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va: allocator: dma: Fail when mapping the non-linear buffer.

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The current way of DMA buffer mapping is simply forwarding the job
to parent's map function, which is a mmap(). That can not handle the
non-linear buffers, such as tiling, compressed, etc. The incorrect
mapping of such buffers causes broken images, which are recognized
as bugs. We should directly block this kind of mapping to avoid the
misunderstanding.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2353>
This commit is contained in:
He Junyan 2021-06-29 23:21:24 +08:00 committed by GStreamer Marge Bot
parent 8fd2c68968
commit fb4aeb6636
1 changed files with 11 additions and 13 deletions
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24
sys/va/gstvaallocator.c
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@ -505,22 +505,20 @@ gst_va_dmabuf_mem_map (GstMemory * gmem, gsize maxsize, GstMapFlags flags)
{
GstVaDmabufAllocator *self = GST_VA_DMABUF_ALLOCATOR (gmem->allocator);
VASurfaceID surface = gst_va_memory_get_surface (gmem);
guint64 *drm_mod;
drm_mod = gst_mini_object_get_qdata (GST_MINI_OBJECT (gmem),
gst_va_drm_mod_quark ());
/* 0 is DRM_FORMAT_MOD_LINEAR, we do not include its header now. */
if (*drm_mod != 0) {
GST_ERROR_OBJECT (self, "Failed to map the dmabuf because the modifier "
"is: %#lx, which is not linear.", *drm_mod);
return NULL;
}
_sync_surface (self->display, surface);
/* @TODO: if mapping with flag GST_MAP_VASURFACE return the
* VA_SURFACE_ID.
* if mapping and drm_modifers are not lineal, use vaDeriveImage */
#ifndef GST_DISABLE_GST_DEBUG
{
guint64 *drm_mod;
drm_mod = gst_mini_object_get_qdata (GST_MINI_OBJECT (gmem),
gst_va_drm_mod_quark ());
GST_TRACE_OBJECT (self, "DRM modifiers: %#lx", *drm_mod);
}
#endif
return self->parent_map (gmem, maxsize, flags);
}