linux-kernel - Re: [patch v2 1/1] HID:hid-multitouch: Add ELAN prouction request when resume

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Date:	Thu, 9 Aug 2012 22:20:28 +0800
From:	劉嘉駿 <scott.liu@....com.tw>
To:	Benjamin Tissoires <benjamin.tissoires@...il.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Jiri Kosina <jkosina@...e.cz>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, eleghost@...il.com,
	DGD 劉嘉駿 <scott.liu@....com.tw>
Subject: Re: [patch v2 1/1] HID:hid-multitouch: Add ELAN prouction request when resume


Hi Benjamin:
	Revision will be update later. 



Benjamin Tissoires <benjamin.tissoires@...il.com> 於 2012/8/9 下午7:27 寫道：

> Hi Scott,
> 
> we are getting closer. Just a few nitpicks:
> 
> On Thu, Aug 9, 2012 at 11:22 AM, Scott Liu <scott.liu@....com.tw> wrote:
>> Some of ELAN's production need to with set_idle commmand when reusme.
> 
> reusme -> resume
> 
>> 
>> Signed-off-by: Scott Liu <scott.liu@....com.tw>
>> ---
>> drivers/hid/hid-ids.h        |    3 +++
>> drivers/hid/hid-multitouch.c |   20 ++++++++++++++++++++
>> 2 files changed, 23 insertions(+)
>> 
>> diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
>> index 41c34f2..a4d810c 100644
>> --- a/drivers/hid/hid-ids.h
>> +++ b/drivers/hid/hid-ids.h
>> @@ -829,4 +829,7 @@
>> #define USB_VENDOR_ID_PRIMAX   0x0461
>> #define USB_DEVICE_ID_PRIMAX_KEYBOARD  0x4e05
>> 
>> +#define USB_VENDOR_ID_ELAN  0x04f3
>> +#define USB_DEVICE_ID_ELAN_MOCCA    0x000a
>> +
> 
> We try to keep the list alphabetically sorted. So it should go just
> before USB_VENDOR_ID_ELECOM.
> 
> Also, the device you sent to me has the PID 0x0732 and is behaving the
> same way (need to call the mt_reset command).
> Is 0x000a a mistake or do all of your product behave like this?
> If it's the latter, then we may purely remove the PID test.
> 
> Jiri, any ideas?


No, not all ELAN production needs set_idle command after resume, only for previous chipset. 


Thanks.
Scott

> 
>> #endif
>> diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
>> index 59c8b5c..b06b7d3 100644
>> --- a/drivers/hid/hid-multitouch.c
>> +++ b/drivers/hid/hid-multitouch.c
>> @@ -767,6 +767,25 @@ static int mt_reset_resume(struct hid_device *hdev)
>>        mt_set_input_mode(hdev);
>>        return 0;
>> }
>> +
>> +static int mt_resume(struct hid_device *hdev)
>> +{
>> +       if (hdev->vendor == USB_VENDOR_ID_ELAN &&
>> +               hdev->product == USB_DEVICE_ID_ELAN_MOCCA) {
>> +
>> +               struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
>> +               struct usb_host_interface *interface = intf->cur_altsetting;
>> +               struct usb_device *dev = hid_to_usb_dev(hdev);
>> +
>> +               usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
>> +                                               HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
> 
> As we are on it, this line is more than 80 characters. Tabs are 8
> characters length.
> 
>> +                                               0, interface->desc.bInterfaceNumber,
>> +                                               NULL, 0, USB_CTRL_SET_TIMEOUT);
>> +    }
> 
> spaces instead of tabs.
> 
>> +
>> +    return 0;
> 
> idem, spaces instead of tabs.
> 
> Anyway, I really appreciate your efforts Scott.
> 
> Cheers,
> Benjamin
> 
> 
>> +}
>> +
>> #endif
>> 
>> static void mt_remove(struct hid_device *hdev)
>> @@ -1092,6 +1111,7 @@ static struct hid_driver mt_driver = {
>>        .event = mt_event,
>> #ifdef CONFIG_PM
>>        .reset_resume = mt_reset_resume,
>> +       .resume = mt_resume,
>> #endif
>> };
>> 
>> --
>> 1.7.9.5
>> 
> i

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