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Message-ID: <Sv9QmUty0l3Mfamc_yPNDn845NI5FtXorIvBK_ZUmnvwZliG3XxY4oHzKPXyqveCnhS5qUU52upJfccI07L2AEyVy75wA-7D4ZbE3Fz3U9s=@protonmail.com>
Date: Tue, 22 Oct 2019 17:16:39 +0000
From: Mazin Rezk <mnrzk@...tonmail.com>
To: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc: "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
"jikos@...nel.org" <jikos@...nel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Filipe Laíns <lains@...hlinux.org>,
"mnrzk@...tonmail.com" <mnrzk@...tonmail.com>
Subject: Re: [PATCH v7 1/3] HID: logitech-hidpp: Support translations from short to long reports
On Tuesday, October 22, 2019 6:15 AM, Benjamin Tissoires <benjamin.tissoires@...hat.com> wrote:
> Hi Mazin,
>
> On Sun, Oct 20, 2019 at 6:41 AM Mazin Rezk mnrzk@...tonmail.com wrote:
>
> > This patch allows short reports to be translated into long reports.
> > hidpp_validate_device now returns a u8 instead of a bool which represents
> > the supported reports. The corresponding bits (i.e.
> > HIDPP_REPORT_*_SUPPORTED) are set if an HID++ report is supported.
> > If a short report is being sent and the device does not support it, it is
> > instead sent as a long report.
> > Thanks,
> > Mazin
> >
> > Signed-off-by: Mazin Rezk mnrzk@...tonmail.com
> >
> > -----------------------------------------------
>
> Yep, I like this patch much better.
>
> I also tested the 0xb012 MX Master, and it now works like a charm :)
>
> nitpick: can you squash the next patch into this one? Because to be
> useful, this patch really need one or 2 supported devices.
I'll do that in v8 but I'm just going to wait until this patch is tested
more so I can see what other changes I need to make before the patch is
finalised.
Thanks,
Mazin
>
> Cheers,
> Benjamin
>
> > drivers/hid/hid-logitech-hidpp.c | 25 +++++++++++++++++++------
> > 1 file changed, 19 insertions(+), 6 deletions(-)
> > diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
> > index e9bba282f9c1..ee604b17514f 100644
> > --- a/drivers/hid/hid-logitech-hidpp.c
> > +++ b/drivers/hid/hid-logitech-hidpp.c
> > @@ -49,6 +49,10 @@ MODULE_PARM_DESC(disable_tap_to_click,
> > #define HIDPP_REPORT_LONG_LENGTH 20
> > #define HIDPP_REPORT_VERY_LONG_MAX_LENGTH 64
> > +#define HIDPP_REPORT_SHORT_SUPPORTED BIT(0)
> > +#define HIDPP_REPORT_LONG_SUPPORTED BIT(1)
> > +#define HIDPP_REPORT_VERY_LONG_SUPPORTED BIT(2)
> > +
> > #define HIDPP_SUB_ID_CONSUMER_VENDOR_KEYS 0x03
> > #define HIDPP_SUB_ID_ROLLER 0x05
> > #define HIDPP_SUB_ID_MOUSE_EXTRA_BTNS 0x06
> > @@ -183,6 +187,7 @@ struct hidpp_device {
> >
> > unsigned long quirks;
> > unsigned long capabilities;
> >
> >
> > - u8 supported_reports;
> >
> > struct hidpp_battery battery;
> > struct hidpp_scroll_counter vertical_wheel_counter;
> >
> >
> >
> > @@ -340,6 +345,11 @@ static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
> > struct hidpp_report *message;
> > int ret, max_count;
> >
> > - /* Send as long report if short reports are not supported. */
> >
> >
> > - if (report_id == REPORT_ID_HIDPP_SHORT &&
> >
> >
> > - !(hidpp_dev->supported_reports & HIDPP_REPORT_SHORT_SUPPORTED))
> >
> >
> > - report_id = REPORT_ID_HIDPP_LONG;
> >
> >
> > - switch (report_id) {
> > case REPORT_ID_HIDPP_SHORT:
> > max_count = HIDPP_REPORT_SHORT_LENGTH - 4;
> >
> >
> >
> > @@ -3458,10 +3468,11 @@ static int hidpp_get_report_length(struct hid_device *hdev, int id)
> > return report->field[0]->report_count + 1;
> > }
> > -static bool hidpp_validate_device(struct hid_device *hdev)
> > +static u8 hidpp_validate_device(struct hid_device *hdev)
> > {
> > struct hidpp_device *hidpp = hid_get_drvdata(hdev);
> >
> > - int id, report_length, supported_reports = 0;
> >
> >
> >
> > - int id, report_length;
> >
> >
> > - u8 supported_reports = 0;
> >
> > id = REPORT_ID_HIDPP_SHORT;
> > report_length = hidpp_get_report_length(hdev, id);
> >
> >
> >
> > @@ -3469,7 +3480,7 @@ static bool hidpp_validate_device(struct hid_device *hdev)
> > if (report_length < HIDPP_REPORT_SHORT_LENGTH)
> > goto bad_device;
> >
> > - supported_reports++;
> >
> >
> >
> > - supported_reports |= HIDPP_REPORT_SHORT_SUPPORTED;
> > }
> >
> > id = REPORT_ID_HIDPP_LONG;
> >
> >
> >
> > @@ -3478,7 +3489,7 @@ static bool hidpp_validate_device(struct hid_device *hdev)
> > if (report_length < HIDPP_REPORT_LONG_LENGTH)
> > goto bad_device;
> >
> > - supported_reports++;
> >
> >
> >
> > - supported_reports |= HIDPP_REPORT_LONG_SUPPORTED;
> > }
> >
> > id = REPORT_ID_HIDPP_VERY_LONG;
> >
> >
> >
> > @@ -3488,7 +3499,7 @@ static bool hidpp_validate_device(struct hid_device *hdev)
> > report_length > HIDPP_REPORT_VERY_LONG_MAX_LENGTH)
> > goto bad_device;
> >
> > - supported_reports++;
> >
> >
> >
> > - supported_reports |= HIDPP_REPORT_VERY_LONG_SUPPORTED;
> > hidpp->very_long_report_length = report_length;
> > }
> >
> >
> >
> > @@ -3536,7 +3547,9 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id id)
> > /* Make sure the device is HID++ capable, otherwise treat as generic HID
> > */
> >
> > - if (!hidpp_validate_device(hdev)) {
> >
> >
> >
> > - hidpp->supported_reports = hidpp_validate_device(hdev);
> >
> >
> > -
> > - if (!hidpp->supported_reports) {
> > hid_set_drvdata(hdev, NULL);
> > devm_kfree(&hdev->dev, hidpp);
> > return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
> >
> >
> >
> > --
> > 2.23.0
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