On Sat, Sep 17, 2011 at 11:11 AM, Florian Tobias Schandinat <FlorianSchandinat@xxxxxx> wrote: > On 09/17/2011 03:16 PM, Rob Clark wrote: >>>From userspace perspective, fbdev doesn't go away. It is just a >> legacy interface provided on top of DRM/KMS driver mostly via helper >> functions. With this approach, you get the richer KMS API (and all >> the related plumbing for hotplug, EDID parsing, multi-head support, >> flipping, etc) for userspace stuff that needs that, but can keep the >> fbdev userspace interface for legacy apps. It is the best of both >> worlds. There isn't really any good reason to propagate standalone >> fbdev driver anymore. > > I disagree. This depends on the functionality the hardware has, the desired > userspace and the manpower one has to do it. And of course if you just want fb > having fb via DRM/KMS has some overhead/bloat. It's perfectly okay to have just > an fb driver for devices that can't do more anyway. > And fb is no legacy interface but actively developed, just with other goals than > DRM/KMS is, it aims for stability and to provide a direct interface, not needing > any X or wayland crap. Hmm, for simple enough devices, maybe fb is fine.. but if you are covering a range of devices which include stuff with more sophisticated userspace (X/wayland), then just doing DRM/KMS and using the DRM fbdev helpers, vs doing both DRM/KMS and standalone fbdev.. well that seems like a no-brainer. I still think, if you are starting a new driver, you should just go ahead and use DRM/KMS.. a simple DRM/KMS driver that doesn't support all the features is not so complex, and going this route future-proofs you better when future generations of hardware gain more capabilities and sw gain more requirements. BR, -R > > Best regards, > > Florian Tobias Schandinat > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
