Sorry, no html now. On Tue, Dec 3, 2013 at 3:01 PM, Nestor Lopez Casado <nlopezcasad@xxxxxxxxxxxx> wrote: > > > > > On Tue, Dec 3, 2013 at 1:51 PM, Jiri Kosina <jkosina@xxxxxxx> wrote: >> >> On Tue, 3 Dec 2013, Olivier Gay wrote: >> >> > Without hidraw driver, we get this: >> > >> > <3>[ 210.131988] logitech-djreceiver 0003:046D:C52B.0005: claimed by >> > neither input, hiddev nor hidraw >> > <3>[ 210.132202] logitech-djreceiver 0003:046D:C52B.0005: >> > logi_dj_probe:hid_hw_start returned error >> > >> > In logi_dj_probe, we call hid_hw_start with HID_CONNECT_DEFAULT >> > argument and if hidraw driver is not present, the call fails and we >> > return an error in logi_dj_probe. >> > >> > > It's clear that without hidraw it's not possible to change the pairing >> > > from userspace, but I fail to see why probing the receiver should be >> > > affected? >> > >> > As of today, hid-logitech-dj.c depends on hidraw API to work. All HID >> > reports sent to control / configure the receiver are sent using hidraw >> > API. That's why we fail logi_dj_probe if we cannot connect to hidraw. >> >> Hmm, so unifying receiver is not claimed by hid-input at all? >> (HID_CONNECT_DEFAULT also contains HID_CONNECT_HIDINPUT) How so? >> >> (again, I will not be able to test it with my receiver up until the day >> after tomorrow). > > The unifying receiver has 3 usb interfaces. When hid-logitech-dj driver is loaded, interfaces 0 and 1 are discarded. > > Interface 2 consists of a hid class interface with 3 collections, each of which sports the 'vendor' usage, thus, there is no reason for hid_input to claim any of them. On the other hand, hidraw has no issue in claiming the collections, even if they are 'vendor'. As of today, hid-logitech-dj uses hidraw api to send configuration/control reports to interface 2 of the Unifying receiver. > > Without the hid-logitech-dj driver, interfaces 0 and 1 are claimed by hid-input, as they correspond to a keyboard and a mouse. But that is not relevant to the discussion. >> >> >> Thanks, >> >> -- >> Jiri Kosina >> SUSE Labs > > Cheers, > -nestor > -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
