ASoC: hdac_hdmi: Fix to wait for D3 before powering off codec

Powering off codec immediately after sending D3 verb may not set
the node to D3 state. So wait for a confirmation response before
shutting down codec.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index 2445b43..aa953a5 100644 (file)
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -1486,6 +1486,7 @@ static int hdac_hdmi_runtime_suspend(struct device *dev)
        struct hdac_ext_device *edev = to_hda_ext_device(dev);
        struct hdac_device *hdac = &edev->hdac;
        struct hdac_bus *bus = hdac->bus;
+       unsigned long timeout;
        int err;
 
        dev_dbg(dev, "Enter: %s\n", __func__);
@@ -1495,10 +1496,19 @@ static int hdac_hdmi_runtime_suspend(struct device *dev)
                return 0;
 
        /* Power down afg */
-       if (!snd_hdac_check_power_state(hdac, hdac->afg, AC_PWRST_D3))
+       if (!snd_hdac_check_power_state(hdac, hdac->afg, AC_PWRST_D3)) {
                snd_hdac_codec_write(hdac, hdac->afg, 0,
                        AC_VERB_SET_POWER_STATE, AC_PWRST_D3);
 
+               /* Wait till power state is set to D3 */
+               timeout = jiffies + msecs_to_jiffies(1000);
+               while (!snd_hdac_check_power_state(hdac, hdac->afg, AC_PWRST_D3)
+                               && time_before(jiffies, timeout)) {
+
+                       msleep(50);
+               }
+       }
+
        err = snd_hdac_display_power(bus, false);
        if (err < 0) {
                dev_err(bus->dev, "Cannot turn on display power on i915\n");