Sorry, I forgot to add [alsa-devel] and [RFC]. I will resend the patch. Sorry for the inconvenience
Regards, Libin
-----Original Message----- From: Yang, Libin Sent: Monday, January 7, 2019 10:12 AM To: alsa-devel@alsa-project.org; tiwai@suse.de; broonie@kernel.org Cc: liam.r.girdwood@linux.intel.com; pierre-louis.bossart@linux.intel.com; Lin, Mengdong mengdong.lin@intel.com; Yang, Libin libin.yang@intel.com Subject: [PATCH 1/2] ASoC: refine ASoC hdmi audio suspend/resume
From: Libin Yang libin.yang@intel.com
hdmi_codec_prepare() will trigger hdmi runtime resume, which will set the bitmask of hdev->addr. And skl_suspend() will clear the bitmask of HDA_CODEC_IDX_CONTROLLER. HDMI codec idx is not the same as HDA_CODEC_IDX_CONTROLLER, which means i915 power will not be released when suspend.
On the other hand, hdmi_codec_prepare() don't need to call pm_runtime_get_sync() to wake up the audio subsystem (HDMI auido) for setting the codec registers. Turning display power on with snd_hdac_display_power() is enough.
Let's use S3 without playback as an example: hdmi_codec_prepare() invokes the runtime resume of codec => snd_hdac_display_power(bus, hdev->addr, true) skl runtime resume skl_suspend() => snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
THis means hdev->addr will never release the display power when suspend.
The new sequence will be: hdmi_codec_prepare() => snd_hdac_display_power(bus, hdev->addr, true) snd_hdac_display_power(bus, hdev->addr, false) skl runtime resume skl suspned
Signed-off-by: Libin Yang libin.yang@intel.com
sound/soc/codecs/hdac_hdmi.c | 6 ++++-- sound/soc/intel/skylake/skl.c | 7
2 files changed, 4 insertions(+), 9 deletions(-)
diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c index 3ab2949..782b323 100644 --- a/sound/soc/codecs/hdac_hdmi.c +++ b/sound/soc/codecs/hdac_hdmi.c @@ -1895,7 +1895,7 @@ static int hdmi_codec_prepare(struct device *dev) { struct hdac_device *hdev = dev_to_hdac_dev(dev);
- pm_runtime_get_sync(&hdev->dev);
snd_hdac_display_power(hdev->bus, hdev->addr, true);
/*
- Power down afg.
@@ -1906,6 +1906,7 @@ static int hdmi_codec_prepare(struct device *dev) */ snd_hdac_codec_read(hdev, hdev->afg, 0, AC_VERB_SET_POWER_STATE, AC_PWRST_D3);
snd_hdac_display_power(hdev->bus, hdev->addr, false);
return 0;
} @@ -1915,6 +1916,7 @@ static void hdmi_codec_complete(struct device *dev) struct hdac_device *hdev = dev_to_hdac_dev(dev); struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(hdev);
- snd_hdac_display_power(hdev->bus, hdev->addr, true); /* Power up afg */ snd_hdac_codec_read(hdev, hdev->afg, 0, AC_VERB_SET_POWER_STATE, AC_PWRST_D0);
@@ -1930,7 +1932,7 @@ static void hdmi_codec_complete(struct device *dev) */ hdac_hdmi_present_sense_all_pins(hdev, hdmi, false);
- pm_runtime_put_sync(&hdev->dev);
- snd_hdac_display_power(hdev->bus, hdev->addr, false);
} #else #define hdmi_codec_prepare NULL diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c index 60c9483..89f4d66 100644 --- a/sound/soc/intel/skylake/skl.c +++ b/sound/soc/intel/skylake/skl.c @@ -336,9 +336,6 @@ static int skl_suspend(struct device *dev) skl->skl_sst->fw_loaded = false; }
- if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
snd_hdac_display_power(bus,HDA_CODEC_IDX_CONTROLLER, false);
- return 0;
}
@@ -350,10 +347,6 @@ static int skl_resume(struct device *dev) struct hdac_ext_link *hlink = NULL; int ret;
- /* Turned OFF in HDMI codec driver after codec reconfiguration */
- if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
snd_hdac_display_power(bus,HDA_CODEC_IDX_CONTROLLER, true);
- /*
- resume only when we are not in suspend active, otherwise need to
- restore the device
-- 2.7.4