connect i2c-hid touchscreen device and how to bring up?

[Scott Liu]

 I have an i2c-hid touchscreen device and works well on win10 OS.

and now I want to install chromium OS with board=x86-generic and trying to bring it up by i2c-hid driver.

Does it need preparation, like: i2c address, hid descriptor address, ACPI ID "PNP0C50" ?

thanks for help!

[Dmitry Torokhov]

Hi Scott,

If you are trying to install chromium OS on a device that originally
shipped with Win10, I'd expect the touchscreen already be described in
its ACPI tables, and i2c-hid should be able to locate the device (by
PNP0C50 CID) and get HID descriptor address from ACPI data.

If you are connecting a new touchscreen to some x86 device then you
will need to instantiate a new i2c_client device and attach instance
of struct i2c_hid_platform_data to it.

Hope this helps,
Dmitry

[Scott Liu]

Hi Dmitry,

I appreciate your explanation.

After I built an image and run on x86 platform, however I encountered two problems:

1. keyboard is lost functionality and work around is by external USB keyboard.

2. Chromium os didn't recognize Elan's i2c device -> cat /sys/bus/i2c/devices/ and not seeing any elan i2c device.

    Does it mean there are some hardware/driver compatible issue?

    How can I confirm this compatible issue and overcome it if possible, thanks!!

BR,

Scott

[Dmitry Torokhov]

Hi Scott,

On Tue, May 9, 2017 at 9:31 PM, Scott Liu <scot...@emc.com.tw> wrote:
>
> Hi Dmitry,
> I appreciate your explanation.
> After I built an image and run on x86 platform, however I encountered two
> problems:
> 1. keyboard is lost functionality and work around is by external USB
> keyboard.

When you are saying that you lost keyboard functionality, are you
comparing to Windows or a generic Linux distro to Chrome OS?

> 2. Chromium os didn't recognize Elan's i2c device -> cat
> /sys/bus/i2c/devices/ and not seeing any elan i2c device.
> Does it mean there are some hardware/driver compatible issue?
> How can I confirm this compatible issue and overcome it if possible,
> thanks!!

Given that you are not providing any details whatsoever (no kernel
logs, no hardware description) it is impossible to say why some
devices do not work.

Thanks,
Dmitry

[Scott Liu]

Hi Dmitry,

On Thursday, May 11, 2017 at 6:01:50 AM UTC+8, Dmitry Torokhov wrote:

When you are saying that you lost keyboard functionality, are you
comparing to Windows or a generic Linux distro to Chrome OS?

        The keyboard issue is that it works when chromium is on the login screen, I can input email address.

        After I choose "browse as guest" and keyboard is no longer functionality.

        And I run "evtest" program and I can see my input event comes up.
        But it may be chromium X window problem....I guess.

Given that you are not providing any details whatsoever (no kernel
logs, no hardware description) it is impossible to say why some
devices do not work.

OK, I will send log for debug.

thanks,

Scott

 

[Scott]

Hi Dmitry,

從我的 iPad 傳送

Scott Liu <scot...@emc.com.tw> 於 2017年5月11日 下午6:28 寫道：

Hi Dmitry,

On Thursday, May 11, 2017 at 6:01:50 AM UTC+8, Dmitry Torokhov wrote:

When you are saying that you lost keyboard functionality, are you
comparing to Windows or a generic Linux distro to Chrome OS?

        The keyboard issue is that it works when chromium is on the login screen, I can input email address.

        After I choose "browse as guest" and keyboard is no longer functionality.

        And I run "evtest" program and I can see my input event comes up.
        But it may be chromium X window problem....I guess.

After I rebuild the R60 image, this issue is gone. Thanks!

BR,

Scott