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path: root/sound/soc/codecs/wm8994.c
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Diffstat (limited to 'sound/soc/codecs/wm8994.c')
-rw-r--r--sound/soc/codecs/wm8994.c156
1 files changed, 147 insertions, 9 deletions
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index d5fb7f5dd551..15ce64a48a87 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -167,12 +167,12 @@ static int configure_aif_clock(struct snd_soc_component *component, int aif)
switch (wm8994->sysclk[aif]) {
case WM8994_SYSCLK_MCLK1:
- rate = wm8994->mclk[0];
+ rate = wm8994->mclk_rate[0];
break;
case WM8994_SYSCLK_MCLK2:
reg1 |= 0x8;
- rate = wm8994->mclk[1];
+ rate = wm8994->mclk_rate[1];
break;
case WM8994_SYSCLK_FLL1:
@@ -1038,6 +1038,45 @@ static bool wm8994_check_class_w_digital(struct snd_soc_component *component)
return true;
}
+static int aif_mclk_set(struct snd_soc_component *component, int aif, bool enable)
+{
+ struct wm8994_priv *wm8994 = snd_soc_component_get_drvdata(component);
+ unsigned int offset, val, clk_idx;
+ int ret;
+
+ if (aif)
+ offset = 4;
+ else
+ offset = 0;
+
+ val = snd_soc_component_read32(component, WM8994_AIF1_CLOCKING_1 + offset);
+ val &= WM8994_AIF1CLK_SRC_MASK;
+
+ switch (val) {
+ case 0:
+ clk_idx = WM8994_MCLK1;
+ break;
+ case 1:
+ clk_idx = WM8994_MCLK2;
+ break;
+ default:
+ return 0;
+ }
+
+ if (enable) {
+ ret = clk_prepare_enable(wm8994->mclk[clk_idx].clk);
+ if (ret < 0) {
+ dev_err(component->dev, "Failed to enable MCLK%d\n",
+ clk_idx);
+ return ret;
+ }
+ } else {
+ clk_disable_unprepare(wm8994->mclk[clk_idx].clk);
+ }
+
+ return 0;
+}
+
static int aif1clk_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
@@ -1045,7 +1084,7 @@ static int aif1clk_ev(struct snd_soc_dapm_widget *w,
struct wm8994_priv *wm8994 = snd_soc_component_get_drvdata(component);
struct wm8994 *control = wm8994->wm8994;
int mask = WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA;
- int i;
+ int ret, i;
int dac;
int adc;
int val;
@@ -1061,6 +1100,10 @@ static int aif1clk_ev(struct snd_soc_dapm_widget *w,
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
+ ret = aif_mclk_set(component, 0, true);
+ if (ret < 0)
+ return ret;
+
/* Don't enable timeslot 2 if not in use */
if (wm8994->channels[0] <= 2)
mask &= ~(WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA);
@@ -1133,6 +1176,12 @@ static int aif1clk_ev(struct snd_soc_dapm_widget *w,
break;
}
+ switch (event) {
+ case SND_SOC_DAPM_POST_PMD:
+ aif_mclk_set(component, 0, false);
+ break;
+ }
+
return 0;
}
@@ -1140,13 +1189,17 @@ static int aif2clk_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
- int i;
+ int ret, i;
int dac;
int adc;
int val;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
+ ret = aif_mclk_set(component, 1, true);
+ if (ret < 0)
+ return ret;
+
val = snd_soc_component_read32(component, WM8994_AIF2_CONTROL_1);
if ((val & WM8994_AIF2ADCL_SRC) &&
(val & WM8994_AIF2ADCR_SRC))
@@ -1218,6 +1271,12 @@ static int aif2clk_ev(struct snd_soc_dapm_widget *w,
break;
}
+ switch (event) {
+ case SND_SOC_DAPM_POST_PMD:
+ aif_mclk_set(component, 1, false);
+ break;
+ }
+
return 0;
}
@@ -1623,10 +1682,10 @@ SND_SOC_DAPM_POST("Late Disable PGA", late_disable_ev)
static const struct snd_soc_dapm_widget wm8994_lateclk_widgets[] = {
SND_SOC_DAPM_SUPPLY("AIF1CLK", WM8994_AIF1_CLOCKING_1, 0, 0, aif1clk_ev,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
- SND_SOC_DAPM_PRE_PMD),
+ SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_SUPPLY("AIF2CLK", WM8994_AIF2_CLOCKING_1, 0, 0, aif2clk_ev,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
- SND_SOC_DAPM_PRE_PMD),
+ SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_PGA("Direct Voice", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("SPKL", WM8994_POWER_MANAGEMENT_3, 8, 0,
left_speaker_mixer, ARRAY_SIZE(left_speaker_mixer)),
@@ -2141,6 +2200,7 @@ static int _wm8994_set_fll(struct snd_soc_component *component, int id, int src,
u16 reg, clk1, aif_reg, aif_src;
unsigned long timeout;
bool was_enabled;
+ struct clk *mclk;
switch (id) {
case WM8994_FLL1:
@@ -2216,6 +2276,27 @@ static int _wm8994_set_fll(struct snd_soc_component *component, int id, int src,
snd_soc_component_update_bits(component, WM8994_FLL1_CONTROL_1 + reg_offset,
WM8994_FLL1_ENA, 0);
+ /* Disable MCLK if needed before we possibly change to new clock parent */
+ if (was_enabled) {
+ reg = snd_soc_component_read32(component, WM8994_FLL1_CONTROL_5
+ + reg_offset);
+ reg = ((reg & WM8994_FLL1_REFCLK_SRC_MASK)
+ >> WM8994_FLL1_REFCLK_SRC_SHIFT) + 1;
+
+ switch (reg) {
+ case WM8994_FLL_SRC_MCLK1:
+ mclk = wm8994->mclk[WM8994_MCLK1].clk;
+ break;
+ case WM8994_FLL_SRC_MCLK2:
+ mclk = wm8994->mclk[WM8994_MCLK2].clk;
+ break;
+ default:
+ mclk = NULL;
+ }
+
+ clk_disable_unprepare(mclk);
+ }
+
if (wm8994->fll_byp && src == WM8994_FLL_SRC_BCLK &&
freq_in == freq_out && freq_out) {
dev_dbg(component->dev, "Bypassing FLL%d\n", id + 1);
@@ -2260,10 +2341,29 @@ static int _wm8994_set_fll(struct snd_soc_component *component, int id, int src,
/* Clear any pending completion from a previous failure */
try_wait_for_completion(&wm8994->fll_locked[id]);
+ switch (src) {
+ case WM8994_FLL_SRC_MCLK1:
+ mclk = wm8994->mclk[WM8994_MCLK1].clk;
+ break;
+ case WM8994_FLL_SRC_MCLK2:
+ mclk = wm8994->mclk[WM8994_MCLK2].clk;
+ break;
+ default:
+ mclk = NULL;
+ }
+
/* Enable (with fractional mode if required) */
if (freq_out) {
+ ret = clk_prepare_enable(mclk);
+ if (ret < 0) {
+ dev_err(component->dev, "Failed to enable MCLK for FLL%d\n",
+ id + 1);
+ return ret;
+ }
+
/* Enable VMID if we need it */
if (!was_enabled) {
+
active_reference(component);
switch (control->type) {
@@ -2372,12 +2472,29 @@ static int wm8994_set_fll(struct snd_soc_dai *dai, int id, int src,
return _wm8994_set_fll(dai->component, id, src, freq_in, freq_out);
}
+static int wm8994_set_mclk_rate(struct wm8994_priv *wm8994, unsigned int id,
+ unsigned int *freq)
+{
+ int ret;
+
+ if (!wm8994->mclk[id].clk || *freq == wm8994->mclk_rate[id])
+ return 0;
+
+ ret = clk_set_rate(wm8994->mclk[id].clk, *freq);
+ if (ret < 0)
+ return ret;
+
+ *freq = clk_get_rate(wm8994->mclk[id].clk);
+
+ return 0;
+}
+
static int wm8994_set_dai_sysclk(struct snd_soc_dai *dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_component *component = dai->component;
struct wm8994_priv *wm8994 = snd_soc_component_get_drvdata(component);
- int i;
+ int ret, i;
switch (dai->id) {
case 1:
@@ -2392,7 +2509,12 @@ static int wm8994_set_dai_sysclk(struct snd_soc_dai *dai,
switch (clk_id) {
case WM8994_SYSCLK_MCLK1:
wm8994->sysclk[dai->id - 1] = WM8994_SYSCLK_MCLK1;
- wm8994->mclk[0] = freq;
+
+ ret = wm8994_set_mclk_rate(wm8994, dai->id - 1, &freq);
+ if (ret < 0)
+ return ret;
+
+ wm8994->mclk_rate[0] = freq;
dev_dbg(dai->dev, "AIF%d using MCLK1 at %uHz\n",
dai->id, freq);
break;
@@ -2400,7 +2522,12 @@ static int wm8994_set_dai_sysclk(struct snd_soc_dai *dai,
case WM8994_SYSCLK_MCLK2:
/* TODO: Set GPIO AF */
wm8994->sysclk[dai->id - 1] = WM8994_SYSCLK_MCLK2;
- wm8994->mclk[1] = freq;
+
+ ret = wm8994_set_mclk_rate(wm8994, dai->id - 1, &freq);
+ if (ret < 0)
+ return ret;
+
+ wm8994->mclk_rate[1] = freq;
dev_dbg(dai->dev, "AIF%d using MCLK2 at %uHz\n",
dai->id, freq);
break;
@@ -4456,6 +4583,7 @@ static const struct snd_soc_component_driver soc_component_dev_wm8994 = {
static int wm8994_probe(struct platform_device *pdev)
{
struct wm8994_priv *wm8994;
+ int ret;
wm8994 = devm_kzalloc(&pdev->dev, sizeof(struct wm8994_priv),
GFP_KERNEL);
@@ -4467,6 +4595,16 @@ static int wm8994_probe(struct platform_device *pdev)
wm8994->wm8994 = dev_get_drvdata(pdev->dev.parent);
+ wm8994->mclk[WM8994_MCLK1].id = "MCLK1";
+ wm8994->mclk[WM8994_MCLK2].id = "MCLK2";
+
+ ret = devm_clk_bulk_get_optional(pdev->dev.parent, ARRAY_SIZE(wm8994->mclk),
+ wm8994->mclk);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to get clocks: %d\n", ret);
+ return ret;
+ }
+
pm_runtime_enable(&pdev->dev);
pm_runtime_idle(&pdev->dev);
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