linux-kernel - Re: [PATCH] drm/panfrost: Ensure GPU quirks are always initialised

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Date:   Thu, 10 Sep 2020 14:42:34 +0100
From:   Steven Price <steven.price@....com>
To:     Daniel Vetter <daniel@...ll.ch>, David Airlie <airlied@...ux.ie>,
        Rob Herring <robh@...nel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        "Marty E. Plummer" <hanetzer@...rtmail.com>
Subject: Re: [PATCH] drm/panfrost: Ensure GPU quirks are always initialised

On 09/09/2020 13:29, Steven Price wrote:
> The GPU 'CONFIG' registers used to work around hardware issues are
> cleared on reset so need to be programmed every time the GPU is reset.
> However panfrost_device_reset() failed to do this.
> 
> To avoid this in future instead move the call to
> panfrost_gpu_init_quirks() to panfrost_gpu_power_on() so that the
> regsiters are always programmed just before the cores are powered.
> 
> Fixes: f3ba91228e8e ("drm/panfrost: Add initial panfrost driver")
> Signed-off-by: Steven Price <steven.price@....com>

Applied to drm-misc-next

Steve