ALSA: HDA: Enable clocks during SC7 if already runtime suspended

During SC7, if device is already runtime suspended, then executing
azx_enter_link_reset in hda_tegra_suspend, which access registers,
will cause hard hang because clocks are already off. So, in this case
clocks should be enabled so that executing azx_enter_link_reset works
fine.

Bug 200178787

Change-Id: I625f5750f12f24226e3586f26a6bd1f23082a06e
Signed-off-by: Sumit Singh <sumsingh@nvidia.com>
Reviewed-on: http://git-master/r/1026435
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: Bharat Nihalani <bnihalani@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index 22f917889..95d818fec 100644
--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -301,6 +301,9 @@ static int hda_tegra_suspend(struct device *dev)
         struct azx *chip = card->private_data;
         struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
 
+        if (pm_runtime_suspended(dev))
+                hda_tegra_enable_clocks(hda);
+
         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 
         azx_stop_chip(chip);