Check against libdrm version 2.4.68 in order to enable/disable

plain DRM video driver

Makefile.common

@@ -677,12 +677,15 @@ OBJ += gfx/video_context_driver.o \
 
 ifeq ($(HAVE_KMS), 1)
 	HAVE_AND_WILL_USE_DRM = 1
-	OBJ += gfx/drivers_context/drm_ctx.o \
-			 gfx/drivers/drm_gfx.o
+	OBJ += gfx/drivers_context/drm_ctx.o
 	DEFINES += $(GBM_CFLAGS) $(DRM_CFLAGS) $(EGL_CFLAGS)
 	LIBS += $(GBM_LIBS) $(DRM_LIBS) $(EGL_LIBS)
 endif
 
+ifeq ($(HAVE_PLAIN_DRM), 1)
+	OBJ += gfx/drivers/drm_gfx.o
+endif
+
 ifeq ($(HAVE_GL_CONTEXT), 1)
    DEFINES += -DHAVE_OPENGL -DHAVE_GLSL
    OBJ += gfx/drivers/gl.o \

gfx/video_driver.c

@@ -200,7 +200,7 @@ static const video_driver_t *video_drivers[] = {
 #ifdef HAVE_SUNXI
    &video_sunxi,
 #endif
-#ifdef HAVE_KMS
+#ifdef HAVE_PLAIN_DRM
    &video_drm,
 #endif
    &video_null,

griffin/griffin.c

@@ -278,7 +278,7 @@ VIDEO DRIVER
 #include "../gfx/drivers/vulkan.c"
 #endif
 
-#if defined(HAVE_KMS)
+#if defined(HAVE_PLAIN_DRM)
 #include "../gfx/drivers/drm_gfx.c"
 #endif
 

qb/config.libs.sh

@@ -309,6 +309,7 @@ fi
 if [ "$HAVE_KMS" != "no" ]; then
    check_pkgconf GBM gbm 9.0
    check_pkgconf DRM libdrm
+   check_pkgconf PLAIN_DRM libdrm 2.4.68
    if [ "$HAVE_GBM" = "yes" ] && [ "$HAVE_DRM" = "yes" ] && [ "$HAVE_EGL" = "yes" ]; then
       HAVE_KMS=yes
    elif [ "$HAVE_KMS" = "yes" ]; then