Hi Josef, I was expecting that kind of answer and I can feel the pain ;-) Thanks for the insight.
Cheers, Alex On 31.01.2017 14:13, Josef Söntgen wrote: > Hello Alexander, > > * Alexander Senier <a...@senier.net> [2017-01-31 12:52:50 +0100]: >> when looking into Genodes driver support, I was wondering about DDE >> BSD. The audio_* ports seems to be its only use case. Is there any >> (technical) justification for not porting audio drivers from Linux >> using DDE Linux? With USB, WiFi and GMA there were much more complex >> driver ported using DDE Linux after all... > > TL;DR personal preference lead to using OpenBSD for the x86 audio > driver. > > Long story (with some ranting included): > > Generally speaking, porting drivers from OpenBSD is much easier than, > for example, from Linux (at least in my experience). We take drivers > from Linux mainly for two reasons: > > 1) We need support for devices that are only supported in Linux > (at the time that was true for iwlwifi MVM devices and for > GMA the DRM subsystem in the Linux driver is the de-facto > upstream branch, all other OS' used this base as well) > 2) We are most experienced in porting drivers from Linux and > did so in the past (that is true in case of the USB driver) > > That being said, porting the audio drivers from OpenBSD was my personal > decision. At the time we wanted to replace the aging OSSv4 based driver > and at first I did so as a pet-project. After my experience with porting > the wifi_drv from Linux, I was (and to some degree still am) fed up with > Linux because it is a complex process to do so. What is more, with every > update of dde_linux it gets more complicated because APIs change in > subtile ways that we did not anticipated during the initial porting > effort or other APIs are used, which leads to increased size of the > Linux emulation environment. All in all the maintaince burden is high > with ported Linux drivers — that is why we update them only if it is > really necessary. This is the main reason I turned to OpenBSD. That and > my dislike for ALSA. > > > Regards > Josef > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ genode-main mailing list genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
