[U-Boot] [PATCH v2 0/19] tegra: Add display driver and LCD support for Seaboard

Stephen Warren
2012-06-13T23:03:07Z

On 06/13/2012 04:57 PM, Stephen Warren wrote:
> On 06/13/2012 10:19 AM, Simon Glass wrote:
>> This series adds support for the Tegra2x's display peripheral. This
>> supports the LCD display on Seaboard and we use this to enable console
>> output in U-Boot on the LCD.
>
> Simon,
>
> This series doesn't apply to u-boot-tegra/master cleanly; there are a
> couple trivial conflicts in arch/arm/cpu/armv7/tegra2/Makefile to
> resolve, but I had to apply the final patch completely by hand.
>
> When I run the resultant binary, I see the LCD backlight turn on, but
> the image on the LCD is wrong; it starts completely black without any
> text showing, then slowly fills in to white/gray with many horizontal
> and vertical black lines; I guess the LCD timing is incorrect - are
> there multiple different LCD models? Note that I am using a real
> Seaboard not a Springbank for this test.

Oh, false alarm on this second point - the LCD is screwed up after using
nvflash to flash the device, but when power-cycling it rather than just
resetting it, the LCD works fine. I guess this means the driver is not
initializing something that nvflash changed, and relying on a power-on
default. I suppose it might not be worth fixing that given it works from
cold power on.