Re: [PATCH v2] Input: s6sy761 - fix resume ordering and restore sensing

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

On Sat, Sep 26, 2026 at 10:26:47PM +0200, David Heidelberg via B4 Relay wrote:
> From: David Heidelberg <david@ixit.cz>
> 
> System suspend powers the controller off and resume powers it back on,
> but the resume path enables the interrupt before s6sy761_power_on()
> checks the boot. The firmware raises its boot-complete event on the
> interrupt line, the threaded handler consumes it, s6sy761_power_on()
> then reads an empty event and resume fails with -ENODEV, skipping the
> touch function setup:
> 
> s6sy761 2-0048: PM: dpm_run_callback(): s6sy761_resume [s6sy761] returns -19
> 
> Power the chip on first and only then unmask the interrupt. Once resume
> completes the boot handshake the chip comes back with sensing off, as
> at probe where input_open() turns it on, so the touchscreen stays dead
> after resume. Send SENSE_ON again when the input device is open.
> 
> Tested on a Pixel 3 XL over several s2idle cycles: resume succeeds and
> the touch function and sense status match the pre-suspend state.
> 
> Assisted-by: LLM
> Cc: stable@vger.kernel.org
> Fixes: 0145a7141e59 ("Input: add support for the Samsung S6SY761 touchscreen")
> Signed-off-by: David Heidelberg <david@ixit.cz>

Applied, thank you.

-- 
Dmitry