[PATCH v7 3/4] ASoC: arizona: Add DVFS handling for sample rate control

Richard Fitzgerald
2015-06-01T13:07:04Z

The WM8997 and WM5102 codecs need to boost DVFS for higher sample rates.

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
sound/soc/codecs/arizona.c | 19 ++++++++++++++++++-
1 files changed, 18 insertions(+), 1 deletions(-)

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 69965ae..f4f3022 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -1393,7 +1393,7 @@ static int arizona_hw_params_rate(struct snd_pcm_substream *substream,
struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
struct arizona_dai_priv *dai_priv = &priv->dai[dai->id - 1];
int base = dai->driver->base;
- int i, sr_val;
+ int i, sr_val, ret;

/*
* We will need to be more flexible than this in future,
@@ -1409,6 +1409,23 @@ static int arizona_hw_params_rate(struct snd_pcm_substream *substream,
}
sr_val = i;

+ switch (priv->arizona->type) {
+ case WM5102:
+ case WM8997:
+ if (arizona_sr_vals[sr_val] >= 88200)
+ ret = arizona_dvfs_up(codec, ARIZONA_DVFS_SR1_RQ);
+ else
+ ret = arizona_dvfs_down(codec, ARIZONA_DVFS_SR1_RQ);
+
+ if (ret) {
+ arizona_aif_err(dai, "Failed to change DVFS %d\n", ret);
+ return ret;
+ }
+ break;
+ default:
+ break;
+ }
+
switch (dai_priv->clk) {
case ARIZONA_CLK_SYSCLK:
switch (priv->arizona->type) {
--
1.7.2.5