ASoC: Wait for non-AC97 codec DAIs before instantiating

This will allow codec drivers to be refactored to allow them to be
registered out of line with the ASoC device registration.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 26 insertions, 1 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 717db0e6499b..76a89eb65baf 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -788,7 +788,7 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
         struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
         struct snd_soc_platform *platform;
         struct snd_soc_dai *dai;
-        int i, found, ret;
+        int i, found, ret, ac97;
 
         if (card->instantiated)
                 return;
@@ -805,6 +805,7 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
                 return;
         }
 
+        ac97 = 0;
         for (i = 0; i < card->num_links; i++) {
                 found = 0;
                 list_for_each_entry(dai, &dai_list, list)
@@ -817,8 +818,32 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
                                 card->dai_link[i].cpu_dai->name);
                         return;
                 }
+
+                if (card->dai_link[i].cpu_dai->ac97_control)
+                        ac97 = 1;
         }
 
+        /* If we have AC97 in the system then don't wait for the
+         * codec.  This will need revisiting if we have to handle
+         * systems with mixed AC97 and non-AC97 parts.  Only check for
+         * DAIs currently; we can't do this per link since some AC97
+         * codecs have non-AC97 DAIs.
+         */
+        if (!ac97)
+                for (i = 0; i < card->num_links; i++) {
+                        found = 0;
+                        list_for_each_entry(dai, &dai_list, list)
+                                if (card->dai_link[i].codec_dai == dai) {
+                                        found = 1;
+                                        break;
+                                }
+                        if (!found) {
+                                dev_dbg(card->dev, "DAI %s not registered\n",
+                                        card->dai_link[i].codec_dai->name);
+                                return;
+                        }
+                }
+
         /* Note that we do not current check for codec components */
 
         dev_dbg(card->dev, "All components present, instantiating\n");