DRM KMS Modesetting

[Jesse Barnes]

On Fri, 18 Nov 2011 22:35:13 +0100
David Herrmann <dh.herrmann at googlemail.com> wrote:

> 2011/11/15 Kristian Høgsberg <krh at bitplanet.net>:
> > 2011/11/15 David Herrmann <dh.herrmann at googlemail.com>:
> >> 2011/11/15 Kristian Høgsberg <krh at bitplanet.net>:
> >>> On Mon, Nov 14, 2011 at 5:54 PM, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> >>>> On Mon, 14 Nov 2011 21:47:09 +0100
> >>>> David Herrmann <dh.herrmann at googlemail.com> wrote:
> >>>>> > I had to modify the resolution the test was searching for
> >>>>> > to 1920x1200 instead of 1024x600 since I tested on a DP attached
> >>>>> > monitor, and fix the connector id, but other than that it seemed to
> >>>>> > work fine.
> >>>>>
> >>>>> Thanks for testing. At least my code seems right now, but I still
> >>>>> cannot get it to work on my machine. The output of modetest is:
> >>>>> https://gist.github.com/1365083
> >>>>>
> >>>>> There is only one connected connector+encoder+mode so I don't know
> >>>>> where the problem exactly is. Are there any debug options? Is it
> >>>>> possible to query the EGLImage for width/height?
> >>>>
> >>>> Ok maybe the gen3 vs gen4 EGL image code isn't calculating the
> >>>> width/stride correctly somewhere then.  You'd have to walk through the
> >>>> gbm_dri2.c and egl_dri2.c code and see where the width is going off
> >>>> into the weeds.
> >>>
> >>> Could be, I know I've run Wayland on Pineview though, so that works at
> >>> least.  David, did you try eglkms from mesa demos?
> >>>
> >>> http://cgit.freedesktop.org/mesa/demos/tree/src/egl/opengl/eglkms.c
> >>
> >> I tried it now. I get a black screen and in the left quarter there is
> >> one white triangle which fades to black. But again, the right 3/4 of
> >> the screen are black.
> >>
> >>> Kristian
> >>>
> >>
> >> I will try to debug my mesa package but this will probably take some
> >> time. If someone has an idea how to find the bug faster, just tell me
> >> ;)
> >
> > It's all very odd.  The gbm allocation ends up in intel_create_image
> > in src/mesa/drivers/dri/intel/intel_screen.c, so you can try to
> > compare the stride, width and height there with what modetest uses.
> 
> I just recompiled with newest git revision and I cannot reproduce the
> bug anymore. I cannot tell what fixed it as I recompiled with other
> configure options. Previously I used --disable-glx-tls and
> --enable-gallium-drivers=i915. Now I use --enable-glx-tls and no i915
> in gallium but only --with-dri-drivers=i915.
> My laptop takes about 30min to compile mesa so I haven't tracked it down, yet.

Ah it's probably gallium vs classic then.  We don't support the gallium
driver at all, so I'm not sure what state it's in.

-- 
Jesse Barnes, Intel Open Source Technology Center
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