Messages in this thread | | | From | Daniel Palmer <> | Date | Thu, 20 Jan 2022 20:15:40 +0900 | Subject | Re: [RFC] How to add hardware rotation, scaling etc to a DRM/KMS driver |
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Hi Daniel,
On Thu, 20 Jan 2022 at 01:30, Daniel Vetter <daniel@ffwll.ch> wrote: > > I got the feeling that maybe I should just provide an interface to the > > blitter from userspace and userspace should be doing the rotation. I'd > > like to do it in the kernel so stuff like SDL1 apps just work but > > maybe that isn't possible? > > panel orientation property is for that stuff: > fbcon will head this and rotate in sw,
This is working. On boot I get Tux rotated correctly etc.
> as should any competent compositor > in userspace (but some might not, it depends).
That's the problem I guess. I don't have one. SDL1 apps like prboom use the fbdev emulation as-is so they render upside down[0]. I have 16MB of local storage and 128MB of RAM so I don't think I'll manage to get the standard userland bits onto it.
I wanted to do the rotation in the kernel so I didn't have to hack up SDL1.
Cheers,
Daniel
0 - https://twitter.com/linux_chenxing/status/1479801511274491909
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