Re: [PATCH 0/5] OMAP: RX51: Add LCD Panel Support for N900

[arno@natisbad.org (Arnaud Ebalard)]

Hi,

>> Roger Quadros <roger.quadros@nokia.com> writes:
>>
>>> These patches get the N900 LCD panel working.
>>> Apply's cleanly on 2.6.34-rc2
>>>
>>> Pre-requisites:
>>> https://patchwork.kernel.org/patch/86318/
>>> https://patchwork.kernel.org/patch/86319/
>>> https://patchwork.kernel.org/patch/86320/
>>
>> First, thanks for pushing the missing bits for N900 hardware support
>> upstream! I wanted to give your patches a try and test a l-o kernel on
>> my N900 (I know I won't have full hardware support ... at the moment).
>>
>> Using current l-o tree with your 5 panel patches and the 3 you link on
>> patchwork, I initially ended up with a kernel panic in
>> omap3_onenand_write_bufferram() (i.e. unrelated to your patches).
>>
>> With http://patchwork.ozlabs.org/patch/48337/ (mtd: OneNAND: OMAP3:
>> unmap correct DMA buffer), I am able to get the official Nokia
>> /sbin/preinit called: then, getbootstate reports a malfunction but
>> AFAICT, the panel is working ok.
>>
> The getbootstate malfunction is expected as there is no support for it
> yet in mainline. But you should get to shell without that.
>
> You could hack the startup script to spawn a getty on ttyS2. This
> should get you to shell.
>
> so in /sbin/preinit, in start_shell()
>
> -/sbin/getty 115200 ttyS0 -n -l /bin/sh
> +/sbin/getty 115200 ttyS2 -n -l /bin/sh

For the records, just in case someone wants to do the same, I had to
use: 

   /sbin/getty 115200 tty0 -n -l /bin/sh

I also had to set CONFIG_KEYBOARD_TWL4030 to get the keyboard
working. Any reason for that option not be enabled by default in
rx51_defconfig?

Additionally, after something like 25 seconds, the screen goes black and
the device stops. Any clue? Can be panel realted?

Cheers,

a+