linux-kernel - Re: [PATCH v3 3/3] drm/tiny: ili9486: remove conflicting framebuffers

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Message-ID: <27f14969-d71b-63db-7770-5269bf7b9ef1@redhat.com>
Date:   Tue, 6 Dec 2022 15:14:22 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>, neil.armstrong@...aro.org,
        Carlo Caione <ccaione@...libre.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Jerome Brunet <jbrunet@...libre.com>,
        David Airlie <airlied@...il.com>,
        Kamlesh Gurudasani <kamlesh.gurudasani@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Kevin Hilman <khilman@...libre.com>
Cc:     linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] drm/tiny: ili9486: remove conflicting framebuffers

On 12/6/22 10:52, Thomas Zimmermann wrote:
> Hi
> 
> Am 06.12.22 um 10:41 schrieb Neil Armstrong:
>> Hi Carlo,
>>
>> On 06/12/2022 09:34, Carlo Caione wrote:
>>> For platforms using simplefb / efifb, call
>>> drm_aperture_remove_framebuffers() to remove the conflicting
>>> framebuffer.
>>
>> Conflicting framebuffer on the SPI display ? How is that possible ?
> 
> Calling drm_aperture_remove_framebuffers() is only required if the 
> graphics card may have been pre-initialized by the system, such as a 
> VGA-compatible card on a PC.
> 
> Could the SPI display have been initialized by the firmware? If not, the 
> call should be left out.
>

Agree.

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat