linux-kernel - Re: [PATCH] drm/sun4i: dw-hdmi: Fix ddc-en GPIO consumer conflict

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Message-Id: <165536598378.1275350.12830917316957790338.b4-ty@cerno.tech>
Date:   Thu, 16 Jun 2022 09:53:05 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Samuel Holland <samuel@...lland.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>
Cc:     Maxime Ripard <maxime@...no.tech>, linux-sunxi@...ts.linux.dev,
        Paul Cercueil <paul@...pouillou.net>,
        Neil Armstrong <narmstrong@...libre.com>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org,
        Daniel Vetter <daniel@...ll.ch>,
        "H. Nikolaus Schaller" <hns@...delico.com>
Subject: Re: [PATCH] drm/sun4i: dw-hdmi: Fix ddc-en GPIO consumer conflict

On Tue, 14 Jun 2022 02:31:00 -0500, Samuel Holland wrote:
> commit 6de79dd3a920 ("drm/bridge: display-connector: add ddc-en gpio
> support") added a consumer for this GPIO in the HDMI connector device.
> This new consumer conflicts with the pre-existing GPIO consumer in the
> sun8i HDMI controller driver, which prevents the driver from probing:
> 
>   [    4.983358] display-connector connector: GPIO lookup for consumer ddc-en
>   [    4.983364] display-connector connector: using device tree for GPIO lookup
>   [    4.983392] gpio-226 (ddc-en): gpiod_request: status -16
>   [    4.983399] sun8i-dw-hdmi 6000000.hdmi: Couldn't get ddc-en gpio
>   [    4.983618] sun4i-drm display-engine: failed to bind 6000000.hdmi (ops sun8i_dw_hdmi_ops [sun8i_drm_hdmi]): -16
>   [    4.984082] sun4i-drm display-engine: Couldn't bind all pipelines components
>   [    4.984171] sun4i-drm display-engine: adev bind failed: -16
>   [    4.984179] sun8i-dw-hdmi: probe of 6000000.hdmi failed with error -16
> 
> [...]

Applied to drm/drm-misc (drm-misc-fixes).

Thanks!
Maxime