Emma Anholt

With current drm-next, some displays may be better behaved about overscan.

Even if we can't generally do varargs, it could be useful to get some documentation of how to handle some common libc functions like this -- I found I had...

In `drivers/gpu/drm/vc4/vc4_kms.c` you'll find `max_width`/`max_height` settings. You can try bumping those up to 4095 -- I see enough bits in `SCALER_DISPCTRLX_WIDTH`/`HEIGHT` and `SCALER_POS1_SCL_WIDTH` for that. >1920 widths may take adjusting...

vc4 has a 3D rendering texture size limit of 2048. You'll start getting OpenGL errors if you try to exceed that (as X11 might do if we're missing checks)

If you're using X11, rendering your windows will involve texturing for various operations, so it is a limit on screen size.

I'd love to review someone's (tested) patches for >2k display on vc4, regardless of whether you can do GL with it. I probably won't have time to work on that,...

Do you have `ignore_lcd=1` in `/boot/config.txt`? If not, the firmware might steal interrupts before linux gets them.

fkms is a disgusting awful hack in the downstream tree. Does kms have the same issues? (probably, I'm just not going to even pretend to support fkms if it's an...

This will probably be supported in DRM prime mode with Noralf's tinydrm work.

Thanks for looking into this! Here's my output, without tinydrm: # xrandr --listproviders Providers: number : 1 Provider 0: id: 0x43 cap: 0xf, Source Output, Sink Output, Source Offload, Sink...