* [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; 4+ 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] 4+ 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
2026-06-27 10:06 ` David Heidelberg
0 siblings, 1 reply; 4+ 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] 4+ messages in thread
* Re: [regression] synaptics-rmi4: Failed to read the Control Register Descriptor: EIO
2026-06-26 21:18 ` Dmitry Torokhov
@ 2026-06-27 10:06 ` David Heidelberg
2026-06-28 5:43 ` Dmitry Torokhov
0 siblings, 1 reply; 4+ messages in thread
From: David Heidelberg @ 2026-06-27 10:06 UTC (permalink / raw)
To: Dmitry Torokhov; +Cc: linux-input, Linux Next Mailing List
On 26/06/2026 23:18, Dmitry Torokhov wrote:
> 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.
That did it for me, now the TS works again.
Thank you
David
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [regression] synaptics-rmi4: Failed to read the Control Register Descriptor: EIO
2026-06-27 10:06 ` David Heidelberg
@ 2026-06-28 5:43 ` Dmitry Torokhov
0 siblings, 0 replies; 4+ messages in thread
From: Dmitry Torokhov @ 2026-06-28 5:43 UTC (permalink / raw)
To: David Heidelberg; +Cc: linux-input, Linux Next Mailing List
On Sat, Jun 27, 2026 at 12:06:29PM +0200, David Heidelberg wrote:
> On 26/06/2026 23:18, Dmitry Torokhov wrote:
> > 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.
>
> That did it for me, now the TS works again.
Thank you for letting me know.
--
Dmitry
^ permalink raw reply [flat|nested] 4+ messages in thread
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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
2026-06-27 10:06 ` David Heidelberg
2026-06-28 5:43 ` Dmitry Torokhov
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