Hi,
On Mon, Aug 18, 2025 at 4:50 AM Pin-yen Lin <treapking@xxxxxxxxxxxx> wrote:
>
> Introduce a new HID quirk to indicate that this device has to be enabled
> after the panel's backlight is enabled, and update the driver data for
> the elan devices to enable this quirk. This cannot be a I2C HID quirk
> because the kernel needs to acknowledge this before powering up the
> device and read the VID/PID. When this quirk is enabled, register
> .panel_enabled()/.panel_disabling() instead for the panel follower.
>
> Also rename the *panel_prepare* functions into *panel_follower* because
> they could be called in other situations now.
>
> Fixes: bd3cba00dcc63 ("HID: i2c-hid: elan: Add support for Elan eKTH6915 i2c-hid touchscreens")
> Fixes: d06651bebf99e ("HID: i2c-hid: elan: Add elan-ekth6a12nay timing")
>
> Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> Signed-off-by: Pin-yen Lin <treapking@xxxxxxxxxxxx>
>
> ---
>
> Changes in v3:
> - Collect review tag
> - Add fixes tags
>
> Changes in v2:
> - Rename *panel_prepare* functions to *panel_follower*
> - Replace after_panel_enabled flag with enabled/disabling callbacks
>
> drivers/hid/i2c-hid/i2c-hid-core.c | 46 ++++++++++++++++-----------
> drivers/hid/i2c-hid/i2c-hid-of-elan.c | 11 ++++++-
> include/linux/hid.h | 2 ++
> 3 files changed, 40 insertions(+), 19 deletions(-)
Re-iterating my response from v2 [1] so it's still seen even if people
only look at the latest version. :-) If HID folks don't mind us
landing this through drm-misc, feel free to Ack this patch. If HID
folks would rather not land through drm-misc, the default plan would
be to just wait until patch #1 makes its way to mainline before
landing patch #2.
Thanks!
[1] https://lore.kernel.org/r/CAD=FV=UV8_XGmxC=7Z18PEnj6wKz+yZQuV_4h+LJh_MNCqszvg@xxxxxxxxxxxxxx/
