linux-kernel - Re: [v2] input: drv260x: Add TI drv260x haptics driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5adf0339146a7b655a77053195aa892c.squirrel@mungewell.org>
Date:	Mon, 28 Jul 2014 13:59:34 -0400
From:	simon@...gewell.org
To:	"Dan Murphy" <dmurphy@...com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	"Michal Malý" 
	<madcatxster@...oid-pointer.net>,
	"Elias Vanderstuyft" <elias.vds@...il.com>
Subject: Re: [v2] input: drv260x: Add TI drv260x haptics driver


>> The initial driver supports the devices
>> real time playback mode.  But the device
>> has additional wave patterns in ROM.
>
> As it presented the device appears to be a memoryless device, however
> you present it to the rest of the system as if it can support playback
> of multiple effects simultaneously, which is incorrect.
>
> My guess that you need to engage the memoryless input library to schedule
> handling multiple effects for your device, including ramping up, ramping
> down, stopping playback when effects runs out, etc.

Hi Dan,
Elias and Michal (cc'ed) are working on a kernel/userland library to
handle sending multiple force feedback signals to 'simple' devices,
perhaps you should engage with them.

Simon

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/