[Buildroot] [PATCH 2/2] package/mesa3d: get glxgears working for v3d/vc4 minimal builds

[Howard Mitchell]

Hello Peter,

On 06/03/2020 14:38, Peter Seiderer wrote:
> Hello Howard,
>
> On Fri,  6 Mar 2020 09:25:04 +0000, Howard Mitchell <hm at hmbedded.co.uk> wrote:
>
>> Currently a minimal build for rpi2/3/4 (i.e. only v3d and/or vc4
>> selected, no dri drivers selected) results in working X11 except that
>> glxgears shows a blank window. This commit effectively results in the
>> following conf options being added: -Dglx-direct=true -Ddri3=true
>>
>> Signed-off-by: Howard Mitchell <hm at hmbedded.co.uk>
>> ---
>>   package/mesa3d/Config.in | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/package/mesa3d/Config.in b/package/mesa3d/Config.in
>> index 3950170533..59b8f60773 100644
>> --- a/package/mesa3d/Config.in
>> +++ b/package/mesa3d/Config.in
>> @@ -274,6 +274,7 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_VC4
>>   	select BR2_PACKAGE_MESA3D_GALLIUM_KMSRO
>>   	select BR2_PACKAGE_LIBDRM_VC4
>>   	select BR2_PACKAGE_MESA3D_OPENGL_EGL
>> +	select BR2_PACKAGE_MESA3D_DRI_DRIVER
> On rpi4 v3d/vc4 work definitely for the Qt/eglfs case without
> MESA3D_DRI_DRIVER, so this should at minimum depend on X11 (or
> only be selected by x11/glxgears)?

In fact the '-Ddri3=true' option is already dependent on X11 (in mesa3d.mk)
so only '-Dglx-direct=true' would be left without X. Do you think that is
likelyto break Qt/eglfs?

Regards,
Howard