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Diffstat (limited to 'sound/soc/codecs/wm8741.c')
-rw-r--r--sound/soc/codecs/wm8741.c61
1 files changed, 26 insertions, 35 deletions
diff --git a/sound/soc/codecs/wm8741.c b/sound/soc/codecs/wm8741.c
index 09ff01f2fc1e..b34623786e35 100644
--- a/sound/soc/codecs/wm8741.c
+++ b/sound/soc/codecs/wm8741.c
@@ -125,18 +125,6 @@ static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
{ "VOUTRN", NULL, "DACR" },
};
-static struct {
- int value;
- int ratio;
-} lrclk_ratios[WM8741_NUM_RATES] = {
- { 1, 128 },
- { 2, 192 },
- { 3, 256 },
- { 4, 384 },
- { 5, 512 },
- { 6, 768 },
-};
-
static const unsigned int rates_11289[] = {
44100, 88200,
};
@@ -209,25 +197,16 @@ static const struct snd_pcm_hw_constraint_list constraints_36864 = {
.list = rates_36864,
};
-
static int wm8741_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
- /* The set of sample rates that can be supported depends on the
- * MCLK supplied to the CODEC - enforce this.
- */
- if (!wm8741->sysclk) {
- dev_err(codec->dev,
- "No MCLK configured, call set_sysclk() on init\n");
- return -EINVAL;
- }
-
- snd_pcm_hw_constraint_list(substream->runtime, 0,
- SNDRV_PCM_HW_PARAM_RATE,
- wm8741->sysclk_constraints);
+ if (wm8741->sysclk)
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ wm8741->sysclk_constraints);
return 0;
}
@@ -241,17 +220,24 @@ static int wm8741_hw_params(struct snd_pcm_substream *substream,
u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
int i;
- /* Find a supported LRCLK ratio */
- for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
- if (wm8741->sysclk / params_rate(params) ==
- lrclk_ratios[i].ratio)
+ /* The set of sample rates that can be supported depends on the
+ * MCLK supplied to the CODEC - enforce this.
+ */
+ if (!wm8741->sysclk) {
+ dev_err(codec->dev,
+ "No MCLK configured, call set_sysclk() on init or in hw_params\n");
+ return -EINVAL;
+ }
+
+ /* Find a supported LRCLK rate */
+ for (i = 0; i < wm8741->sysclk_constraints->count; i++) {
+ if (wm8741->sysclk_constraints->list[i] == params_rate(params))
break;
}
- /* Should never happen, should be handled by constraints */
- if (i == ARRAY_SIZE(lrclk_ratios)) {
- dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
- wm8741->sysclk / params_rate(params));
+ if (i == wm8741->sysclk_constraints->count) {
+ dev_err(codec->dev, "LRCLK %d unsupported with MCLK %d\n",
+ params_rate(params), wm8741->sysclk);
return -EINVAL;
}
@@ -274,8 +260,8 @@ static int wm8741_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
- dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
- params_width(params));
+ dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d, rate param = %d",
+ params_width(params), params_rate(params));
snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
return 0;
@@ -290,6 +276,11 @@ static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
switch (freq) {
+ case 0:
+ wm8741->sysclk_constraints = NULL;
+ wm8741->sysclk = freq;
+ return 0;
+
case 11289600:
wm8741->sysclk_constraints = &constraints_11289;
wm8741->sysclk = freq;