[alsa-devel] [PATCH] ASoC: Intel: set initial runtime PM status to active for ACPI-enumerated ADSP

[mengdong.lin at intel.com]

From: Mengdong Lin <mengdong.lin at intel.com>

The ADSP on Braswell/Baytrail is an ACPI device. This patch sets its initial
runtime PM status to active. Otherwise, its initial status is suspended and
runtime_suspend ops will not be called after probe and thus cannot further
trigger ACPI _PS3 (D3) method to put the device into low power D3cold state.

Signed-off-by: Mengdong Lin <mengdong.lin at intel.com>

diff --git a/sound/soc/intel/sst/sst.c b/sound/soc/intel/sst/sst.c
index 8a8d56a..d6ea800 100644
--- a/sound/soc/intel/sst/sst.c
+++ b/sound/soc/intel/sst/sst.c
@@ -379,6 +379,10 @@ void sst_configure_runtime_pm(struct intel_sst_drv *ctx)
 	 * initially active. So change the state to active before
 	 * enabling the pm
 	 */
+
+	if (!acpi_disabled)
+		pm_runtime_set_active(ctx->dev);
+
 	pm_runtime_enable(ctx->dev);
 
 	if (acpi_disabled)
-- 
1.9.1