUS:
>> +		case EXTCON_PROP_TYPEC_POLARITY:
>>   			return true;
>>   		default:
>>   			break;
>> @@ -547,6 +553,26 @@ int extcon_get_cable_property(struct extcon_dev *edev, unsigned int id,
>>   				enum extcon_property prop,
>>   				union extcon_property_value *val)
>>   {
>> +	struct extcon_cable *cable;
>> +	int index;
>> +
>> +	if (!edev)
>> +		return -EINVAL;
>> +
>> +	/* Check the property whether is supported or not */
>> +	if (!is_extcon_property_supported(id, prop))
>> +		return -EINVAL;
>> +
>> +	/* Find the cable index of external connector by using id */
>> +	index = find_cable_index_by_id(edev, id);
>> +	if (index < 0)
>> +		return index;
>> +
>> +	/* Store the property value */
>> +	cable = &edev->cables[index];
>> +
>> +	val->intval = cable->propval[prop].intval;
>> +
>>   	return 0;
>>   }
>>   
>> diff --git a/include/linux/extcon.h b/include/linux/extcon.h
>> index f6f0a8d..50ef87f 100644
>> --- a/include/linux/extcon.h
>> +++ b/include/linux/extcon.h
>> @@ -77,6 +77,7 @@ enum extcon_type {
>>   #define EXTCON_DISP_MHL		41	/* Mobile High-Definition Link */
>>   #define EXTCON_DISP_DVI		42	/* Digital Visual Interface */
>>   #define EXTCON_DISP_VGA		43	/* Video Graphics Array */
>> +#define EXTCON_DISP_DP		44	/* DisplayPort */
>>   
>>   /* Miscellaneous external connector */
>>   #define EXTCON_DOCK		60
>> @@ -108,9 +109,13 @@ enum extcon_property {
>>   	 * - EXTCON_PROP_USB_USB
>>   	 * @type:	integer (int value)
>>   	 * @value:	0 (low) or 1 (high)
>> +	 * - EXTCON_PROP_TYPEC_POLARITY,
>> +	 * @type:	integer (int value)
>> +	 * @value:	0 (normal) or 1 (flip)
>>   	 */
>>   	EXTCON_PROP_USB_ID = 0,
>>   	EXTCON_PROP_USB_VBUS,
>> +	EXTCON_PROP_TYPEC_POLARITY,
>>   
>>   	/* Properties of EXTCON_TYPE_CHG. */
>>   	/* Properties of EXTCON_TYPE_JACK. */
>> @@ -225,6 +230,14 @@ extern int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id);
>>   extern int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
>>   				   bool cable_state);
>>   
>> +extern int extcon_get_cable_property(struct extcon_dev *edev, unsigned int id,
>> +				     enum extcon_property prop,
>> +				     union extcon_property_value *val);
>> +
>> +extern int extcon_set_cable_property(struct extcon_dev *edev, unsigned int id,
>> +				     enum extcon_property prop,
>> +				     union extcon_property_value val);
>> +
>>   /*
>>    * Following APIs are to monitor every action of a notifier.
>>    * Registrar gets notified for every external port of a connection device.
>>
>
>
>