drm_hwcomposer moving to fd.o

[Daniel Vetter]

On Mon, Sep 25, 2017 at 09:06:55AM +0200, Tomeu Vizoso wrote:
> On 09/25/2017 04:44 AM, Chih-Wei Huang wrote:
> > Hey Robert, thank you for the reply.
> > 
> > 2017-09-22 23:43 GMT+08:00 Robert Foss <robert.foss at collabora.com>:
> >> Hey Chih-Wei,
> >> On Fri, 2017-09-22 at 10:40 +0800, Chih-Wei Huang wrote:
> > 
> >> The android-ia project has supported using drm_hwcomposer and an
> >> alternative hwcomposer, so it would think there should be no issues.
> > 
> > By x86 GPUs, I meant i915(i965)/nouveau/radeon/amdgpu/virgl/vmwgfx.
> > Among these only virgl works with the current drm_hwcomposer.
> > All the others don't have a ready atomic mode-setting API to use it.
> > That's the problem which should be addressed I meant.
> 
> Most if not all of those drivers support the atomic updates API in
> mainline (and have for a few releases by now).

amdgpu does not (but will once DC has landed, at least when you enable
DC). Radeon doesn't, and likely never will. Nouveau is atomic only for
nv50+.

Cheers, Daniel

> Regards,
> 
> Tomeu
> 
> > The android-ia doesn't support using fdo's drm_hwcomposer I think.
> > They use an alternative hwcomposer [1] as you said.
> > It looks very different than drm_hwcomposer though
> > both rely on the similar (or same?) atomic API.
> > Android-ia's kernel has also been patched to work with it.
> > The vanilla kernel (at least LTS 4.9) can't work with [1]
> > or drm_hwcomposer.
> > Actually [1] only works with i915(i965) but we want
> > a more generic hwcomposer like drm_hwcomposer.
> > 
> > Please correct me if I am wrong.
> > 
> > 
> > [1]: git://github.com/01org/IA-Hardware-Composer
> > 
> >>> How about the gralloc?
> >>> There are also several implementations
> >>> scattered somewhere.
> >>> I think it's also important to standardize it to fd.o
> >>> and make it work with fd.o's drm_hwcomposer.
> >>
> >> Gralloc is a different story, and the right person to ask about it is
> >> not me, but maybe Rob Herring.
> > 
> > 
> > 
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch