linux-kernel - Re: [alsa-devel] [PATCH v2 3/5] ASoC: core: add support to snd_soc_dai_get_sdw

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Date:   Thu, 10 Oct 2019 10:49:52 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>
Cc:     devicetree@...r.kernel.org, alsa-devel@...a-project.org,
        bgoswami@...eaurora.org, linux-kernel@...r.kernel.org,
        plai@...eaurora.org, robh+dt@...nel.org, lgirdwood@...il.com,
        Vinod Koul <vkoul@...nel.org>, Mark Brown <broonie@...nel.org>,
        spapothi@...eaurora.org
Subject: Re: [alsa-devel] [PATCH v2 3/5] ASoC: core: add support to
 snd_soc_dai_get_sdw_stream()



> I still need to figure out prefixing multiple instances of this 
> Amplifier controls with "Left" and "Right"

FWIW we use the "snd_codec_conf" stuff to add a prefix for each 
amplifier, so that the controls are not mixed up between instances of 
the same amp, see e.g.

	
static struct snd_soc_codec_conf codec_conf[] = {
	{
		.dev_name = "sdw:0:25d:711:0:1",
		.name_prefix = "rt711",
	},
	{
		.dev_name = "sdw:1:25d:1308:0:0",
		.name_prefix = "rt1308-1",
	},
	{
		.dev_name = "sdw:2:25d:1308:0:2",
		.name_prefix = "rt1308-2",
	},
	{
		.dev_name = "sdw:3:25d:715:0:1",
		.name_prefix = "rt715",
	},
};


https://github.com/thesofproject/linux/pull/1142/commits/9ff9cf9d8994333df2250641c95431261bc66d69#diff-892560f80d603420baec7395e0b45d81R212