ALSA: ymfpci - Fix legacy registers on S3/S4 resume

We need to resume two legacy registers to recover MIDI/FM functionality
on S3/S4 resume, too.

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

2 files changed, 11 insertions, 0 deletions

diff --git a/include/sound/ymfpci.h b/include/sound/ymfpci.h
index 444cd6ba0ba7..41199664666b 100644
--- a/include/sound/ymfpci.h
+++ b/include/sound/ymfpci.h
@@ -366,6 +366,8 @@ struct snd_ymfpci {
 #ifdef CONFIG_PM
         u32 *saved_regs;
         u32 saved_ydsxgr_mode;
+        u16 saved_dsxg_legacy;
+        u16 saved_dsxg_elegacy;
 #endif
 };
 
diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index 03ee4e365311..a3a2eababc01 100644
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -2310,6 +2310,10 @@ int snd_ymfpci_suspend(struct pci_dev *pci, pm_message_t state)
         for (i = 0; i < YDSXGR_NUM_SAVED_REGS; i++)
                 chip->saved_regs[i] = snd_ymfpci_readl(chip, saved_regs_index[i]);
         chip->saved_ydsxgr_mode = snd_ymfpci_readl(chip, YDSXGR_MODE);
+        pci_read_config_word(chip->pci, PCIR_DSXG_LEGACY,
+                             &chip->saved_dsxg_legacy);
+        pci_read_config_word(chip->pci, PCIR_DSXG_ELEGACY,
+                             &chip->saved_dsxg_elegacy);
         snd_ymfpci_writel(chip, YDSXGR_NATIVEDACOUTVOL, 0);
         snd_ymfpci_writel(chip, YDSXGR_BUF441OUTVOL, 0);
         snd_ymfpci_disable_dsp(chip);
@@ -2344,6 +2348,11 @@ int snd_ymfpci_resume(struct pci_dev *pci)
 
         snd_ac97_resume(chip->ac97);
 
+        pci_write_config_word(chip->pci, PCIR_DSXG_LEGACY,
+                              chip->saved_dsxg_legacy);
+        pci_write_config_word(chip->pci, PCIR_DSXG_ELEGACY,
+                              chip->saved_dsxg_elegacy);
+
         /* start hw again */
         if (chip->start_count > 0) {
                 spin_lock_irq(&chip->reg_lock);