[PATCH v3 13/17] ASoC: fsl_ssi: Setup AC97 in fsl_ssi_hw_init()
From: Nicolin Chen <nicoleotsuka@gmail.com>
Date: 2018-01-15 04:23:48
Also in:
alsa-devel, lkml
Subsystem:
freescale soc sound drivers, sound, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Shengjiu Wang, Xiubo Li, Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Linus Torvalds
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 <redacted> --- Changelog v2 * Moved all to fsl_ssi_hw_init() in platform probe() * Added fsl_ssi_hw_clean() instead of dai remove() 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 50648f5..ebb3eb9 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c@@ -987,9 +987,6 @@ 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; }
@@ -1255,10 +1252,28 @@ 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)
@@ -1540,9 +1555,6 @@ 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);
@@ -1587,6 +1599,8 @@ 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)
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2.7.4