On Mon, May 3, 2021 at 11:39 AM Benjamin Tissoires
[off-list ref] wrote:

On Mon, May 3, 2021 at 11:11 AM Jiri Kosina [off-list ref] wrote:

quoted

On Tue, 20 Apr 2021, наб wrote:

quoted

quoted

This patchset adds support for stylus-on-touchscreen devices as found on
the OneMix 3 Pro and Dell Inspiron 15 7000 2-in-1 (7591), among others;
with it, they properly behave like a drawing tablet.

Patches 2 and 4 funxionally depend on patch 1.
Patch 4 needs patch 3 to apply.

The output of this patchset and the need for a kernel, rather than
userspace, patch was previously discussed here:
  https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/558#note_792834

Changes in v2:
Patch 4 now ANDs the secondary button with the tip switch,
since it's otherwise borderline useless to the user.

Ahelenia Ziemiańska (4):
  HID: multitouch: require Finger field to mark Win8 reports as MT
  HID: multitouch: set Stylus suffix for Stylus-application devices, too
  HID: input: replace outdated HID numbers+comments with macros
  HID: input: work around Win8 stylus-on-touchscreen reporting

 drivers/hid/hid-input.c      | 54 ++++++++++++++++++++++++++++++++++--
 drivers/hid/hid-multitouch.c | 18 +++++++-----
 2 files changed, 62 insertions(+), 10 deletions(-)

--
2.20.1

Bumping this after a monthish ‒ is it missing something? Am I?

Benjamin had concerns about regressions and wanted to run a full battery
of testing on it.

Benjamin, is there any outcome of that, please?

Sorry, no real outcome here.

I ran the test suite, and there were no errors, until I realized that
there are no tests regarding tablets, so it can't detect any
regressions here.
And then, the usual happens, no time to actually work on the test suite... :(

I'll do a "normal" review soon (i.e. today)

So I did a quick pass at the patches:
- 1/4 -> I think this one is safe and could go as it is, maybe with
CC: stable on it. Any regressions should have been caught by the
testsuite, so that's a good one.
- 2/4 and 3/4 -> Ack on those 2 too, note stable material, but not
necessary v5.13 material
- 4/4 -> I honestly have no idea if the patch is correct or not. I
would hold on this one until we have proper tests for those.

Jiri, would you be ok to split the series as this?

наб, would you be OK to work on the test suite at
https://gitlab.freedesktop.org/libevdev/hid-tools so we can move
forward for your last patch?

The problem I see on the last patch is that it is touching a generic
path and is not trivial. So adding tests would have 3 benefits:
- we ensure we are doing the correct thing
- we ensure we are not breaking existing devices (to some extent,
given that the tests are non written for the tablets)
- we ensure we are not breaking that in the future.

Cheers,
Benjamin