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hwcontext_vaapi: Don't require a render node when deriving from DRM

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The V4L2 driver does not actually have an associated DRM device at all, so
users work around the requirement by giving libva an unrelated display-only
device instead (which is fine, because it doesn't actually do anything with
that device).  This was broken by bc9b6358fb
forcing a render node, because the display-only device did not have an
associated render node to use.  Fix that by just passing through the
original non-render DRM fd if we can't find a render node.

Reported-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Tested-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
This commit is contained in:
Mark Thompson
2020-08-28 23:15:41 +01:00
parent 04d335e436
commit 303d252a4b
1 changed files with 16 additions and 12 deletions
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28
libavutil/hwcontext_vaapi.c
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@@ -1677,20 +1677,24 @@ static int vaapi_device_derive(AVHWDeviceContext *ctx,
} else {
render_node = drmGetRenderDeviceNameFromFd(src_hwctx->fd);
if (!render_node) {
av_log(ctx, AV_LOG_ERROR, "Failed to find a render node "
"matching the DRM device.\n");
return AVERROR(ENODEV);
}
fd = open(render_node, O_RDWR);
if (fd < 0) {
av_log(ctx, AV_LOG_ERROR, "Failed to open render node %s"
"matching the DRM device.\n", render_node);
av_log(ctx, AV_LOG_VERBOSE, "Using non-render node "
"because the device does not have an "
"associated render node.\n");
fd = src_hwctx->fd;
} else {
fd = open(render_node, O_RDWR);
if (fd < 0) {
av_log(ctx, AV_LOG_VERBOSE, "Using non-render node "
"because the associated render node "
"could not be opened.\n");
fd = src_hwctx->fd;
} else {
av_log(ctx, AV_LOG_VERBOSE, "Using render node %s "
"in place of non-render DRM device.\n",
render_node);
}
free(render_node);
return AVERROR(errno);
}
av_log(ctx, AV_LOG_VERBOSE, "Using render node %s in place "
"of non-render DRM device.\n", render_node);
free(render_node);
}
}
#else