Re: [PATCH] Input: touch screen - cst816x: fix gesture handling

[Oleh Kuzhylnyi]

On Sat, 15 Aug 2026 02:18:21 +0800, Jianing Li wrote:

> The controller reports 0x05 for single click and 0x0b for double
> click, while the binding only defines keycode mappings for the four
> swipe gestures and long press. cst816x_gest_idx() currently maps every
> other nonzero gesture to the long-press slot, so unsupported gesture
> IDs can be reported using the long-press keycode.

Officially, the driver and DT bindings do not configure or support the
Double Click (0x0b) gesture. While the hardware may support it, the driver
does not enable or map it.

We shouldn't handle gestures outside of those documented in the DT
bindings, unless the goal is specifically to ignore noise on the I2C bus.

I re-tested the original driver on physical hardware (Raspberry Pi 4b with a
CST816S display module) with debug logs enabled, and I confirmed that no
gesture codes outside of those defined in the DT bindings are emitted.

Best Regards,
Oleh