linux-kernel - Re: [PATCH 1/4] drm: Add I2C connector type

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Message-ID: <4322f58b-dbeb-b90f-2770-d6881f8005b4@redhat.com>
Date:   Tue, 1 Feb 2022 14:06:07 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Noralf Trønnes <noralf@...nnes.org>,
        Sam Ravnborg <sam@...nborg.org>
Cc:     linux-fbdev@...r.kernel.org, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Emil Velikov <emil.l.velikov@...il.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Maxime Ripard <maxime@...no.tech>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH 1/4] drm: Add I2C connector type

Hello Noralf,

On 2/1/22 13:58, Noralf Trønnes wrote:
> 
> 
> Den 31.01.2022 21.52, skrev Sam Ravnborg:
>> On Mon, Jan 31, 2022 at 09:12:21PM +0100, Javier Martinez Canillas wrote:
>>> There isn't a connector type for display controllers accesed through I2C,
>>> most drivers use DRM_MODE_CONNECTOR_Unknown or DRM_MODE_CONNECTOR_VIRTUAL.
>>>
>>> Add an I2C connector type to match the actual connector.
>>>
>>> As Noralf Trønnes mentions in commit fc06bf1d76d6 ("drm: Add SPI connector
>>> type"), user-space should be able to cope with a connector type that does
>>> not yet understand.
>>>
> 
> It turned out that I wasn't entirely correct here, mpv didn't cope with
> unknown types. In the PR to add support Emil Velikov wondered if libdrm
> should handle these connector names:
> https://github.com/mpv-player/mpv/pull/8989#issuecomment-879187711
> 

I see, thanks for the information. What should we do then, just use the type
DRM_MODE_CONNECTOR_Unknown then ?

Best regards,
-- 
Javier Martinez Canillas
Linux Engineering
Red Hat