linux-kernel - Re: [PATCH v8 09/34] dt-bindings: host1x: Document Memory Client resets of Host1x, GR2D and GR3D

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Date:   Tue, 17 Aug 2021 20:16:08 -0500
From:   Rob Herring <robh@...nel.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Peter Chen <peter.chen@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Richard Weinberger <richard@....at>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Lucas Stach <dev@...xeye.de>, Stefan Agner <stefan@...er.ch>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-spi@...r.kernel.org,
        linux-pwm@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-mmc@...r.kernel.org, linux-media@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH v8 09/34] dt-bindings: host1x: Document Memory Client
 resets of Host1x, GR2D and GR3D

On Tue, Aug 17, 2021 at 04:27:29AM +0300, Dmitry Osipenko wrote:
> Memory Client should be blocked before hardware reset is asserted in order
> to prevent memory corruption and hanging of memory controller.
> 
> Document Memory Client resets of Host1x, GR2D and GR3D hardware units.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  .../bindings/display/tegra/nvidia,tegra20-host1x.txt          | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
> index 62861a8fb5c6..07a08653798b 100644
> --- a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
> +++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
> @@ -18,6 +18,7 @@ Required properties:
>  - resets: Must contain an entry for each entry in reset-names.
>    See ../reset/reset.txt for details.
>  - reset-names: Must include the following entries:
> +  - mc
>    - host1x

New entries should be at the end. Order matters.

>  
>  Optional properties:
> @@ -197,6 +198,7 @@ of the following host1x client modules:
>    - resets: Must contain an entry for each entry in reset-names.
>      See ../reset/reset.txt for details.
>    - reset-names: Must include the following entries:
> +    - mc
>      - 2d
>  
>    Optional properties:
> @@ -222,6 +224,8 @@ of the following host1x client modules:
>    - resets: Must contain an entry for each entry in reset-names.
>      See ../reset/reset.txt for details.
>    - reset-names: Must include the following entries:
> +    - mc
> +    - mc2 (Only required on SoCs with two 3D clocks)
>      - 3d
>      - 3d2 (Only required on SoCs with two 3D clocks)
>  
> -- 
> 2.32.0
> 
>