[U-Boot] [PATCH RESEND 7/9] video: Allow board hook before video init

[Simon Glass]

Hi Maxime,

On 22 November 2016 at 05:41, Maxime Ripard
<maxime.ripard at free-electrons.com> wrote:
> Hi Simon,
>
> On Mon, Nov 14, 2016 at 01:44:45PM -0700, Simon Glass wrote:
>> Hi Maxime,
>>
>> On 14 November 2016 at 13:24, Maxime Ripard
>> <maxime.ripard at free-electrons.com> wrote:
>> > Hi Simon,
>> >
>> > On Fri, Nov 11, 2016 at 09:17:28AM -0700, Simon Glass wrote:
>> >> Hi Maxime,
>> >>
>> >> On 8 November 2016 at 03:19, Maxime Ripard
>> >> <maxime.ripard at free-electrons.com> wrote:
>> >> > Some boards might need to some additional setup right before initialising
>> >> > the video console.
>> >> >
>> >> > Add some hook to allow that.
>> >>
>> >> Instead of this, can you use driver model (UCLASS_VIDEO)?
>> >
>> > I don't really know the device model that well, hence 'm not really
>> > sure how would that help. Can a board register a hook to be called
>> > before a driver is probed?
>>
>> My suggest would be that the driver can do whatever is required. What
>> is the board-specific code actually wanting to do?
>
> We need to adjust the video-mode environment variable that is going to
> be used in the driver's initialisation. We're doing that by
> identifying which daughter board is attached, and then setting that
> value according to the display output we want to use.
>
> So we need some hook that would run between the environment
> initialisation and the video driver's init.

As an example of how you might pass platform data to the video driver,
see board_init() in gurnard.c.

Regards,
Simon