On Thu, Jan 20, 2022 at 12:12 PM Daniel Palmer <daniel@xxxxxxxx> wrote: > > Hi Daniel, > > On Thu, 20 Jan 2022 at 01:30, Daniel Vetter <daniel@xxxxxxxx> 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. Move to drm kms, fix userspace. fbdev never supported this, and I really don't think it's a good idea to add in-kernel rotation to fbdev. -Daniel > > Cheers, > > Daniel > > 0 - https://twitter.com/linux_chenxing/status/1479801511274491909 -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
