From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Tue, 5 Mar 2013 04:07:16 +0000 (+0800)
Subject: ASoC: arizona: Increase FLL synchroniser bandwidth for high frequencies
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=576411be200ee0e0801f1fe57d5e7ee787bb1a90;p=linux-beck.git

ASoC: arizona: Increase FLL synchroniser bandwidth for high frequencies

If we are using a high freqency SYNCCLK then increasing the bandwidth of
the synchroniser improves performance.

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

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 0599ff8ea935..e3aee143487e 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -1157,6 +1157,17 @@ static void arizona_enable_fll(struct arizona_fll *fll,
 		return;
 	}
 
+	/*
+	 * Increase the bandwidth if we're not using a low frequency
+	 * sync source.
+	 */
+	if (fll->sync_src >= 0 && fll->sync_freq > 100000)
+		regmap_update_bits(arizona->regmap, fll->base + 0x17,
+				   ARIZONA_FLL1_SYNC_BW, 0);
+	else
+		regmap_update_bits(arizona->regmap, fll->base + 0x17,
+				   ARIZONA_FLL1_SYNC_BW, ARIZONA_FLL1_SYNC_BW);
+
 	if (!arizona_is_enabled_fll(fll))
 		pm_runtime_get(arizona->dev);