At Thu, 23 Apr 2015 21:12:50 +0200, Gabriele Mazzotta wrote:
On Sunday 19 April 2015 19:26:58 Gabriele Mazzotta wrote:
Hi,
I've recently found that commit a551d91473 ("ALSA: hda - Use regmap for command verb caches, too") is somehow causing a pop noise on startup when headphones are plugged in, but I couldn't figure out the exact cause. Was this observed on other systems (mine is a Dell XPS13 9333, Realtek ALC3661)? Does anyone have any idea of what the cause might be?
Hi,
I don't know why a551d91473 caused the issue, but I found the real cause of problem.
On init, create_input_ctls() sets the vref of nid 0x19 to 80 (as returned by snd_hda_get_default_vref()), but it should be set to HIZ. This is not so different from the issue addressed by f38663ab5c ("ALSA: hda - Set internal mic as default input source on Dell XPS 13 9333").
I made a patch to prevent this from happening.
Setting the vref is not necessary since alc_update_headset_mode() will take care of it.
Should I maybe add a new flag instead of using suppress_hp_mic_detect?
Yeah, that's better. Although the flag is currently unused, it's provided for a different purpose (to skip the headphone mic detection; which is different from "headset" mic).
I wonder, though, whether the patch below improves anything. A similar patch was in the development series in the past, but I had to drop it because it caused behavior error. But now I tried again, and it seems working.
Takashi
--- diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index 2a8aa9dfb83d..8e47d9cc369f 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -79,6 +79,7 @@ struct hdac_device { bool lazy_cache:1; /* don't wake up for writes */ bool caps_overwriting:1; /* caps overwrite being in process */ bool cache_coef:1; /* cache COEF read/write too */ + bool cache_only:1; /* don't write actually registers */ };
/* device/driver type used for matching */ diff --git a/sound/hda/hdac_regmap.c b/sound/hda/hdac_regmap.c index 7371e0c3926f..c5b3dcbbacdd 100644 --- a/sound/hda/hdac_regmap.c +++ b/sound/hda/hdac_regmap.c @@ -265,6 +265,9 @@ static int hda_reg_write(void *context, unsigned int reg, unsigned int val) unsigned int verb; int i, bytes, err;
+ if (codec->cache_only) + return 0; + reg &= ~0x00080000U; /* drop GET bit */ reg |= (codec->addr << 28); verb = get_verb(reg); diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index e70a7fb393dd..8f79d649975b 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -3156,28 +3156,29 @@ static void hda_call_codec_resume(struct hda_codec *codec) { atomic_inc(&codec->core.in_pm);
- if (codec->core.regmap) - regcache_mark_dirty(codec->core.regmap); - codec->power_jiffies = jiffies;
hda_set_power_state(codec, AC_PWRST_D0); restore_shutup_pins(codec); hda_exec_init_verbs(codec); snd_hda_jack_set_dirty_all(codec); + if (codec->core.regmap) { + regcache_mark_dirty(codec->core.regmap); + codec->core.cache_only = true; + } if (codec->patch_ops.resume) codec->patch_ops.resume(codec); - else { - if (codec->patch_ops.init) - codec->patch_ops.init(codec); - if (codec->core.regmap) - regcache_sync(codec->core.regmap); - } + else if (codec->patch_ops.init) + codec->patch_ops.init(codec);
if (codec->jackpoll_interval) hda_jackpoll_work(&codec->jackpoll_work.work); else snd_hda_jack_report_sync(codec); + if (codec->core.regmap) { + codec->core.cache_only = false; + regcache_sync(codec->core.regmap); + } atomic_dec(&codec->core.in_pm); }
diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c index 3d2597b7037b..844d5e6ae1a1 100644 --- a/sound/pci/hda/hda_generic.c +++ b/sound/pci/hda/hda_generic.c @@ -5780,8 +5780,6 @@ int snd_hda_gen_init(struct hda_codec *codec) /* call init functions of standard auto-mute helpers */ update_automute_all(codec);
- regcache_sync(codec->core.regmap); - if (spec->vmaster_mute.sw_kctl && spec->vmaster_mute.hook) snd_hda_sync_vmaster_hook(&spec->vmaster_mute);
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 5f44f60a6389..e4a774ddb1fc 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2211,7 +2211,6 @@ static int generic_hdmi_resume(struct hda_codec *codec) int pin_idx;
codec->patch_ops.init(codec); - regcache_sync(codec->core.regmap);
for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) { struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx); diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index b18b9c67b262..34219aa6a40e 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -799,7 +799,6 @@ static int alc_resume(struct hda_codec *codec) if (!spec->no_depop_delay) msleep(150); /* to avoid pop noise */ codec->patch_ops.init(codec); - regcache_sync(codec->core.regmap); hda_call_check_power_status(codec, 0x01); return 0; } @@ -3059,7 +3058,6 @@ static int alc269_resume(struct hda_codec *codec) msleep(200); }
- regcache_sync(codec->core.regmap); hda_call_check_power_status(codec, 0x01);
/* on some machine, the BIOS will clear the codec gpio data when enter