configure/freedreno: make KGSL support optional

libdrm_freedreno currently supports two backends, 'msm' for the upstream
drm/msm driver, and 'kgsl' which supports (to some extent), the android/
downstream kgsl driver plus a sort of drm shim nonsense to get flink
names.

However, kgsl support is strictly on a best-effort basis.  Different
android devices with different versions of kgsl may have different
abi's.  And the existing kgsl interface (at least the parts of it that
we use) is completely broken for 64bit.  Lets disable it by default lest
anyone actually try to use it.

Signed-off-by: Rob Clark <robclark@freedesktop.org>

4 files changed, 29 insertions, 12 deletions

diff --git a/configure.ac b/configure.ac
index c88a1c51..0412d5b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -98,6 +98,11 @@ AC_ARG_ENABLE(freedreno-experimental-api,
 	      [Enable support for freedreno's experimental API (default: disabled)]),
 	      [FREEDRENO=$enableval], [FREEDRENO=no])
 
+AC_ARG_ENABLE(freedreno-kgsl,
+	      AS_HELP_STRING([--enable-freedreno-kgsl],
+	      [Enable support for freedreno's to use downstream android kernel API (default: disabled)]),
+	      [FREEDRENO_KGSL=$enableval], [FREEDRENO_KGSL=no])
+
 AC_ARG_ENABLE(tegra-experimental-api,
 	      AS_HELP_STRING([--enable-tegra-experimental-api],
 	      [Enable support for Tegra's experimental API (default: disabled)]),
@@ -304,6 +309,11 @@ if test "x$FREEDRENO" = xyes; then
 	AC_DEFINE(HAVE_FREEDRENO, 1, [Have freedreno support])
 fi
 
+AM_CONDITIONAL(HAVE_FREEDRENO_KGSL, [test "x$FREEDRENO_KGSL" = xyes])
+if test "x$FREEDRENO_KGSL" = xyes; then
+	AC_DEFINE(HAVE_FREEDRENO_KGSL, 1, [Have freedreno support for KGSL kernel interface])
+fi
+
 AM_CONDITIONAL(HAVE_RADEON, [test "x$RADEON" = xyes])
 if test "x$RADEON" = xyes; then
 	AC_DEFINE(HAVE_RADEON, 1, [Have radeon support])
@@ -438,6 +448,6 @@ echo "  Radeon API     $RADEON"
 echo "  Nouveau API    $NOUVEAU"
 echo "  OMAP API       $OMAP"
 echo "  EXYNOS API     $EXYNOS"
-echo "  Freedreno API  $FREEDRENO"
+echo "  Freedreno API  $FREEDRENO (kgsl: $FREEDRENO_KGSL)"
 echo "  Tegra API      $TEGRA"
 echo ""
diff --git a/freedreno/Makefile.am b/freedreno/Makefile.am
index 4818431a..4482afe2 100644
--- a/freedreno/Makefile.am
+++ b/freedreno/Makefile.am
@@ -15,6 +15,9 @@ libdrm_freedreno_la_LDFLAGS = -version-number 1:0:0 -no-undefined
 libdrm_freedreno_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@
 
 libdrm_freedreno_la_SOURCES = $(LIBDRM_FREEDRENO_FILES)
+if HAVE_FREEDRENO_KGSL
+libdrm_freedreno_la_SOURCES += $(LIBDRM_FREEDRENO_KGSL_FILES)
+endif
 
 libdrm_freedrenocommonincludedir = ${includedir}/freedreno
 libdrm_freedrenocommoninclude_HEADERS = $(LIBDRM_FREEDRENO_H_FILES)
diff --git a/freedreno/Makefile.sources b/freedreno/Makefile.sources
index 91020dff..c8c0244f 100644
--- a/freedreno/Makefile.sources
+++ b/freedreno/Makefile.sources
@@ -4,13 +4,6 @@ LIBDRM_FREEDRENO_FILES := \
 	freedreno_priv.h \
 	freedreno_ringbuffer.c \
 	freedreno_bo.c \
-	kgsl/kgsl_bo.c \
-	kgsl/kgsl_device.c \
-	kgsl/kgsl_drm.h \
-	kgsl/kgsl_pipe.c \
-	kgsl/kgsl_priv.h \
-	kgsl/kgsl_ringbuffer.c \
-	kgsl/msm_kgsl.h \
 	msm/msm_bo.c \
 	msm/msm_device.c \
 	msm/msm_drm.h \
@@ -19,6 +12,15 @@ LIBDRM_FREEDRENO_FILES := \
 	msm/msm_ringbuffer.c \
 	list.h
 
+LIBDRM_FREEDRENO_KGSL_FILES := \
+	kgsl/kgsl_bo.c \
+	kgsl/kgsl_device.c \
+	kgsl/kgsl_drm.h \
+	kgsl/kgsl_pipe.c \
+	kgsl/kgsl_priv.h \
+	kgsl/kgsl_ringbuffer.c \
+	kgsl/msm_kgsl.h
+
 LIBDRM_FREEDRENO_H_FILES := \
 	freedreno_drmif.h \
 	freedreno_ringbuffer.h
diff --git a/freedreno/freedreno_device.c b/freedreno/freedreno_device.c
index 09bc5e97..e8b5f60f 100644
--- a/freedreno/freedreno_device.c
+++ b/freedreno/freedreno_device.c
@@ -92,12 +92,14 @@ drm_public struct fd_device * fd_device_new(int fd)
 		return NULL;
 	}
 
-	if (!strcmp(version->name, "kgsl")) {
-		DEBUG_MSG("kgsl DRM device");
-		dev = kgsl_device_new(fd);
-	} else if (!strcmp(version->name, "msm")) {
+	if (!strcmp(version->name, "msm")) {
 		DEBUG_MSG("msm DRM device");
 		dev = msm_device_new(fd);
+#ifdef HAVE_FREEDRENO_KGSL
+	} else if (!strcmp(version->name, "kgsl")) {
+		DEBUG_MSG("kgsl DRM device");
+		dev = kgsl_device_new(fd);
+#endif
 	} else {
 		ERROR_MSG("unknown device: %s", version->name);
 		dev = NULL;