Hi Javier, On Fri, Jun 9, 2023 at 11:59 AM Javier Martinez Canillas <javierm@xxxxxxxxxx> wrote: > Thomas Zimmermann <tzimmermann@xxxxxxx> writes: > >>> I'd also question the argument that there's even fbdev userspace out > >>> there. It was never popular in it's heyday and definitely hasn't > >>> improved since then. Even the 3 people who still ask for fbdev support > >> > >> There's X.org, DirectFB, SDL, ... > > > > None of these examples has a dependency on fbdev. They can freely switch > > backends and have moved to DRM. Anything program utilizing these > > examples has no dependency on fbdev either. > > > > When I say "userspace" in this context, it's the one old program that > > supports nothing but fbdev. TBH I'm having problems to come up with > > examples. > > > > I personally have two real world examples that can give to you :) > > 1) I've a IoT device at home that has a bunch of sensors (temperatury, > humidity, etc) and a SSD1306 display panel to report that. It just > has small fbdev program to print that info. I could probably port > to KMS but didn't feel like it. Found a fbdev program that I could > modify and got the job done. > > 2) I built a portable retro console for my kids, that uses a ST7735R > LCD panel. The software I use is https://www.retroarch.com/ which > uses fbdev by default (I believe that supports a KMS mode but out > of the box it works with fbdev and that's better tested by them. > > So even when I'm not interested and don't want to enable any of the > fbdev drivers, I want to use the ssd130x and st7735r DRM drivers and > the DRM fbdev emulation layer. > > In other words, there's real use cases for supporting fbdev programs > with DRM drivers. Now, I agree with this patch-set and probably will > disable the user-space fbdev interface in Fedora, but on my embedded > projects I will probably keep it enabled. > > That's why I think that we should support the following combinations: > > * fbdev drivers + DRM fbdev emulation + fbdev user-space "fbdev drivers + fbdev user-space", I assume? > * only DRM drivers without fbdev emulation nor fbdev user-space (your series) Thomas' series includes fbdev emulation here, for the text console. > * only DRM fbdev emulation + fbdev user-space enabled (FB_CORE) Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
