[PATCH] pmac: save master volume on sleep

Ben's patch that shutdowns master switch and restores it after resume
("pmac: Improve sleep code of tumbler driver") isn't enough here on an
iBook (snapper chip).

The master switch is correctly saved and restored, but somehow
tumbler_put_master_volume() gets called just after
tumbler_set_master_volume() and sets mix->master_vol[*] to 0.  So, on
resuming, the master switch is reenabled, but the volume is set to 0.

Here's a patch that also saves and restores master_vol.

Signed-off-by: Colin Leroy <colin@colino.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/sound/ppc/tumbler.c b/sound/ppc/tumbler.c
index f3e010793a6a..9332237cb6a4 100644
--- a/sound/ppc/tumbler.c
+++ b/sound/ppc/tumbler.c
@@ -99,6 +99,7 @@ typedef struct pmac_tumbler_t {
         pmac_gpio_t hp_detect;
         int headphone_irq;
         int lineout_irq;
+        unsigned int save_master_vol[2];
         unsigned int master_vol[2];
         unsigned int save_master_switch[2];
         unsigned int master_switch[2];
@@ -1139,6 +1140,8 @@ static void tumbler_suspend(pmac_t *chip)
                 disable_irq(mix->lineout_irq);
         mix->save_master_switch[0] = mix->master_switch[0];
         mix->save_master_switch[1] = mix->master_switch[1];
+        mix->save_master_vol[0] = mix->master_vol[0];
+        mix->save_master_vol[1] = mix->master_vol[1];
         mix->master_switch[0] = mix->master_switch[1] = 0;
         tumbler_set_master_volume(mix);
         if (!mix->anded_reset) {
@@ -1166,6 +1169,8 @@ static void tumbler_resume(pmac_t *chip)
         mix->acs &= ~1;
         mix->master_switch[0] = mix->save_master_switch[0];
         mix->master_switch[1] = mix->save_master_switch[1];
+        mix->master_vol[0] = mix->save_master_vol[0];
+        mix->master_vol[1] = mix->save_master_vol[1];
         tumbler_reset_audio(chip);
         if (mix->i2c.client && mix->i2c.init_client) {
                 if (mix->i2c.init_client(&mix->i2c) < 0)