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ASoC: meson: axg-tdm-formatters: fix sclk inversion 

[ Upstream commit 0d3f01dcdc ]

After carefully checking, it appears that both tdmout and tdmin require the
rising edge of the sclk they get to be synchronized with the frame sync
event (which should be a rising edge of lrclk).

TDMIN was improperly set before this patch. Remove the sclk_invert quirk
which is no longer needed and fix the sclk phase.

Fixes: 1a11d88f49 ("ASoC: meson: add tdm formatter base driver")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200729154456.1983396-4-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Jerome Brunet 2020-07-29 17:44:55 +02:00 committed by Greg Kroah-Hartman
parent 0cc88bf694
commit 115da6e650
4 changed files with 6 additions and 11 deletions
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11
sound/soc/meson/axg-tdm-formatter.c
View File

@ -70,7 +70,7 @@ EXPORT_SYMBOL_GPL(axg_tdm_formatter_set_channel_masks);
static int axg_tdm_formatter_enable(struct axg_tdm_formatter *formatter)
{
struct axg_tdm_stream *ts = formatter->stream;
bool invert = formatter->drv->quirks->invert_sclk;
bool invert;
int ret;
/* Do nothing if the formatter is already enabled */
@ -96,11 +96,12 @@ static int axg_tdm_formatter_enable(struct axg_tdm_formatter *formatter)
return ret;
/*
* If sclk is inverted, invert it back and provide the inversion
* required by the formatter
* If sclk is inverted, it means the bit should latched on the
* rising edge which is what our HW expects. If not, we need to
* invert it before the formatter.
*/
invert ^= axg_tdm_sclk_invert(ts->iface->fmt);
ret = clk_set_phase(formatter->sclk, invert ? 180 : 0);
invert = axg_tdm_sclk_invert(ts->iface->fmt);
ret = clk_set_phase(formatter->sclk, invert ? 0 : 180);
if (ret)
return ret;

1
sound/soc/meson/axg-tdm-formatter.h
View File

@ -16,7 +16,6 @@ struct snd_kcontrol;
struct axg_tdm_formatter_hw {
unsigned int skew_offset;
bool invert_sclk;
};
struct axg_tdm_formatter_ops {

2
sound/soc/meson/axg-tdmin.c
View File

@ -228,7 +228,6 @@ static const struct axg_tdm_formatter_driver axg_tdmin_drv = {
.regmap_cfg = &axg_tdmin_regmap_cfg,
.ops = &axg_tdmin_ops,
.quirks = &(const struct axg_tdm_formatter_hw) {
.invert_sclk = false,
.skew_offset = 2,
},
};
@ -238,7 +237,6 @@ static const struct axg_tdm_formatter_driver g12a_tdmin_drv = {
.regmap_cfg = &axg_tdmin_regmap_cfg,
.ops = &axg_tdmin_ops,
.quirks = &(const struct axg_tdm_formatter_hw) {
.invert_sclk = false,
.skew_offset = 3,
},
};

3
sound/soc/meson/axg-tdmout.c
View File

@ -238,7 +238,6 @@ static const struct axg_tdm_formatter_driver axg_tdmout_drv = {
.regmap_cfg = &axg_tdmout_regmap_cfg,
.ops = &axg_tdmout_ops,
.quirks = &(const struct axg_tdm_formatter_hw) {
.invert_sclk = true,
.skew_offset = 1,
},
};
@ -248,7 +247,6 @@ static const struct axg_tdm_formatter_driver g12a_tdmout_drv = {
.regmap_cfg = &axg_tdmout_regmap_cfg,
.ops = &axg_tdmout_ops,
.quirks = &(const struct axg_tdm_formatter_hw) {
.invert_sclk = true,
.skew_offset = 2,
},
};
@ -309,7 +307,6 @@ static const struct axg_tdm_formatter_driver sm1_tdmout_drv = {
.regmap_cfg = &axg_tdmout_regmap_cfg,
.ops = &axg_tdmout_ops,
.quirks = &(const struct axg_tdm_formatter_hw) {
.invert_sclk = true,
.skew_offset = 2,
},
};