ALSA: ice1724 - Patch for suspend/resume for Audiotrak Prodigy HD2

I've built a small HTPC and had to add suspend/resume support in ice1724
driver. There seem to be 3 existing bugs related to that:

https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4413
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3748
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2314

Due to hardware (un)availability, I only enabled the fix for Audiotrak
Prodigy HD2 card, which is installed in my HTPC. However, most of my code
should be reusable in the future on other ice1724-based cards as well (as
long as people add card-specific peices of code). The fix is currently based
on ALSA 1.0.20 and works on my MythBuntu 9.04 HTPC (using 2.6.28-11 kernel).

Signed-off-by: Igor Chernyshev <igor.ch75+alsa at gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/pci/ice1712/ice1712.h b/sound/pci/ice1712/ice1712.h
index adc909ec125c..9da2dae64c5b 100644
--- a/sound/pci/ice1712/ice1712.h
+++ b/sound/pci/ice1712/ice1712.h
@@ -379,6 +379,15 @@ struct snd_ice1712 {
         unsigned char (*set_mclk)(struct snd_ice1712 *ice, unsigned int rate);
         void (*set_spdif_clock)(struct snd_ice1712 *ice);
 
+#ifdef CONFIG_PM
+        int (*pm_suspend)(struct snd_ice1712 *);
+        int (*pm_resume)(struct snd_ice1712 *);
+        int pm_suspend_enabled:1;
+        int pm_saved_is_spdif_master:1;
+        unsigned int pm_saved_spdif_ctrl;
+        unsigned char pm_saved_spdif_cfg;
+        unsigned int pm_saved_route;
+#endif
 };