[U-Boot] dm video question

[Simon Glass]

Hi Peng,

On 18 August 2016 at 00:19, Peng Fan <van.freenix at gmail.com> wrote:
> Hi Simon,
>
> On Tue, Aug 16, 2016 at 10:16:00PM -0600, Simon Glass wrote:
>>Hi Peng,
>>
>>On 15 August 2016 at 04:05, Peng Fan <van.freenix at gmail.com> wrote:
>>>
>>> Hi Simon,
>>>
>>> I am trying to coverting mxsfb.c to support dm.
>>>
>>> But met the following issue.
>>> "
>>> mxsfb_lcd_bind: Frame buffer size 200400
>>> Video device 'lcdif at 021c8000' cannot allocate frame buffer memory -ensure the device is set up before relocation
>>> "
>>>
>>> I add "u-boot, dm-pre-reloc" in dts as the following, but no help.
>>>
>>
>>Can you check that you have that property in each node leading to the
>>root also? You can use fdtdump to display the tree.
>
> I did not know that I need to add u-boot,dm-pre-reloc for the nodes
> in the path of root -> lcdif.
>
> Now I works. Thanks.

Great! If you have time you could create a little
doc/driver-model/video-howto.txt with this information.

>
> Still have a question.
> When enabled DM_VIDEO, do you know how to let the screen show a logo, just like
> what cfb_console supports?

That is not implemented yet. But if you can move over the code and
tidy it, it would be a great feature to have.

[..]

Regards,
Simon