From: Takashi Iwai tiwai@suse.de
commit 4914da2fb0c89205790503f20dfdde854f3afdd8 upstream.
We apply the codec resume forcibly at system resume callback for updating and syncing the jack detection state that may have changed during sleeping. This is, however, superfluous for the codec like Intel HDMI/DP, where the jack detection is managed via the audio component notification; i.e. the jack state change shall be reported sooner or later from the graphics side at mode change.
This patch changes the codec resume callback to avoid the forcible resume conditionally with a new flag, codec->relaxed_resume, for reducing the resume time. The flag is set in the codec probe.
Although this doesn't fix the entire bug mentioned in the bugzilla entry below, it's still a good optimization and some improvements are seen.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=201901 Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- include/sound/hda_codec.h | 2 ++ sound/pci/hda/hda_codec.c | 8 ++++++-- sound/pci/hda/patch_hdmi.c | 6 +++++- 3 files changed, 13 insertions(+), 3 deletions(-)
--- a/include/sound/hda_codec.h +++ b/include/sound/hda_codec.h @@ -262,6 +262,8 @@ struct hda_codec { unsigned int auto_runtime_pm:1; /* enable automatic codec runtime pm */ unsigned int force_pin_prefix:1; /* Add location prefix */ unsigned int link_down_at_suspend:1; /* link down at runtime suspend */ + unsigned int relaxed_resume:1; /* don't resume forcibly for jack */ + #ifdef CONFIG_PM unsigned long power_on_acct; unsigned long power_off_acct; --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -2955,15 +2955,19 @@ static int hda_codec_runtime_resume(stru #ifdef CONFIG_PM_SLEEP static int hda_codec_force_resume(struct device *dev) { + struct hda_codec *codec = dev_to_hda_codec(dev); + bool forced_resume = !codec->relaxed_resume; int ret;
/* The get/put pair below enforces the runtime resume even if the * device hasn't been used at suspend time. This trick is needed to * update the jack state change during the sleep. */ - pm_runtime_get_noresume(dev); + if (forced_resume) + pm_runtime_get_noresume(dev); ret = pm_runtime_force_resume(dev); - pm_runtime_put(dev); + if (forced_resume) + pm_runtime_put(dev); return ret; }
--- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2304,8 +2304,10 @@ static void generic_hdmi_free(struct hda struct hdmi_spec *spec = codec->spec; int pin_idx, pcm_idx;
- if (codec_has_acomp(codec)) + if (codec_has_acomp(codec)) { snd_hdac_acomp_register_notifier(&codec->bus->core, NULL); + codec->relaxed_resume = 0; + }
for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) { struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx); @@ -2578,6 +2580,8 @@ static void register_i915_notifier(struc spec->drm_audio_ops.pin_eld_notify = intel_pin_eld_notify; snd_hdac_acomp_register_notifier(&codec->bus->core, &spec->drm_audio_ops); + /* no need for forcible resume for jack check thanks to notifier */ + codec->relaxed_resume = 1; }
/* setup_stream ops override for HSW+ */