From 1825627cf86d3762217d0c3ff86628c899ca0d73 Mon Sep 17 00:00:00 2001
From: David Rosca <david.rosca@amd.com>
Date: Mon, 8 Jun 2026 15:55:01 +0200
Subject: [PATCH] va: Set contiguous_planes for DMA-BUF imported surfaces

Set contiguous_planes if all planes share the same fd.
This makes vaDeriveImage work with DMA-BUF imported surfaces.

Reviewed-by: Boyuan Zhang <Boyuan.Zhang@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/42086>
---
 src/gallium/frontends/va/surface.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/gallium/frontends/va/surface.c b/src/gallium/frontends/va/surface.c
index cb92a8ae101..ffa0524cba9 100644
--- a/src/gallium/frontends/va/surface.c
+++ b/src/gallium/frontends/va/surface.c
@@ -35,6 +35,7 @@
 #include "util/u_sampler.h"
 #include "util/u_video.h"
 #include "util/set.h"
+#include "util/os_file.h"
 
 #include "vl/vl_compositor.h"
 #include "vl/vl_video_buffer.h"
@@ -679,6 +680,13 @@ surface_from_prime(VADriverContextP ctx, vlVaSurface *surface,
       result = VA_STATUS_ERROR_ALLOCATION_FAILED;
       goto fail;
    }
+
+   surface->buffer->contiguous_planes = true;
+   for (uint32_t i = 1; i < desc->num_objects; i++) {
+      if (os_same_file_description(desc->objects[0].fd, desc->objects[i].fd) != 0)
+         surface->buffer->contiguous_planes = false;
+   }
+
    return VA_STATUS_SUCCESS;
 
 fail: