linux-kernel - Re: [PATCH] HID: rmi: Disable populating F30 when the touchpad has physical buttons

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Message-ID: <55809739.4000207@synaptics.com>
Date:	Tue, 16 Jun 2015 14:38:01 -0700
From:	Andrew Duggan <aduggan@...aptics.com>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
CC:	<linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Jiri Kosina <jkosina@...e.cz>,
	Peter Hutterer <peter.hutterer@...-t.net>
Subject: Re: [PATCH] HID: rmi: Disable populating F30 when the touchpad has
 physical buttons

On 06/16/2015 02:26 PM, Benjamin Tissoires wrote:
> Hi Andrew,
>
> On Jun 16 2015 or thereabouts, Andrew Duggan wrote:
>> Physical buttons do not use F30 to report their state and in some cases the
>> data reported in F30 is incorrect and inconsistent with what is reported by
>> the HID descriptor. When physical buttons are present, ignore F30 and let
>> hid-input report buttons based on what is defined in the HID descriptor.
>>
>> Signed-off-by: Andrew Duggan <aduggan@...aptics.com>
>> ---
> Thanks for the patch.
> This one is related to:
> https://bugzilla.redhat.com/show_bug.cgi?id=1227891
> and http://bugs.freedesktop.org/show_bug.cgi?id=90356
>
> Andrew, can you confirm that with this patch, INPUT_PROP_BUTTONPAD is not
> set for the Razer Blade touchpad?

Yes, I was able to reproduce the bug and confirm the fix on a Razer 
Blade system.

> If so, then this is:
> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
>
> Cheers,
> Benjamin
>
>>   drivers/hid/hid-rmi.c | 9 ++++++---
>>   1 file changed, 6 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
>> index 368ffdf..721f7f9 100644
>> --- a/drivers/hid/hid-rmi.c
>> +++ b/drivers/hid/hid-rmi.c
>> @@ -1013,6 +1013,7 @@ static int rmi_populate_f30(struct hid_device *hdev)
>>   
>>   static int rmi_populate(struct hid_device *hdev)
>>   {
>> +	struct rmi_data *data = hid_get_drvdata(hdev);
>>   	int ret;
>>   
>>   	ret = rmi_scan_pdt(hdev);
>> @@ -1033,9 +1034,11 @@ static int rmi_populate(struct hid_device *hdev)
>>   		return ret;
>>   	}
>>   
>> -	ret = rmi_populate_f30(hdev);
>> -	if (ret)
>> -		hid_warn(hdev, "Error while initializing F30 (%d).\n", ret);
>> +	if (!(data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS)) {
>> +		ret = rmi_populate_f30(hdev);
>> +		if (ret)
>> +			hid_warn(hdev, "Error while initializing F30 (%d).\n", ret);
>> +	}
>>   
>>   	return 0;
>>   }
>> -- 
>> 2.1.4
>>

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