From 0d3f01dcdc234001f979a0af0b6b31cb9f25b6c1 Mon Sep 17 00:00:00 2001 From: Jerome Brunet Date: Wed, 29 Jul 2020 17:44:55 +0200 Subject: [PATCH] ASoC: meson: axg-tdm-formatters: fix sclk inversion 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: 1a11d88f499c ("ASoC: meson: add tdm formatter base driver") Signed-off-by: Jerome Brunet Link: https://lore.kernel.org/r/20200729154456.1983396-4-jbrunet@baylibre.com Signed-off-by: Mark Brown --- sound/soc/meson/axg-tdm-formatter.c | 11 ++++++----- sound/soc/meson/axg-tdm-formatter.h | 1 - sound/soc/meson/axg-tdmin.c | 2 -- sound/soc/meson/axg-tdmout.c | 3 --- 4 files changed, 6 insertions(+), 11 deletions(-) diff --git a/sound/soc/meson/axg-tdm-formatter.c b/sound/soc/meson/axg-tdm-formatter.c index 358c8c0..f7e8e9d 100644 --- a/sound/soc/meson/axg-tdm-formatter.c +++ b/sound/soc/meson/axg-tdm-formatter.c @@ -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; diff --git a/sound/soc/meson/axg-tdm-formatter.h b/sound/soc/meson/axg-tdm-formatter.h index 9ef98e9..a1f0dcc 100644 --- a/sound/soc/meson/axg-tdm-formatter.h +++ b/sound/soc/meson/axg-tdm-formatter.h @@ -16,7 +16,6 @@ struct snd_kcontrol; struct axg_tdm_formatter_hw { unsigned int skew_offset; - bool invert_sclk; }; struct axg_tdm_formatter_ops { diff --git a/sound/soc/meson/axg-tdmin.c b/sound/soc/meson/axg-tdmin.c index 3d002b4..88ed95a 100644 --- a/sound/soc/meson/axg-tdmin.c +++ b/sound/soc/meson/axg-tdmin.c @@ -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, }, }; diff --git a/sound/soc/meson/axg-tdmout.c b/sound/soc/meson/axg-tdmout.c index 418ec31..3ceabdd 100644 --- a/sound/soc/meson/axg-tdmout.c +++ b/sound/soc/meson/axg-tdmout.c @@ -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, }, }; -- 2.7.4