doc: add documentation for accel subsystem

Add an introduction section for the accel subsystem. Most of the
relevant data is in the DRM documentation, so the introduction only
presents the why of the new subsystem, how are the compute accelerators
exposed to user-space and what changes need to be done in a standard
DRM driver to register it to the new accel subsystem.

Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Tested-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/Documentation/accel/index.rst b/Documentation/accel/index.rst
new file mode 100644
index 000000000000..2b43c9a7f67b
--- /dev/null
+++ b/Documentation/accel/index.rst
@@ -0,0 +1,17 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+====================
+Compute Accelerators
+====================
+
+.. toctree::
+   :maxdepth: 1
+
+   introduction
+
+.. only::  subproject and html
+
+   Indices
+   =======
+
+   * :ref:`genindex`