DRI2: Allow building without libdrm

Some drivers use DRI protocol but implement their own kernel rendering
manager. For these drivers, libdrm becomes useless. --disable-libdrm
configure parameter can be used to disable libdrm support in dri2.

To provide ABI/API compatibility for libdrm based drivers, libdrm call
is wrapped in ifdef.

Signed-off-by: Tiago Vignatti <tiago.vignatti@nokia.com>
Signed-off-by: Pauli Nieminen <ext-pauli.nieminen@nokia.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>

3 files changed, 18 insertions, 4 deletions

diff --git a/hw/xfree86/dri2/dri2.c b/hw/xfree86/dri2/dri2.c
index 03255a25d..e1ccdae93 100644
--- a/hw/xfree86/dri2/dri2.c
+++ b/hw/xfree86/dri2/dri2.c
@@ -35,7 +35,9 @@
 #endif
 
 #include <errno.h>
+#ifdef WITH_LIBDRM
 #include <xf86drm.h>
+#endif
 #include "xf86Module.h"
 #include "list.h"
 #include "scrnintstr.h"
@@ -965,7 +967,7 @@ DRI2Connect(ScreenPtr pScreen, unsigned int driverType, int *fd,
 }
 
 Bool
-DRI2Authenticate(ScreenPtr pScreen, drm_magic_t magic)
+DRI2Authenticate(ScreenPtr pScreen, uint32_t magic)
 {
     DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
 
@@ -1045,9 +1047,16 @@ DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
         ds->AuthMagic = info->AuthMagic;
     }
 
+    /*
+     * if the driver doesn't provide an AuthMagic function or the info struct
+     * version is too low, it relies on the old method (using libdrm) or fail
+     */
     if (!ds->AuthMagic)
+#ifdef WITH_LIBDRM
         ds->AuthMagic = drmAuthMagic;
-
+#else
+        goto err_out;
+#endif
 
     /* Initialize minor if needed and set to minimum provied by DDX */
     if (!dri2_minor || dri2_minor > cur_minor)
@@ -1087,6 +1096,12 @@ DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
     }
 
     return TRUE;
+
+err_out:
+    xf86DrvMsg(pScreen->myNum, X_WARNING,
+            "[DRI2] Initialization failed for info version %d.\n", info->version);
+    free(ds);
+    return FALSE;
 }
 
 void
diff --git a/hw/xfree86/dri2/dri2.h b/hw/xfree86/dri2/dri2.h
index 29b1d9b2e..f08ca29f3 100644
--- a/hw/xfree86/dri2/dri2.h
+++ b/hw/xfree86/dri2/dri2.h
@@ -206,7 +206,7 @@ extern _X_EXPORT Bool DRI2Connect(ScreenPtr pScreen,
 		 const char **driverName,
 		 const char **deviceName);
 
-extern _X_EXPORT Bool DRI2Authenticate(ScreenPtr pScreen, drm_magic_t magic);
+extern _X_EXPORT Bool DRI2Authenticate(ScreenPtr pScreen, uint32_t magic);
 
 extern _X_EXPORT int DRI2CreateDrawable(ClientPtr client,
 					DrawablePtr pDraw,
diff --git a/hw/xfree86/dri2/dri2ext.c b/hw/xfree86/dri2/dri2ext.c
index e6d98f53b..db04268cb 100644
--- a/hw/xfree86/dri2/dri2ext.c
+++ b/hw/xfree86/dri2/dri2ext.c
@@ -42,7 +42,6 @@
 #include "scrnintstr.h"
 #include "pixmapstr.h"
 #include "extnsionst.h"
-#include "xf86drm.h"
 #include "xfixes.h"
 #include "dri2.h"
 #include "protocol-versions.h"