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Message-ID: <20250901-precious-observant-kiwi-cc5283@houat>
Date: Mon, 1 Sep 2025 09:03:30 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
Simona Vetter <simona@...ll.ch>, Sandy Huang <hjc@...k-chips.com>,
Heiko Stübner <heiko@...ech.de>, Andy Yan <andy.yan@...k-chips.com>, Chen-Yu Tsai <wens@...e.org>,
Samuel Holland <samuel@...lland.org>, Dave Stevenson <dave.stevenson@...pberrypi.com>,
Maíra Canal <mcanal@...lia.com>, Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>,
Liu Ying <victor.liu@....com>, Rob Clark <robin.clark@....qualcomm.com>,
Dmitry Baryshkov <lumag@...nel.org>, Abhinav Kumar <abhinav.kumar@...ux.dev>,
Jessica Zhang <jessica.zhang@....qualcomm.com>, Sean Paul <sean@...rly.run>,
Marijn Suijten <marijn.suijten@...ainline.org>, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org
Subject: Re: [PATCH v3 01/11] drm/connector: let drivers declare infoframes
as unsupported
On Sat, Aug 30, 2025 at 03:22:57AM +0300, Dmitry Baryshkov wrote:
> Currently DRM framework expects that the HDMI connector driver supports
> all infoframe types: it generates the data as required and calls into
> the driver to program all of them, letting the driver to soft-fail if
> the infoframe is unsupported. This has a major drawback on userspace
> API: the framework also registers debugfs files for all Infoframe types,
> possibly surprising the users when infoframe is visible in the debugfs
> file, but it is not visible on the wire.
>
> Let drivers declare that they support only a subset of infoframes,
> creating a more consistent interface.
>
> Acked-by: Liu Ying <victor.liu@....com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
I still don't think it's a good idea on principle, see my answer to your v2.
Maxime
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