linux-kernel - Re: [PATCH v3] drm/bridge-connector: handle subconnector types

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Message-ID: <k5ziaxb3jgqfxd3wadi4irk6kbtawudzkkatcmr635gidw6tf5@i62xyzbv2gyx>
Date: Sun, 9 Feb 2025 14:43:04 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: 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>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Rob Clark <robdclark@...il.com>, 
	Abhinav Kumar <quic_abhinavk@...cinc.com>, Sean Paul <sean@...rly.run>, 
	Marijn Suijten <marijn.suijten@...ainline.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org
Subject: Re: [PATCH v3] drm/bridge-connector: handle subconnector types

On Fri, Jan 17, 2025 at 11:50:50AM +0200, Dmitry Baryshkov wrote:
> If the created connector type supports subconnector type property,
> create and attach corresponding it. The default subtype value is 0,
> which maps to the DRM_MODE_SUBCONNECTOR_Unknown type. Also remove
> subconnector creation from the msm_dp driver to prevent having duplicate
> properties on the DP connectors.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> ---
> This is a leftover of my previous attempt to implement USB-C DisplayPort
> uABI. The idea was dropped, but I consider this part still to be useful,
> as it allows one to register corresponding subconnector properties and
> also to export the subconnector type.
> ---
> Changes in v3:
> - Rebased on top of linux-next
> - Drop subconnector property from msm_dp driver
> - Link to v2: https://lore.kernel.org/r/20230903214934.2877259-1-dmitry.baryshkov@linaro.org
> 
> Changes in v2:
> - Dropped all DP and USB-related patches
> - Dropped the patch adding default subtype to
>   drm_connector_attach_dp_subconnector_property()
> - Replaced creation of TV subconnector property with the check that it
>   was created beforehand (Neil, Laurent)
> - Link to v1: https://lore.kernel.org/r/20230729004913.215872-1-dmitry.baryshkov@linaro.org/
> ---
>  drivers/gpu/drm/display/drm_bridge_connector.c | 28 +++++++++++++++++++++++++-
>  drivers/gpu/drm/msm/dp/dp_drm.c                |  3 ---
>  include/drm/drm_bridge.h                       |  4 ++++
>  3 files changed, 31 insertions(+), 4 deletions(-)

It seems this isn't getting any response. Also we don't have (and don't
expect) DVI-I and TV bridges. Let me merge DP part to [1] and drop other
parts.

https://lore.kernel.org/linux-arm-msm/20250206-dp-hdmi-audio-v1-0-8aa14a8c0d4d@linaro.org

-- 
With best wishes
Dmitry