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ASoC: wm8962: Update register CLASS_D_CONTROL_1 to be non-volatile

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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>
Cc: stable@vger.kernel.org
This commit is contained in:
Charles Keepax 2014-05-13 13:45:15 +01:00 committed by Mark Brown
parent c9eaa447e7
commit 44330ab516
2 changed files with 16 additions and 3 deletions
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15
sound/soc/codecs/wm8962.c
View File

@ -154,6 +154,7 @@ 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 */
@ -795,7 +796,6 @@ 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:
@ -2929,13 +2929,22 @@ 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);
}

4
sound/soc/codecs/wm8962.h
View File

@ -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 */