linux-kernel - Re: [PATCH v4 14/15] ASoC: rockchip/rockchip-hdmi-audio: add sound driver for hdmi audio

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Date:	Thu, 26 Mar 2015 11:16:20 -0700
From:	Mark Brown <broonie@...nel.org>
To:	Yakir Yang <ykk@...k-chips.com>
Cc:	Liam Girdwood <lgirdwood@...il.com>, djkurtz@...omium.org,
	dianders@...omium.org, linux-rockchip@...ts.infradead.org,
	David Airlie <airlied@...ux.ie>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Andy Yan <andy.yan@...k-chips.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	dri-devel@...ts.freedesktop.org, Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Brian Austin <brian.austin@...rus.com>,
	Bard Liao <bardliao@...ltek.com>,
	Oder Chiou <oder_chiou@...ltek.com>,
	Max Filippov <jcmvbkbc@...il.com>,
	Axel Lin <axel.lin@...ics.com>, Arnd Bergmann <arnd@...db.de>,
	Jyri Sarha <jsarha@...com>, Sean Cross <xobs@...agi.com>,
	Ben Zhang <benzh@...omium.org>, linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org, mmind00@...glemail.com,
	marcheu@...omium.org, mark.yao@...k-chips.com
Subject: Re: [PATCH v4 14/15] ASoC: rockchip/rockchip-hdmi-audio: add sound
 driver for hdmi audio

On Sat, Feb 28, 2015 at 10:04:30PM -0500, Yakir Yang wrote:

> +	ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
> +	if (ret < 0) {
> +		dev_err(cpu_dai->dev, "failed to set cpu_dai fmt.\n");
> +		return ret;
> +	}

You've already set this in the dai_link, no need to do it again.

> +	dev_info(&pdev->dev, "hdmi audio init success.\n");

Please remove noisy prints like this.

> +free_cpu_of_node:
> +	hdmi_audio_dai.cpu_of_node = NULL;
> +	hdmi_audio_dai.platform_of_node = NULL;
> +free_priv_data:
> +	snd_soc_card_set_drvdata(card, NULL);
> +	platform_set_drvdata(pdev, NULL);
> +	card->dev = NULL;

If any of these assignments is doing anything there's a problem with the
code.

> +{
> +	struct snd_soc_card *card = platform_get_drvdata(pdev);
> +
> +	snd_soc_unregister_card(card);

devm_snd_soc_register_card() and you can remove this function entirely.

> +static const struct of_device_id rockchip_hdmi_audio_of_match[] = {
> +	{ .compatible = "rockchip,rk3288-hdmi-audio", },
> +	{},
> +};

There is no documentation for this binding, binding documentation is
mandatory.  Based on the compatible string this looks like it's specific
to the SoC rather than a design for a board - is the whole card part of
the SoC?

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