Re: [ibm-acpi-devel] [PATCH v3 0/7] Support inhibiting input devices
On Sun, Jun 07, 2020 at 10:24:14PM +0200, Pavel Machek wrote: > On Fri 2020-06-05 19:33:28, Andrzej Pietrasiewicz wrote: > > Userspace might want to implement a policy to temporarily disregard input > > from certain devices. > > Wow, you certainly cc a lot of lists. > > > An example use case is a convertible laptop, whose keyboard can be folded > > under the screen to create tablet-like experience. The user then must hold > > the laptop in such a way that it is difficult to avoid pressing the keyboard > > keys. It is therefore desirable to temporarily disregard input from the > > keyboard, until it is folded back. This obviously is a policy which should > > be kept out of the kernel, but the kernel must provide suitable means to > > implement such a policy. > > > > Due to interactions with suspend/resume, a helper has been added for drivers > > to decide if the device is being used or not (PATCH 1/7) and it has been > > applied to relevant drivers (PATCH 2,4,5,6/7). > > But is that a right way to implement it? > > We want this for cellphones, too -- touchscreen should be disabled > while the device is locked in the pocket -- but we really want the > touchscreen hardware to be powered down in that case (because it keeps > SoC busy and eats a _lot_ of electricity). > > But simplistic "receive an event and then drop it if device is > inhibited" does not allow that... I do not think you read the entirety of this patch series... Thanks. -- Dmitry ___ ibm-acpi-devel mailing list ibm-acpi-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
Re: [ibm-acpi-devel] [PATCH v3 0/7] Support inhibiting input devices
On Fri 2020-06-05 19:33:28, Andrzej Pietrasiewicz wrote: > Userspace might want to implement a policy to temporarily disregard input > from certain devices. Wow, you certainly cc a lot of lists. > An example use case is a convertible laptop, whose keyboard can be folded > under the screen to create tablet-like experience. The user then must hold > the laptop in such a way that it is difficult to avoid pressing the keyboard > keys. It is therefore desirable to temporarily disregard input from the > keyboard, until it is folded back. This obviously is a policy which should > be kept out of the kernel, but the kernel must provide suitable means to > implement such a policy. > > Due to interactions with suspend/resume, a helper has been added for drivers > to decide if the device is being used or not (PATCH 1/7) and it has been > applied to relevant drivers (PATCH 2,4,5,6/7). But is that a right way to implement it? We want this for cellphones, too -- touchscreen should be disabled while the device is locked in the pocket -- but we really want the touchscreen hardware to be powered down in that case (because it keeps SoC busy and eats a _lot_ of electricity). But simplistic "receive an event and then drop it if device is inhibited" does not allow that... Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html signature.asc Description: Digital signature ___ ibm-acpi-devel mailing list ibm-acpi-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
