linux-kernel - Re: [PATCH v4 05/10] drm/bridge: refactor HDMI InfoFrame callbacks

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Message-ID: <6p52srrxddazxiwqfqmjpef7k4bbpzojxqiy57zmhqcpqa2bum@gv555pvqrige>
Date: Tue, 27 Jan 2026 22:26:56 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Mark Brown <broonie@...nel.org>
Cc: 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>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Maíra Canal <mcanal@...lia.com>,
        Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>,
        Chen-Yu Tsai <wens@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        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>, Liu Ying <victor.liu@....com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        Andy Yan <andy.yan@...k-chips.com>, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-mediatek@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org, Aishwarya.TCV@....com
Subject: Re: [PATCH v4 05/10] drm/bridge: refactor HDMI InfoFrame callbacks

On Tue, Jan 27, 2026 at 07:50:25PM +0000, Mark Brown wrote:
> On Wed, Jan 07, 2026 at 08:15:02PM +0200, Dmitry Baryshkov wrote:
> > Having only a single set of callbacks, hdmi_clear_infoframe and
> > hdmi_write_infoframe, bridge drivers don't have an easy way to signal to
> > the DRM framework, which InfoFrames are actually supported by the
> > hardware and by the driver and which are not. Also, it makes it
> 
> We're seeing oopses on Qualcomm RB5 platforms in -next which bisect to
> this patch.  Looking at the patch I'm not immediately seeing what it
> might be getting wrong, though I do note that the board uses a LT9611

LT9611UXC, yes. Fixed with [1], fix committed to drm-misc-next-fixes.

[1] https://lore.kernel.org/dri-devel/176945413960.1492466.3261759749688865592.b4-ty@oss.qualcomm.com/T/#t

> which is updated by the patch.
> 

-- 
With best wishes
Dmitry