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

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Date: Thu, 15 Feb 2024 10:03:41 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Aradhya Bhatia <a-bhatia1@...com>, Tomi Valkeinen <tomi.valkeinen@...asonboard.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, marex@...x.de, Jan Kiszka <jan.kiszka@...mens.com>
Cc: linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] drm/bridge: tc358767: Fix DRM_BRIDGE_ATTACH_NO_CONNECTOR case

Hi everyone,

Am Donnerstag, 15. Februar 2024, 09:53:54 CET schrieb Jan Kiszka:
> On 11.12.23 09:07, Aradhya Bhatia wrote:
> > On 06/12/23 17:41, Tomi Valkeinen wrote:
> >> Hi,
> >> 
> >> On 08/11/2023 14:45, Alexander Stein wrote:
> >>> 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.
> > 
> > + Marek
> > 
> > Marek, Alexander,
> > 
> > A quick grep tells me that you have added devicetree for tc358767 in DSI
> > to (e)DP mode on other platforms. Could you please test these patches
> > and report if you find any issue?

Sorry, I can't provide any feedback here. I've yet to setup the DSI-DP 
correctly.

Best regards,
Alexander

> Is this the last blocker to move forward with these fixes? I'd really
> like to see them finally merged.
> 
> Thanks,
> Jan


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