[Mesa-dev] [PATCH 2/2] i915g: add dma-buf support to i915_drm_buffer_get_handle

[Nicholas Bishop]

The implementation of i915_drm_buffer_get_handle now handles
DRM_API_HANDLE_TYPE_FD in the same way that intel_winsys_import_handle
does, by calling drm_intel_bo_gem_create_from_prime.

Tested by successfully running Chrome's ozone_demo [1] with the
ozone-gbm backend on an Intel Pineview M machine. Without this change
it fails while trying to create a DMA-BUF.

[1] https://chromium.googlesource.com/chromium/src.git/+/master/ui/ozone/demo/ozone_demo.cc

Signed-off-by: Nicholas Bishop <nbishop at neverware.com>
---
 src/gallium/winsys/i915/drm/i915_drm_buffer.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/gallium/winsys/i915/drm/i915_drm_buffer.c b/src/gallium/winsys/i915/drm/i915_drm_buffer.c
index ba454ec..4080a08 100644
--- a/src/gallium/winsys/i915/drm/i915_drm_buffer.c
+++ b/src/gallium/winsys/i915/drm/i915_drm_buffer.c
@@ -153,6 +153,14 @@ i915_drm_buffer_get_handle(struct i915_winsys *iws,
       whandle->handle = buf->flink;
    } else if (whandle->type == DRM_API_HANDLE_TYPE_KMS) {
       whandle->handle = buf->bo->handle;
+   } else if (whandle->type == DRM_API_HANDLE_TYPE_FD) {
+      int fd;
+      int err;
+
+      err = drm_intel_bo_gem_export_to_prime(buf->bo, &fd);
+      if (err)
+         return FALSE;
+      whandle->handle = fd;
    } else {
       assert(!"unknown usage");
       return FALSE;
-- 
2.7.4