AC97 configures most of registers earlier to start a communication with CODECs in order to successfully initialize CODEC. Currently, _fsl_ssi_set_dai_fmt() and fsl_ssi_setup_ac97() are called to get all SSI registers properly set.
Since now the driver has a fsl_ssi_hw_init() to handle all register initial settings, this patch moves those register settings of AC97 to the fsl_ssi_hw_init() as well.
Meanwhile it applies _fsl_ssi_set_dai_fmt() call to AC97 only since other formats would be configured via normal set_dai_fmt() directly.
This patch also adds fsl_ssi_hw_clean() to cleanup control bits for AC97 in the platform remote() function.
Signed-off-by: Nicolin Chen nicoleotsuka@gmail.com Tested-by: Caleb Crome caleb@crome.org --- sound/soc/fsl/fsl_ssi.c | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-)
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 36e370e..178c192 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -982,9 +982,6 @@ static int _fsl_ssi_set_dai_fmt(struct device *dev, regmap_write(regs, REG_SSI_SRCR, srcr); regmap_write(regs, REG_SSI_SCR, scr);
- if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_AC97) - fsl_ssi_setup_ac97(ssi); - return 0; }
@@ -1250,10 +1247,28 @@ static int fsl_ssi_hw_init(struct fsl_ssi *ssi) regmap_update_bits(ssi->regs, REG_SSI_SCR, SSI_SCR_TCH_EN, SSI_SCR_TCH_EN);
+ /* AC97 should start earlier to communicate with CODECs */ + if (fsl_ssi_is_ac97(ssi)) { + _fsl_ssi_set_dai_fmt(ssi->dev, ssi, ssi->dai_fmt); + fsl_ssi_setup_ac97(ssi); + } + return 0; }
/** + * Clear SSI registers + */ +static void fsl_ssi_hw_clean(struct fsl_ssi *ssi) +{ + /* Disable registers for AC97 */ + if (fsl_ssi_is_ac97(ssi)) { + regmap_write(ssi->regs, REG_SSI_SCR, 0); + regmap_write(ssi->regs, REG_SSI_SACNT, 0); + regmap_write(ssi->regs, REG_SSI_SOR, 0); + } +} +/** * Make every character in a string lower-case */ static void make_lowercase(char *s) @@ -1535,9 +1550,6 @@ static int fsl_ssi_probe(struct platform_device *pdev) }
done: - if (ssi->dai_fmt) - _fsl_ssi_set_dai_fmt(dev, ssi, ssi->dai_fmt); - /* Initially configures SSI registers */ fsl_ssi_hw_init(ssi);
@@ -1582,6 +1594,8 @@ static int fsl_ssi_remove(struct platform_device *pdev) { struct fsl_ssi *ssi = dev_get_drvdata(&pdev->dev);
+ fsl_ssi_hw_clean(ssi); + fsl_ssi_debugfs_remove(&ssi->dbg_stats);
if (ssi->pdev)