[ALSA] hda-intel - Show the last command in warning messages

Show the last issued command in warning messages when any communication
error with CORB/RIRB occurs.
Also, a bit code clean-up for composing the command value in
*_send_cmd().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/pci/hda/hda_intel.c

@@ -341,6 +341,9 @@ struct azx {
 	unsigned int single_cmd :1;
 	unsigned int polling_mode :1;
 	unsigned int msi :1;
+
+	/* for debugging */
+	unsigned int last_cmd;	/* last issued command (to sync) */
 };
 
 /* driver types */
@@ -466,18 +469,10 @@ static void azx_free_cmd_io(struct azx *chip)
 }
 
 /* send a command */
-static int azx_corb_send_cmd(struct hda_codec *codec, hda_nid_t nid, int direct,
-			     unsigned int verb, unsigned int para)
+static int azx_corb_send_cmd(struct hda_codec *codec, u32 val)
 {
 	struct azx *chip = codec->bus->private_data;
 	unsigned int wp;
-	u32 val;
-
-	val = (u32)(codec->addr & 0x0f) << 28;
-	val |= (u32)direct << 27;
-	val |= (u32)nid << 20;
-	val |= verb << 8;
-	val |= para;
 
 	/* add command to corb */
 	wp = azx_readb(chip, CORBWP);
@@ -543,7 +538,7 @@ static unsigned int azx_rirb_get_response(struct hda_codec *codec)
 
 	if (chip->msi) {
 		snd_printk(KERN_WARNING "hda_intel: No response from codec, "
-			   "disabling MSI...\n");
+			   "disabling MSI: last cmd=0x%08x\n", chip->last_cmd);
 		free_irq(chip->irq, chip);
 		chip->irq = -1;
 		pci_disable_msi(chip->pci);
@@ -555,13 +550,15 @@ static unsigned int azx_rirb_get_response(struct hda_codec *codec)
 
 	if (!chip->polling_mode) {
 		snd_printk(KERN_WARNING "hda_intel: azx_get_response timeout, "
-			   "switching to polling mode...\n");
+			   "switching to polling mode: last cmd=0x%08x\n",
+			   chip->last_cmd);
 		chip->polling_mode = 1;
 		goto again;
 	}
 
 	snd_printk(KERN_ERR "hda_intel: azx_get_response timeout, "
-		   "switching to single_cmd mode...\n");
+		   "switching to single_cmd mode: last cmd=0x%08x\n",
+		   chip->last_cmd);
 	chip->rirb.rp = azx_readb(chip, RIRBWP);
 	chip->rirb.cmds = 0;
 	/* switch to single_cmd mode */
@@ -581,20 +578,11 @@ static unsigned int azx_rirb_get_response(struct hda_codec *codec)
  */
 
 /* send a command */
-static int azx_single_send_cmd(struct hda_codec *codec, hda_nid_t nid,
-			       int direct, unsigned int verb,
-			       unsigned int para)
+static int azx_single_send_cmd(struct hda_codec *codec, u32 val)
 {
 	struct azx *chip = codec->bus->private_data;
-	u32 val;
 	int timeout = 50;
 
-	val = (u32)(codec->addr & 0x0f) << 28;
-	val |= (u32)direct << 27;
-	val |= (u32)nid << 20;
-	val |= verb << 8;
-	val |= para;
-
 	while (timeout--) {
 		/* check ICB busy bit */
 		if (! (azx_readw(chip, IRS) & ICH6_IRS_BUSY)) {
@@ -639,10 +627,19 @@ static int azx_send_cmd(struct hda_codec *codec, hda_nid_t nid,
 			unsigned int para)
 {
 	struct azx *chip = codec->bus->private_data;
+	u32 val;
+
+	val = (u32)(codec->addr & 0x0f) << 28;
+	val |= (u32)direct << 27;
+	val |= (u32)nid << 20;
+	val |= verb << 8;
+	val |= para;
+	chip->last_cmd = val;
+
 	if (chip->single_cmd)
-		return azx_single_send_cmd(codec, nid, direct, verb, para);
+		return azx_single_send_cmd(codec, val);
 	else
-		return azx_corb_send_cmd(codec, nid, direct, verb, para);
+		return azx_corb_send_cmd(codec, val);
 }
 
 /* get a response */