[ALSA] powermac - Add AUTO_DRC config

PPC,PPC Tumbler driver
Added AUTO_DRC kernel config to enable/disable the auto-DRC-toggle
feature on tumbler/snapper.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 30 insertions, 7 deletions

diff --git a/sound/ppc/Kconfig b/sound/ppc/Kconfig
index bda5bc4e6148..206b9333f91f 100644
--- a/sound/ppc/Kconfig
+++ b/sound/ppc/Kconfig
@@ -20,5 +20,17 @@ config SND_POWERMAC
           To compile this driver as a module, choose M here: the module
           will be called snd-powermac.
 
-endmenu
+config SND_POWERMAC_AUTO_DRC
+        bool "Toggle DRC automatically at headphone/line plug-in"
+        depends on SND_POWERMAC
+        default y
+        help
+          Say Y here to enable the automatic toggle of DRC (dynamic
+          range compression) on Tumbler/Snapper.
+          If this feature is enabled, DRC is turned off when the
+          headphone/line jack is plugged, and turned on when unplugged.
 
+          Note that you can turn on/off DRC manually even without this
+          option.
+
+endmenu
diff --git a/sound/ppc/tumbler.c b/sound/ppc/tumbler.c
index b94437c024b1..65384afcfc3f 100644
--- a/sound/ppc/tumbler.c
+++ b/sound/ppc/tumbler.c
@@ -948,7 +948,6 @@ static void device_change_handler(void *self)
                         msleep(10);
                 check_mute(chip, &mix->amp_mute, 1, mix->auto_mute_notify,
                            chip->speaker_sw_ctl);
-                mix->drc_enable = 0;
         } else {
                 /* unmute speaker, mute others */
                 check_mute(chip, &mix->amp_mute, 0, mix->auto_mute_notify,
@@ -960,20 +959,21 @@ static void device_change_handler(void *self)
                 if (mix->line_mute.addr != 0)
                         check_mute(chip, &mix->line_mute, 1, mix->auto_mute_notify,
                                    chip->lineout_sw_ctl);
-                mix->drc_enable = 1;
         }
-        if (mix->auto_mute_notify) {
+        if (mix->auto_mute_notify)
                 snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
                                        &chip->hp_detect_ctl->id);
+
+#ifdef CONFIG_SND_POWERMAC_AUTO_DRC
+        mix->drc_enable = ! (headphone || lineout);
+        if (mix->auto_mute_notify)
                 snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
                                &chip->drc_sw_ctl->id);
-        }
-
-        /* first set the DRC so the speaker do not explode -ReneR */
         if (chip->model == PMAC_TUMBLER)
                 tumbler_set_drc(mix);
         else
                 snapper_set_drc(mix);
+#endif
 
         /* reset the master volume so the correct amplification is applied */
         tumbler_set_master_volume(mix);
@@ -1370,6 +1370,17 @@ int __init snd_pmac_tumbler_init(pmac_t *chip)
         if ((err = snd_ctl_add(chip->card, chip->drc_sw_ctl)) < 0)
                 return err;
 
+        /* set initial DRC range to 60% */
+        if (chip->model == PMAC_TUMBLER)
+                mix->drc_range = (TAS3001_DRC_MAX * 6) / 10;
+        else
+                mix->drc_range = (TAS3004_DRC_MAX * 6) / 10;
+        mix->drc_enable = 1; /* will be changed later if AUTO_DRC is set */
+        if (chip->model == PMAC_TUMBLER)
+                tumbler_set_drc(mix);
+        else
+                snapper_set_drc(mix);
+
 #ifdef CONFIG_PM
         chip->suspend = tumbler_suspend;
         chip->resume = tumbler_resume;