linux-kernel - Re: [PATCH v4 3/9] drm/bridge-connector: implement glue code for HDMI connector

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Date: Mon, 3 Jun 2024 11:14:30 +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>, Rob Clark <robdclark@...il.com>, 
	Abhinav Kumar <quic_abhinavk@...cinc.com>, Sean Paul <sean@...rly.run>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org, 
	freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/9] drm/bridge-connector: implement glue code for
 HDMI connector

Hi,

On Fri, May 31, 2024 at 11:07:26PM GMT, Dmitry Baryshkov wrote:
> +static int drm_bridge_connector_clear_infoframe(struct drm_connector *connector,
> +						enum hdmi_infoframe_type type)
> +{
> +	struct drm_bridge_connector *bridge_connector =
> +		to_drm_bridge_connector(connector);
> +	struct drm_bridge *bridge;
> +
> +	bridge = bridge_connector->bridge_hdmi;
> +	if (!bridge)
> +		return -EINVAL;
> +
> +	if (bridge->funcs->hdmi_clear_infoframe)
> +		return bridge->funcs->hdmi_clear_infoframe(bridge, type);
> +	else
> +		return 0;
> +}
> +
> +static int drm_bridge_connector_write_infoframe(struct drm_connector *connector,
> +						enum hdmi_infoframe_type type,
> +						const u8 *buffer, size_t len)
> +{
> +	struct drm_bridge_connector *bridge_connector =
> +		to_drm_bridge_connector(connector);
> +	struct drm_bridge *bridge;
> +
> +	bridge = bridge_connector->bridge_hdmi;
> +	if (!bridge)
> +		return -EINVAL;
> +
> +	return bridge->funcs->hdmi_write_infoframe(bridge, type, buffer, len);
> +}


Sorry, I didn't notice it before, but I think it would be good to try to
make clear_infoframe mandatory just like write_infoframe. It wasn't
possible for the main helpers because we didn't have enough info for
some drivers, but I think we should try to make it mandatory, and be
prepared to relax it if needs be.

With that fixed:
Acked-by: Maxime Ripard <mripard@...nel.org>

Maxime

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