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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?tT8uBSan+CMGGBbaQlBRmBodU8ItOjjgVoKimDg20IFS5OI29pFTPB7pF9JR?= =?us-ascii?Q?a/bGj6IPEw8Ih2uosUtQ242o38wu3iHk6tVVWYVjV9q6alknzajIXshkXSww?= =?us-ascii?Q?LPNuUR5k5/jh8nE9u1nAUjNlUvzEfZXDfyAwLD1XpkYC/2FE+U56jEIkltrP?= =?us-ascii?Q?kYyPX+4MN5tXFQMCp/ZMpwn0fSdDUqBSZcb66WK1TS5ivKm76H8mkbdvZdRn?= =?us-ascii?Q?Veup3facm54lKI6jwtzFrKHUMELqH2/n0lFupqogJyyZrVm26yNH1mLnlQn6?= =?us-ascii?Q?LTXOBe5jtIg0mmo3aThQLLs3oJpI2eeTfj7J5vJPTSTjNELNKlHfB2Uzx6IJ?= =?us-ascii?Q?XtIjIz/vkM2XOdiBhdXK9DEUiL8WGKLgFLmikAb54STwcgC3Er7/0uaNkE9X?= =?us-ascii?Q?sm0DAVlEP6K1l15OUW+uiIJAtcm21EBeD+ExD288/PWr+DB/DEiTQMzaZX0q?= =?us-ascii?Q?dzKUQg90JUcaX4KvAuWCO+yzHxzDpWzNSBRIOie5ZMs9AYQtt7+1gQK2OSXh?= =?us-ascii?Q?Fjmd9agVGwNERwQeho6p8+YJEd224qG74/BNp0OHQBSAOu/DWejAvIWRLh3l?= =?us-ascii?Q?ntLhxVQ06zxgdPGcf8S0IPDt6VLNXHcZq7EW8FqEGwb9U3Onojvx4tyX395H?= =?us-ascii?Q?lEt+7XsHQ0pg+EA4Kdx5qlKkOYUh6Jvva3cge26kLG7FKQqEq0mGzhcP9bIC?= =?us-ascii?Q?yHQEKMUyr+R1bzG9oC7HwAZFK9fyEKHOQeMtiuL8YJ6aObLVker0pjRmGW1n?= =?us-ascii?Q?1HbRso0cgXfln48qoOb7LsIiGM5xodf7/3Iil+wr8I0DSX2fmnShBsIRMrQn?= =?us-ascii?Q?59jDeIzfLpmDMDsCnG/7xfEDzfnwz5aCemuaBa+VQ1Dtxqy6lh86Ru7BAeFz?= =?us-ascii?Q?NUAB/guGlqbpnV0oKBffYMOmztSTfEn9KjW9Sn+X2Da0QN8MKaJldKuYxRzl?= =?us-ascii?Q?w78ARlEBqseaRzvcy/RyvObbEPXyhvTi+XE4SpLQMNFdwXZNojPYe0tdy3Pd?= =?us-ascii?Q?XGMAZpMBSWy4LCA4GVr5T6BUcBQHGUplW5/ZmL8YLGbh34LOBIHd+Jmn4UO7?= =?us-ascii?Q?yHJP+eigk2OTMnH43QGsSxUr4vbCv0Fpb943SdUpziMEAnN0QQP+FxG1kKa7?= =?us-ascii?Q?meGpTMuU/9FBETyjiZ9Im4jxmQQQI+YgTRTjFOR1BUVDhljaQmB4vpjgFmKf?= =?us-ascii?Q?yspHOQ+rgSBxHQYO7FCHqkqGcMGfVpLHh26MHKU935cuX+4lfCOkhbtCWJLV?= =?us-ascii?Q?9UodHKAiMecF80YTnbeJ/xQ62EfqbKArduczm0LY9zxgeoJb7/arWCOukOR8?= =?us-ascii?Q?Ejg+KmbI9fJYk16c6q6jejYgdoHZdYxqqL+erXT1UiFpFAPPtZyHqXiHyjfh?= =?us-ascii?Q?NaRcMXLlWeNM+4OxroOM6ixtab8STgYDC0qQc0a/pLRcCEHDFDfU/ts0TObF?= =?us-ascii?Q?7g/6iJrK1H4eC0m0NKGXL6aERcfqmZRDwYKJTBEalzIZBk7VXz5rGZZ8gIF9?= =?us-ascii?Q?Nc8FJMZ9LmsugMhCZnttnhqgZNJLEGvKuVQa+AhJtfzOWxu4oU2uJ5Fi4HTk?= =?us-ascii?Q?AREgBepKIW35zbo2eSs/d2D1zSiJEpXbWUm57SYW?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4aaf73d0-a7c7-44ba-f37f-08dbca50004e X-MS-Exchange-CrossTenant-AuthSource: DB9PR04MB9498.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Oct 2023 11:48:35.5959 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 2F+eTIYlGmO19vSLRM+9hU57kWWgiYcrV6QLTxVHY8rkXGJWwirUnima3FY/616fko8mbw89wSmbe1cjlOhEoQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR04MB8300 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Low power audio mode requires binding codec still power on while Acore enters into suspend so Mcore can continue playback music. ASoC machine driver acquires DAPM endpoints through reading "lpa-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..2c54c92fb911 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, + "lpa-widgets"); + for (i = 0; i < num_widgets; i++) { + of_property_read_string_index(data->card.dev->of_node, + "lpa-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; -- 2.25.1