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SubjectRe: [Regression]: Commit 74d905d2 breaks the touchpad and touchscreen of Google Chromebook "samus"
On Wed, Nov 4, 2020 at 9:18 AM Andre <andre.muller@web.de> wrote:

> commit 74d905d2: Input: atmel_mxt_ts - only read messages in
> mxt_acquire_irq() when necessary
>
> breaks the touchpad and touchscreen of the 2015 Chromebook Pixel "Samus".

This commit also breaks the touchscreen on the Samsung GT-I9070
mobile phone. All interrupts stop appearing. If I revert the patch
I get interrupts.

dmesg after this commit:

$ dmesg |grep mxt
[ 1.967816] atmel_mxt_ts 3-004a: Family: 129 Variant: 1 Firmware
V1.0.AA Objects: 18
[ 1.975815] atmel_mxt_ts 3-004a: Enabling RETRIGEN workaround
[ 1.982398] atmel_mxt_ts 3-004a: Direct firmware load for
maxtouch.cfg failed with error -2
[ 1.992252] atmel_mxt_ts 3-004a: Touchscreen size X479Y799

dmesg with commit reverted:
$ dmesg |grep mxt
[ 1.967831] atmel_mxt_ts 3-004a: Family: 129 Variant: 1 Firmware
V1.0.AA Objects: 18
[ 1.984195] atmel_mxt_ts 3-004a: Direct firmware load for
maxtouch.cfg failed with error -2
[ 2.007399] atmel_mxt_ts 3-004a: Touchscreen size X479Y799

And I get interrupts.

Tell me if I need to test some more approaches.

Yours,
Linus Walleij

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