linux-kernel - Re: [PATCH v2 1/3] ASoC: hdmi-codec: Add event handler for hdmi TX

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Message-ID: <Y43e+EsNCrCpZSIH@sirena.org.uk>
Date:   Mon, 5 Dec 2022 12:07:20 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Jiaxin Yu (俞家鑫) <Jiaxin.Yu@...iatek.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
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        Chunxu Li (李春旭) <Chunxu.Li@...iatek.com>,
        Allen-KH Cheng (程冠勳) 
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Subject: Re: [PATCH v2 1/3] ASoC: hdmi-codec: Add event handler for hdmi TX

On Mon, Dec 05, 2022 at 09:34:17AM +0000, Jiaxin Yu (俞家鑫) wrote:

> 1. I have added a DAPM widget that is "SDB", when we open or close HDMI
> PIN_SWITCH, the callback 'hdmi_tx_event' registered in the widget will
> be triggered. Maybe you mean I shouldn't use SNDRV_PCM_TRIGGER_START
> and SNDRV_PCM_TRIGGER_STOP?

No, I mean that if you want to control the enable and disable of the
output path you should implement a DAPM widget.

> 2. If I don't use hcd.ops->trigger notifies the bridge ic driver to
> switch the audio, which ops should I use?
> I actually want to know hdmi-codec.c and it6505.c except
> hdmi_codec_ops, is there any other way to communicate?

Like I said you should use the event on the DAPM widget.  This will
require providing operations for the events to the drivers.

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