vl: add drm support for vl_screen

This will allow the state trackers to use render nodes
with screen creation

v2: dup fd for pipe loader

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

src/gallium/auxiliary/Makefile.sources

@@ -349,7 +349,8 @@ VL_SOURCES := \
 
 # XXX: Nuke this as our dri targets no longer depend on VL.
 VL_WINSYS_SOURCES := \
-	vl/vl_winsys_dri.c
+	vl/vl_winsys_dri.c \
+	vl/vl_winsys_drm.c
 
 VL_STUB_SOURCES := \
 	vl/vl_stubs.c

src/gallium/auxiliary/vl/vl_winsys.h

@@ -66,4 +66,10 @@ vl_screen_set_next_timestamp(struct vl_screen *vscreen, uint64_t stamp);
 void*
 vl_screen_get_private(struct vl_screen *vscreen);
 
+struct vl_screen*
+vl_drm_screen_create(int fd);
+
+void
+vl_drm_screen_destroy(struct vl_screen *vscreen);
+
 #endif

src/gallium/auxiliary/vl/vl_winsys_drm.c

@@ -0,0 +1,77 @@
+/**************************************************************************
+ *
+ * Copyright 2015 Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include <assert.h>
+
+#include "pipe/p_screen.h"
+#include "pipe-loader/pipe_loader.h"
+#include "state_tracker/drm_driver.h"
+
+#include "util/u_memory.h"
+#include "vl/vl_winsys.h"
+
+struct vl_screen*
+vl_drm_screen_create(int fd)
+{
+   struct vl_screen *vscreen;
+
+   vscreen = CALLOC_STRUCT(vl_screen);
+   if (!vscreen)
+      return NULL;
+
+#if GALLIUM_STATIC_TARGETS
+   vscreen->pscreen = dd_create_screen(fd);
+#else
+   if (pipe_loader_drm_probe_fd(&vscreen->dev, dup(fd))) {
+      vscreen->pscreen =
+         pipe_loader_create_screen(vscreen->dev, PIPE_SEARCH_DIR);
+      if (!vscreen->pscreen)
+         pipe_loader_release(&vscreen->dev, 1);
+   }
+#endif
+
+   if (!vscreen->pscreen) {
+      FREE(vscreen);
+      return NULL;
+   }
+
+   return vscreen;
+}
+
+void
+vl_drm_screen_destroy(struct vl_screen *vscreen)
+{
+   assert(vscreen);
+
+   vscreen->pscreen->destroy(vscreen->pscreen);
+
+#if !GALLIUM_STATIC_TARGETS
+   pipe_loader_release(&vscreen->dev, 1);
+#endif
+
+   FREE(vscreen);
+}