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authorNiklas Cassel <cassel@kernel.org>2026-09-16 15:00:32 +0200
committerNiklas Cassel <cassel@kernel.org>2026-09-16 16:18:00 +0200
commit8d836581f9b1f57ceaa2b47654754ef1260b410b (patch)
tree1dbd4d0dfb99c2e238356cbe947e5b0be3e3a571 /sound/soc/codecs/dmic.c
downloadlinux-stable-8d836581f9b1f57ceaa2b47654754ef1260b410b.tar.gz
linux-stable-8d836581f9b1f57ceaa2b47654754ef1260b410b.zip
ata: libata-scsi: fix ata_dsm_trim_pages() kernel-docgrafted
make htmldocs fails with: Documentation/driver-api/libata:604: ./drivers/ata/libata-scsi.c:2301: ERROR: Unexpected indentation. [docutils] The Return: section of ata_dsm_trim_pages() ends its first sentence with a colon and continues with an indented bullet list. reStructuredText requires a blank line before an indented block, so docutils chokes on the list. Simply adding the missing blank line does not work either: Return: is a kernel-doc "special section", which is terminated by the first blank line, so the bullet list would end up in the Description section, detached from the sentence introducing it. Spell the two bounds out as prose instead, so that the Return: section stays self-contained. Documentation-only change. Fixes: e64e6b5dc867 ("ata: libata-scsi: scale DSM TRIM payload by MAX PAGES PER DSM COMMAND") Reported-by: Thomas Huth <thuth@redhat.com> Closes: https://lore.kernel.org/linux-ide/b0a0b8e8-cc4f-4c7b-8bc5-fee0712d405a@redhat.com/ Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Link: https://lore.kernel.org/r/20260916130031.29990-2-cassel@kernel.org Signed-off-by: Niklas Cassel <cassel@kernel.org>
Diffstat (limited to 'sound/soc/codecs/dmic.c')
-rw-r--r--sound/soc/codecs/dmic.c215
1 files changed, 215 insertions, 0 deletions
diff --git a/sound/soc/codecs/dmic.c b/sound/soc/codecs/dmic.c
new file mode 100644
index 000000000..cbed11136
--- /dev/null
+++ b/sound/soc/codecs/dmic.c
@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * dmic.c -- SoC audio for Generic Digital MICs
+ *
+ * Author: Liam Girdwood <lrg@slimlogic.co.uk>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#define MAX_MODESWITCH_DELAY 70
+static int modeswitch_delay;
+module_param(modeswitch_delay, uint, 0644);
+
+static int wakeup_delay;
+module_param(wakeup_delay, uint, 0644);
+
+struct dmic {
+ struct gpio_desc *gpio_en;
+ struct regulator *vref;
+ int wakeup_delay;
+ /* Delay after DMIC mode switch */
+ int modeswitch_delay;
+};
+
+static int dmic_daiops_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct dmic *dmic = snd_soc_component_get_drvdata(component);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_STOP:
+ if (dmic->modeswitch_delay)
+ mdelay(dmic->modeswitch_delay);
+
+ break;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops dmic_dai_ops = {
+ .trigger = dmic_daiops_trigger,
+};
+
+static int dmic_aif_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event) {
+ struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+ struct dmic *dmic = snd_soc_component_get_drvdata(component);
+ int ret = 0;
+
+ switch (event) {
+ case SND_SOC_DAPM_POST_PMU:
+ if (dmic->gpio_en)
+ gpiod_set_value_cansleep(dmic->gpio_en, 1);
+
+ if (dmic->vref) {
+ ret = regulator_enable(dmic->vref);
+ if (ret)
+ return ret;
+ }
+
+ if (dmic->wakeup_delay)
+ msleep(dmic->wakeup_delay);
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ if (dmic->gpio_en)
+ gpiod_set_value_cansleep(dmic->gpio_en, 0);
+
+ if (dmic->vref)
+ ret = regulator_disable(dmic->vref);
+
+ break;
+ }
+
+ return ret;
+}
+
+static struct snd_soc_dai_driver dmic_dai = {
+ .name = "dmic-hifi",
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE
+ | SNDRV_PCM_FMTBIT_S24_LE
+ | SNDRV_PCM_FMTBIT_S16_LE
+ | SNDRV_PCM_FMTBIT_DSD_U8
+ | SNDRV_PCM_FMTBIT_DSD_U16_LE
+ | SNDRV_PCM_FMTBIT_DSD_U32_LE
+ | SNDRV_PCM_FMTBIT_DSD_U16_BE
+ | SNDRV_PCM_FMTBIT_DSD_U32_BE,
+ },
+ .ops = &dmic_dai_ops,
+};
+
+static int dmic_component_probe(struct snd_soc_component *component)
+{
+ struct dmic *dmic;
+
+ dmic = devm_kzalloc(component->dev, sizeof(*dmic), GFP_KERNEL);
+ if (!dmic)
+ return -ENOMEM;
+
+ dmic->vref = devm_regulator_get_optional(component->dev, "vref");
+ if (IS_ERR(dmic->vref)) {
+ if (PTR_ERR(dmic->vref) != -ENODEV)
+ return dev_err_probe(component->dev, PTR_ERR(dmic->vref),
+ "Failed to get vref\n");
+ dmic->vref = NULL;
+ }
+
+ dmic->gpio_en = devm_gpiod_get_optional(component->dev,
+ "dmicen", GPIOD_OUT_LOW);
+ if (IS_ERR(dmic->gpio_en))
+ return PTR_ERR(dmic->gpio_en);
+
+ device_property_read_u32(component->dev, "wakeup-delay-ms",
+ &dmic->wakeup_delay);
+ device_property_read_u32(component->dev, "modeswitch-delay-ms",
+ &dmic->modeswitch_delay);
+ if (wakeup_delay)
+ dmic->wakeup_delay = wakeup_delay;
+ if (modeswitch_delay)
+ dmic->modeswitch_delay = modeswitch_delay;
+
+ if (dmic->modeswitch_delay > MAX_MODESWITCH_DELAY)
+ dmic->modeswitch_delay = MAX_MODESWITCH_DELAY;
+
+ snd_soc_component_set_drvdata(component, dmic);
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = {
+ SND_SOC_DAPM_AIF_OUT_E("DMIC AIF", "Capture", 0,
+ SND_SOC_NOPM, 0, 0, dmic_aif_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_INPUT("DMic"),
+};
+
+static const struct snd_soc_dapm_route intercon[] = {
+ {"DMIC AIF", NULL, "DMic"},
+};
+
+static const struct snd_soc_component_driver soc_dmic = {
+ .probe = dmic_component_probe,
+ .dapm_widgets = dmic_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(dmic_dapm_widgets),
+ .dapm_routes = intercon,
+ .num_dapm_routes = ARRAY_SIZE(intercon),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+};
+
+static int dmic_dev_probe(struct platform_device *pdev)
+{
+ int err;
+ u32 chans;
+ struct snd_soc_dai_driver *dai_drv = &dmic_dai;
+
+ if (pdev->dev.of_node) {
+ err = of_property_read_u32(pdev->dev.of_node, "num-channels", &chans);
+ if (err && (err != -EINVAL))
+ return err;
+
+ if (!err) {
+ if (chans < 1 || chans > 8)
+ return -EINVAL;
+
+ dai_drv = devm_kzalloc(&pdev->dev, sizeof(*dai_drv), GFP_KERNEL);
+ if (!dai_drv)
+ return -ENOMEM;
+
+ memcpy(dai_drv, &dmic_dai, sizeof(*dai_drv));
+ dai_drv->capture.channels_max = chans;
+ }
+ }
+
+ return devm_snd_soc_register_component(&pdev->dev,
+ &soc_dmic, dai_drv, 1);
+}
+
+MODULE_ALIAS("platform:dmic-codec");
+
+static const struct of_device_id dmic_dev_match[] = {
+ {.compatible = "dmic-codec"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, dmic_dev_match);
+
+static struct platform_driver dmic_driver = {
+ .driver = {
+ .name = "dmic-codec",
+ .of_match_table = dmic_dev_match,
+ },
+ .probe = dmic_dev_probe,
+};
+
+module_platform_driver(dmic_driver);
+
+MODULE_DESCRIPTION("Generic DMIC driver");
+MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>");
+MODULE_LICENSE("GPL");