[PATCH RFC 4/6] ASoC: qcom: sdm845: Set codec dai and component sysclk during startup

From: David Heidelberg <[email protected]>

The cs35l36 codec needs the codec dai and component sysclk to be set
during TDM startup. Set these for all codec DAIs on the QUATERNARY_TDM
path, gracefully handling codecs that don't support sysclk by ignoring
-ENOTSUPP returns.

Based on work of Joel Selvaraj.

Signed-off-by: David Heidelberg <[email protected]>
---
 sound/soc/qcom/sdm845.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/sound/soc/qcom/sdm845.c b/sound/soc/qcom/sdm845.c
index 8b65aa3982d47..b2d51e472bc26 100644
--- a/sound/soc/qcom/sdm845.c
+++ b/sound/soc/qcom/sdm845.c
@@ -405,16 +405,38 @@ static int sdm845_snd_startup(struct snd_pcm_substream *substream)
 				ret = snd_soc_dai_set_fmt(
 						codec_dai, codec_dai_fmt);
 				if (ret < 0) {
 					dev_err(rtd->dev,
 						"Right TDM slot err:%d\n", ret);
 					return ret;
 				}
 			}
+
+			/* Set codec sysclk needed by codecs like cs35l36. */
+			ret = snd_soc_dai_set_sysclk(codec_dai, 0,
+						     TDM_BCLK_RATE,
+						     SND_SOC_CLOCK_IN);
+			if (ret < 0 && ret != -ENOTSUPP) {
+				dev_err(codec_dai->dev,
+					"Failed to set codec dai sysclk: %d\n",
+					ret);
+				return ret;
+			}
+
+			ret = snd_soc_component_set_sysclk(codec_dai->component,
+							   0, 0,
+							   TDM_BCLK_RATE,
+							   SND_SOC_CLOCK_IN);
+			if (ret < 0 && ret != -ENOTSUPP) {
+				dev_err(codec_dai->dev,
+					"Failed to set codec component sysclk: %d\n",
+					ret);
+				return ret;
+			}
 		}
 		break;
 	case SLIMBUS_0_RX...SLIMBUS_6_TX:
 		break;
 
 	default:
 		pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
 		break;

-- 
2.53.0