linux-kernel - Re: [PATCH v2] HID: logitech-dj: allow mice to report multimedia keycodes

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Date: Wed, 3 Apr 2024 15:54:16 +0200
From: Hans de Goede <hdegoede@...hat.com>
To: Jiri Kosina <jikos@...nel.org>, Yaraslau Furman <yaro330@...il.com>
Cc: Benjamin Tissoires <benjamin.tissoires@...hat.com>,
 Lucas Zampieri <lzampier@...hat.com>, Filipe Laíns
 <lains@...eup.net>,
 "open list:HID LOGITECH DRIVERS" <linux-input@...r.kernel.org>,
 open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] HID: logitech-dj: allow mice to report multimedia
 keycodes

Hi All,

On 4/3/24 1:38 PM, Jiri Kosina wrote:
> On Thu, 22 Feb 2024, Yaraslau Furman wrote:
> 
>> Multimedia buttons can be bound to the mouse's extra keys in Windows application.
>> Let Linux receive those keycodes.
>>
>> Signed-off-by: Yaraslau Furman <yaro330@...il.com>
>> ---
>>  drivers/hid/hid-logitech-dj.c | 4 +---
>>  1 file changed, 1 insertion(+), 3 deletions(-)
>>
>> diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
>> index e6a8b6d8eab7..3c3c497b6b91 100644
>> --- a/drivers/hid/hid-logitech-dj.c
>> +++ b/drivers/hid/hid-logitech-dj.c
>> @@ -965,9 +965,7 @@ static void logi_hidpp_dev_conn_notif_equad(struct hid_device *hdev,
>>  		}
>>  		break;
>>  	case REPORT_TYPE_MOUSE:
>> -		workitem->reports_supported |= STD_MOUSE | HIDPP;
>> -		if (djrcv_dev->type == recvr_type_mouse_only)
>> -			workitem->reports_supported |= MULTIMEDIA;
>> +		workitem->reports_supported |= STD_MOUSE | HIDPP | MULTIMEDIA;
>>  		break;
> 
> CCing Hans who introduced this explicit check back in 3ed224e273ac 
> ("HID: logitech-dj: Fix 064d:c52f receiver support").
> Should it be made device-specific?

Jiri, thank you for bringing this to my attention. If mice attached
to other receivers can send multi-media key presses too, then I believe
that dropping the if (djrcv_dev->type == recvr_type_mouse_only) check
is fine.

IOW, the patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans