[PATCH v1 2/2] virtio-gpu: Document VIRTIO_GPU_CAPSET_DRM

[Dmitry Osipenko <dmitry.osipenko@collabora.com>]

Document VIRTIO_GPU_CAPSET_DRM that is capset for the DRM native context
protocols which implement Linux DRM UAPIs over VirtIO-GPU, effectively
exposing host GPU to a Linux guest like it's a native/baremetal GPU.

Link: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14900
Link: https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/693
Link: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21658
Link: https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/1274
Link: https://gitlab.freedesktop.org/digetx/mesa/-/commits/native-context-iris
Link: https://chromium.googlesource.com/chromiumos/platform/crosvm/+/69ecfb0e3913a4cd9048056f9a37cc496c7b9235
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
 device-types/gpu/description.tex | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/device-types/gpu/description.tex b/device-types/gpu/description.tex
index 4b8dd7733c31..29c8a97c3a3f 100644
--- a/device-types/gpu/description.tex
+++ b/device-types/gpu/description.tex
@@ -536,6 +536,8 @@ \subsubsection{Device Operation: controlq}\label{sec:Device Types / GPU Device /
 	Mesa's (mostly) autogenerated Vulkan protocol.
   \item \href{https://chromium.googlesource.com/chromiumos/platform/crosvm/+/refs/heads/main/rutabaga_gfx/src/cross_domain/cross_domain_protocol.rs}{VIRTIO_GPU_CAPSET_CROSS_DOMAIN} --
 	protocol for display virtualization via Wayland proxying.
+  \item \href{https://gitlab.freedesktop.org/virgl/virglrenderer/-/tree/master/src/drm}{VIRTIO_GPU_CAPSET_DRM} --
+	DRM native context protocols.
   \end{itemize*}
 
 \begin{lstlisting}
@@ -550,6 +552,7 @@ \subsubsection{Device Operation: controlq}\label{sec:Device Types / GPU Device /
 #define VIRTIO_GPU_CAPSET_GFXSTREAM_VULKAN 3
 #define VIRTIO_GPU_CAPSET_VENUS 4
 #define VIRTIO_GPU_CAPSET_CROSS_DOMAIN 5
+#define VIRTIO_GPU_CAPSET_DRM 6
 struct virtio_gpu_resp_capset_info {
         struct virtio_gpu_ctrl_hdr hdr;
         le32 capset_id;
-- 
2.41.0