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

[Chanwoo Choi]

Hi,

2016-07-23 6:40 GMT+09:00 Guenter Roeck <groeck at google.com>:
> On Fri, Jul 22, 2016 at 2:29 AM, Chanwoo Choi <cw00.choi at samsung.com> 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
>>
>
> Some additional feedback:
>
> - IS_PROPERTY(), is_extcon_property_supported():
>    The logic should probably be
>         if (EXTCON_TYPE_##name & type) {
>    and
>         if (!(extcon_info[id].type & type)) {
>
>   (logical & instead of logical | )
>
> - extcon_get_property():
>   - ret is not initialized.
>   - case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX:
>     misses a break statement

Thanks for report. I'll check it.

Thanks,
Chanwoo Choi

>
> Guenter
>
>> 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 at rock-chips.com>
>>>
>>> Signed-off-by: Chris Zhong <zyw at rock-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.
>>>
>>