If the initialization is not finished, then filling input data to the FIFO may fail. So it is better to add initialization finishing check in the runtime resume for suspend & resume case.
And consider the case of three instances working in parallel, increase the retry times to 50 for more initialization time.
Signed-off-by: Shengjiu Wang shengjiu.wang@nxp.com --- changes in v2: - update comments.
sound/soc/fsl/fsl_asrc.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c index aa5edf32d988..b394b762025d 100644 --- a/sound/soc/fsl/fsl_asrc.c +++ b/sound/soc/fsl/fsl_asrc.c @@ -20,6 +20,7 @@
#define IDEAL_RATIO_DECIMAL_DEPTH 26 #define DIVIDER_NUM 64 +#define INIT_TRY_NUM 50
#define pair_err(fmt, ...) \ dev_err(&asrc->pdev->dev, "Pair %c: " fmt, 'A' + index, ##__VA_ARGS__) @@ -579,7 +580,7 @@ static void fsl_asrc_start_pair(struct fsl_asrc_pair *pair) { struct fsl_asrc *asrc = pair->asrc; enum asrc_pair_index index = pair->index; - int reg, retry = 10, i; + int reg, retry = INIT_TRY_NUM, i;
/* Enable the current pair */ regmap_update_bits(asrc->regmap, REG_ASRCTR, @@ -592,6 +593,10 @@ static void fsl_asrc_start_pair(struct fsl_asrc_pair *pair) reg &= ASRCFG_INIRQi_MASK(index); } while (!reg && --retry);
+ /* NOTE: Doesn't treat initialization timeout as error */ + if (!retry) + dev_warn(&asrc->pdev->dev, "initialization isn't finished\n"); + /* Make the input fifo to ASRC STALL level */ regmap_read(asrc->regmap, REG_ASRCNCR, ®); for (i = 0; i < pair->channels * 4; i++) @@ -1257,6 +1262,7 @@ static int fsl_asrc_runtime_resume(struct device *dev) { struct fsl_asrc *asrc = dev_get_drvdata(dev); struct fsl_asrc_priv *asrc_priv = asrc->private; + int reg, retry = INIT_TRY_NUM; int i, ret; u32 asrctr;
@@ -1295,6 +1301,20 @@ static int fsl_asrc_runtime_resume(struct device *dev) regmap_update_bits(asrc->regmap, REG_ASRCTR, ASRCTR_ASRCEi_ALL_MASK, asrctr);
+ /* Wait for status of initialization for every enabled pairs */ + do { + udelay(5); + regmap_read(asrc->regmap, REG_ASRCFG, ®); + reg = (reg >> ASRCFG_INIRQi_SHIFT(0)) & 0x7; + } while ((reg != ((asrctr >> ASRCTR_ASRCEi_SHIFT(0)) & 0x7)) && --retry); + + /* + * NOTE: Doesn't treat initialization timeout as error + * Some of pair maybe success, then still can continue. + */ + if (!retry) + dev_warn(dev, "initialization isn't finished\n"); + return 0;
disable_asrck_clk: