[Buildroot] [PATCH v2] qt5base: Qt KMS support does not depend on opengl

[Joshua Henderson]

Qt KMS support should not explicitly depend on the availability of opengl.
Don't explicitly disable KMS if opengl is not available and fallback to
detecting if libdrm is available before disabling kms.

The scenario where this is necessary involves using the Qt linuxfb backend
"dumb buffer" support via the DRM API.  This is new in Qt 5.9 [1] and only
requires KMS, but not opengl.

[1] http://doc.qt.io/qt-5/embedded-linux.html#linuxfb

Cc: Peter Seiderer <ps.report at gmx.net>
Cc: Julien Corjon <corjon.j at ecagroup.com>
Signed-off-by: Joshua Henderson <joshua.henderson at microchip.com>

---

v2:
- If libdrm is configured, make it an explicit dependency.
---
 package/qt5/qt5base/qt5base.mk | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/package/qt5/qt5base/qt5base.mk b/package/qt5/qt5base/qt5base.mk
index 0ca11a5..7234948 100644
--- a/package/qt5/qt5base/qt5base.mk
+++ b/package/qt5/qt5base/qt5base.mk
@@ -40,8 +40,13 @@ ifeq ($(BR2_PACKAGE_MESA3D_OPENGL_EGL),y)
 QT5BASE_CONFIGURE_OPTS += -kms -gbm
 QT5BASE_DEPENDENCIES += mesa3d
 else
+ifeq ($(BR2_PACKAGE_LIBDRM),y)
+QT5BASE_CONFIGURE_OPTS += -kms
+QT5BASE_DEPENDENCIES += libdrm
+else
 QT5BASE_CONFIGURE_OPTS += -no-kms
 endif
+endif
 
 ifeq ($(BR2_ENABLE_DEBUG),y)
 QT5BASE_CONFIGURE_OPTS += -debug
-- 
2.7.4