linux-kernel - Re: [PATCH v2 0/2] drm/bridge: tc358767: Fix DRM_BRIDGE_ATTACH_NO

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Date:   Wed, 08 Nov 2023 13:45:20 +0100
From:   Alexander Stein <alexander.stein@...tq-group.com>
To:     Aradhya Bhatia <a-bhatia1@...com>,
        Jan Kiszka <jan.kiszka@...mens.com>,
        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>,
        Daniel Vetter <daniel@...ll.ch>,
        Sam Ravnborg <sam@...nborg.org>,
        dri-devel@...ts.freedesktop.org
Cc:     Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: Re: [PATCH v2 0/2] drm/bridge: tc358767: Fix DRM_BRIDGE_ATTACH_NO_CONNECTOR case

Hi Tomi,

Am Mittwoch, 8. November 2023, 12:27:21 CET schrieb Tomi Valkeinen:
> These two patches are needed to make tc358767 work in the
> DRM_BRIDGE_ATTACH_NO_CONNECTOR case, at least when using a DP connector.
> 
> I have tested this with TI AM654 EVM with a tc358767 add-on card
> connected to a DP monitor.

Just a question regarding the usage of this DSI-DP bridge.
What is the state of the DSI lanes after the DSI host has been initialized, 
but before calling atomic_pre_enable? AFAIK this bridge requires LP-11 on DSI 
at any time for accessing the AUX channel.

Best regards,
Alexander

> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> ---
> Changes in v2:
> - Update the format negotiation patch as discussed in
> https://lore.kernel.org/all/7ddf0edb-2925-4b7c-ad07-27c030dd0232@ti.com/ -
> Link to v1:
> https://lore.kernel.org/r/20231031-tc358767-v1-0-392081ad9f4b@ideasonboard.
> com
> 
> ---
> Aradhya Bhatia (1):
>       drm/bridge: tc358767: Add format negotiation hooks for DPI/DSI to
> (e)DP
> 
> Tomi Valkeinen (1):
>       drm/bridge: tc358767: Fix link properties discovery
> 
>  drivers/gpu/drm/bridge/tc358767.c | 32 ++++++++++++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
> ---
> base-commit: 9d7c8c066916f231ca0ed4e4fce6c4b58ca3e451
> change-id: 20231031-tc358767-58e3ebdf95f0
> 
> Best regards,


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