linux-kernel - Re: [PATCH v2 1/2] drm/bridge-connector: reset the HDMI connector state

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Message-ID: <20240625-feathered-loon-of-health-ec7e6d@houat>
Date: Tue, 25 Jun 2024 17:02:02 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: 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>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
	Daniel Vetter <daniel@...ll.ch>, Dave Stevenson <dave.stevenson@...pberrypi.com>, 
	Rob Clark <robdclark@...il.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>, 
	dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] drm/bridge-connector: reset the HDMI connector
 state

Hi,

On Sun, Jun 23, 2024 at 08:40:12AM GMT, Dmitry Baryshkov wrote:
> On HDMI connectors which use drm_bridge_connector and DRM_BRIDGE_OP_HDMI
> IGT chokes on the max_bpc property in several kms_properties tests due
> to the the drm_bridge_connector failing to reset HDMI-related
> properties.
> 
> Call __drm_atomic_helper_connector_hdmi_reset() if there is a
> the drm_bridge_connector has bridge_hdmi.
> 
> Note, the __drm_atomic_helper_connector_hdmi_reset() is moved to
> drm_atomic_state_helper.c because drm_bridge_connector.c can not depend
> on DRM_DISPLAY_HDMI_STATE_HELPER. At the same time it is impossible to
> call this function from HDMI bridges, there is is no function that
> corresponds to the drm_connector_funcs::reset().

Why can't it depend on DRM_DISPLAY_HDMI_STATE_HELPER?

Maxime

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