Build fix for older libdrm versions.

When building against an older libdrm, the DRM_FORMAT_MOD_LINEAR enum
will be missing. It's OK to use DRM_FORMAT_MOD_NONE instead, because
this older libdrm has limited DRM_FORMAT_MOD_xx support and not all of
the backends actually need it.

Change-Id: I0c289c50de4ad1fe5a9b0848961f5bcb75bd4bf8
Reviewed-on: https://chromium-review.googlesource.com/971358
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Alistair Strachan <astrachan@google.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>

diff --git a/drv_priv.h b/drv_priv.h
index 21c003b..e2bb019 100644 (file)
--- a/drv_priv.h
+++ b/drv_priv.h
@@ -92,6 +92,10 @@ struct backend {
 
 #define BO_USE_SW_RARELY BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY
 
+#ifndef DRM_FORMAT_MOD_LINEAR
+#define DRM_FORMAT_MOD_LINEAR DRM_FORMAT_MOD_NONE
+#endif
+
 #define LINEAR_METADATA (struct format_metadata) { 0, 1, DRM_FORMAT_MOD_LINEAR }
 // clang-format on