meson: kmsro: require dri3 for X11

The current implementation in kmsro relies on buffer sharing using
WINSYS_HANDLE_TYPE_FD, which in x11 is only used by default when dri3
is enabled.
Since the current implementation will not work without it, we can
prevent user error by checking that it is not disabled at configuration
time.

Closes #4861

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11305>

diff --git a/meson.build b/meson.build
index e7d8082..f683984 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -534,6 +534,10 @@ if with_dri
   endif
 endif
 
+if with_gallium_kmsro and (with_platform_x11 and not with_dri3)
+  error('kmsro requires dri3 for X11 support')
+endif
+
 _vdpau = get_option('gallium-vdpau')
 if _vdpau == 'true'
   _vdpau = 'enabled'