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-rw-r--r--libdrm/intel/intel_bufmgr.h2
-rw-r--r--libdrm/intel/intel_bufmgr_gem.c23
2 files changed, 25 insertions, 0 deletions
diff --git a/libdrm/intel/intel_bufmgr.h b/libdrm/intel/intel_bufmgr.h
index 75d06cad..758558df 100644
--- a/libdrm/intel/intel_bufmgr.h
+++ b/libdrm/intel/intel_bufmgr.h
@@ -120,6 +120,8 @@ int drm_intel_gem_bo_map_gtt(drm_intel_bo *bo);
int drm_intel_gem_bo_unmap_gtt(drm_intel_bo *bo);
void drm_intel_gem_bo_start_gtt_access(drm_intel_bo *bo, int write_enable);
+int drm_intel_get_pipe_from_crtc_id(drm_intel_bufmgr *bufmgr, int crtc_id);
+
/* drm_intel_bufmgr_fake.c */
drm_intel_bufmgr *drm_intel_bufmgr_fake_init(int fd,
unsigned long low_offset,
diff --git a/libdrm/intel/intel_bufmgr_gem.c b/libdrm/intel/intel_bufmgr_gem.c
index 5ae4d668..3f792da1 100644
--- a/libdrm/intel/intel_bufmgr_gem.c
+++ b/libdrm/intel/intel_bufmgr_gem.c
@@ -815,6 +815,29 @@ drm_intel_gem_bo_subdata (drm_intel_bo *bo, unsigned long offset,
return 0;
}
+int
+drm_intel_get_pipe_from_crtc_id (drm_intel_bufmgr *bufmgr, int crtc_id)
+{
+ drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr;
+ struct drm_i915_get_pipe_from_crtc_id get_pipe_from_crtc_id;
+ int ret;
+
+ get_pipe_from_crtc_id.crtc_id = crtc_id;
+ ret = ioctl (bufmgr_gem->fd, DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID,
+ &get_pipe_from_crtc_id);
+ if (ret != 0) {
+ /* We're intentionally silent here so that there is no
+ * complaint when simply running with an older kernel that
+ * doesn't have the GET_PIPE_FROM_CRTC_ID ioctly. In that
+ * case, we just punt and try to sync on pipe 0, which is
+ * hopefully the right pipe in some cases at least.
+ */
+ return 0;
+ }
+
+ return get_pipe_from_crtc_id.pipe;
+}
+
static int
drm_intel_gem_bo_get_subdata (drm_intel_bo *bo, unsigned long offset,
unsigned long size, void *data)