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8341720642
Userspace expects to receive tool type and serial number information for the active pen in the very first kernel report, if such data is supported by the hardware. While this expectation is not an issue for EMR devices, AES sensors will often send several packets worth of in- range data before relaying type/serial data to the kernel. Sending this data "late" can result in proximity-tracking issues by xf86-input-wacom, or an inability to distinguish different pens by input-wacom. Options for dealing with this situation include ignoring reports from the tablet until we get the necessary data, or using the information from the last-seen pen instead of the (eventual) real data. Neither option is particularly attractive: the former results in truncated strokes and the latter causes issues with switching between pens. This commit instead opts to queue up events with missing information until we receive a report which contains it. At that point, we can update the driver's state variables (id[0] and serial[0]) and replay the queued events. Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.