i.MX ProcessorsのトピックRe: edt-ft5x06 driver issue

edt-ft5x06 driver issue

nigelevans — Fri, 25 Nov 2016 14:26:26 GMT

Hi,

I am trying to get edt-ft56x06 driver working with imx6sl.

I have added the driver in the Kernel and added dts entry. I have scoped the I2c, Reset and IRQ lines and all seems ok.

However, when I boot the system and touch the screen I get the following:

edt_ft5x06_ts_isr: 5 callbacks suppressed
edt_ft5x06 1-0038: Unexpected header: 000000!
edt_ft5x06 1-0038: Unexpected header: 000000!
edt_ft5x06 1-0038: Unexpected header: 000000!
edt_ft5x06 1-0038: Unexpected header: 000000!
edt_ft5x06 1-0038: Unexpected header: 000000!
edt_ft5x06 1-0038: Unexpected header: 000000!
edt_ft5x06 1-0038: Unexpected header: 000000!
edt_ft5x06 1-0038: Unexpected header: 000000!
edt_ft5x06 1-0038: Unexpected header: 000000!
edt_ft5x06 1-0038: Unexpected header: 000000!

Can anybody explain what could be wrong here?

Thanks.

Re: edt-ft5x06 driver issue

fabio_estevam — Fri, 25 Nov 2016 15:47:49 GMT

Maybe you could compare your dts against this one:

kernel/git/torvalds/linux.git - Linux kernel source tree

Regards,

Fabio Estevam

Re: edt-ft5x06 driver issue

igorpadykov — Sun, 27 Nov 2016 23:38:06 GMT

Hi nigel

one can check Documentation/bindings/devicetree/input/touchscreen/edt-ft5x06.txt

and debug edt_ft5x06 driver

linux-2.6-imx.git - Freescale i.MX Linux Tree

log shows all data as nulls, one can try to check data with oscilloscope

Best regards
igor

Re: edt-ft5x06 driver issue

nigelevans — Mon, 28 Nov 2016 20:58:44 GMT

Thanks for the answers,

I managed to fix by pulling in a version of the driver from a newer kernel.

Now, I have touch screen fully probed. But for some reason, in Android, it seems that only top half of the touch panel reacts properly.

I have added simple touchscreen .idc file for the panel which got rid of the 'acting like a mouse with cursor' symptoms.

It seems when I run 'adb shell getevent -lt /dev/input/event0'

The touches in top left and bottom right are correct values for the resolution of the screen. (240x320)

What could be causing this?

Thanks,