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- To: Herve Codina <herve.codina@xxxxxxxxxxx>, Liam Girdwood <lgirdwood@xxxxxxxxx>, Mark Brown <broonie@xxxxxxxxxx>, Rob Herring <robh+dt@xxxxxxxxxx>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>, Jonathan Cameron <jic23@xxxxxxxxxx>, Lars-Peter Clausen <lars@xxxxxxxxxx>, Jaroslav Kysela <perex@xxxxxxxx>, Takashi Iwai <tiwai@xxxxxxxx>
- Subject: [PATCH 3/4] ASoC: soc-dapm.h: Add a helper to build a DAPM widget dynamically
- From: Herve Codina <herve.codina@xxxxxxxxxxx>
- Date: Fri, 21 Apr 2023 14:41:21 +0200
- Cc: alsa-devel@xxxxxxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-iio@xxxxxxxxxxxxxxx, Christophe Leroy <christophe.leroy@xxxxxxxxxx>, Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxx>
- In-reply-to: <20230421124122.324820-1-herve.codina@bootlin.com>
- References: <20230421124122.324820-1-herve.codina@bootlin.com>
The SND_SOC_DAPM_* helpers family are used to build widgets array in a static way. Introduce SND_SOC_DAPM_WIDGET() in order to use the SND_SOC_DAPM_* helpers family in a dynamic way. The different SND_SOC_DAPM_* parameters can be computed by the code and the widget can be built based on this parameter computation. For instance: static int create_widget(char *input_name) { struct snd_soc_dapm_widget widget; char name*; ... name = input_name; if (!name) name = "default"; widget = SND_SOC_DAPM_WIDGET(SND_SOC_DAPM_INPUT(name)); ... } Signed-off-by: Herve Codina <herve.codina@xxxxxxxxxxx> --- include/sound/soc-dapm.h | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index 64915ebd641e..d6bb97fba8c9 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -276,7 +276,17 @@ struct soc_enum; .reg = SND_SOC_NOPM, .event = dapm_pinctrl_event, \ .event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD } - +/* + * Helper to create a widget 'dynamically' + * This can be used with any of the SND_SOC_DAPM_* widget helper. + * For instance: + * struct snd_soc_dapm_widget widget; + * ... + * widget = SND_SOC_DAPM_WIDGET(SND_SOC_DAPM_INPUT(input_name)); + */ +#define SND_SOC_DAPM_WIDGET(_widget)({ \ + struct snd_soc_dapm_widget _w[1] = { _widget }; \ + _w[0]; }) /* dapm kcontrol types */ #define SOC_DAPM_DOUBLE(xname, reg, lshift, rshift, max, invert) \ -- 2.39.2
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