linux-kernel - Re: [PATCH v6 0/8] Cedrus driver for the Allwinner Video Engine, using media requests

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Message-ID: <4e8a0286-7e49-5622-1895-ac3268224152@xs4all.nl>
Date:   Sat, 4 Aug 2018 14:43:48 +0200
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devel@...verdev.osuosl.org
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        linux-sunxi@...glegroups.com,
        Hugues Fruchet <hugues.fruchet@...com>,
        Randy Li <ayaka@...lik.info>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Subject: Re: [PATCH v6 0/8] Cedrus driver for the Allwinner Video Engine,
 using media requests

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

> * 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?

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

Regards,

	Hans