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authorCharles Keepax <ckeepax@opensource.wolfsonmicro.com>2014-05-13 13:45:15 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-06-07 13:25:37 -0700
commitaece7dc95409f8934281954a7e82ddf55b765913 (patch)
tree7a577930b1e0d3d4eaf099d1fb34e860ddb9d835
parentd642daf637d02dacf216d7fd9da7532a4681cfd3 (diff)
downloadlinux-linaro-stable-aece7dc95409f8934281954a7e82ddf55b765913.tar.gz
ASoC: wm8962: Update register CLASS_D_CONTROL_1 to be non-volatile
commit 44330ab516c15dda8a1e660eeaf0003f84e43e3f upstream. The register CLASS_D_CONTROL_1 is marked as volatile because it contains a bit, DAC_MUTE, which is also mirrored in the ADC_DAC_CONTROL_1 register. This causes problems for the "Speaker Switch" control, which will report an error if the CODEC is suspended because it relies on a volatile register. To resolve this issue mark CLASS_D_CONTROL_1 as non-volatile and manually keep the register cache in sync by updating both bits when changing the mute status. Reported-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--sound/soc/codecs/wm8962.c15
-rw-r--r--sound/soc/codecs/wm8962.h4
2 files changed, 16 insertions, 3 deletions
diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index e3cd86514cea..1ae1f8bd9c36 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -153,6 +153,7 @@ static struct reg_default wm8962_reg[] = {
{ 40, 0x0000 }, /* R40 - SPKOUTL volume */
{ 41, 0x0000 }, /* R41 - SPKOUTR volume */
+ { 49, 0x0010 }, /* R49 - Class D Control 1 */
{ 51, 0x0003 }, /* R51 - Class D Control 2 */
{ 56, 0x0506 }, /* R56 - Clocking 4 */
@@ -794,7 +795,6 @@ static bool wm8962_volatile_register(struct device *dev, unsigned int reg)
case WM8962_ALC2:
case WM8962_THERMAL_SHUTDOWN_STATUS:
case WM8962_ADDITIONAL_CONTROL_4:
- case WM8962_CLASS_D_CONTROL_1:
case WM8962_DC_SERVO_6:
case WM8962_INTERRUPT_STATUS_1:
case WM8962_INTERRUPT_STATUS_2:
@@ -2901,13 +2901,22 @@ static int wm8962_set_fll(struct snd_soc_codec *codec, int fll_id, int source,
static int wm8962_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
- int val;
+ int val, ret;
if (mute)
- val = WM8962_DAC_MUTE;
+ val = WM8962_DAC_MUTE | WM8962_DAC_MUTE_ALT;
else
val = 0;
+ /**
+ * The DAC mute bit is mirrored in two registers, update both to keep
+ * the register cache consistent.
+ */
+ ret = snd_soc_update_bits(codec, WM8962_CLASS_D_CONTROL_1,
+ WM8962_DAC_MUTE_ALT, val);
+ if (ret < 0)
+ return ret;
+
return snd_soc_update_bits(codec, WM8962_ADC_DAC_CONTROL_1,
WM8962_DAC_MUTE, val);
}
diff --git a/sound/soc/codecs/wm8962.h b/sound/soc/codecs/wm8962.h
index a1a5d5294c19..910aafd09d21 100644
--- a/sound/soc/codecs/wm8962.h
+++ b/sound/soc/codecs/wm8962.h
@@ -1954,6 +1954,10 @@
#define WM8962_SPKOUTL_ENA_MASK 0x0040 /* SPKOUTL_ENA */
#define WM8962_SPKOUTL_ENA_SHIFT 6 /* SPKOUTL_ENA */
#define WM8962_SPKOUTL_ENA_WIDTH 1 /* SPKOUTL_ENA */
+#define WM8962_DAC_MUTE_ALT 0x0010 /* DAC_MUTE */
+#define WM8962_DAC_MUTE_ALT_MASK 0x0010 /* DAC_MUTE */
+#define WM8962_DAC_MUTE_ALT_SHIFT 4 /* DAC_MUTE */
+#define WM8962_DAC_MUTE_ALT_WIDTH 1 /* DAC_MUTE */
#define WM8962_SPKOUTL_PGA_MUTE 0x0002 /* SPKOUTL_PGA_MUTE */
#define WM8962_SPKOUTL_PGA_MUTE_MASK 0x0002 /* SPKOUTL_PGA_MUTE */
#define WM8962_SPKOUTL_PGA_MUTE_SHIFT 1 /* SPKOUTL_PGA_MUTE */