[PATCH 6/8] ASoC: qcom/common: Use snd-soc-dummy-dai when codec is not specified

[Adam Serbinski <adam@serbinski.com>]

When not specifying a codec, use snd-soc-dummy-dai. This supports
the case where a fixed configuration codec is attached, such as
bluetooth hfp.

Signed-off-by: Adam Serbinski <adam@serbinski.com>
CC: Andy Gross <agross@kernel.org>
CC: Mark Rutland <mark.rutland@arm.com>
CC: Liam Girdwood <lgirdwood@gmail.com>
CC: Patrick Lai <plai@codeaurora.org>
CC: Banajit Goswami <bgoswami@codeaurora.org>
CC: Jaroslav Kysela <perex@perex.cz>
CC: Takashi Iwai <tiwai@suse.com>
CC: alsa-devel@alsa-project.org
CC: linux-arm-msm@vger.kernel.org
CC: devicetree@vger.kernel.org
CC: linux-kernel@vger.kernel.org
---
 sound/soc/qcom/common.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/sound/soc/qcom/common.c b/sound/soc/qcom/common.c
index 6c20bdd850f3..aa2f2238aca0 100644
--- a/sound/soc/qcom/common.c
+++ b/sound/soc/qcom/common.c
@@ -84,7 +84,7 @@ int qcom_snd_parse_of(struct snd_soc_card *card)
 			goto err;
 		}
 
-		if (codec && platform) {
+		if (platform) {
 			link->platforms->of_node = of_parse_phandle(platform,
 					"sound-dai",
 					0);
@@ -94,10 +94,22 @@ int qcom_snd_parse_of(struct snd_soc_card *card)
 				goto err;
 			}
 
-			ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
-			if (ret < 0) {
-				dev_err(card->dev, "%s: codec dai not found\n", link->name);
-				goto err;
+			if (codec) {
+				ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
+				if (ret < 0) {
+					dev_err(card->dev, "%s: codec dai not found\n", link->name);
+					goto err;
+				}
+			} else {
+				dlc = devm_kzalloc(dev,
+						   sizeof(*dlc), GFP_KERNEL);
+				if (!dlc)
+					return -ENOMEM;
+
+				link->codecs = dlc;
+				link->num_codecs = 1;
+				link->codecs->dai_name = "snd-soc-dummy-dai";
+				link->codecs->name = "snd-soc-dummy";
 			}
 			link->no_pcm = 1;
 			link->ignore_pmdown_time = 1;
-- 
2.21.1