* [regression] synaptics-rmi4: Failed to read the Control Register Descriptor: EIO
@ 2026-06-26 21:09 David Heidelberg
2026-06-26 21:18 ` Dmitry Torokhov
0 siblings, 1 reply; 2+ messages in thread
From: David Heidelberg @ 2026-06-26 21:09 UTC (permalink / raw)
To: linux-input, Dmitry Torokhov; +Cc: Linux Next Mailing List
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
```
I assume it's due to refactoring. My best guess it's signed/unsigned 32/64bit
type changes, but since I haven't figured it out within reasonable timeframe.
David
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [regression] synaptics-rmi4: Failed to read the Control Register Descriptor: EIO
2026-06-26 21:09 [regression] synaptics-rmi4: Failed to read the Control Register Descriptor: EIO David Heidelberg
@ 2026-06-26 21:18 ` Dmitry Torokhov
0 siblings, 0 replies; 2+ messages in thread
From: Dmitry Torokhov @ 2026-06-26 21:18 UTC (permalink / raw)
To: David Heidelberg; +Cc: linux-input, Linux Next Mailing List
Hi David,
On Fri, Jun 26, 2026 at 11:09:54PM +0200, David Heidelberg wrote:
> 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.
Thanks.
--
Dmitry
^ permalink raw reply [flat|nested] 2+ messages in thread
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