From: Takashi Iwai <tiwai@suse.de>
To: Raymond Yau <superquad.vortex2@gmail.com>
Cc: ALSA Development Mailing List <alsa-devel@alsa-project.org>
Subject: Re: [PATCH] HDA - add "Independent HP" switch for ad1988
Date: Wed, 21 Sep 2011 10:45:07 +0200 [thread overview]
Message-ID: <s5h1uvaz3l8.wl%tiwai@suse.de> (raw)
In-Reply-To: <CAN8cciYWVwcCnrGjgn3Vrvoxd+j6GrKXNRzoqDMAExKMo5_+_Q@mail.gmail.com>
At Sun, 18 Sep 2011 07:18:28 +0800,
Raymond Yau wrote:
>
> Add "Independent HP" switch for ad1988
>
> - add playback device 2 "AD1988 HP" for 7.1+2 multi streaming playback
> - add "Independent HP" switch to enable/disable the feature
> switch is inactive and write protect when device 0 or device 2 is opened
> - remove 6stack-dig-fp model
Any rationale to remove this model?
I'm fine with the removal, but need to know the reason.
Also, regarding the patch:
> @@ -302,6 +304,71 @@ static int ad198x_check_power_status(struct hda_codec *codec, hda_nid_t nid)
> }
> #endif
>
> +static void activate_ctl(struct hda_codec *codec, const char *name, int active)
> +{
> + struct snd_kcontrol *ctl = snd_hda_find_mixer_ctl(codec, name);
> + if (ctl) {
> + ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
> + ctl->vd[0].access |= active ? 0:SNDRV_CTL_ELEM_ACCESS_INACTIVE;
> + ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_WRITE;
Please use tabs.
> + ctl->vd[0].access |= active ? SNDRV_CTL_ELEM_ACCESS_WRITE:0;
> + snd_ctl_notify(codec->bus->card,
> + SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
> + }
> +}
> +
> + static void set_stream_active(struct hda_codec *codec, bool active)
> +{
> + struct ad198x_spec *spec = codec->spec;
> + if (active)
> + spec->num_active_streams++;
> + else
> + spec->num_active_streams--;
> + activate_ctl(codec, "Independent HP", spec->num_active_streams == 0);
> + printk(KERN_INFO "set stream active : active stream %d \n", spec->num_active_streams);
Avoid debug prints in the final code.
If any, use snd_printdd() or such.
> +}
+
+static int ad1988_independent_hp_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ static const char * const texts[] = { "OFF", "ON", NULL};
+ int index;
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+ uinfo->count = 1;
+ uinfo->value.enumerated.items = 2;
+ index = uinfo->value.enumerated.item;
+ if (index >= 2)
+ index = 1;
+ strcpy(uinfo->value.enumerated.name, texts[index]);
+ return 0;
+}
+
+static int ad1988_independent_hp_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct ad198x_spec *spec = codec->spec;
+ ucontrol->value.enumerated.item[0] = spec->independent_hp;
+ return 0;
+}
+
+static int ad1988_independent_hp_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct ad198x_spec *spec = codec->spec;
+ unsigned int select = ucontrol->value.enumerated.item[0];
+ if (spec->independent_hp != select) {
+ spec->independent_hp = select;
+ if (spec->independent_hp)
+ spec->multiout.hp_nid = 0;
+ else
+ spec->multiout.hp_nid = spec->alt_dac_nid[0];
+ return 1;
+ }
+ return 0;
+}
Changing spec->multiout.hp_nid dynamically here is racy. If the value
is changed during the PCM stream is opened, the HP-setup might be kept
inconsistent at close.
thanks,
Takashi
next prev parent reply other threads:[~2011-09-21 8:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-17 23:18 [PATCH] HDA - add "Independent HP" switch for ad1988 Raymond Yau
2011-09-21 8:45 ` Takashi Iwai [this message]
2011-09-22 2:32 ` Raymond Yau
2011-09-22 10:44 ` Takashi Iwai
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