[PATCH 0/5] virgl: add SDL support and enable by default

[Alexander Kanavin <alex.kanavin@gmail.com>]

This patchset adds two enhancements to qemu virgl support (which is
a virtualized accelerated 3D graphics support for the qemu guests):

1. SDL qemu frontend now comes with virgl fully enabled and working
(over ssh X11 forwarding as well!), so using the gtk frontend
is no longer necessary. 'oe-selftest' is adjusted to test both
frontends.

2. virgl itself is enabled by default in qemu, when 'opengl' is in
DISTRO_FEATURES. This adds a few native dependencies to qemu-system-native
(particularly, libdrm, virglrenderer and a special minimal configuration
of mesa-native). I tested the impact on build times: it is about 25-30
seconds on a 16 core machine. 'bitbake core-image-minimal' goes from
26m45 to 27m13.

Gtk qemu frontend remains disabled by default, as it adds more to the build times.

The following changes since commit f399b2d73b828f70536857e3e9189b1deb4a4143:

  poky: Use 5.2 kernel by default (2019-09-06 08:25:29 +0100)

are available in the Git repository at:

  git://git.yoctoproject.org/poky-contrib akanavin/qemu-split-virgl-gtk
  http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=akanavin/qemu-split-virgl-gtk

Alexander Kanavin (5):
  bitbake.conf: propagate 'opengl' DISTRO_FEATURE to native/nativesdk
    from target
  libsdl2: enable opengl option for native/nativesdk, subject to
    'opengl' in DISTRO_FEATURES
  qemu: enable virglrenderer and glx options subject to 'opengl'
    DISTRO_FEATURE
  runqemu: add options that enable virgl with the SDL frontend
  oe-selftest: extend virgl gtk test to also check the SDL option

 meta/conf/bitbake.conf                        |  4 +--
 meta/lib/oeqa/selftest/cases/runtime_test.py  | 29 ++++++++++---------
 .../qemu/qemu-system-native_4.1.0.bb          |  4 ++-
 meta/recipes-devtools/qemu/qemu_4.1.0.bb      |  5 +++-
 meta/recipes-gnome/gtk+/gtk+3.inc             |  2 ++
 meta/recipes-graphics/cairo/cairo_1.16.0.bb   |  2 ++
 .../libepoxy/libepoxy_1.5.3.bb                |  2 --
 .../libsdl2/libsdl2_2.0.10.bb                 |  4 +--
 .../virglrenderer/virglrenderer_0.8.0.bb      |  2 --
 scripts/runqemu                               | 15 ++++++++--
 10 files changed, 43 insertions(+), 26 deletions(-)

-- 
2.17.1