linux-kernel - Re: [PATCH v6 03/10] drm/connector: implement generic HDMI codec helpers

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Message-ID: <20241217-heretic-hopeful-jaguar-aeabec@houat>
Date: Tue, 17 Dec 2024 08:43:10 +0100
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>, 
	Simona Vetter <simona@...ll.ch>, Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
	Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, Phong LE <ple@...libre.com>, 
	Inki Dae <inki.dae@...sung.com>, Seung-Woo Kim <sw0312.kim@...sung.com>, 
	Kyungmin Park <kyungmin.park@...sung.com>, Krzysztof Kozlowski <krzk@...nel.org>, 
	Alim Akhtar <alim.akhtar@...sung.com>, Russell King <linux@...linux.org.uk>, 
	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>, Sandy Huang <hjc@...k-chips.com>, 
	Heiko Stübner <heiko@...ech.de>, Andy Yan <andy.yan@...k-chips.com>, 
	Alain Volmat <alain.volmat@...s.st.com>, Raphael Gallais-Pou <rgallaispou@...il.com>, 
	Dave Stevenson <dave.stevenson@...pberrypi.com>, Maíra Canal <mcanal@...lia.com>, 
	Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>, Jani Nikula <jani.nikula@...ux.intel.com>, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, linux-sound@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
	linux-mediatek@...ts.infradead.org, linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v6 03/10] drm/connector: implement generic HDMI codec
 helpers

Hi,

On Mon, Dec 16, 2024 at 07:47:32PM +0200, Dmitry Baryshkov wrote:
> On Mon, Dec 16, 2024 at 06:04:41PM +0100, Maxime Ripard wrote:
> > > +struct drm_connector_hdmi_codec_funcs {
> > > +	/**
> > > +	 * @audio_startup:
> > > +	 *
> > > +	 * Called when ASoC starts an audio stream setup. The
> > > +	 * @hdmi_audio_startup is optional.
> > > +	 *
> > > +	 * Returns:
> > > +	 * 0 on success, a negative error code otherwise
> > > +	 */
> > > +	int (*audio_startup)(struct drm_connector *connector);
> > > +
> > > +	/**
> > > +	 * @prepare:
> > > +	 * Configures HDMI-encoder for audio stream. Can be called
> > > +	 * multiple times for each setup. Mandatory.
> > > +	 *
> > > +	 * Returns:
> > > +	 * 0 on success, a negative error code otherwise
> > > +	 */
> > > +	int (*prepare)(struct drm_connector *connector,
> > > +		       struct hdmi_codec_daifmt *fmt,
> > > +		       struct hdmi_codec_params *hparms);
> > 
> > Missing newline
> > 
> > > +	/**
> > > +	 * @audio_shutdown:
> > > +	 *
> > > +	 * Shut down the audio stream. Mandatory.
> > > +	 *
> > > +	 * Returns:
> > > +	 * 0 on success, a negative error code otherwise
> > > +	 */
> > > +	void (*audio_shutdown)(struct drm_connector *connector);
> > 
> > And thus we can probably just call that one shutdown?
> 
> It should be called automatically by the sound system. I'd rather not
> call items directly that we are not supposed to call.

I meant that with my suggestion to call the function
drm_connector_hdmi_audio_init, that structure would be called
drm_connector_hdmi_audio_funcs, and thus the audio prefix in
audio_shutdown is redundant.

Maxime

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