From e5a81ac70431502bc592c05e4ae639c0504ec816 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Wed, 24 Jan 2018 14:23:01 +1100
Subject: broadcom/vc5: Don't forget to get the BO offset when opening a
 dmabuf.

Fixes black display in DRI due to storing to 0x00000000.
---
 src/gallium/drivers/vc5/vc5_bufmgr.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/gallium/drivers/vc5/vc5_bufmgr.c b/src/gallium/drivers/vc5/vc5_bufmgr.c
index c6c06dcfda7..5e068400fd8 100644
--- a/src/gallium/drivers/vc5/vc5_bufmgr.c
+++ b/src/gallium/drivers/vc5/vc5_bufmgr.c
@@ -348,6 +348,18 @@ vc5_bo_open_handle(struct vc5_screen *screen,
         bo->name = "winsys";
         bo->private = false;
 
+        struct drm_vc5_get_bo_offset get = {
+                .handle = handle,
+        };
+        int ret = vc5_ioctl(screen->fd, DRM_IOCTL_VC5_GET_BO_OFFSET, &get);
+        if (ret) {
+                fprintf(stderr, "Failed to get BO offset: %s\n",
+                        strerror(errno));
+                free(bo);
+                return NULL;
+        }
+        bo->offset = get.offset;
+
 #ifdef USE_VC5_SIMULATOR
         vc5_simulator_open_from_handle(screen->fd, winsys_stride,
                                        bo->handle, bo->size);
-- 
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