[PATCH v6 0/8] Cedrus driver for the Allwinner Video Engine, using media requests

Hi,

On Sat, 2018-08-04 at 14:43 +0200, Hans Verkuil wrote:

On 07/25/2018 12:02 PM, Paul Kocialkowski wrote:

quoted

This is the sixth iteration of the updated Cedrus driver,
that supports the Video Engine found in most Allwinner SoCs, starting
with the A10. It was tested on the A13, A20, A33 and H3.

The initial version of this driver[0] was originally written and
submitted by Florent Revest using a previous version of the request API
that is necessary to provide coherency between controls and the buffers
they apply to.

The driver was adapted to use the latest version of the media request
API[1], as submitted by Hand Verkuil. Media request API support is a
hard requirement for the Cedrus driver.

The driver itself currently only supports MPEG2 and more codecs will be
added to the driver eventually. The output frames provided by the
Video Engine are in a multi-planar 32x32-tiled YUV format, with a plane
for luminance (Y) and a plane for chrominance (UV). A specific format is
introduced in the V4L2 API to describe it.

This implementation is based on the significant work that was conducted
by various members of the linux-sunxi community for understanding and
documenting the Video Engine's innards.

In addition to the media requests API, the following series are required
for Cedrus:
* vicodec: the Virtual Codec driver

This will appear in for 4.19.

quoted

* allwinner: a64: add SRAM controller / system control
* SRAM patches from the Cedrus VPU driver series version 5

What about these? Are they queued up for 4.19 as well?

Yes, they are queued for 4.19 through Maxime's tree[0].

I'll post a rebased reqv17 later today that includes the
"add v4l2_ctrl_request_hdl_find/put/ctrl_find functions" patch.

Great, I'll rebase and send a new version (taking in account your latest
review) as soon as time allows!

Cheers,

Paul

[0]: https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux.git/log/?h=sunxi/for-next

-- 
Paul Kocialkowski, Bootlin (formerly Free Electrons)
Embedded Linux and kernel engineering
https://bootlin.com
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