Hi, Daniel Thanks for your response! Talking about v4l's virtual gpu driver? Could you please tell some more informations. is this driver in git.linuxtv.org/cgit.cgi/media_tree.git I want to take a look this driver. but I can't find it in their git repository. Or is there any introduction post related this driver? Thanks.
Best wishes Derek On Mon, Aug 25, 2014 at 6:12 AM, Daniel Vetter <daniel at ffwll.ch> wrote: > On Mon, Aug 18, 2014 at 03:35:16PM -0700, Derek wrote: > > Hi every one > > I'm currently working on VirtualMonitor in my leisure time. It allows you > > to use compute/tablet/smartphone as a second monitor for your primary > > computer. please refer to http://virtualmonitor.github.io for more > > information. Currently I have released very basic version for > > windows2000-windows7 to demonstrate the project is feasible. When I was > > trying to make a further step on windows, I realized it is difficult for > an > > individual, as it is not open source and also without technical support > > from Microsoft. > > > > Then I want to move to linux, and I found Ilija Hadzic's post about > Virtual > > CRTCs. his post is here: > > > http://lists.freedesktop.org/archives/dri-devel/2011-November/015975.html > > In his implementation, GPU driver can create arbitrary number of CRTCs > > (configurable by user) instead of only those CRTCs that represent real > > hardware. > > It is very useful not only for VirtualMonitor, but also > > VNC/Virtualization/USB display etc. based on this implementation those > > application will be able to take full advantage of the physical graphic > > card(3D acceleration). > > > > I want raise Ilijia's original question agian, if anybody in this > community > > think Virtual CRTCs is useful, and willing to work together to make a > > further progress. > > My thought is if can implement a driver independent layer between dri and > > vendor specific GPU driver, with some general API. maybe implement this > > based one vendor related GPU first? e.g. based on Ilijia's implementation > > for Radeon as a daemon? > > > > GPU driver is not my expertise, If some expert from this community think > > this feature is interesting, and willing to initiate a project for this > > feature, that will be great. Then people can work and discuss together. > > > > Any comments regarding to Virtual CRTC or VirtualMonitor are very > welcome. > > Thanks. > > I think the concept is overall sound (haven't looked at the old patches in > detail).For the actual implementation I think a separate virtual drm > driver is now > the better approach, since with dma-buf and soon native fence support we > can do this now properly. > > And especially now that we have multi-gpu support in X it should integrate > almost seamlessly into X (and other display managers with multi-gpu > support). Instead of requering special support in all drivers. > > Another thing for which iirc no one ever proposed a decent solution is > synchronization to consumers of the frontbuffers for virtual gpus. So I > guess the driver-private ioctl interface to make that magic work will be > key. > > A (configurable) virtual gpu should also be really useful for automated > testing, e.g. of hot-plug and unplug (both drm core and userspace). The > v4l folks have such a driver (recently massively revamped for 3.18) and it > looks extremely useful. > > For the configuration interface I guess a few simple module options to get > started should be enough, eventually we can switch to configfs (or > similar) to be able to configure and create/destroy virtual gpus at > runtime. > > Just my random thoughts, probably good to kickstart the discussion with > some quick patches and chat with people on #dri-devel on freenode irc. > > Cheers, Daniel > -- > Daniel Vetter > Software Engineer, Intel Corporation > +41 (0) 79 365 57 48 - http://blog.ffwll.ch > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20140825/7fba0a62/attachment-0001.html>
