ASoC: SOF: mediatek: Add DSP system PM callback for mt8195

Add DSP system PM callback for suspend and resume

Signed-off-by: YC Hung <yc.hung@mediatek.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20211118100749.54628-9-daniel.baluta@oss.nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sof/mediatek/mt8195/mt8195.c b/sound/soc/sof/mediatek/mt8195/mt8195.c
index 5bfae9379ac8d7fd231090cb95b258311721bc65..40e5a25875a6a93c1256a4be7ffe56c3f0cf2f88 100644 (file)
--- a/sound/soc/sof/mediatek/mt8195/mt8195.c
+++ b/sound/soc/sof/mediatek/mt8195/mt8195.c
@@ -311,6 +311,44 @@ static int mt8195_dsp_remove(struct snd_sof_dev *sdev)
        return 0;
 }
 
+static int mt8195_dsp_suspend(struct snd_sof_dev *sdev, u32 target_state)
+{
+       struct platform_device *pdev = container_of(sdev->dev, struct platform_device, dev);
+       int ret;
+
+       /* stall and reset dsp */
+       sof_hifixdsp_shutdown(sdev);
+
+       /* power down adsp sram */
+       ret = adsp_sram_power_on(&pdev->dev, false);
+       if (ret) {
+               dev_err(sdev->dev, "adsp_sram_power_off fail!\n");
+               return ret;
+       }
+
+       /* turn off adsp clock */
+       return adsp_clock_off(sdev);
+}
+
+static int mt8195_dsp_resume(struct snd_sof_dev *sdev)
+{
+       int ret;
+
+       /* turn on adsp clock */
+       ret = adsp_clock_on(sdev);
+       if (ret) {
+               dev_err(sdev->dev, "adsp_clock_on fail!\n");
+               return ret;
+       }
+
+       /* power on adsp sram */
+       ret = adsp_sram_power_on(sdev->dev, true);
+       if (ret)
+               dev_err(sdev->dev, "adsp_sram_power_on fail!\n");
+
+       return ret;
+}
+
 /* on mt8195 there is 1 to 1 match between type and BAR idx */
 static int mt8195_get_bar_index(struct snd_sof_dev *sdev, u32 type)
 {
@@ -382,6 +420,10 @@ const struct snd_sof_dsp_ops sof_mt8195_ops = {
        .drv = mt8195_dai,
        .num_drv = ARRAY_SIZE(mt8195_dai),
 
+       /* PM */
+       .suspend        = mt8195_dsp_suspend,
+       .resume         = mt8195_dsp_resume,
+
        /* ALSA HW info flags */
        .hw_info =      SNDRV_PCM_INFO_MMAP |
                        SNDRV_PCM_INFO_MMAP_VALID |