linux-kernel - Re: [RFC V2 0/2] arm64: imx8mm: Enable Hantro VPUs

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Date:   Wed, 1 Dec 2021 10:27:58 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     Adam Ford <aford173@...il.com>, linux-media@...r.kernel.org
Cc:     ezequiel@...guardiasur.com.ar, hverkuil@...all.nl,
        tharvey@...eworks.com, nicolas@...fresne.ca,
        aford@...conembedded.com, Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-staging@...ts.linux.dev
Subject: Re: [RFC V2 0/2] arm64: imx8mm: Enable Hantro VPUs


Le 01/12/2021 à 02:33, Adam Ford a écrit :
> The i.MX8M has two Hantro video decoders, called G1 and G2 which appear
> to be related to the video decoders used on the i.MX8MQ, but because of
> how the Mini handles the power domains, the VPU driver does not need to
> handle all the functions, nor does it support the post-processor,
> so a new compatible flag is required.
>
> With the suggestion from Hans Verkuil, I was able to get the G2 splat to go away
> with changes to FORCE_MAX_ZONEORDER, but I found I could also set cma=512M, however
> it's unclear to me if that's an acceptable alternative.
>
> At the suggestion of Ezequiel Garcia and Nicolas Dufresne I have some
> results from Fluster. However, the G2 VPU appears to fail most tests.
>
> ./fluster.py run -dGStreamer-H.264-V4L2SL-Gst1.0
> Ran 90/135 tests successfully               in 76.431 secs
>
>   ./fluster.py run -d GStreamer-VP8-V4L2SL-Gst1.0
> Ran 55/61 tests successfully               in 21.454 secs
>
> ./fluster.py run -d GStreamer-VP9-V4L2SL-Gst1.0
> Ran 0/303 tests successfully               in 20.016 secs
>
> Each day seems to show more and more G2 submissions, and gstreamer seems to be
> still working on the VP9, so I am not sure if I should drop G2 as well.

I think it is going in the good direction.
I'm trying to do the same on IMX6MQ but still have hang issue on G2.

Regards,
Benjamin

>
> Adam Ford (2):
>    media: hantro: Add support for i.MX8M Mini
>    arm64: dts: imx8mm: Enable VPU-G1 and VPU-G2
>
>   arch/arm64/boot/dts/freescale/imx8mm.dtsi   | 41 +++++++++++++++
>   drivers/staging/media/hantro/hantro_drv.c   |  2 +
>   drivers/staging/media/hantro/hantro_hw.h    |  2 +
>   drivers/staging/media/hantro/imx8m_vpu_hw.c | 57 +++++++++++++++++++++
>   4 files changed, 102 insertions(+)
>