ALSA: cs46xx - Fix suspend/resume with new DSP

Fix the basic suspend/resume of snd-cs46xx drivers with new DSP.

References:
	https://bugzilla.redhat.com/show_bug.cgi?id=498287
	https://bugzilla.redhat.com/show_bug.cgi?id=160751

Tested-by: Florian Zumbiehl <florz@florz.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/cs46xx_dsp_spos.h

@@ -118,9 +118,11 @@ struct dsp_scb_descriptor {
 
 	struct snd_info_entry *proc_info;
 	int ref_count;
-	spinlock_t lock;
 
-	int deleted;
+	u16 volume[2];
+	unsigned int deleted :1;
+	unsigned int updated :1;
+	unsigned int volume_set :1;
 };
 
 struct dsp_task_descriptor {

sound/pci/cs46xx/cs46xx_lib.c

@@ -3597,7 +3597,7 @@ static struct cs_card_type __devinitdata cards[] = {
 #ifdef CONFIG_PM
 static unsigned int saved_regs[] = {
 	BA0_ACOSV,
-	BA0_ASER_FADDR,
+	/*BA0_ASER_FADDR,*/
 	BA0_ASER_MASTER,
 	BA1_PVOL,
 	BA1_CVOL,

sound/pci/cs46xx/dsp_spos.c

@@ -298,6 +298,9 @@ void  cs46xx_dsp_spos_destroy (struct snd_cs46xx * chip)
 		if (ins->scbs[i].deleted) continue;
 
 		cs46xx_dsp_proc_free_scb_desc ( (ins->scbs + i) );
+#ifdef CONFIG_PM
+		kfree(ins->scbs[i].data);
+#endif
 	}
 
 	kfree(ins->code.data);
@@ -974,13 +977,11 @@ static struct dsp_scb_descriptor * _map_scb (struct snd_cs46xx *chip, char * nam
 
 	index = find_free_scb_index (ins);
 
+	memset(&ins->scbs[index], 0, sizeof(ins->scbs[index]));
 	strcpy(ins->scbs[index].scb_name, name);
 	ins->scbs[index].address = dest;
 	ins->scbs[index].index = index;
-	ins->scbs[index].proc_info = NULL;
 	ins->scbs[index].ref_count = 1;
-	ins->scbs[index].deleted = 0;
-	spin_lock_init(&ins->scbs[index].lock);
 
 	desc = (ins->scbs + index);
 	ins->scbs[index].scb_symbol = add_symbol (chip, name, dest, SYMBOL_PARAMETER);
@@ -1022,17 +1023,29 @@ _map_task_tree (struct snd_cs46xx *chip, char * name, u32 dest, u32 size)
 	return desc;
 }
 
+#define SCB_BYTES	(0x10 * 4)
+
 struct dsp_scb_descriptor *
 cs46xx_dsp_create_scb (struct snd_cs46xx *chip, char * name, u32 * scb_data, u32 dest)
 {
 	struct dsp_scb_descriptor * desc;
 
+#ifdef CONFIG_PM
+	/* copy the data for resume */
+	scb_data = kmemdup(scb_data, SCB_BYTES, GFP_KERNEL);
+	if (!scb_data)
+		return NULL;
+#endif
+
 	desc = _map_scb (chip,name,dest);
 	if (desc) {
 		desc->data = scb_data;
 		_dsp_create_scb(chip,scb_data,dest);
 	} else {
 		snd_printk(KERN_ERR "dsp_spos: failed to map SCB\n");
+#ifdef CONFIG_PM
+		kfree(scb_data);
+#endif
 	}
 
 	return desc;
@@ -1988,7 +2001,28 @@ int cs46xx_dsp_resume(struct snd_cs46xx * chip)
 			continue;
 		_dsp_create_scb(chip, s->data, s->address);
 	}
-
+	for (i = 0; i < ins->nscb; i++) {
+		struct dsp_scb_descriptor *s = &ins->scbs[i];
+		if (s->deleted)
+			continue;
+		if (s->updated)
+			cs46xx_dsp_spos_update_scb(chip, s);
+		if (s->volume_set)
+			cs46xx_dsp_scb_set_volume(chip, s,
+						  s->volume[0], s->volume[1]);
+	}
+	if (ins->spdif_status_out & DSP_SPDIF_STATUS_HW_ENABLED) {
+		cs46xx_dsp_enable_spdif_hw(chip);
+		snd_cs46xx_poke(chip, (ins->ref_snoop_scb->address + 2) << 2,
+				(OUTPUT_SNOOP_BUFFER + 0x10) << 0x10);
+		if (ins->spdif_status_out & DSP_SPDIF_STATUS_PLAYBACK_OPEN)
+			cs46xx_poke_via_dsp(chip, SP_SPDOUT_CSUV,
+					    ins->spdif_csuv_stream);
+	}
+	if (chip->dsp_spos_instance->spdif_status_in) {
+		cs46xx_poke_via_dsp(chip, SP_ASER_COUNTDOWN, 0x80000005);
+		cs46xx_poke_via_dsp(chip, SP_SPDIN_CONTROL, 0x800003ff);
+	}
 	return 0;
 }
 #endif

sound/pci/cs46xx/dsp_spos.h

@@ -212,6 +212,7 @@ static inline void cs46xx_dsp_spos_update_scb (struct snd_cs46xx * chip,
 			(scb->address + SCBsubListPtr) << 2,
 			(scb->sub_list_ptr->address << 0x10) |
 			(scb->next_scb_ptr->address));	
+	scb->updated = 1;
 }
 
 static inline void cs46xx_dsp_scb_set_volume (struct snd_cs46xx * chip,
@@ -222,6 +223,9 @@ static inline void cs46xx_dsp_scb_set_volume (struct snd_cs46xx * chip,
 
 	snd_cs46xx_poke(chip, (scb->address + SCBVolumeCtrl) << 2, val);
 	snd_cs46xx_poke(chip, (scb->address + SCBVolumeCtrl + 1) << 2, val);
+	scb->volume_set = 1;
+	scb->volume[0] = left;
+	scb->volume[1] = right;
 }
 #endif /* __DSP_SPOS_H__ */
 #endif /* CONFIG_SND_CS46XX_NEW_DSP  */

sound/pci/cs46xx/dsp_spos_scb_lib.c

@@ -115,7 +115,6 @@ static void cs46xx_dsp_proc_scb_info_read (struct snd_info_entry *entry,
 static void _dsp_unlink_scb (struct snd_cs46xx *chip, struct dsp_scb_descriptor * scb)
 {
 	struct dsp_spos_instance * ins = chip->dsp_spos_instance;
-	unsigned long flags;
 
 	if ( scb->parent_scb_ptr ) {
 		/* unlink parent SCB */
@@ -153,8 +152,6 @@ static void _dsp_unlink_scb (struct snd_cs46xx *chip, struct dsp_scb_descriptor
 			scb->next_scb_ptr = ins->the_null_scb;
 		}
 
-		spin_lock_irqsave(&chip->reg_lock, flags);    
-
 		/* update parent first entry in DSP RAM */
 		cs46xx_dsp_spos_update_scb(chip,scb->parent_scb_ptr);
 
@@ -162,7 +159,6 @@ static void _dsp_unlink_scb (struct snd_cs46xx *chip, struct dsp_scb_descriptor
 		cs46xx_dsp_spos_update_scb(chip,scb);
 
 		scb->parent_scb_ptr = NULL;
-		spin_unlock_irqrestore(&chip->reg_lock, flags);
 	}
 }
 
@@ -197,9 +193,9 @@ void cs46xx_dsp_remove_scb (struct snd_cs46xx *chip, struct dsp_scb_descriptor *
 		goto _end;
 #endif
 
-	spin_lock_irqsave(&scb->lock, flags);
+	spin_lock_irqsave(&chip->reg_lock, flags);    
 	_dsp_unlink_scb (chip,scb);
-	spin_unlock_irqrestore(&scb->lock, flags);
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
 
 	cs46xx_dsp_proc_free_scb_desc(scb);
 	if (snd_BUG_ON(!scb->scb_symbol))
@@ -207,6 +203,10 @@ void cs46xx_dsp_remove_scb (struct snd_cs46xx *chip, struct dsp_scb_descriptor *
 	remove_symbol (chip,scb->scb_symbol);
 
 	ins->scbs[scb->index].deleted = 1;
+#ifdef CONFIG_PM
+	kfree(ins->scbs[scb->index].data);
+	ins->scbs[scb->index].data = NULL;
+#endif
 
 	if (scb->index < ins->scb_highest_frag_index)
 		ins->scb_highest_frag_index = scb->index;
@@ -1508,20 +1508,17 @@ int cs46xx_dsp_pcm_unlink (struct snd_cs46xx * chip,
 		       chip->dsp_spos_instance->npcm_channels <= 0))
 		return -EIO;
 
-	spin_lock(&pcm_channel->src_scb->lock);
-
+	spin_lock_irqsave(&chip->reg_lock, flags);
 	if (pcm_channel->unlinked) {
-		spin_unlock(&pcm_channel->src_scb->lock);
+		spin_unlock_irqrestore(&chip->reg_lock, flags);
 		return -EIO;
 	}
 
-	spin_lock_irqsave(&chip->reg_lock, flags);
 	pcm_channel->unlinked = 1;
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
 
 	_dsp_unlink_scb (chip,pcm_channel->pcm_reader_scb);
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
 
-	spin_unlock(&pcm_channel->src_scb->lock);
 	return 0;
 }
 
@@ -1533,10 +1530,10 @@ int cs46xx_dsp_pcm_link (struct snd_cs46xx * chip,
 	struct dsp_scb_descriptor * src_scb = pcm_channel->src_scb;
 	unsigned long flags;
 
-	spin_lock(&pcm_channel->src_scb->lock);
+	spin_lock_irqsave(&chip->reg_lock, flags);
 
 	if (pcm_channel->unlinked == 0) {
-		spin_unlock(&pcm_channel->src_scb->lock);
+		spin_unlock_irqrestore(&chip->reg_lock, flags);
 		return -EIO;
 	}
 
@@ -1552,8 +1549,6 @@ int cs46xx_dsp_pcm_link (struct snd_cs46xx * chip,
 	snd_BUG_ON(pcm_channel->pcm_reader_scb->parent_scb_ptr);
 	pcm_channel->pcm_reader_scb->parent_scb_ptr = parent_scb;
 
-	spin_lock_irqsave(&chip->reg_lock, flags);
-
 	/* update SCB entry in DSP RAM */
 	cs46xx_dsp_spos_update_scb(chip,pcm_channel->pcm_reader_scb);
 
@@ -1562,8 +1557,6 @@ int cs46xx_dsp_pcm_link (struct snd_cs46xx * chip,
 
 	pcm_channel->unlinked = 0;
 	spin_unlock_irqrestore(&chip->reg_lock, flags);
-
-	spin_unlock(&pcm_channel->src_scb->lock);
 	return 0;
 }
 
@@ -1596,13 +1589,17 @@ cs46xx_add_record_source (struct snd_cs46xx *chip, struct dsp_scb_descriptor * s
 
 int cs46xx_src_unlink(struct snd_cs46xx *chip, struct dsp_scb_descriptor * src)
 {
+	unsigned long flags;
+
 	if (snd_BUG_ON(!src->parent_scb_ptr))
 		return -EINVAL;
 
 	/* mute SCB */
 	cs46xx_dsp_scb_set_volume (chip,src,0,0);
 
+	spin_lock_irqsave(&chip->reg_lock, flags);
 	_dsp_unlink_scb (chip,src);
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
 
 	return 0;
 }