linux-kernel - Re: [PATCH] Support intel-vbtn based tablet mode switch

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Date:   Tue, 23 Jan 2018 13:42:45 +0100
From:   Marco Martin <notmart@...il.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Pali Rohár <pali.rohar@...il.com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Bhushan Shah <bhush94@...il.com>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Mario Limonciello <mario.limonciello@...l.com>,
        Mario Limonciello <mario_limonciello@...l.com>
Subject: Re: [PATCH] Support intel-vbtn based tablet mode switch

On Tue, Jan 23, 2018 at 12:46 AM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
>> @@ -81,6 +86,7 @@ static void notify_handler(acpi_handle handle, u32 event, void *context)
>>                       return;
>>               }
>>       } else if (sparse_keymap_report_event(priv->input_dev, event, 1, true)) {
>> +             input_sync(priv->input_dev);
>
> I do not understand why this is needed, as sparse keymap should issue
> sync for you. From sparse_keymap_report_entry():

indeed, I was testing on a 4.13 build, the sync there was pushed in
november only for 4.14, i've rebuilt it now on 4.14 and my sync is not
needed anymore

> Can be shorter:
>
>                         input_report_switch(priv->input_dev, SW_TABLET_MODE,
>                                         obj->integer.value & TABLET_MODE_FLAG);
>
> You also need:
>
>                         input_sync(priv->input_dev);

in v3 this shorter version and doesn't report the capability if it's
the wrong type

--
Marco Martin