The patch

ASoC: audio-graph-card: add widgets and routing for external amplifier support

has been applied to the asoc tree at

git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks, Mark

From f986907c9225cf48e9a55233b086039152bb5b99 Mon Sep 17 00:00:00 2001

From: Shawn Guo shawn.guo@linaro.org Date: Thu, 29 Jun 2017 21:26:38 +0800 Subject: [PATCH] ASoC: audio-graph-card: add widgets and routing for external amplifier support

It's very common that audio card has a machine level amplifier which is controlled by GPIO. The patch adds DAPM widgets and routing support into audio-graph-card driver, and creates an output driver widget with event to control the amplifier via GPIO.

Signed-off-by: Shawn Guo shawn.guo@linaro.org Acked-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/generic/audio-graph-card.c | 48 +++++++++++++++++++++++++++++++++++- 1 file changed, 47 insertions(+), 1 deletion(-)

diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c index ee752f62d89d..105ec3a6e30d 100644 --- a/sound/soc/generic/audio-graph-card.c +++ b/sound/soc/generic/audio-graph-card.c @@ -13,6 +13,7 @@ #include <linux/clk.h> #include <linux/device.h> #include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> @@ -30,6 +31,34 @@ struct graph_card_data { struct asoc_simple_dai codec_dai; } *dai_props; struct snd_soc_dai_link *dai_link; + struct gpio_desc *pa_gpio; +}; + +static int asoc_graph_card_outdrv_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, + int event) +{ + struct snd_soc_dapm_context *dapm = w->dapm; + struct graph_card_data *priv = snd_soc_card_get_drvdata(dapm->card); + + switch (event) { + case SND_SOC_DAPM_POST_PMU: + gpiod_set_value_cansleep(priv->pa_gpio, 1); + break; + case SND_SOC_DAPM_PRE_PMD: + gpiod_set_value_cansleep(priv->pa_gpio, 0); + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct snd_soc_dapm_widget asoc_graph_card_dapm_widgets[] = { + SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM, + 0, 0, NULL, 0, asoc_graph_card_outdrv_event, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), };

#define graph_priv_to_card(priv) (&(priv)->snd_card) @@ -180,8 +209,16 @@ static int asoc_graph_card_parse_of(struct graph_card_data *priv) int rc, idx = 0; int ret;

+ ret = asoc_simple_card_of_parse_widgets(card, NULL); + if (ret < 0) + return ret; + + ret = asoc_simple_card_of_parse_routing(card, NULL, 1); + if (ret < 0) + return ret; + /* - * we need to consider "widgets", "routing", "mclk-fs" around here + * we need to consider "mclk-fs" around here * see simple-card */

@@ -233,6 +270,13 @@ static int asoc_graph_card_probe(struct platform_device *pdev) if (!dai_props || !dai_link) return -ENOMEM;

+ priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW); + if (IS_ERR(priv->pa_gpio)) { + ret = PTR_ERR(priv->pa_gpio); + dev_err(dev, "failed to get amplifier gpio: %d\n", ret); + return ret; + } + priv->dai_props = dai_props; priv->dai_link = dai_link;

@@ -242,6 +286,8 @@ static int asoc_graph_card_probe(struct platform_device *pdev) card->dev = dev; card->dai_link = dai_link; card->num_links = num; + card->dapm_widgets = asoc_graph_card_dapm_widgets; + card->num_dapm_widgets = ARRAY_SIZE(asoc_graph_card_dapm_widgets);

ret = asoc_graph_card_parse_of(priv); if (ret < 0) {