From: Julien Isorce <j.isorce@samsung.com>
Date: Tue, 14 Jun 2016 07:40:33 +0000 (+0100)
Subject: st/va: ensure linear memory for dmabuf
X-Git-Tag: upstream/17.1.0~8748
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1cdb4da1d6ce94d947e41d4f0e568074f4f59577;p=platform%2Fupstream%2Fmesa.git

st/va: ensure linear memory for dmabuf

In order to do zero-copy between two different devices
the memory should not be tiled.

Tested with GStreamer on a laptop that has 2 GPUs:
1- gstvaapidecode:
   HW decoding and dmabuf export with nouveau driver on Nvidia GPU.
2- glimagesink:
   EGLImage imports dmabuf on Intel GPU.

TEST: DRI_PRIME=1 gst-launch vaapidecodebin ! glimagesink

Signed-off-by: Julien Isorce <j.isorce@samsung.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
---

diff --git a/src/gallium/auxiliary/vl/vl_video_buffer.c b/src/gallium/auxiliary/vl/vl_video_buffer.c
index 4a68ac1..fdc9598 100644
--- a/src/gallium/auxiliary/vl/vl_video_buffer.c
+++ b/src/gallium/auxiliary/vl/vl_video_buffer.c
@@ -250,7 +250,7 @@ vl_video_buffer_template(struct pipe_resource *templ,
    templ->height0 = tmpl->height;
    templ->depth0 = depth;
    templ->array_size = array_size;
-   templ->bind = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET;
+   templ->bind = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET | tmpl->bind;
    templ->usage = usage;
 
    vl_video_buffer_adjust_size(&templ->width0, &templ->height0, plane,
diff --git a/src/gallium/include/pipe/p_video_codec.h b/src/gallium/include/pipe/p_video_codec.h
index b5575ab..b4b2b9c 100644
--- a/src/gallium/include/pipe/p_video_codec.h
+++ b/src/gallium/include/pipe/p_video_codec.h
@@ -126,6 +126,7 @@ struct pipe_video_buffer
    unsigned width;
    unsigned height;
    bool interlaced;
+   unsigned bind;
 
    /**
     * destroy this video buffer
diff --git a/src/gallium/state_trackers/va/surface.c b/src/gallium/state_trackers/va/surface.c
index 8a6a397..5efb893 100644
--- a/src/gallium/state_trackers/va/surface.c
+++ b/src/gallium/state_trackers/va/surface.c
@@ -621,6 +621,14 @@ vlVaCreateSurfaces2(VADriverContextP ctx, unsigned int format,
 
       switch (memory_type) {
       case VA_SURFACE_ATTRIB_MEM_TYPE_VA:
+         /* The application will clear the TILING flag when the surface is
+          * intended to be exported as dmabuf. Adding shared flag because not
+          * null memory_attibute means VASurfaceAttribExternalBuffers is used.
+          */
+         if (memory_attibute &&
+             !(memory_attibute->flags & VA_SURFACE_EXTBUF_DESC_ENABLE_TILING))
+            templat.bind = PIPE_BIND_LINEAR | PIPE_BIND_SHARED;
+
          surf->buffer = drv->pipe->create_video_buffer(drv->pipe, &templat);
          if (!surf->buffer) {
             FREE(surf);