linux-kernel - Re: [PATCH 2/2] ASoC: sun4i: Revert A83t description

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Date:   Tue, 27 Aug 2019 17:51:59 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Maxime Ripard <mripard@...nel.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Code Kipper <codekipper@...il.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] ASoC: sun4i: Revert A83t description

On Tue, Aug 27, 2019 at 5:32 PM Maxime Ripard <mripard@...nel.org> wrote:
>
> From: Maxime Ripard <maxime.ripard@...tlin.com>
>
> The last set of reworks included some fixes to change the A83t behaviour
> and "fix" it.
>
> It turns out that the controller described in the datasheet and the one
> supported here are not the same, yet the A83t has the two of them, and the
> one supported in the driver wasn't the one described in the datasheet.
>
> Fix this by reintroducing the proper quirks.
>
> Fixes: 69e450e50ca6 ("ASoC: sun4i-i2s: Fix the LRCK period on A83t")
> Fixes: bf943d527987 ("ASoC: sun4i-i2s: Fix MCLK Enable bit offset on A83t")
> Fixes: 2e04fc4dbf50 ("ASoC: sun4i-i2s: Fix WSS and SR fields for the A83t")
> Fixes: 515fcfbc7736 ("ASoC: sun4i-i2s: Fix LRCK and BCLK polarity offsets on newer SoCs")
> Fixes: c1d3a921d72b ("ASoC: sun4i-i2s: Fix the MCLK and BCLK dividers on newer SoCs")
> Fixes: fb19739d7f68 ("ASoC: sun4i-i2s: Use module clock as BCLK parent on newer SoCs")
> Fixes: 71137bcd0a9a ("ASoC: sun4i-i2s: Move the format configuration to a callback")
> Fixes: d70be625f25a ("ASoC: sun4i-i2s: Move the channel configuration to a callback")
> Reported-by: Chen-Yu Tsai <wens@...e.org>
> Signed-off-by: Maxime Ripard <maxime.ripard@...tlin.com>
> ---
>  sound/soc/sunxi/sun4i-i2s.c | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
> index a6a3f772fdf0..498ceebd9135 100644
> --- a/sound/soc/sunxi/sun4i-i2s.c
> +++ b/sound/soc/sunxi/sun4i-i2s.c
> @@ -1106,18 +1106,18 @@ static const struct sun4i_i2s_quirks sun8i_a83t_i2s_quirks = {
>         .has_reset              = true,
>         .reg_offset_txdata      = SUN8I_I2S_FIFO_TX_REG,
>         .sun4i_i2s_regmap       = &sun4i_i2s_regmap_config,
> -       .field_clkdiv_mclk_en   = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
> -       .field_fmt_wss          = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
> -       .field_fmt_sr           = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
> -       .bclk_dividers          = sun8i_i2s_clk_div,
> -       .num_bclk_dividers      = ARRAY_SIZE(sun8i_i2s_clk_div),
> -       .mclk_dividers          = sun8i_i2s_clk_div,
> -       .num_mclk_dividers      = ARRAY_SIZE(sun8i_i2s_clk_div),
> -       .get_bclk_parent_rate   = sun8i_i2s_get_bclk_parent_rate,
> -       .get_sr                 = sun8i_i2s_get_sr_wss,
> -       .get_wss                = sun8i_i2s_get_sr_wss,
> -       .set_chan_cfg           = sun8i_i2s_set_chan_cfg,
> -       .set_fmt                = sun8i_i2s_set_soc_fmt,
> +       .field_clkdiv_mclk_en   = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
> +       .field_fmt_wss          = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
> +       .field_fmt_sr           = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
> +       .bclk_dividers          = sun4i_i2s_bclk_div,
> +       .num_bclk_dividers      = ARRAY_SIZE(sun4i_i2s_bclk_div),
> +       .mclk_dividers          = sun4i_i2s_mclk_div,
> +       .num_mclk_dividers      = ARRAY_SIZE(sun4i_i2s_mclk_div),
> +       .get_bclk_parent_rate   = sun4i_i2s_get_bclk_parent_rate,
> +       .get_sr                 = sun4i_i2s_get_sr_wss,
> +       .get_wss                = sun4i_i2s_get_sr_wss,

You want sun4i_i2s_get_sr and sun4i_i2s_get_wss here.

Otherwise, with both patches applied, I2S on the A83T returns to normal.

Tested-by: Chen-Yu Tsai <wens@...e.org>

on the Bananapi-M3 with a PiFi DAC v2.0 (has PCM5122) connected.
16bit stereo 44.1kHz, 48kHz, and 96kHz samples tested.

> +       .set_chan_cfg           = sun4i_i2s_set_chan_cfg,
> +       .set_fmt                = sun4i_i2s_set_soc_fmt,
>  };
>
>  static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
> --
> 2.21.0
>