4 files changed, 18 insertions, 9 deletions

diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index a4f3a22caba3..ee45454c50be 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -757,6 +757,8 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
     model       - force the model name
     position_fix - Fix DMA pointer (0 = auto, 1 = use LPIB, 2 = POSBUF)
     probe_mask  - Bitmask to probe codecs (default = -1, meaning all slots)
+    probe_only  - Only probing and no codec initialization (default=off);
+                  Useful to check the initial codec status for debugging
     bdl_pos_adj - Specifies the DMA IRQ timing delay in samples.
                 Passing -1 will make the driver to choose the appropriate
                 value based on the controller chip.
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 625fe5984dd6..e16cf63821ae 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -709,7 +709,7 @@ static void snd_hda_codec_free(struct hda_codec *codec)
  * Returns 0 if successful, or a negative error code.
  */
 int /*__devinit*/ snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
-                                struct hda_codec **codecp)
+                                    int do_init, struct hda_codec **codecp)
 {
         struct hda_codec *codec;
         char component[31];
@@ -793,10 +793,12 @@ int /*__devinit*/ snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr
         if (bus->modelname)
                 codec->modelname = kstrdup(bus->modelname, GFP_KERNEL);
 
-        err = snd_hda_codec_configure(codec);
-        if (err < 0) {
-                snd_hda_codec_free(codec);
-                return err;
+        if (do_init) {
+                err = snd_hda_codec_configure(codec);
+                if (err < 0) {
+                        snd_hda_codec_free(codec);
+                        return err;
+                }
         }
         snd_hda_codec_proc_new(codec);
 
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 5587d416229f..729fc7642d7f 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -811,7 +811,7 @@ enum {
 int snd_hda_bus_new(struct snd_card *card, const struct hda_bus_template *temp,
                     struct hda_bus **busp);
 int snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
-                      struct hda_codec **codecp);
+                      int do_init, struct hda_codec **codecp);
 
 /*
  * low level functions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index a26ae8c4cf70..6613b6bef9eb 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -58,6 +58,7 @@ static char *model[SNDRV_CARDS];
 static int position_fix[SNDRV_CARDS];
 static int bdl_pos_adj[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = -1};
 static int probe_mask[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = -1};
+static int probe_only[SNDRV_CARDS];
 static int single_cmd;
 static int enable_msi;
 
@@ -76,6 +77,8 @@ module_param_array(bdl_pos_adj, int, NULL, 0644);
 MODULE_PARM_DESC(bdl_pos_adj, "BDL position adjustment offset.");
 module_param_array(probe_mask, int, NULL, 0444);
 MODULE_PARM_DESC(probe_mask, "Bitmask to probe codecs (default = -1).");
+module_param_array(probe_only, bool, NULL, 0444);
+MODULE_PARM_DESC(probe_only, "Only probing and no codec initialization.");
 module_param(single_cmd, bool, 0444);
 MODULE_PARM_DESC(single_cmd, "Use single command to communicate with codecs "
                  "(for debugging only).");
@@ -1224,7 +1227,8 @@ static unsigned int azx_max_codecs[AZX_NUM_DRIVERS] __devinitdata = {
 };
 
 static int __devinit azx_codec_create(struct azx *chip, const char *model,
-                                      unsigned int codec_probe_mask)
+                                      unsigned int codec_probe_mask,
+                                      int no_init)
 {
         struct hda_bus_template bus_temp;
         int c, codecs, err;
@@ -1282,7 +1286,7 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model,
         for (c = 0; c < max_slots; c++) {
                 if ((chip->codec_mask & (1 << c)) & codec_probe_mask) {
                         struct hda_codec *codec;
-                        err = snd_hda_codec_new(chip->bus, c, &codec);
+                        err = snd_hda_codec_new(chip->bus, c, !no_init, &codec);
                         if (err < 0)
                                 continue;
                         codecs++;
@@ -2340,7 +2344,8 @@ static int __devinit azx_probe(struct pci_dev *pci,
         card->private_data = chip;
 
         /* create codec instances */
-        err = azx_codec_create(chip, model[dev], probe_mask[dev]);
+        err = azx_codec_create(chip, model[dev], probe_mask[dev],
+                               probe_only[dev]);
         if (err < 0)
                 goto out_free;