DRM KMS Modesetting

[David Herrmann]

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.

> Kristiain
>

Regards
David