[PATCH 2/8] ASoC: SOF: pm: handle resume on legacy Intel platforms

[Pierre-Louis Bossart]

From: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>

Add new case when set_power_state() is not supported, e.g. for Intel
Baytrail/Cherrytrail legacy platforms.

Tested-by: Enric Balletbo i Serra <enric.balletbo at collabora.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 sound/soc/sof/pm.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sof/pm.c b/sound/soc/sof/pm.c
index 5e804a7728f5..92e5f9b15f3a 100644
--- a/sound/soc/sof/pm.c
+++ b/sound/soc/sof/pm.c
@@ -114,8 +114,12 @@ static int sof_resume(struct device *dev, bool runtime_resume)
 		return ret;
 	}
 
-	/* Nothing further to do if resuming from a low-power D0 substate */
-	if (!runtime_resume && old_state == SOF_DSP_PM_D0)
+	/*
+	 * Nothing further to be done for platforms that support the low power
+	 * D0 substate.
+	 */
+	if (!runtime_resume && sof_ops(sdev)->set_power_state &&
+	    old_state == SOF_DSP_PM_D0)
 		return 0;
 
 	sdev->fw_state = SOF_FW_BOOT_PREPARE;
-- 
2.20.1