Re: [regression] synaptics-rmi4: Failed to read the Control Register Descriptor: EIO

On 26/06/2026 23:18, Dmitry Torokhov wrote:

Hi David,

On Fri, Jun 26, 2026 at 11:09:54PM +0200, David Heidelberg wrote:

quoted

With next-20260626 without any additional patches, the synaptics fails on
OnePlus 6T with:

[   16.620292] rmi4_i2c 12-0020: registering I2C-connected sensor
[   16.857617] rmi4_f01 rmi4-00.fn01: found RMI device, manufacturer:
Synaptics, product: S3706B, fw id: 2852315
[   16.867324] rmi4_f12 rmi4-00.fn12: Failed to read the Control Register
Descriptor: -5
[   16.867338] rmi4_f12 rmi4-00.fn12: probe with driver rmi4_f12 failed with
error -5

Yes, at least a98518e72439 "Input: rmi4 - fix register descriptor address
calculation" is wrong and needs to be reverted.

That did it for me, now the TS works again.

Thank you
David