ALSA: emu10k1: handle dock disconnects

When the dock on an E-mu 1010 card is disconnected, all outputs get
muted by the hardware. Add logic to detect a disconnect and unmute.

Signed-off-by: Michael Gernoth <michael@gernoth.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index 4887299011ef..54079f5d5673 100644
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -707,6 +707,7 @@ static int emu1010_firmware_thread(void *data)
 {
         struct snd_emu10k1 *emu = data;
         u32 tmp, tmp2, reg;
+        u32 last_reg = 0;
         int err;
 
         for (;;) {
@@ -782,7 +783,15 @@ static int emu1010_firmware_thread(void *data)
                         msleep(10);
                         /* Unmute all. Default is muted after a firmware load */
                         snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE);
+                } else if (!reg && last_reg) {
+                        /* Audio Dock removed */
+                        dev_info(emu->card->dev,
+                                 "emu1010: Audio Dock detached\n");
+                        /* Unmute all */
+                        snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE);
                 }
+
+                last_reg = reg;
         }
         dev_info(emu->card->dev, "emu1010: firmware thread stopping\n");
         return 0;