[PATCH] drm: mxsfb: check framebuffer pitch

[Daniel Abrecht]

Am 2020-09-07 16:03, schrieb Stefan Agner:
> The lcdif IP does not support a framebuffer pitch (stride) other than
> the CRTC width.

This may be true for some SOCs, but not for all of them. I used to have
this working flawlessly on the imx8mq like so:
http://projects.dpa.li/git/?p=linux.git;a=commitdiff;h=5a7baa8ba7f1f30139cfcd0f9e13b3773f3605ff

That in turn was based on some patches which weren't fully upstreamed
yet at the time, and was inspired by another patch I had seen here:
https://lore.kernel.org/linux-arm-kernel/20190722174853.GA31795@bogus/t/#m7ac218480eb1d827ff65f82f2e03a5a84c94a5e0

I had almost forgotten about this already, since I currently don't
need it anymore, and I was waiting for the patches it was based on
to get taken up. But if anyone else needs this, feel free to do
whatever you want with it.
I could also take another look at this and submit some patches if this
is preferred, but I'm quiet busy right now, so that could take a while.

In the meantime and for other SOCs, I think checking for an unsupported
pitch is still needed regardless. I'm not against this patch, this is
just a note to make sure it's known that and how this can be done on
the imx8mq.

Regards,
Daniel Abrecht