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Date: Fri, 1 Dec 2023 15:41:27 +1000
From: Peter Hutterer <peter.hutterer@...-t.net>
To: Benjamin Tissoires <bentiss@...nel.org>
Cc: Jiri Kosina <jikos@...nel.org>,
Benjamin Tissoires <benjamin.tissoires@...hat.com>,
Shuah Khan <shuah@...nel.org>, linux-input@...r.kernel.org,
linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/12] selftests/hid: tablets: add variants of states
with buttons
On Wed, Nov 29, 2023 at 04:24:34PM +0100, Benjamin Tissoires wrote:
> Turns out that there are transitions that are unlikely to happen:
> for example, having both the tip switch and a button being changed
> at the same time (in the same report) would require either a very talented
> and precise user or a very bad hardware with a very low sampling rate.
>
> So instead of manually building the button test by hand and forgetting
> about some cases, let's reuse the state machine and transitions we have.
>
> This patch only adds the states and the valid transitions. The actual
> tests will be replaced later.
>
> Signed-off-by: Benjamin Tissoires <bentiss@...nel.org>
> ---
> tools/testing/selftests/hid/tests/test_tablet.py | 170 +++++++++++++++++++++--
> 1 file changed, 157 insertions(+), 13 deletions(-)
>
> diff --git a/tools/testing/selftests/hid/tests/test_tablet.py b/tools/testing/selftests/hid/tests/test_tablet.py
> index 83f6501fe984..80269d1a0f0a 100644
> --- a/tools/testing/selftests/hid/tests/test_tablet.py
> +++ b/tools/testing/selftests/hid/tests/test_tablet.py
> @@ -21,22 +21,66 @@ logger = logging.getLogger("hidtools.test.tablet")
> class PenState(Enum):
> """Pen states according to Microsoft reference:
> https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/windows-pen-states
> - """
>
> - PEN_IS_OUT_OF_RANGE = (False, None)
> - PEN_IS_IN_RANGE = (False, libevdev.EV_KEY.BTN_TOOL_PEN)
> - PEN_IS_IN_CONTACT = (True, libevdev.EV_KEY.BTN_TOOL_PEN)
> - PEN_IS_IN_RANGE_WITH_ERASING_INTENT = (False, libevdev.EV_KEY.BTN_TOOL_RUBBER)
> - PEN_IS_ERASING = (True, libevdev.EV_KEY.BTN_TOOL_RUBBER)
> + We extend it with the various buttons when we need to check them.
> + """
>
> - def __init__(self, touch, tool):
It'd be nice to have a comment here what the False refers to. Even
nicer would be an enum class BtnTouch.DOWN so the code is instantly
readable :)
Cheers,
Peter
> + PEN_IS_OUT_OF_RANGE = (False, None, None)
> + PEN_IS_IN_RANGE = (False, libevdev.EV_KEY.BTN_TOOL_PEN, None)
> + PEN_IS_IN_RANGE_WITH_BUTTON = (
> + False,
> + libevdev.EV_KEY.BTN_TOOL_PEN,
> + libevdev.EV_KEY.BTN_STYLUS,
> + )
> + PEN_IS_IN_RANGE_WITH_SECOND_BUTTON = (
> + False,
> + libevdev.EV_KEY.BTN_TOOL_PEN,
> + libevdev.EV_KEY.BTN_STYLUS2,
> + )
> + PEN_IS_IN_CONTACT = (True, libevdev.EV_KEY.BTN_TOOL_PEN, None)
> + PEN_IS_IN_CONTACT_WITH_BUTTON = (
> + True,
> + libevdev.EV_KEY.BTN_TOOL_PEN,
> + libevdev.EV_KEY.BTN_STYLUS,
> + )
> + PEN_IS_IN_CONTACT_WITH_SECOND_BUTTON = (
> + True,
> + libevdev.EV_KEY.BTN_TOOL_PEN,
> + libevdev.EV_KEY.BTN_STYLUS2,
> + )
> + PEN_IS_IN_RANGE_WITH_ERASING_INTENT = (False, libevdev.EV_KEY.BTN_TOOL_RUBBER, None)
> + PEN_IS_IN_RANGE_WITH_ERASING_INTENT_WITH_BUTTON = (
> + False,
> + libevdev.EV_KEY.BTN_TOOL_RUBBER,
> + libevdev.EV_KEY.BTN_STYLUS,
> + )
> + PEN_IS_IN_RANGE_WITH_ERASING_INTENT_WITH_SECOND_BUTTON = (
> + False,
> + libevdev.EV_KEY.BTN_TOOL_RUBBER,
> + libevdev.EV_KEY.BTN_STYLUS2,
> + )
> + PEN_IS_ERASING = (True, libevdev.EV_KEY.BTN_TOOL_RUBBER, None)
> + PEN_IS_ERASING_WITH_BUTTON = (
> + True,
> + libevdev.EV_KEY.BTN_TOOL_RUBBER,
> + libevdev.EV_KEY.BTN_STYLUS,
> + )
> + PEN_IS_ERASING_WITH_SECOND_BUTTON = (
> + True,
> + libevdev.EV_KEY.BTN_TOOL_RUBBER,
> + libevdev.EV_KEY.BTN_STYLUS2,
> + )
> +
> + def __init__(self, touch, tool, button):
> self.touch = touch
> self.tool = tool
> + self.button = button
>
> @classmethod
> def from_evdev(cls, evdev) -> "PenState":
> touch = bool(evdev.value[libevdev.EV_KEY.BTN_TOUCH])
> tool = None
> + button = None
> if (
> evdev.value[libevdev.EV_KEY.BTN_TOOL_RUBBER]
> and not evdev.value[libevdev.EV_KEY.BTN_TOOL_PEN]
> @@ -53,7 +97,17 @@ class PenState(Enum):
> ):
> raise ValueError("2 tools are not allowed")
>
> - return cls((touch, tool))
> + # we take only the highest button in account
> + for b in [libevdev.EV_KEY.BTN_STYLUS, libevdev.EV_KEY.BTN_STYLUS2]:
> + if bool(evdev.value[b]):
> + button = b
> +
> + # the kernel tends to insert an EV_SYN once removing the tool, so
> + # the button will be released after
> + if tool is None:
> + button = None
> +
> + return cls((touch, tool, button))
>
> def apply(self, events) -> "PenState":
> if libevdev.EV_SYN.SYN_REPORT in events:
> @@ -62,6 +116,8 @@ class PenState(Enum):
> touch_found = False
> tool = self.tool
> tool_found = False
> + button = self.button
> + button_found = False
>
> for ev in events:
> if ev == libevdev.InputEvent(libevdev.EV_KEY.BTN_TOUCH):
> @@ -76,12 +132,22 @@ class PenState(Enum):
> if tool_found:
> raise ValueError(f"duplicated BTN_TOOL_* in {events}")
> tool_found = True
> - if ev.value:
> - tool = ev.code
> - else:
> - tool = None
> + tool = ev.code if ev.value else None
> + elif ev in (
> + libevdev.InputEvent(libevdev.EV_KEY.BTN_STYLUS),
> + libevdev.InputEvent(libevdev.EV_KEY.BTN_STYLUS2),
> + ):
> + if button_found:
> + raise ValueError(f"duplicated BTN_STYLUS* in {events}")
> + button_found = True
> + button = ev.code if ev.value else None
>
> - new_state = PenState((touch, tool))
> + # the kernel tends to insert an EV_SYN once removing the tool, so
> + # the button will be released after
> + if tool is None:
> + button = None
> +
> + new_state = PenState((touch, tool, button))
> assert (
> new_state in self.valid_transitions()
> ), f"moving from {self} to {new_state} is forbidden"
> @@ -97,14 +163,20 @@ class PenState(Enum):
> return (
> PenState.PEN_IS_OUT_OF_RANGE,
> PenState.PEN_IS_IN_RANGE,
> + PenState.PEN_IS_IN_RANGE_WITH_BUTTON,
> + PenState.PEN_IS_IN_RANGE_WITH_SECOND_BUTTON,
> PenState.PEN_IS_IN_RANGE_WITH_ERASING_INTENT,
> PenState.PEN_IS_IN_CONTACT,
> + PenState.PEN_IS_IN_CONTACT_WITH_BUTTON,
> + PenState.PEN_IS_IN_CONTACT_WITH_SECOND_BUTTON,
> PenState.PEN_IS_ERASING,
> )
>
> if self == PenState.PEN_IS_IN_RANGE:
> return (
> PenState.PEN_IS_IN_RANGE,
> + PenState.PEN_IS_IN_RANGE_WITH_BUTTON,
> + PenState.PEN_IS_IN_RANGE_WITH_SECOND_BUTTON,
> PenState.PEN_IS_OUT_OF_RANGE,
> PenState.PEN_IS_IN_CONTACT,
> )
> @@ -112,6 +184,8 @@ class PenState(Enum):
> if self == PenState.PEN_IS_IN_CONTACT:
> return (
> PenState.PEN_IS_IN_CONTACT,
> + PenState.PEN_IS_IN_CONTACT_WITH_BUTTON,
> + PenState.PEN_IS_IN_CONTACT_WITH_SECOND_BUTTON,
> PenState.PEN_IS_IN_RANGE,
> PenState.PEN_IS_OUT_OF_RANGE,
> )
> @@ -130,6 +204,38 @@ class PenState(Enum):
> PenState.PEN_IS_OUT_OF_RANGE,
> )
>
> + if self == PenState.PEN_IS_IN_RANGE_WITH_BUTTON:
> + return (
> + PenState.PEN_IS_IN_RANGE_WITH_BUTTON,
> + PenState.PEN_IS_IN_RANGE,
> + PenState.PEN_IS_OUT_OF_RANGE,
> + PenState.PEN_IS_IN_CONTACT_WITH_BUTTON,
> + )
> +
> + if self == PenState.PEN_IS_IN_CONTACT_WITH_BUTTON:
> + return (
> + PenState.PEN_IS_IN_CONTACT_WITH_BUTTON,
> + PenState.PEN_IS_IN_CONTACT,
> + PenState.PEN_IS_IN_RANGE_WITH_BUTTON,
> + PenState.PEN_IS_OUT_OF_RANGE,
> + )
> +
> + if self == PenState.PEN_IS_IN_RANGE_WITH_SECOND_BUTTON:
> + return (
> + PenState.PEN_IS_IN_RANGE_WITH_SECOND_BUTTON,
> + PenState.PEN_IS_IN_RANGE,
> + PenState.PEN_IS_OUT_OF_RANGE,
> + PenState.PEN_IS_IN_CONTACT_WITH_SECOND_BUTTON,
> + )
> +
> + if self == PenState.PEN_IS_IN_CONTACT_WITH_SECOND_BUTTON:
> + return (
> + PenState.PEN_IS_IN_CONTACT_WITH_SECOND_BUTTON,
> + PenState.PEN_IS_IN_CONTACT,
> + PenState.PEN_IS_IN_RANGE_WITH_SECOND_BUTTON,
> + PenState.PEN_IS_OUT_OF_RANGE,
> + )
> +
> return tuple()
>
> @staticmethod
> @@ -364,26 +470,64 @@ class PenDigitizer(base.UHIDTestDevice):
> pen.xtilt = 0
> pen.ytilt = 0
> pen.twist = 0
> + pen.barrelswitch = False
> + pen.secondarybarrelswitch = False
> elif state == PenState.PEN_IS_IN_RANGE:
> pen.tipswitch = False
> pen.inrange = True
> pen.invert = False
> pen.eraser = False
> + pen.barrelswitch = False
> + pen.secondarybarrelswitch = False
> elif state == PenState.PEN_IS_IN_CONTACT:
> pen.tipswitch = True
> pen.inrange = True
> pen.invert = False
> pen.eraser = False
> + pen.barrelswitch = False
> + pen.secondarybarrelswitch = False
> + elif state == PenState.PEN_IS_IN_RANGE_WITH_BUTTON:
> + pen.tipswitch = False
> + pen.inrange = True
> + pen.invert = False
> + pen.eraser = False
> + pen.barrelswitch = True
> + pen.secondarybarrelswitch = False
> + elif state == PenState.PEN_IS_IN_CONTACT_WITH_BUTTON:
> + pen.tipswitch = True
> + pen.inrange = True
> + pen.invert = False
> + pen.eraser = False
> + pen.barrelswitch = True
> + pen.secondarybarrelswitch = False
> + elif state == PenState.PEN_IS_IN_RANGE_WITH_SECOND_BUTTON:
> + pen.tipswitch = False
> + pen.inrange = True
> + pen.invert = False
> + pen.eraser = False
> + pen.barrelswitch = False
> + pen.secondarybarrelswitch = True
> + elif state == PenState.PEN_IS_IN_CONTACT_WITH_SECOND_BUTTON:
> + pen.tipswitch = True
> + pen.inrange = True
> + pen.invert = False
> + pen.eraser = False
> + pen.barrelswitch = False
> + pen.secondarybarrelswitch = True
> elif state == PenState.PEN_IS_IN_RANGE_WITH_ERASING_INTENT:
> pen.tipswitch = False
> pen.inrange = True
> pen.invert = True
> pen.eraser = False
> + pen.barrelswitch = False
> + pen.secondarybarrelswitch = False
> elif state == PenState.PEN_IS_ERASING:
> pen.tipswitch = False
> pen.inrange = True
> pen.invert = False
> pen.eraser = True
> + pen.barrelswitch = False
> + pen.secondarybarrelswitch = False
>
> pen.current_state = state
>
>
> --
> 2.41.0
>
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