Enable KPP on i.MX7D

[#1]

HW: i.MX7 SabreSD

SW: Android N7.1.1_1.0.0

There is KPP module on i.MX7, but NXP reference board didn't have it. We reworked a "keypad" and has the demo.

Signal:

For testing, launch an app in Android that can accept text input. KPP also supports multiple input, the "A" is showed by pressing "shift" + "a".

As a side note,

1. The input device driver is drivers/input/keyboard/imx_keypad.c

2. The input event driver is drivers/tty/vt/keyboard.c

Original Attachment has been moved to: 0001-Enable-KPP-on-i.MX7.patch.zip

[ko-hey]

Hi JayTu‌

Did you test the pressing "shift" + " f " and "shift" + " g " ?

If yes, could you show me it in image like above ?

Ko-hey

[JayTu]

Let me find some time to check it again next week. Multiple key is having issues on your board?

[ko-hey]

Hi JayTu

Sorry for late reply.

Did you have time to check it ?

Not on our board, it's on my customer board.

Ko-hey

[JayTu]

Hi ko-hey‌,

The test result is shown as below, multiple key can be detected if it's not on the same row.

[ko-hey]

Hi JayTu

Thank you for testing.

Unfortunately, my customer need multiple key detect on the same row.

The conclusion is i.MX7 can't detect multiple key on the same row.

Am I correct ?

Ko-hey

[JayTu]

I think it is a bug but not limitation. You can submit another ticket for it.

[PauloK_]

Dear Ko-hey,

By any chance, have you submitted a new ticket about this issue?

Please advise.

Thanks and regards!

[ko-hey]

Hi Paulo Knirsch

Sorry for late reply.

I posted Case:00139023.

Could you follow it ?

What I want to know is whether the workaround need additional hardware or not.

Ko-hey

[JayTu]

Attach the patch for fixing multiple key detection on the same row, 0001-Keypad-support-key-detection-at-the-same-row-on-i.MX.patch

[ko-hey]

Hi JayTu‌

Thank you for providing the patch.

I want to test the patch but unfortunately, I don't have any environment for test.

So could you test the pressing "shift" + " f " and "shift" + " g " again ?

If yes, could you show me it in image like above ?

Ko-hey

[JayTu]

Hi ko-hey‌,

I've tested all the keys, it works correctly.

[ko-hey]

Hi JayTu‌

Thank you for quick response.

Could you show me the image like above ?

Also I have additional question.

The workaround in the thread is without any additional hardware.

Am I correct ?

I need info that whether user need an additional hardware for detecting multiple keys in the same row or not.

Is it still discussing ?

Ko-hey

[JayTu]

Hi ko-hey‌,

There's no need for additional HW rework.

[ko-hey]

Hi JayTu‌

Could you show me the image like above ?

I can't test in my environment so I need proof.

Ko-hey

[ko-hey]

Hi JayTu‌

Could you follow this thread again ?

Ko-hey

[ko-hey]

Hi JayTu‌

Could you follow this thread again ?

Ko-hey