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Mon, 23 Oct 2023 02:07:46 +0000 From: Chancel Liu To: lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, shengjiu.wang@gmail.com, Xiubo.Lee@gmail.com, festevam@gmail.com, nicoleotsuka@gmail.com, perex@perex.cz, tiwai@suse.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 1/2] ASoC: dt-bindings: sound-card-common: List sound widgets ignoring system suspend Date: Mon, 23 Oct 2023 10:07:17 +0800 Message-Id: <20231023020718.1276000-1-chancel.liu@nxp.com> X-Mailer: git-send-email 2.25.1 X-ClientProxiedBy: SG2PR02CA0084.apcprd02.prod.outlook.com (2603:1096:4:90::24) To AS1PR04MB9504.eurprd04.prod.outlook.com (2603:10a6:20b:4c6::19) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS1PR04MB9504:EE_|PAWPR04MB9837:EE_ X-MS-Office365-Filtering-Correlation-Id: 2f1c6f3b-d8e6-4656-fd1e-08dbd36cd98a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Paths between these endpoints are still active over suspend of the main application processor that the current operating system is running. Signed-off-by: Chancel Liu --- .../devicetree/bindings/sound/sound-card-common.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/sound/sound-card-common.yaml b/Documentation/devicetree/bindings/sound/sound-card-common.yaml index 3a941177f684..721950f65748 100644 --- a/Documentation/devicetree/bindings/sound/sound-card-common.yaml +++ b/Documentation/devicetree/bindings/sound/sound-card-common.yaml @@ -17,6 +17,13 @@ properties: pair of strings, the first being the connection's sink, the second being the connection's source. + ignore-suspend-widgets: + $ref: /schemas/types.yaml#/definitions/non-unique-string-array + description: | + A list of audio sound widgets which are marked ignoring system suspend. + Paths between these endpoints are still active over suspend of the main + application processor that the current operating system is running. + model: $ref: /schemas/types.yaml#/definitions/string description: User specified audio sound card name From patchwork Mon Oct 23 02:07:18 2023 Content-Type: text/plain; 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Mon, 23 Oct 2023 02:07:52 +0000 From: Chancel Liu To: lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, shengjiu.wang@gmail.com, Xiubo.Lee@gmail.com, festevam@gmail.com, nicoleotsuka@gmail.com, perex@perex.cz, tiwai@suse.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 2/2] ASoC: imx-rpmsg: Force codec power on in low power audio mode Date: Mon, 23 Oct 2023 10:07:18 +0800 Message-Id: <20231023020718.1276000-2-chancel.liu@nxp.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231023020718.1276000-1-chancel.liu@nxp.com> References: <20231023020718.1276000-1-chancel.liu@nxp.com> X-ClientProxiedBy: SG2PR02CA0084.apcprd02.prod.outlook.com (2603:1096:4:90::24) To AS1PR04MB9504.eurprd04.prod.outlook.com (2603:10a6:20b:4c6::19) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS1PR04MB9504:EE_|PAWPR04MB9837:EE_ X-MS-Office365-Filtering-Correlation-Id: 2abb7609-bdcc-4778-64ee-08dbd36cdcd9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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ASoC machine driver acquires DAPM endpoints through reading "ignore-suspend-widgets" property from DT and then forces the path between these endpoints ignoring suspend. If the rpmsg sound card is in low power audio mode, the suspend/resume callback of binding codec is overridden to disable the suspend/resume. Signed-off-by: Chancel Liu --- sound/soc/fsl/imx-rpmsg.c | 58 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/sound/soc/fsl/imx-rpmsg.c b/sound/soc/fsl/imx-rpmsg.c index a9324712e3fa..e5bd63dab10c 100644 --- a/sound/soc/fsl/imx-rpmsg.c +++ b/sound/soc/fsl/imx-rpmsg.c @@ -20,8 +20,11 @@ struct imx_rpmsg { struct snd_soc_dai_link dai; struct snd_soc_card card; unsigned long sysclk; + bool lpa; }; +static struct dev_pm_ops lpa_pm; + static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = { SND_SOC_DAPM_HP("Headphone Jack", NULL), SND_SOC_DAPM_SPK("Ext Spk", NULL), @@ -38,6 +41,58 @@ static int imx_rpmsg_late_probe(struct snd_soc_card *card) struct device *dev = card->dev; int ret; + if (data->lpa) { + struct snd_soc_component *codec_comp; + struct device_node *codec_np; + struct device_driver *codec_drv; + struct device *codec_dev = NULL; + + codec_np = data->dai.codecs->of_node; + if (codec_np) { + struct platform_device *codec_pdev; + struct i2c_client *codec_i2c; + + codec_i2c = of_find_i2c_device_by_node(codec_np); + if (codec_i2c) + codec_dev = &codec_i2c->dev; + if (!codec_dev) { + codec_pdev = of_find_device_by_node(codec_np); + if (codec_pdev) + codec_dev = &codec_pdev->dev; + } + } + if (codec_dev) { + codec_comp = snd_soc_lookup_component_nolocked(codec_dev, NULL); + if (codec_comp) { + int i, num_widgets; + const char *widgets; + struct snd_soc_dapm_context *dapm; + + num_widgets = of_property_count_strings(data->card.dev->of_node, + "ignore-suspend-widgets"); + for (i = 0; i < num_widgets; i++) { + of_property_read_string_index(data->card.dev->of_node, + "ignore-suspend-widgets", + i, &widgets); + dapm = snd_soc_component_get_dapm(codec_comp); + snd_soc_dapm_ignore_suspend(dapm, widgets); + } + } + codec_drv = codec_dev->driver; + if (codec_drv->pm) { + memcpy(&lpa_pm, codec_drv->pm, sizeof(lpa_pm)); + lpa_pm.suspend = NULL; + lpa_pm.resume = NULL; + lpa_pm.freeze = NULL; + lpa_pm.thaw = NULL; + lpa_pm.poweroff = NULL; + lpa_pm.restore = NULL; + codec_drv->pm = &lpa_pm; + } + put_device(codec_dev); + } + } + if (!data->sysclk) return 0; @@ -137,6 +192,9 @@ static int imx_rpmsg_probe(struct platform_device *pdev) goto fail; } + if (of_property_read_bool(np, "fsl,enable-lpa")) + data->lpa = true; + data->card.dev = &pdev->dev; data->card.owner = THIS_MODULE; data->card.dapm_widgets = imx_rpmsg_dapm_widgets;