linux-kernel - Re: [PATCH RESEND 0/2] drm/bridge: lontium-lt9611uxc: switch to DRM_BRIDGE_OP_HDMI

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Message-ID: <3n5gjebxuafxgsl7yl6ife76cnfwblsggsp2kkcrbjjansbvi7@smi7zeexy5gy>
Date: Tue, 16 Sep 2025 20:37:45 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
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>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.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>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org
Subject: Re: [PATCH RESEND 0/2] drm/bridge: lontium-lt9611uxc: switch to
 DRM_BRIDGE_OP_HDMI_AUDIO

On Sun, Aug 03, 2025 at 02:53:50PM +0300, Dmitry Baryshkov wrote:
> Use DRM HDMI audio helpers in order to implement HDMI audio support for
> Lontium LT9611UXC bridge.

It's been waiting a while, it got posted as a part of another series,
but I think I'd like to apply this by the end of the week if nobody
objects.

A note regarding OP_HDMI vs OP_HDMI_AUDIO: there is really no point in
going through the OP_HDMI other than bridging the HPD even to the HDMI
audio through the framework code. The bridge driver doesn't implement
atomic_check (on purpose), the mode_valid() check is also performed
against a fixed table of modes handled by the firmware.

> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---
> Dmitry Baryshkov (2):
>       drm/bridge: add connector argument to .hpd_notify callback
>       drm/bridge: lontium-lt9611uxc: switch to HDMI audio helpers
> 
>  drivers/gpu/drm/bridge/lontium-lt9611uxc.c     | 125 ++++++++++---------------
>  drivers/gpu/drm/display/drm_bridge_connector.c |   2 +-
>  drivers/gpu/drm/meson/meson_encoder_hdmi.c     |   1 +
>  drivers/gpu/drm/msm/dp/dp_display.c            |   3 +-
>  drivers/gpu/drm/msm/dp/dp_drm.h                |   3 +-
>  drivers/gpu/drm/omapdrm/dss/hdmi4.c            |   1 +
>  include/drm/drm_bridge.h                       |   1 +
>  7 files changed, 57 insertions(+), 79 deletions(-)
> ---
> base-commit: 024e09e444bd2b06aee9d1f3fe7b313c7a2df1bb
> change-id: 20250718-lt9611uxc-hdmi-3dd96306cdff
> 
> Best regards,
> -- 
> With best wishes
> Dmitry
> 

-- 
With best wishes
Dmitry