linux-kernel - [PATCH v1 4/4] ASoC: SOF: mediatek: Add DSP system PM callback for mt8186

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Date:   Fri, 22 Apr 2022 13:56:59 +0800
From:   Tinghan Shen <tinghan.shen@...iatek.com>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@....com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        YC Hung <yc.hung@...iatek.com>,
        Allen-KH Cheng <allen-kh.cheng@...iatek.com>,
        Tinghan Shen <tinghan.shen@...iatek.com>,
        Péter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        "Geert Uytterhoeven" <geert@...ux-m68k.org>
CC:     <linux-kernel@...r.kernel.org>,
        <sound-open-firmware@...a-project.org>,
        <alsa-devel@...a-project.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v1 4/4] ASoC: SOF: mediatek: Add DSP system PM callback for mt8186

Add DSP system PM callback for suspend and resume

Signed-off-by: Allen-KH Cheng <allen-kh.cheng@...iatek.com>
Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
Reviewed-by: Yaochun Hung <yc.hung@...iatek.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
---
 sound/soc/sof/mediatek/mt8186/mt8186.c | 28 ++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/sound/soc/sof/mediatek/mt8186/mt8186.c b/sound/soc/sof/mediatek/mt8186/mt8186.c
index a04cea77bd4d..c8faa63497c6 100644
--- a/sound/soc/sof/mediatek/mt8186/mt8186.c
+++ b/sound/soc/sof/mediatek/mt8186/mt8186.c
@@ -304,6 +304,30 @@ static int mt8186_dsp_remove(struct snd_sof_dev *sdev)
 	return 0;
 }
 
+static int mt8186_dsp_suspend(struct snd_sof_dev *sdev, u32 target_state)
+{
+	sof_hifixdsp_shutdown(sdev);
+	adsp_sram_power_off(sdev);
+	adsp_clock_off(sdev);
+
+	return 0;
+}
+
+static int mt8186_dsp_resume(struct snd_sof_dev *sdev)
+{
+	int ret;
+
+	ret = adsp_clock_on(sdev);
+	if (ret) {
+		dev_err(sdev->dev, "adsp_clock_on fail!\n");
+		return ret;
+	}
+
+	adsp_sram_power_on(sdev);
+
+	return ret;
+}
+
 /* on mt8186 there is 1 to 1 match between type and BAR idx */
 static int mt8186_get_bar_index(struct snd_sof_dev *sdev, u32 type)
 {
@@ -338,6 +362,10 @@ static struct snd_sof_dsp_ops sof_mt8186_ops = {
 	/* Firmware ops */
 	.dsp_arch_ops = &sof_xtensa_arch_ops,
 
+	/* PM */
+	.suspend	= mt8186_dsp_suspend,
+	.resume		= mt8186_dsp_resume,
+
 	/* ALSA HW info flags */
 	.hw_info =	SNDRV_PCM_INFO_MMAP |
 			SNDRV_PCM_INFO_MMAP_VALID |
-- 
2.18.0