This adds a new mode WM8904_CLK_AUTO which automatically enables the FLL if a frequency different than the MCLK is set.

These additions make the codec work with the simple-card driver in general and especially in systems where the MCLK doesn't match the required clock.

Signed-off-by: Michael Walle michael@walle.cc --- changes since v1: - replaced second clk_get_rate() with mclk_freq

Please note that the v1 patch might still be pending for moderator approval.

sound/soc/codecs/wm8904.c | 72 ++++++++++++++++++++++++--------------- sound/soc/codecs/wm8904.h | 1 + 2 files changed, 45 insertions(+), 28 deletions(-)

diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c index bcb3c9d5abf0..2a7d23a5daa8 100644 --- a/sound/soc/codecs/wm8904.c +++ b/sound/soc/codecs/wm8904.c @@ -1410,34 +1410,6 @@ static int wm8904_hw_params(struct snd_pcm_substream *substream, return 0; }

- -static int wm8904_set_sysclk(struct snd_soc_dai *dai, int clk_id, - unsigned int freq, int dir) -{ - struct snd_soc_component *component = dai->component; - struct wm8904_priv *priv = snd_soc_component_get_drvdata(component); - - switch (clk_id) { - case WM8904_CLK_MCLK: - priv->sysclk_src = clk_id; - priv->mclk_rate = freq; - break; - - case WM8904_CLK_FLL: - priv->sysclk_src = clk_id; - break; - - default: - return -EINVAL; - } - - dev_dbg(dai->dev, "Clock source is %d at %uHz\n", clk_id, freq); - - wm8904_configure_clocking(component); - - return 0; -} - static int wm8904_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct snd_soc_component *component = dai->component; @@ -1824,6 +1796,50 @@ static int wm8904_set_fll(struct snd_soc_dai *dai, int fll_id, int source, return 0; }

+static int wm8904_set_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + struct snd_soc_component *component = dai->component; + struct wm8904_priv *priv = snd_soc_component_get_drvdata(component); + unsigned long mclk_freq; + int ret; + + switch (clk_id) { + case WM8904_CLK_AUTO: + mclk_freq = clk_get_rate(priv->mclk); + /* enable FLL if a different sysclk is desired */ + if (mclk_freq != freq) { + priv->sysclk_src = WM8904_CLK_FLL; + ret = wm8904_set_fll(dai, WM8904_FLL_MCLK, + WM8904_FLL_MCLK, + mclk_freq, freq); + if (ret) + return ret; + break; + } + clk_id = WM8904_CLK_MCLK; + /* fallthrough */ + + case WM8904_CLK_MCLK: + priv->sysclk_src = clk_id; + priv->mclk_rate = freq; + break; + + case WM8904_CLK_FLL: + priv->sysclk_src = clk_id; + break; + + default: + return -EINVAL; + } + + dev_dbg(dai->dev, "Clock source is %d at %uHz\n", clk_id, freq); + + wm8904_configure_clocking(component); + + return 0; +} + static int wm8904_digital_mute(struct snd_soc_dai *codec_dai, int mute) { struct snd_soc_component *component = codec_dai->component; diff --git a/sound/soc/codecs/wm8904.h b/sound/soc/codecs/wm8904.h index c1bca52f9927..de6340446b1f 100644 --- a/sound/soc/codecs/wm8904.h +++ b/sound/soc/codecs/wm8904.h @@ -10,6 +10,7 @@ #ifndef _WM8904_H #define _WM8904_H

+#define WM8904_CLK_AUTO 0 #define WM8904_CLK_MCLK 1 #define WM8904_CLK_FLL 2