Mesa (main): loader/dri3: create linear buffer with scanout support

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Module: Mesa
Branch: main
Commit: f1a66e7c90ceb4796085989d0d8374689753121e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f1a66e7c90ceb4796085989d0d8374689753121e

Author: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Date:   Sat Jul 17 17:38:42 2021 +0300

loader/dri3: create linear buffer with scanout support

If we have a different GPU dealing with display, we fallback to
exchanging linear buffers with the compositor. We should specify in
creating the linear buffer that this could be used for display.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4706
Cc: mesa-stable
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>
Reviewed-by: Marek Olšák <marek.olsak at amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11942>

---

 src/loader/loader_dri3_helper.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/loader/loader_dri3_helper.c b/src/loader/loader_dri3_helper.c
index 608eff5e11d..6e825f9a898 100644
--- a/src/loader/loader_dri3_helper.c
+++ b/src/loader/loader_dri3_helper.c
@@ -1448,7 +1448,8 @@ dri3_alloc_render_buffer(struct loader_dri3_drawable *draw, unsigned int format,
                                          dri3_linear_format_for_format(draw, format),
                                          __DRI_IMAGE_USE_SHARE |
                                          __DRI_IMAGE_USE_LINEAR |
-                                         __DRI_IMAGE_USE_BACKBUFFER,
+                                         __DRI_IMAGE_USE_BACKBUFFER |
+                                         __DRI_IMAGE_USE_SCANOUT,
                                          buffer);
          pixmap_buffer = linear_buffer_display_gpu;
       }
@@ -1460,7 +1461,8 @@ dri3_alloc_render_buffer(struct loader_dri3_drawable *draw, unsigned int format,
                                          dri3_linear_format_for_format(draw, format),
                                          __DRI_IMAGE_USE_SHARE |
                                          __DRI_IMAGE_USE_LINEAR |
-                                         __DRI_IMAGE_USE_BACKBUFFER,
+                                         __DRI_IMAGE_USE_BACKBUFFER |
+                                         __DRI_IMAGE_USE_SCANOUT,
                                          buffer);
 
          pixmap_buffer = buffer->linear_buffer;