[U-Boot] usbkbd input double echoed

[Nikita Kiryanov]

Hi Hans,

On 11/23/2014 05:18 PM, Hans de Goede wrote:
> Hi,
>
> On 11/23/2014 04:07 PM, Nikita Kiryanov wrote:
>> Hi all,
>>
>> I've enabled USB keyboard for cm_fx6 using these three defines:
>>
>> #define CONFIG_USB_KEYBOARD
>> #define CONFIG_SYS_USB_EVENT_POLL
>> #define CONFIG_SYS_STDIO_DEREGISTER
>>
>> I am able to probe it with `usb start`, and set it as input using
>> `setenv stdin usbkbd`.
>>
>> It works, save for one problem: all key presses are echoed twice.
>> The double echo happens both on serial and vga stdout.
>> It is not dependant on the keyboard (tried different ones).
>> Output from commands looks normal.
>> Switching to CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP did not help.
>> Shell still understands each key press as one key press, so
>> even though "pprriinntteennvv" is displayed, the shell still sees
>> "printenv".
>>
>> Any idea what the cause may be?
>
> In my experience both polling methods are sub-optimal, if your board
> has an ehci controller, try using CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
>
> Also I use CONFIG_CONSOLE_MUX, then you can do:
>
> setenv stdin serial,usbkbd
>
> And get both, using this usb-kbd support works fine for me, without the
> double echo, both on the serial console and on the sunxi-cfb console over
> hdmi.
>
> Regards,
>
> Hans
>

I think I must have encountered some toolchain bug. After switching to
another branch to work on something else I came back to my dev branch
and the compiled images no longer have this bug.

Thanks for the help though..

-- 
Regards,
Nikita Kiryanov