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SubjectRe: [PATCH] input: mt: Interface and MT_TOOL documentation updates
On Thu, Dec 09, 2010 at 10:22:12PM +0100, Henrik Rydberg wrote:
> The recent input-mt interface changes together with
> recent discussions about pen and touch and support
> for legacy multitouch pads suggest that the documentation
> on MT tool types be expanded. This patch adds references
> to the new interface, and adds a section for MT_TOOL types,
> in particular documenting the use of MT_TOOL_ENVELOPE.
> Signed-off-by: Henrik Rydberg <>

The explanation of the new types makes sense to me... Do you think we
could add some comments directly to input.h?

> @@ -247,21 +249,34 @@ ABS_MT_TOOL_TYPE
> The type of approaching tool. A lot of kernel drivers cannot distinguish
> between different tool types, such as a finger or a pen. In such cases, the
> event should be omitted. The protocol currently supports MT_TOOL_FINGER and


> +MT_TOOL_PEN and MT_TOOL_ENVELOPE [2]. For type B devices, this event is
> +handled by input core, via the input_mt interface.
> +



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