Re: [PATCH 4/8] ASoC: sun50i-codec-analog: Make headphone routes stereo

From: Chen-Yu Tsai
Date: Sun Feb 16 2020 - 22:48:28 EST


Hi,

On Mon, Feb 17, 2020 at 10:18 AM Samuel Holland <samuel@xxxxxxxxxxxx> wrote:
>
> This matches the hardware more accurately, and is necessary for
> including the (stereo) headphone mute switch in the DAPM graph.
>
> Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx>
> ---
> sound/soc/sunxi/sun50i-codec-analog.c | 28 +++++++++++++++++++--------
> 1 file changed, 20 insertions(+), 8 deletions(-)
>
> diff --git a/sound/soc/sunxi/sun50i-codec-analog.c b/sound/soc/sunxi/sun50i-codec-analog.c
> index 17165f1ddb63..f98851067f97 100644
> --- a/sound/soc/sunxi/sun50i-codec-analog.c
> +++ b/sound/soc/sunxi/sun50i-codec-analog.c
> @@ -311,9 +311,15 @@ static const struct snd_soc_dapm_widget sun50i_a64_codec_widgets[] = {
> */
>
> SND_SOC_DAPM_REGULATOR_SUPPLY("cpvdd", 0, 0),
> - SND_SOC_DAPM_MUX("Headphone Source Playback Route",
> + SND_SOC_DAPM_MUX("Left Headphone Source",
> SND_SOC_NOPM, 0, 0, sun50i_codec_hp_src),
> - SND_SOC_DAPM_OUT_DRV("Headphone Amp", SUN50I_ADDA_HP_CTRL,
> + SND_SOC_DAPM_MUX("Right Headphone Source",

Please don't remove the widget suffix. The suffix was chosen to work with
alsa-lib's control parsing code. The term "Playback Route" is appropriate
because it is playback only, and it is a routing switch, not a source or
sink.

Also, what's wrong with just having a single "stereo" widget instead of
two "mono" widgets? I added stereo (2-channel) support to DAPM quite
some time ago. You just have to have two routes in and out.

ChenYu

> + SND_SOC_NOPM, 0, 0, sun50i_codec_hp_src),
> + SND_SOC_DAPM_OUT_DRV("Left Headphone Amp",
> + SND_SOC_NOPM, 0, 0, NULL, 0),
> + SND_SOC_DAPM_OUT_DRV("Right Headphone Amp",
> + SND_SOC_NOPM, 0, 0, NULL, 0),
> + SND_SOC_DAPM_SUPPLY("Headphone Amp", SUN50I_ADDA_HP_CTRL,
> SUN50I_ADDA_HP_CTRL_HPPA_EN, 0, NULL, 0),
> SND_SOC_DAPM_OUTPUT("HP"),
>
> @@ -405,13 +411,19 @@ static const struct snd_soc_dapm_route sun50i_a64_codec_routes[] = {
> { "Right ADC", NULL, "Right ADC Mixer" },
>
> /* Headphone Routes */
> - { "Headphone Source Playback Route", "DAC", "Left DAC" },
> - { "Headphone Source Playback Route", "DAC", "Right DAC" },
> - { "Headphone Source Playback Route", "Mixer", "Left Mixer" },
> - { "Headphone Source Playback Route", "Mixer", "Right Mixer" },
> - { "Headphone Amp", NULL, "Headphone Source Playback Route" },
> + { "Left Headphone Source", "DAC", "Left DAC" },
> + { "Left Headphone Source", "Mixer", "Left Mixer" },
> + { "Left Headphone Amp", NULL, "Left Headphone Source" },
> + { "Left Headphone Amp", NULL, "Headphone Amp" },
> + { "HP", NULL, "Left Headphone Amp" },
> +
> + { "Right Headphone Source", "DAC", "Right DAC" },
> + { "Right Headphone Source", "Mixer", "Right Mixer" },
> + { "Right Headphone Amp", NULL, "Right Headphone Source" },
> + { "Right Headphone Amp", NULL, "Headphone Amp" },
> + { "HP", NULL, "Right Headphone Amp" },
> +
> { "Headphone Amp", NULL, "cpvdd" },
> - { "HP", NULL, "Headphone Amp" },
>
> /* Microphone Routes */
> { "Mic1 Amplifier", NULL, "MIC1"},
> --
> 2.24.1
>